Selecting a bandwidth part (BWP)
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorMin Wang
Life of this patent
Estimating the term…
Abstract
The random access (RA) procedure in NR-U can be improved by enable the NR-U capable UE to choose a suitable BWP and uses this chosen BWP to perform the RA procedure. A suitable BWP is a BWP with a low probability for LBT failure, such as a BWP having a load that is less than a threshold load. For example, whenever the UE has a RA procedure triggered, the UE selects the most suitable BWP based on load information, such as load measurements made by the UE for one or more available BWPs or load information communicated to the UE. The selected BWP for the RA procedure may be different from the UE's currently active BWP, and, in this case, the UE may do a BWP switch before the RA procedure.
Claims22
A method performed by a user equipment (UE), the method comprising:
- the UE receiving a message transmitted by a network node, the message comprising bandwidth part (BWP) information comprising a first BWP load indicator for a first BWP, the first BWP load indicator indicating a load status of the first BWP, the first BWP being a first subset of contiguous common resource blocks, the BWP information further comprising a second BWP load indicator for a second BWP, the second BWP load indicator indicating a load status of the second BWP, the second BWP being a second subset of contiguous common resource blocks, and the second subset does not overlap with the first subset;
- the UE obtaining the BWP information from the message;
- the UE selecting a BWP from a set of BWPs comprising the first BWP and the second BWP based on the obtained BWP information;
- and
- the BWP information further comprising a bit map comprising a set of N bits in which:
- N is greater than 1;
- each of the N bits corresponds to a different BWP of the contiguous common resource blocks, and
- for each bit included in the set of N bits, the value of the bit indicates whether or not the message includes a BWP load indicator for the BWP to which the bit corresponds.
A method performed by a network node, the method comprising:
- the network node transmitting a message comprising bandwidth part (BWP) information comprising a first BWP load indicator for a first BWP and a second BWP load indicator for a second BWP, the first BWP being a first subset of contiguous common resource blocks, the second BWP being a second subset of contiguous common resource blocks, the second subset does not overlap with the first subset, the first BWP load indicator indicating a load status of the first BWP, and the second BWP load indicator indicating a load status of the second BWP, the BWP information further comprising a bit map comprising a set of N bits in which:
- N is greater than 1,
- each of the N bits corresponds to a different BWP of the set of contiguous common resource blocks, and
- for each bit included in the set of N bits, the value of the bit indicates whether or not the message includes a BWP load indicator for the BWP to which the bit corresponds, the network node receiving from a user equipment (UE) information identifying a BWP selected by the UE based on the BWP information transmitted by the network node;
- and
- after receiving the information, the network node transmitting a response message to the UE, the response message containing information indicating whether or not the UE should switch from a currently active BWP to the selected BWP such that the selected BWP becomes the UE's new active BWP.
Dependencies are inferred from the claim text.