CN103379595B - In WLAN (wireless local area network), STA obtains method, the Apparatus and system of data - Google Patents

In WLAN (wireless local area network), STA obtains method, the Apparatus and system of data Download PDF

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Publication number
CN103379595B
CN103379595B CN201210132619.9A CN201210132619A CN103379595B CN 103379595 B CN103379595 B CN 103379595B CN 201210132619 A CN201210132619 A CN 201210132619A CN 103379595 B CN103379595 B CN 103379595B
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sta
data
beacon
listeninterval
identification information
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CN103379595A (en
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赵牧
姜艳平
甄斌
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Global Innovation Polymerization LLC
Gw Partnership Co ltd
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Huawei Technologies Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the present invention provides STA in a kind of WLAN (wireless local area network) to obtain the method for data, comprise: if described AP has data to need to send to described STA, according to communication capacity and the network condition of described AP, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described AP.Correspondingly, the embodiment of the present invention also provides a kind of subscriber equipment and communication system, by above technical scheme, AP can according to himself ability, in specific beacon, optionally notify that specific STA obtains data, to coordinate the channel service time of multiple or many groups STA, enable STA from AP, obtain data in an orderly manner in time, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, more reasonably make use of channel.

Description

In WLAN (wireless local area network), STA obtains method, the Apparatus and system of data
Technical field
The present invention relates to communication technical field, particularly relate to STA in WLAN (wireless local area network) and obtain method, the Apparatus and system of data.
Background technology
At WLAN (WirelessLocalAreaNetworks, WLAN) in, because STA is (Station, wireless site) be generally powered battery, energy constraint, MAC (MediumAccessControl, media are got involved and controlled) the layer detail specification of IEEE802.11 definition defines battery saving mode, allows STA to be operated in " wake states " or " sleep state ".AP (AccessPoint, access point) according to BI (BeaconInterval, beacon interval) periodic broadcast Beacon (beacon), work STA is in a power-save mode according to ListenInterval periodic receipt beacon, wherein, beacon is a kind of management frames for notifying some customizing messages of STA, ListenInterval is an integer being more than or equal to zero in a standard, meaning be STA periodic receipt adjacent two beacons between have ListenInterval BeaconInterval.
In existing 802.11 standards, can identify the ListenInterval value of oneself when STA with AP associates in association request, STA selectively receives beacon according to ListenInterval.When AP has the data that will be handed down to STA, this message identification at TIM (TrafficIndicationMap, traffic indication map) to broadcast, after STA receives the TIM including this information, according to standard regulation acquisition number certificate, wherein, TIM be AP for notifying that this AP of STA is cached with to a kind of information element of the data of this STA, generally comprise in a beacon.
In the network having a large amount of STA, because channel competition is fierce, although AP identifies to the data of STA in the beacon of STA periodic receipt, but in the BI of this beacon, the STA that AP issues data or competition uploading data will to too much STA is too much, this STA is caused to fail in this BI, to compete channel to obtain data, then this STA can be in the time of the active even more than one BI of competitive channel state always, STA is caused to consume comparatively multi-energy, simultaneously, for the STA that ListenInterval is very large, above scheme may cause AP in time data can not be sent to STA.
Summary of the invention
Method, subscriber equipment and communication system that the embodiment of the present invention provides STA in a kind of WLAN (wireless local area network) to obtain data, to make the STA worked in WLAN (wireless local area network) in a power-save mode, can with more in time, the mode of more power saving obtains data.
The embodiment of the present invention provides site STA in a kind of WLAN (wireless local area network) to obtain the method for data, obtains data, comprising for STA from the access point AP that it accesses:
AP periodically sends beacon to described STA, and the time interval between two that send adjacent beacons is beacon interval BI, and described beacon is that described AP is for notifying a kind of management frames of described STA customizing messages;
If described AP has data to need to send to described STA, according to communication capacity and the network condition of described AP, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described AP.
The embodiment of the present invention also provides a kind of subscriber equipment, and in a wireless local area network, it is characterized in that, comprising: memory, processing unit and antenna, described memory is connected with described processing unit by bus system with antenna in application, wherein,
Described antenna, site STA periodically to the described subscriber equipment of access sends beacon, and the time interval between two the adjacent beacons sent is beacon interval BI, described beacon is that described subscriber equipment is for notifying a kind of management frames of described STA customizing messages;
Described memory, will be addressed to the data of described STA for buffer memory;
Described processing unit, during for having data to need to send to described STA at described subscriber equipment, according to communication capacity and the network condition of described subscriber equipment, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described subscriber equipment.
The embodiment of the present invention also provides a kind of communication system, comprising: above-mentioned subscriber equipment, and at least one site STA, and at least one STA described is connected with described communications of user equipment.
The embodiment of the present invention is by above technical scheme, when AP has data will be handed down to STA, AP is according to the communication capacity of self and network condition, in specific beacon, optionally notify that specific STA obtains data, to coordinate the channel service time of multiple or many groups STA, STA is enable from AP, to obtain data in an orderly manner in time, such STA carrys out competitive channel to obtain data with regard to not needing the long period to be in active state, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, also make use of channel more rationally and effectively.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The network topological diagram of the network system that Fig. 1 provides for the embodiment of the present invention;
In the WLAN (wireless local area network) that Fig. 2 provides for the embodiment of the present invention, STA obtains the method flow diagram of data;
In the WLAN (wireless local area network) that Fig. 3 provides for another embodiment of the present invention, STA obtains the method flow diagram of data;
The process schematic of AP and the STA association that Fig. 4 provides for the embodiment of the present invention;
The process schematic of AP and the STA re-association that Fig. 5 provides for the embodiment of the present invention;
The second identification information exemplary plot in the beacon that Fig. 6 provides for the embodiment of the present invention;
In the WLAN (wireless local area network) that Fig. 7 provides for the embodiment of the present invention, STA obtains the method schematic diagram of data;
In the another kind of WLAN (wireless local area network) that Fig. 8 provides for the embodiment of the present invention, STA obtains the method flow diagram of data;
In the another kind of WLAN (wireless local area network) that Fig. 9 provides for the embodiment of the present invention, STA obtains the method schematic diagram of data;
The second identification information schematic diagram in the beacon that Figure 10 provides for another embodiment of the present invention;
The structure chart of the subscriber equipment that Figure 11 provides for the embodiment of the present invention;
The communication system schematic diagram that Figure 12 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one, the embodiment of the present invention one provides STA in a kind of WLAN (wireless local area network) to obtain the method for data, obtains data for the STA in WLAN (wireless local area network) from its AP accessed.Figure 1 shows that the typical network topology structure chart of application technical solution of the present invention, according to Fig. 1, WLAN (wireless local area network) 100 comprises: access point (AP, AccessPoint) 120, and pass through the website (STA of access point 120 access network, Station) 110-115, the STA110-115 be associated with under same AP120 form a Basic Service Set (BSS); WLAN (wireless local area network) 100 accesses backbone network 140 by gateway 130, and then is connected to the server in network.
It should be noted that, STA in the embodiment of the present invention refers to the basic logic entity in WLAN (wireless local area network), STA is specifically as follows the terminal equipment comprising wireless lan interfaces, as many mobile phones, panel computer etc. all support wireless lan interfaces in the market, portable machine is built-in wireless lan interfaces also.Some are not possessed itself to the equipment of wireless lan interfaces, wireless lan interfaces can be provided by the mode of installing WLAN wireless network card for it.
Figure 2 shows that in the WLAN (wireless local area network) that the embodiment of the present invention provides, STA obtains the method flow diagram of data, according to Fig. 2, the method comprises:
Step 201, AP periodically sends beacon to described STA, and the time interval between two that send adjacent beacons is beacon interval BI;
It should be noted that, IEEE802.11 agreement defines the mechanism of energy management (powermanagement) in MAC layer, proposition utilizes node at active mode (activemode) and energy saver mode (powersavemode, PSM) State Transferring between carrys out the consumption of overall minimizing energy, thus extends the service time of battery.According to the description of IEEE802.11 agreement, in the power-saving mechanism that the time drives, time shaft is divided into continuous print BI (BeaconInterval, beacon interval), AP (AccessPoint, access point) is according to BI periodic broadcast Beacon (beacon), and work STA is in a power-save mode according to ListenInterval periodic receipt beacon, wherein, beacon is a kind of management frames for notifying some customizing messages of STA.
Step 202, if described AP has data to need to send to described STA, according to communication capacity and the network condition of described AP, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described AP.
Particularly, in one embodiment, AP can according to the communication capacity of self, and the situation of current network, the data of the STA of own cache is evenly arranged in one or more BI and is handed down to corresponding STA.It should be noted that, the communication capacity of AP includes but not limited to: the storage size of AP, the data volume of current storage, AP send the speed etc. of data.In one embodiment, suppose that the next beacon that described STA receives is beacon a, AP is by identifying the TIM in beacon a, or in beacon a, add corresponding identification information (such as identifying with STAID), and broadcast, to notify described STA, in the BI of other beacon after the BI or beacon a of beacon a, obtain data from AP; Wherein, TIM is included in a kind of data structure (information element) in beacon, for notifying that this AP of STA is cached with to the data of this STA.After STA receives the beacon including data identification information, according to standard regulation acquisition number certificate.In one embodiment, STA obtains corresponding data by the mode sending PSPoll frame, and wherein PSPoll frame is a kind of control frame specified in 802.11 agreements, and the STA for being in battery saving mode asks AP to be sent as the Frame of this STA buffer memory; In another embodiment, corresponding data also initiatively can be issued STA by AP in the BI of beacon a.
The embodiment of the present invention is by above technical scheme, when AP has data will be handed down to STA, AP is according to the communication capacity of self and network condition, in specific beacon, optionally notify that specific STA obtains data, to coordinate the channel service time of multiple or many groups STA, STA is enable from AP, to obtain data in an orderly manner in time, such STA carrys out competitive channel to obtain data with regard to not needing the long period to be in active state, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, also make use of channel more rationally and effectively.
Further, in the enforcement more specifically that the embodiment of the present invention provides, as shown in Figure 3, in the WLAN (wireless local area network) that the embodiment of the present invention provides, the method for STA acquisition data comprises:
Step 301, AP periodically sends beacon to the STA that communicates to connect with it, and the time interval between two that send adjacent beacons is beacon interval BI, and described beacon is that described AP is for notifying a kind of management frames of each STA customizing messages described;
Step 302, when AP have data need be handed down to be in dormant STA time, determine described STA wake up from sleep state after receive next beacon a;
Particularly, AP can determine according to the ListenInterval value of described STA the next beacon a that described STA receives; Wherein, described ListenInterval value represents the number of the beacon interval BeaconInterval between adjacent two beacons of described STA periodic receipt;
It should be noted that, according to the above-mentioned description to STA battery saving mode, only wake a period of time up in particular moment monitors Beacon or interactive information to STA, all the other times are all in sleep state, in existing IEEE802.11 agreement, the time that STA once sleeps, determine according to its ListenInterval value, ListenInterval is an integer being more than or equal to zero in IEEE802.11 agreement, meaning is the number of the beacon interval BeaconInterval between adjacent two beacons of STA periodic receipt, ListenInterval BI is had between adjacent two beacons of i.e. STA periodic receipt, such as, the ListenInterval of a certain STA is 10, and just represent, this STA, after reception beacon, wakes up after 10 BI that sleeps, then connects and search next beacon, and that is, this STA sleep time is once the time span of 10 BI, like this, as long as be aware of the ListenInterval value of STA, the next beacon a that this STA receives just can be determined.
In one embodiment, the ListenInterval value of STA can be by using the user of this STA to carry out static configuration, in the application scenarios of 802.11ah, generally all include 6000+ work STA in a power-save mode, therefore the setting of ListenInterval should be the bigger the better; In another embodiment, STA also can adjust ListenInterval value according to the condition preset, the condition preset mentioned here, it can be the electricity of the current battery of STA, such as, if the current electricity of STA is lower, ListenInterval value can suitably be increased; The condition preset can also be current network condition or network parameter.
Alternatively, in another embodiment, before step 302, also comprise:
Step 301a, STA, when associating with AP, identify the ListenInterval value of oneself, preserve its ListenInterval value to make AP in association request.
By this step, STA is in the process associated with AP, self pre-configured ListenInterval value is reported AP to store, such AP, when transmission data, just can utilize this ListenInterval value to determine the next beacon a that this STA receives.
Alternatively, in another embodiment, AP can also redistribute ListenInterval value for STA, particularly, before step 302, also comprises:
Step 301b, AP with the association process of STA in distribute to this STA ListenInterval value, substitute oneself original ListenInterval value to make this ListenInterval value of this STA.
Particularly, the specific implementation process of step 301b as shown in Figure 4, in the process that AP associates with it at STA, receive the association request AssociationRequest that STA sends, then the ListenInterval value distributing to STA is placed on and asks to notify STA in corresponding AssociationResponseframe with associating, after STA receives, namely substitute oneself original ListenInterval value by this ListenInterval value.
Further, as shown in Figure 5, AP, in the process of STA and its re-association, if necessary, also can be placed on the ListenInterval value upgraded in ReassociationResponseframe and notify STA.After STA receives, namely substitute oneself original ListenInterval value by this ListenInterval value.
Step 303, AP, according to its buffer data size, data transmission rate, BI length, determines in beacon a, whether notify there are its data in AP described in described STA.
In one embodiment, the data of the STA of own cache evenly can be arranged in one or more BI and be handed down to corresponding STA by AP.Particularly, when AP has data to need to send to a certain STA, AP is according to the length of the data volume size of self current cache, data transmission rate and BI, judge that can the data of current cache all send in a BI, if the data of current cache all can send in a BI, then determine from the next beacon a received after sleep state is waken up, to notify have its data in AP described in this STA at this STA; If the data of current cache all can not be sent in a BI, then determine in beacon a, do not notify there are its data in AP described in this STA.
For ease of better understanding and implement the such scheme of the embodiment of the present invention, below further by the mode of citing, set forth step 303 handling process of the embodiment of the present invention.Suppose that AP is current and have received from server or third party the data that a certain STA (being assumed to be A) is mail in preparation, size is 100kb, then by this data buffer storage, and add up the size (being assumed to be 5M) of the data volume of self current buffer memory, then according to data transmission rate (supposing 2M/s), and the length of BI (being assumed to be 2s), can judge by calculating, the data of current cache all can not be sent in a BI, AP can determine from the next beacon a received after sleep state is waken up, not notify have its data in AP described in this STA at this STA thus, like this, A is after being waken up from current sleep state, its message identification is not had due in the beacon a that receives, therefore sleep or power down mode can be proceeded to immediately, notify that it receives the next beacon of data until receive, like this, by the reasonable prediction based on buffer data size, can reasonably allocated channel, avoid occurring that AP will issue the STA of data or competition uploading data to too much STA simultaneously too much, STA is caused to fail in a BI, to compete channel to obtain data, thus the time of the active even more than one BI of competitive channel state can be in always, STA is caused to consume comparatively multi-energy.
It should be noted that, the embodiment of the present invention is by AP buffer data size, data transmission rate and BI length are as the factor determining whether to notify to consider when having its data in AP described in described STA in beacon a, be understandable that AP buffer data size, data transmission rate and BI length three itself and are not formed restriction to the present invention program, be understandable that, in other embodiments, can also by other relevant parameters, such as channel quality, access the number of the STA of described AP etc. as the Consideration determining whether to notify in beacon a when having its data in AP described in described STA, just repeat no more herein.
Step 304, if so, then AP increases by the first identification information in beacon a, to make this STA after receiving beacon a, in the BI of beacon a, obtains data from described AP;
Particularly, in one embodiment, AP is by identifying the TIM in beacon a, as the first identification information added, or in beacon a, add the customizing messages (such as identifying with STAID) of STA, as the first identification information, and broadcast, to notify described STA, in the BI of beacon a, obtain data from AP.
In one embodiment, STA obtains corresponding data by the mode sending PSPoll frame, and wherein PSPoll frame is a kind of control frame specified in 802.11 agreements, and the STA for being in battery saving mode asks AP to be sent as the Frame of this STA buffer memory; In another embodiment, corresponding data also initiatively can be issued STA by AP in the BI of beacon a.
Further, in the WLAN (wireless local area network) that the embodiment of the present invention provides, STA obtains the method for data, also comprises:
Step 305, if not, AP selects another beacon (hereafter referring to this beacon with beacon b) after beacon a, and increases by the second identification information in beacon a, and to notify this STA, it receives data in the BI of beacon b;
Particularly, in one embodiment, the beacon b that AP selects can be the arbitrary beacon after beacon a.
It should be noted that, in an optimum embodiment of invention, AP according to its buffer data size, data transmission rate, BI length, can select the N number of beacon after beacon a, as beacon b, and 1 <=N < ListenInterval; Namely beacon b is at beacon a with apart from the beacon between the beacon after beacon aListenInterval value, and namely beacon b to wake up according to ListenInterval value periodicity and between two the adjacent beacons received at STA.Particularly, AP can estimate according to its buffer data size, data transmission rate, BI length the data mailing to this STA, can be sent by which the beacon BI after the BI of beacon a, thus determine beacon b by disposable.After AP chooses beacon b, in beacon a, add the second identification information, receive for notifying that STA is allowed to condition in the BI of beacon b or obtain data, when STA wakes up and receives beacon a, this information can be obtained.Particularly, in one embodiment, as the second identification information example that Fig. 6 is in beacon a, beacon a can carry within a beacon frame as a kind of information element (InformationElement) using this second identification information, receive in the BI of beacon b to point out STA or obtain data, according to Fig. 6, in the second identification information, include the mark of STA and digital N, to notify that STA N number of BI after beacon a of the STA mark correspondence in beacon a receives or obtain data; STAID can be that AID etc. can unique identification STA.
STA receives beacon a and after obtaining this information, can proceed to sleep or power down mode immediately.Then STA obtains corresponding data, particularly, according to Fig. 7 by following two kinds of modes:
First kind of way: as shown in (a) in Fig. 7, STA can keep sleep or power down mode until the airtime of beacon b wake up again and receive beacon b, mode by sending PS-Poll frame in the BI of beacon b obtains corresponding data, or as shown in Fig. 7 (b), corresponding data is initiatively issued STA by AP in this BI.Wherein to comprise in beacon b to identify and have the TIM being handed down to STA data.
The second way: as shown in Fig. 7 (c), STA can keep sleep or power down mode until beacon b wakes up after having broadcasted, mode directly by sending PS-Poll frame in the BI of beacon b obtains corresponding data, or corresponding data is initiatively issued STA by AP in this BI.
After STA obtains corresponding data, can proceed to sleep or power down mode immediately, until wake up apart from the beacon after beacon aListenInterval value and receive this beacon, namely STA periodically wakes up by ListenInterval value and receives beacon.
It should be noted that, in embodiments of the present invention, can no longer add any data identification information in beacon b, to notify that described STA obtains data in the BI of beacon b, it is appreciated of course that, also can be the same with beacon a, again in beacon b, add the first identification information.
The embodiment of the present invention is by above technical scheme, when AP has data will be handed down to STA, AP is according to the communication capacity of self and network condition, in specific beacon, optionally notify that specific STA obtains data, to coordinate the channel service time of multiple or many groups STA, STA is enable from AP, to obtain data in an orderly manner in time, such STA carrys out competitive channel to obtain data with regard to not needing the long period to be in active state, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, also make use of channel more rationally and effectively.
The embodiment of the present invention also provides STA in another kind of WLAN (wireless local area network) to obtain the method for data, and from its AP accessed, obtain data for STA, the method can be used in the network system shown in Fig. 1 equally.
When the STA number ratio existed in WLAN (wireless local area network) is huger, the method that the embodiment of the present invention provides, first can divide into groups all or part of STA associated with AP according to certain rule.One group of STA (Group) has identical ListenInterval value.Based on this prerequisite, as shown in Figure 8, the method that the embodiment of the present invention provides also comprises:
Step 801, AP periodically sends beacon to each STA in each Group communicated to connect with it, and the time interval between two the adjacent beacons sent is beacon interval BI, described beacon is that described AP is for notifying a kind of management frames of each STA customizing messages described;
Step 802, when AP has data will be handed down to Group, determines that this Group wakes up and the nearest next beacon (hereafter referring to this beacon with beacon a) received.
Particularly, AP can determine according to the ListenInterval value of described STA the next beacon a that described STA receives; Wherein, described ListenInterval value represents the number of the beacon interval BeaconInterval between adjacent two beacons of described STA periodic receipt.
Step 803, AP, according to its buffer data size, data transmission rate and BI length, determines in beacon a, whether notify that this Group is to obtain corresponding data (described corresponding data is the unicast data of AP to STA).
In one embodiment, the data of each Group of own cache evenly can be arranged in one or more BI and be handed down to corresponding Group by AP.Particularly, when AP has data to need to send to a certain Group, AP is according to the length of the data volume size of self current cache, data transmission rate and BI, judge that can the data of current cache all send in a BI, if the data of current cache all can send in a BI, then determine from the next beacon a received after sleep state is waken up, to notify have its data in AP described in this Group at this Group; If the data of current cache all can not be sent in a BI, then determine in beacon a, do not notify there are its data in AP described in this Group.
Step 804, if, AP notifies that in beacon a this Group has corresponding data, to wake up and after receiving beacon a to make the STA in this Group, mode by sending PS-Poll frame in the BI of beacon a obtains corresponding data, or corresponding data is initiatively issued the STA in this Group by AP in the BI of beacon a.
It should be noted that, AP by identifying the TIM in beacon a, or identifies with GroupID in beacon a, notifies that Group has corresponding data.
Further, the method that the embodiment of the present invention provides, also comprises:
Step 805, if not, AP selects another beacon (hereafter referring to this beacon with beacon b) after beacon a, and in beacon a, notifies that this Group is allowed to condition in the BI of beacon b receive data.
In one embodiment, the beacon b that AP selects can be the arbitrary beacon after beacon a.
In an optimum embodiment of invention, AP according to its buffer data size, data transmission rate, BI length, can select the N number of beacon after beacon a, as beacon b, and 1 <=N < ListenInterval; Namely beacon b must be at beacon a with apart from the beacon between the beacon after beacon aListenInterval value, and namely beacon b to wake up according to ListenInterval value periodicity and between two the adjacent beacons received at this Group.After AP chooses beacon b, in beacon a, notify that this Group is allowed to condition in the BI of beacon b receive or obtain data, beacon a can carry within a beacon frame as a kind of information element (InformationElement) using this information, when STA wakes up and receives beacon a, this information can be obtained.
STA receives beacon a and after obtaining this information, can proceed to sleep or power down mode immediately.Then STA obtains corresponding data by following two kinds of modes, particularly, according to Fig. 9, supposes that STA1, STA2 form a Group:
First kind of way: as shown in (a) in Fig. 9, STA1, STA2 in Group can keep sleep or power down mode until the airtime of beacon b wake up again and receive beacon b, STA1, STA2 in Group obtain corresponding data by the mode sending PS-Poll frame in the BI of beacon b, or corresponding data is initiatively issued the STA of Group by AP in this BI.
The second way: as shown in Fig. 9 (b), Group can keep sleep or power down mode until beacon b wakes up after having broadcasted, mode directly by sending PS-Poll frame in the BI of beacon b obtains corresponding data, or corresponding data is initiatively issued the STA of Group by AP in this BI.
It should be noted that, as long as the group that AP is notified of STA itself or its place obtains data in the BI of beacon b, STA will wake up at this BI and obtain corresponding data.If the group that AP is notified of its place of STA obtains data in the BI of beacon b, but in fact AP does not have data and will be handed down to this STA, and this STA also will wake up and attempt obtaining data.With regard to the present embodiment, can in beacon a, add the second identification information, notify that the group at STA itself or its place obtains data in the BI of beacon b, as shown in Figure 10, second identification information may identify each STA (as with TIM) having data to issue in Group respectively, also GroupID (as with TIM) unifying identifier one group of STA may be used, left figure in Figure 10 is the second identification information example one in beacon a, is meant to AP and notifies that Group n-th BI after beacon a receives or obtains data; Right figure in Figure 10 is the second identification information example two in beacon a, is meant to AP and notifies that STA1, the 3 and 6 N number of BI after beacon a in Group receives or obtains data.Not necessarily carry GroupID herein.
After the STA acquisition corresponding data of Group, can proceed to sleep or power down mode immediately, until wake up apart from the beacon after beacon aListenInterval value and receive this beacon, namely Group periodically wakes up and the beacon received by ListenInterval value.
Also it should be noted that, the method that AP can provide by the embodiment of the present invention processes simultaneously organizes STA more, or processes one or more groups STA and/or one or more STA simultaneously.
The embodiment of the present invention is by above technical scheme, when AP has data will be handed down to the Group of specific STA formation, AP is according to the communication capacity of self and network condition, in specific beacon, optionally notify that specific Group obtains data, to coordinate the channel service time of multiple or many groups STA, STA is enable from AP, to obtain data in an orderly manner in time, such STA carrys out competitive channel to obtain data with regard to not needing the long period to be in active state, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, also make use of channel more rationally and effectively.
The embodiment of the present invention provides the device embodiment realizing each step and method in said method embodiment further.The embodiment of the present invention can be applicable in various communication system, especially can adapt to network system as shown in Figure 1.Figure 11 shows a kind of structure chart of subscriber equipment, and according to Figure 11, subscriber equipment 10 comprises: processing unit 101, memory 102 and antenna 103.Processing unit 101 controls the operation of subscriber equipment 10, and processing unit 101 can also be called CPU.Memory 102 can comprise read-only memory and random access memory, for providing instruction and data to processing unit 306.A part for memory 102 can also comprise non-volatile row random access memory (NVRAM).In concrete application, subscriber equipment 10 can embed or itself can be exactly the Wireless Telecom Equipment of such as WAP (wireless access point), WiFI focus or wireless router and so on.Each assembly of subscriber equipment 10 is coupled by bus system 100, and wherein bus system is except comprising data/address bus, also comprises power bus, control bus and status signal bus in addition.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus system 100.
The STA that the embodiment of the present invention discloses obtains the method for data and can be applied in the subscriber equipment 10 that the present embodiment provides, and is realized in other words by subscriber equipment 10.In implementation procedure, each step of said method can be completed by the instruction of the integrated logic circuit of the hardware of subscriber equipment 10 or software form.These instructions can be realized to coordinate and control by the processing unit 101 of subscriber equipment 10.For performing the method that the embodiment of the present invention one, two discloses, processing unit 101 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components.
Particularly, in the subscriber equipment 10 that the embodiment of the present invention three provides, antenna 103 is periodically to communicate to connect with subscriber equipment 10 and each STA worked in a power-save mode sends beacon, wherein, beacon is a kind of management frames for notifying some customizing messages of STA, the time interval between two adjacent beacons that antenna 103 sends is BI (BeaconInterval, beacon slot), work STA is in a power-save mode according to ListenInterval periodic receipt beacon, ListenInterval is an integer being more than or equal to zero in a standard, meaning be STA periodic receipt adjacent two beacons between have ListenInterval BI,
Memory 102 for, will the data of described STA be addressed to for buffer memory;
Processing unit 101, during for having data to need to send to described STA at subscriber equipment 10, according to communication capacity and the network condition of subscriber equipment 10 self, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described subscriber equipment.
It should be noted that, the specific works flow process of processing unit 101 can see the step 202 of the embodiment of the present invention, and step 302-305, and step 802-705, repeat no more herein.
Particularly, processing unit 101, according to the data transmission rate of the data volume in memory 102, antenna 103 and BI length, increases data identification information in the next beacon that described STA receives.
In one embodiment, when processing unit 101 is according to the data transmission rate of the data volume in memory 102, antenna 103 and BI length, when judging that the data of current own cache all can send in a BI, in the next beacon (hereafter referring to this beacon with beacon a) that described STA receives, increase by the first identification information, to indicate described STA in the BI of described next beacon, obtain data from described AP.
In another embodiment, when processing unit 101 tool is according to the data volume in memory 102, the data transmission rate of antenna 103 and BI length, when judging that the data of current own cache all can not send in a BI, in the next beacon that described STA receives, increase by the second identification information, to indicate described STA after receiving described next beacon, keep sleep state until airtime of another beacon (hereafter referring to this beacon with beacon b) of described next beacon or the broadcast of another beacon described are waken up after completing again, and in the BI of another beacon described, obtain corresponding data.
It should be noted that, in one embodiment, processing unit 101 can select the arbitrary beacon after beacon a as beacon b.
It should be noted that, in an optimum embodiment of invention, processing unit 101 can according to the data transmission rate of the data volume in memory 102, antenna 103 and BI length, select the N number of beacon after beacon a, as beacon b, and 1 <=N < ListenInterval; Namely beacon b is at beacon a with apart from the beacon between the beacon after beacon aListenInterval value, and namely beacon b to wake up according to ListenInterval value periodicity and between two the adjacent beacons received at STA.Particularly, processing unit 101 can estimate according to the data transmission rate of the data volume in memory 102, antenna 103 and BI length the data mailing to this STA, can be sent by disposable by which beacon BI after the BI of beacon a, thus determine beacon b.After AP chooses beacon b, in beacon a, add the second identification information, receive for notifying that STA is allowed to condition in the BI of beacon b or obtain data, when STA wakes up and receives beacon a, this information can be obtained.Particularly, in one embodiment, as the second identification information example that Fig. 6 is in beacon a, beacon a can carry within a beacon frame as a kind of information element (InformationElement) using this second identification information, receive in the BI of beacon b to point out STA or obtain data, according to Fig. 6, in the second identification information, include the mark of STA and digital N, to notify that STA N number of BI after beacon a of the STA mark correspondence in beacon a receives or obtain data; STAID can be that AID etc. can unique identification STA.
Further, in one embodiment, antenna 103 also for, receive described STA send association request; Correspondingly, processing unit 101 also for, distribute to described STA ListenInterval value, and the ListenInterval value distributing to described STA is added on asks in corresponding associate response message with described association, described STA is sent to by antenna 103, after receiving described associate response message to make described STA, substitute oneself original ListenInterval value by the ListenInterval value of described distribution.
The embodiment of the present invention is by above technical scheme, when subscriber equipment has data will be handed down to STA, subscriber equipment is according to the communication capacity of self and network condition, in specific beacon, optionally notify that specific STA obtains data, to coordinate the channel service time of multiple or many groups STA, STA is enable from AP, to obtain data in an orderly manner in time, such STA carrys out competitive channel to obtain data with regard to not needing the long period to be in active state, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, also make use of channel more rationally and effectively.
As shown in figure 12, the embodiment of the present invention also provides a kind of communication system, comprising: multiple STA (110-115 as in Figure 12) and access point 120;
Wherein, access point 120 can be the subscriber equipment 10 of the embodiment of the present invention three kinds; In one embodiment, STA (110-115 as in Figure 11) with as described in subscriber equipment associate time, oneself ListenInterval value can be identified in association request, preserve described ListenInterval value to make described subscriber equipment; In another embodiment, access point 120 also can with STA associate or distribute in re-association process this STA ListenInterval value, substitute oneself original ListenInterval value to make this ListenInterval value of this STA.
The embodiment of the present invention is by above technical scheme, when subscriber equipment has data will be handed down to STA, subscriber equipment is according to the communication capacity of self and network condition, in specific beacon, optionally notify that specific STA obtains data, to coordinate the channel service time of multiple or many groups STA, STA is enable from AP, to obtain data in an orderly manner in time, such STA carrys out competitive channel to obtain data with regard to not needing the long period to be in active state, thus reduce the energy ezpenditure that STA obtains data in a power-save mode, also make use of channel more rationally and effectively.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (10)

1. in WLAN (wireless local area network), site STA obtains a method for data, obtains data, it is characterized in that, comprising for STA from the access point AP that it accesses:
AP periodically sends beacon to described STA, and the time interval between two that send adjacent beacons is beacon interval BI, and described beacon is that described AP is for notifying a kind of management frames of described STA customizing messages;
If described AP has data to need to send to described STA, according to communication capacity and the network condition of described AP, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described AP;
According to communication capacity and the network condition of described AP, in the next beacon that described STA receives, increase data identification information, specifically comprise:
Described AP, according to its buffer data size, data transmission rate and BI length, increases data identification information in the next beacon that described STA receives;
Described AP, according to its buffer data size, data transmission rate and BI length, increases data identification information, specifically comprises in the next beacon that described STA receives:
If described AP is according to the length of the data volume size of self current cache, data transmission rate and BI, judge that the data of current own cache all can not send in a BI, increase by the second identification information in the next beacon then received at described STA, to indicate described STA after receiving described next beacon, keep sleep state until airtime of another beacon of described next beacon or the broadcast of another beacon described are waken up after completing again, and in the BI of another beacon described, obtain corresponding data.
2. the method for claim 1, is characterized in that, described AP, according to its buffer data size, data transmission rate and BI length, increases data identification information, specifically comprises in the next beacon that described STA receives:
If described AP is according to the length of the data volume size of self current cache, data transmission rate and BI, judge that the data of current own cache all can send in a BI, increase by the first identification information in the next beacon then received at described STA, to indicate described STA in the BI of described next beacon, obtain data from described AP.
3. the method for claim 1, it is characterized in that, another beacon described, be specially the N number of beacon after the next beacon that described STA receives, and 1<=N<ListenInterval, wherein ListenInterval is the number of the beacon interval BI between adjacent two beacons of described STA periodic receipt, and the value of N is determined according to its buffer data size, data transmission rate and BI length by described AP.
4. the method as described in any one of claim 1-3, it is characterized in that, also comprise: described AP receives the association request that described STA sends, the ListenInterval value distributing to described STA is added on asks in corresponding associate response message with described association, after receiving described associate response message to make described STA, substitute oneself original ListenInterval value by the ListenInterval value of described distribution.
5. a subscriber equipment, in a wireless local area network, it is characterized in that, comprising: memory, processing unit and antenna, described memory is connected with described processing unit by bus system with antenna in application, wherein,
Described antenna, site STA periodically to the described subscriber equipment of access sends beacon, and the time interval between two the adjacent beacons sent is beacon interval BI, described beacon is that described subscriber equipment is for notifying a kind of management frames of described STA customizing messages;
Described memory, will be addressed to the data of described STA for buffer memory;
Described processing unit, during for having data to need to send to described STA at described subscriber equipment, according to communication capacity and the network condition of described subscriber equipment, in the next beacon that described STA receives, increase data identification information, described data identification information is used to indicate described STA and obtains data from described subscriber equipment;
Described processing unit specifically for, according to data transmission rate and the BI length of the data volume in described memory, described antenna, in the next beacon that described STA receives, increase data identification information;
Described processing unit specifically for, according to data transmission rate and the BI length of the data volume in described memory, described antenna, when judging that the data of current own cache all can not send in a BI, in the next beacon that described STA receives, increase by the second identification information, to indicate described STA after receiving described next beacon, keep sleep state until airtime of another beacon of described next beacon or the broadcast of another beacon described are waken up after completing again, and in the BI of another beacon described, obtain corresponding data.
6. subscriber equipment as claimed in claim 5, it is characterized in that, described processing unit specifically for, according to data transmission rate and the BI length of the data volume in described memory, described antenna, when judging that the data of current own cache all can send in a BI, in the next beacon that described STA receives, increase by the first identification information, to indicate described STA in the BI of described next beacon, obtain data from described subscriber equipment.
7. subscriber equipment as claimed in claim 5, it is characterized in that, another beacon described, be specially the N number of beacon after the next beacon that described STA receives, and 1<=N<ListenInterval, wherein ListenInterval is the number of the beacon interval BI between adjacent two beacons of described STA periodic receipt, and the value of N is determined according to the data transmission rate of the data volume in described memory, described antenna and BI length by described processing unit.
8. the subscriber equipment as described in any one of claim 5-7, is characterized in that, described antenna also for, receive described STA send association request; Described processing unit also for, distribute to described STA ListenInterval value, and the ListenInterval value distributing to described STA is added on asks in corresponding associate response message with described association, described STA is sent to by described antenna, after receiving described associate response message to make described STA, substitute oneself original ListenInterval value by the ListenInterval value of described distribution.
9. a communication system, is characterized in that, comprising: the subscriber equipment as described in any one of claim 5-8, and at least one site STA, and at least one STA described is connected with described communications of user equipment.
10. system as claimed in claim 9, is characterized in that, at least one STA described, when associating with described subscriber equipment, identifies the ListenInterval value of oneself, preserves described ListenInterval value to make described subscriber equipment in association request.
CN201210132619.9A 2012-04-28 2012-04-28 In WLAN (wireless local area network), STA obtains method, the Apparatus and system of data Expired - Fee Related CN103379595B (en)

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015081518A1 (en) * 2013-12-04 2015-06-11 华为技术有限公司 Management frame sending processing method and system
WO2015085552A1 (en) * 2013-12-12 2015-06-18 华为终端有限公司 Data transmission method and device
US9736774B2 (en) 2015-01-30 2017-08-15 Huawei Technologies Co., Ltd. Apparatus and method for a wireless device to receive data in an eco state
US20160337899A1 (en) * 2015-05-13 2016-11-17 Qualcomm Incorporated Power save trigger
US10952139B2 (en) * 2016-03-28 2021-03-16 Qualcomm Incorporated Wireless communication involving a wake time period for a station
CN109302736B (en) * 2017-07-24 2021-06-25 展讯通信（上海）有限公司 Sleep control method and device for wireless local area network, storage medium, workstation and terminal
WO2019061107A1 (en) 2017-09-27 2019-04-04 华为技术有限公司 Multi-beam polling based transmission method and communication device
KR20210137549A (en) * 2019-04-25 2021-11-17 마이크로칩 테크놀로지 인코포레이티드 Change of master node in a wired local area network, and related systems, methods and devices
CN110087244A (en) * 2019-04-29 2019-08-02 新华三技术有限公司 A kind of information acquisition method and device
US11659486B2 (en) * 2020-02-11 2023-05-23 Mediatek Inc. Wireless communication method with adaptive power control mechanism and associated circuitry within electronic device
US11570715B2 (en) * 2020-09-07 2023-01-31 Mediatek Inc. Power saving with latency control mechanism of electronic device
CN117499946A (en) * 2022-07-26 2024-02-02 华为技术有限公司 Clock signal processing method, device and wireless distributed system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101395844A (en) * 2006-03-03 2009-03-25 高通股份有限公司 Standby time improvements for stations in a wireless network
CN102325360A (en) * 2011-07-13 2012-01-18 中国联合网络通信集团有限公司 Data frame processing method and wireless access point

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101395844A (en) * 2006-03-03 2009-03-25 高通股份有限公司 Standby time improvements for stations in a wireless network
CN102325360A (en) * 2011-07-13 2012-01-18 中国联合网络通信集团有限公司 Data frame processing method and wireless access point

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
无线局域网的电源管理和网络管理功能研究;杨秋岩;《中国优秀硕士学位论文全文数据库 信息科技辑》;20091115;第18-23页、第37-38页 *

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