Techniques for dynamic time duplex division with reservation signal and contention

A first network node, comprising:

• a memory storing instructions;
• and
• one or more processors coupled with the memory and configured to execute the instructions to:
• select a first resource to reserve for use of a downlink (DL) transmission or an uplink (UL) transmission;
• and
• transmit, to a second network node, a reservation signal on a reservation signal resource to announce that the first resource is reserved for use of the DL transmission or the UL transmission by the first network node, wherein the reservation signal resource is associated with the first resource and includes a system frame number (SFN) to indicate the DL transmission or the UL transmission.