For improving HOSR,its better to stick to the basics,co-bsic-bcch removal,check for clock issue in BTS,etc etc.
Other than this,you can increase the “Max Resend Times of Phy.Info”.
Regarding Huawei Power control Algorithm,its an enhanced power control algorithm which is based on Huawei Ⅱ powercontrol algorithm, alongwith exponential filtering, interpolation optimization, comprehensive decision, different thresholds and FH gain.
Please refer HED for more detailed description.
Do ask for any doubt.