Patent · US Active

Random access channel design for narrowband wireless communication

US10080244B2 · kind B2 · utility

12Cited by
0References
58Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 23, 2016
Grant dateSep 18, 2018
Priority date
Expiry dateDec 15, 2036

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04W74/002
  • WIPO fieldDigital communication
  • WIPO sectorElectrical engineering

Abstract

Random access techniques may use subcarriers allocated for random access requests in narrowband communication. Physical resources may be selected for transmission of a random access request based on a “coverage class” of a user equipment (UE). In some examples, a set of coverage classes may be identified based on one or more UE channel conditions, such as pathloss. Each coverage class may have one or more associated subcarriers of a set of subcarriers in a narrowband bandwidth, and random access messages may be transmitted using the associated subcarrier(s) for the coverage class of a UE. In some examples, different coverage classes may have different numbers of redundant transmissions of a random access message, which may be based on channel conditions associated with a particular coverage class. A UE, based on a measured channel condition, may determine a coverage class and select a subcarrier based on the determined coverage class.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.