Random access procedure for determining uplink transmission capability

A random access apparatus, comprising:

• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to:
• group available random access resources into a plurality of random access resource groups, wherein the plurality of random access resource groups are in one-to-one correspondence with a plurality of different combinations, and each of the plurality of different combinations comprises a uplink transmission capability and a coverage level, the uplink transmission capability comprising a carrier support capability and an uplink subcarrier transmission bandwidth, the carrier support capability indicating whether multi-carrier transmission is supported, and the coverage level indicating channel transmission conditions;
• send information about the plurality of random access resource groups to a terminal device;
• receive a random access request from the terminal device, wherein the random access request is configured to request to access the apparatus;
• determine a target random access resource group to which a random access resource used for the random access request belongs, wherein the plurality of random access resource groups comprise the target random access resource group;
• and
• determine, based on the target random access resource group, an uplink transmission capability of the terminal device that matches the target random access resource group and, wherein
• the uplink transmission capability of the terminal device indicates that the terminal device is capable of supporting multi-carrier transmission, and the method further comprises:
• receiving, by the terminal device, scheduling information from the network device, wherein the scheduling information is configured to instruct the terminal device to perform single-carrier transmission, and the single-carrier transmission is triggered by the network device when a current uplink resource is insufficient for the terminal device to perform multi-carrier transmission.

A random access apparatus, comprising:

• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to:
• receive information about a plurality of random access resource groups from a network device, wherein the plurality of random access resource groups are in one-to-one correspondence with a plurality of different combinations, and each of the plurality of different combinations comprises a uplink transmission capability and a coverage level, the uplink transmission capability comprising a carrier support capability and an uplink subcarrier transmission bandwidth, the carrier support capability indicating whether multi-carrier transmission is supported, and the coverage level indicating channel transmission conditions;
• determine, from the plurality of random access resource groups, based on an uplink transmission capability of the apparatus, the coverage level of apparatus, and the information about the plurality of random access resource groups, a target random access resource group that matches the transmission capability of the apparatus;
• and
• send a random access request to the network device by using a random access resource in the target random access resource group, wherein the random access request is used to request to access the network device;
• and, wherein
• the uplink transmission capability of the apparatus indicates that the apparatus is capable of supporting multi-carrier transmission, and the receiving unit is further configured to:
• receive scheduling information from the network device, wherein the scheduling information is used to instruct the apparatus to perform single-carrier transmission, and the single-carrier transmission is triggered by the network when a current uplink resource is insufficient for the apparatus to perform multi-carrier transmission.