A communication network access method and device

Abstract

Embodiments of the present invention provide a method and device for accessing a communication network, which relate to the field of communication technologies. The method is applied to a user terminal, and the method includes: receiving a first broadcast message sent by a target access network device, and first The broadcast message carries a set of competitive codes and a set of non-competitive codes; according to the set of competitive codes, the set of non-competitive codes and the pre-stored extension algorithm, the set of extended competitive codes is determined, and the set of extended competitive codes is composed of a set of competitive codes and a set of dedicated competitive codes ; Select the first target random access code in the dedicated contention code set, and send an access request message to the target access network device, where the access request message carries the first target random access code; if the first preset After receiving the access response message sent by the target access network device within the time period, access the communication network through the target access network device. The security of the private communication network can be improved by adopting the invention.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a communication network access method and device. Background technique [0002] Cellular communication refers to the communication method of cellular wireless networking, which divides the service area of ​​user terminals into multiple regular hexagonal cells, forming a structure that resembles a "cellular". A target access network device is set up in each cell to provide communication services for multiple user terminals in the cell. In each cell, physical random access channel (physical random access channel, PRACH) resources are divided according to the three dimensions of time, frequency, and code. For the same time-frequency PRACH resources, the cell usually uses code division to distinguish different user terminals. . The code division method is a user terminal distinction method that uses random access codes to distinguish different user terminals....

AI Technical Summary

Problems solved by technology

Therefore, user terminals that do not belong to the dedicated communication network (hereinafter referred to as ordinary user terminals) can also receive the broadcast message, obtain the contention code set of the dedicated communication network, and select a random access code from the contention code set to access the broadcast message. Dedicated communication network, resulting in less secure private communication network

Images