Link adaptation in grant-free multiple access systems
First Claim
1. A method, comprising:
- determining an amount of resource overloading for a contention transmission unit (CTU) access region associated with a grant-free uplink transmission scheme in a multiple access system;
determining a modulation and coding scheme (MCS) limit indicating a maximum MCS level for the CTU access region based on the amount of resource overloading; and
sending the MCS limit to a plurality of user equipments (UEs) associated with the CTU access region; and
receiving an uplink transmission from a first UE of the plurality of UEs including an MCS index based on the MCS limit.
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Accused Products
Abstract
A BS determines an amount of resource overloading for a contention transmission unit (CTU) access region associated with a grant-free uplink transmission scheme in a multiple access system. The BS determines a modulation and coding scheme (MCS) limit indicating a maximum MCS level for the CTU access region. The BS sends the MCS limit to a plurality of user equipments (UEs) associated with the first CTU access region. A UE receives from the base station the MCS limit and determines a first MCS index within the MCS limit for a first uplink transmission. The UE sends the first uplink transmission to the base station using a CTU in the CTU access region. The first uplink transmission includes user data and the first MCS index determined at the first UE.
21 Citations
28 Claims
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1. A method, comprising:
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determining an amount of resource overloading for a contention transmission unit (CTU) access region associated with a grant-free uplink transmission scheme in a multiple access system; determining a modulation and coding scheme (MCS) limit indicating a maximum MCS level for the CTU access region based on the amount of resource overloading; and sending the MCS limit to a plurality of user equipments (UEs) associated with the CTU access region; and receiving an uplink transmission from a first UE of the plurality of UEs including an MCS index based on the MCS limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A base station, comprising:
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a processor; and a computer readable storage medium having instructions stored thereon for execution by the processor, wherein the instructions configure the processor to; determine an amount of resource overloading for a contention transmission unit (CTU) access region associated with a grant-free uplink transmission scheme in a multiple access system; determine a modulation and coding scheme (MCS) limit indicating a maximum MCS level for the CTU access region based on the amount of resource overloading; send the MCS limit to a plurality of user equipments (UEs) associated with the CTU access region; and receive an uplink transmission from a first UE of the plurality of UEs including an MCS index based on the MCS limit. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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determining an amount of resource overloading for a contention transmission unit (CTU) access region associated with a grant-free uplink transmission scheme in a multiple access system; determining a modulation and coding scheme (MCS) limit indicating a maximum MCS level for the CTU access region based on the amount of resource overloading; sending the MCS limit to a plurality of user equipments (UEs) associated with the CTU access region; and adaptively allocating contention transmission units (CTUs) to the CTU access region based on loading in the CTU access region; wherein determining an amount of resource overloading includes determining an overloading factor based on a number of CTUs that are allocated to the first CTU access region and a number of active UEs. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A base station, comprising:
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a processor; and a computer readable storage medium having instructions stored thereon for execution by the processor, wherein the instructions configure the processor to; determine an amount of resource overloading for a contention transmission unit (CTU) access region associated with a grant-free uplink transmission scheme in a multiple access system; determine a modulation and coding scheme (MCS) limit indicating a maximum MCS level for the CTU access region based on the amount of resource overloading; and send the MCS limit to a plurality of user equipments (UEs) associated with the CTU access region; wherein the instructions configure to processor to determine an MCS limit by selecting a first MCS limit in response to a first overloading factor and a second MCS limit in response to a second overloading factor that is higher than the first overloading factor; wherein the first MCS limit corresponds to a first MCS level that is higher than a second MCS level corresponding to the second MCS limit. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification