Signalling of frequency-domain resource assignment
Embodiments include methods for receiving, by a user equipment (UE) in a wireless network, assignment of frequency-domain resources of a communication channel. Such embodiments include receiving an indication of an active carrier bandwidth part (BWP) of a size N BWP,1 size frequency-domain resource blocks (RBs). Such embodiments include receiving, via a downlink control channel, an indication of assigned frequency-domain RB(s) within the active BWP, with the indication being encoded with a plurality of bits related to a size N BWP,2 size of a BWP than the active BWP, where N BWP,2 size <N BWP,1 size . Such embodiments include decoding the indication to obtain the assigned RB(s) represented by a starting virtual RB and a length of contiguously allocated RBs. The starting virtual RB is encoded with a resolution of K RBs, with K based on a ratio of N BWP,1 size and N BWP,2 size . Embodiments also include complementary methods performed by network nodes, and apparatus configured to perform these methods.
1. A user equipment (UE) configured to communicate with a network node in a wireless communication network, the UE comprising:
power supply circuitry configured to supply power to the UE;
transceiver circuitry configured to communicate with the network node; and
processing circuitry operably coupled to the transceiver circuitry, whereby the processing circuitry and the transceiver circuitry are configured to:
receive, from the network node, an indication of an active bandwidth part (BWP), wherein the active BWP is of a size N BWP,1 size in number of frequency-domain resource blocks (RBs);
receive, via a downlink control channel, an indication of one or more assigned frequency-domain RBs within the active BWP, wherein the indication of the one or more assigned frequency-domain RBs is encoded with a number of bits, the number being a plurality and being related to a size N BWP,2 size of another BWP than the active BWP, wherein the size N BWP,2 size is smaller than the size N BWP,1 size ; and
decode the indication of the one or more assigned frequency-domain RBs to obtain the one or more assigned RBs represented by a starting virtual RB, RB start , and a length of contiguously allocated RBs, L RBs , within the active BWP, wherein the starting virtual RB is encoded with a resolution of K RBs, wherein K is determined based on a ratio of the size N BWP,1 size and the size N BWP,2 size .
2. The UE of claim 1 , wherein the number of bits is equal to ┌log 2 (N BWP,2 size (N BWP,2 size +1)/2)┐.
3. The UE of claim 1 , wherein lengths of contiguously allocated resource blocks are encoded with the resolution of K RBs.
4. The UE of claim 3 , wherein the indication of the one or more assigned frequency-domain RBs is encoded such that:
a minimum value of RB start , that the indication of the one or more assigned frequency-domain RBs can represent is zero; and
a minimum value of L RBs that the indication of the one or more assigned frequency-domain RBs can represent is K.
5. The UE of claim 1 , wherein K is determined based on a floor function of (N BWP,1 size divided by N BWP,2 size ).
6. The UE of claim 1 , wherein K is determined to be equal to one if the function of (N BWP,1 size divided by N BWP,2 size ) is below a particular threshold.
7. The UE of claim 1 , wherein the combination of the processing circuitry and the transceiver circuitry is further configured to transmit or receive data, with the network node, using the one or more assigned frequency-domain RBs within the active BWP.
8. A method for receiving, by a user equipment (UE) from a network node in a wireless communication network, an assignment of frequency-domain resource blocks (RBs) of a communication channel, the method comprising:
receiving, from the network node, an indication of an active bandwidth part (BWP), wherein the active BWP is of a size N BWP,1 size in number of frequency-domain RBs;
receiving, via a downlink control channel, an indication of one or more assigned frequency-domain RBs within the active BWP, wherein the indication of the one or more assigned frequency-domain RBs is encoded with a number of bits, the number being a plurality and being related to a size N BWP,2 size of another BWP than the active BWP, wherein the size N BWP,2 size is smaller than the size N BWP,1 size ; and
decoding the indication of the one or more assigned frequency-domain RBs to obtain the one or more assigned RBs represented by a starting virtual RB, RB start , and a length of contiguously allocated RBs, L RBs , within the active BWP, wherein the starting virtual RB is encoded with a resolution of K RBs, wherein K is determined based on a ratio of the size N BWP,1 size and the size N BWP,2 size .
9. The method of claim 8 , wherein lengths of contiguously allocated resource blocks are encoded with the resolution of K RBs.
10. The method of claim 9 , wherein the indication of the one or more assigned frequency-domain RBs is encoded such that:
a minimum value of RB start , that the indication of the one or more assigned frequency-domain RBs can represent is zero; and
a minimum value of L RBS that the indication of the one or more assigned frequency-domain RBs can represent is K.
11. The method of claim 8 , wherein K is determined based on a floor function of (N BWP,1 size divided by N BWP,2 size ).
12. The method of claim 8 , wherein K is determined to be equal to one if the function of (N BWP,1 size divided by N BWP,2 size ) is below a particular threshold.
13. The method of claim 8 , further comprising transmitting or receiving data, with the network node, using the one or more assigned frequency-domain RBs within the active BWP.
14. A network node configured to communicate with a user equipment (UE) in a wireless communication network, the network node comprising:
power supply circuitry configured to supply power to the network node;
transceiver circuitry configured to communicate with the UE; and
processing circuitry operably coupled to the transceiver circuitry, whereby the processing circuitry and the transceiver circuitry are configured to:
send, to the UE, an indication of an active bandwidth part (BWP), wherein the active BWP is of a size N BWP,1 size in number of frequency-domain resource blocks (RBs);
select frequency-domain RBs, within the active BWP, to be assigned to the UE;
encode an indication of the selected frequency-domain RBs represented by a starting virtual RB, RB start , and a length of contiguously allocated RBs, L RBs using a number of bits, the number being a plurality and being related to a size N BWP,2 size of another BWP than the active BWP, wherein the size N BWP,2 size is smaller than the size N BWP,1 size , and wherein the starting virtual RB is encoded with a resolution of K RBs, wherein K is determined based on a ratio of the size N BWP,1 size and the size N BWP,2 size ; and
send the encoded indication to the UE via a downlink control channel.
15. The network node of claim 14 , wherein lengths of contiguously allocated resource blocks are encoded with the resolution of K RBs.
16. The network node of claim 15 , wherein the indication of the selected frequency-domain RBs is encoded such that:
a minimum value of RB start that the indication of the selected frequency-domain RBs can represent is zero; and
a minimum value of L RBS that the indication of the selected frequency-domain RBs can represent is K.
17. The network node of claim 14 , wherein K is determined based on a floor function of (N BWP,1 size divided by N BWP,2 size ).
18. A method for assigning, to a user equipment (UE) by a network node in a wireless communication network, frequency-domain resource blocks (RBs) of a communication channel, the method comprising:
sending, to the UE, an indication of an active bandwidth part, BWP, wherein the active BWP is of a size N BWP,1 size in number of frequency-domain RBs;
selecting frequency-domain RBs, within the active BWP, to be assigned to the UE;
encoding an indication of the selected frequency-domain RBs represented by a starting virtual RB, RB start , and a length of contiguously allocated RBs, L RBs , using a number of bits, the number being a plurality and being related to a size N BWP,2 size of another BWP than the active BWP, wherein the size N BWP,2 size is smaller than the size N BWP,1 size , and wherein the starting virtual RB is encoded with a resolution of K RBs, wherein K is determined based on a ratio of the size and the size N BWP,1 size and the size N BWP,2 size ; and
sending the encoded indication to the UE via a downlink control channel.
19. The method of claim 18 , wherein lengths of contiguously allocated resource blocks are encoded with the resolution of K RBs.
20. The method of claim 19 , wherein the indication of the selected frequency-domain RBs is encoded such that:
a minimum value of RB start , that the indication of the selected frequency-domain RBs can represent is zero; and
a minimum value of L RBs that the indication of the selected frequency-domain RBs can represent is K.
21. The method of claim 18 , wherein K is determined based on a floor function of (N BWP,1 size divided N BWP,2 size ).