Distributed control in wireless systems

A wireless transmit/receive unit (WTRU) in communication with a communication network, the WTRU comprising:

• a memory;
• a processor, the processor configured at least to:
• determine to request one or more system information (SI) messages from the communication network;
• conduct a beam sweep operation of one or more downlink (DL) beams transmitted from the communication network;
• identify at least one DL beam of the one or more DL beams via which to receive the one or more on-demand SI messages based at least in part on the beam sweep operation;
• determine one or more uplink (UL) resources with which to communicate information for a WTRU reception of the one or more on-demand SI messages, the information for the WTRU reception including the at least one DL beam;
• and
• initiate the request for the one or more on-demand SI messages from the communication network;
• and
• a transceiver, the transceiver configured at least to:
• send the request for the one or more on-demand SI messages to the communication network using the one or more UL resources, the request including the information for the WTRU reception of the one or more on-demand SI messages;
• and
• receive at least one of the one or more on-demand SI messages from the communication network via the at least one DL beam.

A wireless transmit/receive unit (WTRU) in communication with a communication network, the WTRU comprising:

• a memory;
• a transceiver, the transceiver configured at least to:
• receive system information (SI) from the communication network at a first-time instance;
• and
• a processor, the processor configured at least to:
• determine a first-reference identifier (ID) that corresponds to at least some of the SI of the first-time instance;
• determine a first-value identifier (ID) that corresponds to the at least some of the SI of the first-time instance;
• associate at least one of:
• the first-reference ID, or the first-value ID with the at least some of the SI of the first-time instance;
• utilize the at least some of the SI of the first-time instance in communication with the communication network;
• search the memory for stored SI of a previous-time instance that is associated with the same first-reference ID of the at least some of the SI of the first-time instance;
• store the at least some of the SI of the first-time instance upon no stored SI of the previous-time instance associated with the same first-reference ID being found;
• and
• replace stored SI of the previous-time instance associated with the same first-reference ID with the at least some of the SI of the first-time instance upon a value ID associated with the stored SI of the previous-time instance associated with the same first-reference ID being different from the first-value ID.

A wireless transmit/receive unit (WTRU) in communication with a communication network, the WTRU comprising:

• a memory;
• a processor, the processor configured at least to:
• determine to request other system information (other-SI) from the communication network;
• initiate the request for the other-SI from the communication network as part of a Random Access Channel (RACH) procedure;
• and
• a transceiver, the transceiver configured at least to:
• transmit a RACH signal, the RACH signal including the request for the other-SI in a random access preamble of the RACH signal, the processor being further configured to:
• monitor for a message that includes a minimum SI from the communication network for a predetermined period of time following the transmission of the RACH signal;
• determine if the requested other-SI is included in the message that includes the minimum SI upon a detection of the message that includes the minimum SI;
• and
• initiate one or more retransmissions of the RACH signal upon at least one of:
• the message that includes the minimum SI not being detected, or the other-SI is determined to not be included in a detected message that includes the minimum SI.