CN103108383B - Control method and the wireless site equipment of power - Google Patents
Control method and the wireless site equipment of power Download PDFInfo
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- CN103108383B CN103108383B CN201110246509.0A CN201110246509A CN103108383B CN 103108383 B CN103108383 B CN 103108383B CN 201110246509 A CN201110246509 A CN 201110246509A CN 103108383 B CN103108383 B CN 103108383B
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- txop
- allowed
- address information
- receiving terminal
- indicating bit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention relates to wireless communication field, a kind of method controlling power is provided, comprise: send empty packet statement NDPA to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, and described address information comprises transmitting terminal address and receiving terminal address, and described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state.By the Sounding at NDPA? the instruction of TXOP_PS_NOT_ALLOWED is carried in Sequence field, this instruction is provided for intended recipient end and judges whether to allow ingoing power to save state, to realize the method that in the TXOP based on NDPA, terminal power is saved.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of method and wireless site equipment controlling power
Background technology
In a wireless communication system, due to the application of MIMO (Multiple-InputMultiple-Out-put, multiple-input and multiple-output) technology and beamforming (beam forming) technology, channel information becomes more and more important.Beam-shaper (beamformer) obtains channel information by the feedback of received beam receiver (beamformee), and as the reference of follow-up transmission data.Beam-shaper all obtained TXOP (Transmitopportunity, transmission opportunity) in the mode of competition before every data transfer, then in the time span that this TXOP is corresponding, transmitted data.
In prior art, the process of beam-shaper obtaining information information is as follows: beam-shaper (transmitting terminal) sends NDPA (NullDataPacketAnnouncement to beam receiver (receiving terminal), empty packet statement) and NDP (NullDataPacket, empty packet) request channels information, after beam receiver receives NDPA and NDP, channel between beam-shaper and beam receiver is estimated, and according to rule, channel information is issued beam-shaper.When beam-shaper obtains multiuser channel information, for other beam receiver except first, frame can be indicated to notify that other beam receiver feeds back its channel information by sending SoundingPoll.
Transmission opportunity (Transmitopportunity, TXOP) has a kind of distinctive electricity-saving mechanism: TXOPPowerSave (PS) electricity-saving mechanism.In TXOPPS electricity-saving mechanism, allow to support that the website (Station, STA) of this mechanism enters sleep state when meeting specified conditions within the TXOP time, thus reach the object of power saving.
Access point (Accesspoint, AP) can indicate whether that the STA allowing to be in TXOPPS pattern enters sleep state by TXOP_PS_NOT_ALLOWED (the not allowing TXOPPS) field arranged in VHT-SIG-A1 (VeryHighThroughoutSignal-A1, very high-throughput information A1).If NDPA adopts conventional form to send, then this frame is difficult to be supplied to the information whether STA allows TXOP power to save.Therefore be difficult at present realize then based on terminal power method for saving in the TXOP of NDPA.
Summary of the invention
Embodiments provide a kind of method of saving based on terminal power in the TXOP of NDPA.
The embodiment of the present invention discloses a kind of method controlling power and comprises:
Empty packet statement NDPA is sent to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, described address information comprises the STA address in receiving terminal address and STA information, and described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state.
A kind of method controlling power of the embodiment of the present invention, comprising:
The empty packet statement NDPA that receiving end/sending end sends, described NDPA comprises address information, detection sequence, and wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, and described address information comprises the STA address in receiving terminal address and STA information;
Judge whether to allow ingoing power to save state according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information.
A kind of wireless site equipment is also provided simultaneously, comprises:
Transmitting element, for sending empty packet statement NDPA to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, described address information comprises the STA address in receiving terminal address and site STA information, and described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state.
Embodiments of the invention by carrying the instruction of TXOP_PS_NOT_ALLOWED in the SoundingSequence field of NDPA, this instruction is provided for intended recipient end and judges whether to allow ingoing power to save state, to realize the method that in the TXOP based on NDPA, terminal power is saved.
Accompanying drawing explanation
Fig. 1 is the ChannelSounding flow chart of single user.
Fig. 2 is the frame format schematic diagram of embodiment of the present invention NDPA.
Fig. 3 is the SoundingSequence field of NDPA in the embodiment of the present invention.
Fig. 4 is a kind of method controlling power of the embodiment of the present invention.
Fig. 5 is the wireless site device structure schematic diagram of the embodiment of the present invention.
Embodiment
The embodiment of the present invention relates to beam forming technique, can be applied in wireless local area network (WLAN) system, and the wireless device of use can be STA (Station, website).This STA includes but not limited to: mobile phone terminal, notebook computer, AP (AccessPoint, access point) etc.Wherein, when STA uses beam forming technique to send data, this STA can be called beam-shaper beamformer, and when STA uses beam forming technique to receive data, this STA can be called beam receiver beamformee.
The embodiment of the present invention can be applied to and obtain channel any one wireless communication system usufructuary based on competitive way, obtains the usufructuary equipment of channel, can preferentially use channel to carry out transfer of data for first competition.Wherein, compete the channel right to use obtained and can be called send opportunity TXOP, any instant in TXOP time span, equipment can send data, if TXOP terminates, then equipment can not re-use channel, again can only obtain the channel right to use by competition.
As shown in Figure 1, in the embodiment of the present invention, when beam-shaper obtains channel information, can ask by sending NDPA and NDP to beam receiver, after beam receiver receives NDPA and NDP, channel between beam-shaper and beam receiver is estimated, then the channel information obtained (ChannelInformation) is sent to beam-shaper, the flow process that this flow process can be called in channel detection (ChannelSounding) Fig. 1 is the ChannelSounding flow process of single user, refer to the transmission carrying out channel information between a beam-shaper and a beam receiver.The channel information acquisition that the embodiment of the present invention relates to also can be the ChannelSounding flow process of multi-user, refers to that a beam-shaper obtains channel information to multiple beam receiver.
See Fig. 2, the frame format of a kind of NDPA, a NDPA frame comprises:
FrameControl: frame controls, for identifying the type of this frame
Duration: duration, for describing this frame length in time
RA (receiveraddress): receiving terminal address
TA (transmitteraddress): transmitting terminal address
SoundingSequence: detection sequence
STAInfo:STA information, comprises STA address, STA feedback kind and channel matrix columns.
FCS (FrameCheckSequence): frame check sequence
The embodiment of the present invention increases TXOP_PS_NOT_ALLOWED indication information in above-mentioned NDPA, and realizes based on terminal power method for saving in the TXOP of NDPA at the receiving course of the beam receiver (receiving terminal) of correspondence.
Consulting Fig. 3, in the SoundingSequence field of NDPA, carry TXOP_PS_NOT_ALLOWED indicating bit, can be second bit in SoundingSequence field.SoundingSequence comprises the reserved place of 1 bit, the channel detection sequence number of the TXOP_PS_NOT_ALLOWED indicating bit of 1 bit and 6 bit.
Receiving terminal is after receiving NDPA, read the TXOPPSNotAllowed in SoundingSequence in order, by it stored in the corresponding parameter TXOP_PS_NOT_ALLOWED (usual step be read TXOP_PS_NOT_ALLOWED in the VHT-SIG-A of certain frame and by it stored in the corresponding parameter TXOP_PS_NOT_ALLOWED in RXVECTOR) in RXVECTOR (the physical layer parameter list that receiving terminal is formed after being arranged after receiving physical layer information and storing).
Receiving terminal, according to the situation of this parameter, can know that current whether permission enters TXOP power saving state; Such as, when TXOP_PS_NOT_ALLOWED is the first value, such as 0, represent that the STA ingoing power under permission TXOPPS pattern saves state, otherwise do not allow ingoing power to save state.And judge according to the STA address in RA or the STA list of NDPA further, if the address of this receiving terminal is the destination address of NDPA, then can not selects to enter TXOP power and save state; If the address of this receiving terminal is not the destination address of NDPA, then can selects to enter TXOP power and save state.Power save state is sleep state.Also the first value can be set to value in practice is that 1 expression allows the STA ingoing power under TXOPPS pattern to save state, and the concrete value of the first value here can be arranged in systems in which.
Consult Fig. 4, a kind of method controlling power of the embodiment of the present invention, particularly a kind of method of saving based on terminal power in the TXOP of NDPA.
S101, send NDPA to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, and described address information comprises address information and comprises STA address in receiving terminal address and STA information.
S102, receiving terminal receives this NDPA, and this receiving terminal judges whether to allow ingoing power to save state according to described TXOP_PS_NOT_ALLOWED indicating bit and address information.
Receiving terminal, according to this TXOP_PS_NOT_ALLOWED indicating bit, can know that current whether permission enters TXOP power saving state; Such as TXOP_PS_NOT_ALLOWED first is worth, and when being such as 0, representing that the STA under permission TXOPPS pattern enters sleep state, otherwise does not allow to enter sleep state.According to the address information of NDPA, receiving terminal judges that oneself (this receiving terminal) is the destination address of NDPA further, if oneself be the destination address of NDPA, namely in the STA address in receiving terminal address or STA information, then can not select to enter TXOP sleep state; If oneself be not the destination address of NDPA, in the STA address namely not in receiving terminal address or STA information, then can select to enter TXOP sleep state.
In above-mentioned step, two steps are transmitting terminal and receiver section independently step separately respectively, are transmitting terminal and receiving terminal party of one's own independent flow respectively.
Embodiments of the invention by carrying the instruction of TXOP_PS_NOT_ALLOWED in the SoundingSequence field of NDPA, this instruction is provided for intended recipient end and judges whether to allow ingoing power to save state, to realize the method that in the TXOP based on NDPA, terminal power is saved.
Further, another embodiment of the present invention can also with the control carrying out TXOP power saving state with the NDP of VHT transmission form after NDPA.
Transmitting terminal sends NDP again after SIFS (shortinterframespace, short frame period) after transmission NDPA, and NDP then adopts VHT to send form.Therefore, the bit TXOP_PS_NOT_ALLOWED in the VHT-SIG-A of NDP can be utilized to indicate whether, and allowing to enter TXOP power saves state.
Receiving terminal, after receiving NDPA, reads the address information in RA or the STA list of NDPA, judges that whether this receiving terminal (oneself) is the target of NDPA.If not the target of NDPA, then continue to receive NDP, and the TXOP_PS_NOT_ALLOWED read in the VHT-SIG-A of NDP is to judge whether that allowing to enter TXOP power saves.If allow to enter TXOP power to save, then can select to enter TXOP power and save state.If the target of NDPA, then it can not enter TXOP power and save state no longer to need the TXOP_PS_NOT_ALLOWED read further in the VHT-SIG-A of NDP to determine.
Another kind of realization flow can be: receiving terminal obtains the STA address in RA or the STA list of NDPA after receiving NDPA, and receives NDP further.Receiving terminal, after receiving NDP, first reads TXOP_PS_NOT_ALLOWED in the VHT-SIG-A of NDP to judge whether that allowing to enter TXOP power saves, and the NDPA that reading has stored further judges it oneself is whether the target of NDPA.If allow to enter TXOP power to save and oneself be not NDPA target STA, then ingoing power can be selected to save state, otherwise state can not be saved by ingoing power.
The power that above-mentioned method equally also can realize terminal in the TXOP based on NDPA is saved.
The embodiment of the present invention gives a kind of wireless site equipment realizing said method.Can be the site STA in wireless local area or access point AP in the application.AP is to each transmission data, and can think that AP is transmitting terminal, STA is receiving terminal.All can realizing in wireless site equipment of said method embodiment, concrete method details all can realize in the corresponding module of wireless site equipment or unit.
Following embodiment can complete each flow process and the step of said method.
Consult Fig. 5, the wireless LAN station equipment of the embodiment of the present invention, site apparatus 50 comprises:
Transmitting element 501, for sending empty packet statement NDPA to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, described address information comprises the STA address in receiving terminal address and site STA information, and described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state.
When site apparatus is only as sending ending equipment, can above-mentioned transmitting element 501 be passed through, complete function and the flow process of transmitting terminal.
Further, site apparatus 50 also comprises,
Receiving element 503, for the empty packet statement NDPA that receiving end/sending end sends, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, and described address information comprises transmitting terminal address and receiving terminal address;
State processing unit 505, allows ingoing power to save state for judging whether according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information.
Wherein TXOP_PS_NOT_ALLOWED indicating bit is arranged in second bit of described detection sequence field.
TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state, or state processing unit 505, when processing, if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described wireless site equipment is not in described address information, then described state processing unit does not allow described wireless site equipment ingoing power to save state, if or described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described wireless site equipment is not in described address information, then described state processing unit allows wireless site equipment ingoing power to save state.
Finally it should be noted that, one of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (ROM) or random store-memory body (RAM) etc.
Each functional unit in the embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.The above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.Above-mentioned each device or system, can perform the method in correlation method embodiment.
Claims (9)
1. control a method for power, it is characterized in that, described method comprises:
Empty packet statement NDPA is sent to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, described address information comprises the STA address in receiving terminal address and site STA information, and described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state;
Wherein, described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power state of saving to comprise: if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described receiving terminal is in described address information, then described receiving terminal ingoing power is not allowed to save state;
Or,
Described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power state of saving to comprise: if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described receiving terminal is not in described address information, then described receiving terminal ingoing power is allowed to save state.
2. method according to claim 1, is characterized in that, described TXOP_PS_NOT_ALLOWED indicating bit is arranged in second bit of described detection sequence field.
3. control a method for power, it is characterized in that, described method comprises:
The empty packet statement NDPA that receiving end/sending end sends, described NDPA comprises address information, detection sequence, and wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, and described address information comprises transmitting terminal address and receiving terminal address;
Judge whether to allow ingoing power to save state according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information;
Wherein, judge whether to allow ingoing power state of saving to comprise according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information: if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described receiving terminal is in described address information, then described receiving terminal is not allowed to enter power save state;
Or, judge whether to allow ingoing power state of saving to comprise according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information: if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described receiving terminal is not in described address information, then described receiving terminal is allowed to enter power save state.
4. method according to claim 3, is characterized in that, described TXOP_PS_NOT_ALLOWED indicating bit is arranged in second bit of described detection sequence field.
5. a wireless site equipment, is characterized in that, described equipment comprises:
Transmitting element, for sending empty packet statement NDPA to receiving terminal, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, described address information comprises the STA address in receiving terminal address and site STA information, and described TXOP_PS_NOT_ALLOWED indicating bit and described address information are used for described receiving terminal and judge whether to allow ingoing power to save state;
Wherein, if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described receiving terminal is in described address information, then described receiving terminal is not allowed to enter power save state; If or described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described receiving terminal is not in described address information, then described receiving terminal is allowed to enter power save state.
6. equipment according to claim 5, is characterized in that, described equipment also comprises:
Receiving element, for the empty packet statement NDPA that receiving end/sending end sends, described NDPA comprises address information, detection sequence, wherein said detection sequence comprises TXOP_PS_NOT_ALLOWED indicating bit, and described address information comprises transmitting terminal address and receiving terminal address;
State processing unit, allows ingoing power to save state for judging whether according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information.
7. equipment according to claim 5, is characterized in that, the TXOP_PS_NOT_ALLOWED indicating bit in the NDPA that described transmitting element sends or the NDPA that described receiving element receives is arranged in second bit of described detection sequence field.
8. equipment according to claim 6, is characterized in that, described state processing unit is used for judging whether to comprise when allowing ingoing power to save state according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information:
If described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described wireless site equipment is not in described address information, then described state processing unit does not allow described wireless site equipment ingoing power to save state.
9. equipment according to claim 6, it is characterized in that, described state processing unit is used for judging whether to comprise when allowing ingoing power to save state according to described TXOP_PS_NOT_ALLOWED indicating bit and described address information: if described TXOP_PS_NOT_ALLOWED indicating bit is the first value, and the address of described wireless site equipment is not in described address information, then described state processing unit allows wireless site equipment ingoing power to save state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110246509.0A CN103108383B (en) | 2011-08-25 | 2011-08-25 | Control method and the wireless site equipment of power |
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| CN201110246509.0A CN103108383B (en) | 2011-08-25 | 2011-08-25 | Control method and the wireless site equipment of power |
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| CN103108383A CN103108383A (en) | 2013-05-15 |
| CN103108383B true CN103108383B (en) | 2015-12-02 |
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Non-Patent Citations (1)
| Title |
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| IEEE P802.11 Wireless LANs;Chin-Hung（jackson）Chen;《IEEE 802.11-10/1361r1》;20101130;第38－39页 * |
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