MBMS and PMCH in unlicensed bands
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHavish Koorapaty, Jung-Fu Cheng, Amitav Mukherjee
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Abstract
Systems and methods are disclosed that enable multi-cast transmissions (e.g., Physical Multi-cast Channel (PMCH) transmissions) on carriers in unlicensed spectrum. In some embodiments, a method of operation of a radio access node to enable multi-cast transmissions on a carrier in an unlicensed spectrum comprises performing a Listen-Before-Talk (LBT) procedure on a carrier in an unlicensed spectrum based on random backoff and a contention window size prior to a multi-cast transmission. The method further comprises transmitting the multi-cast transmission if the LBT procedure determines that the carrier in the unlicensed spectrum is Idle. In this manner, multi-cast transmissions on the carrier in the unlicensed spectrum are enabled.
Claims12
A method of operation of a radio access node to enable multi-cast transmissions on a carrier in an unlicensed spectrum, comprising:
- performing a Listen-Before-Talk, LBT, procedure on a carrier in an unlicensed spectrum based on random backoff and a contention window size prior to a multi-cast transmission;
- and
- transmitting the multi-cast transmission if the LBT procedure determines that the carrier in the unlicensed spectrum is Idle;
- wherein a backoff counter for the LBT procedure is determined based on reception of preambles from radio access nodes of a same or different technology.
Dependencies are inferred from the claim text.