US Patent 11470023 Session initiation method and device

Disclosed is an automatic telephonic session initiation method performed at a telephone session server including: receiving a telephonic session reservation request from a telephonic session client of a first terminal, the telephonic session reservation request including an identifier of an instant messaging client of a second terminal and a telephonic session initiation condition; storing corresponding reservation information according to the telephonic session reservation request; sending the reservation information to the instant messaging client of the second terminal according to the identifier of the instant messaging client of the second terminal; receiving a telephonic session reservation feedback message from the instant messaging client of the second terminal; and sending a telephonic session initiation request to the telephonic session client of the first terminal and a telephonic session client of the second terminal according to the reservation information when the telephonic session initiation condition is satisfied.