Communications device and method in high-frequency system

A method, comprising:

• acquiring a space region of a plurality of space (S) regions in a to-be-scanned sector of a cell, wherein the cell is divided into the plurality of S regions according to a quantity of a plurality of beams emitted by a base station, and wherein the plurality of beams are used to poll or cover each of the plurality of S regions;
• acquiring a plurality of time regions (T) of the S region of the plurality of S regions, wherein each S region of the plurality of S regions is respectively divided into the plurality of T regions, and wherein in a time period a respective beam of the plurality of beams sequentially polls or covers each T region of the plurality of T regions of each respective S region of the plurality of S regions in a time division manner;
• sending a synchronization sequence to user equipment in a first T region of the plurality of T regions using a preset frame structure, wherein the frame structure is carried in a beam of the plurality of beams;
• and
• receiving, by the base station, a sequence that is fed back by the user equipment, determining a location of the user equipment according to the sequence, and determining, according to the location of the user equipment, a serving beam for the base station to communicate with the user equipment, and to confirm that scanning for the user equipment is completed.

A base station, comprising:

• a processor, configured to:
• determine, according to a quantity of beams of a plurality of beams emitted by the base station, a quantity M of a plurality of space (S) regions resulting from division of a to-be-scanned sector of a cell of the base station, wherein each of the M S regions respectively corresponds to one beam emitted by the base station, M is equal to the quantity of the plurality of beams;
• divide, according to a predefined S region division rule, the to-be-scanned sector into M equal-sized S regions, or M S regions whose sizes correspond to widths of the corresponding beams;
• divide each of the M S regions into a respective plurality of T regions according to a preset T region division rule;
• a transmitter, configured to send, using a preset frame structure, a plurality of synchronization sequences that are obtained by the processor to user equipment in the plurality of T regions of each respective S region of the plurality of S regions, wherein each respective synchronization sequence is carried in a beam of the plurality of beams;
• and
• a receiver, configured to receive a sequence that is fed back by the user equipment;
• wherein the processor is further configured to determine a location of the user equipment according to the received sequence, and to determine, according to the location of the user equipment, a serving beam for the base station to communicate with the user equipment, and to confirm that scanning for the user equipment is completed.