A method and system for providing a short message service (SMS) between a
cellular mobile communication network and an IEEE 802.11 WLAN are
provided. To provide the SMS between the mobile communication network and
the WLAN, a short message gateway (SMGW) is further provided between
existing SS7 network and IP network. A mobile terminal (MT) connected to
the cellular network is allocated radio resources by a base transceiver
station (BTS). One or more BTSs are connected to a mobile switching
center (MSC) through a base station controller (BSC). The MSC is
connected to an SMS center (SMSC), a home location register (HLR), and
the SMGW through the SS7 network. An MT connected to the WLAN is
wirelessly connected to an access point (AP) and one or more APs are
connected to the IP network and the SMGW through an access router (AR).