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摘要

A method of determining a search space of a carrier, a terminal and a network device are provided. The method of determining the search space of the carrier includes: in a case that cross-carrier scheduling is configured, determining, according to a search space of a scheduling carrier configured by a network device and a scaling factor, a search space of a carrier other than the scheduling carrier.

說明書

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CROSS-REFERENCE TO RELATED APPLICATION

This application is the U.S. national phase of PCT Application No. PCT/CN2019/106664 filed on Sep. 19, 2019, which claims a priority to Chinese patent application No. 201811146099.0 filed in China on Sep. 29, 2018, the disclosures of which are incorporated in their entirety by reference herein.

TECHNICAL FIELD

The present disclosure relates to the field of communications technologies, and in particular to a method of determining a search space of a carrier, a terminal and a network device.

BACKGROUND

In LTE systems, when cross-carrier scheduling is configured, a terminal determines in which cell monitoring of its Physical Downlink Control Channel (PDCCH) is performed, according to a scheduling cell I configured by higher layer signaling, and determines a resource position of a search space through a Carrier Indicator Field (CIF).

Currently, for a cross-carrier scheduling scenario, a size of a search space of a scheduled carrier needs to be the same as a size of a search space of a scheduling carrier. However, considering that numerologies (parameter sets) of different carriers are different and scheduling requirements on different carriers are different, configuring the search spaces to have the same size may limit flexibility of network configuration.

權(quán)利要求

1

What is claimed is:

1. A method of determining a search space of a carrier, applied to a terminal, comprising:in a case that cross-carrier scheduling is configured, determining, according to a search space of a scheduling carrier configured by a network device and a scaling factor, a search space of a carrier other than the scheduling carrier.

2. The method of determining the search space of the carrier according to claim 1, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers, and/or a proportional relationship between subcarrier spacings of the scheduling carrier and a scheduled carrier.

3. The method of determining the search space of the carrier according to claim 2, wherein,the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}}, ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? ? ? or ? ? ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? .

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier;

M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier;

┌ ┐ refers to rounding up, and └ ┘ refers to rounding down.

4. The method of determining the search space of the carrier according to claim 2, wherein,the scaling factor K is:

\frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}}, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?;

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier;

M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier;

SCS_scheduledis the subcarrier spacing of the scheduled carrier, and SCS_schedulingis the subcarrier spacing of the scheduling carrier;

┌ ┐ refers to rounding up, and └ ┘ refers to rounding down.

5. The method of determining the search space of the carrier according to claim 1, wherein determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the carrier other than the scheduling carrier comprises:determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, a search space of a scheduled carrier.

6. The method of determining the search space of the carrier according to claim 5, wherein the determining, according to the search space configured by the network device for the scheduling carrier and the scaling factor, the search space of the scheduled carrier comprises:determining, according to the quantity of candidate physical downlink control channels (PDCCH) comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier; and

determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier, the search space of the scheduled carrier.

7. The method of determining the search space of the carrier according to claim 6, wherein determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the scheduled carrier comprises:determining the quantity of candidate PDCCHs comprised in each aggregation level of the scheduled carrier through AL_Y,scheduled=┌AL_Y,scheduling×K┐ or AL_Y,scheduled=└AL_Y,scheduling×K┘;

wherein AL_Y,scheduledis the quantity of candidate PDCCHs comprised in each aggregation level of the scheduled carrier;

K is a scaling factor of the scheduling carrier;

┌ ┐ refers to rounding up, and └ ┘ refers to rounding down.

8. The method of determining the search space of the carrier according to claim 7, wherein,in a case that AL_Y,scheduling≠0, a minimum value of AL_Y,scheduledis 1.

9. The method of determining the search space of the carrier according to claim 1, wherein the search space of the scheduling carrier is larger than a search space of a scheduled carrier.

10. The method of determining the search space of the carrier according to claim 9, wherein a starting position of the search space of the scheduled carrier in the search space of the scheduling carrier is determined according to a value of a carrier indicator field (CIF).

11. A method of determining a search space of a carrier, applied to a network device, comprising:in a case that cross-carrier scheduling is configured for a terminal, determining, according to a search space of a scheduling carrier configured for the terminal and a scaling factor, a search space of a carrier other than the scheduling carrier.

12. The method of determining the search space of the carrier according to claim 11, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers, and/or a proportional relationship between subcarrier spacings of the scheduling carrier and a scheduled carrier.

13. The method of determining the search space of the carrier according to claim 12, wherein,the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}}, ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? ? ? or ? ? ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? .

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier;

M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier;

┌ ┐ refers to rounding up, and └ ┘ refers to rounding down; or

the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}}, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?;

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier; M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier; SCS_scheduledis the subcarrier spacing of the scheduled carrier, and SCS_schedulingis the subcarrier spacing of the scheduling carrier; ┌ ┐ refers to rounding up, and └ ┘ refers to rounding down.

14. The method of determining the search space of the carrier according to claim 11, wherein the determining, according to the search space of the scheduling carrier configured for the terminal and the scaling factor, the search space of the carrier other than the scheduling carrier comprises:determining, according to the search space of the scheduling carrier configured for the terminal and the scaling factor, a search space of a scheduled carrier;

wherein the determining according to the search space of the scheduling carrier configured for the terminal and the scaling factor, the search space of the scheduled carrier comprises:

determining, according to the quantity of candidate physical downlink control channels (PDCCH) comprised in each aggregation level of the scheduling carrier and the scaling factor, the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier; and

determining, according to the quantity of candidate PDCCHs comprised in each aggregation level of the search space of the scheduled carrier, the search space of the scheduled carrier.

15. A terminal, comprising:a processor, configured to: in a case that cross-carrier scheduling is configured, determine, according to a search space of a scheduling carrier configured by a network device and a scaling factor, a search space of a carrier other than the scheduling carrier.

16. A network device, comprising:a processor configured to perform the method according to claim 11.

17. The network device according to claim 16, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers, and/or a proportional relationship between subcarrier spacings of the scheduling carrier and a scheduled carrier.

18. The network device according to claim 17, wherein,the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}}, ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? ? ? or ? ? ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? .

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier; M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier; ┌ ┐ refers to rounding up, and └ ┘ refers to rounding down; or,

the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}}, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?;

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier; M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier; SCS_scheduledis the subcarrier spacing of the scheduled carrier, and SCS_schedulingis the subcarrier spacing of the scheduling carrier; ┌ ┐ refers to rounding up, and └ ┘ refers to rounding down.

19. The terminal according to claim 15, wherein the scaling factor is determined based on PDCCH monitoring capabilities of the terminal on different subcarriers, and/or a proportional relationship between subcarrier spacings of the scheduling carrier and a scheduled carrier.

20. The terminal according to claim 19, wherein,the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}}, ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ? ? ? or ? ? ? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} ?,

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier; M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier; ┌ ┐ refers to rounding up, and └ ┘ refers to rounding down; or,

the scaling factor K is

\frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}}, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?, or

? \frac{M_{cap, scheduled}}{M_{cap, scheduling}} \times \frac{{SCS}_{scheduled}}{{SCS}_{scheduling}} ?;

M_{cap,scheduled}is a PDCCH monitoring capability of the terminal on the scheduled carrier; M_{cap,scheduling}is a PDCCH monitoring capability of the terminal on the scheduling carrier; SCS_scheduledis the subcarrier spacing of the scheduled carrier, and SCS_schedulingis the subcarrier spacing of the scheduling carrier; ┌ ┐ refers to rounding up, and └ ┘ refers to rounding down.

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Method of determining search space of carrier, terminal and network device

摘要

說明書

權(quán)利要求

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Method of determining search space of carrier, terminal and network device

摘要

說明書

權(quán)利要求

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