TWM289566U - Implementing a smart antenna in a wireless local area network - Google Patents

Description

M289566 IX. Creation Description: This case relates to wireless local area network (WLANs) and, in particular, to a method and device for implementing a smart antenna in a WLAN to support A smart antenna is used in a WLAN, and smart antenna performance information is transmitted between stations in a WLAN (hereinafter referred to as STAs). Prior Art In a WLAN operating in an infrastructure mode, a STA typically performs a scan to evaluate which access point (AP) is the best candidate to provide its services. The scan performed by the STA may be passive or active. In the passive field, the STA will listen to the beacon frames sent by the APs, while in the active scan mode, the STA will send out the probe request, then The APs react by sending a probe response to the sta. To enhance coverage and increase throughput, APs can be equipped with advanced antenna structures so that they can change the type of radiation (beam) they use. As used herein, the term "intelligent antenna" means a set of N antennas having different radiation patterns, and typically will point to the selected mode (or, in the case of an omnidirectional antenna, Not pointing to the direction of any feature), where the transmitter level/or receiver of a node (AP or STA) will choose to make the appropriate antenna (or "beam") to communicate with its counterpart, The most suitable antenna M289566 will typically be the one in the dedicated connection where one node will transmit a packet to another special node, with the highest signal to interference and noise ratio at the receiving node (signal- To-interference_plus-noise ratio, SINR). The increase in coverage is a function of the location at which the AP sends out the sta of the packet, and/or the location of the time-varying channel. Because the beacon frame sent by an AP does not target a particular STA' and there are a lot of STAs in the cat, they tend to transmit evenly across all directions (ie, utilize An omnidirectional beam), and similarly, because it requires an AP to listen to packets from all its associated STAs, the AP system typically uses an omnidirectional wave to listen to the channel, but This type of beam must also allow the .AP to determine which beam is the best beam to serve a STA, even after it has received a probe request from the STA, and therefore should also An omnidirectional beam is transmitted. heart

In addition to using a beacon (passive broom) for evaluation (a passive scan), a STA can also be evaluated by using the wirelessly-connected product f j J (). Typically, the beacon is compared to (by: a brief description of the APs, based on the above reasons, using a omnidirectionality = response to the situation, and the situation is such that the -STA system can be shipped, The beacon and/or probe responds to the perceived received signal product based on its self-described

In fact, this hypothetical AP will be evaluated as being worse than another AP that is used to transmit the traffic frames that can be utilized and transmitted in the AF, directional beam and M289566. The best candidate. Figure 1 shows an exemplary WLAN 100 comprising a STA 102 and two APs, AP-A 110 and AP B 120. The AP-A 110 system can utilize an omnidirectional beam 112 and a plurality of directional beams 114, 116, 118. The AP-A 120 can utilize an omnidirectional beam 122 and a plurality of directional beams 124, 126, 128. . The STA 102 will measure the #received power of the various beams shown in Table 1. Table 1 Received signal power signal measured at STA 102 Source beam label beam pattern Received power at STA 102 AP-A 112 Omnidirectionality - 75 dBm AP - A 116 Directionality - 85 dBm AP^A 118 Directionality -85 dBm AP_B 122 omnidirectionality - 80 dBm AP_B 124 directionality - 70 dBm is received from APJB 120 by omnidirectional beam 122, which can be received from ap_a 110 by omnidirectional beam 112 Strong beacons, and/or probe responses, however, AP-B 120 is a better candidate for transmitting traffic frames than ap-an〇 because Ap b 12〇M289566 is used in one Its advanced antenna structure focuses energy on the preferred location of the " 102 (via directional beam 124). In a ΑΡ-based WLAN, multiple STAs can be associated with a set AP at a set time. If the multiple access meter is a carrier sense multiple access/collision avoidance (CSMA/CA), for example, 802s based on 802.11, any STA is easy. A packet is transmitted (also referred to as a "frame,") at any given time to appeal to its associated AP, where the AP will be after the packet has been completely received and decoded. Determining which one of the STAs associated with the packet is transmitted based on the source address of the medium access control (hereinafter referred to as MAC) header of the packet, And the AP must complete the entire packet reception before making the source decision, because the error detection bit covering both the mac header and the MAC payload is in the packet. The end is received. In a mesh architecture, STAs (or "mesh nodes" can also be equipped with smart antennas to improve the SNR of the received signal, For the other purpose of reducing interference, for example. The multiple access in the 802.11-based WLANs is such that when there is more than one STA associated with the AP, the selection at the AP is most appropriate. The beam used to receive the packet is difficult to generate, and this is because the STAs can be located anywhere around the AP, and because of the M289566, for each STA, in general, the most suitable beam is Not the same 'again, because the essence of the STA is in Mu, & , the handle is completely unknown in the complete reception, therefore, the AP does not, use this information to decide which antenna to choose to receive Packets. The same problem can also occur in a network structure in which a node can be connected to more than one mesh node. In order to prevent this from happening, there are several generations of solutions, but they also have Disadvantages. # υ The AP system can limit itself to the use of an omnidirectional type to receive all packets, but it also loses the potential for using a smart antenna. 曰' 2) The Α The lanthanide system can use signals from multiple beams simultaneously, ‘and then combine them or select the best beam among them. However, this solution increases the complexity of the receiver because the signal from multiple beams must be demodulated. 3) The tether can switch between the available beams in a continuous manner after receiving the inverted packet, picking the beam that causes the best signal quality, and then switching to the beam for use in The remaining duration of receipt of the packet. However, this method has the disadvantage that the cymbal is at the same time as it is trying to apply a special packet beam, while it is risking that some bits will be incorrectly received, thus causing the packet. Lost.

4) the system may attempt to decode the sender's MAC address (included in the MAC M289566 header of the packet) using an omnidirectional antenna, and then the MAC label The beam identified in the header that is most suitable for the STA is used for the remainder of the packet. However, this method has the problem that the MAC header is transmitted at the same rate as the rest of the packet. Therefore, if the omnidirectional antenna cannot provide sufficient signal for the mac payload. When the quality provides sufficient gain, it is unlikely that the MAC header will decode correctly, but in the opposite case (if the omnidirectional antenna does provide sufficient gain), then the There is no need to use a smart antenna. 5) The STAs may be forced to send each packet using a Request_to-Send/Clear-to_Send' RTS/CTS procedure, which will cause the AP to be in the data. The transmitted STA is recognized before the packet arrives. However, this will cost the important loss of the transmission due to the redundant operation of the rts and CYS packets, thus partially defeating the purpose of using the smart antenna. 6) The AP system can poll the STAs in turn using different beams. However, this method has two problems. First, it is in a system that calls for bursty traffic, for example, WLAN, when trying to predict the time spent on each beam. Difficulties arise. Second, when considering the necessary overlap between the antenna type and the irregularity of the wireless environment, for example, shadowing, it is necessary to avoid STAs being suboptimal for using a pair of them. It is difficult to react to a poll sent by a (but audible) beam. In a WLAN, the smart antenna performance system can exist in Ap, STA, or both, and the AP does not know how to coordinate it and the first one without the exchange of antenna performance information. The smart antenna feature of stA and vice versa. The potential adverse effects on a WLAN due to the unswapped smart antenna information performance are illustrated in the following examples. Suppose that both an AP and a STA use switched-beam smart antennas, but the smart antenna performance at each end (for example, the number of beam patterns available and required for scanning, and the test site) If the time required for each of the available beams is still unknown to the other end, then the AP or the STA does not know the smart antenna performance of the receiving end, so Each will have to: (1) guess the smart antenna performance on the other end, or (2) test it if it does not know that the receiver may use its own beam search at the same time Transmit antenna beam. If the smart antenna performances at the rain end are known to each other, then the two devices can follow simple, pre-agreed rules to avoid service degradation caused by beam search on the rain side at the same time. For example, if the "beam search time" (Tsearch) is known to the AP and the STA, then a simple and useful rule may be that the attempt is given (the transmission has begun) When the other end is sufficient time to direct the beam search it has, the first time after the association is received, the package ί (the AP or the STA) should be the wave that it has at the beginning of it. Before calling Cambodia, I waited for the duration of Tsearch. Current antenna technology enhances reception by using receive and/or transmit density, which can be achieved by obtaining any gain longer than 13 M289566 or providing less gain than other methods. In addition, the current antenna technology often needs to use proprietary information (custom messages) to know the antenna performance of a STA, and in the absence of this information, the APs and STAs cannot be utilized. Antenna performance to increase data rate, or range. In order to enable the smart antenna feature to operate more efficiently, information about the performance of the STA and the AP should be exchanged as described above. Furthermore, the exchange of antenna information also enables optimization during the smart antenna feature. It is possible to coordinate, for example, beam selection, beam scanning, beamforming, multiple input multiple output (hereinafter referred to as ΜΙΜΟ), and making it possible to change the beam pattern and/or antenna gain. Any other performance. A new method for implementing a smart antenna when establishing an association between a STA and an AP in a WLAN is that the modified AP transmits a beacon frame on an antenna beam. And the beacon frame is received at the STA, and the STA measures a signal quality of the beacon frame, and then the AP switches to a different antenna beam, and Repeating the method until the beacon frame has completed transmission on all of the antenna beams, and then the STA transmits the beacon frame with the highest signal quality on one of its antenna beams The AP generates an association. A similar method can also be used to send a probe to request 14 M289566 to find the frame into the STA of the AP, and the AP is then used for profit propagation on multiple antenna beams. The needle responds to the frame as a response. The system for implementing a smart antenna when the association is established in one of the STAs of the 〆 WLAN and the 七 七 AP AP includes: a beacon frame from the STA sent by the STA, wherein the beacon The frame will be used to identify the intercept of the total number of antenna beams that will be transmitted to identify the intercept of the beam on which the transmission is currently being transmitted. Another system for implementing a smart antenna when the AP is associated with one of the STAs and the 〆a ^ 鲁 in a WLAN includes: a probe request frame sent from the STA to the Ap, and a a probe response frame sent from the AP to the STA, wherein the probe request frame may include an indication of whether the STA is to scan multiple antenna beams from the AP, and The probe response frame may include a field for identifying the total number of antenna beams to be transmitted, and an intercept for identifying the beam currently being transmitted. A method for supporting the use of a smart antenna in a WLAN including an AP and a STA, initially, the AP selecting an _ antenna beam for communicating with the STA, and then, The selected beam burst will be sent from the AP to the STA, and a packet will be transmitted from the STA to the Ap, and the selected beam will be included in the packet. Information whereby the Ap system uses the selected beam to receive at least a portion of the packet. A system for supporting the use of a smart antenna in a WLAN comprising an AP and a STA, comprising a first packet and a 15th M289566 2 packet. The first packet is sent from the AP to the STA, and includes a selected beam indicator, a MAC address of the AP, and a MAC address of the STA, where the Selecting a beam indicator identifies an antenna beam selected by the AP for communicating with the STA. The second packet is sent from the STA to the AP and includes the selected beam indicator, whereby the AP is <receives by the selected beam At least a portion of the second packet 0 _ a system for exchanging smart antenna performance messages between a transmitting STA and a receiving S TA in a wireless communication system, including an antenna performance information unit (information) Element, IE), and the antenna enable IE is sent from the transmitting STA to the receiving STA before the data transmission between the transmitting STA and the receiving STA, and when used in a WLAN In the meantime, the antenna performance IE can be transmitted as part of a management frame. A method for exchanging smart antenna performance information between a transmitting STA and a receiving STA in a wireless communication system includes the following: transmitting antenna performance information from the transmitting STA to the receiving STA, determining Whether the receiving STA can support the antenna capability of the transmitting STA, if the receiving STA can support the trunking performance of the transmitting STA, adjust the setting at the receiving STA, and if When the receiving STA can support the antenna performance of the transmitting STA, the data is transmitted from the transmitting STA to the receiving STA by using the antenna performance. 289M289566. A smart antenna feature is used in a WLAN. The system includes an AP and a STA. The AP system includes a first antenna performance determining device, a first antenna performance information device connected to the first antenna performance determining device, and the first antenna performance determining device is constructed to borrow Determining the antenna performance of the AP by checking information stored in the first antenna performance information device; connecting to a first transmitter/receiver of the first antenna performance determining device, connecting a first antenna to the transmission filter/receiver; and a beam switching device connected to the transmitter/receiver of the I, and the beam switching device is configured to switch the beam of the first antenna . The SAT system includes a second antenna, a second transmitter/receiver connected to the second antenna, and the second transmitter/connector is configured to receive the antenna Stomach communication; a second antenna performance determining device connected to the ^:transmitter/receiver Λ Γ ^ + 窄 置 〆 〆 〆 天线 天线 〆 〆 〆 〆 〆 〆 〆 〆 Constructing to perform the antenna performance of the antennas received from the second antenna and the antennas that are to be taken from the second transmitter/receiver, the second day Line efficiency = the second line of performance determining device m line b匕; and the speed shirt seems to shout b is constructed to set the rhyme device to the smart antenna performance.所述 The above-mentioned STAs of the STA, the (STA) system includes the word "station" (st-η), then the name "the idler device, / "confirm" "special transmission / reception The unit, one that does not I1, has a 17 M289566 or mobile subscriber unit, a - squeak, or any other form of device that can operate in a wireless environment. As mentioned later, the term "access point", (AP) includes, but is not limited to, a base station, a node location controller, or any other form in a wireless environment. Interface device. This case will solve the problem of beam selection in passive scanning H active scanning cats, and this case is also related to a method that can be implemented in -AP and 〆STA and signal transmission, so that It is possible to use the _ smart antenna to receive packets from the STAs. The method of the user can also be implemented in the mesh node in the network structure. In addition, the case will be addressed to an AP and STA. The exchange of antenna performance information is based on the current information provided by the 802.11 standard, and the backward compatibility of the system. Passive scanning seedlings provide signal transmission and support for an AP. To transmit its beacon on multiple beams, and this can be achieved by adding two fields to the Lu WLAN beacon management frame, as shown in Figure 2, The official affiliation is referred to as an Advanced Antenna (AA) beacon frame 200. Many of the fields of the frame 200 are the same as the existing barriers defined by the 802.11 standard, and these fields are Then, the frame control 202, the duration 204, the destination address (DA) 206, the source address (SA) 208, the basic service set (BSS) identification (BSSID) 210, Sequence control 212, timestamp 214, beacon M289566 beacon interval 216, performance information 218, SSID information element (IE) 220 'supported rates IE 222 'jump Frequency hop (FH)/distribution system (DS) parameter set IE 224, contention free (CF) parameter set IE, 226, independent BSS (IBSS) parameter set IE 228' and a traffic indication map (TIM) IE 230. The first new field 232 of the frame 200 is indicative of the Lu STA, the beacon frame is in an AA letter The range of the spacing is sent n times, where N is the number of beams on which the AP will transmit the beacon, and the second new field 234 is in the identification has been used Transmitting a beam of the beacon, that is, a beam identifier, and therefore, when receiving any one of a plurality of AA beacon frames transmitted by an AP, the STA is capable of being recognized to be included in the The number of beams in the beam scan performed by ap, and it is also possible to identify different versions by looking at the beam identifier (234). ® It should be noted that the AA beacon spacing 216 can be set to the same or different value than the non-AA spacing, and in order for the system to provide user service, the AA beacon spacing It must be greater than the duration of the beam scan, so there is time left to transmit the traffic frame. This can be enforced as, for example, constructing management rules to prevent a user from constructing the AP in a manner that the beacon scan occupies most of the AA beacon spacing time. 19 M289566 In a preferred embodiment, the N aa beacon frames 200 are continuously transmitted on the day-to-day basis. This is because the user can use the DIFS (Distributed Inter-Frame Space) to be short when trying to access the wireless medium in the transmission between the two beacon frames. However, it is achieved by a large delay (X) compared to SIFS (Short Inter-Frame Space). Here, it should be noted that the AP still needs to wait for a complete DIFS when accessing the wireless medium for transmitting the first one of the N letter frames, and this is Setting an upper limit to a maximum value of the time required for the STA to scan the media when the STA has detected one of the N beacon frames notified by an AP, thereby: (N - 1 ) X (beacon duration + X) Equation 1 In other words, this avoids a STA in the case where it has not been known whether the AP has transmitted all of the N beacons, and has not decided; Between days and days • Come and scan the channel. The timing diagram of the passive scan is shown in FIG. Before the AP starts the AA beacon interval 3〇〇, it waits for a DIFS 302, and then, after the AA beacon interval is 3〇〇, the AP system transmits the first The beacon frame 304, and between the beacon frames; 3〇4, the AP will wait for the spacing χ ( 306), wherein it is shorter than the difs, and is larger than the SIFS . M289566 A method for transmitting an aa beacon frame in a passive scan. The 400 series is shown in Figure 4. At the beginning of the method 40, the v AP transmits an AA beacon frame 200 on one of the N antenna beams, and the current beam identifier 234 is set to the current beam ( Step 402), then, according to whether the AA beacon frame has been transmitted on all N beams (step 404), wherein if the AA beacon frame has been transmitted on all N beams Then, the method is finalized (step 406), and if the AA beacon frame has not been transmitted on the N beams of φ (step 404), the method waits for the spacing X (step 408). And then the antenna system switches to the next beam (step 408) and transmits the AA beacon frame 200 on the current beam, and the current beam identifier 234 is set to the current beam (Step 410), then the method continues with step 404. Here, it is to be noted that the step of switching to the next beam (step 408) may be performed before or after waiting for the interval X. Whether the STA is associated with the decision used by the AP has a specific appeal, wherein one method is to select the AP to be associated using the power level or SNR perceived on the beacon. In addition, the present case allows a STA to fully utilize the fact that the AP is already equipped with an advanced antenna system while using this method. The active scan also addresses the active scan by allowing a STA to request the AP to send a probe response on multiple beams, while this can be done by adding a new field to the WLAN probe request. The frame is achieved, and the resulting frame of 21 M289566 is shown in Figure 5, and is referred to as an AA probe request = 500. The plurality of blocks of the frame 5〇〇 are like the existing probe request frames defined by the 8〇211 standard, and the fields are including the control 502, the duration 504, the DA 506, the SA 508, BSSID 510, sequence control 512 'SSID IE 514, and support rate IE 516, and the new field of the frame 5 是 is an indication that all the beams of the AP are to be scanned by the STA (A value of YES or NO) is provided to the AP 〇I. In addition, 'two new splicing systems are added to the WLAN probe response frame, and the resulting frame is shown in Figure 6. And, is referred to as an AA probe response frame 6〇〇, and many of the blocks of the frame 6〇〇 are the same as the existing probe request frame defined by the 802.11 standard, wherein the frame The interception 6〇2-628 of 600 is the same as the interception 2〇2_228 of the frame 2〇〇. The first new interception of the frame 600 is to indicate the STA, the AA probe. The response is sent N times in the range of the AA beacon interval, where n is corresponding to the AP on which the probe will be sent back. The number of beams, and the second new block 632 is to identify the beam that has been used to transmit the AA probe response, that is, the beam identifier, and an AP equipped with an AA system. The AA probe request is responded to by sending a plurality of (N) AA probe responses to the STA. In a preferred embodiment, the N AA probe responses are transmitted continuously in time. This can be achieved by having the Ap be used to access the wireless medium between the transmissions of the two AA probes, using a delay (X) that is shorter than the SIFFS and shorter than the SIFS. . Here, it should be noted that when the AP accesses the wireless medium for transmitting the first one of the N probe responses, it still needs to wait for a DIIF, and this is Is an upper limit set to the maximum value of the time to wait for the n probe responses sent by an AP after receiving the AP, thereby: upper limit = (N - 1) X (probe response duration + X) The timing diagram of the active scan described in Equation 2 is shown in Figure 7. After the STA sends the AA probe request frame 7〇〇, the AP waits for a DIFS 702 before transmitting the first probe request frame 704, and then between the probe request frame 704 The AP waits for the inter-distance X (7〇6), where X is shorter than the difs but larger than the SIFS. One is used to transmit an AA in an active scan. The $800 method of the probe response frame is shown in Figure 8. At the beginning of the method 800, the STA sends an AA probe request frame 500, including setting the indicator 518 to scan all beams of the ap (step 802), and then, the AP Receiving the AA probe request frame and waiting for the mFs period (step 804), and then the AP transmits an AA probe response frame 600 on one of the antenna beams, and The current beam identifier 632 is set to the current beam (step 8〇6), and further, according to whether the AA probe response frame has been transmitted on all the beams, 23 M289566 is transmitted. Deciding (step 808), wherein if the AA probe response 'frame has been transmitted on all N beams, then the method terminates (step 810), and if the AA probe response frame is not yet at all When transmitting on the N beams (step 808), the method will wait for the spacing X (step 812), then the antenna system will switch to the next beam (step 812) and on the current beam. Transmitting the AA probe response frame 600, and the current beam identifier 632 It is set as the beam current (step 814), then the method 808 the next steps. Here, it is to be noted that the step of switching to the next beam (step 812) can be performed before or after the interval X to be used. In a prior art system, the decision made by a STA as to which AP is to be associated does not take into account the wireless link gain obtained by the advanced antenna structure at the AP, which means that In the RF environment in which the beacon frame and the probe response are transmitted by the APs in an omnidirectional manner, by scanning, whether passive or active, the collected data can be Linking a STA to an AP that would provide worse performance than another AP has taken into account the gains obtained from the AA system. In the present case, in consideration of the gain that the AA system will provide when transmitting the traffic frame, when the RF environment is scanned, the data collected by a STA enables which AP to be It is possible to provide an assessment of the best wireless links. Beam Indicator 24 M289566 Figure 9 is a diagram of one of the systems 9 依照 operating in accordance with the present case. The system 900 includes a first 902, a first STa (STA1) 904, and a second STA (STA 2) 906, wherein the AP 902 is in an omnidirectional beam (or mode, b〇) Transmitting on 91〇, transmitting with the sta 1 904 on a directional beam (bl) 912, and starting with the STA2 906 on a second directional beam (b2) 914 The transmission is performed, and while the omnidirectional beam 91 is capable of being received by STA 1 904 and STA 2 906 (although weakly), the directional beam 912, 914 is a preferred choice. A new field, referred to herein as a "beam indicator," is added after the Physical Layer Convergence Protocol (plcp) header sent from a STA to most of the AP's packets. For indicating which of the beams (or antennas) the AP should select, and then receiving the remaining portion of the packet (MAC protocol data unit (PDU)), where Note that the beam indicator does not need to be sent from the STA to the AP along with all the packets, because some packets (eg, an acknowledgment (ACK) or a CTS) are expected Receiving from a special STA by the AP, if the AP knows in advance which STA will send the next packet, it can select the best beam for receiving the packet. Moreover, the beam indicator is not necessary, but the beam indicator can also be transmitted among the packets.

Figure 10 is a diagram of a frame format 1000 including the beam indicator information transmitted by a STA. The frame 1000 is a PLCPPDU 25 M289566

A modified version of (PPDU), and includes a PLCP preamble 1002, a PLCP & head 1004 'one beam indicator shelf 1006, and a MAC frame 1〇08 °. This information is borrowed. The packet 1 〇〇〇' transmitted by the STA is provided at a minimum data rate. The AP system will use its omnidirectional antenna to decode the PLCP header 1004 and the beam indicator field 1006, and after decoding the beam indicator block 1〇〇6, the AP system The corresponding beam may be selected to receive the remainder of the packet 1008 without the need to know the identity of the spring STA transmitting the packet 1000. The beam indicator 1 〇(10) is an integer between 〇 and Namax, where Namax is the maximum number of beams that the AP can use, and the value of Namax can be compatible with the All devices of the system are fixed, or are signaled by the AP in a beacon frame, in a probe response frame, or in other management frames. Preferably, Namax is a relative a smaller integer (ie, 7 or 15) to limit the number of extra bits required to invoke the beam indicator field 1〇〇6, and one of the values is preferred. Predetermined as a default value when the STA does not know what value to use in the beam indicator block 1006, and when using the preset value, the Ap can be simple The use of a beam that is not privately directed in a particular direction (eg, an omnidirectional pattern). The STA determines which value to use in the beam indicator M289566: illuminating 1006 based on the poor information provided by the AP before the AP to STA signal is transmitted. The information required for the transmission of this signal consists of the beam and the discrepancies and the AP and STA MAC addresses, optionally, - "age limit", "system", and force Instructing the STA to be at a maximum time other than the beam indicator information is considered to be innocent or invalid, and the age limit may be a fixed value, or may be from a beacon, The needle responds to the frame, or the signalling of other management buildings, and in the case of the case, the age limit can be set by the AP and based on the Lukeley of the STA mobility. The AP transmits the beam indicator information to the STA with the possibility of several nickname transmissions, and one of the methods is that the Ap will only transmit the destination (AP and STA addressing, beam) Indicator, optional age limit) A special packet of information required (a beam refers to a poor message). Figure 11 is a diagram of a beam indicator information 1100 sent by an Ap, wherein Information 1100 Series Including a beam indicator block 1102, an AP address block Π04, a STA address field 1106, and a selectable age limit field 11〇8, where the field is 11〇2 The sequence of 1108 is used as an example, that is, the fields 1102-H08 of the information 1100 may be in any order. In the case of a unicast, preferably The STA sends an ACK back. Therefore, if the STA does not continuously receive the packet, the AP may retransmit the packet 1100. In addition, if the AP has to use several STAs. When the beam indicator 27 M289566 is updated, it can send a multicast message containing the respective beam indicator values of the STAs to them. Another possibility for the AP to send a signal Then inserting or carrying the required information onto a packet containing other data specifying the STA, and the information may be added after the PLCP header, after the MAC PDU Or in the MAC header Another field, brother 12a and 12b, is a diagram of a frame format 1200, 1220 containing the beam indicator information sent by an AP, and the frame 12 〇 0, 122 吁 is said to be A modified version of the PPDU is shown. Lu 12a shows a frame 1200 that adds the beam indicator information to the PLCP header. The frame 1200 includes a PLCP preamble 1202, a PLCP header 1204, and a Beam indicator field 12〇6, an AP address field 1208, a STA address block 1210, a selectable age limit field 1212, and a MAC frame 1214. Figure 12b is a display showing a frame 1220 after the beam indicator information is added after the MAC frame 1214, and the block 1220 is in the same position as the field of the frame 1200, wherein The only difference is the order of the lugs. Another possibility to transmit a signal is to add a flag indicating whether the beam indicator information exists, and the flag is such that the AP may not need to be in every packet facing the STA. Transmitting the beam indicator information, that is, the beam indicator information may be periodically (for example, every five seconds), and/or driven by events as the basis of 28 M289566 (for example, The transmission is performed at a change in the beam transmitted to the STA at the AP as a basis. 13a and 13b are diagrams of alternate frame formats 13〇〇, 1320, including the beam indicator information transmitted by the AP, and incorporating the beam indicator information flag, and the Frames 1300, 1320 are modified versions of the PPDU. Figure 13a shows a frame 1300 comprising a PLCP preamble 1302, a PLCP header 1304, a beam indicator information flag 1306, a beam indicator block 1308, an ap address block 隹 1310, a STA bit. An address block Π12, a selectable age limit field 肇 1314, and a MAC frame 1316, wherein the flag 13 〇 6 is only provided if the beam indicator information (fields 1308 - 1314) is provided The setting is made only when the tilt is 1300. Figure 13b is a frame 1320 showing that the beam indicator information is added after the MAC frame 1316, and the block 1320 is the same as the field of the frame 1300, wherein The difference is only in the order of the blocks. φ the STA will fill in the beam indicator field 1006 in the STA-to-AP transmission (packet 100〇) ® with the latest beam indicator sent by the AP for the STA (1102, 1206, 1308), and this is when the latest signal transmission has been received before the age limit period, otherwise the STA will fill the beam indicator field 1006 with the pre- The value, as described above, further, for each value of the beam indicator, the AP will know which of its beams (or antennas) 29 M289566 corresponds to the indicator, and The STA does not need x to know this correspondence. > Figure I4 is a flow diagram of a method 1400 for transmitting smart antenna information by an AP and a STA. At the beginning of the method 1400, the AP system selects a beam for communicating with the STA, and selects a beam indicator corresponding to the selected beam (step 1402), where Mandatory, but more intimately, the AP selects a beam that maximizes the signal level at its receiver or the signal-to-interference ratio (SIR) The AP can learn which beam will maximize the SIR for a particular STA by a variety of methods. For example, the AP may try different beams when receiving a packet expected from a particular STA, and may select a beam that is the best quality of the received signal, and is expected An example of a packet is an ACK followed by a transmission of a data packet to a special STA, and a CTS packet immediately following the transmission of an RTS packet to a special STA. The expected packet 'the STA does not have to add the beam indicator field after the PLCP header 1004 because the AP expects the packet to be sent by a certain STA, and thus The AP will already know which beam to use. Next, the AP sends the beam indicator information to the STA (step 1404), wherein the beam indicator information (as explained more clearly above) includes the beam indicator, the AP Address, M289566, the address of the STA, and an optional age limit as the end of the beam indicator information. In addition, the method 14 is based on the assumption that the age limit appears in the Among the beam indicator information. Then, a determination is made as to whether the beam indicator information has been reached, that is, whether the beam indicator information is still valid (step 1046), if the age limit has not been reached, then the STA Arranging to transmit the beam indicator of a packet to the selected beam (step 1048), and then the STA transmits the beam indicator information on the selected reference beam Packet (step 1410) 'The AP begins receiving the packet from the STA on the omnidirectional beam (step 1412), and then the AP decodes the location included in the packet The beam indicator information is described and the antenna is switched to the selected beam to receive the remainder of the packet (Step 1414) 'Next' the method terminates (step 1416). If the age limit of the beam indicator information has been reached, that is, when the beam indicator information is no longer valid (step 1406), the STA is set to the beam indication of a packet. The symbol will be transmitted to the omnidirectional beam (or type, step 1420), and then the STA will send the packet on the omnidirectional beam (step H22) 'the AP will be in the The packet is received on the omnidirectional beam (Leo Lin 1424), and then the method terminates (step 1416). Here, because the packet is transmitted on the omnidirectional beam (since the packet from the STA does not include the beam indicator information, or the 31 M289566 STA has already described The beam indicator is set to the preset value), and therefore, the AP does not need to change its antenna beam. Figure 15 shows an example of the method 1400. In this example, it is assumed that the AP 1500 has decided that the best beam systems to communicate with STA 1 1502 and STA 2 1504 are bl and b2, respectively (as shown in Figure 9). Figure 15 shows a possible sequence of events in which STA 1 1502, STA 2 1504, and the AP 1500 are in communication with each other. First, the AP intends to transmit a packet to the STA 1 ' and after obtaining access to the medium (step 1510), the AP switches to the beam bl (step 1512) and transmits a profile to the STA 1 'Includes a beam indicator information, ϋ accompanied by the beam indicator (bl) and the age limit using the beam indicator (five seconds, step 1514) 'setter' STA 1 sends an ACK to the Ap (step 1516), and from this time (and to five seconds from this time), STA 1 knows that if it has to transmit a packet to the AP' it should be said to be the beam The indicator block _ (1006) is set to bl (step 1518), and after receiving the ACK from STA 1, the AP switches its antenna to an omnidirectional pattern (b0 'step 1520). Next, the AP again obtains access to the media (step 1522) and switches to beam b2 (step 1524) to transmit a packet to STA 2, including a beam indicator information, accompanied by The beam indicator (b2) and an age limit using the beam indicator (five seconds, step 1526), then STA2 will send an ACK to the AP (step M289566 step 1528), and STA 2 It is known that in order to transmit any packet (except an ACK, or a CTS) to the Ap, the beam indicator field (1006) should be said to be within five seconds from this time. ) is set to b2 (step 1530), and then, after receiving the ACK from STA2, the AP switches its antenna to an omnidirectional pattern (b〇, step 1532). Next, STA 1 obtains access to the media (step 1534) and transmits a data packet to the AP' and the beam indicator field _ (1006) is set to bl (assuming an lapse The time is less than five seconds, step 1536), and further, after decoding the beam indicator block, the AP immediately switches to beam Μ (step 1538) to decode the remainder of the packet (steps) 1540), and after the packet reception is terminated, the UI sends an ACK to STA 1 (step 1542) and switches its antenna to the omnidirectional pattern (b0, step 1544). STA 2 then gains access to the media (step 1546)' and transmits a data packet to the AP, and the beam indicator blocker (1006) is set to b2 (assuming an lapse The time is less than five seconds, step 1548), and further, after decoding the beam indicator block, the AP will immediately switch to beam b2 (step 1550) to decode the remainder of the packet (step 1552) And after the packet reception is terminated, the AP sends an ACK to sta 1 (step 554), and switches its squall to the omnidirectional pattern (b〇, step 1556) .

It should be noted that if the age limit of the beam indicator information has expired (in this example, five seconds), then one STA 33 M289566 • (STA1, or STA2) will The beam indicator block (1006) is set to b (the preset value). "/The main 1 case is such that the smart antenna can be utilized at the AP without any significant inconvenience, and the addition of the beam indicator field in the PLCP header will not result in Excessive redundancy, because the number of possible beams is usually limited to eight, or more (for example, three or four bits for the beam indicator field) For backward compatibility purposes, an interception of the PLCP header can be assigned a new value 'for the Lu packets of the STAs transmitted from the application, so the AP can decide Whether an incoming packet has been transmitted from a STA implementing the present case, for example, in the "service" field of the PLCP header, one of the currently reserved bits can be used. To indicate whether the STA has implemented the case (and, therefore, whether there will be a beam indicator block bit after the PLCP), if the answer is no, then the AP will know that it should not be expected Beam finger after the PLCP header Fu stopped position, but may simply use the omni-directional patterns · _ decoding the remaining portion of the packet. The present invention can also be applied to an example of a mesh architecture in which a mesh node is susceptible to packets from more than one other mesh node. In the example... the role of the mesh_point storage-STA and the -Ap, as described above, this means that a mesh node A will use the mesh node B to send a signal to the mesh in advance. The value of the beam indicator of node a, and the beam finger is used when transmitting to another mesh node B

The indicator is blocked. Conversely, the node B is the value of the beam indicator that the mesh node A 34 M289566 has previously sent a signal to the mesh node B, and is transmitted to the mesh node A. The beam indicator is used to block. As an alternative to having a beam indicator field after the plcp header, the STA may add its address after the pLCP header, however, this is not a probable solution because The STA address is 48 bits long compared to three or four bits of the beam indicator. Another alternative is to replace the beam indicator field with an arbitrary _ STA index assigned by the AP to the STA according to the association and/or subsequent higher layer signaling, according to the associated STAs The maximum number of ru, the STA index can be relatively short (the maximum value is less than ten bits), and the AP will query and use the current best beam for the The STA index specifically mentioned in the preamble, where the AP does not need to send a beam indicator to the STA in each AP to STA packet, but there will be more An extra bit falls after the PLCP preamble. Information _ - The performance information field 1600, as in a beacon frame, - associated request frame, an associated response frame, and a probe response frame, as shown in Figure 16. Some reserved bits. The performance information interception WOO system includes an extended service set (ESS) secondary block 1602, an IBSS secondary field 1604, and a non-contention (CF) pollable secondary field 1606. A CF poll request subfield 1608, a privacy subfield 1610, and some reserved bits 1612. In the 802.11 35.M289566 standard, each of the sub-fields 1602 - 1610 is one bit long ' and ' has 11 reserved bits 1612. In the present case, one of the reserved bits 1612 is utilized for transmitting antenna performance information by using one of the reserved bits as a flag indicating whether antenna performance information is to be transmitted. If the antenna performance information flag is set, then the details of the performance of the antenna will be the extra fast part attached to the end of the packet. The antenna performance information IE may be included as part of an association request lue frame, an associated response frame, a probe request frame, and a probe response frame, and an associated request frame containing the new IE. An example of a portion of the frame is shown in FIG. 17, and the frame 17 includes a performance A block 1702, a listening interval block (Hsten intervai fWd), and - ssidiE 1706' Support rate IE17〇8, and an antenna performance positive 1710, or alternatively, the antenna performance m 171 can be added to any management frame 'eg, a re-association request, re-close the ear; response Or 疋-beacon' above, add to any control duck, or # increase to the data packet. In a preferred embodiment, the antenna performance IE 1710 is transmitted in the form of a management port, and if the antenna performance m 171 is added to the probe request frame, And when the needle is responded to the frame, then the STA can use this information before starting - associated with the private sequence of an AP. The details of the antenna performance IE 1710 are shown in FIG. 8 'and' includes, but is not limited to, an antenna technology shelf 18〇2, 36 M289566 some support beam fields 1804, one for A guard 1806 indicating the support of the transmit antenna data after the pLCp header, a transfer technology block 1808, a stop 181 for indicating support of the antenna measurement signal transmission, and a command to indicate multiple inputs The supported field 1812, in addition, additional antenna performance information may also be included in the IE171. In an embodiment, the maximum amount of information to be exchanged may include the antenna technology unit 1802, and the remaining blocks are selectable, and once the antenna technology form is When it is known, it is also possible to capture the remaining fields (ie, the barriers 18〇4-1812). - After one side (AP or STA) receives the antenna performance from the transmitting side, the receiving side adjusts the local settings for transmission and/or reception, for example, the number of antennas used, diversity The method We Can method), the smart antenna technology used for transmission/reception, as well as additional day measurements. ^ If the receiving side cannot support the antenna function of the transmitting side, the transmitting side will not be able to use the special antenna feature. ^ Some antenna technologies are only on the transmitting side and the receiving side. The two can use the technology to operate correctly. The ^^ is the MM0 technology, which can only be operated when both sides are supported. The 19th system shows a kind of information for exchanging antenna performance. Party 1_. In order to achieve the purpose of the method of the discussion, it is said that the words "transfer STA," and "receive STA,", however, note that j = both the transmitting STA and the receiving STA may be or疋STA, therefore, the exchange of antenna performance information, no matter which M289566

Direction can occur between an AP and one. Between the STAs, or two STAs, at the beginning of the method 1900, the transmitting STa system transmits its antenna performance information to the receiving sm in the mid-antenna performance (step 1902), and the series receiving The STA will receive the block antenna performance pressure (step 1904), and will determine whether it can support the requested antenna performance, and if the received STA can support the antenna of the paging STA = can (step 1906), the receiving STA adjusts its settings to control the antenna performance of the transmitting STA (step 19〇8), and the receiving STA sends an acknowledgement regarding its antenna performance to the The STA is transmitted (step 191〇). In an alternate embodiment of the method 1900, the acknowledgment is sent to the transmitting STA prior to the receiving STA adjusting its settings (ie, steps 1908 and 1910 are converted to each other), and here The information is an acknowledgment of the antenna performance of the receiving STA, which is not necessarily an ACK signal. 'If the receiving STA has some, but not all, the performance of the transmitting STA , then there will be a negotiation between performances to achieve a common set of performance to be used. In a preferred embodiment, the performance used will be a smaller set of performance belonging to two STAs. The transmitting STA begins transmitting using the communicated antenna capabilities (step 1912), and then the method terminates (step 1914). If the receiving STA does not support the antenna performance of the transmitting STA (step 1906), the receiving STA notifies the transmitting STA that it does not have the antenna performance of the 38 M289566 request ( Step 1916), so the transmitting STA will start transmitting without using the requested antenna performance (step 1918), and then the method terminates (step 1914). Figure 20 is a A flowchart of an alternative method 2000 for exchanging antenna performance information between a transmitting STA 2002 and a receiving STA 2004. The transmitting STA 2002 sends its antenna performance information to the receiving STA 2004 (step 2010), and the receiving STA 2004 sends its Skyline performance information to the transmitting STA 2002 (step 2012), Therefore, it should be noted that steps 2010 and 2012 can be performed in the reverse order, that is, the order of steps 2010 and 2012 is not critical as long as the antenna performance information is in the transmitting STA 2002 and the receiving STA 2004. Alternatively, the exchange STA 2002 and the receiving STA 2004 may negotiate antenna performance to discover a common antenna performance set, or may exchange measurement information (step 2014), and this may The step of selecting can be used to refine the set of antenna features used. After the exchange of the antenna information (steps 2010, 2012) and any additional information exchange (step 2014), both the transmitting STA 2002 and the receiving STA 2004 are based on the antenna performance that is locally supported. It is locally determined which antenna feature to use (steps 2016, 2018). 39 M289566 While the transmission of the antenna information has been described in terms of WLAN, the principle of this concept can be applied to any form of wireless communication system as well. U Charger Implementation Fig. 21 is a block diagram of a system constructed to implement various aspects of the present invention. The system 2100 includes an AP 2102 and an STA 2'1〇4, wherein the AP2012 includes an antenna performance determining device 2110, which is stored in a connection to the antenna performance determining device/11 by verification. The antenna performance information of the AP 2012 is determined by the antenna performance information in the antenna performance information device 2112, and the determined line of the AP 2102 is connected to the antenna performance determining device 2110. Said: send 2 weak 2114 and - connected to the antenna 2116 of the transmitter / receiver ^ 14 and send out, and then the beam switching device 2118 will be connected to the transmission H / receiver 2114, sister and will The beam of π & it 2116 is switched. The STA2 will receive the AP 2102 by the 〆 antenna 2120 and a transmitter/receiver 2122 connected to the rim 2120, and it can be determined that the device 2124 will be connected & Hi Antenna performance information. An antenna effect - the A 6 is a scam, and the connection is connected to the secret transmitter/receiver 2122 by the access, or the 斤m λ 夭 夭 妹 妹 能 能 能 能 能 能 2 The antenna effect of the performance determining device 2124 is described in the STA2104. The antenna effect of the AP 2102 is compared with the % entered. The antenna sister can determine the ratio between the antennas of the device 2124 and the antenna. The STA is set to connect to the -STA setting minus (4). The M289566 adjustment device will adjust the performance of the smart antenna. Said setting of STA2104. + It is noted that the negotiation of antenna performance between the ΑΡ 2102 and the 可以 can occur by the respective antenna performance determining devices 2110, 2124. Moreover, while the system 2100 has been described using a ΑΡ 2102, the ΑΡ 2102 in the system 2100 can also be replaced by another STA. Embodiments A method for implementing a smart antenna when establishing an association between a STA and a UI includes the steps of: (a) the AP transmitting a beacon frame on an antenna beam; (b) Receiving the beacon block at the STA; (c) measuring a signal quality of the beacon frame at the STA; (d) switching to a different antenna beam '(e) repeating step (a) - ( d) 'until the beacon frame has completed transmission on all antenna beams; and (or causing the STA to transmit the beacon frame with the highest signal quality on one of its antenna beams) Generating an association. A method for implementing a smart antenna when establishing an association between a STA and an AP includes the following steps: (a) transmitting a probe request frame from the STA to the AP, wherein the probe The request frame may include an indication of whether the STA is to scan multiple beams from the AP; (b) transmitting a probe response frame from the AP to the STA on an antenna beam (C) receiving the probe response frame at the STA, 彳d) Measuring a signal quality of the probe response frame at the STA; (e) switching to a different antenna beam; (f) repeating step (b) _ (e) until the 41 M289566 probe response frame is already at all And (g) causing the STA to associate with an AP transmitting the probe response frame with the highest signal quality on its antenna beam. In the method according to one of the preceding two paragraphs, the method is to wait for a spacing before transmitting the beacon frame and after switching the antenna beam and the spacing is greater than a short period of time The interval between the dragons and the knives is separated by a frame. A system for implementing a smart antenna when establishing an association between a STA and an AP includes a beacon frame transmitted from the AP to the STA. A system for implementing a smart antenna when establishing an association between a STA and an AP includes: a probe request frame sent from the STA to the AP, wherein the probe request frame is a packet/indication of whether the STA is to scan multiple antenna beams from the Ap; and a probe response frame sent from the AP to the STA. In any of the preceding embodiments, the beacon frame or the pin response frame may include an intercept that identifies the total number of antenna beams, and/or an intercept that identifies the current antenna beam. A method for supporting the use of a smart antenna in a WLAN comprising an AP and a 〆 STA comprises the steps of: said AP selecting - an antenna beam for communicating with said STA; Sending the selected beam information to the STA; and transmitting a packet from the STA to the AP, and the packet includes the beam information selected by the 42 M289566, thereby The AP system can use the selected beam to receive at least a portion of the packet. In the method according to the other paragraphs, the selecting step includes selecting an antenna beam by using a large signal level, or selecting an antenna beam by using a maximum signal to interference ratio. In the method according to any one of the preceding paragraphs, the transmitting step comprises: transmitting one or more of the following: a beam indicator; an age limit for the beam indicator, wherein The selected sinus beam will only be used when the age limit has not expired; the medium access control (MAC) address of the Ap; and the MAC address of the STA. In the method according to any one of the preceding three paragraphs, the transmitting step may include transmitting the selected wave information in a separate message. In the method according to one of the preceding four paragraphs, the transmitting step comprises transmitting the selected beam information as part of the existing memory. In the method according to one of the preceding five paragraphs, the step of transmitting, closing, and stepping further comprises: transmitting a beam indicator information flag to 丄=step [

The middle of the frame refers to the presence of the selected beam information. V. In the method according to one of the preceding six paragraphs, the transmitting step is to switch the antenna of the AP to the selected beam before the turtle sends the selected beam information . 43 M289566 In addition to the above-mentioned seven paragraphs, the method further comprises the step of transmitting the selected beam, the money, and transmitting the selected pattern on the bundle. The core line is switched to - omnidirectional. The step of transmitting the sequence information to the AP is based on the successful reception of the selected beam information according to the method of one of the aforementioned eight paragraphs.萑 In the method according to one of the aforementioned nine paragraphs, the further step is: the AP money is received by the omnidirectional beam (four) packet! a first part, wherein the first packet of the packet includes (4) a compensated beam, and the antenna of the AP is switched to the location as stated in the beam information Selecting a beam; and receiving, by the Ap, a second portion of the packet by the selected beam. In a method according to any one of the preceding ten paragraphs, the switching step comprises decoding the first portion of the packet to determine the selected beam. ^ A system for supporting the use of a smart antenna in a WLAN comprising an Ap and an 8 D8 includes: a - packet from the Ap to the STA, wherein the first packet And including a media access control (mac) address, and an address of the STA, wherein the selected beam indicator identifies an antenna beam selected by the AP for use with Communulating with the STA; and transmitting from the STA to a second part of the AP, and the second part is a M289566 beam bundle indicator, whereby the AP will use the selected wave And receiving at least a portion of the second packet. Extract AP as - seal_

In accordance with the second paragraph, #A is the part of the form of the scarf. In the system, the first packet is a system according to the second paragraph, wherein the first packet further increases the age limit of the selected beam indicator, wherein

Φ The selected beam will only be used when the age limit has not expired. In the system according to the preceding four paragraphs, the first packet further includes a beam indicator information flag to indicate the presence of the selected beam indicator among the packets. In the system according to the above fifth paragraph, a first part of the second packet is connected to the AP by an omnidirectional beam

Receiving, wherein the first portion of the second packet includes the selected beam indicator; the AP switches its antenna to as indicated in the selected lu beam indicator The selected beam; and a second portion of the second packet is received at the AP by the selected beam. A system for exchanging smart antenna performance information between a transmitting STA and a receiving STA in a wireless communication system includes an antenna performance information unit for data between the transmitting STA and the receiving STA Before the transmission, the two STAs are exchanged, and the antenna performance component of the 45 M289566 includes information about the performance of the two STAs. In the system according to the preceding paragraph, the wireless communication system is a WLAN, the transmitting STA is an AP in the WLAN, or a STA, and the receiving STA is in the One STA in the WLAN, or 〆Ap. In the system according to any one of the preceding paragraphs, the antenna performance information element comprises an antenna technology interceptor and at least one field selected from the group consisting of: a number of support beams, one related to the physical layer A pointer to support for transmitting antenna information after the header of the convergence protocol, an indicator of the diversity technique, an indicator for antenna measurement signal transmission support, and an indicator for multi-input support. In the system according to one of the preceding two paragraphs, each of the intercepts is derived from the antenna technology intercept by the receiving STA. In the system according to one of the preceding three paragraphs, the antenna effect element is transmitted as a management frame, a control frame, or a portion of a frame of material. In the system according to any one of the preceding four paragraphs, the antenna performance information element is any time after the transmitting STA and the receiving STA generate an association, or at the transmitting STA and the receiving Any point after the data transmission between the STAs is exchanged between the transmission and the receiving STA. A method for exchanging smart antenna performance information between a transmitting STA and a receiving STA in a wireless communication system includes the following step 46 M289566, receiving, determining, and transmitting antenna performance information 1 from the transmitting STA Whether the receiving STA can support the antenna performance of the transmitting STA; if the receiving STA can support the antenna performance of the transmitting STA, adjusting the setting at the receiving STA, and When the receiving STA can support the antenna performance of the transmitting STA, the data is transmitted from the transmitting STA to the receiving STA by using the antenna performance. In the method according to the foregoing paragraph, the method further includes The confirmation of the antenna performance of the Lu receiving STA is repeated to the step of transmitting the STA. In the method according to one of the preceding two paragraphs, the replying step is performed before the adjusting step or after the adjusting step. In the method according to one of the preceding three paragraphs, the replying step $c) includes notifying the transmitting STA that the receiving STA does not have the antenna performance of the user request. • In the method according to one of the preceding four paragraphs, the transmitting step & 糸 comprises transmitting data from the transmitting repair α to the receiving STA without using the antenna performance. In the method according to any one of the fifth paragraphs, the transmitting step comprises transmitting the antenna performance information as part of a management frame. In the method according to one of the six paragraphs, the adjusting step includes: adjusting a setting selected from at least one of the following groups: the number of antennas to be set to the 'diversity method, the smart antenna used Technology, as well as antenna measurements outside the office. 47 M289566 is used in a wireless communication system, a first STA and one

黛# QTA A method for exchanging smart antenna performance information, comprising the steps of: transmitting antenna performance information from the first STA to the second STA; and transmitting antenna performance information from the first STA to the The first STA is described. In the method according to the preceding paragraph, further comprising the step of: locally determining the antenna performance 'at the first STA and the second STA for the first STA and the second Future transmission and reception between STAs. In the method according to one of the preceding two paragraphs, the determining step is performed without any additional communication between the first STA and the second STA. In the method according to any one of the preceding three paragraphs, the method further comprises the steps of: comparing the antenna performance of the first STA and the second STA, wherein the determining step comprises: using the third The antenna performance supported by both the STA and the second STA. In the method according to one of the preceding four paragraphs, the 'more suffix=lelu step, the information between the first STA and the second STA is exchanged, and the exchange step is Executing the determining step before the method according to one of the foregoing five paragraphs, further comprising the step of negotiating antenna performance information between the first STA and the second STA, and the negotiating step is The implementation of the determining step is for implementing a smart antenna in the WLAN. The system A includes an AP and an STA. The AP system includes a first/multiplier decision device; a 48, M289566 line performance information device connected to the first antenna performance determining device, and the first antenna performance determining device is constructed to borrow Determining, by the information stored in the first antenna performance information device, the antenna performance of the AP; and connecting to a first transmitter/receiver of the first antenna performance determining device; a first antenna coupled to the transmitter/receiver; and a beam switching device coupled to the transmitter/receiver, wherein the beam switching device is configured to switch the first day Line beam. The SAT system includes an antenna, connected to a second transmitter/receiver of the second antenna, and the second transmitter/receiver is configured to receive an antenna from the AP a second antenna performance determining device connected to the second transmitter/receiver is connected to a second antenna of the second antenna performance determining device, and The second antenna performance determining device is configured to = the antenna received from the second transmitter/receiver and retrieved from the second antenna performance information device Comparing the STA antenna performance; and the STA setting adjustment device connected to the second cable performance determining device, and the STAS determining device is configured to adjust the setting of the STA to Take advantage of smart antenna performance. In the system according to the preceding paragraph, the first antenna effect determining means and the second antenna performance determining means are constructed to support an antenna capable of both the AP and the STA The position is in consultation. Although the features and elements of the present invention have been described in the preferred embodiments of the specific combination, each of the features or elements are &lt; </ RTI> used separately (in the case where other features and elements of the preferred embodiment are not required) , or 49 M289566 may be used in conjunction with other features and elements of the present invention, or in combination with the specific embodiments of the present invention, as well as many modifications and variations to those skilled in the art. It can be done without departing from the scope of the present invention. The above description is for illustrative purposes and does not impose any particular limitation on the present case. M289566 Schematic description of the brother 1 map, which is a diagram showing the WLAN of the type a slave; (a) and the directional antenna beam pattern; Figure 2: the system is used to identify the antenna beam Figure 3 of the standard: it is a time series diagram of a passive broom; (4) is used for in-passive (four) special delivery,

Figure = figure: it is - the probe request for active sweep μ (4) probe for the silk (four) towel, please request the picture 6: it is a format of the format; 苐 7 figure · its system a timing diagram for an active broom; Figure 8 is a flow chart for a method for requesting a frame in an active woman;

Figure 9 is a diagram showing the packet transmission between a frame and a STAs; 'Fig. 10: It is a diagram of a frame format containing beam indicator information transmitted by a STA; Figure 11 is a diagram of an AP sent to a beam indicator information format; 12a and 12b: it is a frame format of a beam indicator information transmitted by an AP. 51 M289566 Figure 13a and Figure 13b: This is a diagram of an alternate frame format containing beam indicator information sent by an AP; Figure 14: It is transmitted by an AP and a STA Flowchart of a method for intelligent antenna information; Fig. 15 is a flow chart showing an example of the method shown in Fig. 14; Fig. 16:: is a diagram of an existing performance information block Figure 17 is a diagram of a frame containing an antenna performance IE; Figure 18: is a diagram of the antenna performance IE shown in Figure 17; Figure 19: A flow chart of a method for exchanging antenna performance information, Figure 20: A flowchart of an alternative method to exchange performance information of the antenna; and FIG. 21: it is a schema based embodiment of the system block diagram of the case of formula. Component Symbol Description 100 Wireless Local Area Network 200 Advanced Antenna Beacon Frames 112, 122, 910 Omnidirectional Beams 306, 706 Spacing X 500, 700 Advanced Antenna Probe Request Frame 600 Advanced Antenna Probe Response Frame 52 M289566 900 , 2100 System 912 First directional beam 914 Second directional beam 1000 Packet 1100 Information 1200, 1220 Information frame format 1300, 1320 Substitute frame format 1600 Performance information field • 1700 Antenna performance information unit 贞 1710 Antenna performance information unit 2116, 2120 Antennas 220, 514, 1706 Service Set Identification Information Units 114, 116, 118, 124, 126, 128 Multiple Directional Beams BSSID Basic Service Set Identification IE Information Unit FH/DS Frequency Hopping/Distribution System • iBSS Independent Basic Service Set DIFS Decentralized Interframe Interval ESS Extended Service Set PLCP Physical Layer Convergence Protocol MAC Media Access Control STA Station AP Access Point DA Target Address SA Source Address CF No Competition AA Advanced Antenna

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Claims (1)

M289566 X. Patent Application Range: 1. A system for implementing smart antenna features in a wireless local area network, comprising: an access point, comprising: a first antenna performance determining device; a first antenna performance And the first antenna performance determining device is configured to determine the art information stored in the first antenna performance information device Said antenna performance of said access point; a first transmitter/receiver connected to said first antenna performance determining means; a first antenna connected to said transmitter/receiver; and a beam a switching device, connected to the transmitter/receiver, and the beam switching device is a beam for switching the first antenna; and a station, comprising: a second antenna; a second transmitter a receiver connected to the second antenna, and the second transmitter/receiver is configured to receive antenna performance information from the access point; a second antenna performance determining device coupled to the Second pass a transmitter/receiver; a second antenna performance information device connected to the second antenna performance determining device, and the second antenna performance determining device is configured to receive the second transmission from the 54 M289566 pair Comparing the antenna performance of the access point of the device/receiver with the antenna performance of the station extracted from the second antenna performance information device; and a station setting adjustment device connected to the station The second antenna performance determining device is configured to adjust the setting of the station to use smart antenna performance. 2. The system of claim 1, wherein the first antenna performance determining device and the second antenna performance determining device are configured to both reference the access point and the station The level of antenna performance that can be supported is negotiated. 55