Downlink power adjustment in narrowband wireless communications

A method for wireless communication at a wireless device, comprising:

• identifying, at the wireless device, a number of antenna ports to be used for a narrowband transmission over a narrowband downlink shared channel;
• identifying, at the wireless device, a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• identifying that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• identifying, at the wireless device, a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• signaling, at the wireless device, the second ratio to one or more receivers;
• and
• transmitting, at the wireless device, the narrowband transmission to the one or more receivers according to the identified EPRE of the downlink shared channel resources and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.

An apparatus for wireless communication, comprising:

• a processor;
• and
• memory in electronic communication with the processor,
• wherein the processor and memory are configured to cause the apparatus to:
• identify a number of antenna ports used for a narrowband transmission over a narrowband downlink shared channel;
• identify a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• identify that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• identify a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• and
• demodulate the downlink shared channel resources based at least in part on the first ratio and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.

An apparatus for wireless communication, comprising:

• a processor;
• and
• memory in electronic communication with the processor,
• wherein the processor and memory configured to cause the apparatus to:
• identify a number of antenna ports to be used for a narrowband transmission over a narrowband downlink shared channel;
• identify a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• identify that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• identify a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• signal the second ratio to one or more receivers;
• and
• transmit the narrowband transmission to the one or more receivers according to the identified EPRE of the first downlink shared channel resources and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.

An apparatus for wireless communication, comprising:

• means for identifying a number of antenna ports used for a narrowband transmission over a narrowband downlink shared channel;
• means for identifying a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• means for identifying that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• means for identifying a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• and
• means for demodulating the downlink shared channel resources based at least in part on the first ratio and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.

An apparatus for wireless communication, comprising:

• means for identifying a number of antenna ports to be used for a narrowband transmission over a narrowband downlink shared channel;
• means for identifying a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• means for identifying that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• means for identifying a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• means for signaling the second ratio to one or more receivers;
• and
• means for transmitting the narrowband transmission to the one or more receivers according to the identified EPRE of the downlink shared channel resources and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.

A non-transitory computer-readable medium storing code for wireless communication implemented by a wireless device, the code comprising instructions executable by a processor to:

• identify, at the wireless device, a number of antenna ports used for a narrowband transmission over a narrowband downlink shared channel;
• identify, at the wireless device, a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• identify that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• identify, at the wireless device, a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• and
• demodulate, at the wireless device, the downlink shared channel resources based at least in part on the first ratio and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.

A non-transitory computer-readable medium storing code for wireless communication implemented by a wireless device, the code comprising instructions executable by a processor to:

• identify, at the wireless device, a number of antenna ports to be used for a narrowband transmission over a narrowband downlink shared channel;
• identify, at the wireless device, a first ratio between an energy per resource element (EPRE) of downlink shared channel resources of the narrowband downlink shared channel and an EPRE of a narrowband reference signal (NB-RS) based at least in part on the number of antenna ports;
• identify that the narrowband downlink shared channel is configured according to an in-band deployment within a wideband downlink shared channel;
• identify, at the wireless device, a second ratio between the EPRE of the NB-RS and an EPRE of a cell specific reference signal (CRS) of the wideband downlink shared channel based at least in part on identifying that the narrowband downlink shared channel is configured according to the in-band deployment;
• signal, at the wireless device, the second ratio to one or more receivers;
• and
• transmit, at the wireless device, the narrowband transmission to the one or more receivers according to the identified EPRE of the downlink shared channel resources and the second ratio, wherein the narrowband downlink shared channel comprises the NB-RS and the CRS of the wideband downlink shared channel.