Method of transmitting data in a mobile communication system
Disclosed is a data transmission method in a mobile communication system. The data transmission method through a code sequence in a mobile communication system includes grouping input data streams into a plurality of blocks consisting of at least one bit so as to map each block to a corresponding signature sequence, multiplying a signature sequence stream, to which the plurality of blocks are mapped, by a specific code sequence, and transmitting the signature sequence stream multiplied by the specific code sequence to a receiver.
1. A method for transmitting a preamble sequence from user equipment to a base station to at least improve detection performance, the method comprising:
generating, by the user equipment, a specific sequence, having a length (L), from a Zadoff-Chu Constant Amplitude Zero Auto Correlation (CAZAC) sequence;
applying, by the user equipment, a circular shift to the specific sequence by multiplying the specific sequence by an exponential sequence;
repeating, by the user equipment, the circular-shifted specific sequence to generate a consecutive sequence having a length (N*L), wherein N is an integer greater than 1;
generating, by the user equipment, the preamble sequence by concatenating a single cyclic prefix (CP) to a front end of the consecutive sequence; and
transmitting, by the user equipment, on a random access channel, the preamble sequence to the base station to access a cellular network.
2. The method of claim 1 , wherein the preamble sequence causes a reduction in access time.
3. The method of claim 1 , wherein the random access channel allows the user equipment to access a network in a state where the user equipment is not uplink synchronized with the base station.
4. The method of claim 1 , further comprising transmitting, by the user equipment, the preamble for a predetermined time period through a frequency band.
5. The method of claim 1 , further comprising transmitting, by the user equipment, a pilot including channel quality information.
6. The method of claim 1 , wherein a preamble, synchronization timing information, pilot information, uplink resource allocation information and messages are also transmitted by the user equipment on the random access channel.
7. The method of claim 6 , wherein the preamble and the messages are separately transmitted through the random access channel.
8. The method of claim 1 , wherein the preamble is a repetitive pattern.
9. A system that transmits a preamble sequence to a base station to at least improve detection performance, the system comprising:
user equipment adapted to:
generate a specific sequence, having a length (L), from a Zadoff-Chu Constant Amplitude Zero Auto Correlation (CAZAC) sequence;
apply a circular shift to the specific sequence by multiplying the specific sequence by an exponential sequence;
repeat the circular-shifted specific sequence to generate a consecutive sequence having a length (N*L), wherein N is an integer greater than 1; and
generate the preamble sequence by concatenating a single cyclic prefix (CP) to a front end of the consecutive sequence; and
a transmitter in the user equipment adapted to transmit, on a random access channel, the preamble sequence to the base station to access a cellular network.
10. The system of claim 9 , wherein the preamble sequence causes a reduction in access time.
11. The system of claim 9 , wherein the random access channel allows the user equipment to access a network in a state where the user equipment is not uplink synchronized with the base station.
12. The system of claim 9 , wherein the user equipment is further adapted to transmit the preamble for a predetermined time period through a frequency band.
13. The system of claim 9 , wherein the user equipment is further adapted to transmit a pilot including channel quality information.
14. The system of claim 9 , wherein a preamble, synchronization timing information, pilot information, uplink resource allocation information and messages are also transmitted by the user equipment on the random access channel.
15. The system of claim 14 , wherein the user equipment is adapted to transmit the preamble and the messages separately through the random access channel.
16. The system of claim 9 , wherein the preamble is a repetitive pattern.
17. A non-transitory computer readable information storage media including instructions, that when executed by one or more processors, cause to be performed a method for transmitting a preamble sequence from user equipment to a base station to at least improve detection performance, the method comprising:
generating, by the user equipment, a specific sequence, having a length (L), from a Zadoff-Chu Constant Amplitude Zero Auto Correlation (CAZAC) sequence;
applying, by the user equipment, a circular shift to the specific sequence by multiplying the specific sequence by an exponential sequence;
repeating, by the user equipment, the circular-shifted specific sequence to generate a consecutive sequence having a length (N*L), wherein N is an integer greater than 1;
generating, by the user equipment, the preamble sequence by concatenating a single cyclic prefix (CP) to a front end of the consecutive sequence; and
transmitting, by the user equipment, on a random access channel, the preamble sequence to the base station to access a cellular network.
18. The media of claim 17 , wherein the preamble sequence causes a reduction in access time.
19. The media of claim 17 , wherein the random access channel allows the user equipment to access a network in a state where the user equipment is not uplink synchronized with the base station.
20. The media of claim 17 , wherein the method further comprises transmitting, by the user equipment, the preamble for a predetermined time period through a frequency band.
21. The media of claim 17 , wherein the method further comprises transmitting, by the user equipment, a pilot including channel quality information.
22. The media of claim 17 , wherein a preamble, synchronization timing information, pilot information, uplink resource allocation information and messages are also transmitted by the user equipment on the random access channel.
23. The media of claim 22 , wherein the method further comprises separately transmitting, by the user equipment, the preamble and the messages through the random access channel.
24. The media of claim 17 , wherein the preamble is a repetitive pattern.