HYBRID DUPLEX COMMUNICATION METHOD, BS AND TERMINAL

• US 20160192355A1
• Filed: 08/05/2014
• Published: 06/30/2016
• Est. Priority Date: 08/09/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yu, Bin, Zhang, Shichang, Sun, Chengjun
• Granted Patent: US 10,327,237 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present disclosure provides a hybrid duplex communication method and apparatus. Configuration information is obtained. The configuration information includes locations of special sub-frames on the first carrier, and a transmission direction of each sub-frame on the second carrier. Sounding Reference Symbol (SRS) is sent on a special sub-frame. when all sub-frames on the second carrier are UL sub-frames, the UE may communicate with the BS on the first carrier and the second carrier according to the FDD mode; when the second carrier is used for UL and DL transmission in time division multiplexing mode, the UE may communicate with the BS on DL resources of the first carrier and UL resources of the second carrier according to the FDD mode, and/or, the UE may communicate with the BS on DL resources of the second carrier and UL resources of the second carrier according to the TDD mode.

Claims

1. A hybrid duplex communication method, comprising:

obtaining, by a terminal, configuration information, wherein the configuration information comprises configuration of a location of a special sub-frame on a first carrier and configuration of a transmission direction of each sub-frame on a second carrier, wherein other sub-frames except the special sub-frame on the first carrier are downlink sub-frames; and

sending, by the terminal, a sounding reference symbol on the special sub-frame;

when all sub-frames on the second carrier are uplink sub-frames, communicating, by the terminal, communicating with a base station (BS) on the first carrier and the second carrier according to a frequency division duplex mode.

2. The method according to claim 1, wherein the special sub-frame comprises a first time slot, a second time slot, and a third time slot, wherein the configuration information comprises configuration of a length of each time slot in the special sub-frame, wherein the method further comprises receiving a downlink channel on the first time slot, wherein the second time slot is a guard time slot, and wherein sending the sounding reference symbol on the special sub-frame comprises sending the sounding reference symbol on the third time slot.

3. The method according to claim 2, wherein the downlink channel received on the first time slot comprises at least one of a physical downlink control channel, a physical downlink data channel, a physical synchronization channel, a physical broadcasting channel, or a physical hybrid automatic retransmission request indicator channel.

4. The method according to claim 2, wherein obtaining the configuration information comprises obtaining indication information indicating a number of special sub-frames, locations of the special sub-frames, and a configuration of each time slot in the special sub-frames from a control signal received on the first carrier, obtaining indication information indicating an uplink-downlink sub-frame ratio in a frame structure of the second carrier from a control signal received on the first carrier or the second carrier, and obtaining a frequency point location and bandwidth information of the second carrier from a control signal received on the first carrier.

5. The method according to claim 4, wherein the control signal comprises a signal sent in broadcast manner or a dedicated signal sent to the terminal.

6. The method according to claim 4, wherein the indication information obtained from the control signal comprises an index;

and

wherein the method further comprises obtaining corresponding configuration information based on a look-up table according to the index.

7. The method according to claim 1, wherein the special sub-frames comprises at least one of a multicast broadcast single frequency network (MBSFN) sub-frames.

8. The method according to claim 1, wherein the second carrier is a stand-alone TDD carrier.

9. The method according to claim 1, wherein the method further comprises:

determining a timing relationship of a hybrid automatic repeat request (HARQ) or a timing relationship for scheduling according to an uplink-downlink sub-frame ratio of the first carrier and the second carrier.

10. The method according to claim 9, wherein:

when the terminal is communicating with the BS on downlink resources of the first carrier and uplink resources of the second carrier according to the FDD mode, determining a timing relationship of a hybrid automatic repeat request (HARQ) or a timing relationship for scheduling according to a number and locations of uplink sub-frames in a frame structure of the second carrier; and

when the terminal communicating with the BS on downlink resources of the second carrier and uplink resources of the second carrier according to the TDD mode, determining the timing relationship of a HARQ or the timing relationship for scheduling according to uplink-downlink sub-frame ratio and locations of sub-frames on the second carrier.

13. The method of according to claim 1, wherein,

when the second carrier is used for uplink and downlink transmission in a time division multiplexing (TDD) mode, performing, by the terminal, at least one of communication with the BS on downlink resources of the first carrier and uplink resources of the second carrier according to a frequency division duplex (FDD) mode, or communication with the BS on downlink resources of the second carrier and uplink resources of the second carrier according to the TDD mode.

11. A terminal comprising:

a configuration acquisition module, a sounding module and a communication module;

at least one processor configured to obtain configuration information, wherein the configuration information comprises a configuration of a location of a special sub-frame on a first carrier and configuration of a transmission direction of each sub-frame on a second carrier, wherein other sub-frames except special sub-frames on the first carrier are downlink sub-frames;

a transceiver configured to;

send a sounding reference signal (SRS) on the special sub-frame; and

when all sub-frames on the second carrier are uplink sub-frames, communicate with a base station (BS) on the first carrier and the second carrier.

14. The terminal according to claim 11, wherein,

when the second carrier is used for uplink and downlink transmission in a time division multiplexing (TDD) mode, the transceiver is configured to communicate with the BS on downlink resources of the first carrier and uplink resources of the second carrier according to a frequency division duplex (FDD) mode, and/or communicate with the BS on downlink resources of the second carrier and uplink resources of the second carrier according to the TDD time division duplex, TDD, mode.

18. The terminal according to claim 11, wherein the special sub-frame comprises a first time slot, a second time slot, and a third time slot, wherein the configuration information comprises configuration of a length of each time slot in the special sub-frame, wherein the method further comprises receiving a downlink channel on the first time slot, wherein the second time slot is a guard time slot, and wherein sending the sounding reference symbol on the special sub-frame comprises sending the sounding reference symbol on the third time slot.

12. A base station (BS) comprising:

a configuration module, a sounding detection module and a communication module;

at least one processor configured to generate a first configuration of a location of a special sub-frame on a first carrier and second configuration of a transmission direction of each sub-frame on a second carrier, wherein other sub-frames except special sub-frames on the first carrier are downlink sub-frames;

a transceiver configured to;

transmit configuration information comprising the first configuration and second configuration

receive a sounding reference signal (SRS) on a special sub-frame on the first carrier; and

when all sub-frames on the second carrier are uplink sub-frames, communicate with a terminal on the first carrier and the second carrier.

15. The base station according to claim 12, wherein,

when the second carrier is used for uplink and downlink transmission in a time division multiplexing (TDD) mode, the transceiver is configured to communicate with the terminal on downlink resources of the first carrier and uplink resources of the second carrier according to a frequency division multiplexing (FDD) mode, and/or communicate with the terminal on downlink resources of the second carrier and uplink resources of the second carrier according to the TDD time division duplex, TDD, mode.

19. The BS according to claim 12, wherein the special sub-frame comprises a first time slot, a second time slot, and a third time slot, wherein the configuration information comprises configuration of a length of each time slot in the special sub-frame, wherein the method further comprises receiving a downlink channel on the first time slot, wherein the second time slot is a guard time slot, and wherein sending the sounding reference symbol on the special sub-frame comprises sending the sounding reference symbol on the third time slot.

16. A hybrid duplex communication method, comprising:

generating, by a base station (BS), first configuration of a location of a special sub-frame on a first carrier and second configuration of a transmission direction of each sub-frame on a second carrier, wherein other sub-frames except special sub-frames on the first carrier are downlink sub-frames;

transmitting, by the BS, configuration information comprising the first configuration and second configuration;

receiving, by the BS from a terminal, a sounding reference signal (SRS) on a special sub-frame on the first carrier; and

when all sub-frames on the second carrier are uplink sub-frames, communicate with a terminal on the first carrier and the second carrier.

17. The method according to claim 16, further comprising:

when the second carrier is used for uplink and downlink transmission in a time division multiplexing (TDD) mode, communicating with the terminal on downlink resources of the first carrier and uplink resources of the second carrier according to a frequency division multiplexing (FDD) mode, or communicating with the terminal on downlink resources of the second carrier and uplink resources of the second carrier according to the TDD mode.