Random access enhancements for uRLLC over 5G wireless networks

A method of randomly accessing wireless communication resources in an uplink comprising:

• transmitting, by a user device, a first access request and a second access request wherein:
• the first access request is transmitted on a different communication channel from a plurality of communication channels, the second access request is transmitted on a second communication channel from the communication channels, the first communication channel being different from the second communication channel, and
• the first access request comprises a first preamble generated using a first root sequence, and the second request comprises a second preamble generated using a second root sequence, the first root sequence being different from the second root sequence;
• receiving, at the user device, at least one access response via the communication channels;
• completing an access procedure on one of the first communication channel or the second communication channel which conveyed the access response;
• and
• receiving two or more access responses and completing an access procedure on a communication channel which first conveyed the access response,
• wherein the first communication channel is established with a first base station from a plurality of base stations, the second communication channel is established with a second base station from the base stations, and the first base station is different from the second base station.

A method of randomly accessing wireless communication resources in an uplink comprising:

• transmitting, by a user device, a first access request and a second access request wherein:
• the first access request is transmitted on a first communication channel from a plurality of communication channels, the second access request is transmitted on a second communication channel from the communication channels, the first communication channel being different from the second communication channel, and
• the first access request comprises a first preamble generated using a first root sequence, and the second request comprises a second preamble generated using a second root sequence, the first root sequence being different from the second root sequence;
• receiving, at the user device, at least one access response via the communication channels;
• and
• completing an access procedure on one of the first communication channel or the second communication channel which conveyed the access response,
• wherein the first preamble is generated by multiplying a third preamble by a conjugate of a fourth preamble,
• wherein the third preamble is based on the first root sequence and the fourth preamble is based on a cyclic shifted version of the first root sequence.

A method of randomly accessing wireless communication resources in an uplink comprising:

• transmitting, by a user device, a first access request and a second access request wherein:
• the first access request is transmitted on a first communication channel from a plurality of communication channels, the second access request is transmitted on a second communication channel from the communication channels, the first communication channel being different from the second communication channel, and
• the first access request comprises a first preamble generated using a first root sequence, and the second request comprises a second preamble generated using a second root sequence, the first root sequence being different from the second root sequence;
• receiving, at the user device, at least one access response via the communication channels;
• completing an access procedure on one of the first communication channel or the second communication channel which conveyed the access response;
• and
• decoding the first preamble using an augmented table comprising the first root sequence and the second root sequence and possible combinations of the first root sequence and the second root sequence, wherein the first preamble is generated by multiplying a third preamble by a conjugate of a fourth preamble.

A method of operating a user device in a network comprising:

• transmitting a first access request and a second access request wherein:
• the first access request is transmitted on a first communication channel from a plurality of communication channels, the second access request is transmitted on a second communication channel from the communication channels, the first communication channel being different from the second communication channel, and
• the first access request comprises a first preamble generated using a first root sequence, and the second request comprises a second preamble generated using a second root sequence, the first root sequence being different from the second root sequence;
• receiving at least one access response via the communication channels;
• completing an access procedure on one of the first communication channel or the second communication channel which conveyed the access response;
• and
• receiving two or more access responses and completing an access procedure on a communication channel which first conveyed the access response,
• wherein the first communication channel uses a first component carrier of a base station and the second communication channel uses a second component carrier of the base station, the first component carrier being different from the second component carrier.

A method of operating a base station in a network comprising a plurality of base stations wherein the base station is operable in a master configuration and a slave configuration, the method comprising:

• receiving an access request from a user device;
• and
• in the slave configuration:
• communicating the access request and an identifier associated with the user device to a master base station;
• and
• transmitting an access response to the user device when instructed by the master base station;
• in the master configuration:
• determining a number of base stations which received an access request from the user device;
• determining, a base station from the number of base stations to transmit the access response;
• instructing the base station from the number of base stations to transmit the access response to the user device.