Methods and Devices for Random Access

A method for operating a communication device, comprising:

• sending to a network node device a first message including a random access preamble according to a Time Division Duplex, TDD, configuration in a system information block;
• receiving from said network node device a second message including a random access response using said random access preamble according to said TDD configuration in said system information block;
• wherein said communication device is assigned more than one TDD configurations before initiating a random access procedure and said more than one TDD configurations include said TDD configuration in said system information block and further include at least another TDD configuration informed via dedicated Radio Resource Control signaling.

A method for operating a network node device, comprising:

• receiving from a communication device a first message including a random access preamble according to a TDD configuration in a system information block;
• sending to said communication device a second message including a random access response using said random access preamble according to said TDD configuration in said system information block, wherein said communication device is assigned more than one TDD configurations before a random access procedure and wherein said more than one TDD configurations include said TDD configuration in said system information block and further include at least another TDD configuration informed via dedicated Radio Resource Control signaling.

A communication device, comprising:

• a sending unit configured to send to a network node device a first message including a random access preamble according to a Time Division Duplex, TDD, configuration in a system information block;
• a receiving unit configured to receive from said network node device a second message including a random access response using said random access preamble according to said TDD configuration in said system information block, wherein said communication device has more than one TDD configurations before initiating a random access procedure and said more than one TDD configurations include said TDD configuration in said system information block and further include at least another TDD configuration informed via dedicated Radio Resource Control signaling.