Carrier selecting method of multi-carrier system

Abstract

The invention discloses a carrier selecting method of a multi-carrier system, comprising the following steps that: a base station judges whether other full-allocation carriers exist besides a currently-working full-allocation carrier of a terminal in the multi-carrier system according to the allocation condition of a plurality of carriers in the multi-carrier system; if other full-allocation carriers exist, the base station selects one of other full-allocation carriers as a target secondary carrier of the terminal, and sends the instruction carried with the target secondary carrier to the terminal; and the terminal is switched to the target secondary carrier according to the received instruction. By applying the invention and selecting the target secondary carrier of the terminal as the full-allocation carrier, the terminal can maintain the control thereof by the base station by the broadcast of the full-allocation carriers and control channels, and does not need to return a main carrier thereof to receive control information of the base station under regular time or irregular time, thus avoiding signaling cost generated when carrying out carrier switching, reducing energy loss of the terminal and maintaining the continuity of service transmission.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a carrier selection method of a multi-carrier system. Background technique [0002] With the rapid development of communication technology, the mobile WiMAX (Worldwide Interoperability for Microwave Access) system based on the IEEE 802.16e (Institute of Electrical and Electronics Engineers 802.16e) air interface standard can no longer meet people's high demand for broadband mobile communications in the future. Requirements for transmission rate, high throughput, fast movement and low latency. Currently, the TGM task group of the IEEE 802.16 working group is working on promoting the evolution from 802.16e to 802.16m, so as to support higher peak rates, higher spectral efficiency and sector capacity. [0003] For mobile broadband communication systems, in order to improve spectrum utilization and provide efficient services, it is the application of continuous / discontinuous spe...

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Problems solved by technology

[0016] Therefore, the current problem that needs to be solved is that if the operation from the auxiliary carrier to the main carrier or from the main carrier to the auxiliary carrier is frequently performed, the energy consumption of the terminal will be greatly increased and it is not conducive to the terminal to maintain normal and continuous services; in addition, for the carrier Handover, when the terminal switches from the primary carrier to the secondary carrier, it will no longer maintain a physical connection with its primary carrier. At this time, the problem of how the terminal and the base station interact with control information is also a problem that needs to be solved at present

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