Mobile device-initiated measurement gap request
Described herein are mechanisms and methods that facilitate preparation of inter-radio access technology (inter-RAT) and/or inter-frequency handover with respect to a mobile device (user equipment). User equipment can indicate to a network servicing the user equipment that the user equipment desires to perform measurements with respect to a different frequency and/or different technology. Data on the downlink channel can then be scheduled to ensure that data intended for the user equipment is not lost while the user equipment is performing the measurements.
1. A method for determining signal quality in a communication network, comprising:
measuring, on a wireless communication device, a signal quality on a first network downlink channel;
comparing the signal quality of the first network downlink channel with a threshold quality value;
determining, based upon the comparing, whether to tune to a second network channel to obtain signal characteristics of the second network channel, wherein the second network channel corresponds to at least one of a different frequency and a different radio-access technology than the first network downlink channel;
requesting a measurement gap from a network base station, wherein the network base station is in communication with the wireless communication device via the first network downlink channel;
measuring a signal quality of the second network channel during the measurement gap; and
determining whether to switch communications to the communication network via the second network channel.
2. The method of claim 1 , wherein requesting a measurement gap comprises transmitting a channel quality indicator (CQI) report.
3. The method of claim 1 , further comprising relaying multiple indications of a desirability of undertaking the measurements to the network.
4. The method of claim 1 , further comprising transmitting the request for the measurement gap to the communication network by way of layer 3 signaling.
5. The method of claim 1 , further comprising transmitting the request for the measurement gap to the communication network by way of layer 2 signaling.
6. The method of claim 1 , further comprising performing the measurements upon requesting the measurement gap without awaiting receipt of an acknowledgment from the communication network.
7. The method of claim 1 , further comprising:
receiving an acknowledgment that the communication network has received the request for the measurement gap; and
performing the measurements upon receipt of the acknowledgment.
8. The method of claim 1 , further comprising indicating to the communication network that the user equipment has performed the measurements and is ready for additional data communication.
9. The method of claim 1 , further comprising
receiving a schedule from the network base station, the schedule indicating a duration of time within which the second channel signal quality measurements can be undertaken; and
performing the measurements in accordance with the schedule.
10. The method of claim 1 , wherein requesting the measurement gap comprises transmitting an indication within a MAC-e header.
11. The method of claim 1 , further comprising:
determining that it is desirable to undertake the measurements based at least in part upon the determination that the signal quality of the downlink channel is below the threshold.
12. User equipment configured to perform the method of claim 1 .
13. The method of claim 1 , wherein the threshold quality value relates to signal quality of a downlink channel.
14. A communications apparatus, comprising:
a memory that comprises instructions for indicating to a network that performing measurements on a second network channel is desired, wherein the second network channel corresponds to at least one of a different frequency and a different radio-access technology than a first network downlink channel;
a processor that is configured to execute the instructions within the memory;
a quality metric component that measures a signal quality of the first network downlink channel, compares the signal quality metric with a threshold signal quality metric value, and in the event that the signal quality metric is below the threshold, generates a request for a measurement gap, where the measurement gap has a duration of at least one or more frame time-slots, and measures a signal quality of the second network channel during the measurement gap; and
a transceiver component to forward the measurement gap request to a network base station, wherein the network base station is in communication with the wireless communication device via the first network downlink channel.
15. The communications apparatus of claim 14 , the memory further comprises instructions for comparing the determined quality metric with a pre-defined threshold defined by a network that is providing services to the communications apparatus.
16. The communications apparatus of claim 14 , the memory further comprises instructions for performing the measurements without transmittal of the request to the network.
17. The communications apparatus of claim 14 , the memory further comprises instructions for packaging the request within a channel quality indicator report.
18. The communications apparatus of claim 14 , the memory further comprises instructions for packaging the request within a MAC-e header.
19. The communications apparatus of claim 14 being a mobile telephone.
20. The communications apparatus of claim 14 , the memory further comprises instructions for indicating to a network that measurements have been performed and that the communications apparatus is ready for additional data communication.
21. A communications apparatus, comprising:
means for measuring a signal quality of a first network downlink channel;
means for determining that the measured signal quality is below a threshold value;
means for determining that a measurement gap is desired, wherein a duration of the measurement gap comprises one or more frame time-slots;
means for indicating to a network base station that the measurement gap is desired, wherein the network base station is in communication with the wireless communication device via the first network downlink channel; and
means for measuring a signal quality of a second network channel during the measurement gap, wherein the second network channel corresponds to at least one of a different frequency and a different radio-access technology than the first network downlink channel.
22. A computer readable non-transitory storage medium, having stored thereon, computer executable instructions for determining signal quality in a communication network according to a method comprising:
measuring, on a wireless communication device, a signal quality on a first network downlink channel;
comparing the signal quality of the first network downlink channel with a threshold quality value;
determining, based upon the quality comparison, whether to tune to a second network channel to obtain signal characteristics of that channel, wherein the second network channel corresponds to at least one of a different frequency and a different radio-access technology than the first network downlink channel;
requesting a measurement gap from a network base station, wherein the network base station is in communication with the wireless communication device via the first network downlink channel;
measuring a signal quality of the second network channel during the measurement gap; and
determining whether to switch communications to the network via the second network channel.