| 摘要 |
The disclosure discloses a method and an apparatus for transforming a working mode in a Cognitive Radio (CR) system, which are used for solving the technical problem that a subsystem maliciously occupies the spectrum resources which are temporarily unused by other system in a system adopting a CR technology. In the disclosure, a network side measures the demand degree of each cell on borrowed spectrum and sets a conditions of enabling and disabling the CR working mode to determine whether to perform working mode transformation on the cell and specify a network allocation method for a mobile terminal in a corresponding working mode, so as to coordinate the allocation of the spectrum resources, and avoid the abuse of the borrowed spectrum resources; the CR working mode of the cell with low demand degree is disabled by the network side; the borrowed spectrum resources of the cell are released; and therefore, more borrowed spectrum resources are available to the other cells having a higher demand degree on the borrowed spectrum, and the overall performance of the system is improved. |
| 主权项 |
1. A method of transforming a working mode in a Cognitive Radio (CR) system, comprising:
acquiring, by a network side, parameters of traffic or communication quality of a subordinate cell of the network side, and measuring, by the network side, a demand degree of the subordinate cell on borrowed spectrum resources; determining, by the network side, that the subordinate cell transforms a working mode when the demand degree of the subordinate cell on borrowed spectrum resources meets a condition for working mode transformation; and notifying, by the network side, a base station to execute a network allocation policy of a mobile terminal in a corresponding working mode; wherein the working mode comprise a normal working mode and a CR working mode, the CR working mode refers to a working mode of working at a system authorized spectrum and a borrowed spectrum at the same time and the normal working mode refers to a working mode of working at a system authorized spectrum; and the working mode transformation comprises: transforming from the normal working mode to the CR working mode, or transforming from the CR working mode to the normal working mode; wherein the executing a network allocation policy of a mobile terminal in a corresponding working mode by the base station comprises: when the CR working mode is transformed into the normal working mode, the base station commands a mobile terminal which has accessed a borrowed spectrum to switch to an authorized spectrum of the system, and a mobile terminal newly entering the subordinate cell accesses an authorized spectrum of the system; and when the normal working mode is transformed into the CR working mode, after the CR working mode is enabled, the base station applies for the borrowed spectrum and allocates the borrowed spectrum to an access link between a mobile terminal newly entering the subordinate cell and the base station, the mobile terminal newly entering the subordinate cell preferentially access the borrowed spectrum, and the mobile terminal which has accessed the authorized spectrum still uses the authorized spectrum. |
