Communication encryption and decryption method for wireless broadband network

Abstract

The invention discloses a communication encryption and decryption method for a wireless broadband network. The encryption method comprises the following steps: A. Push-To-Talk (PTT) voice communication is carried out through a trunking multimode smart terminal, and an encryption button connected with an input module is pressed prior to or at the time of the sending of a call request; B. the trunking multimode smart terminal starts an encryption / decryption module through a microprocessor to carry out encryption processing of the call request; C. a user sends voice information to a baseband processing module through a transmitter, and voice encoded data which has been subjected to baseband processing is sent to a radio frequency transceiving module; and D. the voice encoded data which has been subjected to baseband processing is encrypted through the encryption / decryption module, and the encrypted data is sent through the radio frequency transceiving module via an antenna. The encryption and decryption method provided by the invention has the advantages that communication processes among multimode smart terminals as well as between the multimode smart terminal and a base station can be encrypted, so that the security of Police Digital Trunking (PDT) system communication is ensured, and the requirements of trunking users for voice and audio / video transmission and encrypted transmission of data information are satisfied.

Description

technical field [0001] The invention relates to a fusion technology of a wireless broadband network and a police digital trunking (PDT) system, in particular to a communication encryption and decryption method of a wireless broadband network. Background technique [0002] At present, there are four existing digital trunking communication standards in my country: Terrestrial Trunking Radio System (Tetra) in Europe, Iden in the United States, and GOTA and GT800 of ZTE and Huawei in my country. The two domestic standards are improved on the basis of the public network, and cannot meet the needs of professional users in terms of network access time and off-network direct connection. Iden in the United States is also improved from the public network, and has the same problem. Only Tetra can meet the needs of professional users including police. However, the European Tetra standard has problems such as small coverage area, high network construction cost, inability to interconnec...

AI Technical Summary

Problems solved by technology

However, the European Tetra standard has problems such as small coverage area, high network construction cost, inability to interconnect equipment from different manufacturers, difficulty in compatibility with analog systems, encryption interface not open to China, and excessive foreign patent barriers.

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