Method for transmitting random access signal and related products

A user equipment, comprising:

• a processor, a memory, a radio frequency chip and a program, wherein the program is stored in the memory and configured to be executed by the processor, and the program comprises an instruction used to perform steps of:
• determining at least one item of serial number information indicated by a network side device, wherein the at least one item of serial number information is transmitted by the network side device to the user equipment, and wherein the at least one item of serial number information is associated with a resource indicator of at least one channel state information reference signal (CSI-RS) and with at least one random access resource subset;
• measuring the at least one CSI-RS to select a CSI-RS, and selecting a preamble from a random access resource subset corresponding to the selected CSI-RS;
• and
• transmitting the selected preamble;
• wherein the program further comprises an instruction used to perform steps of:
• determining serial number information corresponding to the selected CSI-RS according to a first mapping relationship set between serial number information and a resource indicator of a CSI-RS;
• and
• determining the random access resource subset corresponding to the selected CSI-RS according to a preset second mapping relationship set between serial number information and a random access resource subset;
• wherein the serial number information is a dedicated number or a sequence number of each CSI-RS in at least one CSI-RS signal pre-configured by the network side device for the user equipment or in at least one CSI-RS signal measurement activated by the network side device for the user equipment.

A network side device, comprising:

• a processor, a memory, a communication interface and a program, wherein the program is stored in the memory and configured to be executed by the processor, and the program comprises an instruction for performing steps of:
• indicating and transmitting at least one item of serial number information to a user equipment, wherein the at least one item of serial number information is associated with a resource indicator of at least one channel state information reference signal (CSI-RS) and with at least one random access resource subset;
• and
• receiving a preamble sent by the user equipment, wherein the preamble is selected by the user equipment from a random access resource subset corresponding to a selected CSI-RS, and the selected CSI-RS is selected by measuring the at least one CSI-RS;
• wherein the random access resource subset corresponding to the selected CSI-RS is determined by the user equipment according to a preset second mapping relationship between serial number information and a random access resource subset, wherein serial number information corresponding to the selected CSI-RS is determined by the user equipment according to a first mapping relationship set between serial number information and a resource indicator of a CSI-RS;
• wherein the serial number information is a dedicated number or a sequence number of each CSI-RS in at least one CSI-RS signal pre-configured by the network side device for the user equipment or in at least one CSI-RS signal measurement activated by the network side device for the user equipment.