Signaling of Frequency Domain Resource Assignment

• US 20190306861A1
• Filed: 03/13/2019
• Published: 10/03/2019
• Est. Priority Date: 03/27/2018
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Li, Jingya, Baldemair, Robert, Lin, Xingqin, Lin, Zhipeng, Parkvall, Stefan, Zhang, Jianwei
• Granted Patent: US 10,455,582 B1
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Embodiments include a method for receiving, by a user equipment (UE) in a wireless communication network, an assignment of frequency-domain resources of a communication channel shared with other UEs. Such embodiments include receiving an indication of an active carrier bandwidth part (BWP) usable for communicating via the shared channel Such embodiments include selecting one or more frequency-domain resource blocks (RBs), within the active BWP, to be assigned to the UE. Such embodiments include receiving an indication of one or more assigned RBs within the active BWP, wherein the indication is encoded using a plurality of available bits that are insufficient to encode all assignable combinations of RBs within the active BWP. Such embodiments include decoding the indication to obtain the assigned RBs within the active BWP. Embodiments also include complementary methods performed by a network node, as well as network nodes and UEs configured and/or arranged to perform various methods.

Claims

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, a first indication of an active bandwidth part (BWP) usable for communicating via a shared communication channel, wherein the active BWP comprises N_BWP,1^size frequency-domain resource blocks (RBs);

receive, via a downlink control channel, a second indication of one or more assigned RBs within the active BWP, wherein;

the second indication is encoded with a plurality of bits,

the plurality of bits is related to a total number of RBs, N_BWP,2^size, within a BWP other than the active BWP, and

the plurality of bits is insufficient to encode all assignable combinations of RBs within the active BWP; and

decode the second indication to obtain the one or more assigned RBs within the active BWP.

2. The UE of claim 1, wherein the plurality of bits is less than ┌

log₂ (N_BWP^size(N_BWP^size+1)/2)┐

.

3. The UE of claim 1, wherein:

the one or more assigned RBs are represented by a starting virtual resource block, RB_start, and a length of contiguously allocated resource blocks, L_RBs;

the starting virtual resource block, RB_start, is encoded with a resolution of K_S RBs;

the length of contiguously allocated resource blocks, L_RBs, is encoded with a resolution of K_L RBs; and

K_S and K_L, are integers.

4. The UE of claim 3, wherein K_S is equal to K_L.

5. The UE of claim 3, wherein the second indication is encoded such that:

a minimum value of RB_start, that the second indication can represent is zero; and

a minimum value of L_RBs that the second indication can represent is K_L.

6. The UE of claim 3, wherein at least one of K_S and K_L is determined based on a function of (N_BWP,1^size divided by N_BWP,2^size).

7. The UE of claim 6, wherein the function is one of the following:

floor, ceiling, and round.

8. The UE of claim 6, wherein both K_S and K_L are determined to be equal to one if the function of the ratio of (N_BWP,1^size divided by N_BWP,2^size) is below a particular threshold.

9. The UE of claim 3, wherein the second indication is encoded according to:

N′

_BWP^size(L′

_RBs−

1)+RB′

_start, if (L′

_RBs−

1)≤

└

N′

_BWP^size/2┘

; and

N′

_BWP^size(N′

_BWP^size−

L′

_RBs+1)+(N′

_BWP^size−

1−

RB′

_start) otherwise,

and wherein N′

_BWP^size=N_BWP,2^size, RB′

_start=RB_start/K_S and L′

_RBs/K_L.

10. 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 RBs within the active BWP.

11. A method for receiving, by a user equipment (UE) from a network node in a wireless communication network, an assignment of frequency-domain resources of a communication channel shared with one or more further UEs, the method comprising:

receiving, from the network node, a first indication of an active bandwidth part (BWP) usable for communicating via the shared communication channel, wherein the active BWP comprises N_BWP,1^size frequency-domain resource blocks (RBs);

receiving, via a downlink control channel, a second indication of one or more assigned RBs within the active BWP, wherein;

the second indication is encoded with a plurality of bits,

the plurality of bits is related to a total number of RBs, N_BWP,2^size, within a BWP other than the active BWP, and

the plurality of bits is insufficient to encode all assignable combinations of RBs within the active BWP; and

decoding the second indication to obtain the one or more assigned RBs within the active BWP.

12. The method of claim 11, wherein:

the one or more assigned RBs are represented by a starting virtual resource block, RB_start, and a length of contiguously allocated resource blocks, L_RBs;

the starting virtual resource block, RB_start, is encoded with a resolution of K_S RBs;

the length of contiguously allocated resource blocks, L_RBs, is encoded with a resolution of K_L RBs; and

K_S and K_L are integers.

13. The method of claim 12, wherein K_S is equal to K_L.

14. The method of claim 12, wherein the second indication is encoded such that:

a minimum value of RB_start, that the second indication can represent is zero; and

a minimum value of L_RBs that the second indication can represent is K_L.

15. The method of claim 12, wherein at least one of K_S and K_L is determined based on a function of (N_BWP,1^size divided by N_BWP,2^size).

16. The method of claim 15, wherein both K_S and K_L are 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.

17. The method of claim 12, wherein the second indication is encoded according to:

N′

_BWP^size(L′

_RBs−

1)+RB′

_start, if (L′

_RBs−

1)≤

└

N′

_BWP^size/2┘

; and

N′

_BWP^size(N′

_BWP^size−

L′

_RBs+1)+(N′

_BWP^size−

1−

RB′

_start) otherwise,

and wherein N′

_BWP^size=N_BWP,2^size, RB′

_start=RB_start/K_S and L′

_RBs/K_L.

18. The method of claim 11, further comprising transmitting or receiving data, with the network node, using the one or more assigned RBs within the active BWP.

19. A network node configured to communicate with a plurality of user equipment (UEs) 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 UEs; and

processing circuitry operably coupled to the transceiver circuitry, whereby the processing circuitry and the transceiver circuitry are configured to;

send, to a particular UE, a first indication of an active bandwidth part (BWP) usable for communicating via a shared communication channel, wherein the active BWP comprises N_BWP,1^size frequency-domain resource blocks (RBs);

select one or more RBs, within the active BWP, to be assigned to the UE;

encode a second indication of the one or more selected RBs using a plurality of available bits, wherein;

the plurality of available bits is related to a total number of RBs, N_BWP,2^size, within a BWP other than the active BWP, and

the plurality of available bits is insufficient to encode all assignable combinations of RBs within the active BWP; and

send the encoded second indication to the UE via a downlink control channel.

20. The network node of claim 19, wherein:

the one or more assigned RBs are represented by a starting virtual resource block, RB_start, and a length of contiguously allocated resource blocks, L_RBs;

the starting virtual resource block, RB_start, is encoded with a resolution of K_S RBs and the length of contiguously allocated resource blocks, L_RBs, is encoded with a resolution of K_L RBs; and

K_S and K_L, are integers.

21. The network node of claim 20, wherein K_S is equal to K_L.

22. The network node of claim 20, wherein the second indication is encoded such that:

a minimum value of RB_start, that the second indication can represent is zero; and

a minimum value of L_RBs that the second indication can represent is K_L.

23. The network node of claim 20, wherein at least one of K_S and K_L is determined based on a function of (N_BWP,1^size divided by N_BWP,2^size).

24. The network node of claim 20, wherein the second indication is encoded according to:

N′

_BWP^size(L′

_RBs−

1)+RB′

_start, if (L′

_RBs−

1)≤

└

N′

_BWP^size/2┘

; and

N′

_BWP^size(N′

_BWP^size−

L′

_RBs+1)+(N′

_BWP^size−

1−

RB′

_start) otherwise,

and wherein N′

_BWP^size=N_BWP,2^size, RB′

_start=RB_start/K_S and L′

_RBs/K_L.

25. A method for assigning, to a user equipment (UE) by a network node in a wireless communication network, frequency-domain resources of a communication channel shared with one or more further UEs, the method comprising:

sending, to the UE, a first indication of an active bandwidth part, BWP, usable for communicating via the shared communication channel, wherein the active BWP comprises VA, frequency-domain resource blocks (RBs);

selecting one or more RBs, within the active BWP, to be assigned to the UE;

encoding a second indication of the one or more selected RBs using a plurality of available bits, wherein;

the plurality of available bits is related to a total number of RBs, N_BWP,2^size, within a BWP other than the active BWP, and

the plurality of available bits is insufficient to encode all assignable combinations of RBs within the active BWP; and

sending the encoded second indication to the UE via a downlink control channel.

26. The method of claim 25, wherein:

the one or more assigned RBs are represented by a starting virtual resource block, RB_start, and a length of contiguously allocated resource blocks, L_RBs;

the starting virtual resource block, RB_start, is encoded with a resolution of K_S RBs and the length of contiguously allocated resource blocks, L_RBs, is encoded with a resolution of K_L RBs; and

K_S and K_L are integers.

27. The method of claim 26, wherein K_S is equal to K_L.

28. The method of claim 26, wherein the second indication is encoded such that:

a minimum value of RB_start, that the second indication can represent is zero; and

a minimum value of L_RBs that the second indication can represent is K_L.

29. The method of claim 26, wherein at least one of K_S and K_L is determined based on a function of (N_BWP,1^size divided by N_BWP,2^size).

30. The method of claim 26, wherein the second indication is encoded according to:

N′

_BWP^size(L′

_RBs−

1)+RB′

_start, if (L′

_RBs−

1)≤

└

N′

_BWP^size/2┘

; and

N′

_BWP^size(N′

_BWP^size−

L′

_RBs+1)+(N′

_BWP^size−

1−

RB′

_start) otherwise,

and wherein N′

_BWP^size=N_BWP,2^size, RB′

_start=RB_start/K_S and L′

_RBs/K_L.