Method of transmitting random access response message, method of receiving random access response message and devices thereof

A method of receiving a random access response message, comprising:

• receiving, by a User Equipment (UE), a first message returned by a network side after sending a random access request, wherein the first message consists of a plurality of message units arranged in sequence, each message unit comprising a message sub-header and a RAR sub-message corresponding to the message sub-header, wherein the message sub-header comprises sub-message format indication information configured to indicate a format of the RAR sub-message;
• and
• decoding, by the UE, the RAR sub-message based on the format indicated by the sub-message format indication information;
• wherein the random access request sent by the UE comprises a preamble code reported by the UE, and the message sub-header further comprises information of at least one preamble code, the information of the preamble code is the preamble code.

A device of receiving a random access response message, comprising:

• a memory, a processor and a computer program stored in the memory and executable by the processor, wherein the processor executes the computer program to:
• receive a first message returned by a network side after sending a random access request, wherein the first message consists of a plurality of message units arranged in sequence, each message unit comprising a message sub-header and a RAR sub-message corresponding to the message sub-header, wherein the message sub-header comprises sub-message format indication information configured to indicate a format of the RAR sub-message;
• and
• decode the RAR sub-message based on the format indicated by the sub-message format indication information;
• wherein the random access request sent to the network side comprises a preamble code reported to the network side, and the message sub-header further comprises information of at least one preamble code, the information of the preamble code is the preamble code.