INTER-FREQUENCY HANDOVER IN WIRELESS CDMA SYSTEMS

专利名称：INTER-FREQUENCY HANDOVER IN WIRELESS

CDMA SYSTEMS

发明人：HENON, Alexandre申请号：EP00985037.1申请日：20001110公开号：EP1195072B1公开日：20061018

摘要：In a method for inter-frequency handover of a mobile station from forward andreverse links with a current base station of a wireless cellular system to new forward andreverse links usually with a new base station utilizing a CDMA modulation type, droppedcalls are substantially eliminated by increasing spreading factor during the handover.Thus, a handover command is sent from the current base station to the mobile stationwhich identifies a new operating frequency, a final spreading factor, and a startingspreading factor which is at least double, and preferably at least four times, the finalspreading factor. The mobile station switches its operating frequency in accordance withthe identified new operating frequency, and establishes new forward and reverse linksfrom the mobile station at the new operating frequency and the identified startingspreading factor with the new base station. The mobile station then signals the new basestation that the handover is complete and the frame number of the detected frame. Thenew base station and the mobile station switch to the final spreading factor apredetermined number of frames after this frame number.

申请人：KONINKL PHILIPS ELECTRONICS NV

地址：NL

国籍：NL

代理机构：White, Andrew Gordon

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