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System-and-method-for-soft-handoff-setup-during-system-access-idle-handoff-in-a-wireless-network

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System and method for soft handoff setup during system access idle handoff in a wireless network

Details

Inventors: Dalal, Neerav N.;
Assignee: Samsung Electronics Co., Ltd. (Suwon, KR)
Primary Examiner: Vu; Huy D.
Assistant Examiner: Phan; Tri H.
Attorney, Agent or Firm:

There is disclosed, for use in a CDMA wireless network, a base station capable of performing a soft handoff of a mobile station while the mobile station is still in the process of first accessing the wireless network. The base station comprises a receiver for receiving from the mobile station a system access message that initiates in the wireless network a system access procedure that establishes a communications channel between the mobile station and the CDMA-based wireless network. The base station also comprises a handoff controller, coupled to the receiver and receiving the system access message therefrom. The handoff controller prepares another selected base station in the CDMA-based wireless network to take control over the system access procedure by sending a handoff control message that initiates in the selected base station a handoff procedure capable of assuming control over the system access procedure. This handoff procedure is speculatively initiated in anticipation of a later handoff by the mobile station.

DETAILED DESCRIPTION To address the above-discussed deficiencies of the prior art, it is a primary object of the present invention to provide, for use in a CDMA wireless network, a base station capable of wirelessly communicating with a mobile station.
According to one embodiment of the base station comprises a receiver capable of receiving a system access message transmitted by the mobile station, wherein the system access message initiates in the wireless network a system access procedure operable to establish a communications channel between the mobile station and the CDMA-based wireless network.
The base station also comprises a handoff controller, coupled to the receiver and receiving the system access message therefrom, the handoff controller capable of transferring control over the system access procedure from the base station to a first selected base station in the CDMA-based wireless network, wherein the handoff controller sends to the first selected base station a handoff control message operable to initiate in the first selected base station a handoff procedure capable of assuming control over the system access procedure.
The present invention therefore introduces the novel concept of speculatively initiating a handoff procedure to another base station without waiting for a message from the mobile station that initiates the handoff procedure.
This allows a handoff procedure to be performed more rapidly and allows the handoff procedure to be initiated while the mobile station is still in a system access state, rather than in a conversation state.
In one embodiment of the present invention, the system access message comprises signal strength indicia indicating a strength of at least one signal transmitted by at least one base station in the wireless network.
In another one embodiment of the present invention, the handoff controller sends the handoff control message to the first selected base station in response to a signal strength indicia in the system access message corresponding to a signal transmitted by the first selected base station

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