Cell selection device for wireless communication equipment
A cell selection device (D) is dedicated to a piece of wireless communication equipment (MS) arranged to establish radio communications with a radio communication network comprising radio communication cells and to receive data representative of the cell environment and of service capabilities of each cell of this environment from the network. This device (D) comprises a control means (CM) arranged, when its equipment (MS) needs to access a chosen network service, to access the data received by the equipment (MS) and representative of the cell environment and the corresponding cell service capabilities, to determine whether there is at least one cell in this environment that allows to access the network service, and to order the equipment (MS) either to pursue or to establish a radio communication with the network via a selected one of these determined cells if the selected cell allows at least one chosen radio parameter criterion to be satisfied.
1. Cell selection device for a piece of wireless communication equipment arranged to establish radio communications with a radio communication network comprising radio communication cells, and to receive data representative of a cell environment and of service capabilities of each cell of said environment from said network, characterized in that it comprises a control means arranged to access the data received by said equipment and representative of the cell environment and the corresponding cell service capabilities, when said equipment (MS) needs to access a chosen network service, to determine whether there is at least one cell in said environment that allows to access said network service, and orders said equipment either to pursue or to establish a radio communication with said network via a selected one of these determined cells if said selected cell allows at least one chosen radio parameter criterion to be satisfied, wherein said radio parameter comprises re-selection parameters C1 and C2, and in that said control means is arranged to compare a value C2s of the parameter C2 of the cell in which said mobile phone is located to each corresponding value C2ni of each neighboring cells offering said chosen network service, and then, if said value C2s exceeds each value C2ni added to a chosen threshold and if the value C1s of the parameter C1 of the cell in which said mobile phone is located exceeds 0, to select the neighboring cell that offers the best value C2ni.
2. Cell selection device according to claim 1 , characterized in that said radio parameter is a carrier level.
3. Cell selection device according to claim 2 , characterized in that said carrier level is a BCCH carrier level.
4. Cell selection device according to claim 1 , characterized in that said control means is arranged to store said data, received by said equipment and representative of the cell environment and cell service capabilities, and the associated radio parameters into a memory means.
5. Cell selection device according to claim 1 , characterized in that said control means is arranged to be set up to carry out a cell selection for a designated network service chosen in a group of at least two network services.
6. Cell selection device according to claim 1 , characterized in that said control means is arranged to carry out a cell selection for a chosen designated network service.
7. Cell selection device according to claim 1 , characterized in that said control means is arranged to automatically carry out a cell selection for one chosen network service.
8. Cell selection device according to claim 6 , characterized in that said chosen network service is defined by a user profile.
9. Cell selection device according to claim 1 , characterized in that said network services are supported by the GPRS standard and the EDGE and/or UMTS standard(s).
10. Wireless communication equipment for a radio communication network comprising radio communication cells, comprising a cell selection device according to claim 1 .
11. Wireless communication equipment according to claim 10 , characterized in that it comprises a man/machine interface coupled to said cell selection device and comprising a menu in which a user can navigate to enable or disable said cell selection device.
12. Wireless communication equipment according to claim 11 , characterized in that said menu is arranged to allow said user to set up said cell selection device.