Time-frequency resource allocation method and apparatus

• US 10,645,688 B2
• Filed: 10/25/2018
• Issued: 05/05/2020
• Est. Priority Date: 04/26/2016
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Luo, Hejia, Zhou, Yue, Li, Rong
• Primary Examiner(s): Roberts, Brian S
• Application Number:
  US16/170,730
• Publication Number:
  US 20190069282A1
• Time in Patent Office: 558 Days
• Field of Search: None
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0069 Allocation based on distance or geographical location allocation based on terminal or device properties in general, H04W72/51
• CPC Class Codes: H04L 5/0085 when channel conditions change
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/51 based on terminal or device properties

Abstract

Embodiments of this application provide a time-frequency resource allocation method and apparatus. The method includes: determining, by a network device, N terminal device types based on a current movement speed of a terminal device within a coverage area, where the N terminal device types are in a one-to-one correspondence with N demodulation reference signals (DMRSs) with different time domain densities; classifying, by the network device, available time-frequency resources into N time-frequency resource groups based on the N terminal device types, where a first DMRS in the N DMRSs is configured for a first time-frequency resource group in the N time-frequency resource groups; and sending, by the network device, resource indication information to the terminal device based on the N time-frequency resource groups.

Claims

1. A time-frequency resource allocation method, comprising:

determining, by a network device, N terminal device types based on a current movement speed of a terminal device within a coverage area, wherein the N terminal device types are in a one-to-one correspondence with N demodulation reference signals (DMRSs) with different time domain densities, wherein N is an integer greater than or equal to 2;

classifying, by the network device, available time-frequency resources into N time-frequency resource groups based on the N terminal device types, wherein a first DMRS in the N DMRSs is configured for a first time-frequency resource group in the N time-frequency resource groups; and

sending, by the network device, resource indication information to the terminal device based on the N time-frequency resource groups, wherein the resource indication information indicates a target time-frequency resource allocated by the network device to the terminal device or the N time-frequency resource groups.

2. The method according to claim 1, wherein the N terminal device types comprise:

a static terminal device is a terminal device having a current movement speed lower than a first threshold;

a semi-static terminal device is a terminal device having a current movement speed higher than or equal to the first threshold and lower than a second threshold;

a dynamic terminal device is a terminal device having a current movement speed higher than or equal to the second threshold; and

wherein the first threshold is less than the second threshold.

3. The method according to claim 2, wherein:

the N DMRSs comprise;

a sparse DMRS is a DMRS having a time domain density less than a third threshold,

a conventional DMRS is a DMRS having a time domain density greater than or equal to the third threshold and less than a fourth threshold,

a dense DMRS is a DMRS having a time domain density greater than or equal to the fourth threshold, and

the third threshold is less than the fourth threshold; and

the static terminal device is corresponding to the sparse DMRS, the semi-static terminal device is corresponding to the conventional DMRS, and the dynamic terminal device is corresponding to the dense DMRS.

4. The method according to claim 1, wherein:

the resource indication information is carried in grant information and indicates the target time-frequency resource allocated by the network device to the terminal device; and

before sending, by the network device, resource indication information to the terminal device based on the N time-frequency resource groups, the method further comprises;

receiving, by the network device, scheduling request information sent by the terminal device, wherein the scheduling request information carries a terminal device type of the terminal device, and

determining, by the network device, the target time-frequency resource from the N time-frequency resource groups based on the terminal device type of the terminal device.

5. The method according to claim 1, wherein:

the resource indication information indicates the N time-frequency resource groups; and

sending, by the network device, resource indication information to the terminal device based on the N time-frequency resource groups comprises;

broadcasting, by the network device, the resource indication information by using a physical broadcast channel (PBCH).

6. A time-frequency resource allocation method, comprising:

receiving, by a terminal device, resource indication information sent by a network device, wherein the resource indication information indicates a target time-frequency resource allocated by the network device to the terminal device or N time-frequency resource groups;

determining, by the terminal device, the target time-frequency resource based on the resource indication information, wherein;

the target time-frequency resource is a time-frequency resource in a target time-frequency resource group that is corresponding to N terminal device types of the terminal device and that is in the N time-frequency resource groups, and

the N time-frequency resource groups are obtained through classification by the network device based on the N terminal device types,

the N terminal device types are in a one-to-one correspondence with N demodulation reference signals (DMRSs) with different time domain densities, a first DMRS in the N DMRSs is configured for a first time-frequency resource group in the N time-frequency resource groups, and the N terminal device types are determined by the network device based on a current movement speed of the terminal device within a coverage area, and

N is an integer greater than or equal to 2; and

transmitting, by the terminal device, uplink data to the network device by using the target time-frequency resource.

7. The method according to claim 6, wherein the N terminal device types comprise:

a static terminal device is a terminal device having a current movement speed lower than a first threshold;

a semi-static terminal device is a terminal device having a current movement speed higher than or equal to the first threshold and lower than a second threshold;

a dynamic terminal device is a terminal device having a current movement speed higher than or equal to the second threshold; and

the first threshold is less than the second threshold.

8. The method according to claim 7, wherein:

the N DMRSs comprise;

a sparse DMRS is a DMRS having a time domain density less than a third threshold,

a conventional DMRS is a DMRS having a time domain density greater than or equal to the third threshold and less than a fourth threshold,

a dense DMRS is a DMRS having a time domain density greater than or equal to the fourth threshold, and

wherein the third threshold is less than the fourth threshold; and

the static terminal device is corresponding to the sparse DMRS, the semi-static terminal device is corresponding to the conventional DMRS, and the dynamic terminal device is corresponding to the dense DMRS.

9. The method according to claim 6, wherein:

before receiving, by a terminal device, resource indication information sent by a network device, the method further comprises;

receiving, by the terminal device, scheduling request information sent by the network device, wherein the scheduling request information carries the terminal device type of the terminal device; and

receiving, by a terminal device, resource indication information sent by a network device comprises;

receiving, by the terminal device, grant information sent by the network device, wherein the grant information carries the resource indication information to indicate the target time-frequency resource allocated by the network device to the terminal device.

10. The method according to claim 6, wherein:

the resource indication information indicates the N time-frequency resource groups; and

receiving, by a terminal device, resource indication information sent by a network device comprises;

obtaining, by the terminal device, the resource indication information by using a physical broadcast channel (PBCH).

11. A time-frequency resource allocation apparatus, comprising:

a receiver;

a transmitter;

a processor; and

a memory configured to store instructions which, when executed by the processor, cause the apparatus to;

determine N terminal device types based on a current movement speed of a terminal device within a coverage area, wherein the N terminal device types are in a one-to-one correspondence with N demodulation reference signals (DMRSs) with different time domain densities,

classifying available time-frequency resources into N time-frequency resource groups based on the N terminal device types, wherein a first DMRS in the N DMRSs is configured for a first time-frequency resource group in the N time-frequency resource groups,

instructing the transmitter to send, based on the N time-frequency resource groups, resource indication information to the terminal device, wherein the resource indication information indicates a target time-frequency resource allocated by the apparatus to the terminal device or the N time-frequency resource groups, and

wherein N is an integer greater than or equal to 2.

12. The apparatus according to claim 11, wherein the N terminal device types comprise:

a static terminal device is a terminal device having a current movement speed lower than a first threshold;

a semi-static terminal device is a terminal device having a current movement speed higher than or equal to the first threshold and lower than a second threshold;

a dynamic terminal device is a terminal device having a current movement speed higher than or equal to the second threshold; and

wherein the first threshold is less than the second threshold.

13. The apparatus according to claim 12, wherein:

the N DMRSs comprise;

a sparse DMRS is a DMRS having a time domain density less than a third threshold,

the conventional DMRS is a DMRS having a time domain density greater than or equal to the third threshold and less than a fourth threshold,

a dense DMRS is a DMRS having a time domain density greater than or equal to the fourth threshold, and

wherein the third threshold is less than the fourth threshold; and

the static terminal device is corresponding to the sparse DMRS, the semi-static terminal device is corresponding to the conventional DMRS, and the dynamic terminal device is corresponding to the dense DMRS.

14. The apparatus according to claim 11, wherein:

the resource indication information is carried in grant information to indicate the target time-frequency resource allocated by the apparatus to the terminal device;

the receiver is configured to;

before the apparatus sends the resource indication information to the terminal device based on the N time-frequency resource groups, receive scheduling request information sent by the terminal device, wherein the scheduling request information carries a terminal device type of the terminal device; and

the instructions, when executed by the processor, cause the apparatus to;

determine the target time-frequency resource from the N time-frequency resource groups based on the terminal device type of the terminal device.

15. The apparatus according to claim 11, wherein:

the resource indication information indicates the N time-frequency resource groups; and

the transmitter is configured to;

broadcast the resource indication information by using a physical broadcast channel (PBCH).