Narrow bandwidth transmission schemes in next-generation enhanced long range WLAN

#The present disclosure is generally related to wireless communications and, more particularly, to narrow bandwidth transmission schemes in next-generation Enhanced Long Range (ELR) wireless local area networks (WLANs).

#Unless otherwise indicated herein, approaches described in this section are not prior art to the claims listed below and are not admitted as prior art by inclusion in this section.

#In wireless communications such as Wi-Fi (or WiFi) in accordance with the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, one of the key objectives for next-generation WLAN systems relates to improvement of data rate at different signal-to-noise ratio (SNR) levels. Some Internet-of-Things (IoT) applications, such as wireless video doorbells and outdoor surveillance cameras, require longer coverage WiFi solutions. Narrow bandwidth has the advantage of higher power density per frequency tone for a given total transmission power. Moreover, narrow bandwidth subchannels can be duplicated for transmission so as to improve the robustness on the receiving end. In an IEEE 802.11ah sub-1-GHz (S1G) system, narrow bandwidths 1 GHZ, 2 GHZ, 4 GHZ, 8 GHZ and 16 GHz have been considered and supported for longer range coverage and outdoor applications. In legacy IEEE 802.11g systems, narrow bandwidths 5 MHz and 10 MHz by down-clocked from 20 MHz have been introduced. However, how to perform transmission in the narrow bandwidths 2.5 MHz, 5 MHz and 10 MHz for next-generation ELR WLANS remains to be specified. Therefore, there is a need for a solution of narrow bandwidth transmission schemes in next-generation ELR WLANs.

#The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of the present disclosure. The drawings illustrate implementations of the disclosure and, together with the description, serve to explain the principles of the disclosure. It is appreciable that the drawings are not necessarily in scale as some components may be shown to be out of proportion than the size in actual implementation to clearly illustrate the concept of the present disclosure.

#FIG. 1 is a diagram of an example network environment in which various solutions and schemes in accordance with the present disclosure may be implemented.

#FIG. 2 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.

#Detailed embodiments and implementations of the claimed subject matters are disclosed herein. However, it shall be understood that the disclosed embodiments and implementations are merely illustrative of the claimed subject matters which may be embodied in various forms. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that description of the present disclosure is thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. In the description below, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations.

#Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and/or solutions pertaining to narrow bandwidth transmission schemes in next-generation ELR WLANs. According to the present disclosure, a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.

#It is noteworthy that, in the present disclosure, a regular RU (rRU) refers to a RU with tones that are continuous (e.g., adjacent to one another) and not interleaved, interlaced or otherwise distributed. Moreover, a 26-tone regular RU may be interchangeably denoted as RU26 (or rRU26), a 52-tone regular RU may be interchangeably denoted as RU52 (or rRU52), a 106-tone regular RU may be interchangeably denoted as RU106 (or rRU106), a 242-tone regular RU may be interchangeably denoted as RU242 (or rRU242), and so on. Moreover, an aggregate (26+52)-tone regular multi-RU (MRU) may be interchangeably denoted as MRU78 (or rMRU78), an aggregate (26+106)-tone regular MRU may be interchangeably denoted as MRU132 (or rMRU132), and so on.