Random access method and device

A method of random access, applied to a user equipment UE, and comprising:

• receiving a broadcast message transmitted from a base station, wherein the broadcast message comprises physical random access channel (PRACH) configuration information and supplementary resource indication information;
• wherein the PRACH configuration information comprises:
• first indication information for characterizing first physical resource and
• second indication information for characterizing a random access preamble sequence;
• and
• wherein the supplementary resource indication information is used for characterizing second physical resource;
• obtaining a location of a first reference synchronization broadcast block (SSB) synchronization signal according to the first physical resource corresponding to the PRACH configuration information, wherein the first reference SSB synchronization signal is at a synchronization signal transmission period most proximate to the first physical resource and before the first physical resource;
• and
• transmitting the random access preamble sequence to the base station by using the second physical resource corresponding to the supplementary resource indication information when no first reference SSB synchronization signal is detected on physical resource occupied by the first reference SSB synchronization signal.

A device, comprising:

• one or more processors;
• and
• a non-transitory computer-readable storage medium storing instructions executable by the one or more processors,
• wherein the one or more processors are configured to:
• transmit a broadcast message to a user equipment (UE), wherein the broadcast message comprises physical random access channel (PRACH) configuration information and supplementary resource indication information;
• wherein the PRACH configuration information comprises:
• first indication information for characterizing first physical resource and
• second indication information for characterizing random access preamble sequence;
• and
• wherein the supplementary resource indication information is used for characterizing second physical resource;
• obtain a location of a first reference synchronization broadcast block (SSB) synchronization signal according to the first physical resource corresponding to the PRACH configuration information, wherein the first reference SSB synchronization signal is at a synchronization signal transmission period most proximate to the first physical resource and before the first physical resource;
• and
• monitor the random access preamble sequence on the second physical resource corresponding to the supplementary resource indication information when the first reference SSB synchronization signal is unsuccessfully transmitted.

A device, comprising:

• one or more processors;
• and
• a non-transitory computer-readable storage medium storing instructions executable by the one or more processors,
• wherein the one or more processors are configured to:
• receive a broadcast message transmitted from a base station, wherein the broadcast message comprises physical random access channel (PRACH) configuration information and supplementary resource indication information;
• wherein the PRACH configuration information comprises:
• first indication information for characterizing first physical resource and
• second indication information for characterizing random access preamble sequence;
• and
• wherein the supplementary resource indication information is used for characterizing second physical resource;
• obtain a location of a first reference synchronization broadcast block (SSB) synchronization signal according to the first physical resource corresponding to the PRACH configuration information, wherein the first reference SSB synchronization signal is at a synchronization signal transmission period most proximate to the first physical resource and before the first physical resource;
• and
• transmit the random access preamble sequence to the base station by using the second physical resource corresponding to the supplementary resource indication information when no first reference SSB synchronization signal is detected on physical resource occupied by the first reference SSB synchronization signal.