Patent US5203010A successfully refreshed from Google Patents.
US5203010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio telephone system incorporating multiple time periods for communication transfer
Assignee: Motorola Solutions Inc
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Filing: 1990-11-13
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Granted: 1993-04-13
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Expires: 2010-11-13
Abstract
Abstract A cellular radiotelephone system transfers a call from a source base-site (200) to one target base-site (205,210). A source base-site (200) in the first RF coverage area (100) measures the signal strength (RSSI S ) of a mobile (225), provides a forecasted signal strength (RSSI F ) representing a would-be power increase of the mobile (225) and sets up two time windows. The source base-site (200) sends the measured and forecasted signal strengths to candidate target base-sites (205,210) found by the mobile (225) which measure the mobile (225) signal strength (RSSI T ) and compare it once to RSSI S plus a hysteresis value. If RSSI T is greater than RSSI S , the call is transferred to the best responding cell. If RSSI T is below RSSI S , RSSI T is compared to RSSI F . During this time, the mobile 225 will increase power at the end of the first time window. If RSSI T is ever greater than RSSI F at any of the candidate target base-sites (205,210), the call is transferred to the responding target base-site (205,210). If the source base-site (200) receives no responses during the second time window, the process ends.
Inventors
- 👤 Kenneth A. Felix
- 👤 Alton P. Werronen
- 👤 Thomas B. Hart
- 👤 Scott A. Hardman
- 👤 Thomas G. Hulsebosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/24; H04W36/30; H04W36/302
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
192 words
A radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a selected one target base-site, the radiotelephone system comprising: means, at the source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, at the source base-site, for providing a second signal quality value; means, at the source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, the selected one target base-site, for obtaining a third signal quality value of said signal when received by the selected one target base-site; means, at the selected one target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; and means, responsive to said means for comparing, for transferring communication from the source base-site to the selected one target base-site during at least either said first predetermined time period or said second predetermined time period.
Claim 2
Dependent Claim
192 words
A radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a selected one target base-site, the radiotelephone system comprising: means, at the source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, at the source base-site, for providing a second signal quality value; means, at the source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, the selected one target base-site, for obtaining a third signal quality value of said signal when received by the selected one target base-site; means, at the selected one target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; and means, responsive to said means for comparing, for transferring communication from the source base-site to the selected one target base-site during at least either said first predetermined time period or said second predetermined time period.
Claim 3
Dependent Claim
38 words
The radiotelephone system of claim 1 wherein said means for obtaining a first signal quality value further comprises means for providing a hysteresis value correlating the physical location of the source base-site and the selected one target base-site.
Claim 4
Dependent Claim
34 words
The radiotelephone system of claim 2 wherein said means for comparing further comprises means for responding when said third signal quality value is greater than said first signal quality value plus said hysteresis value.
Claim 5
Dependent Claim
30 words
The radiotelephone system of claim 1 wherein said means for comparing further comprises means for responding when said third signal quality value is greater than said second signal quality value.
Claim 6
Dependent Claim
253 words
A radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the radiotelephone system comprising: means, at the source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, at the source base-site, for providing a second signal quality value; means, at the source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, at the selected one target base-site, for obtaining a third signal quality value of a signal when received by the selected one target base-site; means, at the selected one target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; means, coupled to said means for comparing, for responding during said first predetermined time period when said third signal quality value is greater than said first signal quality value and for responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; means, coupled to said means for responding, for monitoring said responses; and means, responsively coupled to said means for monitoring, for transferring communication from the source base-site to the selected one target base-site.
Claim 7
Dependent Claim
253 words
A radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the radiotelephone system comprising: means, at the source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, at the source base-site, for providing a second signal quality value; means, at the source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, at the selected one target base-site, for obtaining a third signal quality value of a signal when received by the selected one target base-site; means, at the selected one target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; means, coupled to said means for comparing, for responding during said first predetermined time period when said third signal quality value is greater than said first signal quality value and for responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; means, coupled to said means for responding, for monitoring said responses; and means, responsively coupled to said means for monitoring, for transferring communication from the source base-site to the selected one target base-site.
Claim 8
Dependent Claim
29 words
The radiotelephone system of claim 5 further comprising means for providing a plurality of mobile unit signal level increase values, including a first mobile unit signal level increase value.
Claim 9
Dependent Claim
40 words
The radiotelephone system of claim 6 wherein said means for providing a plurality of mobile unit signal level increase values further comprises means for altering the predetermined signal level by at least said first mobile unit signal level increase value.
Claim 10
Dependent Claim
29 words
The radiotelephone system of claim 7 wherein said means for altering further comprises means for altering the predetermined signal level at the end of said first predetermined time period.
Claim 11
Dependent Claim
41 words
The radiotelephone system of claim 5 wherein said means for providing a second signal quality value further comprises means for calculating said second signal quality value from the first signal quality value and a first mobile unit signal level increase value.
Claim 12
Dependent Claim
265 words
A radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the radiotelephone system comprising: means, at the source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, at the source base-site, for providing a second signal quality value; means, at the source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, at the source base-site, for receiving information from the mobile unit; means, at the selected one target base-site, for obtaining a third signal quality value of a signal when received by the selected one target base-site; means, at the selected one target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; means, coupled to said means for comparing, for responding during said first predetermined time period when said third signal quality value is greater than said first signal quality value and for responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; means, coupled to said means for responding, for monitoring said responses; and means, responsively coupled to said means for monitoring, for transferring communication from the source base-site to the selected one target base-site.
Claim 13
Dependent Claim
265 words
A radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the radiotelephone system comprising: means, at the source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, at the source base-site, for providing a second signal quality value; means, at the source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, at the source base-site, for receiving information from the mobile unit; means, at the selected one target base-site, for obtaining a third signal quality value of a signal when received by the selected one target base-site; means, at the selected one target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; means, coupled to said means for comparing, for responding during said first predetermined time period when said third signal quality value is greater than said first signal quality value and for responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; means, coupled to said means for responding, for monitoring said responses; and means, responsively coupled to said means for monitoring, for transferring communication from the source base-site to the selected one target base-site.
Claim 14
Dependent Claim
22 words
The radiotelephone system of claim 10 wherein said information received by said means for receiving further comprises the selected one target base-site.
Claim 15
Dependent Claim
29 words
The radiotelephone system of claim 10 further comprising means for providing a plurality of mobile unit signal level increase values, including a first mobile unit signal level increase value.
Claim 16
Dependent Claim
40 words
The radiotelephone system of claim 12 wherein said means for providing a plurality of mobile unit signal level increase values further comprises means for altering the predetermined signal level by at least said first mobile unit signal level increase value.
Claim 17
Dependent Claim
29 words
The radiotelephone system of claim 13 wherein said means for altering further comprises means for altering the predetermined signal level at the end of said first predetermined time period.
Claim 18
Dependent Claim
41 words
The radiotelephone system of claim 10 wherein said means for providing a second signal quality value further comprises means for calculating said second signal quality value from the first signal quality value and a first mobile unit signal level increase value.
Claim 19
Dependent Claim
216 words
A base-site apparatus communicating to a mobile unit in a radiotelephone system, the mobile unit requiring a transfer of communication from the base-site apparatus to another base-site apparatus, the base-site apparatus comprising: means, when the base-site apparatus is a source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, when the base-site apparatus is a source base-site, for providing a second signal quality value; means, when the base-site apparatus is a source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, when the base-site apparatus is a target base-site, for obtaining a third signal quality value of said signal when received by the selected one target base-site; means, when the base-site apparatus is a target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; and means, responsive to said means for comparing, for transferring communication from the base-site apparatus that is a source base-site to the base-site apparatus that is a target base-site during at least either said first predetermined time period or said second predetermined time period.
Claim 20
Dependent Claim
216 words
A base-site apparatus communicating to a mobile unit in a radiotelephone system, the mobile unit requiring a transfer of communication from the base-site apparatus to another base-site apparatus, the base-site apparatus comprising: means, when the base-site apparatus is a source base-site, for obtaining a first signal quality value of a signal when received by the source base-site; means, when the base-site apparatus is a source base-site, for providing a second signal quality value; means, when the base-site apparatus is a source base-site, for providing at least a first predetermined time period and a second predetermined time period; means, when the base-site apparatus is a target base-site, for obtaining a third signal quality value of said signal when received by the selected one target base-site; means, when the base-site apparatus is a target base-site, for comparing said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; and means, responsive to said means for comparing, for transferring communication from the base-site apparatus that is a source base-site to the base-site apparatus that is a target base-site during at least either said first predetermined time period or said second predetermined time period.
Claim 21
Dependent Claim
48 words
The base-site apparatus of claim 16 wherein said means for obtaining a first signal quality value further comprises means for providing a hysteresis value correlating the physical location of the base-site apparatus that is a source base-site and at least the base-site apparatus that is a target base-site.
Claim 22
Dependent Claim
34 words
The base-site apparatus of claim 17 wherein said means for comparing further comprises means for responding when said third signal quality value is greater than said first signal quality value plus said hysteresis value.
Claim 23
Dependent Claim
30 words
The base-site apparatus of claim 16 wherein said means for comparing further comprises means for responding when said third signal quality value is greater than said second signal quality value.
Claim 24
Independent Claim
195 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a selected one target base-site, the method comprising: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; estimating a second signal quality value; obtaining, at the selected one target base-site, a third signal quality value of said signal when received by the selected one target base-site; comparing, at the selected one target base-site, said first signal quality value to said third signal quality value during a first time period; transferring communication, responsive to said first step of comparing, from the source base-site to the selected one target base-site if said third signal quality value is preferable over said first signal quality value; comparing, at the target base-site, said second signal quality value to said third signal quality value during a second time period; and transferring communication, responsive to said second step of comparing, from the source base-site to the target base-site if said third signal quality value is preferable over said second signal quality value.
Claim 25
Independent Claim
195 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a selected one target base-site, the method comprising: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; estimating a second signal quality value; obtaining, at the selected one target base-site, a third signal quality value of said signal when received by the selected one target base-site; comparing, at the selected one target base-site, said first signal quality value to said third signal quality value during a first time period; transferring communication, responsive to said first step of comparing, from the source base-site to the selected one target base-site if said third signal quality value is preferable over said first signal quality value; comparing, at the target base-site, said second signal quality value to said third signal quality value during a second time period; and transferring communication, responsive to said second step of comparing, from the source base-site to the target base-site if said third signal quality value is preferable over said second signal quality value.
Claim 26
Dependent Claim
38 words
The method of claim 20 wherein said step of obtaining a first signal quality value further comprises the step of providing a hysteresis value correlating the physical location of the source base-site and the selected one target base-site.
Claim 27
Dependent Claim
35 words
The method of claim 21 wherein said first step of comparing further comprises the step of responding when said third signal quality value is greater than said first signal quality value plus said hysteresis value.
Claim 28
Dependent Claim
31 words
The method of claim 20 wherein said second step of comparing further comprises the step of responding when said third signal quality value is greater than said second signal quality value.
Claim 29
Independent Claim
243 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the method comprising: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; providing, at the source base-site, a second signal quality value; providing, at the source base-site, at least a first predetermined time period and a second predetermined time period; obtaining, at at least the selected one target base-site, a third signal quality value of a signal when received by at least the selected one target base-site; comparing, at the selected one target base-site, said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; responding, coupled to said step of comparing, during said first predetermined time period when said third signal quality value is greater than said first signal quality value and responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; monitoring responses from said step of responding; and transferring communication, in response to said step of monitoring, from the source base-site to the selected one target base-site.
Claim 30
Independent Claim
243 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the method comprising: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; providing, at the source base-site, a second signal quality value; providing, at the source base-site, at least a first predetermined time period and a second predetermined time period; obtaining, at at least the selected one target base-site, a third signal quality value of a signal when received by at least the selected one target base-site; comparing, at the selected one target base-site, said first signal quality value to said third signal quality value during said first predetermined time period and for comparing said second signal quality value to said third signal quality value during said second predetermined time period; responding, coupled to said step of comparing, during said first predetermined time period when said third signal quality value is greater than said first signal quality value and responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; monitoring responses from said step of responding; and transferring communication, in response to said step of monitoring, from the source base-site to the selected one target base-site.
Claim 31
Dependent Claim
29 words
The method of claim 24 further comprising the step of providing a plurality of mobile unit signal level increase values, including a first mobile unit signal level increase value.
Claim 32
Dependent Claim
40 words
The method of claim 25 wherein said step of providing a plurality of mobile unit signal level increase values further comprises the step of altering the predetermined signal level by at least said first mobile unit signal level increase value.
Claim 33
Dependent Claim
29 words
The method of claim 26 wherein said step of altering further comprises the step of altering the predetermined signal level at the end of said first predetermined time period.
Claim 34
Dependent Claim
41 words
The method of claim 24 wherein said step of providing a second signal quality value further comprises the step of calculating said second signal quality value from the first signal quality value and a first mobile unit signal level increase value.
Claim 35
Independent Claim
248 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the method comprising: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; providing, at the source base-site, a second signal quality value; providing, at the source base-site, at least a first predetermined time period and a second predetermined time period; receiving, at the source base-site, information from the mobile unit; obtaining, at the selected one target base-site, a third signal quality value of a signal when received by the selected one target base-site; comparing, at the selected one target base-site, said first signal quality value to said third signal quality value during said first predetermined time period and comparing said second signal quality value to said third signal quality value during said second predetermined time period; responding, coupled to said step of comparing, during said first predetermined time period when said third signal quality value is greater than said first signal quality value and responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; monitoring responses from said step of responding; and transferring communication, in response to said step of monitoring, from the source base-site to the selected one target base-site.
Claim 36
Independent Claim
248 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site at a predetermined signal level, the source base-site having requested a transfer of communication of the mobile unit from the source base-site to a selected one target base-site, the method comprising: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; providing, at the source base-site, a second signal quality value; providing, at the source base-site, at least a first predetermined time period and a second predetermined time period; receiving, at the source base-site, information from the mobile unit; obtaining, at the selected one target base-site, a third signal quality value of a signal when received by the selected one target base-site; comparing, at the selected one target base-site, said first signal quality value to said third signal quality value during said first predetermined time period and comparing said second signal quality value to said third signal quality value during said second predetermined time period; responding, coupled to said step of comparing, during said first predetermined time period when said third signal quality value is greater than said first signal quality value and responding during said second predetermined time period when said third signal quality value is greater than said second signal quality value; monitoring responses from said step of responding; and transferring communication, in response to said step of monitoring, from the source base-site to the selected one target base-site.
Claim 37
Dependent Claim
21 words
The method of claim 29 wherein said information received by said step of receiving further comprises the selected one target base-site.
Claim 38
Dependent Claim
29 words
The method of claim 29 further comprising the step of providing a plurality of mobile unit signal level increase values, including a first mobile unit signal level increase value.
Claim 39
Dependent Claim
38 words
The method of claim 31 wherein said step of providing a plurality of mobile unit signal level increase values further comprises the step of altering the predetermined signal level by said first mobile unit signal level increase value.
Claim 40
Dependent Claim
29 words
The method of claim 32 wherein said step of altering further comprises the step of altering the predetermined signal level at the end of said first predetermined time period.
Claim 41
Dependent Claim
41 words
The method of claim 29 wherein said step of providing a second signal quality value further comprises the step of calculating said second signal quality value from the first signal quality value and a first mobile unit signal level increase value.
Claim 42
Independent Claim
207 words
A method of communication in a radiotelephone system having a base-site apparatus communicating to a mobile unit, the mobile unit requiring a transfer of communication from the base-site apparatus to another base-site apparatus, the method comprising: obtaining, when the base-site apparatus is a source base-site, a first signal quality vale of a signal when received by the source base-site; providing, when the base-site apparatus is a source base-site, a second signal quality value; providing, when the base-site apparatus is a source base-site, at least a first predetermined time period and a second predetermined time period; obtaining, when the base-site apparatus is a target base-site, a third signal quality value of a signal when received by the selected one target base-site; comparing, when the base-site apparatus is a target base-site, said first signal quality value to said third signal quality value during said first predetermined time period and comparing said second signal quality value to said third signal quality value during said second predetermined time period; and transferring communication, responsive to said step of comparing, from the base-site apparatus that is a source base-site to the base-site apparatus that is a target base-site during at least either said first predetermined time period or said second predetermined time period.
Claim 43
Independent Claim
207 words
A method of communication in a radiotelephone system having a base-site apparatus communicating to a mobile unit, the mobile unit requiring a transfer of communication from the base-site apparatus to another base-site apparatus, the method comprising: obtaining, when the base-site apparatus is a source base-site, a first signal quality vale of a signal when received by the source base-site; providing, when the base-site apparatus is a source base-site, a second signal quality value; providing, when the base-site apparatus is a source base-site, at least a first predetermined time period and a second predetermined time period; obtaining, when the base-site apparatus is a target base-site, a third signal quality value of a signal when received by the selected one target base-site; comparing, when the base-site apparatus is a target base-site, said first signal quality value to said third signal quality value during said first predetermined time period and comparing said second signal quality value to said third signal quality value during said second predetermined time period; and transferring communication, responsive to said step of comparing, from the base-site apparatus that is a source base-site to the base-site apparatus that is a target base-site during at least either said first predetermined time period or said second predetermined time period.
Claim 44
Dependent Claim
46 words
The method of claim 35 wherein said step of obtaining a first signal quality value further comprises the step of providing a hysteresis value correlating the physical location of the base-site apparatus that is a source base-site and the base-site apparatus that is a target base-site.
Claim 45
Dependent Claim
34 words
The method of claim 36 wherein said step of comparing further comprises the step of responding when said third signal quality value is greater than said first signal quality value plus said hysteresis value.
Claim 46
Dependent Claim
30 words
The method of claim 35 wherein said step of comparing further comprises the step of responding when said third signal quality value is greater than said second signal quality value.
Claim 47
Independent Claim
217 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a target base-site, the source base-site coupled to the target base-site via a base-site interface, the method comprising the steps of: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; estimating a second signal quality value; sending, via the base-site interface, said first and second signal quality values to the target base-site; obtaining, at the target base-site, a third signal quality value of said signal when received by the target base-site; comparing, at the target base-site, said first signal quality value to said third signal quality value during a first time period; transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said first signal quality value; comparing, at the target base-site, said second signal quality value to said third signal quality value during a second time period if said third signal quality value is not preferable over said first signal quality value; and transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said second signal quality value.
Claim 48
Independent Claim
217 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a target base-site, the source base-site coupled to the target base-site via a base-site interface, the method comprising the steps of: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; estimating a second signal quality value; sending, via the base-site interface, said first and second signal quality values to the target base-site; obtaining, at the target base-site, a third signal quality value of said signal when received by the target base-site; comparing, at the target base-site, said first signal quality value to said third signal quality value during a first time period; transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said first signal quality value; comparing, at the target base-site, said second signal quality value to said third signal quality value during a second time period if said third signal quality value is not preferable over said first signal quality value; and transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said second signal quality value.
Claim 49
Independent Claim
189 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a target base-site, the method comprising the steps of: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; calculating a forecasted signal quality value; obtaining, at the target base-site, a third signal quality value of said signal when received by the target base-site; comparing, at the target base-site, said first signal quality value to said third signal quality value during a first time period; transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said first signal quality value; comparing, at the target base-site, said forecasted signal quality value to said third signal quality value during a second time period if said third signal quality value is not preferable over said first signal quality value; and transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said forecasted signal quality value.
Claim 50
Independent Claim
189 words
A method of communication transfer in a radiotelephone system having a mobile unit communicating to a source base-site, the mobile unit requiring a communication transfer from the source base-site to a target base-site, the method comprising the steps of: obtaining, at the source base-site, a first signal quality value of a signal when received by the source base-site; calculating a forecasted signal quality value; obtaining, at the target base-site, a third signal quality value of said signal when received by the target base-site; comparing, at the target base-site, said first signal quality value to said third signal quality value during a first time period; transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said first signal quality value; comparing, at the target base-site, said forecasted signal quality value to said third signal quality value during a second time period if said third signal quality value is not preferable over said first signal quality value; and transferring communication from the source base-site to the target base-site if said third signal quality value is preferable over said forecasted signal quality value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |