Abstract
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.
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| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
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S1
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Specification Information
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Family Information
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SEP Database
Augmented SEP Database
There is no augmented declaration available yet
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Yes | Basis Patent | |||
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S1
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Yes | Family Member | |||
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S1
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Yes | Family Member | |||
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S1
S2
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Yes | Family Member | |||
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S1
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S1
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Yes | Family Member | |||
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S1
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Yes | Family Member | |||
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S1
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Yes | Family Member | |||
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S1
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No | Family Member | |||
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S1
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No | Family Member | |||
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Yes | Family Member | |||
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S1
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S1
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No | Family Member | |||
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S1
S2
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No | Family Member | |||
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S1
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No | Family Member | |||
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S1
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No | Family Member | |||
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S1
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No | Family Member | |||
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No | Family Member | |||
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S1
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No | Family Member | |||
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S1
S2
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No | Family Member | |||
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S1
S2
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No | Family Member | |||
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S1
S2
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No | Family Member | |||
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S1
S2
|
No | Family Member | |||
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S1
S2
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No | Family Member | |||
| EA199900660A1 | ----- | ----- | ----- | ----- | ----- | ----- | ----- | |||
| TR199901658T2 | ----- | ----- | ----- | ----- | ----- | ----- | ----- | |||
| ZA9882B | ----- | ----- | ----- | ----- | ----- | ----- | ----- | |||
| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
| ----- | ----- | ----- | ----- | ----- |
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----- | ----- | ----- | ----- | |||
Technologies
Broadcast/Multicast
Product
Not Available
Use Cases
Network OptimizationWireless communication
Services
Not Available
Claim
1. In a wireless communication system wherein a mobile station is moving from the coverage area of an origination system into the coverage area of a destination system and wherein a first attempt to acquire said destination system has failed, a method for avoiding lost communication with said mobile station, comprising the steps of: transmitting from said mobile station to said origination system a set of parameter data; receiving at said origination system said parameter data; generating at said origination system a search list in accordance with said parameter data; and attempting by said mobile station to acquire said destination system in accordance with said second search list.
2. The method of Claim 1 further comprising the step of measuring said parameter data at said mobile station.
3. The method of Claim 2 wherein said step of measuring said parameter data comprises measuring the signal energy of pilot signals of said destination system.
4. The method of Claim 2 wherein said step of measuring said parameter data is performed in accordance with a predetermined set of search parameters.
5. The method of Claim 4 wherein said set of search parameters is transmitted to said mobile station by said origination system.
6. The method of Claim 1 further comprising transmitting said search list from said origination system to said mobile station.
7. In a wireless communication system wherein a mobile station is moving from the coverage area of an origination system into the coverage area of a destination system, a method for providing handoff from said origination system to said destination system, comprising the steps of: transmitting from said origination system to said mobile station a set of search parameter data; determining at said mobile station the availability of said destination system in accordance with said set of parameter; transmitting from said mobile station to said origination system a message indicative of the availability of said destination system; generating at said origination system a set of acquisition parameters in accordance with said message from said mobile station; attempting at said mobile station to acquire said destination system in accordance with said set of acquisition parameters.']
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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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.
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