# US 2019/0357263 A1 · Resource mapping method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357263 A1 - Document ID: US20190357263A1 - Status: Published application - Kind: A1 - Application number: 16/458,182 - Filed: 2019-06-30 - Published: 2019-11-21 - Earliest claimed: 2016-12-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd - Inventors: Pu YUAN; Jun LUO; Jin LIU - Web page: https://patentgrep.com/patent/US20190357263A1 ## CPC - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04B 7/0617: {for beam forming} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Embodiments can provide a random access method. In this method, a preamble sequence can be sent by user equipment (UE), and a random access response can be received by the UE. The random access response includes information for sending a message 3, and the information for sending the message 3 is used by the user equipment to determine a beam for sending the message 3. The beam for sending the message 3 can then be determined based on the information for sending the message 3. The message 3 can be sent by using the determined beam. ## Claims ### Claim 1 A random access method, comprising: sending, by user equipment, a preamble sequence; receiving, by the user equipment, a random access response, wherein the random access response comprises information for sending a message, and the information for sending the message is used by the user equipment to determine a beam for sending the message; determining, by the user equipment based on the information for sending the message, the beam for sending the message; and sending, by the user equipment, the message by using the determined beam. ### Claim 2 (depends on 1) The method according to claim 1, wherein the information for sending the message comprises port information; and determining, by the user equipment based on the information for sending the message, the beam for sending the message comprises: determining, by the user equipment based on the port information, the beam for sending the message. ### Claim 3 (depends on 2) The method according to claim 2, wherein determining, by the user equipment based on the port information, the beam for sending the message comprises: determining, by the user equipment based on the port information, sending time information for sending the message, and determining, based on the sending time information, the beam for sending the message. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: determining, by the user equipment based on the port information, a time-frequency resource for sending the message, wherein sending, by the user equipment, the message by using the determined beam comprises: sending, by the user equipment, the message based on the determined time-frequency resource and beam for sending the message. ### Claim 5 (depends on 1) The method according to claim 1, wherein the information for sending the message comprises sending time information; and determining, by the user equipment based on the information for sending the message, the beam for sending the message comprises: determining, by the user equipment based on the sending time information, the beam for sending the message. ### Claim 6 (depends on 5) The method according to claim 5, wherein the information for sending the message further comprises port information; the user equipment determines, based on the port information, a time-frequency resource for sending the message; and sending, by the user equipment, the message by using the determined beam comprises: sending, by the user equipment, the message based on the determined time-frequency resource and beam for sending the message. ### Claim 7 (depends on 1) The method according to claim 1, wherein the information for sending the message comprises beam information; and determining, by the user equipment based on the information for sending the message, the beam for sending the message comprises: determining, by the user equipment based on the beam information, the beam for sending the message. ### Claim 8 (depends on 1) The method according to claim 1, wherein the information for sending the message comprises network device information and beam information that is used by a network device to receive the preamble sequence; and determining, by the user equipment based on the information for sending the message, the beam for sending the message comprises: determining, by the user equipment based on the network device information and the beam information that is used by the network device to receive the preamble sequence, the beam for sending the message. ### Claim 9 (depends on 1) The method according to claim 1, wherein the random access response is sent by one or more of a first network device, wherein the first network device is configured to send the random access response to the user equipment. ### Claim 10 (depends on 9) The method according to claim 9, wherein the method is applied to a high frequency scenario. ### Claim 11 (depends on 10) The method according to claim 10, wherein the method is used in a communications network, the communications network comprising a first network device and a second network device, wherein the second network device is configured to receive the message sent by the user equipment but does not send the random access response. ### Claim 12 A random access method, comprising: sending, by a first network device, a random access response, wherein the random access response comprises information for sending a message, and the information for sending the message is used by user equipment to determine a beam for sending the message. ### Claim 13 (depends on 12) The method according to claim 12, wherein the information for sending the message comprises port information, and the port information is used to determine the beam for sending the message. ### Claim 14 (depends on 13) The method according to claim 13, wherein determining the beam for sending the message comprises: determining, based on the port information, sending time information for sending the message, and determining, based on the sending time information, the beam for sending the message. ### Claim 15 (depends on 12) The method according to claim 12, wherein the port information is further used to determine a time-frequency resource for sending the message. ### Claim 16 (depends on 12) The method according to claim 12, wherein the information for sending the message comprises sending time information, and the sending time information is for determining the beam for sending the message 3. ### Claim 17 (depends on 16) The method according to claim 16, wherein the information for sending the message further comprises port information, and the port information is for determining a time-frequency resource for sending the message 3. ### Claim 18 (depends on 12) The method according to claim 12, wherein the information for sending the message comprises beam information, and the beam information is used to determine the beam for sending the message. ### Claim 19 (depends on 12) The method according to claim 12, wherein the information for sending the message comprises network device information and beam information that is used by a network device to receive a preamble sequence, and the network device information and the beam information that is used by the network device to receive the preamble sequence are used to determine the beam for sending the message.