METHOD AND APPARATUS FOR GENERATING SESSION KEYS

摘要

Nonce exchange (figure 2) with a target BS is performed even when the MS connected to the source BS so when the mobile reaches the new BS. it will be able to create a fresh key quickly. Alternately, the MS can provide the nonce directly to the target BS immediately (or very soon) upon handing over. In a similar manner, the mobile will require the target BS nonce via one of several techniques. In a first embodiment of the present invention the target BS will share the BS nonce with the source BS which will provide the nonce to the MS. In a second embodiment of the present invention the target BS will transmit the nonce over-the-air to the MS as part to the initial exchange leading to the set up of the wireless link between the MS and the target BS.