CN103458433A - Method and device for channel measurement - Google Patents
Method and device for channel measurement Download PDFInfo
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- CN103458433A CN103458433A CN2012101711603A CN201210171160A CN103458433A CN 103458433 A CN103458433 A CN 103458433A CN 2012101711603 A CN2012101711603 A CN 2012101711603A CN 201210171160 A CN201210171160 A CN 201210171160A CN 103458433 A CN103458433 A CN 103458433A
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Abstract
The invention discloses a method and a device for channel measurement. The method includes that a channel measurement requester sends out a wireless frame, channel measurement requester identity information, channel measurement feedback party identity information and channel measurement feedback indication information are carried in a signaling domain of a physical frame head of the wireless frame, and the channel measurement feedback party is instructed to perform the channel measurement according to the channel measurement feedback indication information. By the method, completion of channel measurement notice and channel measurement functions can be ensured, sending amount of the wireless frame can be reduced, transmission efficiency can be improved, load expenses of transmission can be effectively lowered, power consumption can be lowered, and energy-saving demand can be met to a certain degree.
Description
Technical field
The present invention relates to computer network and wireless communication technology field, relate in particular to a kind of method and device of channel measurement.
Background technology
Current, in field of wireless, WLAN (wireless local area network) (WLAN) fast development, it is growing that the whole world covers demand to WLAN.Institute of Electrical and Electric Engineers industrial specification IEEE802.11 working group has successively defined 802.11a, 802.11b, and a series of WLAN technical standards such as 802.11g, mainly formulate physical layer (PHY) and media interviews and control (MAC) layer standard.Other task groups have appearred subsequently successively, be devoted to the standard that development relates to existing 802.11 technological improvements, for example, 802.11ah task groups is utilized mainly for the resource of exempting from licensed band below the 1GHz frequency range, for supporting intelligent grid, sensor network, the new network applications such as Cellular Networks load balancing.
In existing 802.11 technical specifications, its basic network architecture is an access website (access point, be called for short AP) and a plurality of non-access sites (the non-AP Station associated with AP, abbreviation STA) formed a Basic Service Set (basic service set, be called for short BSS), each Basic Service Set has a BSSID (basic service set identifier is called for short BSSID).Each website can adopt MAC Address as its identifier, associated identifiers (the association identifier that also can adopt AP associated therewith to distribute, be called for short AID) as its identifier, also can adopt associated identifiers is carried out to the result of Mathematical treatment as its identifier, Mathematical treatment comprises blocks (part AID), perhaps carry out hash (Hash) etc., processing method is that AP and website are known altogether, is in this collectively that partial association identifier (partial AID) is as its identifier, access point can adopt BSSID as its identifier, also can adopt a predefined particular value associated identifiers (association identifier of system, be called for short AID) as its identifier, also can adopt associated identifiers is carried out to the result of Mathematical treatment as its identifier, Mathematical treatment comprises blocks (part AID), perhaps carry out hash etc., processing method is that AP and website are known altogether, be in this collectively that partial association identifier (partial AID) is as its identifier, also can be simplified BSSID simultaneously, the method for simplifying of this method for simplifying and associated identifiers can be the same or different.AP can be divided into one group by a plurality of websites, and identify this grouping with an identifier, this identifier is referred to as group identifier (group ID), and in group, the position of website is fixed, thereby in group identifier and group, location index also can be for identifying a website.
802.11ah task groups is when formulating its technical specification, wish that the technical specification of 802.11ah continues to use the technical specification of existing 802.11 series as far as possible, in order to meet the peculiar attribute of 802.11ah itself, also can make suitable modification or formulate new technical specification existing technical specification simultaneously.The 802.11ah task groups determines that the bandwidth of operation of technology can be 1/2/4/8/16MHz at present; adopt the OFDM modulation technique; each OFDM symbol (comprising long protection interval) duration is 40 μ s, and in these relatively existing 802.11 series standards, the required time of holding of each OFDM symbol has enlarged 10 times.In other words, if adopt identical transmitting power to send identical information, the equipment power dissipation that adopts the 802.11ah technical specification will be to meet 10 times of existing 802.11 technical specification equipment, and in some country U.S. for example, the transmitting power of equipment that adopts the 802.11ah technical specification may be 20 times of at present existing 802.11 technical specification equipment, and this will make the equipment power dissipation of 802.11ah technical specification larger.But in the 802.11ah technical need, equipment has high requirements at the energy-saving square mask, thereby this just need to, with the more brief mode of intelligence transmission, complete corresponding function at present.
Carrying out communication while particularly carrying out multi-antenna transmission, the communication initiator need to carry out certain processing to sent information according to the channel situation between receiving-transmitting sides, and then sends.How the communication initiator knows the channel situation between receiving-transmitting sides, corresponding scheme has been arranged in current technical specification, concrete, transmit leg sends a radio frames with channel measurement informing function, short frame interFrameGap (short interframe space, be called for short SIFS) rear empty Frame (the null data packet for carrying out channel measurement of transmission, be called for short NDP), so-called empty Frame refers to and only comprises the short training sequence territory, the radio frames in signaling territory and long training sequence territory, after the recipient just receives the radio frames with channel measurement informing function, receive again the NDP frame and carry out channel measurement according to this frame.In the 802.11n technical specification, channel measurement notice refers to the NDP Announcment bit indication by the mac frame head of this radio frames, and acquiescence only has the recipient of this frame need to receive follow-up NDP to carry out channel measurement; In the 802.11ac technical specification, defined special channel measurement notice radio frames, be called VHT NDP Announcement frame, this notification frame can indicate the NDP that 1 or a plurality of recipient receive subsequently to carry out channel measurement; In these two kinds of technical specifications, radio frames and NDP with channel measurement informing function exist as a frame sequence, can not use separately.
Based on to the 802.11ah application scenarios particularly in the analysis of the scene of aware application, the site works time is shorter, the length of one's sleep is longer, operative scenario may be the high doppler shift scene, if still adopt and there is the radio frames of channel measurement informing function and the mechanism that NDP carries out channel measurement, the necessity that sends so the radio frames with channel measurement informing function is very low, and be unfavorable for energy-conservation, so the channel measurement mechanism existed at present not exclusively is applicable to the 802.11ah technology.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method and device of channel measurement, can meet the requirement of 802.11ah for channel measurement.
For solving the problems of the technologies described above, the method for a kind of channel measurement of the present invention comprises:
The channel measurement requesting party sends radio frames, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of described radio frames, indicating channel is measured the feedback root and is carried out channel measurement according to described channel measurement feedback indication information.
Further, the bandwidth information that described channel measurement feedback indication information comprises the channel that needs measurement and/or the bandwidth information that needs the channel of feedback.
Stream number information when the spatial flow number information that further, described channel measurement feedback indication information comprises indicating channel measurement feedback side's measurement or sky.
Further, when the channel measurement requesting party is access point, the associated identifiers that described channel measurement requesting party identification information is access point or partial association identifier or BSSID or part BSSID; When the channel measurement requesting party is website, described channel measurement requesting party identification information is media access control address or associated identifiers or partial association identifier.
Further, when channel measurement feedback side is access point, associated identifiers or partial association identifier or BSSID or part BSSID that described channel measurement feedback square mark information is access point; When channel measurement feedback side is website, described channel measurement feedback square mark information is media access control address or associated identifiers or partial association identifier.
Further, described channel measurement feedback square mark information is group identifier.
Further, when described channel measurement feedback square mark information is group identifier, described channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement.
Further, when described channel measurement feedback square mark information is group identifier, described channel measurement feedback indication information comprises in the indication group the at first indication information of the website of feedback channel metrical information.
Further, in described channel measurement feedback square mark information, it is group identifier, when described channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement, the spatial flow number information that described channel measurement feedback side is measured or when empty stream number information corresponding respectively with each website in group, the indication information of website that needs to carry out channel measurement in described indication group flows number information during for the spatial flow number information corresponding with each website or sky.
Further, described channel measurement feedback indication information comprises the measurement sequence number.
Further, described channel measurement requesting party also carries channel access subscription time information or length information in described signaling territory.
Further, a kind of method of channel measurement comprises:
Channel measurement feedback side is after receiving the radio frames that comprises channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information, determine whether channel measurement feedback square mark information points to self, when described channel measurement feedback square mark information points self, according to described channel measurement feedback indication information, carry out channel measurement.
Further, after the short frame interFrameGap of described channel measurement feedback side after receiving described radio frames, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
Further, also comprise:
Described channel measurement feedback side is before the feedback channel metrical information, in described channel measurement feedback square mark information, it is group identifier, and, when at first channel measurement feedback indication information comprises in the indication group indication information of the website of feedback channel metrical information, according to the indication information of the website of feedback channel metrical information at first in described indication group, after determining and being a short frame interFrameGap after radio frames, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
Further, channel measurement feedback side determines that whether channel measurement feedback square mark information points to self, comprising:
Described channel measurement feedback side is group identifier in described channel measurement feedback square mark information, and, when described channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement, according to the indication information that self whether belongs in described group and described indication group the website that needs to carry out channel measurement, determine whether channel measurement feedback square mark information points to self.
Further, a kind of device of channel measurement comprises: parameter configuration unit and transmitting element, wherein:
Described parameter configuration unit, measure requesting party's identification information, channel measurement feedback square mark information and channel measurement feedback indication information for configurating channel;
Described transmitting element, for sending radio frames, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of described radio frames, indicating channel is measured the feedback root and is carried out channel measurement according to described channel measurement feedback indication information.
Further, described channel measurement feedback indication information comprises the bandwidth information that needs the channel measured and/or the bandwidth information that needs the channel of feedback, and indicating channel flows number information while measuring the spatial flow number information measured feedback side or sky.
Further, when described channel measurement feedback square mark information is group identifier, described channel measurement feedback indication information comprises in the indication group in the indication information of the website that needs to carry out channel measurement and/or indication site groups the at first indication information of the website of feedback channel metrical information.
Further, when described channel measurement feedback square mark information is group identifier, the spatial flow number information that described channel measurement feedback side is measured or when empty stream number information corresponding respectively with each website in group, the indication information of website that needs to carry out channel measurement in described indication group flows number information during for the spatial flow number information corresponding with each website or sky.
Further, a kind of device of channel measurement comprises: receiving element, judging unit and measuring unit, wherein:
Described receiving element, the radio frames that comprises channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information for reception;
Described judging unit, after at described receiving element, receiving radio frames, determine whether channel measurement feedback square mark information points to self;
Described measuring unit, for when described channel measurement feeds back square mark information points self, carry out channel measurement according to described channel measurement feedback indication information.
Further, also comprise feedback unit, wherein:
Described feedback unit, after a short frame interFrameGap after receiving described radio frames at described receiving element, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
In sum, the present invention, when having guaranteed channel measurement notice and channel measurement function, reduces the radio frames traffic volume, improves efficiency of transmission, effectively reduces the traffic load expense, reduces power consumption, meets to a certain extent energy-conservation demand.
The accompanying drawing explanation
The flow chart of the method for the channel measurement that Fig. 1 is present embodiment;
The Organization Chart of the device of the first channel measurement that Fig. 2 is present embodiment;
The Organization Chart of the device that the second channel that Fig. 3 is present embodiment is measured.
Embodiment
In present embodiment, the channel measurement requesting party sends radio frames, wherein, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of radio frames, indicating channel is measured the feedback root and be it is believed that measuring the feedback indication information carries out channel measurement feedback channel metrical information.After channel measurement feedback side receives radio frames, according to channel measurement feedback indication information, carry out channel measurement feedback channel metrical information.
Method below in conjunction with accompanying drawing to the channel measurement of present embodiment describes.
As shown in Figure 1, the method for the channel measurement of present embodiment comprises:
Step 101: the channel measurement requesting party sends radio frames, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of radio frames, indicating channel is measured the feedback root and be it is believed that measuring the feedback indication information carries out channel measurement feedback channel metrical information;
Radio frames is an empty Frame for channel measurement.
When the channel measurement requesting party is access point, the associated identifiers that channel measurement requesting party identification information is access point or partial association identifier or BSSID or part BSSID; When the channel measurement requesting party is website, channel measurement requesting party identification information is MAC Address or associated identifiers or partial association identifier.
When channel measurement feedback side is access point, associated identifiers or partial association identifier or BSSID or part BSSID that channel measurement feedback square mark information is access point; When channel measurement feedback side is website, channel measurement feedback square mark information is MAC Address or associated identifiers or partial association identifier.
The bandwidth information that channel measurement feedback indication information comprises the channel that needs measurement and/or the bandwidth information that needs the channel of feedback; The bandwidth information indicating channel of the channel that need measure is measured the bandwidth of the channel of being measured feedback side, the bandwidth of using when the channel measurement requesting party sends metrical information.Need the bandwidth information indicating channel of the channel of feedback to measure the bandwidth that feedback side's actual needs feeds back, for example, needing the bandwidth of measuring is 40MHz, needs the bandwidth of feedback may only have 20MHz, and other information can not fed back.
Stream number information when the spatial flow number information that channel measurement feedback indication information comprises channel measurement requesting party indicating channel measurement feedback side's measurement or sky.
When channel measurement feedback square mark information adopts group identifier, channel measurement feedback square mark information points group, channel measurement feedback indication information comprises in the indication group the at first indication information of the website of feedback channel metrical information.
When channel measurement feedback square mark information adopts group identifier, channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement.
Need to carry out the indication information of the website of channel measurement in the indication group, stream number information indication when the spatial flow number information that can measure by each channel measurement feedback side or sky, when channel measurement feedback square mark information is group identifier, the spatial flow number information that channel measurement feedback side is measured or when empty stream number information corresponding respectively with each website in group, the indication information of website that needs to carry out channel measurement in the indication group flows number information during for the spatial flow number information corresponding with each website or sky; Perhaps, by special information bit indication is set.
Channel measurement feedback indication information comprises that is measured a sequence number, a sequence number avoiding radio frames to repeat.
The signaling territory also comprises a channel access subscription time information or length information, audit website hear after this time, at this moment between the section in can competitive channel.
The signaling territory also comprises cyclic redundancy check information.
Step 102: channel measurement feedback side receives radio frames, when the channel measurement of radio frames feeds back square mark information points self, carry out channel measurement according to channel measurement feedback indication information, after waiting for a short frame interFrameGap, to channel measurement requesting party feedback channel metrical information.
When the channel measurement of radio frames feedback square mark information is group identifier, this channel measurement feedback side belongs to the group of group identifier indication and need to carry out channel measurement and needs to feed back immediately simultaneously, after waiting for a short frame interFrameGap, to channel measurement requesting party feedback channel metrical information;
When the channel measurement of radio frames feedback square mark information is group identifier, this channel measurement feedback side belongs to the group of group identifier indication and need to carry out channel measurement but not need feeding back immediately, after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
Channel measurement feedback side is group identifier in channel measurement feedback square mark information, and, when at first channel measurement feedback indication information comprises in the indication group indication information of the website of feedback channel metrical information, according to the indication information of the website of feedback channel metrical information at first in the indication group, after determining and being a short frame interFrameGap after radio frames, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
Channel measurement feedback side is group identifier in channel measurement feedback square mark information, and, when channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement, according to the indication information that self whether belongs in group and indication group the website that needs to carry out channel measurement, determine whether channel measurement feedback square mark information points to self.
Embodiment 1:
Suppose in the 802.11ah network, comprise 1 AP and 2 STA, be expressed as respectively STA1 and STA2, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, the span of N, N1 and N2 is to be more than or equal to 1 natural number.
Data to be launched for STA1 are now arranged in AP, but AP does not have the channel information of link between AP and STA1, AP needs STA1 carry out channel measurement and channel measurement information is fed back to AP, for AP, now AP is the channel measurement requesting party, and STA1 is channel measurement feedback side.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise: (in following description, information being carried in corresponding field)
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feeds back square mark information, fills in the AID of STA1, or, the part AID of STA1;
Spatial flow or basin when empty, bearing space stream or stream number information when empty, the spatial flow that indication STA1 measures or stream number when empty; The bandwidth territory, the bandwidth information of the channel that carrying need to be measured and/or need the bandwidth information of the channel of feedback, the bandwidth of the channel that indication STA1 measures; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is oneself, and STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory.
After STA2 receives the NDP of this AP transmission, by detecting the frame type territory, know that this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is STA1, is not oneself, and STA2 abandons this NDP.
Embodiment 2:
Suppose in the 802.11ah network, comprise 1 AP and 2 STA, be expressed as respectively STA1 and STA2, wherein AP configures N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, the span of N, N1 and N2 is to be more than or equal to 1 natural number.
Data to be launched for STA1 are now arranged in AP, but AP does not have the channel information of link between AP and STA1, AP needs STA1 to carry out channel measurement and channel measurement information is fed back to AP for AP, and now AP is the channel measurement requesting party, and STA1 is channel measurement feedback side.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
Length field, this territory is set to particular value, for example is set to zero, and indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feeds back square mark information, fills in the AID of STA1, or, the part AID of STA1;
Basin when spatial flow or sky, stream number when the spatial flow that indication STA1 measures or sky; The bandwidth territory, the channel width that indication STA1 measures; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting length field this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is oneself, and STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory.
After STA2 receives the NDP of this AP transmission, by detecting the frame length territory, know that this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is STA1, is not oneself, and STA2 abandons this NDP.
Embodiment 3:
Suppose in the 802.11ah network, comprise 1 AP and 2 STA, be expressed as respectively STA1 and STA2, wherein AP configures N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, the span of N, N1 and N2 is to be more than or equal to 1 natural number.
Data to be launched for STA1 are now arranged in AP, but AP does not have the channel information of link between AP and STA1, AP needs STA1 to carry out channel measurement and channel measurement information is fed back to AP for AP, and now AP is the channel measurement requesting party, and STA1 is channel measurement feedback side.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
，Ci territory, MCS territory is set to particular value, untapped MCS value 11 to 15 still in 802.11ac for example, and indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feeds back square mark information, fills in the AID of STA1, or, the part AID of STA1;
Basin when spatial flow or sky, stream number when the spatial flow that indication STA1 measures or sky; The bandwidth territory, the channel width that indication STA1 measures; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, by detecting the MCS territory, know that this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is oneself, and STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory.
After STA2 receives the NDP of this AP transmission, by detecting the MCS territory, know that this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is STA1, is not oneself, and STA2 abandons this NDP.
Embodiment 4:
Suppose in the 802.11ah network, comprise 1 AP and 2 STA, be expressed as respectively STA1 and STA2, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, the span of N, N1 and N2 is to be more than or equal to 1 natural number.
Data to be launched for STA1 are now arranged in AP, but AP does not have the channel information of link between AP and STA1, AP needs STA1 carry out channel measurement and channel measurement information is fed back to AP, for AP, now AP is the channel measurement requesting party, and STA1 is channel measurement feedback side.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feeds back square mark information, fills in the AID of STA1, or, the part AID of STA1;
Basin when spatial flow or sky, stream number when the spatial flow that indication STA1 measures or sky; The bandwidth territory, the channel width that indication STA1 measures; The subscription time territory, the channel access time of indication reservation; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is oneself, and STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory.
After STA2 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is STA1, be not oneself, STA2 abandons this NDP, and the value in extraction subscription time territory is upgraded the network allocation vector of oneself according to rule.
Embodiment 5:
Suppose in the 802.11ah network, comprise 1 AP and 2 STA, be expressed as respectively STA1 and STA2, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, the span of N, N1 and N2 is to be more than or equal to 1 natural number.
Data to be launched for STA1 are now arranged in AP, but AP does not have the channel information of link between AP and STA1, AP needs STA1 carry out channel measurement and channel measurement information is fed back to AP, for AP, now AP is the channel measurement requesting party, and STA1 is channel measurement feedback side.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feeds back square mark information, fills in the AID of STA1, or, the part AID of STA1;
Basin when spatial flow or sky, stream number when the spatial flow that indication STA1 measures or sky; The bandwidth territory, the channel width that indication STA1 measures; Measure sequence number field, for identifying this NDP frame; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is oneself, and STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory.
After STA2 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is STA1, be not oneself, STA2 abandons this NDP, and, extract the value of measuring sequence number field and upgrade the network allocation vector of oneself according to rule.
Embodiment 6:
Suppose in the 802.11ah network, comprise 1 AP and 2 STA, be expressed as respectively STA1 and STA2, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, the span of N, N1 and N2 is to be more than or equal to 1 natural number.
The data to be launched of the oriented AP of STA1 now, but STA1 does not have the channel information of link between STA1 and AP, STA1 needs AP carry out channel measurement and channel measurement information is fed back to STA1, for STA1, now STA1 is the channel measurement requesting party, and AP is channel measurement feedback side.
After STA1 obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of STA1, or, the part AID of STA1;
Channel measurement feeds back square mark information, fills in the AID of AP, or, the part AID of AP, or, the part BSSID;
Basin when spatial flow or sky, stream number when the spatial flow that indication STA1 measures or sky; The bandwidth territory, the channel width that indication STA1 measures; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After AP receives the NDP of this STA1 transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is oneself, and AP utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory.
After STA2 receives the NDP of this STA1 transmission, by detecting the frame type territory, know that this frame is a NDP who carries out channel measurement, the recipient of channel measurement feedback square mark information indication is AP, is not oneself, and STA2 abandons this NDP.
Embodiment 7:
Suppose in the 802.11ah network, comprise 1 AP and 5 STA, be expressed as respectively STA1, STA2, STA3, STA4 and STA5, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, STA3 configuration N3 root dual-mode antenna, STA4 configuration N4 root dual-mode antenna, STA5 configuration N5 root dual-mode antenna, N, N1, N2, N3, the span of N4 and N5 is to be more than or equal to 1 natural number, AP has been divided into two groups by 5 STA, group identifier is respectively GID1 and GID2, wherein the STA in GID1 comprises STA1, STA2, STA3, STA4, STA in GID2 comprises STA5, STA4, STA3, STA1, putting in order of top STA is also the position of website in organizing separately.
Now AP carries out channel measurement as the website in channel measurement requestor requests GID1 group.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feedback square mark information, fill in GID1;
Spatial flow or basin when empty, the spatial flow that in the indication group, website is measured or stream number when empty, only have a numerical value, implication is that each website needs to measure, and need the spatial flow measured or when empty the stream number identical; The bandwidth territory, the channel width that in the indication group, website is measured; Carry out the indication territory of the website of channel measurement information feedback after SIFS, value is N, the website of location index N indication in the expression group, and N is since 0 value, and this embodiment value is 1, and corresponding website is STA2; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, but the location index of STA1 in GID1 number is 0, is not to carry out the website of channel feedback after AP requirement SIFS, therefore STA1 buffer memory channel measurement information, fed back after the scheduling of wait AP again.
After STA2 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, STA1 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, and the location index of STA2 in GID1 number is 1, is to carry out the website of channel feedback after AP requirement SIFS, therefore, after SIFS, STA2 is to AP feedback channel metrical information.
After STA3 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, STA3 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, but the location index of STA3 in GID1 number is 2, is not to carry out the website of channel feedback after AP requirement SIFS, therefore STA3 buffer memory channel measurement information, fed back after the scheduling of wait AP again.
After STA4 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, STA4 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, but the location index of STA4 in GID1 number is 3, is not to carry out the website of channel feedback after AP requirement SIFS, therefore STA4 buffer memory channel measurement information, fed back after the scheduling of wait AP again.
After STA5 receives the NDP of this AP transmission, by detecting the frame type territory, know that this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself does not belong to this group, and STA5 abandons this NDP.
Embodiment 8:
Suppose in the 802.11ah network, comprise 1 AP and 5 STA, be expressed as respectively STA1, STA2, STA3, STA4 and STA5, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, STA3 configuration N3 root dual-mode antenna, STA4 configuration N4 root dual-mode antenna, STA5 configuration N5 root dual-mode antenna, N, N1, N2, N3, the span of N4 and N5 is to be more than or equal to 1 natural number, AP has been divided into two groups by 5 STA, group identifier is respectively GID1 and GID2, wherein the STA in GID1 comprises STA1, STA2, STA3, STA4, STA in GID2 comprises STA5, STA4, STA3, STA1, putting in order of top STA is also the position of website in organizing separately.
Now AP carries out channel measurement as the website in channel measurement requestor requests GID1 group.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feedback square mark information, fill in GID1;
Basin when spatial flow or sky, stream number when the spatial flow that in the indication group, website is measured or sky, only have a numerical value, be used in conjunction with website channel measurement indication territory in group, the website that indication need to be carried out channel measurement according to the spatial flow of this territory indication or when empty the stream number measured; The bandwidth territory, the channel width that in the indication group, website is measured; Carry out the indication territory of the website of channel measurement information feedback after SIFS, value is N, the website of location index N indication in the expression group, and N is since 0 value, and this embodiment value is 1, and corresponding website is STA2; Website channel measurement indication territory in group, being used to indicate which website in group need to carry out channel measurement which not need to carry out channel measurement, can adopt the form of bitmap, the corresponding bit of each website in organizing, this territory of this embodiment comprises 4 bits, bit supposition value XSSX, wherein S means to carry out channel feedback, X means not carry out channel measurement, therefore STA2 and STA3 need to carry out channel measurement, STA1 and STA4 do not need to carry out channel measurement; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, but in group, the website channel measurement indicates bit value X corresponding to STA1 in territory to indicate STA1 not need to carry out channel measurement, therefore STA1 abandons this NDP.
After STA2 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, in group, the website channel measurement indicates bit value S corresponding to STA2 in territory to indicate STA2 need to carry out channel measurement, STA2 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, the location index of STA2 in GID1 number is 1, to carry out the website of channel feedback after AP requirement SIFS, therefore, after SIFS, STA2 is to AP feedback channel metrical information.
After STA3 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, in group, the website channel measurement indicates bit value S corresponding to STA3 in territory to indicate STA3 need to carry out channel measurement, STA3 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, but the location index of STA3 in GID1 number is 2, not to carry out the website of channel feedback after AP requirement SIFS, therefore STA3 buffer memory channel measurement information, after the scheduling of wait AP, fed back again.
After STA4 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, but in group, the website channel measurement indicates bit value X corresponding to STA4 in territory to indicate STA4 not need to carry out channel measurement, therefore STA4 abandons this NDP.
After STA5 receives the NDP of this AP transmission, by detecting the frame type territory, know that this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself does not belong to this group, and STA5 abandons this NDP.
Embodiment 9:
Suppose in the 802.11ah network, comprise 1 AP and 5 STA, be expressed as respectively STA1, STA2, STA3, STA4 and STA5, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, STA3 configuration N3 root dual-mode antenna, STA4 configuration N4 root dual-mode antenna, STA5 configuration N5 root dual-mode antenna, N, N1, N2, N3, the span of N4 and N5 is to be more than or equal to 1 natural number, AP has been divided into two groups by 5 STA, group identifier is respectively GID1 and GID2, wherein the STA in GID1 comprises STA1, STA2, STA3, STA4, STA in GID2 comprises STA5, STA4, STA3, STA1, putting in order of top STA is also the position of website in organizing separately.
Now AP carries out channel measurement as the website in channel measurement requestor requests GID1 group.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feedback square mark information, fill in GID1;
Basin when spatial flow or sky, the corresponding value of each website in group, be used to indicate that each website in group needs the spatial flow measured separately or stream number when empty, suppose STA1 correspondence 0 in this embodiment, STA2 correspondence 1, STA3 correspondence 2, STA4 correspondence 0, be that STA2 and STA3 need to carry out channel measurement, when the spatial flow that need to measure or sky, the stream number corresponds to respectively 1 and 2, STA1 and STA4 do not need to carry out channel measurement, and the concrete corresponding concrete meaning of value can have other mapping relations not only for this embodiment; The bandwidth territory, the channel width that in the indication group, website is measured; Carry out the website indication territory of channel measurement information feedback after SIFS, value is N, the website of location index N indication in the expression group, and N is since 0 value, and this embodiment value is 1, and corresponding website is STA2; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, but spatial flow or when empty in basin value corresponding to STA1 be 0, indicate STA1 not need to carry out channel measurement, therefore STA1 abandons this NDP.
After STA2 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, spatial flow or when empty in the territory, basin value corresponding to STA2 be 1, indicate STA2 need to carry out channel measurement, and when the spatial flow that need to measure or sky, the stream number is 1, STA2 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, the location index of STA2 in GID1 number is 1, to carry out the website of channel feedback after AP requirement SIFS, therefore after SIFS, STA2 is to AP feedback channel metrical information.
After STA3 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, spatial flow or when empty in the territory, basin value corresponding to STA3 be 2, indicate STA3 need to carry out channel measurement, and when the spatial flow that need to measure or sky, the stream number is 2, STA3 utilizes NDP and completes channel measurement in conjunction with other information in the signaling territory, but the location index of STA3 in GID1 number is 2, not to carry out the website of channel feedback after AP requirement SIFS, therefore STA3 buffer memory channel measurement information, after the scheduling of wait AP, fed back again.
After STA4 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, but spatial flow or when empty in basin value corresponding to STA4 be 0, indicate STA4 not need to carry out channel measurement, therefore STA4 abandons this NDP.
After STA5 receives the NDP of this AP transmission, by detecting the frame type territory, know that this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself does not belong to this group, and STA5 abandons this NDP.
Embodiment 10:
Suppose in the 802.11ah network, comprise 1 AP and 5 STA, be expressed as respectively STA1, STA2, STA3, STA4 and STA5, wherein, AP configuration N root dual-mode antenna, STA1 configuration N1 root dual-mode antenna, STA2 configuration N2 root dual-mode antenna, STA3 configuration N3 root dual-mode antenna, STA4 configuration N4 root dual-mode antenna, STA5 configuration N5 root dual-mode antenna, N, N1, N2, N3, the span of N4 and N5 is to be more than or equal to 1 natural number, AP has been divided into two groups by 5 STA, group identifier is respectively GID1 and GID2, wherein the STA in GID1 comprises STA1, STA2, STA3, STA4, STA in GID2 comprises STA5, STA4, STA3, STA1, putting in order of top STA is also the position of website in organizing separately.And needed in the agreement group to carry out channel measurement, and the most forward website in position feedback channel metrical information at first.
Now AP carries out channel measurement as the website in channel measurement requestor requests GID1 group.
After AP obtains the channel access chance, transmitting channel is measured frame NDP, and NDP is comprised of short training sequence territory, first's long training sequence territory, signaling territory and second portion long training sequence territory; Wherein, in the signaling territory of the physical layer frame head of NDP, comprise:
The frame type territory, indicating this frame is the NDP that carries out channel measurement;
Channel measurement requesting party identification information, fill in the AID of AP, or, the part AID of AP, or, the part BSSID;
Channel measurement feedback square mark information, fill in GID1;
Basin when spatial flow or sky, the corresponding value of each website in group, be used to indicate that each website in group needs the spatial flow measured separately or stream number when empty, suppose STA1 correspondence 0 in this embodiment, STA2 correspondence 1, STA3 correspondence 2, STA4 correspondence 0, be that STA2 and STA3 need to carry out channel measurement, when the spatial flow that need to measure or sky, the stream number corresponds to respectively 1 and 2, STA1 and STA4 do not need to carry out channel measurement, and the concrete corresponding concrete meaning of value can have other mapping relations not only for this embodiment; The bandwidth territory, the channel width that in the indication group, website is measured; Retain territory, still untapped territory and cyclic redundancy check information territory in the signaling territory, to the verification sequence in signaling territory.
After STA1 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, but spatial flow or when empty in basin value corresponding to STA1 be 0, indicate STA1 not need to carry out channel measurement, therefore STA1 abandons this NDP.
After STA2 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, spatial flow or when empty in the territory, basin value corresponding to STA2 be 1, indicate STA2 need to carry out channel measurement, and in the website that needs in this group to measure, the position of oneself is the most forward (comes the STA1 that only has before it, but STA1 does not need to carry out channel measurement), therefore carrying out the website of channel feedback after SIFS is oneself, after SIFS, STA2 is to AP feedback channel metrical information.
After STA3 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, spatial flow or when empty in the territory, basin value corresponding to STA3 be 2, indicate STA3 need to carry out channel measurement, owing at the forward website in the group own position of internal ratio, STA1 and STA2 being arranged, and STA2 need to carry out channel measurement, so can not carry out immediately channel feedback after SIFS, therefore STA3 buffer memory channel measurement information, fed back after the scheduling of wait AP again.
After STA4 receives the NDP of this AP transmission, know that by detecting the frame type territory this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself belong to this group, but spatial flow or when empty in the territory, basin value corresponding to STA4 be 0, indicate STA4 not need to carry out channel measurement, therefore STA4 abandons this NDP.
After STA5 receives the NDP of this AP transmission, by detecting the frame type territory, know that this frame is a NDP who carries out channel measurement, channel measurement feedback square mark information indication GID1 group, oneself does not belong to this group, and STA5 abandons this NDP.
As shown in Figure 2, present embodiment also provides a kind of device of channel measurement, comprising: parameter configuration unit and transmitting element, wherein:
Parameter configuration unit, measure requesting party's identification information, channel measurement feedback square mark information and channel measurement feedback indication information for configurating channel;
Transmitting element, for sending radio frames, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of radio frames, indicating channel is measured the feedback root and be it is believed that measuring the feedback indication information carries out channel measurement.
Channel measurement feedback indication information comprises the bandwidth information that needs the channel measured and/or the bandwidth information that needs the channel of feedback, and indicating channel flows number information while measuring the spatial flow number information measured feedback side or sky.
When channel measurement feedback square mark information is group identifier, channel measurement feedback indication information comprises in the indication group in the indication information of the website that needs to carry out channel measurement and/or indication site groups the at first indication information of the website of feedback channel metrical information.
When channel measurement feedback square mark information is group identifier, the spatial flow number information that channel measurement feedback side is measured or when empty stream number information corresponding respectively with each website in group, the indication information of website that needs to carry out channel measurement in the indication group flows number information during for the spatial flow number information corresponding with each website or sky.
The device of another channel measurement that present embodiment provides as shown in Figure 3 comprises: receiving element, judging unit and measuring unit, wherein:
Receiving element, the radio frames that comprises channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information for reception;
Judging unit, after at receiving element, receiving radio frames, determine whether channel measurement feedback square mark information points to self;
Measuring unit, for when channel measurement feeds back square mark information points self, carry out channel measurement according to channel measurement feedback indication information.
This device also comprises feedback unit, wherein:
Feedback unit, after one after receiving radio frames at receiving element short frame interFrameGap, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (21)
1. the method for a channel measurement, is characterized in that, comprising:
The channel measurement requesting party sends radio frames, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of described radio frames, indicating channel is measured the feedback root and is carried out channel measurement according to described channel measurement feedback indication information.
2. the method for claim 1, is characterized in that, the bandwidth information that described channel measurement feedback indication information comprises the channel that needs measurement and/or the bandwidth information that needs the channel of feedback.
3. the method for claim 1, is characterized in that, stream number information when the spatial flow number information that described channel measurement feedback indication information comprises indicating channel measurement feedback side's measurement or sky.
4. the method for claim 1, it is characterized in that, when the channel measurement requesting party is access point, the associated identifiers that described channel measurement requesting party identification information is access point or partial association identifier or BSSID or part BSSID; When the channel measurement requesting party is website, described channel measurement requesting party identification information is media access control address or associated identifiers or partial association identifier.
5. the method for claim 1, it is characterized in that, when channel measurement feedback side is access point, associated identifiers or partial association identifier or BSSID or part BSSID that described channel measurement feedback square mark information is access point; When channel measurement feedback side is website, described channel measurement feedback square mark information is media access control address or associated identifiers or partial association identifier.
6. the method for claim 1, is characterized in that, described channel measurement feedback square mark information is group identifier.
7. method as claimed in claim 6, is characterized in that, when described channel measurement feedback square mark information is group identifier, described channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement.
8. method as claimed in claim 6, is characterized in that, when described channel measurement feedback square mark information is group identifier, described channel measurement feedback indication information comprises in the indication group the at first indication information of the website of feedback channel metrical information.
9. method as claimed in claim 3, it is characterized in that, in described channel measurement feedback square mark information, it is group identifier, when described channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement, the spatial flow number information that described channel measurement feedback side is measured or when empty stream number information corresponding respectively with each website in group, the indication information of website that needs to carry out channel measurement in described indication group flows number information during for the spatial flow number information corresponding with each website or sky.
10. the method for claim 1, is characterized in that, described channel measurement feedback indication information comprises the measurement sequence number.
11. the method for claim 1, is characterized in that, described channel measurement requesting party also carries channel access subscription time information or length information in described signaling territory.
12. the method for a channel measurement, is characterized in that, comprising:
Channel measurement feedback side is after receiving the radio frames that comprises channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information, determine whether channel measurement feedback square mark information points to self, when described channel measurement feedback square mark information points self, according to described channel measurement feedback indication information, carry out channel measurement.
13. method as claimed in claim 12, is characterized in that, after the short frame interFrameGap of described channel measurement feedback side after receiving described radio frames, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
14. method as claimed in claim 13, is characterized in that, also comprises:
Described channel measurement feedback side is before the feedback channel metrical information, in described channel measurement feedback square mark information, it is group identifier, and, when at first channel measurement feedback indication information comprises in the indication group indication information of the website of feedback channel metrical information, according to the indication information of the website of feedback channel metrical information at first in described indication group, after determining and being a short frame interFrameGap after radio frames, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
15. method as claimed in claim 12, is characterized in that, channel measurement feedback side determines that whether channel measurement feedback square mark information points to self, comprising:
Described channel measurement feedback side is group identifier in described channel measurement feedback square mark information, and, when described channel measurement feedback indication information comprises in the indication group indication information of the website that needs to carry out channel measurement, according to the indication information that self whether belongs in described group and described indication group the website that needs to carry out channel measurement, determine whether channel measurement feedback square mark information points to self.
16. the device of a channel measurement, is characterized in that, comprising: parameter configuration unit and transmitting element, wherein:
Described parameter configuration unit, measure requesting party's identification information, channel measurement feedback square mark information and channel measurement feedback indication information for configurating channel;
Described transmitting element, for sending radio frames, carry channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information in the signaling territory of the physical layer frame head of described radio frames, indicating channel is measured the feedback root and is carried out channel measurement according to described channel measurement feedback indication information.
17. device as claimed in claim 16, it is characterized in that: described channel measurement feedback indication information comprises the bandwidth information that needs the channel measured and/or the bandwidth information that needs the channel of feedback, and indicating channel flows number information while measuring the spatial flow number information measured feedback side or sky.
18. device as claimed in claim 17, it is characterized in that: when described channel measurement feedback square mark information is group identifier, described channel measurement feedback indication information comprises in the indication group in the indication information of the website that needs to carry out channel measurement and/or indication site groups the at first indication information of the website of feedback channel metrical information.
19. device as claimed in claim 18, it is characterized in that, when described channel measurement feedback square mark information is group identifier, the spatial flow number information that described channel measurement feedback side is measured or when empty stream number information corresponding respectively with each website in group, the indication information of website that needs to carry out channel measurement in described indication group flows number information during for the spatial flow number information corresponding with each website or sky.
20. the device of a channel measurement, is characterized in that, comprising: receiving element, judging unit and measuring unit, wherein:
Described receiving element, the radio frames that comprises channel measurement requesting party identification information, channel measurement feedback square mark information and channel measurement feedback indication information for reception;
Described judging unit, after at described receiving element, receiving radio frames, determine whether channel measurement feedback square mark information points to self;
Described measuring unit, for when described channel measurement feeds back square mark information points self, carry out channel measurement according to described channel measurement feedback indication information.
21. device as claimed in claim 19, is characterized in that, also comprises feedback unit, wherein:
Described feedback unit, after a short frame interFrameGap after receiving described radio frames at described receiving element, to channel measurement requesting party feedback channel metrical information; Or after channel measurement requesting party scheduling, to channel measurement requesting party feedback channel metrical information.
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