Patent ID: 8819157
Filing Date: 2014-08-26
Classification: H04L,H04W

Abstract:
1. A point-to-point chat system comprising: a processor; a USSD signaling interface means; a chat control means; and a short message interface means; wherein the USSD signaling interface means is adapted for receiving a USSD chat request message of an inviting party via a Home Location Register (HLR) in a core network, and forwarding the USSD chat request message to the chat control means; the chat control means is adapted for: allocating a chat session code and a chat data block, and notifying the short message interface means to send a chat inviting message to the invited party after receiving the USSD chat request message; the short message interface means is adapted for sending the chat inviting message to the invited party via a short message center (SMSC); the USSD signaling interface means is further adapted for receiving a USSD chat joining message from the invited party via the HLR in the core network, and forwarding the USSD chat joining message to the chat control means; the chat control means is further adapted for, according to the allocated chat session code and the allocated chat data block, starting chat between the inviting party and the invited party after receiving the USSD chat joining message; and for receiving chat information which is forwarded by the USSD signaling interface means and is from the inviting party via the HLR and sending the received chat information from the inviting party to the invited party via the USSD signaling interface means and the HLR in turn, and receiving other chat information which is forwarded by the USSD signaling interface means and is from the invited party via the HLR and sending the received other chat information from the invited party to the inviting party via the USSD signaling interface means and the HLR in turn; wherein, the USSD signaling interface means is further adapted for: decoding the USSD chat request message, the USSD chat joining message and the chat information, which are forwarded to the chat control means, to extract data above a Signaling Connection Control Part (SCCP) layer therefrom and then encapsulating to compose a complete USSD data packet correspondingly; and for encapsulating the chat information which is sent to the HLR, into related underlying signaling protocol at the corresponding SCCP layer based on the allocated chat session code.