| 摘要 |
<p>Every controller (RNC, BSC, E-NodeB, BS) of multi-RAT PLMN (UTRAN, GERAN, LTE, WiMAX) calculates for each controlled cell a MUB IE describing the availability of transport services in terms of maximum user bitrate that can currently be allowed to each transport service, separately for UL and DL, needed to plan usage of radio resources in the current and neighbouring cells, such as for handovers, cell reselections and new service setups. The MUB computation avails of:
-calculating an available capacity for a given service by taking a normalised capacity accessible to said service and by subtracting to it a normalized load of said service and of any other service that cannot be pre-empted by said service;
-calculating the MUBN for said service as the minimum between said available capacity and the maximum capacity MAXUB allowed to the single user for said service as a configuration setting;
-calculating a quantized representation MUB of the MUBN for said service as the nearest power of two raised at an integer n. The MUB is included into management messages forwarded to the other controllers, either of the same or different technologies. Every controller checks the received MUB coming from the other controllers in order to decide on the most suited target cell, among the current and neighbouring cells, for resource management issues such as handover, cell reselection, and new service setup ( fig.6 ).</p> |
