| abstract |
there is a need to support narrowband tdd frame structure for narrowband communications. the present invention provides a solution by supporting one or more narrowband tdd frame structures for narrowband communications. in one aspect of the invention, a method, a computer-readable medium and an apparatus are provided. the apparatus can determine a narrowband tdd frame structure for narrowband communications from a group of narrowband tdd frame structures. in one aspect, the narrowband tdd frame structure can include a set of downlink subframes and more than one special subframe. the apparatus can determine a set of narrow band carriers and a minimum set of subframes in the set of narrow band carriers based, at least in part, on the set of downlink subframes and more than one special subframe in which a nrs should be transmitted. the apparatus can transmit the nrs using the narrowband tdd frame structure determined for narrowband communications. |