Patent ID: 7353394
Filing Date: 2008-04-01
Classification: H04L,H04W,Y04S

Abstract:
1. A text messaging system for sending at least one text message to a wireless terminal equipment, the text messaging system comprising: means for storing an equipment identification number assigned to said wireless terminal equipment, wherein the equipment identification number is an International Mobile Equipment Identity (IMEI) number; means for generating a digital signature based on said assigned equipment identification number; and means for storing both the digital signature in an unallocated Information Element Data (IED) field and an indicator of a presence of the digital signature in a corresponding Information Element Identifier (IEI) field of an available Information Element (IE) group of a User Data Header (UDH) of the at least one text message, wherein the at least one text message is a Short Message Service (SMS) message comprising a SMS frame header and a SMS frame body, wherein the SMS frame body further comprises the UDH and a short message, further wherein the means for storing is independent of both a Subscriber Identity Module (SIM) card and a wireless network operator.