Method to transmit downlink signaling message on cellular systems for packet transmission and method for receiving the message

An apparatus for wireless communication, the apparatus comprising:

• a memory;
• and
• a processor operably coupled to the memory, wherein the processor, when executing program stored in the memory, is configured to:
• cause the apparatus to transmit a random access preamble to a base station;
• determine an identifier at least based on when the random access preamble is transmitted;
• cause the apparatus to receive first information through a first channel;
• determine that the identifier is used in the first information;
• and
• cause the apparatus to acquire a random access response based on the first information, in response to the identifier being used in the first information, wherein the random access response is received from the base station through a second channel,
• wherein the processor is configured to determine the identifier before receiving the first information.

A communication method, the method comprising:

• receiving, by a communication apparatus, a random access preamble from a user equipment (UE);
• determining, by the communication apparatus, an identifier at least based on when the random access preamble is received;
• transmitting, by the communication apparatus, first information to the UE through a first channel, wherein the identifier is used in the first information;
• and
• transmitting a random access response to the UE through a second channel,
• wherein the first information is used by the UE to acquire the random access response.

A communication apparatus, comprising:

• a memory;
• and
• a processor operably coupled to the memory,
• wherein the processor, when executing program instructions stored in the memory, is configured to:
• cause the apparatus to receive a random access preamble from a user equipment (UE);
• determine an identifier at least based on when the random access preamble is received;
• cause the apparatus to transmit first information to the UE through a first channel, wherein the identifier is used in the first information;
• and
• cause the apparatus to transmit a random access response to the UE through a second channel,
• wherein the first information is used by the UE to acquire the random access response.

A communication device for a user equipment (UE), the device comprising:

• a memory;
• and
• a processor operably coupled to the memory, wherein the processor, when executing program stored in the memory, is configured to:
• cause the UE to transmit a random access preamble to a base station;
• determine an identifier at least based on when the random access preamble is transmitted;
• cause the UE to receive first information through a first channel;
• determine that the identifier is used in the first information;
• and
• cause the UE to acquire a random access response based on the first information, in response to the identifier being used in the first information, wherein the random access response is received from the base station through a second channel,
• wherein the processor is configured to determine the identifier before receiving the first information.