CN105281864A - Data transmission method and device - Google Patents

Data transmission method and device Download PDF

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Publication number
CN105281864A
CN105281864A CN201410240524.8A CN201410240524A CN105281864A CN 105281864 A CN105281864 A CN 105281864A CN 201410240524 A CN201410240524 A CN 201410240524A CN 105281864 A CN105281864 A CN 105281864A
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China
Prior art keywords
message
sta
send
rts
rts message
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CN201410240524.8A
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CN105281864B (en
Inventor
树贵明
陆苏
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201410240524.8A priority Critical patent/CN105281864B/en
Priority to PCT/CN2015/080124 priority patent/WO2015180671A1/en
Publication of CN105281864A publication Critical patent/CN105281864A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/08Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Abstract

The invention discloses a data transmission method and device, and aims at reducing occupation of bits in CTS messages and avoiding an interference problem when multiple STAs use the same channel in a time division way. The method comprises the steps that an AP receives RTS messages transmitted by multiple STAs; the CTS messages are transmitted to at least two STAs when the same channel time frequency resources are allocated to at least two STAs of multiple STAs according to the RTS messages transmitted by multiple STAs; and the CTS messages transmitted to at least two STAs include channel time frequency resource information allocated to at least two STAs and interleaved sequence information and/or spread spectrum sequence information, and the channel time frequency resource information allocated to each STA of at least two STAs is the same and the interleaved sequence information and/or the spread spectrum sequence information are different.

Description

A kind of data transmission method and device
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of data transmission method and device.
Background technology
At WLAN (wireless local area network) (WirelessLocalAreaNetwork, WLAN) in, website (Station, STA) usually battery saving mode is worked in, when STA works in battery saving mode, its operating state is alternately changed reviving between (Awake) state and sleep (Doze) state according to certain rule, is usually in Doze state when STA does not send data, to reduce electric quantity consumption, but STA then enters Awake state when there being data to send.
In a wlan, because the numerous websites (Station, STA) in same Basic Service Set (BasicServiceSet, BSS) share a channel.As shown in Figure 1, for adopting RTS/CTS message to obtain the schematic diagram of the mechanism of channel right to use transmission data Data for STA in prior art, and Fig. 2 a and Fig. 2 b is respectively the frame format schematic diagram of RTS message and CTS message in prior art, wherein, RTS frame and CTS frame all belong to the medium education (MediaAccessControl in Frame, MAC) frame (only depict the frame head part of mac frame in Fig. 2 a and Fig. 2 b, data division and trailer sections do not draw).When certain STA (can become source STA) needs to access point (AccessPoint, when AP) sending data, usually first send a request by competition mechanism and send (RequestToSend, RTS) message, and at the channel time that duration (Duration) territory of RTS message oneself follow-up transmission data of instruction will take, so that periphery receives other STA of RTS message (network allocation vector (NetworkAllocationVector in as Fig. 1 within the time that the Duration territory of RTS message indicates, NAV) in the time that (RTS) represents) do not remove busy channel.When AP is at short frame period (ShortInterframeSpace, SIFS) after receiving the RTS message of STA transmission after the time, broadcast transmission confirms to send (ClearToSend, CTS) message, and the time value corresponding with the Duration territory of RTS message is set in the Duration territory of CTS message, not receive RTS message but (in the time that in as Fig. 1, NAV (CTS) represents) no longer busy channel in other STA that can receive CTS message time that yet can indicate in the Duration territory of CTS message, in the time that the STA of the initial like this RTS of have sent message just can indicate in the Duration territory of RTS message, data are sent to AP.DIFS wherein in Fig. 1 is distributed coordination frame period, also can referred to as DCF-IFS (DistributedcoordinationfunctionInterFrameSpace).
In order to improve the utilization ratio of channel spectrum, increase the throughput of AP, beamforming technique is introduced when downlink data transmission from 802.11n standard, can on the same channel simultaneously to the STA transmitted in parallel downlink data being positioned at different azimuth by this technology AP, to improve the utilization ratio of channel spectrum.
Although can distribute different channel resources for multiple STA by this technology AP simultaneously, improve the utilization ratio of channel spectrum, this technology remains in following defect:
When the uplink channel resources that STA needs is less, plural STA may be arranged on same subchannel in the mode of time-division by AP, as shown in Figure 3, in this case by there are the following problems: the mode of first this allocation of channel resources indicates sub-channel identification except needing in CTS message, outside subchannel duration, also need to indicate the time started using subchannel, this just needs to take more bit (Bit) position in CTS message, but in order to the STA before making can correctly resolve CTS message, the length of CTS message can not be increased again, so bit available in CTS message is very limited, secondly, when two STA share a sub-channels in the mode of time-division, if previous STA is not owing to receiving CTS message, and when not using the transmission data for the previous period of the subchannel of specifying, mode by competition is taken that this sub-channels is concurrent send data by other STA, may affect so next a rear STA to the use of this sub-channels.
Summary of the invention
The embodiment of the present invention provides a kind of data transmission method and device, to reduce taking bit in CTS message, and avoids multiple STA to use the interference problem existed during same channel in a time division manner.
The embodiment of the present invention is by the following technical solutions:
First aspect, provides a kind of data transmission method, comprising:
Access point AP receives the request transmission RTS message that multiple site STA sends;
The RTS message that described AP sends according to described multiple STA, at least two STA in described multiple STA distribute identical channel running time-frequency resource time, send to described at least two STA and confirm to send CTS message; Wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in described at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information are different, send the upstream data after different interleaved sequences and/or frequency expansion sequence process with at least two STA described in enabling on identical channel running time-frequency resource to described AP simultaneously.
In conjunction with first aspect, in the first implementation, CTS message is sent to described at least two STA, wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, specifically comprise:
Send CTS message respectively to described at least two STA, wherein, in each CTS message, be included as the channel running time-frequency resource information that the STA that receives this CTS message distributes, and interleaved sequence information and/or frequency expansion sequence information.
In conjunction with the first implementation of first aspect or first aspect, in the second implementation, before AP receives the RTS message that multiple STA sends, described method also comprises:
AP sends beacon message, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Described AP sends uplink synchronous Indication message in described transmitting time, comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
AP receives the RTS message that multiple STA sends, and specifically comprises:
AP receives the RTS message that multiple STA sends; Wherein, described multiple STA needs to send upstream data and according to the uplink synchronous Indication message determination self identification received and the described STA allowing the identification information of the STA sending RTS message to match.
In conjunction with the second implementation of first aspect, in the third implementation, described beacon message comprises the information of limiting access window RAW, so as the STA receiving described beacon message in described RAW no longer with the mode access channel of competition;
Wherein, the sart point in time of described RAW is the transmitting time of described uplink synchronous Indication message.
In conjunction with the second implementation of first aspect or the third implementation of first aspect, in the 4th kind of implementation, RTS message send opportunity information is carried, so that the send opportunity that the STA being allowed to send RTS message can use described RTS message send opportunity information to indicate sends RTS message in described beacon message or described uplink synchronous Indication message; Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
Second aspect, provides a kind of data transmission method, comprising:
Send request to access point AP and send RTS message;
Receive the CTS message of described AP according to described RTS message feedback; Wherein, when described AP is the transmit leg of described RTS message and the transmit leg of at least one other RTS message is assigned with identical channel running time-frequency resource, the channel running time-frequency resource information identical with the transmit leg of at least one other RTS message described that described AP distributes is comprised in described CTS message, and the interleaved sequence information different from the transmit leg of at least one other RTS message described and/or frequency expansion sequence information;
Utilize the interleaved sequence of described interleaved sequence information and/or the instruction of frequency expansion sequence information and/or frequency expansion sequence to carry out interleaving treatment and/or spread processing to data to be sent, and the data after process are sent to described AP by described channel running time-frequency resource.
In conjunction with second aspect, in the first implementation, before sending RTS message to AP, described method also comprises:
Receive the beacon message that described AP sends, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Receive the uplink synchronous Indication message of described AP transmission in described transmitting time, in described uplink synchronous Indication message, comprise the identification information allowing the STA sending RTS message; Then
Send RTS message to AP, specifically comprise:
According to described uplink synchronous Indication message, determine that self identification and the described identification information of the STA sending RTS message that allows match, and when having upstream data to be sent, send RTS message to AP.
In conjunction with the first implementation of first aspect, in the second implementation, in described beacon message or described uplink synchronous Indication message, carry RTS message send opportunity information;
Send RTS message to access point AP, specifically comprise:
The send opportunity using described RTS message send opportunity information to indicate sends RTS message to described AP.
In conjunction with the second implementation of first aspect, in the third implementation, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
The third aspect, provides a kind of data transmission device, comprising:
RTS message reception units, the request sent for receiving multiple site STA sends RTS message;
CTS message sending unit, for the RTS message that the described multiple STA received according to RTS message reception units send, for at least two STA in described multiple STA distribute identical channel running time-frequency resource time, send to described at least two STA and confirm to send CTS message; Wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in described at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information are different, send the upstream data after different interleaved sequences and/or frequency expansion sequence process with at least two STA described in enabling on identical channel running time-frequency resource to described AP simultaneously.
In conjunction with the third aspect, in the first implementation, described CTS message sending unit, specifically for:
Send CTS message respectively to described at least two STA, wherein, in each CTS message, be included as the channel running time-frequency resource information that the STA that receives this CTS message distributes, and interleaved sequence information and/or frequency expansion sequence information.
In conjunction with the first implementation of the third aspect or the third aspect, in the second implementation, described device also comprises:
Beacon message transmitting element, for sending beacon message, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Uplink synchronous Indication message transmitting element, sends uplink synchronous Indication message for the transmitting time indicated at beacon message transmitting element, comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
Described RTS message reception units, specifically for:
Receive the RTS message that multiple STA sends; Wherein, described multiple STA needs to send upstream data and according to the uplink synchronous Indication message determination self identification received and the described STA allowing the identification information of the STA sending RTS message to match.
In conjunction with the second implementation of the third aspect, in the third implementation, described beacon message comprises the information of limiting access window RAW, so as the STA receiving described beacon message in described RAW no longer with the mode access channel of competition;
Wherein, the sart point in time of described RAW is the transmitting time of described uplink synchronous Indication message.
In conjunction with the second implementation of the third aspect or the third implementation of the third aspect, in the 4th kind of implementation, RTS message send opportunity information is carried, so that the send opportunity that the STA being allowed to send RTS message can use described RTS message send opportunity information to indicate sends RTS message in described beacon message or described uplink synchronous Indication message; Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
Fourth aspect, provides a kind of data transmission device, comprising:
RTS message sending unit, sends RTS message for sending request to access point AP;
CTS message reception units, for receiving the CTS message of described AP according to described RTS message feedback; Wherein, when described AP is the transmit leg of described RTS message and the transmit leg of at least one other RTS message is assigned with identical channel running time-frequency resource, the channel running time-frequency resource information identical with the transmit leg of at least one other RTS message described that described AP distributes is comprised in described CTS message, and the interleaved sequence information different from the transmit leg of at least one other RTS message described and/or frequency expansion sequence information;
Data transmission unit, interleaved sequence and/or the frequency expansion sequence of the described interleaved sequence information comprised for utilizing CTS message reception units and/or the instruction of frequency expansion sequence information carry out interleaving treatment and/or spread processing to data to be sent, and the data after process are sent to described AP by described channel running time-frequency resource.
In conjunction with fourth aspect, in the first implementation, described device also comprises:
Beacon message receiving element, before sending request transmission RTS message in described RTS message sending unit to access point AP, receives the beacon message that described AP sends, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Uplink synchronous Indication message receiving element, the transmitting time for indicating at described beacon message receives the uplink synchronous Indication message that described AP sends, and comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
Described RTS message sending unit, specifically for:
According to described uplink synchronous Indication message, determine that self identification and the described identification information of the STA sending RTS message that allows match, and when having upstream data to be sent, send RTS message to AP.
In conjunction with the first implementation of fourth aspect, in the second implementation, in described beacon message or described uplink synchronous Indication message, carry RTS message send opportunity information;
Described RTS message sending unit, specifically for:
The send opportunity using described RTS message send opportunity information to indicate sends RTS message to described AP.
In conjunction with the second implementation of fourth aspect, in the third implementation, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
The beneficial effect of the embodiment of the present invention is as follows:
In the embodiment of the present invention, by distributing identical channel running time-frequency resource and different frequency expansion sequences and/or interleaved sequence at least two STA, make these at least two STA can transmit the upstream data after different interleaved sequences and/or frequency expansion sequence process on same channel running time-frequency resource.Because these at least two STA can share same channel running time-frequency resource, so the time started without the need to indicating each STA to use the channel distributed in CTS message, and STA can default Start Time be receive this CTS message after preset a time, therefore do not need to take more bit in CTS message, multiple STA can also be avoided to use the interference problem existed during same channel in a time division manner simultaneously.
Accompanying drawing explanation
Fig. 1 adopts RTS/CTS message to obtain the schematic diagram of the mechanism of channel right to use transmission data for STA in prior art;
Fig. 2 a is the frame format schematic diagram of RTS message in prior art;
Fig. 2 b is the frame format schematic diagram of CTS message in prior art;
Fig. 3 be in prior art transfer of data realize schematic diagram;
The principle flow chart of a kind of data transmission method that Fig. 4 provides for the embodiment of the present invention;
The principle flow chart of a kind of data transmission method that Fig. 5 provides for the embodiment of the present invention;
What Fig. 6 was a kind of data transmission method of providing in the embodiment of the present invention one realizes schematic diagram;
The frame format schematic diagram of RTS message of Fig. 7 for providing in the embodiment of the present invention one;
The frame format schematic diagram of CTS message of Fig. 8 for providing in the embodiment of the present invention one;
What Fig. 9 was a kind of data transmission method of providing in the embodiment of the present invention two realizes schematic diagram;
The structural representation of a kind of data transmission device that Figure 10 provides for the embodiment of the present invention;
The hardware structure diagram of a kind of data transmission device that Figure 11 provides for the embodiment of the present invention;
The structural representation of a kind of data transmission method that Figure 12 provides for the embodiment of the present invention;
The hardware structure diagram of a kind of data transmission device that Figure 13 provides for the embodiment of the present invention.
Embodiment
In order to solve problems of the prior art, in the embodiment of the present invention, propose a kind of data transmission scheme.In this technical scheme, by distributing identical channel running time-frequency resource and different frequency expansion sequences and/or interleaved sequence at least two STA, make these at least two STA can transmit the upstream data after different interleaved sequences and/or frequency expansion sequence process on same channel running time-frequency resource.Because these at least two STA can share same channel running time-frequency resource, so share the time started of the channel of each STA use distribution of same channel without the need to instruction in CTS message, and STA can default Start Time be the time of presetting after receiving this CTS message, therefore do not need to take more bit in CTS message, multiple STA can also be avoided to use the interference problem existed during same channel in a time division manner simultaneously.
Below in conjunction with Figure of description, embodiments of the invention are described, should be appreciated that embodiment described herein is only for instruction and explanation of the present invention, is not limited to the present invention.And when not conflicting, the embodiment in the present invention and the feature of embodiment can be combined with each other.
The embodiment of the present invention proposes a kind of data transmission method, and as shown in Figure 4, be the principle flow chart of the method, the executive agent of the method can be, but not limited to as access point AP, and the method specifically comprises the steps:
Step 41, AP receives the RTS message that multiple STA sends;
Wherein, RTS message is used for AP request channels running time-frequency resource;
Optionally, can also comprise before step 41:
First, AP transmission beacon Beacon message, the transmitting time of instruction uplink synchronous Indication message, makes the STA needing to send upstream data can keep Awake state in the transmitting time of instruction, can receive the uplink synchronous Indication message of AP transmission.
Further, the information of limiting access window (RestrictedAccessWindow, RAW) in this Beacon message, can also be comprised, so as the STA receiving this Beacon message in this RAW no longer with the mode access channel of competition; Wherein, this RAW comprises sart point in time and end time point, and its sart point in time can be the transmitting time of the uplink synchronous Indication message of instruction.
It should be noted that, the transmitting time of uplink synchronous Indication message also can prior to the sart point in time of RAW, but because STA can enter Awake state in the transmitting time of uplink synchronous Indication message, and the time entering Awake state is more late, electric quantity consumption is fewer, therefore in the embodiment of the present invention in order to enable STA reduce electric quantity consumption to greatest extent, the transmitting time of setting uplink synchronous Indication message is the sart point in time of RAW.
Secondly, AP sends uplink synchronous Indication message in the transmitting time of instruction, comprise the identification information allowing the STA sending RTS message in this up Indication message, make the STA needing to send upstream data according to this identification information, can judge whether self can send RTS message to AP.
Optionally, RTS message send opportunity information can also be carried, so that the send opportunity that the STA being allowed to send RTS message can use this RTS message send opportunity information to indicate is to send RTS message in above-mentioned Beacon message or uplink synchronous Indication message.
The send opportunity of this RTS message send opportunity information instruction can be, but not limited to comprise:
STA send RTS message can subchannel, and service time of every sub-channels, every sub-channels can comprise one or more subcarrier; Or
When STA uses whole channel to send RTS message, at least one available time slot.
In addition, AP is after the transmitting time of instruction sends uplink synchronous Indication message, if do not receive the RTS message that any STA sends, then AP needs to revise the identification information that the permission comprised in uplink synchronous Indication message sends the STA of RTS message, and resend amended uplink synchronous Indication message, until STA is had to have sent RTS message.
Concrete, allow the identification information of the STA sending RTS message to can be, but not limited to as following representation:
First association identification (AssociationIdentifier, AID), and the predetermined number of AID after an AID, with the STA that the AID of predetermined number after limiting an an AID and AID is corresponding; Or
2nd AID and the 3rd AID, to limit the STA of the AID instruction between the 2nd AID and the 3rd AID; Or
The group identification information of one group of STA.
Step 42, when the RTS message that AP sends according to multiple STA, at least two STA in multiple STA distribute identical channel running time-frequency resource time, send CTS message to these at least two STA;
Wherein, the channel running time-frequency resource information that these at least two STA distribute is included as in the CTS message that these at least two STA send, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in these at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information difference, send the upstream data after different interleaved sequences and/or frequency expansion sequence process to AP to enable these at least two STA on identical channel running time-frequency resource simultaneously.
Concrete, CTS message can be sent respectively to these at least two STA, the channel running time-frequency resource information that these at least two STA distribute separately is included as respectively in the CTS message now sent respectively to these at least two STA, and interleaved sequence information and/or frequency expansion sequence information.
When the upstream data after different interleaved sequences and/or frequency expansion sequence process that these at least two STA that AP receives shared same channel running time-frequency resource send, corresponding need to be utilized as the interleaved sequence and/or frequency expansion sequence that each STA specifies, to interweave respectively by iterative solution and/or the data handling procedure of separating spread spectrum obtains the upstream data that each STA sends.
Corresponding to the data transmission method of above-mentioned AP side, the embodiment of the present invention additionally provides a kind of data transmission method of STA side, as shown in Figure 5, is the principle flow chart of the method, specifically comprises the steps:
Step 51, STA sends RTS message to AP;
Optionally, can also comprise before step 51;
First, STA receives the Beacon message that AP sends, the transmitting time of this Beacon message instruction uplink synchronous Indication message;
If STA can receive the Beacon message that AP sends, illustrate that this STA is Awake state, then after the Beacon message receiving AP transmission, continue to keep Awake state, the uplink synchronous Indication message of AP transmission can be received.
Secondly, STA receives the uplink synchronous Indication message of AP transmission in the transmitting time of instruction, the identification information allowing the STA sending RTS message is comprised in this up Indication message, make the STA needing to send upstream data according to this identification information, can judge whether self can send RTS message to AP.
Then in this case, step 51 can specifically comprise:
STA, according to the uplink synchronous Indication message received, determines that self identification matches with allowing the identification information sending the STA of RTS message, and when having upstream data to be sent, sends RTS message to AP.
In addition, can also carry RTS message send opportunity information in Beacon message or uplink synchronous Indication message, then in this case, step 51 can specifically comprise:
The send opportunity that STA uses this RTS message send opportunity information to indicate sends RTS message to AP.
When the send opportunity of RTS message send opportunity information instruction can be, but not limited to comprise:
STA send RTS message can subchannel, and the service time of every sub-channels, when every sub-channels can comprise one or more subcarrier, the send opportunity that STA uses this RTS message send opportunity information to indicate sends RTS message to AP, can specifically comprise:
STA from this STA send RTS message can subchannel select a sub-channels, and send RTS message in the service time of the subchannel selected to AP.
Or when the send opportunity of RTS message send opportunity information instruction can be, but not limited to comprise:
When STA uses whole channel to send RTS message, during at least one time slot available, the send opportunity that STA uses this RTS message send opportunity information indicate, to AP transmission RTS message, can specifically comprise:
When STA sends RTS message from STA can at least one time slot, selects a time slot, to AP transmission RTS message.
Step 52, STA receives the CTS message of the RTS message feedback that AP sends according to it;
When AP is this STA and at least one other STA is assigned with identical channel running time-frequency resource, the channel running time-frequency resource information identical with at least one other STA that AP distributes is comprised in this CTS message, and the interleaved sequence information different from least one other STA and/or frequency expansion sequence information;
Step 53, STA utilizes the interleaved sequence of this interleaved sequence information and/or the instruction of frequency expansion sequence information and/or frequency expansion sequence to carry out interleaving treatment and/or spread processing to data to be sent, and the data after process are sent to AP by the channel running time-frequency resource distributed.
It should be noted that, STA involved in various embodiments of the present invention can be high efficiency Wireless Fidelity (HighEfficientWiFi, HEW) STA, or WiFiSTA of future generation (namely following the STA of WiFi standard of future generation).And involved beacon message can be beacon frame, uplink synchronous Indication message can be uplink synchronous instruction frame, and RTS message can be RTS frame, and CTS message can be CTS frame.
In the embodiment of the present invention, by distributing identical channel running time-frequency resource and different frequency expansion sequences and/or interleaved sequence at least two STA, make these at least two STA can transmit the upstream data after different interleaved sequences and/or frequency expansion sequence process on same channel running time-frequency resource.Because these at least two STA can share same channel running time-frequency resource, so the time started without the need to indicating each STA to use the channel distributed in CTS message, and STA can default Start Time be receive this CTS message after preset a time, therefore do not need to take more bit in CTS message, multiple STA can also be avoided to use the interference problem existed during same channel in a time division manner simultaneously.
According to above-mentioned principles and methods two embodiments that realize, the scheme that the embodiment of the present invention provides is described in detail.
Embodiment one
As shown in Figure 6, the data transmission method provided for the embodiment of the present invention one realize schematic diagram.
With reference to figure 6, its implementation procedure is as follows:
(1) AP periodically sends Beacon message, indicate the information sending the RAW of upstream data for STA, and the sart point in time at indicated RAW is sent uplink synchronous Indication message, make the STA needing to send upstream data can send the time point maintenance Awake state of uplink synchronous Indication message at AP, to receive the uplink synchronous Indication message of AP transmission.
Alternatively, AP can also be shown in Beacon message or uplink synchronous Indication message middle finger the send opportunity information that STA in this beacon period sends RTS message: the division information (such as every sub-channels comprises one or more subcarrier) comprising such as sub-channel, and the service time etc. of every sub-channels after dividing.
(2) STA that supplies that AP indicates in Beacon message sends the sart point in time of the RAW of upstream data, send a uplink synchronous Indication message (the CTS message of this uplink synchronous Indication message by defining in expansion existing standard, so that the STA meeting existing 802.11 standards can identify this message), and limit in this uplink synchronous Indication message subsequently can Stochastic choice RTS message send opportunity (alternatively, also can according to the STA order indicated in uplink synchronous Indication message, select the RTS message send opportunity of corresponding order), and the qualifications information of STA of RTS message is sent to AP, and comprise in uplink synchronous Indication message alternatively and can be used for STA sends send opportunity information from RTS message to AP subsequently, the division information (number of subcarriers that such as every sub-channels comprises) of such as sub-channel, and the service time etc. of corresponding every sub-channels, that is a send opportunity was determined by a period of time of one or more subcarrier and correspondence.
The send opportunity information of this RTS message also can be carried in Beacon message, then can omit this information in uplink synchronous Indication message.
It should be noted that, if AP does not have STA to send RTS message after have sent a uplink synchronous Indication message, then AP needs to change the qualifications limiting the STA sending RTS message in uplink synchronous Indication message, and again send uplink synchronous Indication message, have an opportunity to have sent RTS message until define data STA to be sent.The representation of concrete qualifications can be the AID comprising a reference, then specifies the quantity of AID thereafter, or specifies two to limit the STA between two AID with reference to AID, or the group identification information of one group of STA.
(3) STA of uplink synchronous Indication message is received, after the SIFS time receiving uplink synchronous Indication message, if STA judges oneself to send RTS message to AP according to uplink synchronous Indication message, Stochastic choice send opportunity in the send opportunity of the RTS message then indicated from uplink synchronous Indication message (or Beacon message), RTS message is sent to AP, and the channel resource information (time span of such as number of sub-channels and correspondence indicating oneself to need in RTS message, or data volume to be sent), and the value in " duration " territory in RTS message is calculated according to data volume to be sent, concrete indicating mode is as shown in Figure 7: " transmission address " territory occupying six bytes in the RTS message define existing standard, change into " the transmitting terminal association identification AID " territory taking two bytes, and take " bandwidth on demand information " territory of four bytes.STA carries the AID of oneself by " transmitting terminal association identification AID " territory, and to make AP identify the STA sending RTS message, STA carries the channel resource information of oneself request by " bandwidth on demand information " territory simultaneously.
It should be noted that, in this step because multiple STA is the send opportunity of Stochastic choice RTS message, so multiple STA may be had have selected same send opportunity to AP transmission RTS message, at this moment the RTS message collision that multiple STA sends will be caused, for the RTS message of conflict, AP does not carry out processing and responding.
In addition, for the time span value in " duration " territory in RTS frame, STA still can determine according to the length of the channel service time oneself using a sub-channels to send required for data to be sent, so that other STA receiving this RTS message utilizes this time span value to arrange the NAV time value of self, thus in this time span of specifying, other STA no longer removes competitive channel.
(4) for the STA that successful transmission of RTS message, the channel resource information that AP will ask according to STA, for STA allocation of channel resources, and be its response CTS message at the subchannel that the RTS message received is corresponding, and be designated as by CTS message the channel resource information that this STA distributes, be such as designated as service time for the one or more subchannel and correspondence that send upstream data that STA distributes (can the value of duration field in Effect-based operation calculate channel service time).
Be assigned with same channel running time-frequency resource (namely using identical subchannel to send upstream data at one time) if AP is two or more STA, then AP also needs to be included as in CTS message the interleaved sequence information and/or frequency expansion sequence information that STA specifies simultaneously.Concrete indicating mode is as shown in Figure 8: will occupy " receiver address " territory of six bytes in existing standard CTS message, change into " the receiving terminal association identification AID " territory taking two bytes, with " distribution bandwidth information " territory taking two bytes, and take " interleaved sequence information " territory (and/or " frequency expansion sequence information " territory) of two bytes.AP carries the association identification of target STA by " receiving terminal association identification AID " territory, so that STA can identify the CTS message that AP sends to oneself, simultaneously AP carries channel resource information into STA distribution by " distribution bandwidth information " territory, as by the one or more subchannels one or more binary digit being set to " 1 " be expressed as STA distribution, and STA uses subchannel to send after time started of upstream data is defaulted as after receiving CTS message a SIFS time, use the duration of channel then can be calculated by the value in " duration " territory in CTS message to determine.These 2 bytes can be adopted in " interleaved sequence information " territory (and/or " frequency expansion sequence information " territory) taking two bytes to represent that AP is the index information of the STA interleaved sequence of specifying or interleaved sequence, for the situation of instruction interleaved sequence index information, then need pre-defined spendable interleaved sequence set, and the interleaved sequence in set is numbered, STA can determine corresponding interleaved sequence by numbering, if AP needs to be STA specified interlace sequence information and frequency expansion sequence information simultaneously, the information of interleaved sequence and frequency expansion sequence then respectively can be indicated respectively by a byte.In addition, AP also can only for STA specifies frequency expansion sequence, is the frequency expansion sequence information that STA specifies with regard to only comprising AP in " frequency expansion sequence information " territory of at this moment 2 bytes.It should be noted that for have selected the situation of same send opportunity to AP transmission RTS message, due to the RTS message of AP None-identified conflict, being then considered as invalid message, CTS message will not being responded for invalid RTS message AP.
(5) STA receives the CTS message comprising oneself association identification that AP sends on the channel sending RTS message, resolve " distribution bandwidth information " territory and " interleaved sequence information " territory (and/or " frequency expansion sequence information " territory) that wherein comprise, determine that AP is the channel resource that oneself distributes, then multiple STA respectively AP be its distribute channel resource on transmitted in parallel upstream data, when two or more STA is assigned with same channel running time-frequency resource, these STA then need the interleaved sequence utilizing AP to specify in CTS message before data send to carry out interleaving treatment to data, and when AP receives the upstream data of STA transmission that these share same channel running time-frequency resource, need to be utilized as the interleaved sequence that each STA specifies accordingly, data handling procedure (and/or separating spreading procedure) respectively by iterative solution intertexture obtains the upstream data that each STA sends.
(6) after the upstream data successfully receiving STA transmission, at different subchannels, (such as corresponding STA sends the channel of RTS message to AP respectively, or STA send upstream data use one of them subchannel of subchannel) on, for successful transmission of the STA transmitted in parallel acknowledge message ACK of upstream data.
Embodiment two
As shown in Figure 9, the data transmission method provided for the embodiment of the present invention two realize schematic diagram.
With reference to figure 9, its implementation procedure is as follows:
(1) AP periodically sends Beacon message, indicate the information sending the RAW of upstream data for STA, and the sart point in time at indicated RAW is sent uplink synchronous Indication message, make the STA needing to send upstream data can send the time point maintenance Awake state of uplink synchronous Indication message at AP, to receive the uplink synchronous Indication message of AP transmission.
Alternatively, AP can also be shown in STA in this beacon period in Beacon message or uplink synchronous Indication message middle finger and send the send opportunity information of RTS message: the such as division information of time slot (Timeslot), can be divided into multiple time slot by the time period sent for STA in the RAW of upstream data, each time slot can be used for STA and sends a RTS message over the entire channel.
(2) STA that supplies that AP indicates in Beacon message sends the sart point in time of the RAW of upstream data, send a uplink synchronous Indication message (the CTS message of this uplink synchronous Indication message by defining in expansion existing standard, so that the STA meeting existing 802.11 standards can identify this message), and limit in this uplink synchronous Indication message and can send the transmitting time groove (timeslot) of RTS message (alternatively by Stochastic choice one subsequently, STA also can according to the STA order indicated in uplink synchronous Indication message, select the time slot of corresponding order), and the qualifications information of STA of RTS message is sent to AP, and comprise in uplink synchronous Indication message alternatively and can be used for STA sends division information from the time slot of RTS message to AP subsequently.
If STA sends division information from the time slot of RTS message to AP is carried in Beacon message, then can omit this information in uplink synchronous Indication message.
It should be noted that, if AP does not have STA to send RTS message after have sent a uplink synchronous Indication message, then AP needs to change the qualifications limiting the STA sending RTS message in uplink synchronous Indication message, and again send uplink synchronous Indication message, have an opportunity to have sent RTS message until define data STA to be sent.The representation of concrete qualifications can be the AID comprising a reference, then specifies the quantity of AID thereafter, or specifies two to limit the STA between two AID with reference to AID, or the group identification information of one group of STA.
(3) STA of uplink synchronous Indication message is received, after the SIFS time receiving uplink synchronous Indication message, judge oneself to send RTS message to AP according to uplink synchronous Indication message, random in the RTS message transmitting time groove then indicated from uplink synchronous Indication message (or Beacon message) (or order) selects a time slot, RTS message (concrete send mode can be that the mode copying RTS message content distinguishes on each of the sub-channels transmitted in parallel RTS message simultaneously) is sent to AP, and in RTS message, indicate oneself to need channel resource information (such as number of sub-channels and time span, or data volume to be sent), and the value in " duration " territory in RTS message is calculated according to data volume to be sent, concrete indicating mode can with reference to above-mentioned Fig. 7.
It should be noted that, in this step because multiple STA is Stochastic choice RTS message transmitting time groove, have selected groove at the same time and send RTS message so multiple STA may be had to AP, at this moment the RTS message collision that multiple STA sends will be caused, for the RTS message of conflict, AP does not carry out processing and responding.In addition, for the time span value in " duration " territory in RTS frame, STA still can determine according to the length of the channel service time oneself using a sub-channels to send required for data to be sent, so that other STA receiving this RTS frame utilizes this time span value to arrange the NAV time value of self, thus in this time span of specifying, other STA no longer removes competitive channel.
(4) for the STA that successful transmission of RTS message, the channel resource information that AP will ask according to STA, for STA allocation of channel resources, and on multiple subchannel, be respectively the STA that successful transmission of RTS message parallel transmission respectively CTS message simultaneously, the channel resource information being designated as this STA distribution in CTS message (also can send a CTS message in the mode of broadcast or multicast, be included as the channel resource information that multiple STA distributes wherein), such as be designated as service time for the one or more subchannel and correspondence that send upstream data that STA distributes (can the value of duration field in Effect-based operation calculate channel service time).
Be assigned with same channel running time-frequency resource (namely using identical subchannel to send upstream data at one time) if AP is two or more STA, then AP also needs to be included as in CTS message the interleaved sequence information and/or frequency expansion sequence information that STA specifies simultaneously.Concrete indicating mode as shown in Figure 8 above.
It should be noted that for have selected the situation of same send opportunity to AP transmission RTS message, due to the RTS message of AP None-identified conflict, being then considered as invalid message, CTS message will not being responded for invalid RTS message AP.
(5) STA receives the CTS message comprising oneself association identification that AP sends on the channel sending RTS, resolve " distribution bandwidth information " territory and " interleaved sequence information " territory (and/or " frequency expansion sequence information " territory) that wherein comprise, determine that AP is the channel resource that oneself distributes, then multiple STA respectively AP be its distribute channel resource on transmitted in parallel upstream data, when two or more STA is assigned with same channel running time-frequency resource, these STA then need data send before utilize AP to specify in CTS message interleaved sequence and/or frequency expansion sequence interleaving treatment and/or spread processing are carried out to data, and when AP receives the upstream data of STA transmission that these share same channel running time-frequency resource, need to be utilized as interleaved sequence and/or frequency expansion sequence that each STA specifies accordingly, interweave respectively by iterative solution or separate the data handling procedure of spread spectrum and obtain the upstream data that each STA sends.
(6) after the upstream data successfully receiving STA transmission, at different subchannels, (such as corresponding STA receives the channel of CTS message to AP respectively, or STA send upstream data use one of them subchannel of subchannel) on, for successful transmission of the STA transmitted in parallel ACK of upstream data.
Based on said method, the embodiment of the present invention additionally provides a kind of data transmission device, can be, but not limited to as AP, as described in Figure 10, is the structural representation of this device, comprises:
RTS message reception units 101, the request sent for receiving multiple site STA sends RTS message;
CTS message sending unit 102, for the RTS message that the described multiple STA received according to RTS message reception units 101 send, for at least two STA in described multiple STA distribute identical channel running time-frequency resource time, send to described at least two STA and confirm to send CTS message; Wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in described at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information are different, send the upstream data after different interleaved sequences and/or frequency expansion sequence process with at least two STA described in enabling on identical channel running time-frequency resource to described AP simultaneously.
Optionally, described CTS message sending unit 102, specifically for:
Send CTS message respectively to described at least two STA, wherein, in each CTS message, be included as the channel running time-frequency resource information that the STA that receives this CTS message distributes, and interleaved sequence information and/or frequency expansion sequence information.
Optionally, described device also comprises:
Beacon message transmitting element 103, for sending beacon message, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Uplink synchronous Indication message transmitting element 104, sends uplink synchronous Indication message for the transmitting time indicated at beacon message transmitting element 103, comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
Described RTS message reception units 101, specifically for:
Receive the RTS message that multiple STA sends; Wherein, described multiple STA needs to send upstream data and according to the uplink synchronous Indication message determination self identification received and the described STA allowing the identification information of the STA sending RTS message to match.
Optionally, described beacon message also comprises the information of limiting access window RAW, so as the STA receiving described beacon message in described RAW no longer with the mode access channel of competition;
Wherein, the sart point in time of described RAW is the transmitting time of described uplink synchronous Indication message.
Optionally, in described beacon message or described uplink synchronous Indication message, carry RTS message send opportunity information, so that the send opportunity that the STA being allowed to send RTS message can use described RTS message send opportunity information to indicate sends RTS message;
Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
Based on the above-mentioned device provided, as shown in figure 11, for the hardware structure diagram of this device that the embodiment of the present invention provides, comprise: processor 111 (can for one or more, the embodiment of the present invention is for one), memory 112, receiver 113, transmitter 114 and communication bus 115, wherein, processor 111, memory 112, receiver 113 are all connected with communication bus 115 with transmitter 114.
Processor 111 can be a general central processor (CPU), microprocessor, ASIC(Application Specific Integrated Circuit) (application-specificintegratedcircuit, ASIC), or one or more for controlling the integrated circuit that the present invention program's program performs.
Wherein, described communication bus 115 can comprise a path, between said modules, transmit information.
Described memory 112, is connected with described processor 111, and stores the program code of described processor 111 execution;
Described receiver 113, is connected with described processor 111 by described communication bus 115, for receiving the RTS message that multiple STA sends;
Described processor 111, be connected with described memory 112, for the RTS message that the described multiple STA received according to described receiver 113 send, be at least two STA allocated channel running time-frequency resources in described multiple STA and interleaved sequence information and/or frequency expansion sequence information;
Described transmitter 114, is connected with described processor 111 by described communication bus 115, for when described processor 111 be at least two STA in described multiple STA distribute identical channel running time-frequency resource time, send CTS message to described at least two STA; Wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in described at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information are different, send the upstream data after different interleaved sequences and/or frequency expansion sequence process with at least two STA described in enabling on identical channel running time-frequency resource to described AP simultaneously.
Optionally, described transmitter 114, specifically for:
Send CTS message respectively to described at least two STA, wherein, in each CTS message, be included as the channel running time-frequency resource information that the STA that receives this CTS message distributes, and interleaved sequence information and/or frequency expansion sequence information.
Optionally, described receiver 113, also for:
Send beacon message, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Send uplink synchronous Indication message in described transmitting time, in described uplink synchronous Indication message, comprise the identification information allowing the STA sending RTS message;
In this case, described receiver 113, specifically for:
Receive the RTS message that multiple STA sends; Wherein, described multiple STA needs to send upstream data and according to the uplink synchronous Indication message determination self identification received and the described STA allowing the identification information of the STA sending RTS message to match.
Optionally, described beacon message also comprises the information of limiting access window RAW, so as the STA receiving described beacon message in described RAW no longer with the mode access channel of competition;
Wherein, the sart point in time of described RAW is the transmitting time of described uplink synchronous Indication message.
Optionally, in described beacon message or described uplink synchronous Indication message, carry RTS message send opportunity information, so that the send opportunity that the STA being allowed to send RTS message can use described RTS message send opportunity information to indicate sends RTS message;
Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
Based on said method, the embodiment of the present invention additionally provides a kind of data transmission device, can be, but not limited to as STA, as described in Figure 12, is the structural representation of this device, comprises:
RTS message sending unit 121, sends RTS message for sending request to access point AP;
CTS message reception units 122, for receiving the CTS message of described AP according to described RTS message feedback; Wherein, when described AP is the transmit leg of described RTS message and the transmit leg of at least one other RTS message is assigned with identical channel running time-frequency resource, the channel running time-frequency resource information identical with the transmit leg of at least one other RTS message described that described AP distributes is comprised in described CTS message, and the interleaved sequence information different from the transmit leg of at least one other RTS message described and/or frequency expansion sequence information;
Data transmission unit 123, interleaved sequence and/or the frequency expansion sequence of the described interleaved sequence information comprised for utilizing CTS message reception units 122 and/or the instruction of frequency expansion sequence information carry out interleaving treatment and/or spread processing to data to be sent, and the data after process are sent to described AP by described channel running time-frequency resource.
Optionally, described device also comprises:
Beacon message receiving element 124, for receiving the beacon message that described AP sends, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Uplink synchronous Indication message receiving element 125, the transmitting time for indicating at beacon message receiving element 124 receives the uplink synchronous Indication message that described AP sends, and comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
Described RTS message sending unit 121, specifically for:
According to described uplink synchronous Indication message, determine that self identification and the described identification information of the STA sending RTS message that allows match, and when having upstream data to be sent, send RTS message to AP.
Optionally, RTS message send opportunity information is carried in described beacon message or described uplink synchronous Indication message;
Described RTS message sending unit 121, specifically for:
The send opportunity using described RTS message send opportunity information to indicate sends RTS message to described AP.
Optionally, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
Based on the above-mentioned device provided, as shown in figure 13, for the hardware structure diagram of this device that the embodiment of the present invention provides, comprise: processor 131 (can for one or more, the embodiment of the present invention is for one), memory 132, receiver 133, transmitter 134 and communication bus 135, wherein, processor 131, memory 132, receiver 133, transmitter 134 are all connected with communication bus 135.
Processor 131 can be a general central processor (CPU), microprocessor, ASIC(Application Specific Integrated Circuit) (application-specificintegratedcircuit, ASIC), or one or more for controlling the integrated circuit that the present invention program's program performs.
Wherein, described communication bus 135 can comprise a path, between said modules, transmit information.
Described memory 132, is connected with described processor 131, and stores the program code of described processor 131 execution;
Described transmitter 134, is connected with described processor 131 by described communication bus 135, for sending RTS message to access point AP; And the channel running time-frequency resource that the data after being processed by processor 131 are distributed by AP sends to described AP;
Described receiver 133, is connected with described processor 131 by described communication bus 135, for receiving the CTS message of described AP according to described RTS message feedback; The channel running time-frequency resource information identical with the transmit leg of at least one other RTS message described that described AP distributes is comprised in described CTS message, and the interleaved sequence information different from the transmit leg of at least one other RTS message described and/or frequency expansion sequence information;
Described processor 131, be connected with described memory 132, interleaved sequence and/or frequency expansion sequence for utilizing described interleaved sequence information and/or the instruction of frequency expansion sequence information carry out interleaving treatment and/or spread processing to data to be sent, and channel running time-frequency resource described in the data separate after process is sent to described AP by described transmitter 134.
Optionally, described receiver 133, also for before sending RTS message at transmitter 134 to AP, receives the beacon message that described AP sends, the transmitting time of described beacon message instruction uplink synchronous Indication message; Receive the uplink synchronous Indication message of described AP transmission in described transmitting time, in described uplink synchronous Indication message, comprise the identification information allowing the STA sending RTS message; Then
Described transmitter 134, specifically for:
According to described uplink synchronous Indication message, determine that self identification and the described identification information of the STA sending RTS message that allows match, and when having upstream data to be sent, send RTS message to AP.
Optionally, RTS message send opportunity information is carried in described beacon message or described uplink synchronous Indication message;
Described transmitter 134, specifically for:
The send opportunity using described RTS message send opportunity information to indicate sends RTS message to described AP.
Optionally, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier, or,
When STA uses whole channel to send RTS message, at least one available time slot.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (16)

1. a data transmission method, is characterized in that, comprising:
Access point AP receives the request transmission RTS message that multiple site STA sends;
The RTS message that described AP sends according to described multiple STA, at least two STA in described multiple STA distribute identical channel running time-frequency resource time, send to described at least two STA and confirm to send CTS message; Wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in described at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information are different, send the upstream data after different interleaved sequences and/or frequency expansion sequence process with at least two STA described in enabling on identical channel running time-frequency resource to described AP simultaneously.
2. the method for claim 1, it is characterized in that, CTS message is sent to described at least two STA, wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, specifically comprise:
Send CTS message respectively to described at least two STA, wherein, in each CTS message, be included as the channel running time-frequency resource information that the STA that receives this CTS message distributes, and interleaved sequence information and/or frequency expansion sequence information.
3. method as claimed in claim 1 or 2, is characterized in that, before AP receives the RTS message of multiple STA transmission, described method also comprises:
AP sends beacon message, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Described AP sends uplink synchronous Indication message in described transmitting time, comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
AP receives the RTS message that multiple STA sends, and specifically comprises:
AP receives the RTS message that multiple STA sends; Wherein, described multiple STA needs to send upstream data and according to the uplink synchronous Indication message determination self identification received and the described STA allowing the identification information of the STA sending RTS message to match.
4. method as claimed in claim 3, it is characterized in that, described beacon message also comprises the information of limiting access window RAW so that the STA receiving described beacon message in described RAW no longer with the mode access channel of competition;
Wherein, the sart point in time of described RAW is the transmitting time of described uplink synchronous Indication message.
5. the method as described in claim 3 or 4, it is characterized in that, RTS message send opportunity information is carried, so that the send opportunity that the STA being allowed to send RTS message can use described RTS message send opportunity information to indicate sends RTS message in described beacon message or described uplink synchronous Indication message; Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
6. a data transmission method, is characterized in that, comprising:
Send request to access point AP and send RTS message;
Receive the CTS message of described AP according to described RTS message feedback; Wherein, when described AP is the transmit leg of described RTS message and the transmit leg of at least one other RTS message is assigned with identical channel running time-frequency resource, the channel running time-frequency resource information identical with the transmit leg of at least one other RTS message described that described AP distributes is comprised in described CTS message, and the interleaved sequence information different from the transmit leg of at least one other RTS message described and/or frequency expansion sequence information;
Utilize the interleaved sequence of described interleaved sequence information and/or the instruction of frequency expansion sequence information and/or frequency expansion sequence to carry out interleaving treatment and/or spread processing to data to be sent, and the data after process are sent to described AP by described channel running time-frequency resource.
7. method as claimed in claim 6, is characterized in that, before sending RTS message to AP, described method also comprises:
Receive the beacon message that described AP sends, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Receive the uplink synchronous Indication message of described AP transmission in described transmitting time, in described uplink synchronous Indication message, comprise the identification information allowing the STA sending RTS message; Then
Send RTS message to AP, specifically comprise:
According to described uplink synchronous Indication message, determine that self identification and the described identification information of the STA sending RTS message that allows match, and when having upstream data to be sent, send RTS message to AP.
8. method as claimed in claim 7, is characterized in that, carry RTS message send opportunity information in described beacon message or described uplink synchronous Indication message;
Send RTS message to access point AP, specifically comprise:
The send opportunity using described RTS message send opportunity information to indicate sends RTS message to described AP;
Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
9. a data transmission device, is characterized in that, comprising:
RTS message reception units, the request sent for receiving multiple site STA sends RTS message;
CTS message sending unit, for the RTS message that the described multiple STA received according to RTS message reception units send, for at least two STA in described multiple STA distribute identical channel running time-frequency resource time, send to described at least two STA and confirm to send CTS message; Wherein, the channel running time-frequency resource information that described in being included as in the CTS message that described at least two STA send, at least two STA distribute, and interleaved sequence information and/or frequency expansion sequence information, and be that the channel running time-frequency resource information that each STA in described at least two STA distributes is identical, interleaved sequence information and/or frequency expansion sequence information are different, send the upstream data after different interleaved sequences and/or frequency expansion sequence process with at least two STA described in enabling on identical channel running time-frequency resource to described AP simultaneously.
10. device as claimed in claim 9, is characterized in that, described CTS message sending unit, specifically for:
Send CTS message respectively to described at least two STA, wherein, in each CTS message, be included as the channel running time-frequency resource information that the STA that receives this CTS message distributes, and interleaved sequence information and/or frequency expansion sequence information.
11. devices as described in claim 9 or 10, it is characterized in that, described device also comprises:
Beacon message transmitting element, for sending beacon message, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Uplink synchronous Indication message transmitting element, sends uplink synchronous Indication message for the transmitting time indicated at beacon message transmitting element, comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
Described RTS message reception units, specifically for:
Receive the RTS message that multiple STA sends; Wherein, described multiple STA needs to send upstream data and according to the uplink synchronous Indication message determination self identification received and the described STA allowing the identification information of the STA sending RTS message to match.
12. devices as claimed in claim 11, it is characterized in that, described beacon message also comprises the information of limiting access window RAW so that the STA receiving described beacon message in described RAW no longer with the mode access channel of competition;
Wherein, the sart point in time of described RAW is the transmitting time of described uplink synchronous Indication message.
13. methods as described in claim 11 or 12, it is characterized in that, RTS message send opportunity information is carried, so that the send opportunity that the STA being allowed to send RTS message can use described RTS message send opportunity information to indicate sends RTS message in described beacon message or described uplink synchronous Indication message; Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
14. 1 kinds of data transmission devices, is characterized in that, comprising:
RTS message sending unit, sends RTS message for sending request to access point AP;
CTS message reception units, for receiving the CTS message of described AP according to described RTS message feedback; Wherein, when described AP is the transmit leg of described RTS message and the transmit leg of at least one other RTS message is assigned with identical channel running time-frequency resource, the channel running time-frequency resource information identical with the transmit leg of at least one other RTS message described that described AP distributes is comprised in described CTS message, and the interleaved sequence information different from the transmit leg of at least one other RTS message described and/or frequency expansion sequence information;
Data transmission unit, interleaved sequence and/or the frequency expansion sequence of the described interleaved sequence information comprised for utilizing CTS message reception units and/or the instruction of frequency expansion sequence information carry out interleaving treatment and/or spread processing to data to be sent, and the data after process are sent to described AP by described channel running time-frequency resource.
15. devices as claimed in claim 14, it is characterized in that, described device also comprises:
Beacon message receiving element, before sending request transmission RTS message in described RTS message sending unit to access point AP, receives the beacon message that described AP sends, the transmitting time of described beacon message instruction uplink synchronous Indication message;
Uplink synchronous Indication message receiving element, the transmitting time for indicating at described beacon message receives the uplink synchronous Indication message that described AP sends, and comprises the identification information allowing the STA sending RTS message in described uplink synchronous Indication message;
Described RTS message sending unit, specifically for:
According to described uplink synchronous Indication message, determine that self identification and the described identification information of the STA sending RTS message that allows match, and when having upstream data to be sent, send RTS message to AP.
16. devices as claimed in claim 15, is characterized in that, carry RTS message send opportunity information in described beacon message or described uplink synchronous Indication message;
Described RTS message sending unit, specifically for:
The send opportunity using described RTS message send opportunity information to indicate sends RTS message to described AP;
Wherein, the send opportunity of described RTS message send opportunity information instruction comprises:
STA send RTS message can subchannel, and service time of every sub-channels, described every sub-channels comprises one or more subcarrier; Or,
When STA uses whole channel to send RTS message, at least one available time slot.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107087304A (en) * 2016-02-15 2017-08-22 华为技术有限公司 A kind of communication means, access point and website
WO2017193396A1 (en) * 2016-05-13 2017-11-16 华为技术有限公司 Information processing method, terminal, and base station
WO2018035801A1 (en) * 2016-08-25 2018-03-01 华为技术有限公司 Message transmission method, related device, and system
WO2018098675A1 (en) * 2016-11-30 2018-06-07 富士通株式会社 Device and method for data retransmission and communication system
WO2019007262A1 (en) * 2017-07-06 2019-01-10 索尼公司 Wireless communication method and wireless communication device
CN113747503A (en) * 2021-08-05 2021-12-03 维沃移动通信有限公司 Data transmission method and device and sending end equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050213554A1 (en) * 2004-03-29 2005-09-29 Boris Ginzburg Method, apparatus and system of packet transmission
CN1744747A (en) * 2005-09-28 2006-03-08 清华大学 Method for restrainting down in-phase channel interference of adjacent community for wireless cellular network
US20100097999A1 (en) * 2004-04-28 2010-04-22 Trainin Solomon B Method and apparatus to enable multiple receivers
CN101741797A (en) * 2008-11-25 2010-06-16 华为技术有限公司 Method and device for transmitting multi-antenna broadcast
CN102437902A (en) * 2010-09-29 2012-05-02 华为技术有限公司 Method and device for transmitting and receiving response message and scheduling request indication (SRI) message
CN102883460A (en) * 2011-07-15 2013-01-16 中兴通讯股份有限公司 Service data transmitting method and system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020167963A1 (en) * 2001-03-27 2002-11-14 Mario Joa-Ng Method and apparatus for spread spectrum medium access protocol with collision avoidance using controlled time of arrival
CN102316518A (en) * 2010-07-08 2012-01-11 北京邮电大学 Improved request-to-send (RTS)/clear-to-send (CTS) communication control method
WO2012021131A1 (en) * 2010-08-11 2012-02-16 Thomson Licensing Common control channel design and coexistence mechanism for tv white space

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050213554A1 (en) * 2004-03-29 2005-09-29 Boris Ginzburg Method, apparatus and system of packet transmission
US20100097999A1 (en) * 2004-04-28 2010-04-22 Trainin Solomon B Method and apparatus to enable multiple receivers
CN1744747A (en) * 2005-09-28 2006-03-08 清华大学 Method for restrainting down in-phase channel interference of adjacent community for wireless cellular network
CN101741797A (en) * 2008-11-25 2010-06-16 华为技术有限公司 Method and device for transmitting multi-antenna broadcast
CN102437902A (en) * 2010-09-29 2012-05-02 华为技术有限公司 Method and device for transmitting and receiving response message and scheduling request indication (SRI) message
CN102883460A (en) * 2011-07-15 2013-01-16 中兴通讯股份有限公司 Service data transmitting method and system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11116003B2 (en) 2016-02-15 2021-09-07 Huawei Technologies Co., Ltd. Communication method, access point, and station for improving bandwidth utilization
WO2017140177A1 (en) * 2016-02-15 2017-08-24 华为技术有限公司 Communication method, access point, and site
US11683832B2 (en) 2016-02-15 2023-06-20 Huawei Technologies Co., Ltd. Communication method, access point, and station for bandwidth utilization
CN107087304A (en) * 2016-02-15 2017-08-22 华为技术有限公司 A kind of communication means, access point and website
WO2017193396A1 (en) * 2016-05-13 2017-11-16 华为技术有限公司 Information processing method, terminal, and base station
WO2018035801A1 (en) * 2016-08-25 2018-03-01 华为技术有限公司 Message transmission method, related device, and system
US10743295B2 (en) 2016-08-25 2020-08-11 Huawei Technologies Co., Ltd. Message sending method, related device, and system
WO2018098675A1 (en) * 2016-11-30 2018-06-07 富士通株式会社 Device and method for data retransmission and communication system
CN110521240A (en) * 2017-07-06 2019-11-29 索尼公司 Wireless communications method and wireless telecom equipment
CN110521240B (en) * 2017-07-06 2021-10-08 索尼公司 Wireless communication method and wireless communication device
US11277818B2 (en) 2017-07-06 2022-03-15 Sony Corporation Wireless communication method and wireless communication device
WO2019007262A1 (en) * 2017-07-06 2019-01-10 索尼公司 Wireless communication method and wireless communication device
CN113747503A (en) * 2021-08-05 2021-12-03 维沃移动通信有限公司 Data transmission method and device and sending end equipment

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