Hierarchical power control for OFDM based LTE system

3 GPP LTE has approved uplink intra-cell power control and defined overload indicator （OI） for uplink inter-cell power contrQ1 to mitigate the inter-cell interference （ICI）, respectively. In this pa- per, we propose a hierarchical power control （ HPC ） scheme where intra-eell and inter-cell power controls interact with each other. The inter-cell power control eommand is generated by radio re- source management （RRM） entity according to the ICI-load model together with the current ICI and served load information. This ICI-load model is proposed as a guideline for coordination among cells to enable the system to approach its system specific interference over thermal noise （IoT） work area. Simulation results show that for HPC scheme, the system＇ s IoT is well controlled to fit its pre-de- fined work area and the power efficiency is improved significantly. Our proposed scheme is also ro- bust to different settings of its inter-cell power control period.     

关于一类不可微非线性规划的约束品性

就一类在凸集C上目标函数为黎普希兹连续的带有可微不等式约束的非线性规划问题(P),在广义Kuhn-Tucker约束品性或广义Arrow-Hurwicz-Uzawa约束品性的条件下,研究了问题(P)的Kuhn-Tucker型必要条件.并且说明了当C为开集时相应的规划问题是问题(P)的特殊情况;目标函数为可微函数与凸函数的和时的相应的不可微非线性规划问题也是问题(P)的特殊情况;以及目标函数由黎普希兹连续的函数的商式构成的相应的分式规划问题也是问题(P)的特殊情况.