FULL DUPLEX COMMUNICATION METHOD AND ASSOCIATED RADIO BASE STATION

• US 20160234003A1
• Filed: 09/18/2013
• Published: 08/11/2016
• Est. Priority Date: 09/18/2013
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Wang, Yunfei, Yan, Jie, Wei, Min
• Granted Patent: US 10,237,047 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02

Abstract

The present disclosure provides a full duplex communication method implemented by a Radio Base Station (RBS) supporting Time Division Duplex (TDD) scheme and the associated RBS. The method comprises configuring a first logic cell and a second logic cell for the RBS by specifying a first downlink/uplink (DL/UL) configuration corresponding to the first logic cell and a second, different DL/UL configuration corresponding to the second logic cell. The method also comprises transmitting a first wireless signal to a first UE associated with one of the first and the second logic cells and receiving a second wireless signal from a second UE associated with the other of the first and the second logic cells simultaneously in a subframe, which is allocated for DL communication according to one of the first and the second DL/UL configurations corresponding to the one of the first and the second logic cells and is allocated for UL communication according to the other of the first and the second DL/UL configurations corresponding to the other of the first and the second logic cells. Self-interference suppression is performed to suppress interference from the transmission of the first wireless signal to the reception of the second wireless signal.

Claims

1. A full duplex communication method implemented by a Radio Base Station (RBS) supporting Time Division Duplex (TDD) scheme, the method comprising:

configuring a first logic cell and a second logic cell for the RBS by specifying a first downlink/uplink (DL/UL) configuration corresponding to the first logic cell and a second, different DL/UL configuration corresponding to the second logic cell,

transmitting a first wireless signal to a first User Equipment (UE) associated with one of the first and the second logic cells and receiving a second wireless signal from a second UE associated with the other of the first and the second logic cells simultaneously in a subframe, which is allocated for DL communication according to one of the first and the second DL/UL configurations corresponding to the one of the first and the second logic cells and is allocated for UL communication according to the other of the first and the second DL/UL configurations corresponding to the other of the first and the second logic cells, and

performing self-interference suppression to suppress interference from the transmission of the first wireless signal to the reception of the second wireless signal.

2. The method of claim 1, further comprising:

selecting, from UEs served by the RBS, the first UE and the second UE to ensure that interference at the first UE caused by transmission from the second UE is less than a predetermined level.

3. The method of claim 1, further comprising:

performing Inter-Cell Interference Coordination (ICIC) to suppress inter-cell interference between the first and the second logic cells in a subframe, which is allocated for DL communication or UL communication according to both of the first and the second DL/UL configurations.

4. The method of claim 3, wherein said performing ICIC comprises:

configuring the subframe, which is allocated for DL communication or UL communication according to both of the first and the second DL/UL configurations, as an Almost Blank Subframe (ABS) for one of the first and second logic cells, and

muting DL or UL traffic data transmission in the ABS.

5. The method of claim 3, wherein the first and the second logic cells use two separate main carriers, and said performing ICIC comprises:

transmitting at least part of control information for the first and the second logic cells on said two separate main carriers, respectively, and

performing cross-carrier scheduling (CCS) to schedule traffic data transmission for the first and the second logic cells.

6. The method of claim 1, wherein the first and the second logic cells have different cell identifications (Cell IDs).

7. The method of claim 1, wherein DL signals for the first and the second logic cells are combined and then transmitted by the RBS via a same set of one or more antennas, and UL signals for the first and the second logic cells are received by the RBS via a same set of one or more antennas.

8. A Radio Base Station, RBS, comprising:

a logic cell configuration unit arranged to configure a first logic cell and a second logic cell for the RBS by specifying a first downlink/uplink (DL/UL) configuration corresponding to the first logic cell and a second, different DL/UL configuration corresponding to the second logic cell,

a transceiver arranged to transmit a first wireless signal to a first User Equipment (UE) associated with one of the first and the second logic cells and receive a second wireless signal from a second UE associated with the other of the first and the second logic cells simultaneously in a subframe, which is allocated for DL communication according to one of the first and the second DL/UL configurations corresponding to the one of the first and the second logic cells and is allocated for UL communication according to the other of the first and the second DL/UL configurations corresponding to the other of the first and the second logic cells, and

a self-interference suppression unit arranged to suppress interference from the transmission of the first wireless signal to the reception of the second wireless signal.

9. The RBS of claim 8, further comprising a UE selection unit arranged to select, from UEs served by the RBS, the first UE and the second UE to ensure that interference at the first UE caused by transmission from the second UE is less than a predetermined level.

10. The RBS of claim 8, further comprising an Inter-Cell Interference Coordination (ICIC) unit arranged to suppress inter-cell interference between the first and the second logic cells in a subframe, which is allocated for DL communication or UL communication according to both of the first and the second DL/UL configurations.

11. The RBS of claim 10, wherein said ICIC unit is further arranged to

configure the subframe, which is allocated for DL communication or UL communication according to both of the first and the second DL/UL configurations, as an Almost Blank Subframe (ABS) for one of the first and second two logic cells, and

mute DL or UL traffic data transmission in the ABS.

12. The RBS of claim 10, wherein the first and the second logic cells use two separate main carriers, and said ICIC unit is further arranged to

transmit at least part of control information for the first and the second logic cells on said two separate main carriers, respectively, and

perform cross-carrier scheduling (CCS) to schedule traffic data transmission for the first and the second logic cells.

13. The RBS of claim 8, wherein the first and the second logic cells have different cell identifications (Cell_IDs).

14. The RBS of claim 8, further comprising a DL signal combiner arranged to combine DL signals for the first and the second logic cells, and wherein the transceiver is arranged to transmit the combined DL signals via a same set of one or more antennas and to receive UL signals for the first and the second two logic cells via a same set of one or more antennas.