US Patent No. 10,893,542
RANDOM ACCESS METHOD IN BDMA SYSTEM AND RANDOM ACCESS METHOD IN PATTERN/POLARIZED BDMA SYSTEM
| Patent No. | 10,893,542 |
|---|---|
| Issue Date | January 12, 2021 |
| Title | Random Access Method In Bdma System And Random Access Method In Pattern/polarized Bdma System |
| Inventorship | Dong Ho Cho, Daejeon (KR) Byung Chang Chung, Daejeon (KR) Dae Hee Park, Daejeon (KR) Joon Sang Han, Daejeon (KR) Yun Sik Kim, Daejeon (KR) |
| Assignee | KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR) |
Claim of US Patent No. 10,893,542
1. A random access method in a beam division multiple access (BDMA) system comprising the steps of:receiving, by a terminal, a reference signal of at least one beam sector transmitted from an access point (AP) device;
estimating, by the terminal, whether the terminal is in a center area of the beam sector provided by the AP device or in a boundary area of the beam sector based on a strength of the reference signal;
transmitting, by the terminal, a different preamble to the AP device in accordance with location information of whether the terminal is located in the center area or in the boundary area; and
determining, by the AP device, a target beam sector for transmitting information about uplink resources to be used by the terminal, among a plurality of beam sectors on the basis of the received preamble,
wherein when the terminal estimates that the terminal is in the center area, the terminal transmits a preamble in a first preamble set to the AP device and when the terminal estimates that the terminal is in the boundary area, the terminal transmits a preamble in a second preamble set to the AP device.
estimating, by the terminal, whether the terminal is in a center area of the beam sector provided by the AP device or in a boundary area of the beam sector based on a strength of the reference signal;
transmitting, by the terminal, a different preamble to the AP device in accordance with location information of whether the terminal is located in the center area or in the boundary area; and
determining, by the AP device, a target beam sector for transmitting information about uplink resources to be used by the terminal, among a plurality of beam sectors on the basis of the received preamble,
wherein when the terminal estimates that the terminal is in the center area, the terminal transmits a preamble in a first preamble set to the AP device and when the terminal estimates that the terminal is in the boundary area, the terminal transmits a preamble in a second preamble set to the AP device.