Efficient bandwidth adaptation for a wideband carrier
Apparatus and methods are provided for efficient bandwidth adaptation for wideband carrier. In one novel aspect, the UE starts a BWP timer upon detecting one or more BWP timer starting triggering events, resets the BWP timer upon detecting BWP resetting triggering events, and switches to the default BWP upon expiration of the BWP timer. The BWP timer starting triggering events comprises decoding a command to switch away from the default BWP, the detection of end of DL data transmission in DRX mode. In another novel aspect, the UE only decodes the DCI indication for active BWP switching in the first three OFDM symbols of a subframe or a slot. In yet another novel aspect, when the SPS is configured for the serving cell for a UE with multiple BWPs, the SPS is configured for all the BWPs accordingly.
1. A method, comprising:
configuring a plurality of bandwidth parts (BWPs) by a user equipment (UE) in a wireless network, wherein a BWP includes a plurality of contiguous physical resource blocks (PRBs);
monitoring one or more physical downlink control channel (PDCCH) by the UE in one or more control resource set (CORESET) in an active downlink (DL) BWP;
obtaining an active BWP switching command if an indication of active BWP switching is obtained by decoding one of the one or more PDCCH in a CORESET within first three OFDM symbols of a slot; and
ignoring indication of active BWP switching command in a CORESET outside the first three OFDM symbols of a slot.
2. The method of claim 1 , wherein the active BWP switching command applies to an active DL BWP switching.
3. The method of claim 1 , wherein the active BWP switching command applies to an active uplink (UL) BWP switching.
4. The method of claim 1 , wherein the BWP switching command indicates to switch from a default BWP to an active BWP.
5. The method of claim 4 , wherein the default BWP is configured by a higher-layer signal.
6. A user equipment (UE), comprising:
a frequency (RF) transceivers that transmits and receives radio signals in a wireless network;
a memory; and
a processor coupled to the memory, the processor configured to configure a plurality of bandwidth parts (BWPs), wherein a BWP includes a plurality of contiguous physical resource blocks (PRBs); monitor one or more physical downlink control channel (PDCCH) in one or more control resource set (CORESET) in an active downlink (DL) BWP; obtains an active BWP switching command if an indication of active BWP switching is obtained by decoding one of the one or more PDCCH in a CORESET within first three OFDM symbols of a slot; and ignores indication of active BWP switching command in a CORESET outside the first three OFDM symbols of a slot.
7. The UE of claim 6 , wherein the active BWP switching command applies to an active DL BWP switching.
8. The UE of claim 6 , wherein the active BWP switching command applies to an active uplink (UL) BWP switching.
9. The UE of claim 6 , wherein the BWP switching command indicates to switch from a default BWP to an active BWP.
10. The UE of claim 9 , wherein the default BWP is configured by a higher-layer signal.