Method for transmitting and receiving signals based on segmented access scheme and method for allocating sequence for the same
A segmented access based signal transmitting/receiving method and a sequence allocating method for the same are disclosed. According to one embodiment of the present invention, a method of transmitting a signal of a user equipment in a communication system includes selecting a channel in accordance with at least one selected from the group consisting of a signal attenuation extent of a downlink signal to the αser equipment and a speed of the user equipment from channels differently provided based on at least one selected from the group consisting of the signal attenuation extent of the downlink signal and the speed of the user equipment and transmitting the signal using the selected channel.
1. A method for a specific user equipment (UE) to transmit a signal via a random access channel, the method comprising:
selecting one random access preamble sequence set from among predetermined random access preamble sequence sets considering at least one of a size of information to be transmitted by the specific UE and a degree of a path loss;
randomly selecting a specific sequence within the selected random access preamble sequence set; and
transmitting the selected sequence via the random access channel.
2. The method of claim 1 , wherein the specific sequence is a CAZAC (Constant Amplitude Zero Auto Correlation) sequence.
3. The method of claim 1 , wherein the path loss is determined as a path loss of a downlink signal.
4. The method of claim 1 , wherein the degree of the path loss is determined in accordance with a intra-cell location of the specific user equipment.
5. The method of claim 1 , wherein the predetermined random access preamble sequence sets are pre-allocated by being additionally discriminated in accordance with a cause for each user equipment to access the random access channel.
6. The method of claim 5 ,
wherein the information to be transmitted by the specific user equipment comprises at least one of information on the cause to access the random access channel, a random ID, and a channel quality indicator (CQI).
7. The method of claim 5 , wherein the cause to access the random access channel comprises a handoff, a power-on, a resource request, and a synchronization acquisition.
8. An apparatus for transmitting a signal, the apparatus comprising:
a sequence selecting module acquiring information about predetermined two or more random access preamble sequence sets, selecting one random access preamble sequence set from among the predetermined random access preamble sequence sets considering at least one of a size of information to be transmitted by the apparatus and a degree of a path loss, and randomly selecting a specific sequence within the selected random access sequence set; and
an access module accessing a random access channel using the specific sequence selected by the sequence selecting module.
9. The apparatus of claim 8 , wherein the specific sequence is a CAZAC (Constant Amplitude Zero Auto Correlation) sequence.
10. The apparatus of claim 8 , wherein the degree of the path loss is determined in accordance with an intra-cell location of the apparatus.
11. The apparatus of claim 8 , wherein the predetermined random access preamble sequence sets are pre-allocated by being additionally discriminated in accordance with a cause for each user equipment to access the random access channel.