CROSS-REFERENCE TO RELATED APPLICATION

The present application is the U.S. national phase of PCT Application No. PCT/CN2018/105523 filed on Sep. 13, 2018, which claims a priority of the Chinese patent application 201711071955.6 filed on Nov. 3, 2017, which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to the field of communication technology, in particular to a signal interference avoidance method and a network device.

BACKGROUND

Currently, a Long Term Evolution (LTE) system and a 5th-Generation (5G) New Radio (NR) system need to be tightly coupled to each other in a Dual Connectivity (DC) mode, as shown inFIG. 1. One system serves as a Master Node (MN), and the other system serves as a Secondary Node (SN). In the DC system, two cell groups are provided, i.e., a Master Cell Group (MCG) and a Secondary Cell Group (SCG). The MCG may include one Primary Cell (PCell) and one or more Secondary Cells (SCells). The SCG may include one Primary Secondary Cell (PSCell) and one or more SCells.

In terms of spectrum, an LTE Frequency Division Duplexing (FDD) spectrum of 1.8 GHz and an NR Time Division Duplexing (TDD) spectrum of 3.5 GHz may be adopted for the dual connectivity of the LTE system and the NR system. As shown inFIG. 2, when an uplink signal at a frequency of 1.8 GHz is transmitted by a User Equipment (UE), a downlink reception signal at a frequency of 3.5 GHz for the UE may be adversely affected by a second harmonic interference generated by the uplink signal at a frequency of 1.8 GHz, thereby such a phenomenon as self-interference may occur for the UE.

In addition, in a non-DC system consisting of, e.g., the 5G NR system of 1.8 GHz and a carrier aggregation system of 3.5 GHz, the downlink reception signal at a frequency of 3.5 GHz for the UE may be adversely affected by the secondary harmonic interference generated by the uplink signal at a frequency of 1.8 GHz, and such a phenomenon as self-interference may also occur for the UE. In an NR Supplemental Uplink (SUL) system where an SUL carrier is at a frequency of 1.8 GHz and an NR carrier is at a frequency of 3.5 GHz, the downlink reception signal at a frequency of 3.5 GHz for the UE may be adversely affected by the secondary harmonic interference generated by the uplink signal at a frequency of 1.8 GHz, and at this time the self-interference may also occur for the UE.

SUMMARY

An object of the present disclosure is to provide a signal interference avoidance method and a network device, so as to prevent the occurrence of the self-interference for the UE.

In one aspect, the present disclosure provides in some embodiments a signal interference avoidance method for a first network device, including, when a self-interference occurs for a UE connected concurrently to the first network device and a second network device, transmitting first interference avoidance indication information to the second network device, wherein the first interference avoidance indication information is used to enable the second network device to communicate with the UE through a first time-domain resource and/or a first frequency-domain resource. The first interference avoidance indication information includes identification information about the UE.

In another aspect, the present disclosure provides in some embodiments a signal interference avoidance method for a second network device, including: receiving first interference avoidance indication information from a first network device, the first interference avoidance indication information being transmitted when the first network device detects that a self-interference occurs for a UE connected concurrently to the first network device and the second network device; and communicating with the UE through a first time-domain resource and/or a first frequency-domain resource in accordance with the first interference avoidance indication information. The first interference avoidance indication information includes identification information about the UE.

In yet another aspect, the present disclosure provides in some embodiments a network device, including a first transmission module configured to, when a self-interference occurs for a UE connected concurrently to the first network device and a second network device, transmit first interference avoidance indication information to the second network device, wherein the first interference avoidance indication information is used to enable the second network device to communicate with the UE through a first time-domain resource and/or a first frequency-domain resource. The first interference avoidance indication information includes identification information about the UE.

In still yet another aspect, the present disclosure provides in some embodiments a network device, including: a first reception module configured to receive first interference avoidance indication information from a first network device, the first interference avoidance indication information being transmitted by the first network device when a self-interference occurs for a UE connected concurrently to the first network device and the second network device; and a first communication module configured to communicate with the UE through a first time-domain resource and/or a first frequency-domain resource in accordance with the first interference avoidance indication information. The first interference avoidance indication information includes identification information about the UE.

In still yet another aspect, the present disclosure provides in some embodiments a network device, including a processor, a memory, and a computer program stored in the memory and executed by the processor. The processor is configured to execute the computer program so as to implement the above-mentioned signal interference avoidance method.

In still yet another aspect, the present disclosure provides in some embodiments a computer-readable storage medium storing therein a computer program. The computer program is executed by a processor so as to implement the above-mentioned signal interference avoidance method.

According to the embodiments of the present disclosure, when the self-interference occurs for the UE connected concurrently to the first network device and the second network device, the first network device may transmit the first interference avoidance indication information to the second network device, wherein the first interference avoidance indication information is used to enable the second network device to communicate with the UE through the first time-domain resource and/or the first frequency-domain resource. As a result, it is able to effectively prevent the occurrence of the self-interference for the UE, thereby to improve the signal transmission quality.

