Carrier indication method, user equipment, and base station

• US 10,136,421 B2
• Filed: 08/04/2015
• Issued: 11/20/2018
• Est. Priority Date: 02/05/2013
• 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: Lyu, Yongxia, Zhang, Wen
• Primary Examiner(s): Ton, Dang
• Application Number:
  US14/817,609
• Publication Number:
  US 20150341915A1
• Time in Patent Office: 1,204 Days
• Field of Search: 370339
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• 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

This application discloses a carrier indication method, user equipment, and a base station. The method includes: receiving, by user equipment, first information sent by a base station; if the user equipment is capable of transmitting uplink data and downlink data on a carrier, determining, by the user equipment according to the first information, a carrier used for transmitting first-type information; and transmitting, by the user equipment, the first-type information on the determined carrier, where the first-type information includes at least one of the following: uplink data, downlink data, and scheduling information. In this application, user equipment determines, according to first information sent by a base station, a carrier used for transmitting information, and therefore, can normally transmit information.

Claims

1. A carrier indication method, comprising:

upon determining that a user equipment is capable of duplex communication, determining, by a base station, a carrier to be used by the user equipment to receive first-type information from the base station, wherein the first-type information comprises scheduling information;

sending, by the base station, first information to the user equipment, wherein the first information includes a subframe pattern corresponding to the determined carrier and enabling the user equipment to determine the carrier according to the subframe pattern included in the first information, the subframe pattern indicating a subset of subframes, of a radio frame on the carrier, to be used by the user equipment to receive the first-type information from the base station; and

transmitting, by the base station, the first-type information to the user equipment on the subset of the subframes on the carrier.

2. The method according to claim 1, wherein

prior to the sending, the first information is generated by the base station in accordance with a correspondence between the first information and the carrier, and

according to the correspondence:

if the first information belongs to a first predetermined set, the carrier is a first carrier;

or

if the first information belongs to a second predetermined set, the carrier is a second carrier.

3. The method according to claim 1, wherein the first information comprises one of the following:

a predetermined value and user equipment-specific information.

4. The method according to claim 3, wherein the first information comprises the user equipment-specific information, and the user equipment-specific information comprises one of the following:

a cell radio network temporary identifier C-RNTI and a temporary cell radio network temporary identifier TC-RNTI that correspond to the user equipment.

17. The method according to claim 1, wherein

the subframe pattern indicates a ratio of a number of the subset of subframes to a number of other subframes in the radio frame on the carrier, and

the method further comprises receiving, by the base station, uplink data from the user equipment on the other subframes.

5. User equipment, comprising:

a transceiver, configured to receive first information sent by a base station, the first information including a subframe pattern corresponding to a carrier used for transmitting first-type information, the subframe pattern indicating a subset of subframes, of a radio frame on the carrier, to be used to transmit the first-type information on the carrier to the base station; and

a processor, configured to;

in a case in which the user equipment is capable of transmitting uplink data and downlink data on the carrier, determine the carrier according to a correspondence between the carrier and the subframe pattern included in the first information, wherein

the transceiver is further configured to transmit the first-type information on the subset of the subframes on the determined carrier,

the first-type information comprises uplink data,

the subframe pattern indicates a ratio of a number of the subset of subframes to a number of other subframes in the radio frame on the carrier, and

the transceiver is further configured to receive, from the base station, downlink data or scheduling information on the other subframes.

6. The user equipment according to claim 5, wherein the processor is configured to determine the carrier used for transmitting the first-type information by:

determining, by the processor, whether the first information belongs to a first predetermined set or a second predetermined set; and

in a case in which it is determined that the first information belongs to the first predetermined set, determining, by the processor, to transmit the first-type information on a first carrier;

or

in a case in which it is determined that the first information belongs to the second predetermined set, determining, by the processor, to transmit the first-type information on a second carrier.

7. The user equipment according to claim 5, wherein the first information comprises one of the following:

a predetermined value and user equipment-specific information.

8. The user equipment according to claim 7, wherein the first information comprises the user equipment-specific information, and the user equipment-specific information comprises one of the following:

a cell radio network temporary identifier C-RNTI and a temporary cell radio network temporary identifier TC-RNTI that correspond to the user equipment.

9. The user equipment according to claim 5, wherein

the transceiver is configured to transmit the first-type information on the determined carrier in the following manner:

receiving, by the transceiver, downlink control information DCI on the determined carrier; and

the processor is further configured to;

after the transceiver receives the DCI on the determined carrier, determine, according to the DCI, a carrier used for transmitting second-type information, wherein the second-type information comprises;

uplink data and/or downlink data.

10. The user equipment according to claim 9, wherein the processor is configured to determine, in the following manner according to the DCI, the carrier used for transmitting the second-type information:

the DCI comprising;

first indication information used for indicating that uplink transmission or downlink transmission is to be performed, and second indication information used for indicating a carrier, and determining, by the processor according to the first indication information and the second indication information, the carrier used for transmitting the second- type information.

11. A base station, comprising:

a processor, configured to;

upon determining that a user equipment is capable of duplex communication, determine a carrier to be used by the user equipment to receive first-type information from the base station, wherein the first-type information comprises scheduling information; and

a transceiver, configured to send first information to the user equipment, wherein

the first information includes a subframe pattern corresponding to the determined carrier and enabling the user equipment to determine the carrier according to the subframe pattern included in the first information, and the subframe pattern indicates a subset of subframes, of a radio frame on the carrier, to be used by the user equipment to receive the first-type information from the base station and

the transceiver is further configured to transmit, to the user equipment, the first-type information on the subset of the subframes on the carrier.

12. The base station according to claim 11, wherein

prior to the sending, the processor generates the first information is in accordance with a correspondence between the first information and the carrier, and

according to the correspondence:

if the first information belongs to a first predetermined set, the carrier is a first carrier;

or

if the first information belongs to a second predetermined set, the carrier is a second carrier.

13. The base station according to claim 11, wherein the first information comprises one of the following:

a predetermined value and user equipment-specific information.

14. The base station according to claim 13, wherein the first information comprises the user equipment-specific information, and the user equipment-specific information comprises one of the following:

a cell radio network temporary identifier C-RNTI and a temporary cell radio network temporary identifier TC-RNTI that correspond to the user equipment.

15. The base station according to claim 11, wherein:

the transceiver is configured to transmit the first-type information on the carrier in the following manner;

sending downlink control information DCI to the user equipment on the carrier determined by the base station,

the DCI is used by the user equipment to determine, according to the DCI, a carrier used for transmitting second-type information, and

the second-type information comprises;

uplink data and/or downlink data.

16. The base station according to claim 15, wherein

the DCI comprises:

first indication information used for indicating that uplink transmission or downlink transmission is to be performed, and second indication information used for indicating a carrier.

18. The base station according to claim 11, wherein

the subframe pattern indicates a ratio of a number of the subset of subframes to a number of other subframes in the radio frame on the carrier, and

the transceiver is further configured to receive, from the user equipment, uplink data on the other subframes.