TH30253A - Linking multi-functional endpoints to mobile networks - Google Patents

Abstract

DC60 (22/05/41) This invention describes a method for delivering and selecting base stations to link multi-system terminals (PP/MS) in a mobile communications system, which consists of an MSC (Main Service Center), at least one first base station (BTS), and at least one second base station (RFP) controlled by the MSC, and also includes a multi-system terminal (PP/MS) component. The delivery method consists of the following steps: acknowledging that the radio link between the serving second base station (RFP) and the multi-system terminal (PP/MS) is poor; selecting one base station from among several first base stations as the target cell for delivery using measurements taken at the multi-system terminal (PP/MS) as a criterion; and performing delivery from the serving second base station (RFP) to one of the selected first base stations (BTS). The delivery method described in this invention is unique in that the multi-system terminal... The PP/MS terminal receives cell details via a second base station (RFP). These cell details include information about the frequency of at least one first base station (BTS) located in the same geographic area as the terminal. The base station signal is then measured at the PP/MS terminal using the frequency specified in the cell details as a criterion when the current radio link is known to be poor. This base station selection method is characterized by the PP/MS terminal receiving the correct cell details via the second base station (RFP), and one of the first base stations (BTSs) is selected at the PP/MS terminal as the base station to listen to when switching to the service of one of the first base stations (Figure 1a). This invention describes the method of delivering and selecting base stations to link multiple PP/MS terminals in a mobile communication system, which will consist of: The MSC center has at least one first base station (BTS) and at least one second base station (RFP) controlled by the MSC, and also has a multi-system terminal (PP/MS) component. The delivery method consists of the following steps: Acknowledging that the radio link between the serving second base station (RFP) and the multi-system terminal (PP/MS) is poor; selecting one base station from among several first base stations as the target cell for delivery using the measurements taken at the multi-system terminal (PP/MS) as a criterion; and carrying out delivery from the serving second base station (RFP) to one of the selected first base stations (BTS). A unique characteristic of this delivery method is that the multi-system terminal (PP/MS) receives cell details via the second base station (RFP). These cell details include information about the frequency of... At least one first base station (BTS) located in the same geographic area as the terminal station is located, measures the base station signal in the multi-system terminal (PP/MS) using the frequency specified in the cell details as a criterion when the current radio link is known to be poor. A unique feature of this base station selection method is that the multi-system terminal (PP/MS) receives the correct cell details via a second base station (RFP), and one first base station (BTS) is selected in the multi-system terminal (PP/MS) as the base station that the multi-system terminal (PP/MS) will listen to when switching to one of the first base stations.

Claims (12)

1. The delivery method in a mobile communication system, comprising one MSC (Mobile Communication Center), at least one primary base station (BTS), and at least one secondary base station (RFF) controlled by the MSC, and a multi-system terminal (PP/MS) consisting of a mobile (MS) component radio-linked to the primary base station (BTS) and a wireless (PP) component radio-linked to the secondary base station (RFF), involves the following steps: Recognizing poor radio linkage between the operating secondary base station (RFF) and the multi-system terminal (PP/MS); selecting a primary base station as the target cell for delivery, based on measurements taken at the multi-system terminal; and delivering from the operating secondary base station to the selected primary base station. This delivery method further includes the following steps: Transmitting cell details containing frequency information of at least one primary base station located within the geographical area of the destination to the multi-system terminal. (PP/MS) via a second base station (RFP), the signal of the base station in the multi-system terminal (PP/MS) is measured at the frequency specified in the cell specifications. When a poor radio link is detected, 2. The method under Claim 1, by which cell details are transmitted to the multi-system terminal (PP/MS) as an attachment to the normal network transmission message. 3. Methods under claims 1 or 2, in which case the multi-system terminal (PP/MS) would receive details of a cell containing information about the frequency of the first base station (BTS). 4. By any one of the claims 1, 2, or 3, the details of the cells received at the multi-system terminal (PP/MS) will be stored in the terminal's memory. 5. Method under Claim 4: By this method, the measurement of the base station signal in a multi-system terminal where the currently operating radio link is deemed poor consists of the following steps: Read the cell details stored in the terminal's memory; switch to the mobile (MS) segment of the multi-system terminal; align the mobile (MS) segment of the terminal with the frequency specified in the cell details read from the memory; and measure the base station signal at the frequency specified in the cell details. 6. The method for selecting a base station for multi-system (PP/MS) terminal linking in a mobile communication system consists of one MSC (Multi-System Communication Center), at least one first base station (BTS), and at least one second base station (RFP), which is controlled by the MSC. The multi-system (PP/MS) terminal section has a mobile phone (MS) section that is radio-linked to the first base station (BTS) and a wireless phone (PP) section that is radio-linked to the second base station (RFP). The method involves the following steps: Transmitting cell details containing frequency information of at least one first base station located in the geographical area of the multi-system (PP/MS) terminal via the second base station (RFP); and selecting one first base station (BTS) from among the selected base stations in the multi-system (PP/MS) terminal using the transmitted cell details as a criterion, to be the base station for the multi-system terminal. (PP/MS) will also be listening to determine when it's necessary to switch to one of the primary base stations. 7. Method under Claim 6: By this method, it is recognized that the radio signal of the second base station received by the multi-system terminal (PP/MS) is poor. The base station signal is measured at the multi-system terminal at the frequency specified in the cell specifications. When it is recognized that the radio signal of the second base station (RFP) received by the multi-system terminal (PP/MS) is poor, one base station (BTS) is selected as the base station that the multi-system terminal (PP/MS) will receive from, using the measurement results performed at the multi-system terminal (PP/MS) as a criterion. 8. Method according to claim 6 or 7: In this method, cell details are sent to the multi-system terminal (PP/MS) as an attachment to the normal network transmission message. 9. By means of either claim 6, 7, or 8, the multi-system terminal (PP/MS) will receive details of a cell containing information about the frequency of one of the first stations (BTS). 10. By any means under any of the claims 6 through 9, the details of the cells received at the multi-system terminal (PP/MS) are stored in the terminal's memory slot. 11. Method under Claim 10: By this method, when measuring the base station signal in a multi-system terminal, and determining that the currently operating radio link is poor, the following steps shall be taken: Read the cell details stored in the terminal's memory; Switch to the mobile (MS) segment of the multi-system terminal; Adjust the mobile (MS) segment of the terminal to match the frequency specified in the cell details read from the memory; and 12. The adapted multi-system terminal is intended to operate in a mobile communication system consisting of at least one first base station (BTS) and at least one second base station (RFP), which are base stations of the wireless telephone system. In this system, the multi-system terminal will include a device that stores frequency information of at least one first base station (BTS) transmitted from the second base station (RFP), and a device that selects the base station which the multi-system terminal will listen to using the stored frequency information as a criterion. (Clause 12, page 3, figure 8)