A Relay Gateway (R-GW) proxies Long Term Evolution (LTE) signaling in a network core for wireless relays that serve mobile User Equipment (UE). The R-GW receives relay-originated LTE signaling from the wireless relays through a data gateway system in the network core. The R-GW transfers the relay-originated LTE signaling to a UE control system in the network core. The R-GW receives core-originated LTE signaling that was transferred by the UE control system in the network core. The R-GW transfers the core-originated LTE signaling to the data gateway system for delivery to the wireless relays.