In a wireless communication system, different services have different demands on Quality of Service (QoS), and the services can be classified into different categories according to the demands of the service on the QoS. For example, the services can be categorized into a Best Effort (BE) stream, an Assured Forwarding (AF) stream, and an Expedited Forwarding (EF) stream, in which the AF stream and the EF stream are jointly called as QoS streams.
In the above, the BE stream is able to stand a relatively higher end-to-end delay and has a low demand on Bit Error Rate (BER). For example, both File Transfer Protocol (FTP) (also called as File Download) and HyperText Transport Protocol (HTTP) (also called as Web Page Browsing) are BE streams.
The AF stream (e.g., a video stream generated from a video conference), similar to the BE stream, is able to stand a relatively higher end-to-end delay, but it has relatively high demands on the BER and minimum average throughput.
The EF stream has a relatively lower demand on the throughput, but has relatively higher demand on the end-to-end delay. For example, both a Voice over Internet Protocol (VoIP) service and a Video Telephone (VT) service are EF streams.
At present, multi-carrier technology is mainly used in a DOREVB system. When a subscriber requests multiple services simultaneously, the network side will assign a carrier for each of the QoS services; that is, bearing each of the QoS services on a single carrier, and use a same power control strategy to each of the services. Since different power control strategies are adopted for different services, if the network side still uses the same power control strategy for each of the services when the types of the requested multiple services are different, especially when QoS services and non-QoS services coexist, a waste of terminal resources will occur and the QoS will be affected.