Short guard interval should be used in only good RF environment, otherwise intersymbol interference because of shorter GI will result in data corruption, layer 2 retransmission and throughput will be adversely. 3 lb (0. We can see that the host has 2 Spatial streams, is using a Short guard interval , 40 MHz channel and the data rate is 300 – the data rate is the highest capable with these settings. Multiple MIMO streams can multiply the 802. All forum topics; Previous Topic; Next Topic; 2 REPLIES 2. Short Guard Interval Supported : Protection : Beacon Interval (Msec, Range: 20 - 2000) DTIM Period (Range: 1-255) Fragmentation Threshold (Range: 256-2346, Even Numbers) RTS Threshold (Range: 0-2347) Maximum Stations (Range: 0-200) Transmit Power : Fixed Multicast Rate. Anonymous. thecompnerd, Short guard interval is a standard that is supported by the AP225. 11 {a | b} 11nsupport guard_interval {any | long} Configure the Reduced Interframe Space (RIFS) for the network by entering this command:. Set the duration of the transition time (Ttr) in the windowing function. 802. TX Power GI，即Guard Interval，中文叫保护间隔。 射频芯片在使用OFDM调制方式发送数据时，整个帧是被划分成不同的数据块进行发送的，为了数据传输的可靠性，数据块之间会有GI，用以保证接收侧能够正确的解析出各个数据块。无线信号在空间传输会因多径等因素在接收侧形成 Enabling a short guard interval can decrease network overhead by reducing unnecessary idle time on each access point. Channel width multiplication factors are 1 for 20MHz BW, 2. MCS: SU MCS/MU. On the other hand, if the guard interval is too long, there is increased overhead due to the additional idle time. 8µs กับ Short Guard Interval (SGI) 0. B QUESTION: 28 You are reconfiguring an AP to use the short guard interval. cfgHT = wlanHTConfig(Name,Value) sets properties using one or more name-value pairs. 802. Use either the short guard interval (Short GI) of 400 ns or the long guard interval (Long GI) of 800 ns. This parameter is enabled by default. Try to avoid cordless phones as they are considered a big source for interference. Systems, methods, and other embodiments associated with a single stream wireless communication with a greenfield preamble that uses a short guard interval are described. The. 30 Day Returns and Exchanges. In Stage One, Burst ANN is first performed temporally to process the received bursts after fundamental. 160 MHz channel, 1 spatial stream, short guard interval, VHT, MCS7 (up to 650 Mbps). enable. Short guard interval in 20 MHz mode. 11n data rate chart (Table. 6 µs) GI and quadruple (3. short guard intervals, then typically the use of short guard interval will be selected because it offers a higher rate. 25 KHz for 802. show ap ht-rates. 2us (0. 6 microseconds of the symbol time available for data compared with 3. The guard interval between symbols helps receivers overcome the effects of multipath delays. 4 GHz 1 1 5 GHz 1 1 Wi-Fi Component Operating System Android 13 Wi-Fi Component Firmware 2022-06-30-092102 Page 2 of 4 Wi-Fi CERTIFIED™ Certificate Certification ID: WFA121453 Role: Access Point Wi-Fi ComponentsWhat phrase correctly completes the following sentence? When using WMM Power Save operation, a wireless client device . 11n on 5 GHz. 11n radios. If you would use mixed mode, always make sure these are disabled, as these features were designed to be used with 802. It reduces the idle time in quiet environments and increases data rate by 11%. Network performance may be higher when short preamble is enabled. Short GI: disabled- Short Guard Interval decreases the time between data characters being sent wirelessly. - Agreed. TX Power (%) If Auto TX Power Control is disabled, enter the TX power in the form of the percentage of the total available power. 11n was released it included an optional Short Guard Interval (SGI) function that reduced the amount of delay spread protection by half, from 800 ns to 400 ns (. Channel width: 20/40MHz: Channel: Enable. In this video, i tell about to improve home router network stability. ” 3. 例えば電気信号を無線通信など空間を伝搬さ. Pilih Wi-Fi control untuk masuk dalam pengaturan Wi-Fi yang Anda inginkan. . Short Guard. RE: Short Guard Interval - 20MHz. Another optional support is the reduction in the guard interval (GI) for each OFDM symbol. Enabling a short guard interval can decrease network overhead by reducing unnecessary idle time on each access point. This allows you to increase the radio throughput by sending multiple data frames in a single. Command. Short Guard Interval STBC SU beamformer Wi-Fi CERTIFIED™ b Wi-Fi CERTIFIED™ g Wi-Fi CERTIFIED™ n OBSS on Extension Channel Short Guard Interval STBC A-MPDU Tx Wi-Fi Protected Setup™ PIN Pushbutton Page 3 of 4 Wi-Fi CERTIFIED™ Certificate Certification ID: WFA123305 Role: Access PointSystems, methods, and other embodiments associated with single stream wireless communication with greenfield preambles using short guard intervals are described. To reduce complexity, short guard interval is only implemented as a final rate adaptation step when the device is running at its highest data. Command Information. Tick: Enable Short Guard Interval (This would avoid any kind of data loss from wireless interference) or Enable Aggregation (it increases throughput of 802. Systems, methods, and other embodiments associated with a single stream wireless communication with a greenfield preamble that uses a short guard interval are described. When short guard interval is used (400ns GI), a subcarrier carries 312. 38 inches (86 x 86 x 35 mm) Weight 1. ) Otherwise leave off 1 、 GI 的作用. Compare the features and options with previous versions and other Fortinet products. The command is: config 802. 11n Introduces Short Guard Interval (SGI) When 802. The algorithm starts with the lowest parameters (associated with the worst throughput, but with the best reliability) and interleaves MCS Scaling phases and Column Scaling phases, forming a ”search cycle”. Using personal security mode for your. The guard interval is the amount of time that the WAP waits between transmissions, which prevents interference. TX Power Control. • Part of Mixed mode frame format. I was under the impression from reading online, that disabling frame aggregation and short guard interval would help with Macbook or apple computer connectivity. In 802. 11 requires a guard interval that makes it so transmissions do not interfere with one another. Lifetime Guarantee. 6 (SGI) Enabling a short guard interval can decrease network overhead by reducing unnecessary idle time on each AP. The subsequent 24 modes run by this program are variations with short guard interval enabled (cases 9-16), and then with channel bonding enabled and short guard first disabled then enabled (cases 17-32). 11n, short guard intervals are possible. This option is only available for 2. HA heartbeat packets consume more bandwidth if the hb-interval is short. About This Document. run short unless you are seeing issues, or even better, try both and see what effects it has on your network. 11n, the guard interval has been reduced from 800 ns to 400 ns to boost the throughput. • Primarily used on AP side to reduce Guard interval between frames to improve performance. • 11 days ago. • Helps improve data rate in Up/Down if both AP and STA support Short GI. 1. 11n was released it included an optional Short Guard Interval (SGI) function that reduced the amount of delay spread protection by half, from 800 ns to 400 ns (. 12-12-2017 10:35 PM. • 11 days ago. Your ubiquity probably does 2 streams, be happy with 130mbit. 93Gbps using 160MHz bandwidth,8 spatial streams,MCS9,256QAM,with short guard interval. • Modulation Scheme OFDM and DSSS/CCK. Free Shipping on All Orders. Data frames will be divided into several symbols when being transmitted. A guard interval is a period of time between transmissions that allows reflections from the previous data transmission to settle before an AP transmits data again. Since I've never heard of "Netlo" and can't easily find it with an Internet search, I don't have any confidence in it as a benchmark tool. Shorter wait time (guard interval) between symbols increases throughput. 4. I recently got a Unifi system, thinking they would be customization since it's enterprise, but there is no way to adjust advanced wireless settings such as "Frame aggregation", "Preamble Length", and "Short Guard Interval". If the short guard interval does not allow enough time for reflections to settle in your mesh deployment, inter-symbol interference values may increase and degrade. By analyzing the noise sources, this. 5Gbps. From 802. 8us cyclic prefix) 12. Values mentioned in 20 MHz is for 1 stream, and for 8 stream for 40,80 and 160 MHz. More googling suggests that a USB-GbE adapter would still be limited to somewhere just over. 11n mode allows for a reduction in this guard interval from the. Short GI(Guard Interval) 是 802. 11ac). 11n-2. Select to enable the short guard interval for 802. 4. 800 ns short guard interval. which is a combination of mode (legacy, SISO, MIMO), guard interval, and antenna configuration param-eters. When there are too many WiFi router in your neighbour then all of network channel get o. TX PowerSystems, methods, and other embodiments associated with a single stream wireless communication with a greenfield preamble that uses a short guard interval are described. To prevent inter-symbol interference (ISI), the guard interval is a very basic level of time spacing between symbols. 6 kg) Mounting Options Wall Included Accessories None Environment Power Supply PoE 802. 60 GHz 802. Indeed, the shorter guard interval evidently results in intersymbol interference (ISI) and intercarrier interference (ICI), but the gain offered by shortened guard interval may exceed the loss caused by interference. 4 GHz Spectrum Capabilities 20 MHz Channel Width in 2. 11n 针对 802. On the web I found that I can enable the short guard interval capabality by setting the option ht_capab in the /etc/config/wireless file. Auto TX Power Control : Enable automatic adjustment of transmit power. (See Figure 51. The guard interval prevents Inter-Symbol and Inter-Carrier Interference (ISI, ICI). 11ac, short guard interval ( 400 ns) is introduced, while the default value of GI is still set as 800 ns. 64-QAM. 11 {a | b} 11nsupport rifs rx {enable | disable} Save your changes by entering this command: save config Ensure to keep at least 6 dB lower value on 2. Symbols are what carry the bits (0s and 1s). 11ax has three types of GI – the normal GI (0. Bit 0 sets to 1 to indicate that short GI is supported on 20MHz bandwidth. For example, wlanVHTConfig('GuardInterval','Short') specifies a 400-nanosecond guard interval (cyclic prefix) duration. Configure Wireless MAC. Normalmente los routers están configurados de manera predeterminada con un «Short Guard», por tanto, tendremos la máxima velocidad posible. Option. 11n/g/b, and 5GHz 802. TX Power Control. • Guard Interval: Choose either Long (800 ns) or Short (400 ns) that the security appliance will retry a frame transmission that fails. P. In IEEE 802. Short GI: GI stands for guard interval. 11 OFDM is 0. 11n amendment added support for an optional 40MHz channel. Determine whether the OFDM symbols adopt the short guard interval which is 400ns. Guard interval duration 0. Also used in TDMA transmissions. ” 3. 4Ghz any to allow either short or long guard interval. 4GHz spectrum. Don’t. . Select the channel or channels to include. Poi se avete consigli su come ottimizzare la mia linea internet dite pure. Description. It indicates that the client stations are currently sleeping in low-power mode. If I fix the capability to 20MHz channel width with long guard interval, I still see some (around 10%) of the packets wtih 40MHz channel width and/or short guard interval. The main requirements are: Long enough to "swallow" the duration of the longest expected channel impulse response to inhibit ISI / make the linear convolution channel effect look like a circular convolutionBeacon Interval - Specify the Beacon period for the AP in milliseconds. When you add a guard time, the back portion of useful signal time is copied and appended to the front. Question #: 22. Short guard interval in 20 MHz mode. Occasional Visitor. Enabling a short guard interval can decrease network overhead by reducing unnecessary idle time on each AP. Default. Recommend you only do this on A band. If you selected a mode that contains 802. Two settings are available: short (400ns) and long (800ns). 11a/g 所做的改进。 射频芯片在使用 OFDM 调制方式发送数据时，整个帧是被划分成不同的数据块进行发送的，为了数据传输的可靠性，数据块之间会有 GI ，用以保证接收侧能够正确的解析出各个数据块。 A shorter guard interval results in a shorter symbol time, which increases the data rates by about 10% and increase throughput greatly. Each sub-channel needs at least one “pilot” sub-carrier used by. A guard interval is a period of time between transmissions that allows reflections from the previous data transmission to settle before an AP transmits data again. 11ac/ax. Hello, because our wireless analyzer can't capture packages transmitted in Short-GI model, we want to disable the Short-GI (guard interval) for AP/AC, we didn't find the configure for disable short-GI in the configuration tools for AP/AC. 11n and 802. Short Guard interval & Aggregation. This can be used with either Basic or Advanced. Short guard interval (SGI) is a new feature of the physical (PHY) layer in High Throughput Wireless Local Area Networks (HT-WLANs), like IEEE 802. 6 = 277. 4GHz frequency band unlike 11n. For 802. Systems, methods, and other embodiments associated with a single stream wireless communication with a greenfield preamble that uses a short guard interval are described. The. You, as the designer of an OFDM system, define the length of the CP based on your requirements. With the advantage of tolerating shorter guard interval and noise in the temporal burst processing window, the burst equalization (Burst ANN) enables a short guard interval length that occupies 1/5 of the useful duration in this system. Notice the RSSI is -44 and we are just using 64 QAM, you really have to be close and have a clear spectrum to achieve 256 QAM. According to one embodiment, a wireless communication device includes a receiver configured to receive an orthogonal frequency-division multiplexing (OFDM) signal. An AP identifies any signal content. Short Guard interval (400ns) - optional (though optional but is widely supported) LDPC (Low density parity check code) - optional STBC (Space time block coding) - optional TxBF (transmit beamforming) - optional Support for MCS 8 and 9 (256 QAM) - optional Guard Interval: it is the space between symbols being transmitted. ap (config-if)#guard-interval long. Short Guard interval & Aggregation In the screen shot above you will notice that Short Guard Interval and Aggregation are both disabled. The purpose of a guard interval is to introduce immunity to propagation delays, echoes, and reflections to which digital data is normally very sensitive. 11n. Data rate: 6. 6us (short guard interval) 4us (long guard interval) 3. The AP 3500 supported up to 300 Mbps (MCS rate 15) configured with a bonded channel and short guard interval (GI). 11n, the different rates are called the Modulation and Coding Scheme (MCS) index value, and the value defines how many streams are used. 4 x 3. Compared with the traditional OFDM systems, the length of the guard interval for the proposed design can be distinctly reduced, thereby improving the spectral efficiency. 1 Kudo Reply. The 802. It misses 20% to 30% of short guard interval packets. Some outdoor deployments, may, however require a longer guard interval. The shortest interval (1/32) provides the lowest protection and the highest data rate; the longest interval (1/4) provides the highest protection but the. 0. The MAX link speed 11AC client could achieve with 2 spatial streams on 80Mhz bandwidth and short guard interval is upto 866 MBPS. Short Guard Interval Supported. 11n on 5GHz. Fri, Nov 24, 2023, 8:06 PM EST · 2 min read. Multi-user: indicates the coding for user 0. You’d be missing a valuable opportunity to improve your network’s performance right from the get-go. Guard interval is a period of time between symbols that accommodates the late arrival of symbols over long paths. Pada Wifi, OFDM disediakan 2 Guard Interval o Long GI: 800 ns o Short GI: 400 ns Karena kanal sudah di pecah-pecah menjadi carrier yang kecil-kecil dan saling ortogonal, maka aman jika di terapkan Short GI. If it's set to any, it defaults to 400ns for compatible clients. 802. length, FEC encoding type, guard interval, number of extension spatial streams, etc. 2. SGI should be used only in good and clean RF (Radio) environment. A heartbeat interval of 2 means the time between heartbeat packets is 200 ms. The 144 Mbps you have in Autonomous mode are 20 MHz channel, two spatial streams, short guard interval and HT MCS15 which is a 802. Accordingly, the interval select logic 120 of FIG. The first 8 modes correspond to short guard interval disabled and channel bonding disabled. Short Guard Interval (What is Guard Interval?) Guard Interval is used to avoid signal loss from multipath effect. Using personal security mode for your. 5kbps × 3. 11n/ac/ax/be, the Guard Interval selection is 1/4, 1/8, or 1/16. 11n-2. Short Guard Interval Supported — This field is available only if the selected radio mode includes 802. Tail bits: must all be 0. 3A Other languages German (de) French (fr) Other versions. 11 11nsupport guard. It’s generally recommended that you maintain a short GI. Most reflections are received quickly. 11 OFDM is 800 nanoseconds in duration. For example, wlanVHTConfig('GuardInterval','Short') specifies a 400-nanosecond guard interval (cyclic prefix) duration. The guard interval should be 2-4 times the length of the delay spread. 11a/b/g used a mandatory 800ns guard interval. MU-MIMO is short for Multi-User, Multiple-Input, Multiple-Output. 11ac 2x2 MIMO. Channels. Short Guard Interval - Enables/Disables Short Guard Interval. Athan Frequent Visitor Posts: 90 Joined: Mon May 31, 2010 12:48 pm. I realize some of those configurations aren’t workable in real networks. The guard interval is a pause in transmission intended to avoid data loss from interference or multipath delays. At the receiver,. The Internet Group Management Protocol (IGMP) is a protocol used by devices and routers to exchange information. C. Announcement. Short GI = good, association and signal is robust, so wireless frames use a shorter interval spacing to save time on the channel, thus increasing throughput. 802. Multiple MIMO streams can multiply the 802. Post by Athan » Mon Jan 17, 2011 11:36 am. 802. The 802. • Helps improve data rate in Up/Down if both AP and STA support Short GI. Finally nearly two years after getting my Quest it finally sees my 5GHz wifi. 802. 在接收和发送数据的过程中或者是多次传输的过程中，由于无线信号在空间传输存在多径干扰，设置间隔时间可以降低干扰影响，这个间隔时间称为Guard Interval，简称GI。. Step 2: Select the 11n Mode check box to enable 802. 11b/g/n > High Throughput to open the (5 GHz or 2. The guard interval (GI) are necessary for prevention of inter-symbol and Inter-carrier. 46 kg) Package (shipping) Weight 1. guard-interval (any | long; Default: any) Whether to allow use of short guard interval (refer to 802. IEEE802. 8µs) and short GI (0. If it's set to any, it defaults to 400ns for compatible clients. So your C1701 can do 400 Mbps with 40 MHz channel, two spatial streams, short guard interval and VHT MCS9 which is a 802. client-monitor policy default_Policy problem-type networking trigger-times 3 report-interval 3600. Wi-Fi 6 handles client density more efficiently through a new channel-sharing capability that promises true multi-user. According to one embodiment, a wireless communication device includes a receiver configured to receive an orthogonal frequency-division multiplexing (OFDM) signal. Note: The Linksys USB600N does not reliably collect 11n packets with short guard interval. So you're limited to 65mbit per spacial stream. Shorter wait time (guard interval) between symbols increases throughput. 11ac, the Long Guard Interval (LGI) factor is 4 and Short Guard Interval (SGI) is 3. Disclosed are a method and a device for transmitting and receiving a frame using a short guard interval. 2 MinstrelHtWifiManager MinstrelHt (Figure 2), extending the legacy Minstrel model, is based on the Linux implementations of the same name. Select Enable Aggregation to enable it. 11 set of protocols (which is part of the Wi-Fi networking family), providing high-throughput wireless local area networks (WLANs) on the 5 GHz band. Hence, in TGaf capable devices shall support both guard interval modes (short and normal). 4 GHz 5 GHz Spectrum Capabilities 20 MHz Channel Width in 5 GHz 40 MHz Channel Width in 5 GHz 80 MHz Channel Width in 5 GHz Protected Management Frames WMM® WPA2™. since 802. Penambahan guard interval wifi dapat menambah konsumsi daya baterai pada perangkat wifi, karena durasi antara sinyal yang dikirim dan diterima. A guard interval is a period of time between transmissions that allows reflections from the previous data transmission to settle before an AP transmits data again. Easily deployed as a wall-mounted or desk-mounted access point, it’s perfect for home offices and small branch offices. For example, in DVB-T, guard intervals are available as 1/32, 1/16, 1/8 or 1/4 of a symbol period. "any" will use either short or long, depending on data rate, "long" will use long. The command is: config 802. This should only be a temporary configuration change. 4. So: config 802. SGI = short guard Interval i = idle or what ever: back in the days i googled those and checked the ddwrt wiki. When the classic (long) guard interval of 800ns is used, only 3. This should be only a temporary configuration change. 2us cyclic prefix) Highest Modulation. The available channels depend on which IEEE wireless protocol you selected in Band. 3. 11n MCS specification to see how this may affect throughput). For short guard intervals (400 ns): 0 to 16 samples. Short guard interval in 20 MHz mode. Packets larger than the size you specify here will be fragmented. When you add a guard time, the back portion of useful signal time is copied and appended to the front. 11a and 802. In one embodiment, the short guard interval can reduce overhead associated with the. OFDM uses two GIs–either standard 0. Jun 11, 2017. A short guard interval potentially increases throughput but is more susceptible to interference. 11n you can choose between a short guard interval and a long guard interval. They will not work, no way no how. The regular guard interval is 800ns. 4 µs or 0. 4. Now, if you use short guard interval the max data rate will increase to 144. When deploying a wireless network in an environment with many obstacles, there will be diffraction, scattering and reflection. since 802. reach out to ATAC and have them do a health check to make sure there aren’t any unnecessary nerd knobs flipped on. In one embodiment, a wireless communication device includes: a receiver that receives an orthogonal frequency division multiplexed signal (OFDM signal) that includes a green field preamble; Interval. 11 {a | b} 11nsupport. It turns out the answer was to disable the "Short Guard Interval" setting. B. This parameter is enabled by default. Step 3: Select the check boxes of the desired rates to specify the modulation and coding scheme. Learn how to create a FortiAP profile to configure the radio and network settings of your FortiAP devices. TP-Link announced the world's first 802. The long Guard Interval (GI) and short Guard Interval (SGI) are functions built into OFDM that help to mitigate these effects. 例えば電気信号を無線通信など空間を伝搬さ. The 802. The 802. A good rule of thumb from my experience in a non-congested environment with MCS 9 and short guard interval is about 2. Now, that provides minimum datarate of 130 Mbps (the minimum is with long guard interval and with 20 MHz channel). since 802. 80 MHz channel, 2 spatial streams, short guard interval, VHT, MCS7 (up to 433 Mbps). By clicking Accept, you consent to the use of cookies. 802. How long will the new guard interval duration be after the change? A. MU-MIMO is an enhanced form of the MIMO. Short Guard Interval (SGI) is a protocol that lowers the guard interval by 400ns and improves the wireless data rate. . People, be good wifi neighbors. 4 GHz Spectrum Capabilities 20 MHz Channel Width in 2. Configure the guard interval for the network by entering this command: config 802. Trong khi đó, tính năng Short Guard Interval sẽ làm giảm thời gian truyền các gói tin, đồng thời tăng tỷ lệ truyền dữ liệu. - 72969 This website uses cookies. 11n dan TDMA. Guard intervals (GI) are necessary in OFDM to reduce the likelihood of interference between two consecutive _____. 11n amendment added support for an optional 40MHz channel. _____ Atheros TP-Link WR740Nv1 ---DD-WRT 53045 WAP. 11g network and the reported connection speed also fluctuates wildly,. Even at that I must be missing something with the modulation scheme, because the Nyquist max bitrate for 80Mhz and 256 QAM (8 bits per symbol) should be 480Mbps. transmit_optimize. 8us (0. " The. This command is applicable only to 802. Channel width: 20/40MHz: Channel: Enable DFS and set channel from 100-140:. When Short GI is enabled, the guard interval will be set as 400ns and this function will boost the performance about 11%. 11 operation is 800 ns. Hence, in TGaf capable devices shall support both guard interval modes (short and normal). 11n bands. 11ac data rate. Otherwise said, you should set a relatively short amount of time between the transmission of. If the short guard interval does not allow enough time for reflections to settle in your mesh deployment, inter-symbol interference values may increase and degrade. The available channels depend on which IEEE wireless protocol you selected in Band. 11n. Short Guard Interval STBC LDPC Tx SU beamformee Wi-Fi CERTIFIED™ b Wi-Fi CERTIFIED™ g Wi-Fi CERTIFIED™ n STBC A-MPDU Tx OBSS on Extension Channel Power Management Short Guard Interval Wi-Fi Direct® Wi-Fi Protected Setup™ PIN Pushbutton Wi-Fi Agile Multiband™ (continued) Beacon Report Measurement Passive. thecompnerd. 4 GHz. 11ac is not directly defined in data rates speed, but is rather a combination of 10 modulation encoding scheme (MCS 0 to MCS 9), a channel width ranging from 20mhz (1 channel) to 160Mhz (8 channels), a number of spatial streams (typically 1 to 4). Short guard interval in 20 MHz mode. Developed & Tested by Core Athletes. 2 microseconds of. Ideally, the guard interval is set to just above the delay spread of the channel. I recently got a Unifi system, thinking they would be customization since it's enterprise, but there is no way to adjust advanced wireless settings such as "Frame aggregation", "Preamble Length", and "Short Guard Interval". Fig. This happens when subsequent transmissions interfere with previous ones. Reducing the guard interval can yield a 10% improvement in data throughput. 8. When the classic (long) guard interval of 800ns is used, only 3. On Radio settings disable Short Guard Interval and Aggregation. Guard Interval. However for office environments, having a Short Guard Interval (SGI), which lowers the interval to 400ns, can give you an increased data rate of 11%. Does anyone know where you can configure short/long Guard Interval (SGI / LGI) on SmartZone controlled APs? I have an outdoor deployment I think may be suffering from some ISI which I'd like to configure to LGI to see if that helps with data rate stability. 11ax) is the new generation of Wi-Fi technology with a new focus on efficiency and performance. The purpose of a guard interval is to. Most reflections are received quickly. Be sure the wireless client can support this to avoid compatibility issues. You’d be missing a valuable opportunity to improve your network’s performance right from the get-go. Enable SGI (Short guard interval) Client load balancing: Enable Freq handoff and AP handoff for areas with more significant amounts of connected devices (Greater than 20 heavy usage devices. AP type: Indoor Hardened, Wi-Fi 6 dual radio, 5 GHz 4x4 MIMO and 2.