| 摘要 |
In a multi-RAT network each radio network controller RNC or BSC calculates, together with the usual Cell Load Information Elements (IEs) for user traffic, also new Cell QoS IEs for each service or group of services or the whole services. Real Time (Streaming and Conversational) and Non RT (Interactive and Background) groups of services are considered separately for uplink and downlink. The IEs are exchanged over existing interfaces: Iu, Iur, Iur-g, A, etc. The range of each Cell QoS IE encompasses a number INTEGER Ä1..NÜ indicating Cell QoS levels ranging from a minimum to a maximum. A Cell QoS IE for service X is obtained by the linear quantization of a Cell Load Redundancy Factor for the service X calculated dividing an Actual Cell Load for the service X by a Minimum Required Cell Load for the service X, where: the Minimum Required Cell Load for the service X is a parameter that can be calculated in the network corresponding to the minimum user traffic load required in the cell in order to support the required services X with the minimum guaranteed QoS; the Actual Cell Load for the service X is a dynamic parameter corresponding to the measured user traffic load in the cell due to the service X. <??>RNCs or BSCs check the Cell QoS IEs to have supplementary indications, other than the Cell Load IEs, for issuing or preventing handovers or cell reselection commands towards neighbouring domains of the same or different RATs. In a particular embodiment a centralised RNC (CRRM) receives Cell Load and Cell QoS IEs from satellite RNCs (RRM) and supplies them with respective Cell QoS Targets in addition to the usual Cell Load Targets. Cell QoS Targets are defined in the same way than Cell QoS IEs. Each satellite RNC adapts the QoS of the cells to the received Cell QoS targets (fig.5). <IMAGE>
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