Radio communication terminal devices and methods for random access

Abstract

A terminal apparatus includes processing circuitry to duplicate a transmission packet to generate duplicated transmission packets and to assign the duplicated transmission packets to a subcarrier resource for a random access channel. A transmitter in the terminal transmits the duplicated transmission packets using the subcarrier resource for the random access channel.

1 . A radio communication terminal apparatus comprising:
 processing circuitry configured to duplicate a transmission packet to generate duplicated transmission packets and to assign the duplicated transmission packets to a subcarrier resource for a random access channel; and   a transmitter configured to transmit the duplicated transmission packets using the subcarrier resource for the random access channel.   
     
     
         2 . The radio communication terminal apparatus according to  claim 1 , wherein the processing circuitry is configured to assign the duplicated transmission packets to at least one of a plurality of antennas for transmission over the subcarrier resource in the random access channel. 
     
     
         3 . The radio communication terminal apparatus according to  claim 1 , wherein the duplicated transmission packets include two or more duplicated transmission packets. 
     
     
         4 . The radio communication terminal apparatus according to  claim 1 , wherein the processing circuitry is configured to assign at least two of the duplicated transmission packets to two consecutive time slots in the random access channel. 
     
     
         5 . The radio communication terminal apparatus according to  claim 1 , wherein the subcarrier resource includes one or both of a timing or a spreading code in addition to a transmission frequency. 
     
     
         6 . The radio communication terminal apparatus according to  claim 1 , wherein the processing circuitry is configured to assign the duplicated transmission packets on at least two resources which are on the same subcarrier for the random access channel. 
     
     
         7 . The radio communication terminal apparatus according to  claim 1 , wherein the transmitter is configured to transmit the duplicated transmission packets using the subcarrier resource for the random access channel without waiting for a response from a base station to confirm whether transmission packets transmitted on the random access channel are received at the base station. 
     
     
         8 . A random access method comprising:
 duplicating a transmission packet to generate duplicated transmission packets;   assigning the duplicated transmission packets to a subcarrier resource in a random access channel; and   transmitting the duplicated transmission packets using the subcarrier resource for the random access channel.   
     
     
         9 . The random access method according to  claim 8 , wherein the assigning includes assigning the duplicated transmission packets to at least one of a plurality of antennas for transmission over the subcarrier resource for the random access channel. 
     
     
         10 . The random access method according to  claim 8 , wherein the duplicated transmission packets include two or more duplicated transmission packets. 
     
     
         11 . The random access method according to  claim 8 , wherein the assigning includes assigning at least two of the duplicated transmission packets to two consecutive time slots for the random access channel. 
     
     
         12 . The random access method according to  claim 8 , wherein the subcarrier resource includes one or both of a timing or a spreading code in addition to a transmission frequency. 
     
     
         13 . The random access method according to  claim 8 , wherein the assigning includes assigning the duplicated transmission packets on at least two resources which are on the same subcarrier for the random access channel. 
     
     
         14 . The random access method according to  claim 8 , wherein the transmitting includes transmitting the duplicated transmission packets using the subcarrier resource for the random access channel without waiting for a response from a base station to confirm whether transmission packets transmitted on the random access channel are received at the base station.