# US 10,772,130 B2 · Random access procedure for determining uplink transmission capability > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,130 B2 - Document ID: US10772130B2 - Status: Granted - Kind: B2 - Application number: 16/022,721 - Filed: 2018-06-29 - Published: 2018-10-25 - Granted: 2020-09-08 - Earliest claimed: 2015-12-29 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Han Zhou; Xiaolei Tie; Gengshi Wu - Web page: https://patentgrep.com/patent/US10772130B2 ## CPC - H04W 72/04: Wireless resource allocation - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 72/51: based on terminal or device properties - H04W 74/004: {in the uplink, i.e. towards network} - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present application discloses a random access method and apparatus. The method includes: grouping, by a network device, available random access resources into a plurality of random access resource groups; sending, by the network device, information about the plurality of random access resource groups to a terminal device; receiving, by the network device, a random access request that is sent by the terminal device based on the information about the plurality of random access resources groups; determining, by the network device, a target random access resource group to which a random access resource used for the random access request belongs; and determining, by the network device, an uplink transmission capability of the terminal device based on the target random access resource group. ## Claims ### Claim 1 A random access method, comprising: receiving, by a terminal device, 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; determining, by the terminal device, from the plurality of random access resource groups, based on an uplink transmission capability of the terminal device, the coverage level of the terminal device, and the information about the plurality of random access resource groups, a target random access resource group that matches the uplink transmission capability of the terminal device; and sending, by the terminal device, 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 configured to request to access the network device; 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. ### Claim 2 (depends on 1) The method according to claim 1, wherein the random access resource comprises at least one of a random access preamble sequence, a time resource, or a frequency resource. ### Claim 3 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. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein the processor coupled to the memory to execute the instructions to: perform scheduling for the terminal device based on the uplink transmission capability of the terminal device. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the processor coupled to the memory to execute the instructions to: perform scheduling for the terminal device based on the uplink transmission capability of the terminal device and a current uplink resource usage status. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein the processor coupled to the memory to execute the instructions to: send scheduling information to the terminal device in a case that a current uplink resource of the apparatus is insufficient for the terminal device to use multi-carrier transmission and the uplink transmission capability of the terminal device indicates that the terminal device is capable of supporting multi-carrier transmission, wherein the scheduling information is used to instruct the terminal device to use single-carrier transmission. ### Claim 7 (depends on 3) The apparatus according to claim 3, wherein the random access resource comprises at least one of a random access preamble sequence, a time resource, or a frequency resource. ### Claim 8 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. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein the random access resource comprises at least one of a random access preamble sequence, a time resource, or a frequency resource.