Updating mission critical video communications

A method comprising:

• determining, by a wireless device, a change in a signal quality measurement of a wireless network;
• transmitting, from the wireless device to a mission-critical video (MCVideo) application function (AF) and in response to the determining, a session initiation protocol message for changing one or more media for an MCVideo call in the wireless network;
• receiving, by a policy and charging rules function (PCRF) from the MCVideo AF, a DIAMETER AA-request (AAR) command, wherein the DIAMETER AAR command comprises:
• a modification bearer message for modifying a quality of service (QoS) of the MCVideo call in the wireless network;
• and
• an application identifier attribute-value pairs (AVP) corresponding to the MCVideo call;
• and
• transmitting, from the PCRF to a policy and charging enforcement function (PCEF), an implementation message comprising an updated QoS;
• implementing, by the PCEF, the updated QoS for the MCVideo call in the wireless network, wherein the updated QoS:
• comprises QoS data bearer modification information;
• and
• depends on the change in the signal quality measurement of the wireless network.