Systems and methods for multimode wireless communication handoff
First Claim
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1. A method for performing handover between network service via first and second radio access technologies (RATs), comprising:
- while communicating via the first RAT, detecting a trigger to initiate a scan for network service via the second RAT, wherein the first and second RATs are different, and wherein the trigger is detected when a number of neighbors received in a neighbor-listing message is less than a number of neighbors previously received in a neighbor-listing message;
initiating the scan for the second RAT, in response to detecting the trigger; and
determining whether to handover to network service via the second RAT based on results of the scan.
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Abstract
Methods and apparatus for autonomous handover between WiMAX (Worldwide Interoperability for Microwave Access) and CDMA (Code Division Multiple Access) EVDO (Evolution-Data Optimized) or 1×RTT (one times Radio Transmission Technology, or 1×) networks during normal operation of a dual-mode mobile station (MS) are provided. The methods and apparatus may improve service continuity during handover and need not require any changes to the WiMAX or CDMA standards.
50 Citations
72 Claims
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1. A method for performing handover between network service via first and second radio access technologies (RATs), comprising:
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while communicating via the first RAT, detecting a trigger to initiate a scan for network service via the second RAT, wherein the first and second RATs are different, and wherein the trigger is detected when a number of neighbors received in a neighbor-listing message is less than a number of neighbors previously received in a neighbor-listing message; initiating the scan for the second RAT, in response to detecting the trigger; and determining whether to handover to network service via the second RAT based on results of the scan. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A receiver for wireless communication, comprising:
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at least one processor configured to execute; trigger-detection logic configured to detect a trigger to initiate a scan for network service via a second radio access technology (RAT) while communicating via a first RAT, wherein the first and second RATs are different, wherein the trigger-detection logic is configured to detect the trigger when a number of neighbors received in a neighbor-listing message is less than a number of neighbors previously received in a neighbor-listing message; scan-initiation logic configured to initiate the scan for the second RAT, in response to detecting the trigger; and handover-determination logic configured to determine whether to handover to network service via the second RAT based on results of the scan; and a memory coupled to the at least one processor. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An apparatus for performing handover between network service via first and second radio access technologies (RATs), comprising:
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means for detecting a trigger to initiate a scan for network service via the second RAT while communicating via the first RAT, wherein the first and second RATs are different, wherein the means for detecting a trigger is configured to detect the trigger when a number of neighbors received in a neighbor-listing message is less than a number of neighbors previously received in a neighbor-listing message; means for initiating the scan for the second RAT, in response to detecting the trigger; and means for determining whether to handover to network service via the second RAT based on results of the scan. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A mobile device, comprising:
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a receiver front-end for communicating via a first radio access technology (RAT); trigger-detection logic configured to detect a trigger to initiate a scan for network service via a second RAT while communicating via the first RAT, wherein the first and second RATs are different, wherein the trigger-detection logic is configured to detect the trigger when a number of neighbors received in a neighbor-listing message is less than a number of neighbors previously received in a neighbor-listing message; scan-initiation logic configured to initiate the scan for the second RAT, in response to detecting the trigger; and handover-determination logic configured to determine whether to handover to network service via the second RAT based on results of the scan. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A computer-program apparatus for performing handover between network service via first and second radio access technologies (RATs) comprising a non-transitory computer readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:
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instructions for, while communicating via the first RAT, detecting a trigger to initiate a scan for network service via the second RAT, wherein the first and second RATs are different, wherein the trigger is detected when a number of neighbors received in a neighbor-listing message is less than a number of neighbors previously received in a neighbor-listing message; instructions for initiating the scan for the second RAT, in response to detecting the trigger; and instructions for determining whether to handover to network service via the second RAT based on results of the scan. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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Specification