Network latency

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Hi,

I am creating (*ehm, trying to) a networked game and I have just started to test it on my Samsung Galaxy SII. As it is a networked game, obviously, I needed one more handset (it's a HUAWEI U8510). The interesting thing is that the network latency greatly varies between the two handsets, albeit being on the same WIFI network. Both handsets have Android 2.3.3.

When I ping my Galaxy SII from my laptop, i get the following times:

PING 192.168.1.108 (192.168.1.108) 56(84) bytes of data.
64 bytes from 192.168.1.108: icmp_req=1 ttl=64 time=63.9 ms
64 bytes from 192.168.1.108: icmp_req=2 ttl=64 time=85.6 ms
64 bytes from 192.168.1.108: icmp_req=3 ttl=64 time=6.18 ms
64 bytes from 192.168.1.108: icmp_req=4 ttl=64 time=29.3 ms
64 bytes from 192.168.1.108: icmp_req=5 ttl=64 time=51.5 ms
64 bytes from 192.168.1.108: icmp_req=6 ttl=64 time=81.3 ms
64 bytes from 192.168.1.108: icmp_req=7 ttl=64 time=96.2 ms
64 bytes from 192.168.1.108: icmp_req=8 ttl=64 time=17.5 ms
64 bytes from 192.168.1.108: icmp_req=9 ttl=64 time=40.4 ms
64 bytes from 192.168.1.108: icmp_req=10 ttl=64 time=62.7 ms

The HUAWEI, on the other hand gives much better values:

PING 192.168.1.105 (192.168.1.105) 56(84) bytes of data.
64 bytes from 192.168.1.105: icmp_req=1 ttl=64 time=2.24 ms
64 bytes from 192.168.1.105: icmp_req=2 ttl=64 time=5.26 ms
64 bytes from 192.168.1.105: icmp_req=3 ttl=64 time=5.16 ms
64 bytes from 192.168.1.105: icmp_req=4 ttl=64 time=1.72 ms
64 bytes from 192.168.1.105: icmp_req=5 ttl=64 time=2.69 ms

Any ideas, what could cause the high latency on the Galaxy SII? The Phone was as much idle, as possible at the time of the ping. Is it some kind of WIFI sleep mode, or bad network driver?

Update: the previous measurements were done on KF1 (Frankenstein) firmware.f
IN there I managed to lower the latency significantly using the WIFI State Lock in android (using the "PERFORMANCE MODE"). If you do this, you receive:

DEBUG/WifiStateTracker(2707): high performance mode: true

Two days ago I updated to KF2. While you can still enable the high-performance mode (you see it in LogCat), the latency is not reflecting this change when you ping the station. KF2 delivers the majority of the pings under 5ms of latency, which is great. There are still some pings over 50ms though (and some over 100ms), but nos as much as before.

However, I am wondering - isn't such well-performing WIFI eat more battery?

Slightly separate however having migrated from the HD2 running android and internet speed seems slower on the SGS2.

The initial connect seems slow. 15 secs latency. The HD2 was almost instantaneous. Eg side by side with an iphone it was way quicker.
The SGSII is a lot slower than the iPhone 2

Originally Posted by dusty_nz

Slightly separate however having migrated from the HD2 running android and internet speed seems slower on the SGS2.

The initial connect seems slow. 15 secs latency. The HD2 was almost instantaneous. Eg side by side with an iphone it was way quicker.
The SGSII is a lot slower than the iPhone 2

+1, same problem for me, and I sue ROM Thunderbolt 1. 2 and modem Kf2. same problem with modem ke7