CN104579616B - A kind of multiple antennas multichannel polymerize multi-site parallel polling method - Google Patents
A kind of multiple antennas multichannel polymerize multi-site parallel polling method Download PDFInfo
- Publication number
- CN104579616B CN104579616B CN201510053450.1A CN201510053450A CN104579616B CN 104579616 B CN104579616 B CN 104579616B CN 201510053450 A CN201510053450 A CN 201510053450A CN 104579616 B CN104579616 B CN 104579616B
- Authority
- CN
- China
- Prior art keywords
- channel
- working
- station
- access point
- site
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/20—Arrangements affording multiple use of the transmission path using different combinations of lines, e.g. phantom working
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of multiple antennas multichannel to polymerize multi-site parallel polling method.For large-scale distributed website gathered data it is inefficient the problem of, the present invention proposes a kind of multiple antennas multichannel polymerization multi-site parallel polling method.In the case of access point AP configuration multiple antennas multichannel, acquisition terminal configuration single antenna multichannel, based on existing IEEE 802.11ac communication standards, a kind of polymerization multi-site CF Poll control frames are devised, and gives specific single channel between more radio frequency multichannel AP and single antenna website and polymerize multi-site polling method and multiple antennas multichannel polymerization multi-site parallel polling method.This method is particularly suitable for a small amount of director data of downlink transfer, the asymmetric data transmission applications scene that up website is more and single gathered data amount is little.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a multi-antenna multi-channel aggregation multi-site parallel polling method. The method designs a CF-Poll control frame of a multi-site aggregation, and provides a specific single-channel aggregation multi-site polling method and a multi-antenna multi-channel aggregation multi-site parallel polling method between a multi-radio frequency multi-channel Access Point (AP) and a single-antenna site.
Background
Common application scenarios of large-scale wireless acquisition are as follows: the method comprises the following steps of electric power high-voltage transmission line health monitoring, highway and railway bridge deformation monitoring, reservoir dam deformation monitoring, earthquake area intensity monitoring, landslide and debris flow field data acquisition, hydrology and water quality environment monitoring and the like.
The information transmission of the large-scale wireless acquisition stations has the following characteristics: (1) The data are not required to be transmitted up at any time, and the data are periodically collected and uploaded, and the interval period can be minute or even hour. (2) The number of sites is large and the location distribution may be uneven due to factors such as terrain. (3) The data information of each station is very important, and needs to be reliably transmitted in relation to the life and property safety of common people.
For large-scale distributed site information acquisition, a traditional contention-based channel access mode cannot be adopted, so that Quality of Service (QoS) of communication cannot be guaranteed. Therefore, data transmission is generally performed by a centralized polling method of Access Points (APs).
The existing polling method based on IEEE 802.11 is that an AP performs single-site polling on a certain channel, as shown in fig. 1, the operating principle is as follows: the AP firstly establishes a Contention Free Period (CFP) through a beacon frame, then the AP uses CF-Poll to Poll each station in turn, the station transmits data to the AP in turn and confirms, the AP confirms and polls the next station, and the steps are repeated until the CF-End is reached, namely the CFP is finished. However, the method for the AP to poll the single station one by one through the single channel is not efficient, and particularly has a significant disadvantage when facing a large-scale station. There is a great need for those skilled in the art to solve the corresponding technical problems.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and particularly innovatively provides a multi-antenna multi-channel aggregation multi-site parallel polling method.
In order to achieve the above object, the present invention provides a method for performing multi-antenna multi-channel aggregation and multi-site parallel polling, which is characterized by comprising the following steps:
step 1, an access point AP configures M antennas and N working channels, each antenna utilizes one or more working channels, or a plurality of antennas share one working channel, each working channel corresponds to one working frequency point, J stations with single antenna and multiple channels are configured, the working frequency point and the channel bandwidth configured by each station are the same as those of the access point AP, and the initial working frequency f of the access point AP and the acquisition station 0 And the total channel bandwidth B are known, and M, N and J are positive integers;
step 2, the access point AP establishes a contention free period CFP through a beacon frame regularly, and then sends an aggregation multi-site CF-Poll frame, wherein the aggregation multi-site CF-Poll frame comprises received MAC addresses of all sites needing to be polled in the contention free period CFP;
and 3, all the stations perform full-working channel scanning, receive the aggregated multi-station CF-Poll frame, check whether the MAC address field of each station is consistent with the receiving address field sent by the access point AP, determine the working frequency point and the channel bandwidth of the corresponding station from the aggregated multi-station CF-Poll frame in the state that the address fields are consistent, keep synchronization with the access point AP of the working frequency point, and send the acquired data to the access point AP in sequence according to the sequence of the polling station MAC address fields sent by the access point AP until the access point AP acquires the data of all the stations.
Preferably, the method for multi-antenna multi-channel aggregation and multi-site parallel polling includes, in step 1:
the access point AP is provided with M antennas, the interval between the antennas is larger than lambda/2, wherein lambda is the wavelength corresponding to the working frequency point, N mutually independent orthogonal working channels are provided, each working channel carries out dynamic bandwidth allocation and is B 1 ，…，B N (ii) a Each working channel corresponds to a working frequency point, and the relation between the working frequency point and the channel bandwidth is
Wherein f is i For actual operating frequency point values, f 0 To initiate the value of the radio frequency operating frequency point,is the sum of the first i-1 channel bandwidths, B i For each channel bandwidth value, k&And lt, i, and k and i are positive integers.
Preferably, the method for performing multi-antenna multi-channel aggregation and multi-site parallel polling in step 2 includes:
the design process of the designed aggregation multi-site CF-Poll control frame is that the type of the MAC header frame control field of the aggregation multi-site CF-Poll frame is set to be 01 control with 2 bits, and the subtype is 0011 with 4 bits; in the address field of the MAC header, a target address TA is the MAC address of an access point AP, and receiving addresses RA1, \8230;, RAn is the MAC addresses of all stations needing to be polled in a CFP stage associated with the access point AP; CO is a channel operation field and completes radio frequency working frequency point mapping and channel bandwidth mapping; the other fields of the control frame set default reference IEEE 802.11ac.
Preferably, in the multi-antenna multi-channel aggregation multi-site parallel polling method, step 2 includes:
the number of AP working channels is N, and the bandwidth of each working channel is B N Total channel bandwidth of(ii) a And the starting frequency of the channel bandwidth is f 0 Then the mapping relationship between the actual channel working frequency point and the working frequency point in the CO field is
f i ＝f 0 +(L+1)B 0 ,0≤L≤255，
Wherein f is 0 Is the starting frequency of the channel bandwidth, B 0 The minimum fixed bandwidth is L, the minimum fixed bandwidth number of the interval between the channel working frequency point and the initial frequency is L, and the decimal L is mapped into a working frequency point mapping field of 1 byte corresponding to CO after being converted into an unsigned binary number;
working frequency point f 0 After fixation, determining the channel bandwidth of the access point AP polling station in the contention free period CFP, and then mapping the actual channel bandwidth to the channel bandwidth in the CO field to obtain the channel bandwidth
B i ＝(K+1)B 0 ,0≤K≤255，
Wherein K is a working frequency point f 0 As a center, B i The channel contains a minimum fixed bandwidth B 0 K is the minimum fixed bandwidth number of the interval between the channel bandwidth and the starting frequency, and the decimal K is mapped into a channel bandwidth mapping field of 1 byte corresponding to the CO after being converted into an unsigned binary number.
Preferably, the method for performing multi-antenna multi-channel aggregation and multi-site parallel polling in step 3 includes:
step 3-1, the access point AP transmits beacon frames at different radio frequency points through different antennas to establish CFPs working at different frequency points, the length of the CFPs is controlled by the access point AP, the maximum time length of the CFPs is specified by CFPMaxTransmission parameters in the CF parameter set of the beacon frames, and if the time length of the CFPs is longer than the interval of the beacon frames, the access point AP transmits the beacon frames at a proper time in the CFP period; the access point AP ensures that this duration is always no greater than cfpmaxduration;
step 3-2, after the access point AP sends the beacon frame, it will continue to send an aggregate multi-site CF-Poll frame, which contains the received MAC address of the associated site that needs to be polled during the CFP;
step 3-3, after all stations scan through the working channel, receiving the aggregation multi-station CF-Poll frame, checking whether the MAC address of the receiving address RA field in the aggregation multi-station CF-Poll frame is the same as the MAC address of the station, and if the MAC address is different from the MAC address of the station, updating the NAV value of the network allocation vector of the station according to the value of the duration field in the station; if the working frequency point is the same as the working frequency point, the receiving station determines the working frequency point and the channel bandwidth thereof according to the channel operation CO field in the receiving aggregation multi-station CF-Poll frame, and keeps consistent with the AP working under the working channel;
step 3-4, after the access point AP sends the aggregated multi-site CF-Poll frame and the interval short interframe space SIFS, all the sites send the collected data to the access point AP in sequence according to the receiving address RA sequence in the aggregated multi-site CF-Poll frame;
and 3-5, after the AP successfully receives the data of the station, sequentially sending CF-ACK frames for confirmation, and sending a CF-End frame or CF-End and CF-ACK control frames until the CFP period is ended or is ended, so as to End the CFP period.
The multi-antenna multi-channel aggregation multi-site parallel polling method preferably further includes: during the multi-station polling, all the inter-frame intervals are the same, which is SIFS.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the method is particularly suitable for an asymmetric data transmission application scenario that a small amount of instruction data is transmitted in a downlink mode, a large number of uplink stations are provided, and the single acquired data volume is not large when a single-channel aggregation multi-station polling method and multi-antenna multi-channel aggregation multi-station parallel polling are carried out between a multi-radio-frequency multi-channel AP and a single antenna station. The station and the AP are ensured to respond in time to establish a link, and the data transmission is ensured to be efficient, stable and accurate.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a polling method in the prior art;
FIG. 2 is a schematic diagram of the connection between an access point AP and a station in the present invention;
FIG. 3 is a schematic diagram of an AP antenna and its corresponding RF operating frequency point according to the present invention;
FIG. 4 is a schematic diagram of RF operating frequency points and corresponding channel bandwidths in the present invention;
FIG. 5 is a schematic diagram of an aggregated multi-site CF-Poll control frame in the present invention;
FIG. 6 is a diagram of the operation of single antenna multi-channel aggregation multi-site parallel polling in the present invention;
fig. 7 is a schematic diagram of the multi-antenna multi-channel aggregation multi-station parallel polling operation in the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The invention discloses a multi-antenna multi-channel aggregation multi-site parallel polling method, which is specifically described as follows:
the application scene is as follows: as shown in fig. 2, in a wireless communication situation where the AP needs to poll the large-scale distributed acquisition points, the AP is suitable for an asymmetric data transmission situation where the downlink data amount is small, the uplink stations are many, and the data amount is not large.
The AP antenna and its corresponding rf operating frequency points are shown in fig. 3.
Fig. 4 shows the rf working frequency points and the corresponding channel bandwidths. The number of the antennas of the AP is M, the interval between the antennas is larger than lambda/2, wherein lambda is the wavelength corresponding to the working frequency point, and the antennas are independently distributed. N mutually independent orthogonal channels are provided, the orthogonal channels are minimum independent working channels, the bandwidth of each channel can be the same or different, namely dynamic bandwidth allocation can be carried out, and the bandwidth is respectively B 1 ，…，B N . Each channel corresponds to a working frequency point, as shown in fig. 3, the relation between the working frequency point and the channel bandwidth is shown as a formulaWherein, f i For actual operating frequency point values, f 0 To initiate the value of the radio frequency operating frequency point,is the sum of the first i-1 channel bandwidths, B i For each channel bandwidth value, k&And lt, i, and k and i are positive integers.
Wherein, the mapping relation between the number M of antennas and the number N of channels is
1)M>N
A plurality of transmitting antennas can share one channel, and the same signal is transmitted during communication, so that the transmitting diversity effect is realized, and the multiplexing can be expanded.
2)M＝N
One antenna for each channel.
3)M<N
Except that one antenna independently corresponds to one channel, for redundant channels, if the channels are idle channels, channel bundling can be adopted to expand the channel bandwidth of some antennas, and dynamic bandwidth allocation is formed.
The method comprises the steps that the AP and a default channel of a collection station are configured relatively, a signal collection terminal is a single antenna by default, the signal collection terminal has the same working frequency point and bandwidth configuration as the AP, and the signal collection terminal can only work at one sub-channel frequency point in the same time period. I.e. the starting operating frequencies f of the AP and the acquisition terminal 0 And the total channel bandwidth B are known.
During polling, all inter-frame intervals are the same, which is a Short inter-frame space (SIFS).
Aggregated multi-site CF-Poll control frame design
TABLE 1 types and subtypes in frame control
| Type (B) | Type description | Subtype of the form | Subtype description |
| 01 | Controlling | 0011 | Aggregated multisite CF-Poll |
In fig. 5, the aggregated multi-site CF-Poll control frame is designed by setting the type to 01 control with 2 bits and the subtype to 0011 with 4 bits in the MAC header frame control field of the aggregated multi-site CF-Poll frame; in the address field of the MAC header, TA is the MAC address (6 bytes) of the access point AP, RA1, \8230;. Ran is the MAC addresses (respectively 6 bytes) of all sites needing polling in the CFP stage associated with the access point AP, CO is the channel operation field of 2 bytes, and the radio frequency working frequency point mapping (1 byte) and the channel bandwidth mapping (1 byte) are completed; the other fields of the control frame set default reference IEEE 802.11ac. FCS is a frame check bit.
The specific mapping relationship in CO is as follows.
The number of operating frequency points is the same as the number of channels, which as mentioned above is N, each channel having a size B N Total channel bandwidth of. For digital signal processing, the whole channel bandwidth B is divided into 256 portions, each portion having a size of B 0 = B/256 and the starting frequency of the channel bandwidth is f 0 Then the mapping relationship between the actual channel working frequency point and the working frequency point in the CO field is,
f i ＝f 0 +(L+1)B 0 ,0≤L≤255，
wherein f is 0 Is the starting frequency of the channel bandwidth, B 0 Is the minimum fixed bandwidth (actual operating channel bandwidth is not)Is less than B 0 ) And L is the minimum fixed bandwidth number of the interval between the working frequency point of the channel and the initial frequency, and in the CO field, L is converted into an unsigned binary number and is filled into a corresponding working frequency point mapping field.
Working frequency point f 0 After the fixing, the channel bandwidth of the AP polling the station during this CFP needs to be determined,
B i ＝(K+1)B 0 ,0≤K≤255，
wherein K is a working frequency point f 0 As a center, B i The channel contains a minimum fixed bandwidth B 0 In the CO field, K will be converted to an unsigned binary number to fill the corresponding "channel bandwidth map" field.
Single-channel aggregation multi-site polling method
The AP selects 1 or M (M is equal to or less than M) antennas to operate in a channel i (i is equal to or less than N), all stations determine their corresponding communication channels through channel scanning, and the single-channel aggregation multi-station polling method is shown in fig. 6, and specifically includes the following processes:
(1) The AP periodically establishes a CFP through the beacon frame. The length of the CFP is controlled by the AP, with its maximum s duration specified by the cfpmaxduration parameter in the "CF parameter set" of the beacon frame. If the CFP duration is longer than the beacon interval, the AP will transmit a beacon at the appropriate time during the CFP. The actual duration of the CFP is related to the amount of data exchanged during the CFP, but the AP guarantees that this duration is always no greater than CFP daxduration.
(2) The AP sends an aggregate multi-site CF-Poll frame immediately after sending the beacon frame, the specific frame format of which is shown in the figure, and which contains the received MAC address of the associated station that needs to be polled during the CFP.
(3) All stations receive the CF-Poll frame of the aggregation multi-station through channel scanning, check whether the address of the 'RA' field in the frame is the same as the address of the stations, and if the address is different from the address of the stations, properly update the NAV value of the stations according to the 'duration' field value in the frame; if the Channel Operation (CO) field is the same as the working frequency point, the receiving station determines the working frequency point and the channel bandwidth thereof according to the Channel Operation (CO) field and keeps consistent with the AP working under the channel.
(4) After the AP sends the aggregated multi-site CF-Poll frame at an interval of SIFS, the relevant sites send the collected data to the AP in turn according to the RA sequence in the aggregated multi-site CF-Poll.
(5) After the AP successfully receives the DATA of the station, the AP sequentially sends CF-ACK to confirm until the CFP period is ended or is finished, and then sends a CF-End or CF-End + CF-ACK control frame to End the CFP period.
Multi-antenna multi-channel aggregation multi-site parallel polling method
The AP, which has M antennas and N channels, establishes a connection through the mapping rule of the antennas and the channels, so that the multi-antenna multi-channel aggregation multi-station parallel polling method is shown in fig. 7, and the specific process is as follows:
(1) The AP periodically establishes parallel CFPs over beacon frames on N different orthogonal channels.
(2) On any channel, the polling method of the AP in the CFP is performed according to the above-mentioned "single-channel aggregation multi-station polling method".
The concrete embodiment is
Based on IEEE 802.11ac as a communication standard, the emergency communication of the barrier lake is used as an application scene, wherein a relay balloon is used as an access point AP, and a position finder for measuring the water level and the water regime on the surface of the lake is used as a distributed acquisition point and is used as a station object for explanation.
The relay balloon access point AP takes 4 antennae and 4 channels as an example, the total channel is 80MHz, and the initial frequency of the total channel bandwidth is f 0 =5.735GHz, each antenna corresponds to one working channel, the bandwidth of each channel is 20MHz, and the working frequency points are respectively f 1 ＝5.745GHz，f 2 ＝5.755GHz，f 3 =5.765GHz and f 4 ＝5.775GHz。
300 collected work stations are water level gauges and are distributed in each area of the barrier lake.
For example:
the AP antenna 1 works in a channel 1, and the working frequency point is f 1 The number of polling stations is 2；
The AP antenna 2 works in the channel 2, and the working frequency point is f 2 The number of polling stations is 4;
the AP antenna 3 works in a channel 3, and the working frequency point is f 3 The number of polling stations is 6;
the AP antenna 4 works in a channel 4, and the working frequency point is f 4 The number of polling stations is 8;
taking 4 polling work stations corresponding to an antenna 2 and a channel 2 as a specific example, an access point AP regularly establishes a CFP through a beacon frame, and simultaneously the access point AP sends a beacon frame and an aggregated multi-work station CF-Poll frame, for example, the channel 2 correspondingly polls 4 work stations, the CF-Poll frame configures the CF-Poll frame aggregated with the 4 work stations, all 4 work stations perform work channel scanning, receive the aggregated multi-work station CF-Poll frame, each work station respectively checks whether an address field of the work station is consistent with an address field sent by the access point AP, if the address field cannot be matched, the NAV value of the work station is updated according to a "duration" field value therein, if the address field is matched, the receiving work station determines a work frequency point of the work station and a channel bandwidth thereof according to a "Channel Operation (CO)" field therein, and keeps consistent with the AP working channel working in the work channel, and performs data transmission interaction on the 4 work stations, that relevant work stations sequentially send data collected to the AP according to an RA sequence sent by the stations in the aggregated multi-station CF-Poll frame.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. A multi-antenna multi-channel aggregation multi-site parallel polling method is characterized by comprising the following steps:
step 1, an access point AP configures M antennas and N working channels, each antenna utilizes one or more working channels, or a plurality of antennas share one working channel, each working channel corresponds to one working frequency point, J stations with single antenna and multiple channels are configured, the working frequency point and the channel bandwidth configured by each station are the same as those of the access point AP, and the initial working frequency f of the access point AP and the acquisition station 0 And the total channel bandwidth B are known, and M, N and J are positive integers;
the access point AP is provided with M antennas, the interval between the antennas is larger than lambda/2, wherein lambda is the wavelength corresponding to the working frequency point, N mutually independent orthogonal working channels are provided, each working channel carries out dynamic bandwidth allocation and is B 1 ，…，B N (ii) a Each working channel corresponds to a working frequency point, and the relation between the working frequency point and the channel bandwidth is
Wherein f is i For actual operating frequency point values, f 0 To initiate the value of the radio frequency operating frequency point,is the sum of the first i-1 channel bandwidths, B i For each channel bandwidth value, k&I, and k and i are positive integers;
wherein, the mapping relation between the antenna number M and the channel number N is
If M > N
The method has the advantages that a plurality of transmitting antennas share one channel, and the same signal is transmitted during communication, so that the transmitting diversity effect is realized, and the multiplexing can be expanded;
if M = N, namely one antenna corresponds to one channel;
if M < N
Except that one antenna independently corresponds to one channel, if the redundant channels are idle channels, channel bundling is adopted to expand the channel bandwidth of some antennas to form dynamic bandwidth allocation;
step 2, the access point AP establishes a contention free period CFP through a beacon frame regularly, and then sends an aggregation multi-site CF-Poll frame, wherein the aggregation multi-site CF-Poll frame comprises received MAC addresses of all sites needing to be polled in the contention free period CFP;
the design process of the designed aggregation multi-site CF-Poll control frame is that the type of the MAC header frame control field of the aggregation multi-site CF-Poll frame is set to be 01 control with 2 bits, and the subtype is 0011 with 4 bits; in the address field of the MAC header, a target address TA is the MAC address of the access point AP, receiving addresses RA1, \8230, RAn is the MAC addresses of all stations needing polling in a CFP stage associated with the access point AP; CO is a channel operation field and is used for completing radio frequency working frequency point mapping and channel bandwidth mapping; the other fields of the control frame set default reference IEEE 802.11ac;
the step 2 comprises the following steps:
the number of the AP working channels of the access point is N, and the bandwidth of each working channel is B N Total channel bandwidth ofAnd the starting frequency of the channel bandwidth is f 0 Then the mapping relationship between the actual channel working frequency point and the working frequency point in the CO field is
f i ＝f 0 +(L+1)B 0 ,0≤L≤255，
Wherein, f 0 Is the starting frequency of the channel bandwidth, B 0 Is the minimum fixed bandwidth, L is the minimum fixed bandwidth number of the interval between the working frequency point of the channel and the initial frequency, and the decimal L is converted into unsigned binaryAfter the number is made, mapping the work frequency point mapping field of 1 byte corresponding to the CO;
working frequency point f 0 After fixation, determining the channel bandwidth of the access point AP polling station in the contention free period CFP, and then mapping the actual channel bandwidth to the channel bandwidth in the CO field to obtain the channel bandwidth
B i ＝(K+1)B 0 ,0≤K≤255，
Wherein K is a working frequency point f 0 As a center, B i The channel contains a minimum fixed bandwidth B 0 The decimal K is converted into an unsigned binary number and then is mapped into a channel bandwidth mapping field of 1 byte corresponding to CO;
step 3, all stations perform full working channel scanning, receive the aggregated multi-station CF-Poll frame, each station checks whether the MAC address field of each station is consistent with the receiving address field sent by the access point AP, determines the working frequency point and the channel bandwidth of the corresponding station from the aggregated multi-station CF-Poll frame in the state that the address fields are consistent, keeps synchronization with the access point AP of the working frequency point, and sequentially sends the acquired data to the access point AP according to the sequence of the MAC address fields of the polling stations sent by the access point AP until the access point AP acquires the data of all stations;
the step 3 comprises the following steps:
step 3-1, the access point AP transmits beacon frames at different radio frequency points through different antennas to establish CFPs working at different frequency points, the length of the CFPs is controlled by the access point AP, the maximum time length of the CFPs is specified by CFPMaxTransmission parameters in the CF parameter set of the beacon frames, and if the time length of the CFPs is longer than the interval of the beacon frames, the access point AP transmits the beacon frames at a proper time in the CFP period; the access point AP ensures that this duration is always no greater than cfpmaxduration;
step 3-2, after the access point AP finishes sending the beacon frame, it will continue to send an aggregate multi-site CF-Poll frame, which contains the received MAC address of the associated site that needs to be polled during the CFP;
step 3-3, all the stations receive the CF-Poll frame of the aggregated multi-station after scanning through the working channel, check whether the MAC address of the RA field of the receiving address in the CF-Poll frame of the aggregated multi-station is the same as the MAC address of the station, and if the MAC address is different from the MAC address of the station, update the NAV value of the network allocation vector of the station according to the value of the duration field in the station; if the working frequency point is the same as the working frequency point, the receiving station determines the working frequency point and the channel bandwidth thereof according to the channel operation CO field in the receiving aggregation multi-station CF-Poll frame, and keeps consistent with the AP working under the working channel;
step 3-4, after the access point AP sends the aggregated multi-site CF-Poll frame and the interval short interframe space SIFS is finished, all the sites send the collected data to the access point AP in sequence according to the sequence of the receiving addresses RA in the aggregated multi-site CF-Poll frame;
and 3-5, after the AP successfully receives the data of the station, sequentially sending CF-ACK frames for confirmation, and sending a CF-End frame or CF-End and CF-ACK control frames until the CFP period is ended, so as to End the CFP period.
2. The method of claim 1, further comprising: during the process of multi-workstation polling, all the interframe spaces are the same, namely the short interframe space SIFS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053450.1A CN104579616B (en) | 2015-02-02 | 2015-02-02 | A kind of multiple antennas multichannel polymerize multi-site parallel polling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053450.1A CN104579616B (en) | 2015-02-02 | 2015-02-02 | A kind of multiple antennas multichannel polymerize multi-site parallel polling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104579616A CN104579616A (en) | 2015-04-29 |
| CN104579616B true CN104579616B (en) | 2018-03-13 |
Family
ID=53094909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510053450.1A Active CN104579616B (en) | 2015-02-02 | 2015-02-02 | A kind of multiple antennas multichannel polymerize multi-site parallel polling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104579616B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106559904B (en) * | 2015-09-30 | 2021-08-03 | 中兴通讯股份有限公司 | Access method and device of wireless network |
| CN109166296A (en) * | 2018-09-18 | 2019-01-08 | 广东巨细信息科技有限公司 | The more data transmission methods and computer readable storage medium of mobile medical data acquisition equipment |
| CN110381601B (en) * | 2019-07-12 | 2022-12-27 | 腾讯科技（深圳）有限公司 | Communication method, communication device, computer readable medium and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101032094A (en) * | 2004-08-31 | 2007-09-05 | 讯宝科技公司 | Method for establishing high-reliability wireless connectivity to mobile devices using multi channel radios |
| CN102013959A (en) * | 2010-12-01 | 2011-04-13 | 北京新岸线无线技术有限公司 | Communication method and wireless communication system for realizing multi-user dispatching |
| WO2012002705A2 (en) * | 2010-06-29 | 2012-01-05 | Lg Electronics Inc. | Method and apparatus for transmitting data frame in wlan system |
| CN103457990A (en) * | 2013-05-28 | 2013-12-18 | 大连理工大学 | Wireless data collecting method based on dynamic time slot allocation |
| CN104270822A (en) * | 2009-12-28 | 2015-01-07 | 英特尔公司 | Efficient Uplink Sdma Operation |
-
2015
- 2015-02-02 CN CN201510053450.1A patent/CN104579616B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101032094A (en) * | 2004-08-31 | 2007-09-05 | 讯宝科技公司 | Method for establishing high-reliability wireless connectivity to mobile devices using multi channel radios |
| CN104270822A (en) * | 2009-12-28 | 2015-01-07 | 英特尔公司 | Efficient Uplink Sdma Operation |
| WO2012002705A2 (en) * | 2010-06-29 | 2012-01-05 | Lg Electronics Inc. | Method and apparatus for transmitting data frame in wlan system |
| CN102013959A (en) * | 2010-12-01 | 2011-04-13 | 北京新岸线无线技术有限公司 | Communication method and wireless communication system for realizing multi-user dispatching |
| CN103457990A (en) * | 2013-05-28 | 2013-12-18 | 大连理工大学 | Wireless data collecting method based on dynamic time slot allocation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104579616A (en) | 2015-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10986512B2 (en) | Method and apparatus for associating between a station and an access point in a wireless communication system | |
| TWI758631B (en) | Spatial reuse method for wireless communication at access point | |
| US20190357205A1 (en) | Terminal, network device, and communication method | |
| EP3167681B1 (en) | Method to improve channel access opportunity in a wireless communications system | |
| US9451538B2 (en) | Method and apparatus for active scanning in wireless LAN | |
| US20130182652A1 (en) | Methods and apparatus in a wireless network | |
| US10524288B2 (en) | Method and apparatus for increasing transmission coverage of STA performing initial access in wireless LAN | |
| MX2007002810A (en) | Measurement support for a smart antenna in a wireless communication system. | |
| US20160007274A1 (en) | Scanning method and apparatus | |
| US20140153505A1 (en) | Methods and Apparatus for Generating a Control Message Frame | |
| CN114902590B (en) | Method and apparatus for multi-link Block Acknowledgement (BA) | |
| US10038543B2 (en) | Many to one communications protocol | |
| CN116318597A (en) | Frame transmission method and device | |
| US20220217791A1 (en) | Wireless communication method using txop and wireless communication terminal using same | |
| US20220295339A1 (en) | Techniques for controlling a network | |
| CN104579616B (en) | A kind of multiple antennas multichannel polymerize multi-site parallel polling method | |
| US20190158321A1 (en) | Training Packet Sending Method and Apparatus | |
| CN109819519B (en) | Data transmission method and device | |
| CN109804571B (en) | Communication apparatus and communication method | |
| CN116530206A (en) | Multilink measurement reporting | |
| WO2020121028A1 (en) | Selective transmission and/or detection of identification signals by a wireless access node in unlicensed spectrum | |
| US9432921B2 (en) | Method and device for performing active scanning | |
| CN110913480B (en) | Communication method and related device | |
| WO2023029009A1 (en) | Transmission method and apparatus | |
| CN118044279A (en) | Method and apparatus for transmitting synchronization information for NSTR operation in a communication system supporting multiple links |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |