CN103209465B - The method to set up of quiet period network allocation vector, Apparatus and system - Google Patents
The method to set up of quiet period network allocation vector, Apparatus and system Download PDFInfo
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- CN103209465B CN103209465B CN201210011365.5A CN201210011365A CN103209465B CN 103209465 B CN103209465 B CN 103209465B CN 201210011365 A CN201210011365 A CN 201210011365A CN 103209465 B CN103209465 B CN 103209465B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The present invention is applicable to the communications field, provide a kind of method to set up, Apparatus and system of quiet period network allocation vector, described method comprises: when quiet interval starts, do you judge silent channel element Quiet? Channel? whether element and the element Quiet that mourns in silence? did element send together or received together, described Quiet? Channel? AP silent mode AP in element? Quiet? Mode equals 0; Do you when judged result is for being, network allocation vector NAV is set to Quiet? the quiet interval duration that element sets up.Technical scheme provided by the invention has the correct advantage of quiet period channel competition.
Description
Technical field
The invention belongs to the communications field, particularly relate to a kind of technology of setting of quiet period network allocation vector.
Background technology
Basic Service Set (Basicserviceset, BSS) is the element of a WLAN (wireless local area network) (WirelessLocalareanetwork, WLAN).Be within a certain particular coverage, and the website (Station, STA) with certain association forms a BSS.The most citation form of association is the mutual direct communication in an ad-hoc network of each website, and this is called as independent BSS (IndependentBSS, IBSS).In addition, more common situation is that STA is associated with the central location of a full-time administrative BSS, and this central location is called as access point (Accesspoint, AP).The BSS be based upon on AP basis is called as the BSS of band infrastructure.
A kind of new frame format is introduced in 802.11ac, can be used for that the channel width of information transmission is maximum can arrive 160MHz, support that the website of this frame format is called as superelevation throughput website (VeryHighThroughputStation, VHTSTA), do not support that the website of this frame format is called as non-super high-throughput website (NonVeryHighThroughputStation, Non-VHTSTA); In same network, VHTSTAs and Non-VHTSTAs can be there is simultaneously.802.11ac in, the maximum channel bandwidth 160MHz that can be used for information transmission can by continuous print 160MHz channel, or be made up of discrete two 80MHz channels, wherein, the 80MHz channel comprising main 20MHz channel is called main 80MHz channel (primary80MHzchannel), and remaining 80MHz channel is called auxiliary 80MHz (secondary80MHzchannel).Based on objects such as channel measurements, AP can carry element of mourning in silence (Quietelement) and indicate all STAs under this BSS to keep mourning in silence within certain time period in beacon frame (Beaconframe) or probing response frame (ProbeResponseframe), and this time period is called as quiet interval (quietinterval) or quiet period.
The concrete form of Quietelement is as follows as shown in Figure 1:
Wherein, QuietDuration is set to quiet interval duration.
Quietelement introduces in the standard before 802.11ac, is mainly used in Non-VHTSTAs.For 802.11ac, introduce silent channel element (QuietChannelelement), be used to indicate frequency band available in quiet interval and using method, VHTSTAs can identify QuietChannelelement, and Non-VHTSTAs can not identify QuietChannelelement.
AP can send separately QuietChannelelement or sends separately Quietelement or send QuietChannelelement and Quietelement simultaneously in beacon frame (Beaconframe) or probing response frame (ProbeResponseframe).
The frame format of QuietChannelelement as shown in Figure 2.
The concrete using method of QuietChannelelement is as follows:
If AP have sent QuietChannelelement, then represent that in quiet interval, main 80MHz channel can use (auxiliary 80MHz channel is unavailable), be divided into two kinds of situations:
If AP silent mode territory (APQuietModefield) equals 1, then in quiet interval, on main 80MHz channel, STA can communicate with AP or communication direct-connected with other STA;
If AP silent mode territory (APQuietModefield) equals 0, then in quiet interval, STA and AP is not allowed to communicate (comprising main 80MHz channel and auxiliary 80MHz channel); But on main 80MHz channel, STA can communication direct-connected with other STA.
Between STA, direct-connected communication refers to directly carry out information transmission between STA, does not need AP to carry out transfer.The direct-connected communication mode supported in existing WLAN agreement comprises DLS (Direct-LinkSetup) and TDLS (TunnelledDirect-LinkSetup).
Network allocation vector (Networkallocationvector, NAV) provides a kind of virtual carrier sense mechanism.The value of NAV, instruction a period of time channel is in busy state, and when NAV is non-vanishing, STA can not access channel usually, and namely STA can not carry out channel competition.
It is as follows that the NAV of VHTSTA when quiet interval starts arranges rule:
(1) when not do not send together with Quietelement or receive silent channel element (QuietChannelelement) and AP silent mode (APQuietMode) equals 0 time, all VHTSTAs (comprise AP, AP is a kind of special STA) NAV can be set to quiet interval duration, described quiet interval is set up by Quietelement.
(2) when sent together with element of mourning in silence (Quietelement) or receive QuietChannelelement and APQuietMode equals 0 time, the NAV of AP and indirectly connected VHTSTA does not reset.
Realizing in process of the present invention, there are the following problems for the technical scheme of discovery prior art:
(1) APQuietMode equals the QuietChannelelement of 0 and not to send or situation about receiving comprises: send or receive QuietChannelelement, but APQuietMode equals 1.
Therefore, when sending together with Quietelement or receiving QuietChannelelement, and the APQuietMode in QuietChannelelement is when equaling 1, the NAV of VHTSTAs (comprising AP) can be set to quiet interval duration, therefore in quiet period, VHTSTAs can not competitive channel.
(2) when sending together with Quietelement or receiving QuietChannelelement, and the APQuietMode in QuietChannelelement is when equaling 0, the NAV of AP and indirectly connected VHTnon-APSTA does not reset, therefore between quiet period, the NAV of AP and indirectly connected VHTnon-APSTA may be reduced to 0, can cause invalid channel competition.
Therefore, existing technical scheme exists in the incorrect problem of quiet period channel competition, namely should carry out channel competition can not competitive channel, should not carry out channel competition but can competitive channel.
Summary of the invention
The object of the embodiment of the present invention is the method to set up and the system that provide a kind of quiet period network allocation vector, is intended to solve existing technical scheme in the incorrect problem of quiet period channel competition.
On the one hand, the invention provides a kind of method to set up of quiet period network allocation vector, described method comprises:
When quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
On the other hand, the invention provides a kind of method to set up of quiet period network allocation vector, described method comprises:
When quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
Further aspect, the present invention also provides a kind of setting device of quiet period network allocation vector, and described device comprises:
Judging unit, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
Network allocation vector setting unit, for when judged result is for being, is set to the quiet interval duration that Quietelement sets up by network allocation vector NAV.
Also on the one hand, the present invention also provides a kind of setting device of quiet period network allocation vector, and described device comprises:
Judging unit, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Network allocation vector setting unit, for described judging unit judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
Another aspect, what the invention provides a kind of quiet period network allocation vector arranges system, and described system comprises:
Access point AP and indirectly connected superelevation throughput non-ap stations point VHTnon-APSTAs;
Wherein, described AP, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up;
Described indirectly connected VHTnon-APSTAs, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
Last aspect, what the invention provides a kind of quiet period network allocation vector arranges system, and described system comprises:
Access point AP and superelevation throughput non-ap stations point VHTnon-APSTAs;
Wherein, described AP, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant;
Described VHTnon-APSTAs, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
In embodiments of the present invention, technical scheme provided by the invention when sent together with Quietelement or receive QuietChannelelement and APQuietMode equals 0 time, the NAV of AP and indirectly connected VHTnon-APSTA is re-set as quiet interval duration, the present invention can prevent AP and indirectly connected VHTnon-APSTA in quiet period because NAV is reduced to 0 and the invalid channel competition caused, so it has the correct advantage of channel competition.
Accompanying drawing explanation
Fig. 1 is the concrete form schematic diagram of Quietelement in prior art;
Fig. 2 is the concrete form schematic diagram of QuietChannelelement in prior art;
Fig. 3 is the flow chart of the method to set up of a kind of quiet period network allocation vector that the specific embodiment of the invention provides;
Fig. 4 is the flow chart of the method to set up of a kind of quiet period network allocation vector provided in addition that the specific embodiment of the invention provides;
The structure chart of the setting device of a kind of quiet period network allocation vector that Fig. 5 provides for the specific embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention also provides a kind of method to set up of quiet period network allocation vector, the method is completed by AP or indirectly connected VHTnon-APSTAs, it should be noted that AP or indirectly connected VHTnon-APSTAs can perform S31 and S32 simultaneously, also can perform respectively, the method as shown in Figure 3, comprising:
S31, when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
It should be noted that, whether the above-mentioned QuietChannelelement of judgement sent or received together together with Quietelement specifically can comprise:
Judge that whether QuietChannelelement sent with Quietelement or received together together with in same frame.This frame is specifically as follows: a beacon frame (Beaconframe) or a probing response frame (ProbeResponseframe)
It should be noted that, whether above-mentioned QuietChannelelement sent or received together together with Quietelement specifically comprises: whether QuietChannelelement and Quietelement sends or receive in a Beaconframe or ProbeResponseframe.
S32, when judged result is for being, network allocation vector NAV is set to Quietelement set up quiet interval duration.
Method provided by the invention make when sent together with Quietelement or receive QuietChannelelement and APQuietMode equals 0 time, the NAV of AP and indirectly connected VHTnon-APSTA is re-set as quiet interval duration, and the present invention can prevent AP and indirectly connected VHTnon-APSTA in quiet period because NAV is reduced to 0 and the invalid channel competition caused.
The method to set up of a kind of quiet period network allocation vector provided is provided, the method is completed by AP or VHTnon-APSTAs, it should be noted that AP or VHTnon-APSTAs can perform S41 and S42 simultaneously, also can perform respectively, the method as shown in Figure 4, comprising:
S41, when quiet interval starts, judge whether silent channel element QuietChannelelemen sent or received t together together with the element Quietelement that mourns in silence;
S42, judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
Optionally, said method can also comprise: when judged result is no, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
In addition, it should be noted that, concrete meaning or the definition of above-mentioned Quietelement, QuietChannelelement and quiet interval see the associated description of 802.11ac, can not repeat here.
Method provided by the invention make when sent together with Quietelement or receive QuietChannelelement together and APQuietMode equals 1 time, NAV is set to 0 or constant, so VHTSTAs can competitive channel in quiet period, make full use of channel resource.
Further aspect, the specific embodiment of the invention provides a kind of setting device of quiet period network allocation vector, and as shown in Figure 5, this device comprises this device:
Judging unit 51, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Network allocation vector setting unit 52, for judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant;
Optionally, above-mentioned network allocation vector setting unit 52 can also be used for when judging unit 51 judged result is no, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
Device provided by the invention make when sent together with Quietelement or receive QuietChannelelement together and APQuietMode equals 1 time, NAV is set to 0 or constant, described device can competitive channel in quiet period, makes full use of channel resource.
On the other hand, the specific embodiment of the invention also provides a kind of setting device of quiet period network allocation vector, and as shown in Figure 5, this device comprises this device:
Judging unit 51, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
Network allocation vector setting unit 52, for when judged result is for being, is set to the quiet interval duration that Quietelement sets up by network allocation vector NAV.
Device provided by the invention make when sent together with Quietelement or receive QuietChannelelement together and APQuietMode equals 0 time, the NAV of described device is re-set as quiet interval duration, and the present invention can prevent described device in quiet period because NAV is reduced to 0 and the invalid channel competition caused.
What the present invention also provided a kind of quiet period network allocation vector arranges system, and this system comprises:
AP and VHTnon-APSTAs;
Wherein, described AP, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant;
Optionally, described AP, time also for being no in judged result, is set to the quiet interval duration that Quietelement sets up by network allocation vector NAV;
Described VHTnon-APSTAs, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant;
Optionally, described VHTnon-APSTAs, time also for being no in judged result, is set to the quiet interval duration that Quietelement sets up by network allocation vector NAV.
What the present invention also provided a kind of quiet period network allocation vector arranges system, and described system comprises:
AP and indirectly connected VHTnon-APSTAs;
Wherein, described AP, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up;
Described indirectly connected VHTnon-APSTAs, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
In said units and system embodiment, included modules or unit just carry out dividing according to function logic, but are not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional module, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
It will be understood by those skilled in the art that all or part of step of technical scheme that the embodiment of the present invention provides can have been come by the hardware that program command is relevant.Such as can be come by computer run journey.This program can be stored in read/write memory medium, such as, and random asccess memory, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a method to set up for quiet period network allocation vector, is characterized in that, described method comprises:
When quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, in described QuietChannelelement, access point AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
2. method according to claim 1, is characterized in that, whether the described QuietChannelelement of judgement sent or received together together with Quietelement specifically comprises:
Judge that whether QuietChannelelement sent with Quietelement or received together together with in same frame.
3. a method to set up for quiet period network allocation vector, is characterized in that, described method comprises:
When quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, access point AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
4. method according to claim 3, is characterized in that, whether the described QuietChannelelement of judgement sent or received together together with Quietelement specifically comprises:
Judge that whether QuietChannelelement sent with Quietelement or received together together with in same frame.
5. method according to claim 3, is characterized in that, described method also comprises:
When judged result is no, NAV is set to the quiet interval duration that Quietelement sets up.
6. a setting device for quiet period network allocation vector, is characterized in that, described device comprises:
Judging unit, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, in described QuietChannelelement, access point AP silent mode APQuietMode equals 0;
Network allocation vector setting unit, for when judged result is for being, is set to the quiet interval duration that Quietelement sets up by network allocation vector NAV.
7. device according to claim 6, is characterized in that, whether the described QuietChannelelement of judgement sent or received together together with Quietelement specifically comprises:
Judge that whether QuietChannelelement sent with Quietelement or received together together with in same frame.
8. a setting device for quiet period network allocation vector, is characterized in that, described device comprises:
Judging unit, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Network allocation vector setting unit, for described judging unit judged result for be and in QuietChannelelement, access point AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
9. want the device described in 8 according to right, it is characterized in that, whether the described QuietChannelelement of judgement sent or received together together with Quietelement specifically comprises:
Judge that whether QuietChannelelement sent with Quietelement or received together together with in same frame.
10. device according to claim 8, is characterized in that, NAV, also for when described judging unit judged result is no, is set to the quiet interval duration that Quietelement sets up by described network allocation vector setting unit.
11. 1 kinds of quiet period network allocation vectors system is set, it is characterized in that, described system comprises:
Access point AP and indirectly connected superelevation throughput non-ap stations point VHTnon-APSTAs;
Wherein, described AP, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up;
Described indirectly connected VHTnon-APSTAs, for when quiet interval starts, judge whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence, and in described QuietChannelelement, AP silent mode APQuietMode equals 0;
When judged result is for being, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
12. 1 kinds of quiet period network allocation vectors system is set, it is characterized in that, described system comprises:
Access point AP and superelevation throughput non-ap stations point VHTnon-APSTAs;
Wherein, described AP, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant;
Described VHTnon-APSTAs, for when quiet interval starts, judges whether silent channel element QuietChannelelement sent or received together together with the element Quietelement that mourns in silence;
Judged result for be and in QuietChannelelement, AP silent mode APQuietMode equals 1 time, network allocation vector NAV is set to 0 or constant.
13. systems according to claim 12, is characterized in that, when described AP is specifically also for being no in judged result, network allocation vector NAV are set to the quiet interval duration that Quietelement sets up;
When described VHTnon-APSTAs is specifically also for being no in judged result, network allocation vector NAV is set to the quiet interval duration that Quietelement sets up.
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| CN201210011365.5A CN103209465B (en) | 2012-01-13 | 2012-01-13 | The method to set up of quiet period network allocation vector, Apparatus and system |
| PCT/CN2013/070213 WO2013104297A1 (en) | 2012-01-13 | 2013-01-08 | Method, device and system for setting network allocation vector in quiet period |
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| CN201210011365.5A CN103209465B (en) | 2012-01-13 | 2012-01-13 | The method to set up of quiet period network allocation vector, Apparatus and system |
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| US7620405B2 (en) * | 2002-03-08 | 2009-11-17 | Koninklijke Philips Electronics N.V. | Method and system for providing a single unified channel quieting/measurement request element in an 802.11 wireless local area network |
| US7864796B1 (en) * | 2005-04-04 | 2011-01-04 | Avaya Inc. | Start-to-finish reservations in distributed MAC protocols for wireless LANs |
| US8179873B2 (en) * | 2008-10-14 | 2012-05-15 | Motorola Solutions, Inc. | Method to quite consecutive narrow band channels |
| WO2010098519A1 (en) * | 2009-02-24 | 2010-09-02 | Lg Electronics Inc. | Method of limiting transmission rate |
| CN102026297B (en) * | 2009-09-18 | 2013-11-06 | 华为技术有限公司 | Method, system and node for channel negotiation |
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| CN102265668A (en) * | 2008-12-22 | 2011-11-30 | Lg电子株式会社 | Procedure for basic service set (bss) load management in wlan system |
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