Patent granted in India to TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
patent number 375522 has been granted to TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)which is titled ACENTRALIZED KEY MANAGEMENT IN EMBMS. The patent applicant responded to this objection by stating that if the present invention provides a technical solution to a technical problem and has a technical effect then the same cannot be considered to fall under the category of algorithm or computer program per se. In light of such observation, the technical problem was formulated as how to distribute the MTKs and MSKs in large-scale MBMS deployments (i.e. split eMBMS) while keeping the key distribution traffic as low as possible. This patent falls under the category of Computer Science. Overall, this patent covers a split architecture eMBMS with distributed BMSCs providing the same eMBMS service allows for a centralized key service where each BMSC is able to derive a set of MTKs from the MSK using the MTK-IDs as the differentiating input. This avoids the need to send MTKs to the BMSCs.