The bandwidth strategy is the most neglected configuration in the wireless wifi system on campus. Many schools go online and pay for their meals, with a focus on certification methods and billing packages, either default configuration or other school parameters.
Three dimensions of bandwidth policy
The bandwidth policy configuration of the wireless Wifi system on campus is usually three dimensions: user dimensions (by individual user speed), regional dimensions (by VLAN or SSID speed), time dimension (adjusted speed values in current session). Three dimensions can be added to each other.——For example, the accommodation area has a 4M speed limit during working days, 2M speed limit at night and no speed at weekends; the teaching area has a 2M speed limit during working days (preventing the use of video from classes), and freeing up to 4M between classes and evenings. The logic of configuration is not difficult to understand; it is hard to determine what parameters are. The limit value for each region is not given by a number of numbers.
Miscalculation one: Speed-limit by package type
The school wireless wifi system in many schools limits speed by type of package: Basic 2M, Standard 4M, Advanced 8M. This configuration seems logical but it's not working well. If 80% of users across the school choose Basic 2M, 80% of users are online at the peak time, 2M is online at the same time.×Online users may be far above the export belt tolerance."Give each user a commitment speed"No, it's not."Make sure every user runs this speed.". If the bandwidth is not enough for exports, all users will be compressed to levels well below the promised speed, and the package speed will expire.
The correct configuration is based on the number of online users at peak hours, using capacity, first for export belt tolerance.÷Online users get the average bandwidth available to each user. The set speed value should be designed around this mean, instead of giving a number that seems reasonable in isolation from the band. For example, export bandwidth 4G, peak online users 2,000, with an average bandwidth of 2M. Basic package 1M, standard package 2M, advanced suite 4M, total bandwidth requirements (assuming 80% base, 15% selection criteria, 5% selection) = 1M×1600+2M×300+4M×100 = 2.6 G, less than 4G export, does not overload. If the base set is 4M, total bandwidth needs become 4M×1600+6M×300+8M×100 = 7.8 G, far beyond export, with all people at peaks.
Miscalculation II: Same speed limit for dormitories and teaching areas
The use of the dormitories is very different. The use of the accommodation areas is limited to evenings (20:00-23), mainly video, games, socialization, and bandwidth needs are high.
The campus WiFi system should support the regional differential speed limit configuration."More people at lower speed."The differential configuration requires automatic time-to-time speed transitions, not manual changes by the carrier. Manual modifications are easy to make and cannot be made with precise timing shifts.
Miscalculation III: Speed limit equals actual available speed
The speed limit for the wireless WiFi system on campus is a bandwidth restriction at the end of the export, but actual user perception of the speed of the net is also influenced by factors such as wireless signal quality, access equipment performance, TCP protocol efficiency. Users with a 4M limit may actually run only 1M in the area where the signal is bad.——Not the speed limit of the billing system is a problem, but the wireless signal coverage is inadequate. Some schools have received large numbers of complaints about the speed of the net after they went on the wire-based system, and the screening has revealed that the problems are not in bandwidth strategy, while the AP coverage density is insufficient or the signal interference is severe.
Misjudge four: ignore automation of time-time strategy
The speed limit policy does not automate, so the operator changes the configuration manually every day. Manual operations are more than just time-consuming——I have seen the operators switch their speed limit from 4M to 2M on Friday night (the correct evening peak strategy), but forget that Monday morning has changed back to 4M, resulting in a large wave of complaints by students who run at 2M during the daytime of Monday. The wireless WiFi system on campus should support time-time automatic switching, and the operator would only need to set a timetable and corresponding speed limits for an automated implementation of the system. If the costing system does not support automatic time-to-time transition, this function should be used as a mandatory screening condition for optional strategies.
Misjudgement V: Lack of equitable use strategy
Fair access strategy is an important complement to the bandwidth management of the wireless WiFi system on campus. The logic is that when export bandwidths are used above a certain threshold (e.g. 80%), the system automatically compresses all online users ' bandwidth to ensure that each user has at least some basic available bandwidth, rather than allowing a few high-flow users to fill their exports, which makes it completely inaccessible to others. Some schools’ billing systems fail to implement equitable access strategies, with peak time periods being filled by several users who watch videos and download large files, while other users' web speeds are almost non-usable. The introduction of equitable access strategies has resulted in a compressed bandwidth for high-flow users and the guaranteed minimum bandwidth for low-volume users, which is better overall.
The rhythm of bandwidth policy
The bandwidth strategy is not always available. The first two months of school are critical periods for the improvement: collecting actual bandwidth utilization data from all regions and time segments, and looking at deviations against predefined speed limits. If the bandwidth usage during peak times in a given region remains below 50%, it may be allowed to be reduced if the speed limit is low; if the use continues to exceed 90%, indicating high speed limits or insufficient export bandwidth, then either the adjustment strategy or expansion of exports will need to be adjusted. The improved data is derived from the bandwidth statistical statement of the system, which is not subjective perceptions of the carrier.
Bandwidth policy configurations seem to be a technical parameter problem, but behind them is the logic of how schools allocate bandwidth resources. Each parameter value corresponds to an allocation preference——The choice is whether the school area is one of dormitories or a room. These preferences are defined by the decision-making level in schools, rather than being left to the carrier to fill out a number.