Method for producing long code mask for cluster service

Abstract

This invention discloses a long code and mask generation method used in the cluster service including 1) when a MS having signed the cluster service opens an account, the cluster service discrimination ciphered key and shared ciphered data are stored separately at the MS and the network side, 2) The said MS sends a set calling request of ESN to the network containing set number and MS, 3) The network generates random number(RANDC) and broadcasts information to the set service zone containing RANDC, set number and ESN of MS uses same parameter and algorithm to compute the long code and mask.

Description

technical field [0001] The invention relates to a method for generating a long code mask in a code division multiple access (CDMA) 2000 system, in particular to a method for generating a long code mask for trunking services. Background technique [0002] The CDMA2000 standard belongs to one of the 3G system standard systems, and the CDMA2000 system provides users with voice and high-speed packet data services. According to the IS2000 protocol, the long code mask is used for channel physical layer parameter setting. Long code masks are divided into public long code masks and private long code masks. The former is usually generated when a mobile station (MS) initiates or accepts a call and is used to set traffic channel parameters; the latter is generally used during a call. In order to improve the confidentiality of the call, it is generated after the MS or the network side initiates a request to change the long code mask, and is used to reset the traffic channel parameters....

AI Technical Summary

Problems solved by technology

[0040] The methods for generating the above-mentioned public long code mask and private long code mask cannot meet the requirements of trunking services for channel sharing because the ESNs of each MS are different, and the long code masks calculated by users in the same group are different. need

[0041] It can be seen that the methods for generating public long code masks and private long code masks in the prior art cannot be directly used for setting traffic channel parameters in cluster services

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