Method to transmit downlink signaling message on cellular systems for packet transmission and method for receiving the message
Provided is a downlink control information transmitting and receiving method which can maximize the use of limited radio resources by effectively forming an uplink signaling message to be transmitted from a base station to a terminal and transmitting the formed uplink signaling message with a minimum amount of radio resources occupied. The method for transmitting downlink data generation indication information for a base station to inform a terminal of packet data transmission in a packet-based cellular system, includes the steps of: a) generating the downlink data generation indication information; b) recording radio resource allocation information in downlink scheduling information for transmitting the downlink data generation indication information, and allocating information for the downlink data generation indication information to downlink-shared radio resources; and c) transmitting the downlink scheduling information and the information for the downlink data generation indication information according to a transmission cycle.
1. A communication method in a wireless communication system, the method comprising:
transmitting, by a user equipment (UE), a random access preamble to a base station;
determining, by the UE, an identifier at least based on when the random access preamble is transmitted;
receiving, by the UE, first information through a first channel;
determining, by the UE, that the identifier is used in the first information; and
in response to the identifier being used in the first information, acquiring, by the UE, a random access response based on the first information, wherein the random access response is received from the base station through a second channel,
wherein the UE determines the identifier before receiving the first information.
2. The method of claim 1 , wherein the identifier identifies the UE and another UE in a cell to which the UE is connected.
3. The method of claim 1 , wherein the first channel is used to transmit downlink scheduling information, and the second channel is used to transmit data using shared radio resources.
4. The method of claim 1 , wherein the first channel is a downlink control channel, and the second channel is a downlink shared channel for data.
5. The method of claim 1 , wherein the first information indicates a location of the random access response.
6. The method of claim 5 , wherein the first information and at least a part of the random access response are received within a single time slot, and the single time slot has a length of 0.5 milliseconds.
7. The method of claim 1 , wherein the identifier is determined also based on at which frequency the random access preamble is transmitted.
8. The method of claim 1 , wherein the random access response comprises another identifier which identifies the UE, and the identifier consists of an identical number of bits to that of the another identifier.
9. The communication method of claim 1 , wherein the identifier is not transmitted by the UE.
10. 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.
11. The apparatus of claim 10 , wherein the identifier identifies the apparatus and another user equipment (UE) in a cell to which the apparatus is connected.
12. The apparatus of claim 10 , wherein the first channel is used to transmit downlink scheduling information, and the second channel is used to transmit data using shared radio resources.
13. The apparatus of claim 10 , wherein the first channel is a downlink control channel, and the second channel is a downlink shared channel for data.
14. The apparatus of claim 10 ,
wherein the first information indicates a location of the random access response.
15. The apparatus of claim 14 , wherein the first information and at least a part of the random access response are received within a single time slot, and the single time slot has a length of 0.5 milliseconds.
16. The apparatus of claim 10 , wherein the identifier is determined also based on at which frequency the random access preamble is transmitted.
17. The apparatus of claim 10 , wherein the random access response comprises another identifier which identifies the UE, and the identifier consists of an identical number of bits to that of the another identifier.
18. The apparatus of claim 10 , wherein the identifier is not transmitted by the apparatus.
19. 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.
20. The method of claim 19 , wherein the identifier identifies the UE and another UE in a cell to which the UE is connected.
21. The method of claim 19 , wherein the first channel is used to transmit downlink scheduling information, and the second channel is used to transmit data using shared radio resources.
22. The method of claim 19 , wherein the first channel is a downlink control channel, and the second channel is a downlink shared channel for data.
23. The method of claim 19 ,
wherein the first information indicates a location of the random access response.
24. The method of claim 23 , wherein the first information and at least a part of the random access response are transmitted within a single time slot, and the single time slot has a length of 0.5 milliseconds.
25. The method of claim 19 , wherein the identifier is determined also based on at which frequency the random access preamble is received.
26. The method of claim 19 , wherein the random access response comprises another identifier which identifies the UE, and the identifier consists of an identical number of bits to that of the another identifier.
27. The method of claim 19 , wherein the identifier is not received from the UE.
28. 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.
29. The apparatus of claim 28 , the identifier identifies the UE and another UE in a cell to which the UE is connected.
30. The apparatus of claim 28 , wherein the first channel is used to transmit downlink scheduling information, and the second channel is used to transmit data using shared radio resources.
31. The apparatus of claim 28 , wherein the first channel is a downlink control channel, and the second channel is a downlink shared channel for data.
32. The apparatus of claim 28 , wherein the first information indicates a location of the random access response.
33. The apparatus of claim 32 , wherein the first information and at least a part of the random access response are transmitted within a single time slot, and the single time slot has a length of 0.5 milliseconds.
34. The apparatus of claim 28 , wherein the identifier is determined also based on at which frequency the random access preamble is received.
35. The apparatus of claim 28 , wherein the random access response comprises another identifier which identifies the UE, and the identifier consists of an identical number of bits to that of the another identifier.
36. The apparatus of claim 28 , wherein the identifier is not received from the UE.
37. 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.
38. The device of claim 37 , wherein the identifier identifies the UE and another UE in a cell to which the UE is connected.
39. The device of claim 37 , wherein the first channel is used to transmit downlink scheduling information, and the second channel is used to transmit data using shared radio resources.
40. The device of claim 37 , wherein the first channel is a downlink control channel, and the second channel is a downlink shared channel for data.
41. The device of claim 37 ,
wherein the first information indicates a location of the random access response.
42. The device of claim 41 , wherein the first information and at least a part of the random access response are received within a single time slot, and the single time slot has a length of 0.5 milliseconds.
43. The device of claim 37 , wherein the identifier is determined also based on at which frequency the random access preamble is transmitted.
44. The device of claim 37 , wherein the random access response comprises another identifier which identifies the UE, and the identifier consists of an identical number of bits to that of the another identifier.
45. The device of claim 37 , wherein the identifier is not transmitted by the UE.