US 12,120,753 B2 · Communication apparatus and communication method for multi-band random access

Abstract

A station apparatus includes a receiver and a controller. The receiver, in operation, receives a Trigger frame allocating Random Access Resource Units (RA-RUs) over multiple bands. The Trigger frame includes a User Info field that comprises a Band Indication subfield for specifying a first band among the multiple bands, an RU Allocation subfield for indicating a first RA-RU of one or more contiguous RA-RUs in the first band, and a Number of RA-RU subfield for indicating a number of the contiguous RA-RUs minus one in the first band. The controller, in operation: sets a first Orthogonal Frequency Division Multiple Access (OFDMA) random access backoff (OBO) counter to 0 if an initial value of the first OBO counter is not larger than a number of eligible RA-RUs in the first band, which is a subset of contiguous RA-RUs in the Trigger frame; and randomly selects one of the eligible RA-RUs.

Claims15

Dependent claims

A station (STA) apparatus comprising:

a receiver which, in operation, receives a Trigger frame allocating Random Access Resource Units (RA-RUs) over multiple bands,
the Trigger frame including a first User Info field that comprises a first Band Indication subfield for specifying a first band among the multiple bands, a first RU Allocation subfield for indicating a first RA-RU of one or more contiguous RA-RUs in the first band specified by the first Band Indication subfield, and a first Number of RA-RU subfield for indicating a number of the contiguous RA-RUs minus one in the first band specified by the first Band Indication subfield;
and
a controller which, in operation:
sets a first Orthogonal Frequency Division Multiple Access (OFDMA) random access backoff (OBO) counter to 0 if an initial value of the first OBO counter is not larger than a number of first eligible RA-RUs in the first band, which is a first subset of contiguous RA-RUs specified by the Trigger frame;
and
randomly selects one of the first eligible RA-RUs in the first band.

4 more elements

A communication method for uplink Orthogonal Frequency Division Multiple Access (OFDMA) based random access, the method comprising:

initializing a first Orthogonal Frequency Division Multiple Access (OFDMA) random access backoff (OBO) counter according to a first OFDMA Contention Window (OCW);
receiving a Trigger frame having Random Access Resource Units (RA-RUs) over multiple bands, the Trigger frame including a first User Info field that comprises a first Band Indication subfield for specifying a first band among the multiple bands, a first RU Allocation subfield for indicating a first RA-RU of one or more contiguous RA-RUs in the first band specified by the first Band Indication subfield, and a first Number of RA-RU subfield for indicating a number of the contiguous RA-RUs minus one in the first band specified by the first Band Indication subfield;
setting the first OBO counter to 0 if an initial value of the first OBO counter is not larger than a number of first eligible RA-RUs in the first band, which is a first subset of contiguous RA-RUs specified by the Trigger frame;
and
randomly selecting one of the first eligible RA-RUs in each of the multiple bands.

2 more elements

Dependencies are inferred from the claim text.

Communication apparatus and communication method for multi-band random access

Life of this patent

Communication apparatus and communication method for multi-band random access

Life of this patent

Abstract

Claims15