Multiple carrier load balancing method

Abstract

The multiple carrier load balancing method is suitable for multiple carrier CDMA movable communication system. It includes judging whether the carriers will overload after the new call is added based on the present power of the carriers and the numbers of Walsh code channel resource; calculating the difference between the maximum power and the minimum power of the no-overload carriers and the difference between the maximum and the minimum of the Walsh channel resource; comparing with the power threshold and the Walsh channel resource threshold; and designating the new call to some carrier based on the comparison results. The present invention can ensure excellent carrier power balancing effect and reduce the carrier designating times.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a method for balancing the load of each carrier in a multi-carrier code division multiple access wireless communication system. Background technique [0002] Code Division Multiple Access (CDMA) is a multiple access modulation technique commonly used in mobile communications. When a single-carrier CDMA system reaches its capacity limit, multiple carriers need to be used to increase the system capacity, and each carrier can support multiple communication links. figure 1 A typical two-carrier CDMA cellular system structure diagram is given. The diagram shows the state when the two carriers of three adjacent base stations reach an ideal load balance, which is the goal that the load-balancing technology strives to achieve. In the figure, the dotted line indicates the coverage of the carrier f1, and the solid line indicates the coverage of the carrier f2. After the mobile station a...

AI Technical Summary

Problems solved by technology

[0010] In addition, there are some other load balancing methods, such as assigning new calls according to the increase of the reverse link receiving signal-to-noise ratio, assigning new calls between each carrier in turn, or according to the path loss of each mobile station. size to allocate carriers, but these methods cannot be practically applied due to poor balance or too much complexity

[0011] The methods discussed above are some absolute load balancing methods, which will lead to a large number of cross-carrier frequency allocation resources in practical applications.

Generally speaking, no matter what the situation is, the performance of the two carrier frequencies will be much lower than that of the single carrier frequency, especially when the two carrier frequencies are configured with control channels, the call success rate will drop significantly, as much as 4 to 5 percentage points

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