Methods and systems for resource configuration of grant-free (GF)transmissions using radio resource control (RRC) signal
Methods and systems for dynamically activate and deactivate an allocated resource for a UE to make grant-free uplink transmission are provided. In one embodiment, a user equipment (UE) receives a Radio Resource Control (RRC) signal. The RRC signal specifies grant-free (GF) configuration information. The GF configuration information comprises an activation field and at least one other GF resource configuration field. The activation field indicates whether the UE may perform GF uplink (UL) transmissions without waiting for a downlink control information (DCI) message. Then, the UE performs a GF UL transmission in accordance with the GF configuration information in the RRC signal.
1. A method, the method comprising:
transmitting, by a base station to a user equipment (UE), a Radio Resource Control (RRC) signal specifying grant-free (GF) configuration information, the GF configuration information in the RRC signal comprising an activation field and at least one other GF resource configuration field, wherein the activation field in the RRC signal indicates that the UE needs to wait a downlink control information (DCI) message before performing GF uplink (UL) transmissions;
transmitting, by the base station to the UE, the DCI message, the DCI message comprising additional GF configuration information; and
receiving, by the base station from the UE, a GF UL transmission in accordance with the GF configuration information in the RRC signal and the additional GF configuration information in the DCI message.
2. The method of claim 1 , wherein the activation field is shared with at least a subset of the at least one other GF resource configuration field.
3. The method of claim 1 , wherein the activation field is a bit field in addition to the at least one other GF resource configuration field.
4. The method of claim 1 , further comprising:
transmitting, by the base station to the UE, a second RRC signal specifying second GF configuration information, the second GF configuration information in the second RRC signal comprising a second activation field and second at least one other GF resource configuration field, wherein the second activation field indicates that the UE does not need to wait a second DCI message before performing second GF UL transmissions; and
receiving, by the base station from the UE, a second GF UL transmission using GF UL resources associated with the second at least one other GF resource configuration field in the second RRC signal without transmitting the second DCI message to the UE.
5. The method of claim 1 , the GF configuration information in the RRC signal comprises at least one of frequency domain resources, time domain resources, at least one reference signal (RS) associated with the time domain resources and frequency domain resources, a modulation and coding scheme (MCS) field, power control fields, a hopping pattern, or a repetition number.
6. A user equipment (UE), comprising:
at least one processor; and
a computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions to:
receive, from a base station, a Radio Resource Control (RRC) signal specifying grant-free (GF) configuration information, the GF configuration information in the RRC signal comprising an activation field and at least one other GF resource configuration field, wherein the activation field in the RRC signal indicates that the UE needs to wait a downlink control information (DCI) message before performing GF uplink (UL) transmissions;
receive, from the base station, the DCI message, the DCI message comprising additional GF configuration information; and
transmit, to the base station, a GF UL transmission in accordance with the GF configuration information in the RRC signal and the additional GF configuration information in the DCI message.
7. The UE of claim 6 , wherein the activation field is shared with at least a subset of the at least one other GF resource configuration field.
8. The UE of claim 6 , wherein the activation field is a bit field in addition to the at least one other GF resource configuration field.
9. The UE of claim 6 , the programming further including instructions to:
receive, from the base station, a second RRC signal specifying second GF configuration information, the second GF configuration information in the second RRC signal comprising a second activation field and second at least one other GF resource configuration field, wherein the second activation field indicates that the UE does not need to wait a second DCI message before performing second GF UL transmissions; and
transmit, to the base station, a second GF UL transmission using GF UL resources associated with the second at least one other GF resource configuration field in the second RRC signal without waiting for the second DCI message.
10. The UE of claim 6 , the GF configuration information in the RRC signal comprises at least one of frequency domain resources, time domain resources, at least one reference signal (RS) associated with the time domain resources and frequency domain resources, a modulation and coding scheme (MCS) field, power control fields, a hopping pattern, or a repetition number.
11. A base station (BS), comprising:
at least one processor; and
a computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions to:
transmit, to a user equipment (UE), a Radio Resource Control (RRC) signal specifying grant-free (GF) configuration information, the GF configuration information in the RRC signal comprising an activation field and at least one other GF resource configuration field, wherein the activation field in the RRC signal indicates that the UE needs to wait a downlink control information (DCI) message before performing GF uplink (UL) transmissions;
transmit, to the UE, the DCI message, the DCI message comprising additional GF configuration information; and
receive, from the UE, a GF UL transmission in accordance with the GF configuration information in the RRC signal and the additional GF configuration information in the DCI message.
12. The BS of claim 11 , wherein the activation field is shared with at least a subset of the at least one other GF resource configuration field.
13. The BS of claim 11 , wherein the activation field is a bit field in addition to the at least one other GF resource configuration field.
14. The BS of claim 11 , the programming further including instructions to:
transmit, to the UE, a second RRC signal specifying second GF configuration information, the second GF configuration information in the second RRC signal comprising a second activation field and second at least one other GF resource configuration field, wherein the second activation field indicates that the UE does not need to wait a second DCI message before performing second GF UL transmissions; and
receive, from the UE, a second GF UL transmission using GF UL resources associated with the second at least one other GF resource configuration field in the second RRC signal without transmitting the second DCI message to the UE.
15. The BS of claim 11 , the GF configuration information in the RRC signal comprises at least one of frequency domain resources, time domain resources, at least one reference signal (RS) associated with the time domain resources and frequency domain resources, a modulation and coding scheme (MCS) field, power control fields, a hopping pattern, or a repetition number.