Walsh code distribution method

Abstract

This invention discloses a distributing method for Walsh codes characterizing in including the following steps: a, determining the released Walsh codes in advance based on the delay judgment before finishing the burst of the service channel and releasing them in advance, b, distributing the Walsh codes based on the current idle Walsh codes and those released in step a to increase the time usability of code resources.

Description

A Walsh Code Assignment Method technical field The invention relates to the spread spectrum technology in the mobile communication system, in particular to a method for distributing Walsh codes. Background technique Walsh codes are often used in mobile communication systems. For example, in the modulation of the forward channel of a Code Division Multiple Access (CDMA, CodeDivisionMultipleAccess) system, the Walsh codes are used for spreading and are also used to distinguish each forward channel. Refers to the direction of the radio signal from the network side to the mobile station. In the radio signal carrier frequency sent by the network side, the Walsh codes corresponding to each forward channel must be orthogonal to each other to ensure correct decoding. Therefore, the network side needs to allocate and manage the carrier frequency Walsh codes. Generally, each carrier frequency has a Walsh code tree. Figure 1 is a schematic diagram of the Walsh code tree. In Figure 1...

AI Technical Summary

Problems solved by technology

The disadvantage of the prior art is that the Walsh code is not really used within the SCH start-up delay time, resulting in low time utilization of the Walsh code

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