Signaling indication for flexible new radio (NR) long term evolution (LTE) coexistence

Patent metadata

Field	Value
Publication number	US-10925046-B2
Application number	US-201815860334-A
Country	US
Kind code	B2
Filing date	Jan 2, 2018
Priority date	Jan 5, 2017
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A New Radio (NR) control signal that indicates one or more Long Term Evolution (LTE) network parameters may be transmitted to NR UEs to enable the NR UEs to identify which resources carry LTE signal(s). The NR UEs may then receive one or more NR downlink signals over remaining resources in a set of resources without processing those resources that carry LTE signal(s). The NR downlink signals may have a zero power level, or otherwise be blanked, over resources that carry the LTE signal(s).

First claim

What is claimed is:

1. A method comprising:
receiving, by a User Equipment (UE), a New Radio (NR) control signal indicating a Long Term Evolution (LTE) network parameter;
identifying, within a set of resources, a subset of resources carrying LTE signal(s) based on the LTE network parameter; and
receiving, by the UE, an NR downlink signal over one or more resources, excluding the subset of resources, in the set of resources.

2. The method of claim 1 , wherein the set of resources includes at least some resources that are allocated to the UE.

3. The method of claim 1 , wherein the set of resources includes at least some control resource sets configured to the UE.

4. The method of claim 1 , wherein the NR downlink signal is rate matched around the subset of resources carrying the LTE signal(s), and wherein the NR downlink signal is rate matched at the resource element (RE) level such that the subset of resources around which the NR downlink signal is rate matched consists of an integer number of resource elements (REs).

5. The method of claim 1 , wherein the NR control signal indicates an LTE antenna port, wherein determining the subset of resources carrying LTE signal(s) comprises determining that the subset of resources includes resources carrying LTE reference signal(s) based on an LTE cell-specific reference signal (CRS) pattern associated with the LTE antenna port.

6. The method of claim 1 , wherein the NR control signal indicates a frequency offset, wherein determining the subset of resources carrying LTE signal(s) comprises determining that the subset of resources includes resources carrying LTE reference signal(s) based on the frequency offset.

7. The method of claim 1 , wherein the NR control signal indicates a number of Orthogonal Frequency Division Multiplexed (OFDM) symbols in an LTE control channel, wherein receiving the NR downlink signal over the one or more resources in the subset of resources comprises adjusting the start time for receiving an NR downlink signal for a period of time corresponding to the number of OFDM symbols in the LTE control channel.

8. The method of claim 1 , wherein the NR control signal indicates an LTE Multicast-Broadcast Single-Frequency Network (MBSFN) configuration, wherein determining the subset of resources carrying LTE signal(s) comprises determining that the subset of resources includes resources carrying LTE MBSFN reference signal(s) based on the LTE MBSFN configuration.

9. The method of claim 1 , wherein the NR control signal indicates an LTE Channel State Information Reference Signal (CSI-RS) configuration, and wherein determining the subset of resources carrying LTE signal(s) comprises determining that the subset of resources includes resources carrying LTE CSI-RS signal(s) based on the LTE CSI-RS configuration.

10. The method of claim 1 , wherein receiving the NR downlink signal comprises:
receiving one or more NR downlink signal(s) over the one or more resources, the one or more NR downlink signals having zero power levels over the subset of resources carrying the LTE signal(s), wherein the one or more NR downlink signals include an NR signal transmitted over a Physical Downlink Shared Channel (PDSCH), an NR control signal transmitted over a Physical Downlink Control Channel (PDCCH), an NR primary or secondary synchronization signal, an NR broadcast signal transmitted over an NR Physical Broadcast Channel (PBCH), or a combination thereof.

11. A method comprising:
receiving, by a User Equipment (UE), a New Radio (NR) control signal indicating a Long Term Evolution (LTE) network parameter;
identifying, within a set of resources, a subset of resources carrying, or otherwise reserved for, LTE signal(s) based on the LTE network parameter; and
transmitting, by the UE, an NR uplink signal over one or more resources, excluding the subset of resources, in the set of resources.

12. The method of claim 1 , wherein the set of resources includes at least some resources that are allocated to the UE.

13. The method of claim 1 , wherein the set of resources includes at least some resources configured for uplink control signals.

14. The method of claim 1 , wherein the NR uplink signal is rate matched around the subset of resources carrying, or otherwise reserved for, the LTE signal.

15. The method of claim 1 , wherein determining the subset of resources carrying LTE signal(s) comprises:
determining that at least some resources in the subset of resources are reserved for LTE Random Access Channel (RACH) transmissions based on the LTE network parameter in the NR control signal.

16. The method of claim 1 , wherein determining the subset of resources carrying LTE signal(s) comprises:
determining that at least some resources in the subset of resources carry LTE sounding reference signal (SRS) symbols based on the LTE network parameter in the NR control signal.

17. The method of claim 1 , wherein determining the subset of resources carrying LTE signal(s) comprises:
determining that at least some resources in the subset of resources carry LTE data signal transmitted over an NR physical uplink channel (PUSCH) or an NR control signal transmitted over an NR physical uplink control channel (PUCCH) based on the LTE network parameter in the NR control signal.

18. A User Equipment (UE) comprising:
a processor; and
a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
receive a New Radio (NR) control signal indicating a Long Term Evolution (LTE) network parameter;
identify, within a set of resources, a subset of resources carrying, or otherwise reserved for, LTE signal(s) based on the LTE network parameter; and
transmit an NR uplink signal over one or more resources, excluding the subset of resources, in the set of resources.

19. The UE of claim 18 , wherein the set of resources includes at least some resources that are allocated to the UE.

20. The UE of claim 18 , wherein the set of resources includes at least some resources configured for uplink control signals.

21. The UE of claim 18 , wherein the NR uplink signal is rate matched around the subset of resources carrying, or otherwise reserved for, the LTE signal.

22. The UE of claim 18 , wherein the instructions to determine the subset of resources carrying LTE signal(s) include instructions to:
determine that at least some resources in the subset of resources are reserved for LTE Random Access Channel (RACH) transmissions based on the LTE network parameter in the NR control signal.

23. The UE of claim 18 , wherein the instructions to determine the subset of resources carrying LTE signal(s) include instructions to:
determine that at least some resources in the subset of resources carry LTE sounding reference signal (SRS) symbols based on the LTE network parameter in the NR control signal.

24. The UE of claim 18 , wherein the instructions to determine the subset of resources carrying LTE signal(s) include instructions to:
determine that at least some resources in the subset of resources carry LTE data signal transmitted over an NR physical uplink channel (PUSCH) or an NR control signal transmitted over an NR physical uplink control channel (PUCCH) based on the LTE network parameter in the NR control signal.

25. A User Equipment (UE) comprising:
a processor; and
a non-transitory computer readable storage medium storing programming for ex

Assignees

• Huawei Tech Co Ltd

Inventors

• Maaref Amine
• Au Kelvin Kar Kin
• Ma Jianglei

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/1268

  of uplink data flows · CPC title

• H04W72/0457

  Variable allocation of band or rate · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title