Codec-specific handover thresholds
AssigneeT-Mobile USA, Inc.
InventorsMark McDiarmid, Jun Liu, Ming Shan Kwok
Life of this patent
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Abstract
A handover procedure can be implemented using a codec-specific threshold as a triggering event for the handover procedure. A mobile device can initiate a communication session with a serving access point (AP). The mobile device can receive a codec established for the communication session, access a set of codec-specific thresholds stored in memory of the mobile device to determine a handover triggering threshold that is specific to the codec used for the communication session. The mobile device can measure a parameter of a radio signal from the serving AP, and when the measured parameter falls below the codec-specific threshold, a handover procedure can be initiated to transition the communication session to a target AP.
Claims21
A computer-implemented method comprising:
- sending, by a mobile device, a registration message to a serving access point (AP) configured to provide access to an Internet Protocol (IP) Multimedia Subsystem (IMS) core;
- sending, by the mobile device, a message to the serving AP for initiating a communication session;
- receiving, at the mobile device, a selected codec for the communication session;
- accessing, by the mobile device and from memory of the mobile device, a data structure that maintains a first codec-specific threshold in association with a first codec and a second codec-specific threshold in association with a second codec, wherein the first codec-specific threshold and the second codec-specific threshold are different thresholds;
- comparing, by the mobile device, the selected codec to the first codec stored in the memory of the mobile device;
- determining, by the mobile device, that the selected codec corresponds to the first codec;
- measuring a parameter of a radio signal from the serving AP to obtain a radio signal measurement;
- determining that the radio signal measurement is below the first codec-specific threshold associated with the first codec;
- and
- transitioning the communication session from the serving AP to a target AP in communication range of the mobile device, the target AP configured to provide access to the IMS core.
A mobile device comprising:
- a processor;
- one or more radio chips;
- and
- memory storing computer-executable instructions that, when executed by the processor, cause the mobile device to perform operations comprising:
- initiating, via the one or more radio chips, a communication session over an Internet Protocol (IP) Multimedia Subsystem (IMS) core using a selected codec and a serving access point (AP) for the communication session;
- accessing, from the memory of the mobile device, a data structure that maintains a first codec-specific threshold in association with a first codec and a second codec-specific threshold in association with a second codec, wherein the first codec-specific threshold and the second codec-specific threshold are different thresholds;
- comparing the selected codec to the first codec stored in the memory of the mobile device;
- determining that the selected codec corresponds to the first codec;
- measuring, via the one or more radio chips, a parameter of a radio signal from the serving AP to obtain a radio signal measurement;
- determining that the radio signal measurement is below the first codec-specific threshold associated with the first codec;
- and
- transitioning, via the one or more radio chips, the communication session from the serving AP to a target AP in communication range of the mobile device.
One or more non-transitory computer-readable storage media of a mobile device, the one or more non-transitory computer-readable storage media storing computer-executable instructions that, when executed by one or more processors of the mobile device, cause the mobile device to perform operations comprising:
- initiating, via one or more radio chips of the mobile device, a communication session over an Internet Protocol (IP) Multimedia Subsystem (IMS) core using a selected codec and a serving access point (AP) for the communication session;
- accessing, from the one or more non-transitory computer-readable storage media of the mobile device, a data structure that maintains a first codec-specific threshold in association with a first codec and a second codec-specific threshold in association with a second codec, wherein the first codec-specific threshold and the second codec-specific threshold are different thresholds;
- comparing the selected codec to the first codec stored in the one or more non-transitory computer-readable storage media of the mobile device;
- determining that the selected codec corresponds to the first codec;
- measuring, via the one or more radio chips, a parameter of a radio signal from the serving AP to obtain a radio signal measurement;
- determining that the radio signal measurement is below the first codec-specific threshold associated with the first codec;
- and
- transitioning, via the one or more radio chips, the communication session from the serving AP to a target AP in communication range of the mobile device.
Dependencies are inferred from the claim text.