US Patent No. 10,716,157

5G/LTE DUAL CONNECTIVITY


Patent No. 10,716,157
Issue Date July 14, 2020
Title 5g/lte Dual Connectivity
Inventorship Farouk Belghoul, Campbell, CA (US)
Christian W. Mucke, Cupertino, CA (US)
Lydi Smaini, San Jose, CA (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 10,716,157

1. A user equipment device (UE), comprising:a first radio in communication with a first antenna, wherein the first radio is configured to perform cellular communication according to a first radio access technology (RAT);
a second radio in communication with a second antenna, wherein the second radio is configured to perform cellular communication according to a second RAT;
a switch coupled to the first and second radios;
a third antenna coupled to the switch, wherein a first state of the switch enables communication between the first radio and the third antenna, wherein a second state of the switch enables communication between the second radio and the third antenna; and
one or more processors coupled to the first and second radios, wherein the one or more processors and the first and second radios are configured to perform voice and/or data communications;
wherein the one or more processors are configured to cause the UE to:
couple the third antenna to the first radio via the switch;
transmit, via the first radio while the switch is in the first state, a request to attach to a first network node operating according to the first RAT;
transmit, via the first radio while the switch is in the first state, signaling indicating that the UE is capable of maintaining concurrent downlink (DL) connections with the first network node and a second network node, and wherein the second network node operates according to the second RAT, wherein the DL connections are maintained via the first radio and the second radio;
couple the third antenna to the second radio via the switch;
transmit, via the second radio while the switch is in the second state, signaling to attach to the second network node;
receive, via the first receive chain, uplink and downlink grants from the first network node in a dual connectivity configuration with the first and second network nodes; and
receive, via the second receive chain, uplink and downlink grants from the second network node in the dual connectivity configuration with the first and second network nodes, wherein a portion of downlink subframes are not available for downlink transmissions from the first network node to accommodate potential uplink transmissions to the second network node.