METHOD FOR REQUESTING, GENERATING AND DISTRIBUTING TRAFFIC ENCRYPTION KEY ACCORDING TO SERVICES IN WIRELESS PORTABLE INTERNET SYSTEM AND APPARATUS THEREOF, AND PROTOCOL CONFIGURATION METHOD IN THE SAME

摘要

The present invention relates to a service-specific traffic encryption key request, generation and distribution method and apparatus therefor, and a protocol configuration method in a wireless portable Internet system. The subscriber station transmits a key request message requesting a traffic encryption key for each service to the base station using a MAC message. The base station analyzes the key request message transmitted from the subscriber station to generate the requested traffic encryption key for each service. Thereafter, the base station transmits a key response message including the generated service-specific traffic encryption key to the subscriber station using the MAC message. At this time, if the key generation fails in the base station, the base station generates a key rejection message including the reason for the key generation failure and transmits it to the subscriber station. According to the present invention, the ability to assign traffic encryption keys for various services provided by the system can be supported, and as a result, many subscribers can be stably provided such as a multicast service or a broadcast service. Can be activated to promote the service.