CN100525516C

3G

Title

Method and apparatus for performing mobile assisted hard handoff between communication systems

Application Number:

CN19971081396

Publication Date:

05-08-2009

Current Assignee:

Family ID:

Application Date:

19-12-1997

Declaring Company:

Publication Country:

US

Priority Date:

15-01-1997

Title

Method and apparatus for performing mobile assisted hard handoff between communication systems

Application Number:

CN19971081396

Family ID:

Publication Country:

US

Publication Date:

05-08-2009

Application Date:

19-12-1997

Priority Date:

15-01-1997

Current Assignee:

Declaring Company:

Abstract  Abstract

claims a method and device for performing hard switching system between the communication systems (S1 S2) or for inter-frequency hard handover in a CDMA system. The purpose of the invention is to reduce the probability of dropped calls when the system hard handoff. in the effort of hard handover failure case mobile station (18) sends the communication system of the invention uses information back to the original system (S1) to assist the switching carried out. or not intended to be switched mobile station (18) monitors the destination system (S2) then carries information for use in a subsequent handoff attempts return to the original system (S1). The information returned from monitoring a CDMA system of comprises searching one or more pilots of the result (these pilots given at offsets in a specific list provided to the mobile station (18) by the base station (B1-B5) or a set of offsets based upon a predetermined search algorithm.

A method and apparatus for performing inter-system hard handoff between communication systems (S1 S2) or inter-frequency hard handoff within a CDMA communication system is disclosed. The purpose of this invention is to reduce the probability of dropped calls during intersystem hard handoff. In the event that a hard handoff attempt is unsuccessful the mobile station (18) will return to the original system (S1) with information which the communication system of the present invention uses to assist in the performance of future handoff attempts. Alternatively with no handoff attempt made the mobile station (18) monitors the destination system (S2) then returns to the original system (S1) with information used to assist in subsequent handoff attempts. The information returned from monitoring a CDMA system consists of results of a search for one or more pilots given at offsets in a specific list provided to the mobile station (18) by the base station (B1-B5) or a set of offsets based upon a predetermined search algorithm.

A method and apparatus for performing inter-system hard handoff between communication systems (S1 S2) or inter-frequency hard handoff within a CDMA communication system is disclosed. The purpose of this invention is to reduce the probability of dropped calls during intersystem hard handoff. In the event that a hard handoff attempt is unsuccessful the mobile station (18) will return to the original system (S1) with information which the communication system of the present invention uses to assist in the performance of future handoff attempts. Alternatively with no handoff attempt made the mobile station (18) monitors the destination system (S2) then returns to the original system (S1) with information used to assist in subsequent handoff attempts. The information returned from monitoring a CDMA system consists of results of a search for one or more pilots given at offsets in a specific list provided to the mobile station (18) by the base station (B1-B5) or a set of offsets based upon a predetermined search algorithm.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.