Active bandwidth part configuration for evolved redcap user equipments
An apparatus and a method are disclosed for wireless communication with an external device. The apparatus may be a user equipment (UE) provided for wireless communication with an external device. The UE includes a transceiver and a processor. The processor is configured to receive, via the transceiver, a radio resource control (RRC) signal; determine a virtual bandwidth part (vBWP) based on the RRC signal, the vBWP including a plurality of narrowband (NB) bandwidth parts (BWPs) in a carrier bandwidth for the UE to perform communication at a given time instance, and determine a bandwidth location in the carrier bandwidth of at least one of the plurality of NB BWPs. If a first relative frequency of the bandwidth location in a first NB BWP is the same as a second relative frequency of a bandwidth location in a second NB BWP, then information included in downlink control information (DCI) is re-used to identify the bandwidth location.
1. A user equipment (UE) apparatus for wireless communication with an external device, the UE apparatus comprising:
a transceiver; and
a processor configured to:
receive, via the transceiver, a radio resource control (RRC) signal;
determine a virtual bandwidth part (vBWP) based on the RRC signal, the vBWP including a plurality of narrowband (NB) bandwidth parts (BWPs) in a carrier bandwidth for the UE to perform communication at a given time instance, and
determine a bandwidth location in the carrier bandwidth of at least one of the plurality of NB BWPs,
wherein if a first relative frequency of the bandwidth location in a first NB BWP is the same as a second relative frequency of a bandwidth location in a second NB BWP, then information included in downlink control information (DCI) is re-used to identify the bandwidth location.
2. The UE of claim 1 , wherein the processor is further configured to:
determine the location of at least one of the plurality of vBWPs based on a hop duration in terms of a number of slots, a gap in terms of a number of slots, or a hop offset amount along a carrier bandwidth.
3. The UE of claim 1 , wherein the processor is further configured to:
switch the UE to an active or initial BWP for paging reception, system information (SI) updates, radio link monitoring or beam failure detection.
4. The UE of claim 3 , wherein switching the UE to the active BWP further comprises:
receiving, via the transceiver, an RRC configuration message indicating the UE to switch to the active or initial BWP including, at least one of, control resource set (CORESET) 0 and the times at which switching should occur.
5. The UE of claim 3 , wherein switching the UE to the active or initial BWP further comprises:
defining a hopping pattern for the vBWP to periodically locate a BWP including control resource set (CORESET) 0.
6. The UE of claim 3 , wherein the vBWP is used for data transmission only.
7. The UE of claim 1 , wherein the processor is further configured to:
receive a block hopping sequence to communicate over resource blocks (RBs) on a set of predetermined or dynamically determined communication frequency ranges, such as the plurality of NB BWPs, in the carrier bandwidth.
8. The UE of claim 7 , wherein a communication frequency of one or more RBs is determined using a frequency domain resource allocation (FDRA) field of one or more current RBs of the vBWP.
9. The UE of claim 1 , wherein the bandwidth location of the at least one of the plurality of NB BWPs is located at an edge of the carrier bandwidth when NB UEs and wideband (WB) UEs coexist in the carrier bandwidth.
10. The UE of claim 1 , wherein the bandwidth location of the at least one of the plurality of NB BWPs is located at a predefined location in the carrier bandwidth when NB UEs and wideband (WB) UEs coexist in the carrier bandwidth.
11. A method performed by a user equipment (UE) for wireless communication with an external device, the method comprising:
receiving a radio resource control (RRC) signal;
determining a virtual bandwidth part (vBWP) based on the RRC signal, the vBWP including a plurality of narrowband (NB) bandwidth parts (BWPs) in a carrier bandwidth for the UE to perform communication at a given time instance, and
determining a bandwidth location in the carrier bandwidth of at least one of the plurality of NB BWPs,
wherein if a first relative frequency of the bandwidth location in a first NB BWP is the same as a second relative frequency in a second NB BWP, then information included in downlink control information (DCI) is re-used to identify the bandwidth location.
12. The method of claim 11 , further comprising:
determining the location of at least one of the plurality of vBWPs based on a hop duration in terms of a number of slots, a gap in terms of a number of slots, or a hop offset amount along a carrier bandwidth.
13. The method of claim 11 , further comprising:
switch the UE to an active or initial BWP for paging reception, system information (SI) updates, radio link monitoring or beam failure detection.
14. The method of claim 13 , wherein switching the UE to the active or initial BWP further comprises:
receiving, via the transceiver, an RRC configuration message indicating the UE to switch to the active or initial BWP including, at least one of, control resource set (CORESET) 0 and the times at which switching should occur.
15. The method of claim 13 , wherein switching the UE to the active or initial BWP further comprises:
defining a hopping pattern for the vBWP to periodically locate a BWP including control resource set (CORESET) 0.
16. The method of claim 13 , wherein the vBWP is used for data transmission only.
17. The method of claim 11 , further comprising:
receiving a block hopping sequence to communicate over resource blocks (RBs) on a set of predetermined or dynamically determined communication frequency ranges, such as the plurality of NB BWPs, in the carrier bandwidth.
18. The method of claim 17 , wherein a communication frequency of one or more RBs is determined using a frequency domain resource allocation (FDRA) field of one or more current RBs of the vBWP.
19. The method of claim 11 , wherein the bandwidth location of the at least one of the plurality of NB BWPs is located at an edge of the carrier bandwidth when NB UEs and wideband (WB) UEs coexist in the carrier bandwidth.
20. The method of claim 11 , wherein the bandwidth location of the at least one of the plurality of NB BWPs is located at a predefined location in the carrier bandwidth when NB UEs and wideband (WB) UEs coexist in the carrier bandwidth.