Delivering method for wireless communication system
A technology of wireless communication system and wireless zone, applied in wireless communication, radio/inductive link selection and arrangement, electrical components, etc., can solve problems such as increased burden of wireless communication system, data interruption, heavy load of wireless communication system, etc.
Inactive Publication Date: 2008-12-31
BENQ CORP
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[0005] However, if the handover timing is determined only by the fixed signal power received by the mobile device 120 from the base station, unnecessary handovers will be caused, which will increase the burden on the wireless communication system
For example, the mobile device 120 may stay at the position P, and the signal power of the first signal received by the first base station is still sufficient to maintain good communication, if only because of the signal power of the second signal received by the second base station. If the power is slightly higher, switching will result in an increase in the number of switching times, resulting in a greater load on the wireless communication system.
In addition, if the signal power of the second signal received by the mobile device 120 from the second base station is greater than a fixed value, the handover is decided. may cause problems such as data interruption
Method used
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[0022] Please refer to figure 2 , which shows a flowchart of a handover method according to a preferred embodiment of the present invention, which is used in a wireless communication system. Please also refer to figure 1 . Initially, the mobile device 120 is located at position A and communicates via the first base station 101 , the first base station 101 sends out a first signal, and the second base station 111 sends out a second signal. The position D is the farthest reachable position of the signal of the first base station 101 , after the position D, the mobile device 120 can no longer receive the first signal of the first base station 101 . In other words, the signal power of the first signal of the first base station 101 received by the mobile device 120 at the position D is the minimum power value Pm. Handover must therefore take place before the mobile reaches position D.
[0023] First, store a minimum power value Pm in the mobile device 120 , as shown in step 21...
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A handover method for a wireless communication system is used to handover a mobile device from a first base station to a second base station. first. The mobile device is used to measure the first signal power between the mobile device and the first base station and the second signal power between the mobile device and the second base station. Then, the first signal power and the second signal power are compared, and if they are substantially the same, equal signal power is generated accordingly. Next, a switching power value is generated, which is between the equal signal power and the lowest power value. When the mobile device detects that the signal power between the mobile device and the first base station is the switching power value, the mobile device is switched to the second base station.
Description
technical field [0001] The present invention relates to a handover method, and in particular to a handover method for a wireless communication system. Background technique [0002] Please refer to figure 1 , which is a schematic diagram of a wireless communication system. The wireless communication system 100 is, for example, a GSM system, a CDMA system or a wireless LAN, etc., and includes a coverage area (cell) 102 of a first base station 101 and a coverage area (cell) 112 of a second base station 111 . The wireless communication system 100 is used to provide a mobile device 120 to surf the Internet or communicate wirelessly. The mobile device 120 is, for example, a mobile phone or a portable device such as a notebook computer with wireless Internet access, a personal digital assistant (personal digital assistant, PDA), and the like. [0003] Assume initially that the mobile device 120 is located at location A and communicates via the first base station 101 , the first ...
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IPC IPC(8): H04Q7/20H04Q7/38H04W36/08H04W36/30
Inventor 叶品絜
Owner BENQ CORP