Transmitting methods of a signal on a random access channel in a wireless communication system
A transmitting method of a signal on a random access channel in a wireless communication system, comprises the steps that: a terminal transmits a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot, and the length of the preamble is the length of two symbols without a cyclic prefix. Another transmitting method of a signal on a random access channel in a wireless communication system, comprises the steps that: a terminal transmits a cyclic prefix and a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot, and the length of the preamble is the length of two symbols without a cyclic prefix. The methods can avoid the interference of the preamble to the data of the uplink subframe, and can improve the coverage area of the random access channel and the work efficiency of the time division duplex system.
1. A transmitting method of a signal on a random access channel in a wireless communication system, a terminal transmitting a cyclic prefix and a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot in order, and the length of the preamble being the length of two symbols without a cyclic prefix;
wherein the set time length is n×Ts+Tcp, wherein n×Ts is the length of the uplink pilot time slot, Tcp is the length of the cyclic prefix, and Ts=1/30.72 us, and
wherein the length of the cyclic prefix is Tcp=m×Ts−Tpre+Tds, wherein m×Ts is the length of the symbol with the cyclic prefix in the uplink pilot time slot occupied by the random access channel, Tds is the length of the largest delay extension on a multi-path channel transmitted in order under the cyclic prefix and the preamble application environment in the uplink pilot time slot, its unit is us, Tpre=4096×Ts, and Ts=1/30.72 us.
2. The method according to claim 1 , wherein,
the length of said one symbol without the cyclic prefix is a half of the length of the preamble Tpre, i.e. Tpre/2, wherein Tpre=4096×Ts, and wherein Ts=1/30.72 us.
3. The method according to claim 1 , wherein,
the length of the cyclic prefix is Tcp=(m×Ts−Tpre)/2+Tds/2, wherein m×Ts is the length of the symbol with the cyclic prefix in the uplink pilot time slot occupied by the random access channel, Tds is the length of the largest delay extension on a multi-path channel transmitted in order under the cyclic prefix and the preamble application environment in the uplink pilot time slot, its unit is us, Tpre=4096×Ts, and Ts=1/30.72 us.
4. The method according to claim 1 , wherein, the random access channel is transmitted in one of the following manners:
the length of the uplink pilot time slot is equal to 4400×Ts, Tcp=304×Ts, and the set time length is 4704×Ts; or
the length of the uplink pilot time slot is equal to 4384×Ts, Tcp=288×Ts, and the set time length is 4672×Ts; or
the length of the uplink pilot time slot is equal to 4416×Ts, Tcp=320×Ts, and the set time length is 4736×Ts; or
the length of the uplink pilot time slot is equal to 4400×Ts, Tcp=464×Ts, and the set time length is 4864×Ts; or
the length of the uplink pilot time slot is equal to 4384×Ts, Tcp=448×Ts, and the set time length is 4832×Ts; or
the length of the uplink pilot time slot is equal to 4416×Ts, Tcp=480×Ts, and the set time length is 4896×Ts; or
the length of the uplink pilot time slot is equal to 4400×Ts, Tcp=448×Ts, and the set time length is 4848×Ts; or
the length of the uplink pilot time slot is equal to 4384×Ts, Tcp=432×Ts, and the set time length is 4816×Ts; or
the length of the uplink pilot time slot is equal to 4416×Ts, Tcp=464×Ts, and the set time length is 4880×Ts.
5. The method according to claim 1 , wherein,
the wireless communication system is long term evolution system with time division duplex mode, and the symbols are orthogonal frequency division multiple symbols.
6. The method according to claim 2 , wherein,
the wireless communication system is long term evolution system with time division duplex mode, and the symbols are orthogonal frequency division multiple symbols.
7. The method according to claim 4 , wherein,
the wireless communication system is long term evolution system with time division duplex mode, and the symbols are orthogonal frequency division multiple symbols.