The messages arrive from different continents and describe the same thing. A student in France or the Netherlands says the accommodation WiFi will not hold up for everyday use; students in Sydney say it is fine for browsing but spikes and lags the moment they play. It is worth saying plainly why this happens: with shared building WiFi you do not control the one thing that matters most — how far you are from the access point, and how many people are sharing it. You cannot fix that from inside your room. What you can do is stop relying on it, and there are exactly three ways to do that.
这些私信来自不同的大洲，描述的却是同一件事。法国、荷兰的同学说公寓的 WiFi 连日常使用都撑不住；悉尼的同学说刷网页没问题，一打游戏就跳 ping、延迟高。有必要把原因直说：楼宇共享 WiFi 里，你恰恰控制不了最要紧的那两件事——你离无线接入点有多远，以及有多少人在和你分。这一点在自己房间里是修不好的。你能做的是别再依赖它，而办法一共只有三条。
In almost every one of these messages the building's own connection is not the problem. The loss happens in the last few metres: a corridor access point shared by everyone on your floor, with your walls in between. That is why a speed test can look acceptable and a game still feels terrible — shared wireless degrades in stability and latency long before it degrades in raw throughput. It also explains why nothing you change on your laptop helps: the weak link is outside your room.在这类私信里，楼里的宽带线路本身几乎从来不是问题。真正丢掉的是最后那几米：一个整层共用的楼道无线接入点，中间还隔着你房间的墙。这就是为什么测速看起来还行、游戏却依然难受——共享无线是先在稳定性和延迟上垮掉，很久之后才轮到吞吐量。这也解释了为什么在你笔记本上怎么设置都没用：最弱的一环根本不在你房间里。
| What you need你需要什么 | What it gives you你能得到什么 | |
|---|---|---|
| 1. Your own connection1. 自己单独开通 | An address the provider will actually connect一个运营商确实能开通的地址 | A connection that is yours alone — the best outcome by far一条完全属于你的线路——毫无疑问是最好的结果 |
| If wired is not available如果开通不了有线 | A SIM-based wireless plan with a router, if your address supports it在地址支持的前提下，考虑SIM卡+路由器的无线套餐 | Independent of the building, but check coverage at your address first不依赖楼里的网，但要先确认你这个地址的覆盖情况 |
| 2. The wall Ethernet port2. 墙上的网口 | A cable, and five minutes to test whether the port is live一根网线，以及五分钟去测网口是不是通的 | A wired run to your desk, plus your own WiFi if you add a router一条直达书桌的有线，再加一台路由器就有了自己的WiFi |
| 3. Repeat the building WiFi3. 中继楼里的WiFi | A router that supports repeater mode — ASUS is a safe bet abroad一台支持中继模式的路由器——在海外买华硕比较稳妥 | A stronger signal in your room; still shares the building's wireless房间里信号更强；但仍然在分享楼里的无线 |
| What we deployed我们实际做过的 | Option 3, in a Sydney student dorm, on an ASUS router第三种，在悉尼某学生宿舍，用的是华硕路由器 | The student reported the experience improved afterwards该同学之后反馈体验有改善 |
Shared student accommodation WiFi fails in the last few metres: a corridor access point shared by the whole floor, with your walls in between, which is why gaming spikes and lags while a speed test still looks acceptable. There are three ways out, worth trying in order — check whether your exact address can take its own connection, test whether the wall Ethernet port is live and wire into it (adding your own router behind it if you want good WiFi too), and failing both, repeat the building WiFi with a router that supports repeater mode. In one Sydney dorm we deployed that third option on an ASUS router, and the student reported the experience improved.
学生公寓的共享 WiFi 是在最后几米垮掉的：一个整层共用的楼道接入点，中间还隔着你房间的墙——所以测速看着还行，游戏却跳 ping、延迟高。出路一共三条，值得按顺序试：先查你这个准确地址能不能单独开通；再用网线测墙上的网口是不是通的、通就直接有线接上（想要好用的无线就在网口后面加一台自己的路由器）；两条都走不通，就用一台支持中继模式的路由器去中继楼里的 WiFi。我们在悉尼某学生宿舍采用的正是第三种方案，用的是华硕路由器，该同学之后反馈体验有改善。
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