Network bandwidth adjustment and indication

1 . A method comprising:

communicating with a base station via an active bandwidth part BWP) while a serving cell has a first network bandwidth;

receiving, from the base station in a system information block (SIB) message, a network bandwidth indication that indicates operation of the serving cell is to change to a second network bandwidth;

determining whether the active BWP is within the second network bandwidth;

selecting a second BWP that is within the second network bandwidth based on said determining whether the active BWP is within the second network bandwidth; and

communicating with the base station via the second BWP while the serving cell has the second network bandwidth.

2 . The method of claim 1 , further comprising:

determining the active BWP includes a first portion within the second network bandwidth and a second portion outside of the second network bandwidth; and

selecting the first portion as the second BWP based on said determining the active BWP includes the first portion within the second network bandwidth and a second portion outside of the second network bandwidth.

3 . The method of claim 1 , further comprising:

determining the active BWP is fully within the second network bandwidth; and

selecting the active BWP as the second BWP based on said determining the active BWP is fully within the second network bandwidth.

4 . The method of claim 1 , further comprising:

determining the active BWP is fully outside of the second network bandwidth; and

selecting a configured BWP that is not the active BWP as the second BWP based on said determining the active BWP is fully outside of the second network bandwidth.

5 . The method of claim 1 , wherein the network bandwidth indication comprises:

an indication of a starting location and size of the second network bandwidth;

a bitmap with a plurality of bits that respectively correspond to a plurality of resource blocks or contiguous resource block sets of the second network bandwidth; or

an indication of an index to identify the second network bandwidth from a plurality of preconfigured network bandwidths.

6 . The method of claim 1 , further comprising:

receiving an indication of a subcarrier spacing associated with the second network bandwidth.

7 . The method of claim 1 , wherein the network bandwidth indication includes an index associated with the second network bandwidth and the method further comprises:

determining the index is also associated with an identity of the second BWP; and

switching to the second BWP based on said determining that the index is also associated with the identity of the second BWP.

8 . The method of claim 1 , wherein the

second BWP is a configured BWP of a user equipment (UE).

9 . The method of claim 1 , further comprising:

receiving a dynamic resource grant within the second network bandwidth; and

performing a transmission or reception in the dynamic resource grant.

10 . The method of claim 1 , further comprising:

receiving a dynamic resource grant;

identifying an effective frequency resource that corresponds to an intersection of the dynamic resource grant and the second network bandwidth; and

performing a transmission or reception in the effective frequency resource.

11 . The method of claim 1 , further comprising:

receiving a configured resource grant;

determining or assuming the configured resource grant is fully contained within the second network bandwidth; and

performing a transmission or reception in the configured resource grant.

12 . The method of claim 1 , further comprising:

receiving a configured resource grant;

determining that the configured resource grant is at least partially outside of the second network bandwidth; and

refraining from a transmission or reception in the configured resource grant based on said determining that the configured resource grant is at least partially outside of the second network bandwidth.

13 . The method of claim 1 , further comprising:

a configured resource grant;

identifying an effective frequency resource that corresponds to an intersection of the configured resource grant and the second network bandwidth; and

performing a transmission or reception in the effective frequency resource,

wherein the configured resource grant includes a plurality of resource block sets, with each resource block set having more than one resource block and identifying the effective frequency resource includes determining a resource block set of the plurality of resource block sets is within the effective frequency resource if all resource blocks of the resource block set are within the second network bandwidth.

14 . The method of claim 1 , further comprising:

determining a duration in which the serving cell is to operate with the second network bandwidth,

wherein determining the duration comprises:

detecting an indication of the duration in the SIB message; or

receiving a configuration of a plurality of durations in the SIB message and receiving an indication of the duration selected from the plurality of durations.

15 . A method comprising:

communicating with a user equipments (UEs) via an active bandwidth part (BWP) while a serving cell has a first network bandwidth;

transmitting, to the UEs in a system information block (SIB) message, a network bandwidth indication that indicates operation of the serving cell is to change to a second network bandwidth; and

communicating with the UE via a second BWP while the serving cell has the second network bandwidth, wherein the second BWP is: the active BWP if the active BWP is fully within the second network bandwidth; a portion of the active BWP if the active BWP is partially within the second network bandwidth; or a configured BWP separate from the active BWP if the active BWP is fully outside of the second network bandwidth.

16 . The method of claim 15 , wherein the active BWP is partially within the second network bandwidth and the second BWP is a portion of the active BWP.

17 . The method of claim 15 , wherein the active BWP is fully within the second network bandwidth and the second BWP is the active BWP.

18 . The method of claim 17 , wherein the active BWP is fully outside of the second network bandwidth and the second BWP is a configured BWP separate from the active BWP.

19 . The method of claim 15 , wherein the network bandwidth indication comprises:

an indication of a starting location and size of the second network bandwidth;

a bitmap with a plurality of bits that respectively correspond to a plurality of resource blocks or contiguous resource block sets; or

an indication of an index to identify the second network bandwidth from a plurality of preconfigured network bandwidths.

20 . The method of claim 15 , further comprising:

transmitting an indication of a subcarrier spacing associated with the second network bandwidth.