CN105451346A - Uplink data transmission method and device - Google Patents

Uplink data transmission method and device Download PDF

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Publication number
CN105451346A
CN105451346A CN201410264211.6A CN201410264211A CN105451346A CN 105451346 A CN105451346 A CN 105451346A CN 201410264211 A CN201410264211 A CN 201410264211A CN 105451346 A CN105451346 A CN 105451346A
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China
Prior art keywords
website
message
channel
access point
wireless access
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CN201410264211.6A
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Chinese (zh)
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CN105451346B (en
Inventor
树贵明
权荣训
容志刚
陆苏
丁志明
杜振国
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Ruizhi Information Technology Binzhou Co ltd
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Huawei Technologies Co Ltd
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Priority to CN201410264211.6A priority Critical patent/CN105451346B/en
Priority to PCT/CN2015/079994 priority patent/WO2015188698A1/en
Publication of CN105451346A publication Critical patent/CN105451346A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/04—Scheduled or contention-free access

Abstract

The embodiment of the invention discloses an uplink data transmission method and device, and the method comprises the steps that a wireless AP determines the correlation among a plurality of STA channels according to the channel estimation information reported by a plurality of STAs, and the wireless AP can distribute the same channel resources for at least two STAs which are unrelated with each other, so as enable the STAs with the same distributed channel resources to use the same channel resource for parallel transmission of uplink data, i.e., enabling the STAs to transmit the uplink data through employing the same time frequency resource, thereby improving the utilization efficiency of channel resources during uplink transmission.

Description

Uplink data transmission method and device
Technical field
The embodiment of the present invention relates to wireless communication technology field, particularly relates to uplink data transmission method and device.
Background technology
The function of wireless aps (AccessPoint, access point) is that cable network is converted to wireless network, is the communication bridge of cable network and wireless network.In a wireless local area network, multiple STA (Station, website) of wireless aps and its service share a communication channel by carrier sense multiple access access mechanism, utilize random backoff mechanism minimizing conflict around here.
A kind of uplink data transmission method of the prior art, wireless aps allows by the instruction of uplink synchronous instruction frame the STA sending upstream data, STA is after the time of a short frame period receiving uplink synchronous instruction frame, a corresponding subchannel is selected in the position indicated in uplink synchronous instruction frame according to oneself, send the uplink channel resources information that RTS (RequestToSend, request sends) message instruction needs self.After wireless aps receives the RST message of STA transmission, CTS (ClearToSend is sent to this STA by the subchannel of correspondence, confirm to send) message, and in CTS message, be designated as the uplink channel resources of this STA distribution, this STA then, after a short frame period time, the channel resource of specifying sends upstream data.Finally realizing wireless aps can simultaneously for supporting that multiple STA of OFDMA (OrthogonalFrequencyDivisionMultipleAccess, orthogonal frequency-time multiple access) distribute different channel resources.The STA quantity of serving when wireless aps is more, and some STA need uplink channel resources fewer time, wireless aps may make plural STA share a sub-channels in a time division manner, such as, STA1 uses described subchannel to send data within t1 ~ t2 time period, and STA2 uses described subchannel to send data within t2 ~ t3 time period.This mode, at a time a sub-channels can only be used by a STA, and namely same time-frequency channel resource can only be used by a STA, and therefore, frequency spectrum service efficiency is lower.
Summary of the invention
Provide a kind of uplink data transmission method and device in the embodiment of the present invention, the multiple STA served to realize wireless aps use same time-frequency channel resource transmitted in parallel upstream data, and then improve frequency spectrum service efficiency.
To achieve these goals, the embodiment of the invention discloses following technical scheme:
First aspect, the embodiment of the present invention provides a kind of uplink data transmission method, comprising:
First website receives the uplink Indication message that WAP (wireless access point) sends, and described uplink Indication message comprises the information being used to indicate and allowing described first website and at least one other website to send upstream data;
Described first website sends the first message according to described uplink Indication message to described WAP (wireless access point), described first message at least comprises the channel-estimation information of described first website, to make described WAP (wireless access point) judge whether the channel of described first website and the channel of described second website are correlated with according to the channel-estimation information of described first website and the channel-estimation information of the second website, described second website is a website at least one other website described;
Described first website receives the second message that described WAP (wireless access point) sends, and described second message comprises the information that described WAP (wireless access point) is the channel resource that described first website distributes; Described WAP (wireless access point) is that incoherent described first website of channel is identical with the channel resource that described second website distributes;
The channel resource that described first website utilizes described WAP (wireless access point) to distribute sends upstream data.
In conjunction with first aspect, in the first possible implementation of first aspect, described first website sends the first message according to described uplink Indication message to described WAP (wireless access point), comprising:
While described second website sends the 3rd message according to described uplink Indication message to described WAP (wireless access point), described first website sends described first message according to described uplink Indication message to described WAP (wireless access point); The channel-estimation information of described second website is at least comprised in described 3rd message.
In conjunction with the first possible implementation of first aspect, in the implementation that the second of first aspect is possible, described first message that described first website sends comprises N number of training domain, N is more than or equal to the quantity allowing the website sending upstream data in described uplink Indication message, and a training domain in described N number of training domain is for depositing the channel-estimation information of described first website;
Described first website sends described first message according to described uplink Indication message to described WAP (wireless access point), comprising:
Described first website determines the order of described first website in described first website and at least one other website described according to described uplink Indication message;
Described first website selects the training domain of corresponding order to deposit the channel-estimation information of described first website according to described order from described N number of training domain;
Described first website sends and comprises the first message of the channel-estimation information of described first website, and wherein, described first website utilizes whole channel resource to send described channel-estimation information in the first message.
In conjunction with the implementation that the second of first aspect is possible, in the third possible implementation of first aspect, described first message also comprises the data field for depositing uplink transmission information;
Described first website sends described first message according to described uplink Indication message to described WAP (wireless access point), also comprises:
According to described order, described first website determines that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in described first message in described whole channel resource;
Described first website utilizes the described data field in described first message of described subchannel transmission determined.
In conjunction with the second or the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, described first website utilizes the channel-estimation information in described first message of whole channel resource transmission, comprising:
The channel-estimation information of the first website described in transmitted in parallel on every sub-channels of described first website in described whole channel resource.
In conjunction with first aspect, in the 5th kind of possible implementation of first aspect, described uplink Indication message also comprises the information of the order being used to indicate described first message of described first website transmission;
Described first website sends the first message according to described uplink Indication message to described WAP (wireless access point), comprising:
The described order that described first stop point indicates according to described uplink Indication message sends described first message to described WAP (wireless access point), described first message comprises a training domain, described training domain is for depositing the channel-estimation information of described first website, or, described first message comprises data field and a described training domain, and described data field is for storing the uplink transmission information of described first website.
In conjunction with the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation of first aspect, the described order that described first stop point indicates according to described uplink Indication message sends described first message to described WAP (wireless access point), comprising:
Described first website determines the order of described first website in described first website and at least one other website described according to described uplink Indication message;
Described first website determines according to described order the temporal information sending described first message;
Described first website utilizes the time of whole channel resource indicated by described temporal information to send described first message to described WAP (wireless access point).
In conjunction with the second or the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation of first aspect, described first website determines the order of described first website in described first website and at least one other website described according to described uplink Indication message, comprising:
Default mark corresponding with the association identification of described first website in uplink Indication message described in described first station for acquiring;
Described first website determines that described presetting is marked at indicate in described uplink Indication message whole and presets the order in marking, and using the described order determined as the order of described first website in described first website and at least one other website described.
In conjunction with the first of first aspect or first aspect to any one in the 7th kind of possible implementation, in the 8th kind of possible implementation of first aspect, the channel resource that described first website utilizes described WAP (wireless access point) to distribute sends upstream data, comprising:
While the channel resource transmission upstream data that described second website utilizes described WAP (wireless access point) to distribute, the channel resource that described first website utilizes described WAP (wireless access point) to distribute sends upstream data.
In conjunction with the first of first aspect or first aspect to any one in the 8th kind of possible implementation, in the 9th kind of possible implementation of first aspect, receive the uplink Indication message of WAP (wireless access point) transmission at the first website before, described method also comprises:
Described first website receives the up query messages that described WAP (wireless access point) sends, and described up query messages comprises the information whether having upstream data to send for inquiring about described first website;
Described first website returns query response message to described WAP (wireless access point), described query response message at least comprises the information that described first website of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described query response message.
Second aspect, the embodiment of the present invention also provides a kind of channel resource allocation method, comprising:
WAP (wireless access point) sends uplink Indication message, and described uplink Indication message comprises the information being used to indicate and allowing N number of website to send upstream data, N >=2, and N is integer;
Described WAP (wireless access point) receives N number of channel-estimation information that described N number of website sends respectively according to described uplink Indication message;
Described WAP (wireless access point) judges the correlation of the channel of described N number of website according to the described N number of channel-estimation information received;
Described WAP (wireless access point) be in described N number of website channel mutually incoherent at least two websites distribute identical channel resource, with make described channel mutually incoherent at least two websites utilize identical channel resource to send upstream data simultaneously.
In conjunction with second aspect, in the first possible implementation of second aspect, before WAP (wireless access point) sends uplink Indication message, described method also comprises:
Described WAP (wireless access point) sends up query messages, and described up query messages has upstream data to be sent for inquiring about which website;
Described WAP (wireless access point) receives N number of query response message that described N number of website returns respectively, each described query response message at least comprises the information that website corresponding to the described query response message of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described N number of query response message that described N number of website returns respectively.
In conjunction with the first possible implementation of second aspect or second aspect, in the first possible implementation of the third aspect, described method also comprises:
Described WAP (wireless access point) is that at least two websites that in described N number of website, channel is correlated with distribute different channel resources.
The third aspect, the present invention also provides a kind of transmitting uplink data device, and be applied in the first website, described device comprises:
Receiving element, for receiving the uplink Indication message that WAP (wireless access point) sends, described uplink Indication message comprises the information being used to indicate and allowing described first website and at least one other website to send upstream data;
Transmitting element, for sending the first message according to described uplink Indication message to described WAP (wireless access point), described first message at least comprises the channel-estimation information of described first website, to make described WAP (wireless access point) judge whether the channel of described first website and the channel of described second website are correlated with according to the channel-estimation information of described first website and the channel-estimation information of the second website, described second website is a website at least one other website described;
Described receiving element, also for receiving the second message that described WAP (wireless access point) sends, described second message comprises the information that described WAP (wireless access point) is the channel resource that described first website distributes; Described WAP (wireless access point) is that incoherent described first website of channel is identical with the channel resource that described second website distributes;
Described transmitting element, the channel resource also for utilizing described WAP (wireless access point) to distribute sends upstream data.
In conjunction with the third aspect, in the first possible implementation of the third aspect, when described transmitting element is used for sending the first message according to described uplink Indication message to described WAP (wireless access point), specifically for, while described second website sends the 3rd message according to described uplink Indication message to described WAP (wireless access point), send described first message according to described uplink Indication message to described WAP (wireless access point); The channel-estimation information of described second website is at least comprised in described 3rd message.
In conjunction with the first possible implementation of the third aspect, in the implementation that the second of the third aspect is possible, described first message comprises N number of training domain, N is more than or equal to the quantity allowing the website sending upstream data in described uplink Indication message, and a training domain in described N number of training domain is for depositing the channel-estimation information of described first website;
Described transmitting element be used for when sending the first message according to described uplink Indication message to described WAP (wireless access point) specifically for:
The order of described first website in described first website and at least one other website described is determined according to described uplink Indication message;
From described N number of training domain, the training domain of corresponding order is selected to deposit the channel-estimation information of described first website according to described order;
Send and comprise the first message of the channel-estimation information of described first website, wherein, described transmitting element utilizes whole channel resource to send described channel-estimation information in the first message.
In conjunction with the implementation that the second of the third aspect is possible, in the third possible implementation of the third aspect, described first message also comprises the data field for depositing described uplink transmission information;
When described transmitting element sends the first message according to described uplink Indication message to described WAP (wireless access point), also for:
Determine that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in described first message in described whole channel resource according to described order;
Utilize the described data field in described first message of described subchannel transmission determined.
In conjunction with the second or the third possible implementation of the third aspect, in the 4th kind of possible implementation of the third aspect, during the described channel-estimation information that described transmitting element utilizes whole channel resource to send in the first message, specifically for the channel-estimation information of the first website described in transmitted in parallel on the every sub-channels in described whole channel resource.
In conjunction with the implementation that the second of the third aspect is possible, in the 5th kind of possible implementation of the third aspect, when described transmitting element is used for determining the order of described first website in described first website and at least one other website described according to described uplink Indication message, specifically for:
Obtain default mark corresponding with the association identification of described first website in described uplink Indication message;
Determine that described presetting is marked at indicate in described uplink Indication message whole and presets the order in marking, and using the described order determined as the order of described first website in described first website and at least one other website described.
In conjunction with the first of the third aspect or the third aspect to any one in the 5th kind of possible implementation, in the 6th kind of possible implementation of the third aspect, it is characterized in that, when described transmitting element sends upstream data for the channel resource utilizing described WAP (wireless access point) and distribute, specifically for: while the channel resource transmission upstream data that described second website utilizes described WAP (wireless access point) to distribute, the channel resource utilizing described WAP (wireless access point) to distribute sends upstream data.
In conjunction with the first of the third aspect or the third aspect to any one in the 6th kind of possible implementation, in the 7th kind of possible implementation of the third aspect,
Described receiving element, also for receiving the up query messages that described WAP (wireless access point) sends, described up query messages comprises the information whether having upstream data to send for inquiring about described first website;
Described transmitting element, also for returning query response message to described WAP (wireless access point), described query response message at least comprises the information that described first website of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described query response message.
Fourth aspect, the present invention also provides a kind of upper signal channel resource allocation device, is applied to WAP (wireless access point), comprises:
Transmitting element, for sending uplink Indication message, described uplink Indication message comprises the information being used to indicate and allowing N number of website to send upstream data, N >=2, and N is integer;
Receiving element, for receiving N number of channel-estimation information that described N number of website sends respectively according to described uplink Indication message;
Channel estimating unit, the described N number of channel-estimation information for receiving according to described receiving element judges the correlation of the channel of described N number of website;
Channel resource allocation unit, for for channel in described N number of website mutually incoherent at least two websites distribute identical channel resource, with make described channel mutually incoherent at least two websites utilize identical channel resource to send upstream data simultaneously.
In conjunction with fourth aspect, in the first possible implementation of fourth aspect:
Described transmitting element, also for sending up query messages, described up query messages has upstream data to be sent for inquiring about which website;
Described receiving element, also for receiving N number of query response message that described N number of website returns respectively, each described query response message at least comprises the information that website corresponding to the described query response message of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described N number of query response message that described N number of website returns respectively.
In conjunction with the first possible implementation of fourth aspect or fourth aspect, in the implementation that the second of fourth aspect is possible:
Described channel resource allocation unit, at least two websites also for being correlated with for channel in described N number of website distribute different channel resources.
5th aspect, the present invention also provides a kind of terminal equipment, and described terminal equipment is the first website, and described terminal equipment comprises arbitrary described transmitting uplink data device that the third aspect provides.
6th aspect, the present invention also provides a kind of wireless access device, comprises arbitrary described upper signal channel resource allocation device that fourth aspect provides.
From above technical scheme, in the embodiment of the present invention, wireless aps determines the correlation of the channel of multiple STA according to the respective channel-estimation information that multiple STA reports, then wireless aps can for channel mutually incoherent at least two STA distribute identical channel resource, same channel resource transmitted in parallel upstream data is used to make the multiple STA being assigned with same channel resource, namely multiple STA uses same time-frequency channel resource to send upstream data, thus the utilization ratio of channel resource when improve uplink.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, for those of ordinary skills, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of a kind of channel resource allocation method of the embodiment of the present invention;
Fig. 2 is the schematic flow sheet of a kind of uplink data transmission method of the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of another uplink data transmission method of the embodiment of the present invention;
Fig. 4 (a) is the form schematic diagram of the MAC layer of a kind of ULTA message of the embodiment of the present invention;
Fig. 4 (b) is the form schematic diagram of the embodiment of the present invention another kind of ULTA message MAC layer;
Fig. 5 is the form schematic diagram of the MAC layer of a kind of CTS message of the embodiment of the present invention
Fig. 6 is the schematic diagram in a kind of AIDMAP territory of the embodiment of the present invention;
Fig. 7 is a CTS message schematic diagram of a kind of shown multiple STA of the embodiment of the present invention;
Fig. 8 is the message format schematic diagram of a kind of 2nd CTS message MAC layer of the embodiment of the present invention;
Fig. 9 is the schematic diagram of the uplink data transmission method of the corresponding embodiment of Fig. 3;
Figure 10 is the schematic flow sheet of the another kind of uplink data transmission method of the embodiment of the present invention;
Figure 11 is the message format schematic diagram of a kind of ULA message of the embodiment of the present invention;
Figure 12 is the message format schematic diagram of the another kind of ULA message of the embodiment of the present invention;
Figure 13 is the schematic diagram of the uplink data transmission method of the corresponding embodiment of Figure 10;
Figure 14 is the schematic flow sheet of the another kind of uplink data transmission method of the embodiment of the present invention;
Figure 15 is the schematic diagram of the uplink data transmission method of the corresponding embodiment of Figure 14;
Figure 16 is the schematic flow sheet of the another kind of uplink data transmission method of the embodiment of the present invention;
Figure 17 is the schematic diagram of the uplink data transmission method of the corresponding embodiment of Figure 16;
Figure 18 is the schematic diagram of a kind of transmitting uplink data device of the embodiment of the present invention;
Figure 19 is the schematic diagram of the another kind of transmitting uplink data device of the embodiment of the present invention;
Figure 20 is the schematic diagram of a kind of channel resource allocation device of the embodiment of the present invention;
Figure 21 is the schematic diagram of the another kind of channel resource allocation device of the embodiment of the present invention.
Embodiment
Technical scheme in the present invention is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, 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, should belong to the scope of protection of the invention.
See Fig. 1, be the schematic flow sheet of a kind of channel resource allocation method that the embodiment of the present invention provides, the method is applied in wireless aps, wherein, STA can be the equipment such as mobile phone, PC or panel computer, and as shown in Figure 1, described method can comprise the following steps:
S110, wireless aps sends ULTA (UpLinkTransmissionAnnounce, uplink indicates) message, and described ULTA message comprises the information being used to indicate and allowing N number of STA to send upstream data.Wherein, N is integer, and N >=2.
Described ULTA message can be independently message, is independently sent by wireless aps; Or, an information element can be become by being used to indicate the Information encapsulation allowing N number of STA to send upstream data, being included in other message (such as, beacon Beacon message) and sending.It should be noted that, uplink Indication message described in various embodiments of the present invention, just be used to refer to the message sent for wireless aps, be not for limiting this message, in specific implementation, this uplink Indication message can be other title, as long as comprising being used to indicate the information allowing N number of STA to send upstream data.
S120, N number of channel-estimation information that the N number of STA described in wireless aps receives sends respectively according to described ULTA.
After receiving described ULTA message, according to described ULTA message, described N number of STA can judge whether this STA sends upstream data to wireless aps respectively; N number of STA described in the instruction of this ULTA message allows sends upstream data, so namely described N number of STA returns each self-corresponding channel-estimation information to wireless aps, each STA in described N number of STA all sends channel-estimation information corresponding to this STA to wireless aps.Wherein, this channel-estimation information, when transmitting channel estimated information, can be carried in certain message and send by STA, such as be carried at and confirm to send in (cleartosend, CTS) message, or, the request that is carried at sends in (requesttosend, RTS) message.
It should be noted that, wireless aps send ULTA message time, may not know current have which STA need send upstream data; When which STA is wireless aps do not know to have need to send upstream data, wireless aps can indicate and allow some STA to send upstream data in ULTA message, but these STA being allowed to send upstream data differ and established a capital upstream data and need transmission; When the STA being allowed to send upstream data has upstream data to send, the channel-estimation information of this STA can be returned to wireless aps; When the STA being allowed to send upstream data does not have upstream data to send, then not to wireless aps Return Channel estimated information.The multiple STA sending upstream data are allowed not to be when having upstream data to need to send when wireless aps indicates in ULTA message, N in the present embodiment can indicate the quantity of the STA that upstream data needs send, described ULTA message now in the present embodiment can also comprise out of Memory, such as, can also comprise the information that other STA be used to indicate except above-mentioned N number of STA sends upstream data.Such as, the instruction of ULTA message allows STA1 ~ STA5 to send upstream data, but only has STA1 ~ STA3 to need to send upstream data, and now N can be 3, and N number of STA represents STA1 ~ STA3.
S130, wireless aps judges the correlation of the channel of described N number of STA according to the described N number of channel-estimation information received.
Wireless aps, according to the N number of channel-estimation information received from N number of STA, can judge whether the channel of every two STA in described N number of STA is correlated with.
The channel of the STA in various embodiments of the present invention can be the channel transmitting data between STA and wireless aps.
S140, wireless aps be in N number of website channel mutually incoherent at least two STA distribute identical channel resource, with make described channel mutually incoherent at least two STA utilize identical channel resource to send upstream data simultaneously.
It should be noted that, in various embodiments of the present invention, for channel mutually incoherent at least two STA allocation of channel resources time, as long as it is uncorrelated mutually between two to ensure to be assigned with the channel of multiple STA of identical channel resource; The embodiment of the present invention do not limit must for channel mutually incoherent at least two STA distribute identical channel resource.Such as, in multiple STA (STA1 ~ STA3) of wireless aps service, the channel cross-correlation of STA1, STA2, STA3, then wireless aps can distribute identical channel resource for STA1, STA2 and STA3; Or wireless aps can distribute identical channel resource for STA1 and STA2, for STA3 distributes other channel resource; Or wireless aps can distribute identical channel resource for STA1 and STA3, for STA2 distributes other channel resource; Or wireless aps can distribute identical channel resource for STA2 and STA3, for STA1 distributes other channel resource.
At least two STA being assigned with identical channel resource can use same channel resource to send data to wireless aps simultaneously.Namely the multiple STA being assigned with identical channel resource can utilize same time-frequency channel resource parallel transmission upstream data.
It should be noted that, the channel of multiple STA is uncorrelated mutually refers to that the channel of any two STA in multiple STA is all uncorrelated.
For at least two STA that channel in N number of website is relevant, wireless aps needs at least two STA be correlated with for channel to distribute different channel resources.
Further, the information of the channel resource of distribution can be carried in certain message (such as CTS message or RTS message) and send to corresponding STA by wireless aps.After wireless aps receives the channel estimating message of N number of STA transmission, confirm that this N number of STA has upstream data to need to send.Then, wireless aps after for N number of STA allocation of channel resources, sends the message of carrying channel resource information, such as the 2nd CTS message to this N number of STA.
Wherein, wireless aps is the process of multiple STA allocation of channel resources can be that the message comprising respective channel-estimation information that first wireless aps sends according to each STA determines that the channel of which STA is incoherent.Mutual for channel incoherent STA can be divided into one group, and determine that this group STA can share the identical channel resource of use.For the STA that channel is relevant, wireless aps then distributes different channel resources for them, avoids clashing during transmit ascending data.As for the size that AP is the channel resource that STA distributes, the data transmission capabilities then can supported according to the uplink transmission information of STA and wireless aps self is determined, if but in the message (a CTS message or RTS message) of STA transmission, do not comprise the uplink transmission information of STA, then wireless aps can be that each STA distributes suitable uplink channel resources according to the data transmission capabilities of self and the nearest upstream bandwidth conditions of demand of each STA, or wireless aps directly can also distribute predetermined uplink channel resources for each STA according to the data transmission capabilities of self.
In one embodiment of the invention, wireless aps can send N number of 2nd CTS message respectively to N number of STA, wherein, comprises the information that wireless aps is the channel resource that STA corresponding to the 2nd CTS message distributes in each 2nd CTS message.
In another embodiment of the present invention, wireless aps only can send a 2nd CTS message, is included as the information of the channel resource that N number of STA distributes in the 2nd CTS message simultaneously.
Alternatively, wireless aps, after distributing channel resource for STA, can also receive the upstream data that STA is the channel resource transmission that it distributes by wireless aps, namely perform S150.
S150, wireless aps receive STA utilize described wireless aps be described STA1 distribute channel resource send upstream data.
Wherein, be assigned with multiple STA of same channel resource, the channel resource be assigned with can be used simultaneously to send upstream data.Such as: if the channel of the channel of STA1 and STA2 is uncorrelated, wireless aps is that STA1 and STA2 distributes identical channel resource, then STA1 and STA2 can utilize same channel resource to send upstream data to wireless aps simultaneously.
In the present embodiment, wireless aps can determine the correlation of the channel of multiple STA according to the channel-estimation information of STA, and can for channel mutually incoherent at least two STA distribute identical channel resource, upstream data can be sent on same channel resource to make the mutual incoherent website of multiple channel, namely the mutual incoherent website of multiple channel can use same time-frequency channel resource parallel transmission upstream data, the utilization ratio of the channel resource (that is, frequency spectrum) when this improves uplink.
Refer to Fig. 2, for the schematic flow sheet of a kind of uplink data transmission method that the embodiment of the present invention provides, the method describes the process of transmitting uplink data from STA1 side, and the method is described for wireless aps, STA1 and STA2, as shown in Figure 2, described method comprises:
S210, STA1 receive the ULTA message that wireless aps sends, and described ULTA message comprises the information being used to indicate and allowing STA1 and at least one other STA to send upstream data.
Wherein, STA2 can be a STA at least one other STA described.And STA1, STA2 all have upstream data to need to send.
S220, STA1 sends the first message according to described ULTA message to wireless aps, described first message at least comprises the channel-estimation information of STA1, can judge that whether the channel of STA1 is relevant to the channel of STA2 to make described wireless aps according to the channel-estimation information of the channel-estimation information of STA1 and STA2.
Wherein, the channel-estimation information of STA2 can be that STA2 sends to wireless aps according to described ULTA message.
After STA1 receives the ULTA message of wireless aps transmission, first judge whether wireless aps allows STA1 to send upstream data, if wireless aps allows STA1 to send upstream data, and STA1 have upstream data need send time, the first message is sent (such as to wireless aps, one CTS message), a described CTS message at least comprises the channel-estimation information of STA1, can also comprise the uplink transmission information of STA1.In like manner, STA2 can send the 3rd message according to ULTA message to wireless aps, and described 3rd message at least comprises the channel-estimation information of STA2, can also comprise the uplink transmission information of STA2.
It should be noted that, described first message or the 3rd message can be the CTS message that STA sends to wireless aps, or, also can be the RTS message that STA sends to wireless aps.
If STA1 does not have upstream data to be sent, then in the first message, uplink transmission information can be set to presupposed information, such as, binary number " 0 " or " 1 ", or STA1 does not send the first message.
In one embodiment of the invention, the first message of STA1 transmission and the 3rd message of STA2 transmission can transmitted in parallel.In another embodiment of the present invention, the first message of STA1 transmission and the 3rd message of STA2 transmission can send in a time division manner successively.
S230, STA1 receive the second message that wireless aps sends, and described second message comprises the information that wireless aps is the channel resource that STA1 distributes, and wireless aps is that the channel resource that incoherent STA1 with STA2 of channel distributes is identical.
After wireless aps receives the first message of STA1 transmission, confirm that STA1 has upstream data to send, then, the channel-estimation information of wireless aps according to STA1 and the channel-estimation information of STA2, judge whether the channel of STA1 and the channel of STA2 are correlated with, if uncorrelated, then can distribute identical channel resource for STA1 and STA2, and inform that STA1 and STA2 wireless aps is the channel resource that STA1 and STA2 distributes by the second message.
The channel resource that S240, STA1 utilize wireless aps to distribute for STA1 sends upstream data.
When the channel resource of STA1 with STA2 is identical, the same channel resource that STA1 and STA2 utilizes wireless aps to distribute simultaneously sends upstream data.
The uplink data transmission method that the present embodiment provides, STA1 is after the ULTA message receiving wireless aps transmission, the first message of the channel-estimation information comprising STA1 is returned to wireless aps, when determining the channel irrelevance of the channel of STA1 and STA2 to make wireless aps according to the channel-estimation information of STA1 and the channel-estimation information of STA2, for the identical channel resource that STA1 with STA2 distributes, realizing STA1 and STA2 uses same channel resource to send upstream data, namely incoherent STA1 and STA2 of channel can utilize same time-frequency channel resource, thus the utilization ratio of channel resource when improve uplink.
Refer to Fig. 3, show the method flow schematic diagram of the exemplary embodiment of a kind of uplink data transmission method of the present invention, the present embodiment is described for wireless aps, STA1, STA2 and STA3.As shown in Figure 3, the method can comprise the following steps:
S310, wireless aps sends ULTA message, and described ULTA message comprises the information being used to indicate and allowing STA1, STA2 and STA3 to send upstream data.Wireless aps can send described ULTA message by broadcast or multicast mode.Then, S320 is performed.
The information being used to indicate and allowing N number of STA to send upstream data can be comprised in ULTA message, wherein N be more than or equal to 2 positive integer, be described for N=3 in the present embodiment.
Fig. 4 (a) shows a kind of message format schematic diagram of ULTA message, and the ULTA message in the present embodiment is independently message, can send separately ULTA message by wireless aps.As shown in Fig. 4 (a), the form of the MAC layer of ULTA message is followed successively by from left to right: FrameControl (control frame), Duration (width) territory, RA (receiveraddress, receiver address) territory, AIDMAP (association identification distribution) territory and FCS (FrameCheckSequence, Frame Check Sequence) territory.Wherein, association identification is (AssociationIdentifier, AID).AIDMAP territory allows STA to send the information of upstream data for depositing instruction, and STA sends the information of a CTS message.
The STA of the corresponding corresponding AID numerical value of the precedence of each in AIDMAP territory, AIDMAP territory can comprise 2008 binary systems.Such as, first of AIDMAP corresponds to AID is the website of 1, and it is the website of 2 that second corresponds to AID, the like, the 2008th corresponding A ID is the STA of 2008.When a certain position in AIDMAP territory is set to preset mark, then show to allow corresponding STA to send upstream data, otherwise, do not allow corresponding website to send upstream data.Wherein, default mark can be prespecified, such as, can specify to preset to be labeled as " 1 " or " 0 "; When preset be labeled as " 1 " time, if the 3rd of AIDMAP territory the be " 1 ", then show allow AID be 3 (decimal systems) website transmission upstream data.Described ULTA message can also be an information element, is included in other message (such as, beacon message Beacon) and sends.
Fig. 4 (b) shows message format when ULTA message is information element, and the form of the MAC layer of this information element is followed successively by from left to right: Element (element) ID, Length (length), AIDMAP (association identification distribution) territory.Wherein, the content in AIDMAP territory and implication identical with the AIDMAP territory in Fig. 4 (a), repeat no more herein.
S320, STA1 send a CTS message according to described ULTA message to wireless aps; STA2 sends a CTS message according to described ULTA message to wireless aps; STA3 sends a CTS message according to described ULTA message to wireless aps.The CTS message that STA1 sends at least comprises the channel-estimation information of STA1, and the CTS message that STA2 sends at least comprises the channel-estimation information of STA2, and the CTS message that STA3 sends at least comprises the channel-estimation information of STA3.Then S330 is performed.
Alternatively, after STA1 receives the ULTA message of wireless aps transmission, first judge whether the AID corresponding data position of STA1 in AIDMAP territory is preset mark, if preset mark, then determine that wireless aps permission STA1 sends upstream data, then perform S320.Same, STA2 and STA3 also after determining that wireless aps allows STA2 and STA3 transmission upstream data, can perform S320.
In the present embodiment, three CTS message that STA1, STA2 and STA3 send can send simultaneously, are that a CTS message is described for the CTS message that STA sends.Wherein, STA1 send a CTS message can be equivalent to embodiment illustrated in fig. 2 in the first message, STA2 or STA3 send a CTS message can be equivalent to embodiment illustrated in fig. 2 in the 3rd message.
Fig. 5 shows the schematic diagram of the MAC layer message format of a kind of CTS message of the embodiment of the present invention, a described CTS message is followed successively by from left to right: FrameControl (control frame), Duration (length) territory, AID (AssociationIdentifier, association identification) territory, Bandwithinformation (channel width resource information) territory and FCS (FrameCheckSequence, Frame Check Sequence) territory.Described Bandwithinformation territory is for storing the uplink transmission information of STA.
In order to ensure in the CTS message that redefines MAC layer message format can identify by the STA of existing WLAN standard IEEE802.11 agreement, by 64 receiver address (receiveraddress in the MAC layer message of CTS message that specifies in existing WLAN standard IEEE802.11 agreement, RA) territory redefine into AID territory (such as, 16) and Bandwithinformation territory is (such as, 24), AID territory is for storing the association identification AID of STA, and channel width resource information territory is for storing the bandwidth resource information of STA request.
In the present embodiment, a CTS message can comprise header field and the data field of physical layer formats, wherein, the MAC layer of a CTS message is packaged into the data field of a CTS message; Can arrange multiple training (trainfiled, TF) territory in described header field, the quantity in the TF territory of setting is no less than the quantity that wireless aps allows the STA sending upstream data.Such as, by the quantity in ULTA message instruction TF territory, that is, can indicate the quantity allowing the STA sending upstream data in ULTA message, this quantity is the quantity in TF territory.A TF territory in multiple TF territory is used for depositing channel-estimation information, the uplink transport channel characteristic of this channel-estimation information for making AP estimate STA.Wherein, TF territory can be LTF (long training, longtrainfiled) territory, also can be STF (Short Training, shorttrainfiled) territory.
In the present embodiment, the process that STA1 sends a corresponding CTS message to wireless aps can comprise the following steps 11)-16); It should be noted that, the process that STA2, STA3 send a corresponding CTS message to wireless aps is identical with the process that STA1 sends a CTS message.
Step 11), according to ULTA message, STA1 determines that STA1 allows the order sent in whole STA of upstream data in wireless aps.
The schematic diagram that a kind of default mark that Fig. 6 shows AIDMAP territory is arranged, the 1st, the 3rd, the 4th is only had to be " 0 " for presetting mark " 1 " other position in Fig. 6 in AIDMAP territory, the quantity of default marks whole in AIDMAP in this example is 3, and namely wireless aps permission AID is three STA transmission upstream datas of 1,3,4 respectively.Wherein, the order of the order of default mark of the 1st to be the order of the default mark of the first, 3rd the be default mark of the second, 4th is the 3rd; Namely AID is the order of STA in three STA of 1 to be the first, AID be 3 the order of STA in three STA to be the second, AID be 4 the order of STA in three STA be the 3rd.
Suppose AID be 4 STA be STA1 in the present embodiment, AID be 3 STA be STA2 in the present embodiment, AID be 1 STA be STA3.
Step 12), STA1 selects the TF territory of corresponding order to deposit the channel-estimation information of STA1 according to described order from multiple TF territories of a CTS message to be sent.
The order that STA allows in wireless aps to send in whole STA of upstream data can be set up in advance, and the mapping relations between the order in multiple TF territory.Like this, determining that STA1 is after being allowed to send the order in whole STA of upstream data, can select corresponding secondary thick TF territory from multiple TF territory according to described mapping relations.
In one embodiment of the invention, the order in multiple TF territory can be consistent with the order that this STA is being allowed to the whole STA sending upstream data.Such as, the example shown in Fig. 6, AID be 4 STA (STA1) order in three STA be the 3rd, then STA1 selects the 3rd TF territory to deposit channel-estimation information; AID be 3 STA (STA2) order in three STA be the second, then STA2 selects second TF territory to deposit channel-estimation information; AID be 1 STA (STA3) order in three STA be the first, then STA3 selects first TF territory to deposit channel-estimation information.
In another embodiment of the present invention, can by the backward of the default order be marked in whole default marks corresponding for STA in AIDMAP territory, select the order in TF territory as STA, namely this STA is consistent with the order in multiple TF territory in the backward of the order being allowed to the whole STA sending upstream data.The order of STA (STA1) in three STA being still 4 for Fig. 6, AID is the 3rd, then STA1 selects first TF territory to deposit channel-estimation information; AID be 3 STA (STA2) order in three STA be the second, then STA2 selects second TF territory to deposit channel-estimation information; AID be 1 STA (STA3) order in three STA be the first, then STA3 selects the 3rd TF territory to deposit channel-estimation information.
Step 13), STA1 sends the CTS message comprising the channel-estimation information of STA1, wherein, STA1 utilizes the described channel-estimation information in whole channel resource transmission the one CTS message, and namely STA1 utilizes whole channel resource to send the TF territory of depositing channel-estimation information in a CTS message.
Due in step 12) in, STA1 can select the TF territory of certain order to deposit the channel-estimation information of STA1 from multiple TF territory, in like manner, STA2 (or STA3) also can select the TF territory of certain order to deposit the channel-estimation information of STA2 (or STA3) in multiple TF territories to be sent.Further, the order in the TF territory that STA1, STA2, STA3 select is different, so make STA1, STA2, STA3 can send the TF territory of depositing channel-estimation information in a CTS message at whole channel resource simultaneously.Wherein, described whole channel resource is the frequency spectrum resource of the whole channel of wireless aps work, and the size of this frequency spectrum resource can have multiple, such as, and 20MHz, 40MHz, 80MHz, 160MHz etc.Be 40MHz below with frequency spectrum resource for example is described.
In one embodiment of the invention, STA1 utilize whole channel resource transmitting channel estimated information can be on every sub-channels in whole channel resource with the channel-estimation information of the mode transmitted in parallel STA1 copied, namely all send identical information (channel-estimation information of STA1) on each of the sub-channels.
In another embodiment of the present invention, STA1 can directly utilize whole channel resource to send the channel-estimation information of STA1, namely the every sub-channels in whole channel resource uploads defeated a part of channel-estimation information, the channel-estimation information that the information structure one of whole subchannel transmission is complete.
It should be noted that, described subchannel is the set comprising one or more subcarrier.Subchannel and subcarrier can divide in advance and define.Such as 40MHz channel is evenly divided into 512 subcarriers, can using one or more subcarrier as a sub-channels.Such as, every 32 subcarriers, as a sub-channels, such 40MHz channel are divided into 16 sub-channels from low to high successively by frequency, be respectively the first subchannel, the second subchannel ..., the 16 subchannel.Certainly, channel resource can also be divided into other quantity subcarrier or subchannel.
Alternatively, the one CTS message of STA1 can also comprise data field, described data field is for storing the uplink transmission information of STA1, wireless aps can be that STA1 distributes concrete channel resource according to the transmittability of the uplink transmission information deposited in data field and wireless aps, and the process that STA sends a CTS message is further comprising the steps of:
Step 14), according to described order, STA1 determines that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in a described CTS message in described whole channel resource.
Alternatively, when comprising the data field depositing uplink transmission information corresponding to STA in a CTS message, whole order (namely STA is at all order being allowed to send in the STA of upstream data) preset in mark in the default AIDMAP of the being marked at territory of STA are corresponding with the order that STA sends the subchannel that data field uses.
Corresponding default of STA can be set up in advance be marked at whole that AIDMAP territory arranges and preset the order in marking and the mapping relations between the order of STA chooser channel.After determining the default order be marked in whole default mark that STA is corresponding, can determine that this STA selects the order in TF territory according to described mapping relations.Determine that the process of the order of the subchannel transmitting data field content selects the process in TF territory identical with STA, repeat no more herein.
Such as, in Fig. 6, AID is the STA (STA1) of 4 is the 3rd at whole order preset in mark in AIDMAP territory, then STA1 can select the 3rd sub-channels to send the content of data field from whole channel resource.
Step 15), STA1 utilizes the subchannel of self correspondence to send the content of data field in a CTS message corresponding to STA1, simultaneously, STA2 utilizes the subchannel of self correspondence to send the content of data field in a CTS message corresponding to STA2, meanwhile, STA3 utilizes the subchannel of self correspondence to send the content of data field in a CTS message corresponding to STA3.
STA1, STA2 and STA3 utilize the data field in the different each self-corresponding CTS message of sub-channel parallel transmission.
Namely STA1 is in the time window that selected TF territory is corresponding, utilizes whole channel resource to send the channel-estimation information of STA1, and corresponding subchannel sends the data field in a CTS message.The mode that STA2 or STA3 sends a CTS message is identical with the mode that STA1 sends a CTS message.Because STA1, STA2 and STA3 select the order depositing the TF territory of channel-estimation information different, therefore, STA1, STA2 are different with the sequential of STA3 transmitting channel estimated information, and see on the whole, and three CTS message that STA1, STA2 and STA3 are corresponding are respectively transmitted in parallel.
STA selects the TF territory of relevant position to store the channel-estimation information of self correspondence according to ULTA message, and utilizes the content in the TF territory selected by the transmission of whole channel.Meanwhile, select corresponding subchannel to send the content of data field in a CTS message according to described ULTA message, namely realize multiple STA transmitted in parallel the one CTS message.
Fig. 7 shows the schematic diagram of the process of transmitting of a CTS message, comprises three STA, is STA1, STA2 and STA3 respectively.In Fig. 7, TF territory is described for LTF territory.Suppose that the order of " 1 " in the AID corresponding A IDMAP territory of the STA1 order that to be the order of " 1 " in the AID corresponding A IDMAP territory of the first, STA2 be " 1 " in the AID corresponding A IDMAP territory of the second, STA3 is the 3rd; And suppose that the order that STA is being allowed to send in whole STA of upstream data is consistent with the order in multiple LTF territory.Therefore, STA1 selects first LTF territory to deposit channel-estimation information, and any message is not deposited in second, third LTF territory, and sends the LTF territory of depositing channel-estimation information over the entire channel; Meanwhile, STA1 selects the first sub-channels to send the content of the data field of a CTS message; In like manner, STA2 selects second LTF territory to send the channel-estimation information of self, and selects the second sub-channels to send the content of data field; STA3 selects the 3rd LTF territory to send the channel-estimation information of self, and selects the 3rd sub-channels to send the content of data field.
S330, wireless aps judges the correlation of the channel of the channel of STA1, the channel of STA2 and STA3 according to the channel-estimation information of the channel-estimation information of STA1, the channel-estimation information of STA2 and STA3; According to the correlation of channel, S340 or S350 can be performed respectively.
Channel-estimation information in TF territory in the CTS message that wireless aps sends according to STA1, calculates the channel receiving matrix of this STA1, carries out channel estimating.In like manner, wireless aps calculates the channel receiving matrix of STA2 and STA3, carries out channel estimating.Then, according to the channel receiving matrix of the channel receiving matrix of STA1, the channel receiving matrix of STA2 and STA3, the correlation of the channel of the channel of STA1, the channel of STA2 and STA3 is judged.
When comprising data field in a CTS message, in the CTS message that wireless aps sends according to STA1, the content of data field obtains the uplink transmission information of STA1, and wireless aps is STA1 allocation of channel resources according to the uplink transmission information of STA1.
S340, when the channel of STA1 is uncorrelated with the channel of STA2, and when the channel of STA1 is relevant with the channel of STA3, wireless aps can distribute identical channel resource for STA1 and STA2, for STA3 distributes other channel resource.Then S360 is performed.
S350, when the channel of STA1 is relevant with the channel of STA2, and when the channel of STA1 is uncorrelated with the channel of STA3, wireless aps can distribute identical channel resource for STA1 and STA3, for STA2 distributes other channel resource.Then S360 is performed.
It should be noted that, after S330, wireless aps, according to the channel relevancy of three STA, can also perform other operation.Such as: if the channel of STA1, STA2 and STA3 is uncorrelated mutually, then wireless aps can distribute identical channel resource for STA1, STA2 and STA3; Or if the channel of STA1, STA2 and STA3 is related, then wireless aps can distribute mutually different channel resource for STA1, STA2 and STA3.
S360, wireless aps sends the second message to STA1, STA2 and STA3, and the second message can be included as the information of the channel resource that STA1, STA2, STA3 distribute.Wireless aps is designated as the information of the channel resource that it distributes to STA by the 2nd CTS message.Wherein, the second described message can be CTS message, also can be RTS message.
Fig. 8 shows the message format schematic diagram of a kind of 2nd CTS message of the embodiment of the present invention, as shown in Figure 8, the MAC layer form of described 2nd CTS message is followed successively by from left to right: FrameControl (control domain), Duration (width) territory, AID (association identification) territory, Sub-ChannelBITMAP (subchannels bitmap) territory, Timelength (time span) territory and FCS (verification) territory.RA (receiver address) territory in CTS message in existing WLAN (wireless local area network) IEEE802.11 redefined into AID territory, Sub-ChannelBITMAP territory and Timelength territory.
AID territory stores the AID of STA; Sub-ChannelBITMAP territory stores the information that wireless aps is the channel resource that STA distributes, storing binary in Sub-ChannelBITMAP territory, each corresponding sub-channels, the figure place in Sub-ChannelBITMAP territory is not less than the number of subchannel, operable channel resource is indicated to STA by default mark (such as, " 1 " or " 0 ").Timelength territory stores the time span that wireless aps is the busy channel resource that STA specifies.
S370, STA1 are that the channel resource that STA1 distributes sends upstream data according to wireless aps, and STA2 is that the channel resource that STA2 distributes sends upstream data according to wireless aps, and STA3 is that the channel resource that STA3 distributes sends upstream data according to wireless aps.
If wireless aps is that the channel resource that STA1 with STA2 distributes is identical, then STA1 and STA2 utilizes identical channel resource to send respective upstream data simultaneously; If wireless aps is that the channel resource that STA1 with STA2 distributes is different, then STA1 and STA2 utilizes respective channel resource transmitted in parallel upstream data separately.
Below in conjunction with the instantiation shown in Fig. 9, the transmitting uplink data process that the present embodiment is corresponding is described:
As shown in Figure 9, STA1, STA2 and STA3 send upstream data to wireless aps, and first wireless aps sends ULTA message, after STA1, STA2 and STA3 receive ULTA message, and a transmitted in parallel CTS message separately.According to the channel-estimation information in a CTS message of each STA, wireless aps judges whether the channel of each STA is correlated with after receiving a CTS message of each STA transmission.Illustrate, the channel of STA2 is uncorrelated with the channel of STA3, and the channel of STA1 is relevant to the channel of STA2.Thus, for STA2 and STA3 distributes identical channel resource, for STA1 distributes the channel resource different from the channel resource of STA2 and STA3.Wireless aps sends the 2nd CTS message to each STA, is designated as the channel resource of each STA distribution by the 2nd CTS message.After each STA receives the 2nd CTS message, utilize wireless aps to be that its channel resource distributed sends upstream data (Data), realize upstream data parallel transmission.As shown in Figure 9, STA2 and STA3 utilizes identical subchannel to send upstream data (Data), and STA1 utilizes and the subchannel difference subchannel of STA2 and STA3 sends upstream data (Data).
The uplink data transmission method that the present embodiment provides, wireless aps determines the correlation of the channel of multiple STA according to the respective channel-estimation information that multiple STA reports, then wireless aps can for channel mutually incoherent at least two STA distribute identical channel resource, same channel resource transmitted in parallel upstream data is used to make the multiple STA being assigned with same channel resource, namely multiple STA uses same time-frequency channel resource to send upstream data, thus the utilization ratio of channel resource when improve uplink.And this uplink data transmission method can realize each STA transmitted in parallel the one CTS message, the holding time to channel resource during minimizing STA transmission the one CTS message, further increases the utilization rate of channel resource.
Middle wireless aps embodiment illustrated in fig. 3 is when sending ULTA message, and whether the STA indicated in uncertain ULTA message has upstream data to need to send, determine that in order to make wireless aps which STA has upstream data to need to send more accurately, whether basis embodiment illustrated in fig. 3 increases wireless aps inquiry STA has upstream data to need the step sent.
As shown in Figure 10, the method can also comprise the following steps before S310 embodiment illustrated in fig. 3:
S410, wireless aps sends up inquiry (ULA, UpLinkAnnounce) message to STA1, STA2, STA3.Whether described ULA message has upstream data to be sent for inquiring about STA1, STA2, STA3.Then S420 is performed.
It should be noted that, up query messages described in various embodiments of the present invention, just be used to refer to the message sent for wireless aps, be not for limiting this message, in specific implementation, whether this up query messages can be other title, as long as have upstream data to be sent comprising for inquiring about N number of STA.
In the present invention one exemplary embodiment, as shown in figure 11, ULA message can be defined as an independently message, independently sent with broadcast mode or multicast mode by wireless aps, the MAC layer form of ULA message is followed successively by from left to right: FrameControl (control domain), Duration (width) territory, RA (receiver address) territory, TA (TransmitterAddress, send address) territory, AIDMAP (association identification figure) territory, NoSC (NumberofSub-Carriers, sub-carrier number) territory, Sub-channeltype (sub-channel types) territory and FCS (verification) territory.
AIDMAP territory can comprise 2008 binary systems, and each corresponding A ID is the STA of respective value, identical with the AIDMAP territory in Fig. 4 (a), repeats no more herein.
NoSC territory stores instruction STA transmission ULR (UpLinkRequest, inquiry response) message and makes used number of subcarriers (channel resource quantity).
Sub-channeltype territory for storing the classified types of subchannel, such as, 20MHz, 40MHz, 80MHz, 160MHz, or the quantity of subcarrier that every sub-channels comprises.
In another exemplary embodiment of the present invention, as shown in figure 12, ULA can be defined as an information element, be included in other message (such as, beacon message Beacon) middle transmission, the MAC layer form of this ULA message is followed successively by from left to right: Element (element) ID territory, Length (length) territory, AIDMAP territory, NoSC territory and Sub-channeltype territory, wherein, ElementID is the identification code of information element, Length territory is used to indicate the message length of this information element, AIDMAP territory, NoSC territory is identical with the implication of same domain in Figure 11 with the implication in Sub-channeltype territory.
S420, STA1 return ULR message according to the described ULA message received to wireless aps, and STA2 returns ULR message according to the described ULA message received to wireless aps, and STA3 returns ULR message according to the described ULA message received to wireless aps.The ULR message that STA1 sends comprises the information whether instruction STA1 has upstream data to send, the ULR message that STA2 sends comprises the information whether instruction STA2 has upstream data to send, and the ULR message that STA3 sends comprises the information whether instruction STA2 has upstream data to send.Then S430 is performed.
The present embodiment all has upstream data to be sent as example with STA1, STA2 and STA3 to be described, the information that instruction STA1 has upstream data to send is comprised in the ULR message that STA1 sends, in like manner, comprise the information that instruction STA2 has upstream data to send in the ULR message that STA2 sends, in the ULR message that STA2 sends, comprise the information that instruction STA2 has upstream data to send.
In other embodiments of the invention, wireless aps sends ULA message to N number of STA, after N number of STA receives described ULA message, return N number of ULR message respectively to wireless aps, in each ULR message, at least comprise the information indicating and return STA corresponding to this ULR message and whether have upstream data to send.
Described ULR message is simple physical layer message, is namely directly modulated on one or more subcarrier by one or more binary bit of information, and the subcarrier combination that wherein each STA uses directly is indicated in ULA message by AP.The different values of these binary messages represent whether STA has the upstream data of buffer memory to need to send, and alternatively, can also comprise the uplink channel resources of upstream data quantity information or STA needs.
Such as, when carrying binary message " 1111 " (or " 0000 ") in ULR message, represent that STA has upstream data to need to send; When carrying binary message " 0000 " (or " 1111 ") in ULR message, represent that STA does not have upstream data to need to send.
S430, the ULR message that wireless aps sends according to STA1, STA2 and STA3, generates the ULTA message being used to indicate and allowing STA1, STA2 and STA3 to send upstream data.
Wireless aps generates corresponding ULTA message after knowing which STA has upstream data to send according to the ULR message that each STA returns, and allows those STA having upstream data to send to send upstream data by the content instruction in AIDMAP territory in ULTA message.
After executing S430, perform follow-up S310 ~ S370, wherein the implementation of S310 ~ S370 is identical with the implementation of above-described embodiment, repeats no more herein.
Below in conjunction with the instantiation shown in Figure 13, the transmitting uplink data process that the present embodiment is corresponding is described:
Wireless aps sends ULA information query STA1, whether STA2, STA3 have upstream data to send, and whether return the instruction of ULR message respectively to wireless aps after STA1, STA2, STA3 receive ULA message self has upstream data to send.Wireless aps defines the STA of upstream data transmission according to each ULR message, in this example, STA1, STA2 and STA3 all have upstream data to send, and then, generate corresponding ULTA information and sending according to each ULR, follow-up message flow is identical with the process shown in Fig. 9, repeats no more herein.
The uplink data transmission method that the present embodiment provides, before wireless aps sends ULTA message, upstream data whether is had to send by ULA information query STA, thus the STA of upstream data transmission is defined according to the ULR message that STA returns, and in ULTA message, generate the indication information indicating the STA having upstream data to send to send upstream data, the STA that the permission that wireless aps is indicated in ULTA message sends upstream data is consistent with the STA that actual needs sends upstream data, the problem avoiding wireless aps to allow the STA sending upstream data not need transmission upstream data to cause channel resource utilization ratio low occurs, improve the utilization ratio of channel resource.
In an alternative embodiment of the invention, with the embodiment shown in Fig. 3 unlike, STA can send a CTS message by time division way, the present embodiment to comprise wireless aps, the application scenarios of STA1, STA2 and STA3 is described.As shown in figure 14, uplink data transmission method can comprise the following steps:
S510, wireless aps sends ULTA message, and ULTA message comprises the information being used to indicate and allowing STA1, STA2 and STA3 to send upstream data.
The form of the ULTA message in the present embodiment is identical with the form of the ULTA message shown in Fig. 4 (a) and Fig. 4 (b), repeats no more herein.
S520, according to described ULTA message, STA1 determines that STA1 sends the temporal information of a CTS message, according to described ULTA message, STA2 determines that STA2 sends the temporal information of a CTS message, according to described ULTA message, STA3 determines that STA3 sends the temporal information of a CTS message.
If the data bit corresponding with the AID of STA presets to mark (such as in the AIDMAP territory of ULTA message, binary one or " 0 "), then show that wireless aps allows STA to send upstream data, and " 1 " order in whole " 1 " in AIDMAP territory corresponding according to the AID of STA determines that self sends the order of the time slot of a CTS message.Wherein, the quantity of time slot is equal with the quantity of " 1 " in AIDMAP territory.
Such as, data bit corresponding with the AID of STA1 in AIDMAP territory is the order of " 1 " is the second, then STA1 can send a CTS message corresponding to STA1 at second time slot.
S530, STA1 can utilize the time of whole channel indicated by temporal information corresponding to STA1 to send a CTS message corresponding to STA1 to wireless aps, and, STA2 can utilize the time of whole channel indicated by temporal information corresponding to STA2 to send a CTS message corresponding to STA2 to wireless aps, and STA3 can utilize the time of whole channel indicated by temporal information corresponding to STA3 to send a CTS message corresponding to STA3 to wireless aps.
The CTS message that STA1 sends at least comprises the channel-estimation information of STA1, and in like manner, the CTS message that STA2 sends at least comprises the channel-estimation information of STA2, and the CTS message that STA3 sends at least comprises the channel-estimation information of STA3.Alternatively, a CTS message can also comprise the uplink transmission information of corresponding STA, to make wireless aps according to the channel-estimation information in a CTS message and uplink transmission information for STA allocation of channel resources.
A CTS message in the present embodiment and embodiment illustrated in fig. 5 in a CTS message unlike, a CTS message of the present embodiment only has a TF territory, and other form is identical with the CTS message format shown in Fig. 5, repeats no more herein.
S540, wireless aps judges the correlation of the channel of the channel of STA1, the channel of STA2 and STA3 according to the channel-estimation information of the channel-estimation information of STA1, the channel-estimation information of STA2 and STA3; According to the correlation of channel, S550 or S560 can be performed respectively.
S550, when the channel of STA1 is uncorrelated with the channel of STA2, and when the channel of STA1 is relevant with the channel of STA3, wireless aps can distribute identical channel resource for STA1 and STA2, for STA3 distributes other channel resource.Then S570 is performed.
S560, when the channel of STA1 is relevant with the channel of STA2, and when the channel of STA1 is uncorrelated with the channel of STA3, wireless aps can distribute identical channel resource for STA1 and STA3, for STA2 distributes other channel resource.Then S570 is performed.
It should be noted that, after S540, wireless aps, according to the channel relevancy of three STA, can also perform other operation.Such as: if the channel of STA1, STA2 and STA3 is uncorrelated mutually, then wireless aps can distribute identical channel resource for STA1, STA2 and STA3; Or if the channel of STA1, STA2 and STA3 is related, then wireless aps can distribute mutually different channel resource for STA1, STA2 and STA3.
S570, wireless aps sends the second message to STA1, STA2 and STA3, and the second message can be included as the information of the channel resource that STA1, STA2, STA3 distribute.Wireless aps is designated as the information of the channel resource that it distributes to STA by the 2nd CTS message.
S580, STA1 are that the channel resource that STA1 distributes sends upstream data according to wireless aps, and STA2 is that the channel resource that STA2 distributes sends upstream data according to wireless aps, and STA3 is that the channel resource that STA3 distributes sends upstream data according to wireless aps.
Wherein, S540 ~ S580 with embodiment illustrated in fig. 3 in S330 ~ S370 identical, repeat no more herein.
Below in conjunction with the instantiation shown in Figure 15, the transmitting uplink data process that the present embodiment is corresponding is described:
In this example, the STA of wireless aps service comprises STA1, STA2, STA3 tri-STA, and wireless aps sends ULTA message to STA1, STA2, STA3, and STA1, STA2 and STA3 send each self-corresponding CTS message according to the order of ULTA message instruction respectively.STA1 sends a CTS message of STA1 at first time window, and STA2 sends a CTS message of STA2 at second time window, and STA3 sends a CTS message of STA3 at the 3rd time window.According to the channel-estimation information in each CTS message, wireless aps judges that the channel of the channel of STA2 and STA3 is uncorrelated, and the channel of STA1 is relevant with the channel of STA2, then distribute identical channel resource for STA2 and STA3, and distribute independently channel resource for STA1.Then, the channel resource of STA1, STA2, STA3 distribution is designated as by the 2nd CTS message.After each STA receives the 2nd CTS message, wireless aps is utilized to be that its channel resource distributed sends upstream data.
The uplink data transmission method that the present embodiment provides, wireless aps determines the correlation of the channel of multiple STA according to the respective channel-estimation information that multiple STA reports, then wireless aps can for channel mutually incoherent at least two STA distribute identical channel resource, same channel resource transmitted in parallel upstream data is used to make the multiple STA being assigned with same channel resource, namely multiple STA uses same time-frequency channel resource to send upstream data, thus the utilization ratio of channel resource when improve uplink.
Similar to the embodiment shown in Figure 10, the basis of the embodiment shown in Figure 14 increases wireless aps inquiry STA the need of the step sending upstream data.As shown in figure 16, described uplink data transmission method can comprise the following steps:
S610, wireless aps sends ULA message to STA1, STA2 and STA3, and whether described ULA message has upstream data to send for inquiring about STA1, STA2 and STA3.
S620, STA1 return ULR message according to the described ULA message received to wireless aps, and STA2 returns ULR message according to the described ULA message received to wireless aps, and STA3 returns ULR message according to the described ULA message received to wireless aps.The ULR message that STA1 sends comprises the information whether instruction STA1 has upstream data to send, the ULR message that STA2 sends comprises the information whether instruction STA2 has upstream data to send, and the ULR message that STA3 sends comprises the information whether instruction STA2 has upstream data to send.
S630, the ULR message that wireless aps sends according to STA1, STA2 and STA3, generates the ULTA message being used to indicate and allowing STA1, STA2 and STA3 to send upstream data.
After performing S630, the specific implementation continuing to perform S510 ~ S580, S510 ~ S580 see the associated description in the corresponding embodiment of Figure 14, can repeat no more herein.
Below in conjunction with the instantiation shown in Figure 17, the transmitting uplink data process that the present embodiment is corresponding is described:
In this example, the STA of wireless aps service comprises STA1, STA2, STA3 tri-STA.Wireless aps sends ULA information query STA1, whether STA2, STA3 have upstream data to send, return each self-corresponding ULR message to wireless aps after STA1, STA2, STA3 receive ULA message, whether ULR message is used to indicate corresponding STA has upstream data to send.Illustrate, according to each ULR message, wireless aps determines that STA1, STA2 and STA3 all have upstream data to send.Then, wireless aps generates corresponding ULTA information and sending according to ULR, and follow-up message flow is identical with the process shown in Figure 14, repeats no more herein.
The uplink data transmission method that the present embodiment provides, before wireless aps sends ULTA message, upstream data whether is had to send by ULA information query STA, thus the STA of upstream data transmission is defined according to the ULR message that STA returns, and in ULTA message, generate the indication information indicating the STA having upstream data to send to send upstream data, the STA that the permission that wireless aps is indicated in ULTA message sends upstream data is consistent with the STA that actual needs sends upstream data, the problem avoiding wireless aps to allow the STA sending upstream data not need transmission upstream data to cause channel resource utilization ratio low occurs, improve the utilization ratio of channel resource.
By the description of above embodiment of the method, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: read-only memory (ROM), random access memory (RAM), magnetic disc or CD etc. various can be program code stored medium.
Corresponding with uplink data transmission method embodiment provided by the invention, present invention also offers a kind of transmitting uplink data device, the operation principle of this transmitting uplink data device and workflow specifically can see said method embodiments.
See Figure 18, show a kind of transmitting uplink data device that the embodiment of the present invention provides, described application of installation is in the first website (STA1), and as shown in figure 18, described device can comprise: receiving element 110 and transmitting element 120.
Receiving element 110, for receiving the uplink Indication message that wireless aps sends, described uplink Indication message comprises the information being used to indicate and allowing described STA1 and at least one other STA to send upstream data.
Transmitting element 120, for sending the first message according to described uplink Indication message to described wireless aps, described first message at least comprises the channel-estimation information of a described STA, to make described wireless aps judge whether the channel of a described STA and the channel of described 2nd STA are correlated with according to the channel-estimation information of a described STA and the channel-estimation information of the 2nd STA, described 2nd STA is a STA at least one other STA described.
In the present embodiment, described transmitting element 120 is specifically for while sending the 3rd message according to described uplink Indication message to described wireless aps at described 2nd STA, and a described STA sends described first message according to described uplink Indication message to described wireless aps; The channel-estimation information of described 2nd STA is at least comprised in described 3rd message.
In an embodiment of the invention, the first message that STA1 sends comprises N number of training domain, N is more than or equal to the quantity allowing the STA sending upstream data in described uplink Indication message, and a training domain in described N number of training domain is for depositing the channel-estimation information of a described STA.
When described transmitting element 120 is for sending the first message according to described uplink Indication message to described wireless aps specifically for: determine the order of a described STA in a described STA and at least one other STA described according to described uplink Indication message; From described N number of training domain, the training domain of corresponding order is selected to deposit the channel-estimation information of a described STA according to described order; Send and comprise the first message of the channel-estimation information of a described STA, wherein, described transmitting element utilizes whole channel resource to send described channel-estimation information in the first message.
In yet another embodiment of the present invention, described first message comprises a training domain, and described training domain is for depositing the channel-estimation information of a described STA.The uplink Indication message that wireless aps sends also comprises the information of the order being used to indicate described first message of a described STA transmission.
When described transmitting element 120 sends the first message according to described uplink Indication message to described wireless aps, specifically for: send described first message according to the described order of described uplink Indication message instruction to described wireless aps.Wherein, described first message comprises a training domain, described training domain for depositing the channel-estimation information of a described STA, or, described first message comprises data field and a described training domain, and described data field is for storing the uplink transmission information of a described STA.
Wherein, when described transmitting element 120 sends described first message according to the described order that described uplink Indication message indicates to described wireless aps, specifically for: determine the order of a described STA in a described STA and at least one other STA described according to described uplink Indication message; The temporal information sending described first message is determined according to described order; The time of whole channel resource indicated by described temporal information is utilized to send described first message to described wireless aps.
In above-mentioned two way of example, during the described channel-estimation information that described transmitting element 120 utilizes whole channel resource to send in the first message, specifically for the channel-estimation information of a STA described in transmitted in parallel on the every sub-channels in described whole channel resource.
Described transmitting element 120 is for determining the order of a described STA in a described STA and at least one other STA described during according to described uplink Indication message, specifically for: obtain default mark corresponding with the association identification of a described STA in described uplink Indication message; A described STA determines that described presetting is marked at indicate in described uplink Indication message whole and presets the order in marking, and using the described order determined as the order of a described STA in a described STA and at least one other STA described.
Alternatively, described first message also comprises the data field for depositing described uplink transmission information.Now, when described transmitting element 120 sends the first message according to described uplink Indication message to described wireless aps, also for: determine that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in described first message in described whole channel resource according to described order; Utilize the described data field in described first message of described subchannel transmission determined.
Described receiving element 110, also for receiving the second message that described wireless aps sends, described second message comprises the information that described wireless aps is the channel resource that a described STA distributes; Described wireless aps is that the incoherent described STA of channel is identical with the channel resource that described 2nd STA distributes.
Described transmitting element 120, the channel resource also for utilizing described wireless aps to distribute sends upstream data.
In another embodiment of the invention, described receiving element 110, also for receiving the up query messages that described wireless aps sends, described up query messages comprises the information whether having upstream data to send for inquiring about a described STA;
Described transmitting element 120, also for returning query response message to described wireless aps, described query response message at least comprises the information that the described STA of instruction has upstream data to send, and generates described uplink Indication message to make described wireless aps according to described query response message.
As seen from the above-described embodiment, according to the channel-estimation information of STA, wireless aps determines whether the channel of multiple STA is correlated with, and distribute identical channel resource for the incoherent STA of channel, on same channel resource, upstream data is sent to make the incoherent STA of multiple channel, the utilization ratio of the channel resource (that is, frequency spectrum) when namely the incoherent STA of multiple channel uses same time-frequency channel resource parallel transmission upstream data to improve uplink.
See Figure 19, show the another kind of transmitting uplink data device that the embodiment of the present invention provides, described application of installation is in the first website (STA1), and as shown in figure 19, described device can comprise: receiver 310, reflector 320 and processor 330.
Wherein, receiver 310 and reflector 320 are for communicating with outside, and receiver 310 is for externally sending information, and reflector 320 is for receiving the outside information sent.
The uplink Indication message that processor 330 is sent for being received WAP (wireless access point) by receiver 310, described uplink Indication message comprises the information being used to indicate and allowing described first website and at least one other website to send upstream data;
Processor 330 is also for sending first message according to described uplink Indication message to described WAP (wireless access point) by reflector 320, described first message at least comprises the channel-estimation information of described first website, to make described WAP (wireless access point) judge whether the channel of described first website and the channel of described second website are correlated with according to the channel-estimation information of described first website and the channel-estimation information of the second website, described second website is a website at least one other website described;
Processor 330 is also for receiving the second message that described WAP (wireless access point) sends by receiver 310, described second message comprises the information that described WAP (wireless access point) is the channel resource that described first website distributes; Described WAP (wireless access point) is that incoherent described first website of channel is identical with the channel resource that described second website distributes;
Processor 330, the channel resource also for utilizing described WAP (wireless access point) to distribute by reflector 320 sends upstream data.
Wherein, when processor 330 sends the first message according to described uplink Indication message to described WAP (wireless access point), processor 330 specifically may be used for, while described second website sends the 3rd message according to described uplink Indication message to described WAP (wireless access point), send described first message by reflector 320 to described WAP (wireless access point) according to described uplink Indication message; The channel-estimation information of described second website is at least comprised in described 3rd message.
Further, described first message comprises N number of training domain, N is more than or equal to the quantity allowing the website sending upstream data in described uplink Indication message, and a training domain in described N number of training domain is for depositing the channel-estimation information of described first website;
When processor 330 sends the first message according to described uplink Indication message to described WAP (wireless access point) specifically for: processor 330 determines the order of described first website in described first website and at least one other website described according to described uplink Indication message; From described N number of training domain, the training domain of corresponding order is selected to deposit the channel-estimation information of described first website according to described order; From described N number of training domain, the training domain of corresponding order is selected to deposit the channel-estimation information of described first website according to described order; And sent by reflector 320 and comprise the first message of the channel-estimation information of described first website, wherein, processor 330 can utilize whole channel resource to send described channel-estimation information in the first message by reflector 320.
Further, described first message also comprises the data field for depositing described uplink transmission information.When processor 330 sends the first message according to described uplink Indication message to described WAP (wireless access point), also for: determine that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in described first message in described whole channel resource according to described order; The described subchannel that utilization is determined sends the described data field in described first message by reflector 320.
Further, during the described channel-estimation information that processor 330 utilizes whole channel resource to send in the first message, specifically for the every sub-channels in described whole channel resource passing through the channel-estimation information of the first website described in reflector 320 transmitted in parallel.
Further, when processor 330 determines the order of described first website in described first website and at least one other website described according to described uplink Indication message, specifically for: obtain default mark corresponding with the association identification of described first website in described uplink Indication message; Determine that described presetting is marked at indicate in described uplink Indication message whole and presets the order in marking, and using the described order determined as the order of described first website in described first website and at least one other website described.
Further, when the channel resource that processor 330 utilizes described WAP (wireless access point) to distribute sends upstream data, specifically for: while the channel resource transmission upstream data that described second website utilizes described WAP (wireless access point) to distribute, the channel resource utilizing described WAP (wireless access point) to distribute sends upstream data by reflector 320.
Further, processor 330 is also for receiving the up query messages that described WAP (wireless access point) sends by receiver 310, described up query messages comprises the information whether having upstream data to send for inquiring about described first website; And return query response message by reflector 320 to described WAP (wireless access point), described query response message at least comprises the information that described first website of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described query response message.
Corresponding to above-mentioned channel resource allocation method, the embodiment of the present invention additionally provides channel resource allocation device, and the operation principle of this channel resource allocation device and workflow specifically can see said method embodiments.
See Figure 20, show a kind of channel resource allocation device that the embodiment of the present invention provides, described application of installation is in wireless aps, and described device can comprise: transmitting element 210, receiving element 220, channel estimating unit 230 and channel resource allocation unit 240.
Transmitting element 210, for sending uplink Indication message, described uplink Indication message comprises the information being used to indicate and allowing N number of STA to send upstream data, N >=2, and N is integer.
Receiving element 220, for receiving N number of channel-estimation information that described N number of STA sends respectively according to described uplink Indication message;
Channel estimating unit 230, for judging the correlation of the channel of described N number of STA according to the described N number of channel-estimation information received;
Channel resource allocation unit 240, for for channel in described N number of STA mutually incoherent at least two STA distribute identical channel resource, with make described channel mutually incoherent at least two STA utilize identical channel resource to send upstream data simultaneously.
Described channel resource allocation unit 240 at least two STA also for being correlated with for channel in described N number of STA distribute different channel resources.
In another embodiment of the present invention, described transmitting element 210 is also for sending up query messages, and described up query messages has upstream data to be sent for inquiring about which STA.
Described receiving element 220 is also for receiving N number of query response message that described N number of STA returns respectively, each described query response message at least comprises the information that STA corresponding to the described query response message of instruction has upstream data to send, and generates described uplink Indication message to make described wireless aps according to described N number of query response message that described N number of STA returns respectively.
Described receiving element 220 can be the structure that network element etc. has certain transfer function.
The channel resource allocation application of installation that the present embodiment provides, in wireless aps, sends ULTA message by transmitting element to STA.The message comprising own channel estimated information returned by receiving element reception STA.Judged the channel whether correlation of the channel of STA1 and STA2 according to the channel-estimation information of STA1 and the channel-estimation information of STA2 by channel estimating unit.If the channel of the channel of STA1 and STA2 is uncorrelated, channel resource allocation unit can be the identical channel resource that STA1 with STA2 distributes, same channel resource is used to send upstream data to make STA1 and STA2, namely STA1 and STA2 can utilize same time-frequency channel resource, thus the utilization ratio of channel resource when improve uplink.
See Figure 21, show the another kind of channel resource allocation device that the embodiment of the present invention provides, described application of installation is in wireless aps, and described device can comprise: receiver 410, reflector 420 and processor 430.
Wherein, receiver 410 and reflector 420 are for communicating with outside, and receiver 410 is for externally sending information, and reflector 420 is for receiving the outside information sent.
Processor 430 is for sending uplink Indication message by reflector 420, and described uplink Indication message comprises the information being used to indicate and allowing N number of website to send upstream data, N >=2, and N is integer; N number of channel-estimation information that described N number of website sends respectively according to described uplink Indication message is received by receiver 410; And the correlation of the channel of described N number of website is judged according to the described N number of channel-estimation information received; And for channel in described N number of website mutually incoherent at least two websites distribute identical channel resource, with make described channel mutually incoherent at least two websites utilize identical channel resource to send upstream data simultaneously.
Further, processor 430 is also for sending up query messages by reflector 420, and described up query messages has upstream data to be sent for inquiring about which website; And receive by receiver 410 N number of query response message that described N number of website returns respectively, each described query response message at least comprises the information that website corresponding to the described query response message of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described N number of query response message that described N number of website returns respectively.
Further, at least two websites of processor 430 also for being correlated with for channel in described N number of website distribute different channel resources.
The embodiment of the present invention also provides a kind of terminal equipment, and this terminal equipment can comprise the transmitting uplink data device shown in above-mentioned Figure 18 or Figure 19.Certainly other module in general terminal equipment can also be comprised in this terminal equipment; Such as: when this terminal equipment is mobile phone, this terminal equipment can also comprise: display screen, gravity sensor, memory etc.
The embodiment of the present invention also provides a kind of radio reception device, and this radio reception device can comprise the channel resource allocation device shown in above-mentioned Figure 20 or Figure 21.This radio reception device can access wireless wide area network, and can provide WLAN (wireless local area network).Such as this radio reception device can be wireless router.When this radio reception device is wireless router, this radio reception device can also comprise wireless router general some other module or unit.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device or system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.Device embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The present invention can describe in the general context of computer executable instructions, such as program module.Usually, program module comprises the routine, program, object, assembly, data structure etc. that perform particular task or realize particular abstract data type.Also can put into practice the present invention in a distributed computing environment, in these distributed computing environment (DCE), be executed the task by the remote processing devices be connected by communication network.In a distributed computing environment, program module can be arranged in the local and remote computer-readable storage medium comprising memory device.
It should be noted that, in this article, the such as relational terms of " first " and " second " etc. and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The above is only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (26)

1. a uplink data transmission method, is characterized in that, comprising:
First website receives the uplink Indication message that WAP (wireless access point) sends, and described uplink Indication message comprises the information being used to indicate and allowing described first website and at least one other website to send upstream data;
Described first website sends the first message according to described uplink Indication message to described WAP (wireless access point), described first message at least comprises the channel-estimation information of described first website, to make described WAP (wireless access point) judge whether the channel of described first website and the channel of described second website are correlated with according to the channel-estimation information of described first website and the channel-estimation information of the second website, described second website is a website at least one other website described;
Described first website receives the second message that described WAP (wireless access point) sends, and described second message comprises the information that described WAP (wireless access point) is the channel resource that described first website distributes; Described WAP (wireless access point) is that incoherent described first website of channel is identical with the channel resource that described second website distributes;
The channel resource that described first website utilizes described WAP (wireless access point) to distribute sends upstream data.
2. method according to claim 1, is characterized in that, described first website sends the first message according to described uplink Indication message to described WAP (wireless access point), comprising:
While described second website sends the 3rd message according to described uplink Indication message to described WAP (wireless access point), described first website sends described first message according to described uplink Indication message to described WAP (wireless access point); The channel-estimation information of described second website is at least comprised in described 3rd message.
3. method according to claim 2, it is characterized in that, described first message that described first website sends comprises N number of training domain, N is more than or equal to the quantity allowing the website sending upstream data in described uplink Indication message, and a training domain in described N number of training domain is for depositing the channel-estimation information of described first website;
Described first website sends described first message according to described uplink Indication message to described WAP (wireless access point), comprising:
Described first website determines the order of described first website in described first website and at least one other website described according to described uplink Indication message;
Described first website selects the training domain of corresponding order to deposit the channel-estimation information of described first website according to described order from described N number of training domain;
Described first website sends and comprises the first message of the channel-estimation information of described first website, and wherein, described first website utilizes whole channel resource to send described channel-estimation information in the first message.
4. method according to claim 3, is characterized in that, described first message also comprises the data field for depositing uplink transmission information;
Described first website sends described first message according to described uplink Indication message to described WAP (wireless access point), also comprises:
According to described order, described first website determines that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in described first message in described whole channel resource;
Described first website utilizes the described data field in described first message of described subchannel transmission determined.
5. the method according to claim 3 or 4, is characterized in that, described first website utilizes the channel-estimation information in described first message of whole channel resource transmission, comprising:
The channel-estimation information of the first website described in transmitted in parallel on every sub-channels of described first website in described whole channel resource.
6. method according to claim 1, is characterized in that, described uplink Indication message also comprises the information of the order being used to indicate described first message of described first website transmission;
Described first website sends the first message according to described uplink Indication message to described WAP (wireless access point), comprising:
The described order that described first stop point indicates according to described uplink Indication message sends described first message to described WAP (wireless access point), described first message comprises a training domain, described training domain is for depositing the channel-estimation information of described first website, or, described first message comprises data field and a described training domain, and described data field is for storing the uplink transmission information of described first website.
7. method according to claim 6, is characterized in that, the described order that described first stop point indicates according to described uplink Indication message sends described first message to described WAP (wireless access point), comprising:
Described first website determines the order of described first website in described first website and at least one other website described according to described uplink Indication message;
Described first website determines according to described order the temporal information sending described first message;
Described first website utilizes the time of whole channel resource indicated by described temporal information to send described first message to described WAP (wireless access point).
8. the method according to claim 3 or 7, is characterized in that, described first website determines the order of described first website in described first website and at least one other website described according to described uplink Indication message, comprising:
Default mark corresponding with the association identification of described first website in uplink Indication message described in described first station for acquiring;
Described first website determines that described presetting is marked at indicate in described uplink Indication message whole and presets the order in marking, and using the described order determined as the order of described first website in described first website and at least one other website described.
9., according to the arbitrary described method of claim 1-8, it is characterized in that, the channel resource that described first website utilizes described WAP (wireless access point) to distribute sends upstream data, comprising:
While the channel resource transmission upstream data that described second website utilizes described WAP (wireless access point) to distribute, the channel resource that described first website utilizes described WAP (wireless access point) to distribute sends upstream data.
10., according to the arbitrary described method of claim 1-9, it is characterized in that, receive the uplink Indication message of WAP (wireless access point) transmission at the first website before, described method also comprises:
Described first website receives the up query messages that described WAP (wireless access point) sends, and described up query messages comprises the information whether having upstream data to send for inquiring about described first website;
Described first website returns query response message to described WAP (wireless access point), described query response message at least comprises the information that described first website of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described query response message.
11. 1 kinds of channel resource allocation methods, is characterized in that, comprising:
WAP (wireless access point) sends uplink Indication message, and described uplink Indication message comprises the information being used to indicate and allowing N number of website to send upstream data, N >=2, and N is integer;
Described WAP (wireless access point) receives N number of channel-estimation information that described N number of website sends respectively according to described uplink Indication message;
Described WAP (wireless access point) judges the correlation of the channel of described N number of website according to the described N number of channel-estimation information received;
Described WAP (wireless access point) be in described N number of website channel mutually incoherent at least two websites distribute identical channel resource, with make described channel mutually incoherent at least two websites utilize identical channel resource to send upstream data simultaneously.
12. methods according to claim 11, is characterized in that, before WAP (wireless access point) sends uplink Indication message, described method also comprises:
Described WAP (wireless access point) sends up query messages, and described up query messages has upstream data to be sent for inquiring about which website;
Described WAP (wireless access point) receives N number of query response message that described N number of website returns respectively, each described query response message at least comprises the information that website corresponding to the described query response message of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described N number of query response message that described N number of website returns respectively.
13. methods according to claim 11 or 12, it is characterized in that, described method also comprises:
Described WAP (wireless access point) is that at least two websites that in described N number of website, channel is correlated with distribute different channel resources.
14. 1 kinds of transmitting uplink data devices, are applied in the first website, it is characterized in that, described device comprises:
Receiving element, for receiving the uplink Indication message that WAP (wireless access point) sends, described uplink Indication message comprises the information being used to indicate and allowing described first website and at least one other website to send upstream data;
Transmitting element, for sending the first message according to described uplink Indication message to described WAP (wireless access point), described first message at least comprises the channel-estimation information of described first website, to make described WAP (wireless access point) judge whether the channel of described first website and the channel of described second website are correlated with according to the channel-estimation information of described first website and the channel-estimation information of the second website, described second website is a website at least one other website described;
Described receiving element, also for receiving the second message that described WAP (wireless access point) sends, described second message comprises the information that described WAP (wireless access point) is the channel resource that described first website distributes; Described WAP (wireless access point) is that incoherent described first website of channel is identical with the channel resource that described second website distributes;
Described transmitting element, the channel resource also for utilizing described WAP (wireless access point) to distribute sends upstream data.
15. devices according to claim 14, it is characterized in that, when described transmitting element is used for sending the first message according to described uplink Indication message to described WAP (wireless access point), specifically for, while described second website sends the 3rd message according to described uplink Indication message to described WAP (wireless access point), send described first message according to described uplink Indication message to described WAP (wireless access point); The channel-estimation information of described second website is at least comprised in described 3rd message.
16. devices according to claim 15, it is characterized in that, described first message comprises N number of training domain, N is more than or equal to the quantity allowing the website sending upstream data in described uplink Indication message, and a training domain in described N number of training domain is for depositing the channel-estimation information of described first website;
Described transmitting element be used for when sending the first message according to described uplink Indication message to described WAP (wireless access point) specifically for:
The order of described first website in described first website and at least one other website described is determined according to described uplink Indication message;
From described N number of training domain, the training domain of corresponding order is selected to deposit the channel-estimation information of described first website according to described order;
Send and comprise the first message of the channel-estimation information of described first website, wherein, described transmitting element utilizes whole channel resource to send described channel-estimation information in the first message.
17. devices according to claim 16, is characterized in that, described first message also comprises the data field for depositing described uplink transmission information;
When described transmitting element sends the first message according to described uplink Indication message to described WAP (wireless access point), also for:
Determine that described subchannel is the set comprising one or more subcarrier for sending the subchannel of the data field in described first message in described whole channel resource according to described order;
Utilize the described data field in described first message of described subchannel transmission determined.
18. devices according to claim 16 or 17, it is characterized in that, during the described channel-estimation information that described transmitting element utilizes whole channel resource to send in the first message, specifically for the channel-estimation information of the first website described in transmitted in parallel on the every sub-channels in described whole channel resource.
19. devices according to claim 16, is characterized in that, when described transmitting element is used for determining the order of described first website in described first website and at least one other website described according to described uplink Indication message, specifically for:
Obtain default mark corresponding with the association identification of described first website in described uplink Indication message;
Determine that described presetting is marked at indicate in described uplink Indication message whole and presets the order in marking, and using the described order determined as the order of described first website in described first website and at least one other website described.
20. devices according to any one of claim 14-19, it is characterized in that, when described transmitting element sends upstream data for the channel resource utilizing described WAP (wireless access point) and distribute, specifically for: while the channel resource transmission upstream data that described second website utilizes described WAP (wireless access point) to distribute, the channel resource utilizing described WAP (wireless access point) to distribute sends upstream data.
21. devices according to any one of claim 14-20, is characterized in that:
Described receiving element, also for receiving the up query messages that described WAP (wireless access point) sends, described up query messages comprises the information whether having upstream data to send for inquiring about described first website;
Described transmitting element, also for returning query response message to described WAP (wireless access point), described query response message at least comprises the information that described first website of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described query response message.
22. 1 kinds of upper signal channel resource allocation devices, are applied to WAP (wireless access point), it is characterized in that, comprising:
Transmitting element, for sending uplink Indication message, described uplink Indication message comprises the information being used to indicate and allowing N number of website to send upstream data, N >=2, and N is integer;
Receiving element, for receiving N number of channel-estimation information that described N number of website sends respectively according to described uplink Indication message;
Channel estimating unit, the described N number of channel-estimation information for receiving according to described receiving element judges the correlation of the channel of described N number of website;
Channel resource allocation unit, for for channel in described N number of website mutually incoherent at least two websites distribute identical channel resource, with make described channel mutually incoherent at least two websites utilize identical channel resource to send upstream data simultaneously.
23. devices according to claim 22, is characterized in that:
Described transmitting element, also for sending up query messages, described up query messages has upstream data to be sent for inquiring about which website;
Described receiving element, also for receiving N number of query response message that described N number of website returns respectively, each described query response message at least comprises the information that website corresponding to the described query response message of instruction has upstream data to send, and generates described uplink Indication message to make described WAP (wireless access point) according to described N number of query response message that described N number of website returns respectively.
24. devices according to claim 22 or 23, is characterized in that:
Described channel resource allocation unit, at least two websites also for being correlated with for channel in described N number of website distribute different channel resources.
25. 1 kinds of terminal equipments, described terminal equipment is the first website, and described terminal equipment comprises the arbitrary described transmitting uplink data device of claim 14-21.
26. 1 kinds of wireless access devices, comprise the arbitrary described upper signal channel resource allocation device of claim 22-24.
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