Methods and devices for multi-connection transmission

A terminal device for transmission to at least a first network device and a second network device over bundled Transmission Time Intervals (TTIs) comprising:

• a processor;
• and
• a memory coupled to the processor, the memory containing instructions which, when executed by the processor, cause the terminal device to:
• determine that a first TTI for transmission to the first network device overlaps a second TTI for transmission to the second network device based on a first Timing Advance (TA) value associated with the first network device and a second TA value associated with the second network device;
• request from the first and second network devices a first and a second transmission grants, respectively, based on the first and second TA values, such that an order of the first and second transmission grants requested is based on values of the first and second TA values;
• receive the first and second transmission grants from the first and second network devices, respectively, in the order based on the first and second TA values;
• and
• transmit data to the first and second network devices in accordance with the order of the first and second transmission grants.

A non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor of a terminal device for transmission to at least a first network device and a second network device over bundled Transmission Time Intervals (TTIs), is configured to cause the terminal device to perform operations comprising:

• determining that a first TTI for transmission to the first network device overlaps a second TTI for transmission to the second network device based on a first Timing Advance (TA) value associated with the first network device and a second TA value associated with the second network device;
• requesting from the first and second network devices a first and a second transmission grants, respectively, based on the first and second TA values, such that an order of the first and second transmission grants requested is based on values of the first and second TA values;
• receiving the first and second transmission grants from the first and second network devices, respectively, in the order based on the first and second TA values;
• and
• transmitting data to the first and second network devices in accordance with the order of the first and second transmission grants.