Enabling Receive Diversity During Paging Channel Timeline Operation

1. A method for operating a wireless user equipment (UE) device, the method comprising: monitoring a paging channel; detecting an indication of a first paging message on the paging channel, wherein the first paging message comprises a message length field indicating a message length of the first paging message; receiving and decoding the message length field of the first paging message on the paging channel; determining that the message length indicated in the message length field is incorrect; enabling receive diversity for at least one subsequent paging occasion in response to determining that the message length indicated in the message length field is incorrect; and determining that the message length indicated in the message length field of the first paging message is incorrect comprises one or more of: determining that the message length field indicates a message length which is longer than a specified maximum paging message length; or detecting an indication of a second paging message on the paging channel while decoding the first paging message.

2. The method of claim 1 , the method further comprising: ceasing to decode the first paging message after determining that the message length indicated in the message length field is incorrect, based on determining that the message length indicated in the message length field is incorrect.

3. The method of claim 1 , wherein determining that the message length indicated in the message length field is incorrect comprises: determining that the message length field indicates a message length which is longer than a specified maximum paging message length.

4. The method of claim 1 , wherein determining that the message length indicated in the message length field is incorrect comprises: detecting an indication of a second paging message on the paging channel while decoding the first paging message according to the message length indicated in the message length field.

5. The method of claim 1 , wherein the UE operates according to a 3GPP2 cellular communication standard.

6. The method of claim 1 , wherein enabling receive diversity comprises utilizing multiple antennas of the UE to monitor the paging channel for the at least one subsequent paging occasion.

7. The method of claim 1 , the method further comprising: disabling receive diversity after the at least one subsequent paging occasion if no further errors are detected while attempting to receive and decode paging messages on the at least one subsequent paging occasion.

8. A wireless user equipment (UE) device, comprising: a radio, comprising at least two antennas configured for wireless communication; a processing element operably coupled to the radio; wherein the radio and the processing element are configured to: monitor a paging channel; detect an indication of a first paging message on the paging channel, wherein the first paging message comprises a message length field indicating a message length of the first paging message; receive and decoding the message length field of the first paging message on the paging channel; determine that the message length indicated in the message length field is incorrect; enable receive diversity for at least one subsequent paging occasion in response to determining that the message length indicated in the message length field is incorrect; and determine that the message length indicated in the message length field of the first paging message is incorrect comprises one or more of: determining that the message length field indicates a message length which is longer than a specified maximum paging message length; or detecting an indication of a second paging message on the paging channel while decoding the first paging message.

9. The UE of claim 8 , wherein enabling receive diversity comprises utilizing at least two antennas of the radio to monitor the paging channel for the at least one subsequent paging occasion.

10. The UE of claim 8 , wherein the radio and the processing element are configured to monitor the paging channel, detect the indication of the first paging message, and receive and decode the message length field of the paging message with receive diversity disabled, wherein enabling receive diversity for the at least one subsequent paging occasion in response to determining that the message length indicated in the message length field is incorrect configures the radio and the processing element to monitor the paging channel, detect indications of paging messages, and receive and decode message length fields of paging messages with receive diversity enabled for the at least one subsequent paging occasion.

11. The UE of claim 10 , wherein monitoring the paging channel, detecting the indication of the first paging message, and receiving and decoding the message length field of the paging message with receive diversity disabled comprises using only one antenna of the radio to monitor the paging channel, detect the indication of the first paging message, and receive and decode the message length field of the paging message.

12. The UE of claim 8 , wherein the radio and the processing element are configured to monitor the paging channel, detect the indication of the first paging message, and receive and decode the message length field of the paging message with receive diversity enabled, wherein enabling receive diversity for the at least one subsequent paging occasion in response to determining that the message length indicated in the message length field is incorrect comprises extending the use of receive diversity for the at least one subsequent paging occasion.

13. The UE of claim 8 , wherein, in response to determining that the message length indicated in the message length field is incorrect, the radio and the processing element are configured to enable receive diversity for one of: a predetermined amount of time; or a predetermined number of paging occasions, wherein the radio and the processing element are configured to disable receive diversity after the predetermined amount of time or predetermined number of paging occasions if no further errors are detected while attempting to receive and decode paging messages during the predetermined amount of time or predetermined number of paging occasions.

14. The UE of claim 8 , wherein the UE is configured to communicate using at least a first radio access technology and a second radio access technology, wherein when receive diversity is disabled, the UE is capable of utilizing the at least two antennas of the radio to communicate using each of the first and second radio access technologies simultaneously, wherein when receive diversity is enabled, the UE is able to communicate using only one of the first or second radio access technology at a time.

15. A non-transitory computer accessible memory medium comprising program instructions for a wireless user equipment (UE) device, wherein when executed, the program instructions cause the UE to: monitor a paging channel at a first paging occasion, wherein a first antenna is used to monitor the paging channel at the first paging occasion; detect an indication of a first paging message on the paging channel using the first antenna during the first paging occasion, wherein the first paging message comprises a message length field indicating a message length of the first paging message; receive and decoding the message length field of the first paging message on the paging channel using the first antenna during the first paging occasion; determine that the message length indicated in the message length field of the first paging message is incorrect; monitor the paging channel for at least one subsequent paging occasion, wherein the first antenna and a second antenna are used to monitor the paging channel at the at least one subsequent paging occasion in response to determining that the message length indicated in the message length field of the first paging message is incorrect; and determining that the message length indicated in the message length field of the first paging message is incorrect comprises one or more of: determining that the message length field indicates a message length which is longer than a specified maximum paging message length; or detecting an indication of a second paging message on the paging channel while decoding the first paging message.

16. The memory medium of claim 15 , wherein the at least one subsequent paging occasion comprises a plurality of subsequent paging occasions, wherein the program instructions further cause the UE to monitor the paging channel using only the first antenna after the plurality of subsequent paging occasions if no further errors are detected while attempting to receive and decode paging messages during the plurality of subsequent paging occasions, wherein the program instructions further cause the UE to monitor the paging channel using the first antenna and the second antenna for at least one additional paging occasion after the plurality of subsequent paging occasions one or more further errors are detected while attempting to receive and decode paging messages during the plurality of subsequent paging occasions.

17. The memory medium of claim 15 , wherein the program instructions further cause the UE to: cease decoding the first paging message after determining that the message length indicated in the message length field of the first paging message is incorrect, based on determining that the message length indicated in the message length field of the first paging message is incorrect.

18. The memory medium of claim 15 , wherein monitoring the paging channel, detecting the indication of the first paging message, and receiving and decoding the message length field of the first paging message are performed in accordance with a 3GPP2 radio access technology, wherein the indication of the first paging message comprises a synchronized capsule indicator (SCI) having a value of 1.

19. The memory medium of claim 15 , wherein monitoring the paging channel for the first paging occasion and the at least one subsequent paging occasion are performed as part of discontinuous reception operation of the UE.