Enabling operation of variable bandwidth users in millimeter-wave systems

An apparatus for wireless communications by a base station, comprising:

• at least one processor configured to:
• transmit, on a narrowband region within a wider system bandwidth, a directional primary synchronization signal (DPSS);
• receive feedback information from one or more user equipments (UEs) based on the DPSS, wherein the feedback information comprises an indication of a bandwidth capability of a UE that transmitted the feedback information;
• allocate resources to the one or more UEs within at least one of the wider system bandwidth or the narrowband region based, at least in part, on the feedback information;
• and
• performing beam training, in addition to the DPSS transmission, by transmitting beam tracking waveforms to at least one UE of the one or more UEs using different combinations of directions and bandwidth regions in a region of the wider system bandwidth that is wider than the narrowband region;
• and
• a memory coupled with the at least one processor.

A method for wireless communication by a user equipment (UE), comprising:

• detecting a directional primary synchronization signal (DPSS) transmitted from a base station in a narrowband region of a wider system bandwidth;
• transmitting feedback information, generated based, at least in part, on the DPSS, to the base station, wherein the feedback information comprises an indication of a bandwidth capability of the UE;
• communicating with the base station using resources allocated within at least one of the wider system bandwidth or the narrowband region, based on the feedback information;
• and
• performing beam training, in addition to detecting the DPSS transmission, by detecting beam tracking waveforms, transmitted by the base station, using different combinations of directions and bandwidth regions in a region of the wider system bandwidth that is wider than the narrowband region.

An apparatus for wireless communication by a user equipment (UE), comprising:

• at least one processor configured to:
• detect a directional primary synchronization signal (DPSS) transmitted from a base station in a narrowband region of a wider system bandwidth;
• transmit feedback information, generated based, at least in part, on the DPSS, to the base station, wherein the feedback information comprises an indication of a bandwidth capability of the UE;
• communicate with the base station using resources allocated within at least one of the wider system bandwidth or the narrowband region, based on the feedback information;
• and
• perform the beam training, in addition to detecting the DPSS transmission, by detecting beam tracking waveforms, transmitted by the base station, using different combinations of directions and bandwidth regions in a region of the wider system bandwidth that is wider than the narrowband region;
• and
• a memory coupled with the at least one processor.