CN111819810A

CN111819810A - Method and device for processing direct current carrier

Info

Publication number: CN111819810A
Application number: CN201980013852.5A
Authority: CN
Inventors: 黎超; 张福强; 李溪野
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2020-10-23
Anticipated expiration: 2039-01-28
Also published as: WO2020154863A1; CN111819810B

Abstract

The embodiment of the application discloses a method and a device for processing a direct current carrier, relates to the technical field of communication, and can solve the problems of scheduling limitation or transmission performance reduction caused by mismatching of a DC carrier of a signal transmitted by a base station and a DC carrier of a signal received by UE (user equipment) because the DC carrier of the signal transmitted by the base station is different from the DC carrier of the signal received by the UE and the base station does not know the position of the DC carrier of the signal received by the UE. The method comprises the following steps: the first device receiving a first signal from a second device; the first device determines whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device receives the first signal; if yes, the first device sets a bit value of a resource RE corresponding to a subcarrier overlapped with the DC carrier in a resource occupied by the second signal to be received to be 0. The embodiment of the application is used for transmitting signals in an NR system.

Description

Method and device for processing direct current carrier

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for processing a dc carrier.

Background

In the standardization of the fifth Generation (5-Generation, 5G) mobile communication technology in progress by the third Generation Partnership Project (3 GPP), a concept of a BandWidth Part (BWP) is defined. For the transmitter of the base station, the BWP transmission-based data may be transmitted simultaneously to a plurality of different UEs. I.e. the signal transmitted by the base station occupies a larger bandwidth, and for the receiver of the User Equipment (UE), the communication is performed based on the configured BWP. Therefore, the bandwidth of the UE receiving signals is typically smaller than the bandwidth of the base station transmitting signals, thereby reducing cost and power consumption for UE reception. Since the bandwidth of the UE receiving the signal is different from the bandwidth of the base station transmitting the signal, there is a potential problem that: the Direct Current (DC) carrier of the signal transmitted by the base station is different from the DC carrier of the signal received by the UE, and the base station does not know the location of the DC carrier of the signal received by the UE. A mismatch between the two may result in scheduling limitations or a reduction in transmission performance.

Disclosure of Invention

The application provides a method and a device for processing a direct current carrier, which can solve the problems of scheduling limitation or reduction of transmission performance caused by mismatching of a DC carrier of a signal transmitted by a base station and a DC carrier of a signal received by UE (user equipment) and the base station which does not know the position of the DC carrier of the signal received by the UE.

In a first aspect, a method for processing a dc carrier is provided, where the method includes: the first device receiving a first signal from a second device; the first device determines whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device receives the first signal; if yes, the first device sets a bit value of a resource RE corresponding to a subcarrier overlapped with the DC carrier in a resource occupied by the second signal to be received to be 0. The signal is transmitted over the new air interface NR. That is, when the first device receives the second signal and there is a signal transmission on the DC carrier, the signal on the DC carrier may be discarded, and the discarding may be understood as a puncturing or zero padding operation, so that if the DC carrier is scheduled on a resource of data that is susceptible to influence, if the bit value of the resource RE corresponding to the subcarrier that overlaps with the DC carrier in the resource occupied by the second signal to be received is set to 0, the receiver of the first device may be less influenced by the resource, influence on data reception by the first device may be reduced as much as possible, and transmission performance may be improved. The zero padding operation is performed because for the NR receiver, since the second device does not know the location of the DC carrier received by the first device in the downlink, and the number of resource REs obtained by the receiver of the first device after discarding the signal on this subcarrier is reduced, the first device can zero-pad the signal on this RE overlapped by the DC carrier when the receiver discards the signal on the RE, and then obtain the data of all REs according to the zero-padding, so that the data received by the receiver of the first device is not affected.

In one possible design, the method further includes: the first device transmits, to the second device, location information of a DC carrier on which the first device receives the first signal. In the NR, the first device sends, to the second device, location information of a DC carrier that receives the first signal, so that when the first device receives configuration information of a reception resource configured by the second device, if the first device determines that the location information of the DC carrier overlaps with the location information of the DC carrier in the configuration information, the first device performs a zero padding operation on a subcarrier that overlaps with the DC carrier, which can reduce the collision between the location of the DC carrier of the first device or the second device and a frequency domain location occupied by information of a configured critical transmission resource, thereby reducing the influence on the reception performance of a receiver of the first device.

In a possible design, if the first device determines that the resource occupied by the first signal overlaps with a direct current DC carrier set when the first device receives the first signal, before the first device sets a bit value of a resource RE corresponding to a subcarrier overlapping with the DC carrier in the resource occupied by the second signal to be received to 0, the method further includes: and the first equipment determines whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received as 0 or not according to the resource occupied by the first signal. That is, before determining to perform the zero padding operation, it is further required to further determine whether the zero padding operation needs to be performed according to the resource occupied by the first signal, so that once the RE of the vulnerable data is scheduled on the DC carrier, it is determined that the zero padding operation needs to be performed on the DC carrier, and the processing complexity of the first device can be reduced.

In one possible design, the resource occupied by the first signal includes at least one of: the method comprises the steps of configuring parameters of reference signals, scheduling parameters of transmission data and signal characteristics on resources where DC carriers are located; the resources occupied by the reference signal comprise a DC carrier, and the resources occupied by the transmission data comprise the DC carrier. These resources include vulnerable data and once one of these resources is transmitted on the DC carrier, the DC carrier needs to be dropped, improving the first device receiver performance.

In one possible design, the configuration parameters include at least one of: the type of the reference signal, the bandwidth occupied by the reference signal, the subcarrier spacing occupied by the reference signal, the density of the reference signal, the transmission period of the reference signal, the time domain offset value of the reference signal, the frequency domain offset value of the reference signal, and the code domain configuration parameter of the reference signal. For example, when the first device determines that the type of the reference signal is a specific type, it determines that the configuration parameter meets a preset condition, and the signal transmitted on the DC carrier needs to be discarded. For example, the reference signals are some important reference signals, such as demodulation reference signals DM-RS, phase tracking reference signals PT-RS, and the like, and if resources occupied when transmitting these important reference signals include a DC carrier, the first device may be affected to receive these reference signals, and the reference signals cannot be effectively demodulated, so that the position of the DC carrier may be adjusted to reduce the receiving influence on these reference signals.

In one possible design, the scheduling parameter includes at least one of: the type of the transmission data, the bandwidth occupied by the transmission data, the number of symbols occupied by the transmission data, the subcarrier spacing occupied by the transmission data, the modulation and coding scheme MCS of the transmission data, and the modulation order of the transmission data. For example, when the scheduling parameter is a bandwidth for transmitting data, and when the bandwidth for transmitting data is smaller than a preset threshold, it is determined that the position of the DC carrier needs to be adjusted. This is because when the bandwidth is smaller than a certain value, once a certain transmitted subcarrier is affected by DC, the influence on the overall system performance is more significant.

In one possible design, the signal characteristic includes at least one of: a received signal to interference and noise ratio SINR, a received signal to noise ratio SNR, a received interference and noise ratio INR, a reference signal received power RSRP, a reference signal received strength indication RSSI, and a reference signal received quality RSRQ.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal includes: if the type of the configuration parameter is determined to be a designated type, or if the bandwidth, or the subcarrier spacing, or the density, or the period, or the time domain offset value, or the frequency domain offset value, or the code domain configuration parameter is determined to be less than or equal to a preset threshold, the first device determines that the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received is set to be 0. For example, when the configuration parameter is the bandwidth of the reference signal, the preset threshold may be 1 physical resource block PRB, that is, when the bandwidth of the reference signal is less than 1PRB, it is determined to discard the signal to be sent on the DC carrier in the resource occupied by the signal to be received. When the configuration parameter is the bandwidth of the reference signal, the value of the preset threshold is related to the density of the PTRS, and the smaller the density of the PTRS is, the larger the preset threshold of the bandwidth is, and vice versa. For example, if the density of PTRS is only one RE in 4 PRBs, the preset threshold of the bandwidth may be 4 or 8, and when the bandwidth is less than the preset threshold, it is determined that the position of the DC carrier needs to be adjusted.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal includes: if the type of the scheduling parameter is determined to be a designated type, or if the bandwidth, or the number of symbols, or the subcarrier spacing is determined to be less than or equal to a preset threshold, or if the MCS or the modulation order is determined to be greater than or equal to the preset threshold, the first device determines to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to be 0. For example, when the type of the data transmitted by the first device is the designated type, the position of the DC carrier to be adjusted is determined. The specified type may be more important information such as control information, and the control information may specifically be channel state information CSI, HARQ (hybrid automatic repeat request), or related information of MIMO (multiple input multiple output). And if the resources occupied by the control information comprise the DC carrier, determining the position of the DC carrier to be adjusted.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal includes: if the first device determines that SINR, or SNR, or RSRP, or RSSI or RSRQ is less than or equal to the preset threshold, or if the first device determines that INR is greater than or equal to the preset threshold, the first device sets a bit value of a resource RE corresponding to a DC carrier in a resource occupied by the second signal to be received to 0. For example, when the signal characteristic is INR, the preset threshold may be, for example, a lowest detectable threshold corresponding to MCS at the time of current transmission. Different MCSs have different minimum detectable thresholds. And when the INR on the resource overlapped with the DC carrier is greater than or equal to a preset threshold value, determining that the position of the DC carrier needs to be adjusted. This is because, similar to SINR, a larger INR indicates a larger interference power and a lower SINR value. If resources occupied by the DMRS or PTRS using the OCC include a DC carrier, an equivalent reception INR value is further increased, and when the INR value is higher than a preset threshold, the position of the DC carrier needs to be adjusted, otherwise normal demodulation and reception of the INR may be affected.

In one possible design, when the first signal is a reference signal, RS, the RS comprises a phase tracking reference signal, PTRS, or a demodulation reference signal, DMRS; the resource occupied by the RS comprises at least one of the following: configuration parameters of the RS and signal characteristics on resources of the DC carrier occupied by the RS.

In one possible design, the configuration parameters of the RS include at least one of: bandwidth occupied by the RS, subcarrier spacing occupied by the RS, and transmission period of the RS.

In one possible design, the signal characteristic includes at least one of: the modulation coding scheme MCS of the signal, the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission period of the signal.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal includes: and if at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS is determined to be less than or equal to a preset threshold, the first device determines that the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received is set to be 0.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal includes: if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal, and the transmission cycle of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, the first device determines to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to be 0.

In one possible design, the first signal and the second signal are transmitted over a new air interface NR system. That is, the present application explains processing of a DC carrier in NR.

In a second aspect, a method for processing a dc carrier is provided, where the method includes: the first device sends a first signal to the second device; the first equipment determines whether the resource occupied by the first signal is overlapped with a Direct Current (DC) carrier set when the first equipment sends the first signal; if yes, the first device sets a bit value of a resource RE corresponding to a subcarrier overlapped with the DC carrier in a resource occupied by the second signal to be transmitted to be 0. Similar to the first aspect, the processing of the DC carrier by the first device when the transmitter of the first device transmits a signal is similar to the processing when the receiver of the first device receives a signal.

In a possible design, if the first device determines that the resource occupied by the first signal overlaps with a direct current DC carrier set when the first device transmits the first signal, before the first device sets a bit value of a resource RE corresponding to a subcarrier overlapping with the DC carrier in the resource occupied by the second signal to be transmitted to 0, the method further includes: and the first device determines whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0 according to the resource occupied by the first signal.

In one possible design, the resource occupied by the first signal includes at least one of: the method comprises the steps of configuring parameters of reference signals, scheduling parameters of transmission data and signal characteristics on resources where DC carriers are located; the resources occupied by the reference signal comprise a DC carrier, and the resources occupied by the transmission data comprise the DC carrier.

In one possible design, the configuration parameters include at least one of: the type of the reference signal, the bandwidth occupied by the reference signal, the subcarrier spacing occupied by the reference signal, the density of the reference signal, the transmission period of the reference signal, the time domain offset value of the reference signal, the frequency domain offset value of the reference signal, and the code domain configuration parameter of the reference signal.

In one possible design, the scheduling parameter includes at least one of: the type of the transmission data, the bandwidth occupied by the transmission data, the number of symbols occupied by the transmission data, the subcarrier spacing occupied by the transmission data, the modulation and coding scheme MCS of the transmission data, and the modulation order of the transmission data.

In one possible design, the determining, by the first device, whether to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted according to the resource includes: if the determined type is the designated type, or if the determined bandwidth, or the subcarrier spacing, or the density, or the period, or the time domain offset value, or the frequency domain offset value, or the code domain configuration parameter is less than or equal to the preset threshold, the first device determines to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted.

In one possible design, the determining, by the first device, whether to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted according to the resource includes: if the determined type is a designated type, or if the determined bandwidth, or the symbol number, or the subcarrier spacing is less than or equal to a preset threshold, or if the determined MCS or the determined modulation order is greater than or equal to the preset threshold, the first device determines to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted.

In one possible design, the determining, by the first device, whether to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be received according to the resource includes: if the first device determines that SINR, or SNR, or RSRP, or RSSI or RSRQ is less than or equal to a preset threshold, or if the first device determines that INR is greater than or equal to a preset threshold, the first device determines to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be transmitted to be 0 according to the resource occupied by the first signal includes: if it is determined that at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS, and the transmission period of the RS is less than or equal to a preset threshold, the first device determines to set a bit value of a resource RE corresponding to the DC carrier in a resource occupied by the second signal to be transmitted to be 0.

In one possible design, the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be transmitted to be 0 according to the resource occupied by the first signal includes: if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal, and the transmission period of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, the first device determines to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be transmitted to be 0.

In one possible design, the signal is transmitted over the new air interface NR system.

In a third aspect, an apparatus is provided, where the apparatus is a first apparatus, and includes: a transceiver for receiving a first signal from a second device; a processor for determining whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device receives the first signal; the processor is further configured to, if the determination is yes, set a bit value of a resource RE corresponding to a subcarrier overlapping the DC carrier in a resource occupied by the second signal to be received to 0.

In one possible design, the transceiver is further configured to: transmitting, to the second device, location information of a DC carrier on which the first device receives the first signal.

In one possible design, the processor is further to: and determining whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received as 0 or not according to the resource occupied by the first signal.

In one possible design, the processor is to: if the determined type is the designated type, or if the determined bandwidth, or the subcarrier spacing, or the density, or the period, or the time domain offset value, or the frequency domain offset value, or the code domain configuration parameter is less than or equal to the preset threshold value, determining to discard the signal to be transmitted in the resource occupied by the signal to be received and on the DC carrier.

In one possible design, the processor is to: if the determined type is a designated type, or if the determined bandwidth, or the symbol number, or the subcarrier spacing is less than or equal to a preset threshold, or if the determined MCS or the determined modulation order is greater than or equal to the preset threshold, the first device determines to discard the signal to be transmitted in the resource occupied by the signal to be received and on the DC carrier.

In one possible design, the processor is to: if the first device determines that the SINR, or the SNR, or the RSRP, or the RSSI or the RSRQ is less than or equal to the preset threshold, or if the INR is determined to be greater than or equal to the preset threshold, it determines to discard the signal to be transmitted on the DC carrier and in the resource occupied by the signal to be received.

In one possible design, the processor is to: and if at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS is determined to be less than or equal to a preset threshold, setting the bit value of a resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to be 0.

In one possible design, the processor is to: and if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission cycle of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, determining that the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received is set to be 0.

In one possible design, the first signal and the second signal are transmitted over a new air interface NR system.

In a fourth aspect, there is provided an apparatus, which is a first apparatus, including: a transceiver for transmitting a first signal to a second device; a processor for determining whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device transmits the first signal; and if so, setting the bit value of the resource RE corresponding to the subcarrier overlapped with the DC carrier in the resource occupied by the second signal to be transmitted to be 0.

In one possible design, the processor is further to: and determining whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0 according to the resource occupied by the first signal.

In one possible design, the processor is to: if the determined type is a designated type, or if the determined bandwidth, or the subcarrier spacing, or the density, or the period, or the time domain offset value, or the frequency domain offset value, or the code domain configuration parameter is less than or equal to a preset threshold value, determining to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted.

In one possible design, the processor is to: if the determined type is the designated type, or if the determined bandwidth, or the symbol number, or the subcarrier spacing is less than or equal to the preset threshold, or if the determined MCS or the modulation order is greater than or equal to the preset threshold, determining to discard the signal to be transmitted on the DC carrier in the resource occupied by the signal to be transmitted.

In one possible design, the processor is to: if the SINR, the SNR, the RSRP, the RSSI or the RSRQ is determined to be smaller than or equal to a preset threshold, or if the INR is determined to be larger than or equal to the preset threshold, the signal to be sent on the DC carrier in the resource occupied by the signal to be sent is determined to be discarded.

In one possible design, the processor is to: and if at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS is determined to be less than or equal to a preset threshold, setting the bit value of a resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0.

In one possible design, the processor is to: and if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission period of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, determining that the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent is set to be 0.

In a fifth aspect, a method for processing DC is provided, the method comprising: the first device receiving a first signal from a second device; the first equipment determines whether the resource occupied by the signal is overlapped with a Direct Current (DC) carrier set when the first equipment receives the signal; if the determination is yes, the first device adjusts the position of the DC carrier. The first device may adjust the position of the DC carrier to a sub-carrier corresponding to the non-critical information, or outside the scheduled transmission bandwidth, or outside the active BWP configured when the first device is scheduled, etc. Therefore, the UE adjusts the position of the DC carrier to receive the signal, the conflict between the position of the DC carrier and the frequency domain resource occupied by the key information when the UE receives the signal can be reduced, and the influence on the receiving performance of the UE is reduced.

In a sixth aspect, a method for processing DC is provided, the method comprising: the first device sends a signal to the second device; the first equipment determines whether the resource occupied by the signal is overlapped with a Direct Current (DC) carrier set when the first equipment sends the signal; if the determination is yes, the first device adjusts the position of the DC carrier. The sixth aspect is similar to the fifth aspect.

In one possible design, the first device adjusting the position of the DC carrier includes: the first equipment adjusts the position of a DC carrier within a time window without downlink scheduling; the time window without downlink scheduling is the time without downlink scheduling in a time slot, or the time without downlink scheduling is the time for reconfiguring the bandwidth part BWP, or the time without downlink scheduling is the time for updating the bandwidth part BWP. When the first device adjusts the position of the DC carrier, a certain time for adjusting the DC carrier is needed, and the first device may interrupt the signal reception in consideration of modifying the position of the DC carrier.

In a seventh aspect, an apparatus is provided, where the apparatus is a first apparatus, and includes: a transceiver for receiving a signal from a second device; a processor for determining whether a resource occupied by the signal overlaps with a Direct Current (DC) carrier set when the first device receives the signal; the processor is further configured to adjust the location of the DC carrier if the determination is yes.

In an eighth aspect, there is provided an apparatus, which is a first apparatus, comprising: a transceiver for transmitting a signal to a second device; a processor for determining whether a resource occupied by the signal overlaps with a Direct Current (DC) carrier set when the first device transmits the signal; if the determination is yes, the position of the DC carrier is adjusted.

Therefore, when the first device determines that the resource occupied by the signal overlaps with the direct current DC carrier set when the first device receives the signal, the method and the device can select to discard the signal on the DC carrier or adjust the position of the DC carrier, thereby reducing the influence on the data received or transmitted by the first device.

Drawings

Fig. 1 is a schematic network architecture of a cellular link according to an embodiment of the present application;

fig. 2 is a schematic network architecture diagram of a D2D link according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a network architecture of a backhaul link between BSs according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a method for processing a DC carrier according to an embodiment of the present disclosure;

fig. 5 is a flowchart illustrating a method for processing a DC carrier according to an embodiment of the present application;

fig. 6 is a flowchart illustrating a method for processing a DC carrier according to an embodiment of the present application;

fig. 7 is a flowchart illustrating a method for processing a DC carrier according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a method for processing a DC carrier according to an embodiment of the present application;

fig. 9 is a flowchart illustrating a method for processing a DC carrier according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a UE according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a UE according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a UE according to an embodiment of the present application.

Detailed Description

For ease of understanding, some of the concepts related to the present application are illustratively presented for reference. As follows:

the DC carrier, which is the center of an (Orthogonal Frequency Division Multiplexing, OFDM) channel, is an unused subcarrier at the center of a Long Term Evolution (LTE) downlink carrier, is set to avoid high interference due to possible leakage of a local crystal oscillator, and is not generally used for data transmission.

Device to Device (Device to Device, D2D): for communication between devices based on cellular networks, it is meant that user data can be transmitted directly between terminal devices without passing through network transit.

Physical Resource Block (PRB): which is 12 subcarriers continuously occupied on the frequency domain. The time domain (slot) includes 12 or 14 symbols or less. When the number of symbols is less than 12 or 14 symbols, it is generally called a mini-slot (mini-slot).

The embodiments of the present application may be used in the process of transmitting and receiving data or signals between cellular links, D2D links, or backhaul links between Base Stations (BSs).

As shown in fig. 1, the network architecture of the cellular link may include a base station and a plurality of terminal devices, the base station may be replaced by other types of network devices such as a relay station, the terminal devices may be UEs, and fig. 1 only shows UE1 and UE 2. The uplink may be, for example, a link between UE1 or UE2 to a base station, and the downlink may be a link between a base station to UE1 or a link between a base station to UE 2.

As shown in fig. 2, when the network architecture of the D2D link may include at least two terminal devices, for example, UE1 and UE2, the D2D link is a link between UE1 and UE2, and data or signals may be transmitted through a direct link.

As shown in fig. 3, the network architecture of the backhaul link between BSs may include at least two BSs, including, for example, BS1 and BS 2. BS1 and BS2 may be the same type of base station or different types of base stations, for example, backhaul links are links between macro stations and macro stations, links between micro stations and micro stations, links between macro stations and micro stations, and the like.

The technical scheme of the application can be used for various network elements with transmission functions between the receiving and sending parties of communication, such as a base station, relay equipment, terminal equipment and the like, and the network elements mainly involved comprise UE, the base station and the relay equipment. The UE may also be a UE for a cellular link, a UE for sidelink, or the like, and the base station may participate in uplink transmission or downlink transmission. In the 5G communication system, devices providing a base station function include an evolved node B (eNB), a New Radio node B (gNB), a Centralized Unit (CU), a Distributed Unit (Distributed Unit), a New Radio controller, and the like. The UE may be a mobile terminal device or an immobile terminal device. The device is mainly used for receiving or sending service data. The user equipments may be distributed in networks where the user equipments have different names, such as: a terminal, mobile station, subscriber unit, station, cellular telephone, personal digital assistant, wireless modem, wireless communication device, handheld device, laptop computer, cordless telephone, wireless local loop station, or the like. The user equipment may communicate with one or more core networks via a Radio Access Network (RAN), an access portion of a wireless communication network, for example to exchange voice and/or data with the radio access network.

By applying the network architecture, if some key information is scheduled to the DC of the UE when the base station schedules resources, the UE cannot obtain the key information because the information carried on the DC is not demodulated, so that scheduling errors occur and the performance of a UE receiver is influenced. Although the RAN1 standard agrees to signal the DC carrier location of the downlink transmission signal of the UE to the UE at 1#93 conferences in a Radio Access Network (RAN), and the RAN1 standard agrees to signal the DC carrier location of the uplink transmission signal of the UE to the UE at 1#93 conferences, the agreed conclusion in the standard does not solve the problem that the base station does not know the location of the downlink received DC carrier of the UE, and thus a base station scheduling error may occur. Similarly, if the UE does not report the location of the uplink DC carrier, it also has a performance impact on the detection of uplink reception by the base station.

In the method, when the UE receives downlink data or signals, the UE needs to judge whether the currently used carrier for receiving the data or signals is overlapped with the DC carrier, if the currently used carrier for receiving the data or signals is overlapped with the DC carrier, the position of the DC carrier needs to be adjusted or the signals on the subcarriers overlapped with the DC carrier need to be discarded, the conflict between the DC carrier and the frequency domain position of the transmission resource of key information can be reduced, and further, the performance influence when the UE is used as a transmitter or a receiver is reduced.

The following describes examples of the present application.

An embodiment of the present application provides a method for processing a DC carrier, as shown in fig. 4, including:

401. the first device receives a first signal from a second device.

In this embodiment, the first device may be a baseband processor, or a System on Chip (SoC), or a terminal device of the terminal device, and the second device may be the terminal device or the base station.

For example, the first device is a UE in a cellular link, the second device is a base station in a cellular link, or both the first device and the second device are UEs in a D2D link.

402. The first device determines whether a resource occupied by the first signal overlaps with a DC carrier set when the first device receives the first signal.

The resources occupied by the first signal include time-frequency domain resources, the frequency domain resources are subcarriers occupied by the first signal, step 402 is to determine whether the subcarriers occupied when receiving the first signal overlap with the DC carrier, if the subcarriers overlap with the DC carrier, since the first device does not perform any processing on part of the signals on the DC carrier, part of the signals on the DC carrier cannot be effectively demodulated, and thus, effective information of part of the signals on the DC carrier cannot be obtained.

403. If so, the first device adjusts the position of the DC carrier, or sets the bit value of the resource RE corresponding to the subcarrier overlapping with the DC carrier in the resource occupied by the second signal to be received to 0.

If the sub-carrier occupied by the first device when receiving the signal overlaps with the DC carrier, in a first possible manner, the first device may adjust the position of the DC carrier, that is, set another sub-carrier as the DC carrier, so that when the first device receives the signal sent by the second device again, the frequency domain resource when receiving the signal may not include the DC carrier, thereby effectively demodulating the signal received again, and improving the receiving performance. Or, in another possible manner, the first device sets the bit value of the resource RE corresponding to the subcarrier overlapping the DC carrier to 0, that is, only demodulates the remaining signal on the non-DC carrier, so as to reduce the influence of the DC carrier on the signal received by the first device as much as possible, and does not need to adjust the position of the DC carrier, so that the complexity is reduced.

The embodiments of the present application are further described below according to two possible ways in the above embodiments, and first, a first possible way is described, taking the first device as a UE and the second device as a base station as an example.

An embodiment of the present application provides a method for processing a DC carrier, as shown in fig. 5, including:

501. the UE receives a first signal from a base station.

The UE may receive signals from the antenna port and input the signals to Radio Frequency (RF) circuitry, which processes the signals in a processor that transmits the signals to the UE.

502. The UE determines whether the resource occupied by the signal when receiving the first signal overlaps with the DC carrier set when the UE receives the first signal, and if so, performs step 503.

Step 502 may be understood as that the processor of the UE determines whether the frequency domain resource when receiving the first signal overlaps with the DC carrier set when the UE receives the first signal.

The embodiment shown in fig. 4 illustrates that, if the frequency domain resource occupied by the first signal overlaps with the DC carrier, the position of the DC carrier is adjusted, and in order to more accurately determine whether the position of the DC carrier needs to be adjusted, it may be further determined whether the receiving resource configured by the base station satisfies a preset condition, because if the property of the receiving resource affects the first signal and, if the first signal is transmitted on the DC carrier, has a large impact on the signal receiving performance of the UE, the position of the DC carrier needs to be adjusted. Step 503 is to further analyze the received resources.

In this embodiment, before the UE receives the first signal, the UE may send, to the base station, location information of a DC carrier used for receiving the first signal, so as to determine whether a resource of the received signal overlaps with the DC carrier, that is, the DC carrier is the received carrier.

503. The UE determines whether the resource satisfies a predetermined condition, and if so, performs step 504.

Step 503 may also be understood as the UE determining whether to adjust the position of the DC carrier according to the resources occupied by the first signal.

Here, the resource is a receiving resource configured by the base station to the UE, the receiving resource is issued to the UE through configuration information, and the UE needs to analyze the receiving resource before determining whether to adjust the position of the DC carrier.

The receiving resource includes at least one of: configuration parameters of reference signals, scheduling parameters of transmission data and signal characteristics on resources where DCs are located; wherein the resources occupied by the reference signal include the DC carrier, and the resources occupied by the transmission data include the DC carrier. That is, if the configuration parameter, the scheduling parameter or the signal characteristic satisfies the preset condition, it indicates that the current receiving resource may affect the receiving performance when the signal is transmitted on the DC carrier.

For example, the configuration parameter of the reference signal may include a type of the reference signal, a bandwidth occupied by the reference signal, a subcarrier spacing occupied by the reference signal, a density of the reference signal, a transmission period of the reference signal, a time domain offset value of the reference signal, a frequency domain offset value of the reference signal, and a code domain configuration parameter of the reference signal.

Based on the above example, determining whether the configuration parameter of the reference signal satisfies the preset condition may be implemented as follows:

and when the UE determines that the type of the reference signal is the designated type, determining that the configuration parameters meet the preset conditions. For example, the Reference signals are some important Reference signals, such as Demodulation Reference signals (DM-RS), Phase-tracking Reference signals (PT-RS), and the like, and if resources occupied when transmitting these important Reference signals include DC carriers, the UE may be affected to receive these Reference signals, and the Reference signals cannot be effectively demodulated, so that the position of the DC carriers may be adjusted to reduce the receiving influence on these Reference signals;

or when the UE determines that the bandwidth, or subcarrier spacing (SCS), or density, or period, or time domain offset value, or frequency domain offset value, or code domain configuration parameter of the reference signal is less than or equal to a preset threshold, it determines that the configuration parameter meets a preset condition. Such a preset threshold is not fixed, and varies according to parameters.

For example, when the configuration parameter is the bandwidth of the reference signal, the preset threshold may be 1PRB, that is, when the bandwidth of the reference signal is less than 1PRB, it is determined that the configuration parameter meets the preset condition. When the configuration parameter is the bandwidth of the reference signal, the value of the preset threshold is related to the density of the PTRS, and the smaller the density of the PTRS is, the larger the preset threshold of the bandwidth is, and vice versa. For example, if the density of PTRS is only one RE in 4 PRBs, the preset threshold of the bandwidth may be 4 or 8, and when the bandwidth is less than the preset threshold, it is determined that the position of the DC carrier needs to be adjusted.

When the configuration parameter is the subcarrier interval of the reference signal, the preset threshold is determined according to the size of the SCS, the SCS with different sizes is associated with different modes (patterns) of the reference signal, the patterns of the different reference signals can correspond to different preset thresholds, when the SCS is smaller than the preset threshold, the number of symbols of the DMRS corresponding to the small SCS is large in a high-speed mobile scene, and at the moment, if the DMRS of a certain symbol is influenced, the position of the DC carrier needing to be adjusted is determined.

When the configuration parameter is the density of the reference signal, for example, the preset threshold may be 4 PRBs, that is, if the frequency domain density of the reference signal is greater than 4 PRBs, the position of the DC carrier to be adjusted is determined. The smaller the frequency domain density of the reference signal is, the more sparse the reference signal is in a certain frequency domain resource is. Under this condition, once a part of the reference signal is affected by the DC carrier, the estimation performance of the reference signal is greatly affected.

When the configuration parameter is the period of the reference signal, for example, the preset threshold may be 20ms or 100ms, that is, if the density of the reference signal is less than 4 PRBs, the position of the DC carrier to be adjusted is determined.

The configuration parameter is a time domain offset value of the reference signal, when the time domain offset value is smaller than a corresponding preset threshold value, the position of the DC carrier needs to be adjusted, and when the time domain offset value is larger than the preset threshold value, the performance of the reference signal is greatly influenced.

The configuration parameter is a frequency domain offset value of the reference signal, and when the frequency domain offset value is smaller than a corresponding preset threshold value, the position of the DC carrier needs to be adjusted. When the frequency domain deviation value is larger than the preset threshold value, the performance of the reference signal is greatly influenced.

When the configuration parameter is a Code domain configuration parameter of the reference signal, for example, the Code domain configuration parameter may be a sequence length of the reference signal, the reference signal may be an Orthogonal Cover Code (OCC), and the preset threshold may be 2 or 3.

Illustratively, the scheduling parameter for transmitting the data may include at least one of: the type of the transmission data, the bandwidth occupied by the transmission data, the number of symbols occupied by the transmission data, the subcarrier spacing occupied by the transmission data, the Modulation Coding Scheme (MCS) of the transmission data, and the Modulation order of the transmission data.

Based on the above example, determining whether the scheduling parameter of the transmission data satisfies the preset condition may be implemented as follows:

and when the type of the data transmitted by the UE is the designated type, determining the position of the DC carrier needing to be adjusted. The specified type may be more important Information such as control Information, and the control Information may specifically be related Information of Channel State Information (CSI), Hybrid Automatic Repeat reQuest (HARQ), Multiple-Input Multiple-Output (MIMO), and the like. And if the resources occupied by the control information comprise the DC carrier, determining the position of the DC carrier to be adjusted.

When the scheduling parameter is a bandwidth for transmitting data, the preset threshold may be one or more resource block groups, for example. E.g. 2 resource block groups, each having a size predefined by the protocol, e.g. 4, 8 or 16, etc. As another example, the preset threshold may be a fixed large number of PRBs, such as 4 PRBs, for example. Namely, when the bandwidth of the transmission data is less than the preset threshold value, the position of the DC carrier needing to be adjusted is determined. This is because when the bandwidth is smaller than a certain value, once a certain transmitted subcarrier is affected by DC, the influence on the overall system performance is more significant.

When the scheduling parameter is the number of symbols occupied by transmission data, the preset threshold may be 1, 2 or 3 symbols, for example. Namely, when the number of symbols occupied by the transmission data is less than a preset threshold value, the position of the DC carrier needing to be adjusted is determined. This is because when the number of symbols is less than a certain value, once a certain transmitted symbol is affected by DC, the influence on the performance of the entire system is more significant.

When the scheduling parameter is the subcarrier spacing for transmitting data, the preset threshold may be, for example, 60 kHz. That is, when the subcarrier interval for transmitting data is smaller than a preset threshold, the position of the DC carrier to be adjusted is determined. When the subcarrier spacing is larger, the DC subcarrier has a larger influence on the data or reference signal, and is generally used in a high-speed moving scene or a high-frequency scene.

When the scheduling parameter is an MCS for transmitting data, the preset threshold may be, for example, a configuration value that a code rate is greater than 0.75, or a spectrum efficiency corresponding to the MCS is greater than 3 or 4. And when the MCS of the transmission data is larger than a preset threshold value, determining the position of the DC carrier needing to be adjusted. This is because, when the MCS value is large, for example, when the code rate value is high for high-order modulation of 64 Quadrature Amplitude Modulation (QAM) or 256QAM, the SINR (Signal to Interference plus Noise Ratio) is required to be higher. When the resources occupied by important reference signals such as DMRS or PTRS include a DC carrier, the effective received SINR is reduced, which has a large influence on decoding performance, and therefore, when the MCS is greater than a preset threshold, the position of the DC carrier needs to be adjusted.

When the scheduling parameter is a modulation order of the transmission data, the preset threshold may be 64QAM or 1024QAM, for example. When the modulation order is greater than or equal to the preset threshold, the position of the DC carrier to be adjusted is determined, since the higher the modulation phase, the lower the tolerance for the occurrence of the difference. Once an error occurs due to DC, the higher the risk of an error occurring.

Illustratively, the signal characteristics on the resource overlapping the DC carrier include at least one of:

SINR, Received Signal Noise Ratio (SNR), Received dry Noise Ratio (INR), Reference Signal Received Power (RSRP), Reference Signal Received Strength Indication (RSSI), and Reference Signal Received Quality (RSRQ).

It should be noted that the preset threshold corresponding to the above parameters is related to the received signal quality of the UE (which may be characterized by any of the above parameters SINR, SNR, INR, RSRP, RSSI, and RSRQ), and is not fixed. The better the signal quality, the higher the corresponding preset threshold value; otherwise, the worse the signal quality, the lower the corresponding preset threshold value. The reason is that the better the signal quality, the stronger the resistance or fault tolerance of the receiver is accounted for, and therefore the higher the threshold of the corresponding parameter can be.

Further optionally, it may also be determined whether to adjust the DC position according to a signal quality parameter obtained by the UE as the receiving side. This is because when the signal quality is good, the receiver is hardly affected by other interference or noise, and even if only DC is applied, the receiver can resist the influence. Conversely, when the signal quality is poor, the receiver is in a critical state of reception whether it can successfully detect, and when it is further affected by DC, the receiver has a high possibility of error. The criteria for good and bad signal quality are determined by preset thresholds of parameters characterizing the respective signal quality.

When the signal characteristic is SINR, the preset threshold may be, for example, a lowest detectable threshold corresponding to MCS in current transmission. Different MCSs have different minimum detectable thresholds. And when the SINR on the resource overlapped with the DC carrier is less than or equal to a preset threshold value, determining the position of the DC carrier needing to be adjusted. This is because when the SINR is low, it indicates that the currently received signal quality is poor, if the resources of the important reference signals, such as the DMRS or PTRS using the OCC, include the DC carrier, the equivalent received SINR value may be further reduced, when the SINR value is lower than a certain threshold, the position of the DC carrier needs to be adjusted, otherwise, normal signal demodulation and reception may be affected.

When the signal characteristic is SNR, the preset threshold may be, for example, a lowest detectable threshold corresponding to MCS at the time of current transmission. Different MCSs have different minimum detectable thresholds. And when the SNR of the resource overlapped with the DC carrier is less than or equal to a preset threshold value, determining the position of the DC carrier to be adjusted.

When the signal characteristic is INR, the preset threshold may be, for example, a lowest detectable threshold corresponding to MCS at the time of current transmission. Different MCSs have different minimum detectable thresholds. And when the INR on the resource overlapped with the DC carrier is greater than or equal to a preset threshold value, determining that the position of the DC carrier needs to be adjusted. This is because, similar to SINR, a larger INR indicates a larger interference power and a lower SINR value. If resources occupied by the DMRS or PTRS using the OCC include a DC carrier, an equivalent reception INR value is further increased, and when the INR value is higher than a preset threshold, the position of the DC carrier needs to be adjusted, otherwise normal demodulation and reception of the INR may be affected.

When the signal characteristic is RSRP, the preset threshold may be, for example, a lowest detectable threshold corresponding to the MCS at the time of current transmission. Different MCSs have different minimum detectable thresholds. And when the RSRP on the resource overlapped with the DC carrier is less than or equal to a preset threshold value, determining the position of the DC carrier to be adjusted.

When the signal characteristic is RSSI, the preset threshold may be, for example, a lowest detectable threshold corresponding to MCS in current transmission. Different MCSs have different minimum detectable thresholds. And when the RSSI on the resource overlapped with the DC carrier is less than or equal to a preset threshold value, determining the position of the DC carrier needing to be adjusted.

When the signal characteristic is RSRQ, the preset threshold may be, for example, a lowest detectable threshold corresponding to MCS at the time of current transmission. Different MCSs have different minimum detectable thresholds. And when the RSRQ on the resource overlapped with the DC carrier is less than or equal to a preset threshold value, determining the position of the DC carrier needing to be adjusted.

504. The UE adjusts the location of the DC carrier.

Optionally, the UE may adjust the position of the DC carrier to a subcarrier corresponding to the non-critical information, or adjust the position of the DC carrier to be outside the scheduled transmission bandwidth, or adjust the position of the DC carrier to be outside the active BWP configured when the UE is scheduled, or the like.

When the UE adjusts the position of the DC carrier, a certain time for adjusting the DC carrier is required, and the UE may interrupt signal reception by considering that the position of the DC carrier is modified, so that in this application, when the UE determines that the DC carrier of the received signal is to be adjusted, the UE may determine an adjustment opportunity, and adjust within the adjustment opportunity.

In one possible implementation, the UE adjusts the position of the DC carrier within a time window without downlink scheduling.

The timing adjustment needs to be self-determined by the UE, for example, the time window without downlink scheduling is a time without scheduling in a time slot, or the time window without downlink scheduling is a time for reconfiguring the bandwidth part BWP, or the time window without downlink scheduling is a time for updating the bandwidth part BWP.

Therefore, the UE adjusts the position of the DC carrier to receive the signal, the conflict between the position of the DC carrier and the frequency domain resource occupied by the key information when the UE receives the signal can be reduced, and the influence on the receiving performance of the UE is reduced.

A second possible implementation in the embodiment corresponding to fig. 4 is further described below.

An embodiment of the present application provides a method for processing a dc carrier, as shown in fig. 6, including:

601. the UE receives a first signal from a base station.

602. The UE determines whether the resource occupied by the first signal overlaps with a DC carrier set when the UE receives the first signal, and if so, performs step 603.

603. The UE determines whether the resource satisfies a predetermined condition, and if so, performs step 604.

Step 603 may also be understood as that the UE determines whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal.

The specific implementation of steps 601 to 603 can refer to steps 501 to 503, which are not described herein again.

604. And the UE sets the bit value of the resource RE corresponding to the subcarrier overlapped with the DC carrier in the resource occupied by the second signal to be received to be 0.

It can also be said that the RF circuit of the UE discards the signal to be received occupying the DC carrier, and sends the signal to be received remaining on the non-DC carrier to the processor of the UE for further processing.

That is, the UE will subtract the signal on the DC carrier, without the need to adjust the DC carrier, resulting in reduced complexity. For example, the embodiment is suitable for a scenario where the UE receives a signal through the DC carrier and the reception performance of the UE is less affected. For example, the signal quality of the currently received signal is better, and the configuration value of the configuration information of the currently received signal is a more robust configuration. For example configured to: larger bandwidth, lower MCS or higher density of reference signals, etc.

In a downlink system of LTE, no signal is transmitted or carried on a DC carrier, and when the present application is applied to a New Radio (NR) system of 5G, in an embodiment, it is described that a signal on a subcarrier corresponding to the DC carrier is to be discarded.

Assuming that the bandwidth when the base station transmits a signal is 4PRB, after resources occupied by various reference signals are deducted, assuming that the number of subcarriers for transmitting data by the base station is 50 REs, and assuming that MCS of the base station corresponds to Quadrature Phase Shift Keying (QPSK) modulation and 1/4 code rate, a total of 2 × 50 to 100 coded bits can be carried by 50 REs.

In the downlink system of LTE, the base station knows the location of the DC carrier received by the downlink of the UE, because no signal is transmitted or carried on the DC carrier, so the receiver of the UE receives these signals, and then obtains 100 bits before decoding.

Whereas for NR receivers, the base station does not know the location of the UE's downlink received DC carrier. Therefore, when the DC carrier overlaps with a certain data RE when the UE receives a signal, or a signal on a subcarrier overlapping with the DC carrier among resources occupied by the signal received by the UE is discarded. But the receiver of the UE, after discarding the signal on this RE, gets the number of REs (50-1 ═ 49). Correspondingly, the UE may obtain 49 × 2 ═ 98 bits of information to be decoded from the 49 REs.

So after the receiver discards the signal on this RE, i.e. the corresponding puncturing operation is performed on the receiver side: after 0 is filled in the signal on the RE overlapped with the DC carrier, the data of 50 REs is obtained according to the filled 0, then 100 soft bits to be decoded are obtained according to the symbols of the 50 REs, and 25 information bits (with code rate of 1/4) are obtained after decoding.

Fig. 4, fig. 5, and fig. 6 illustrate a scenario in which a UE receives a signal, and accordingly, the technical solution of the present application may also be applied to a scenario in which the UE sends a signal.

An embodiment of the present application provides a method for processing a dc carrier, as shown in fig. 7, including:

701. the first device transmits a first signal to the second device.

702. The first device determines whether a resource occupied by the first signal overlaps with a DC carrier set when the first device transmits the first signal.

703. If so, the first device adjusts the position of the DC carrier, or sets the bit value of the resource RE corresponding to the subcarrier overlapping with the DC carrier in the resource occupied by the transmitted second signal to 0.

The specific implementation of steps 701 to 703 is similar to that of the embodiment corresponding to fig. 4, and is not described here again.

An embodiment of the present application provides a method for processing a dc carrier, as shown in fig. 8, including:

801. the UE transmits a first signal to a base station.

802. The UE determines whether the resource occupied by the first signal overlaps with a DC carrier set when the UE transmits the first signal, and if so, performs step 803.

803. The UE determines whether the resource meets a preset condition, and if so, performs step 804.

804. The UE adjusts the location of the DC carrier.

The specific implementation of steps 801 to 803 is similar to that of the embodiment corresponding to fig. 5, and is not described here again.

An embodiment of the present application provides a method for processing a dc carrier, as shown in fig. 9, including:

901. the UE transmits a first signal to a base station.

902. The UE determines whether the resource occupied by the first signal overlaps with a DC carrier set when the UE transmits the first signal, and if so, performs step 903.

903. The UE determines whether the resource satisfies a predetermined condition, and if so, performs step 904.

904. And the UE sets the bit value of the resource RE corresponding to the subcarrier overlapped with the DC carrier in the resource occupied by the second signal to be sent to be 0.

The specific implementation of steps 901 to 904 is similar to that of the embodiment corresponding to fig. 6, and is not described here again.

Through the embodiments, the scheme provided by the application can adjust the position of the DC carrier or discard the signal transmitted on the DC carrier when the RC carrier is scheduled to transmit the signal, so as to reduce the receiving performance influence and the sending performance influence of the UE.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, such as the first device, the second device, the UE, and the like, includes a hardware structure and/or a software module for performing each function in order to implement the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the first device may be divided into the functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of adopting the functional modules divided according to the respective functions, fig. 10 shows a possible structural schematic diagram of the first device involved in the foregoing embodiment, and when the first device is a UE, the UE100 includes: receiving section 1001, processing section 1002, and transmitting section 1003. The receiving unit 1001 is configured to support the UE to perform the process 401 in fig. 4, the process 501 in fig. 5, the process 601 in fig. 6, the processing unit 1002 is configured to support the UE to perform the processes 402 and 403 in fig. 4, the processes 502, 503 and 504 in fig. 5, the process 602 and 604 in fig. 6, the processes 702 and 703 in fig. 7, the process 802 and 804 in fig. 8, the process 902 and 904 in fig. 9, and the sending unit 1003 is configured to support the UE to perform the process 701 in fig. 7, the process 801 in fig. 8, and the process 901 in fig. 9. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the case of an integrated unit, fig. 11 shows a possible structural schematic of the first device referred to in the above-described embodiment. When the first device is a UE, the UE110 includes: a processing module 1102 and a communication module 1103. The processing module 1102 is configured to control and manage actions of the UE, for example, the processing module 1102 is configured to support the UE to perform the processes 402 and 403 in fig. 4, the processes 502, 503 and 504 in fig. 5, the processes 602 and 604 in fig. 6, the processes 702 and 703 in fig. 7, the processes 802 and 804 in fig. 8, the processes 902 and 904 in fig. 9, and/or other processes for the technologies described herein. The communication module 1103 is used to support communication between the UE and other network entities, such as the functional modules or network entities shown in fig. 1, 2, and 3. The UE may also include a storage module 1101 for storing program codes and data for the UE.

The Processing module 1102 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 1103 may be a transceiver, a transceiving circuit, a communication interface, or the like. The storage module 1101 may be a memory.

When the processing module 1102 is a processor, the communication module 1103 is a transceiver, and the storage module 1101 is a memory, the UE according to the embodiment of the present application may be the UE shown in fig. 12.

Referring to fig. 12, the UE120 includes: a processor 1202, a transceiver 1203, a memory 1201 and a bus 1204. Wherein, the transceiver 1203, the processor 1202 and the memory 1201 are connected to each other by a bus 1204; the bus 1204 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for processing a direct current carrier, the method comprising:

the first device receiving a first signal from a second device;

the first device determines whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device receives the first signal;

if so, the first device sets a bit value of a resource RE corresponding to a subcarrier overlapped with the DC carrier in a resource occupied by the second signal to be received to 0.
The method of claim 1, further comprising:

the first device sends, to the second device, location information of a DC carrier on which the first device receives the first signal.
The method according to claim 1 or 2, wherein if the first device determines that the resource occupied by the first signal overlaps with a direct current DC carrier set when the first device receives the first signal, before the first device sets a bit value of a resource RE corresponding to a subcarrier overlapping with the DC carrier in a resource occupied by a second signal to be received to 0, the method further comprises:

and the first device determines whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 according to the resource occupied by the first signal.
The method according to any one of claims 1-3, wherein when the first signal is a reference signal, RS, the RS comprises a phase tracking reference signal, PTRS, or a demodulation reference signal, DMRS;

the resource occupied by the RS comprises at least one of the following:

configuration parameters of the RS and signal characteristics on resources of the DC carrier occupied by the RS.
The method of claim 4, wherein the configuration parameters of the RS comprise at least one of:

the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS.
The method of claim 4, wherein the signal characteristic comprises at least one of:

the modulation coding scheme MCS of the signal, the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission period of the signal.
The method according to claim 5, wherein the determining, by the first device according to the resource occupied by the first signal, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 includes:

if it is determined that at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS, and the transmission period of the RS is less than or equal to a preset threshold, the first device determines to set a bit value of a resource RE corresponding to the DC carrier in a resource occupied by the second signal to be received to 0.
The method according to claim 6, wherein the determining, by the first device according to the resource occupied by the first signal, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0 includes:

if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal, and the transmission cycle of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, the first device determines to set a bit value of a resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to 0.
The method according to any of claims 1-8, characterized in that the first signal and the second signal are transmitted in a new air interface, NR, system.
A method for processing a direct current carrier, the method comprising:

the first device sends a first signal to the second device;

the first device determines whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device transmits the first signal;

if so, the first device sets a bit value of a resource RE corresponding to a subcarrier overlapping with the DC carrier in a resource occupied by a second signal to be transmitted to 0.
The method according to claim 10, wherein if the first device determines that the resource occupied by the first signal overlaps with a direct current DC carrier set when the first device transmits the first signal, before the first device sets a bit value of a resource RE corresponding to a subcarrier overlapping with the DC carrier in a resource occupied by a second signal to be transmitted to be 0, the method further comprises:

and the first device determines whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0 according to the resource occupied by the first signal.
The method according to claim 10 or 11, wherein when the first signal is a reference signal, RS, the RS comprises a phase tracking reference signal, PTRS, or a demodulation reference signal, DMRS;

the resource occupied by the RS comprises at least one of the following:

configuration parameters of the RS and signal characteristics on resources of the DC carrier occupied by the RS.
The method of claim 12, wherein the configuration parameters of the RS comprise at least one of:

the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS.
The method of claim 12, wherein the signal characteristic comprises at least one of:

the modulation coding scheme MCS of the signal, the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission period of the signal.
The method according to claim 13, wherein the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0 according to the resource occupied by the first signal comprises:

if it is determined that at least one of the bandwidth occupied by the RS, the subcarrier spacing occupied by the RS, and the transmission period of the RS is less than or equal to a preset threshold, the first device determines to set a bit value of a resource RE corresponding to the DC carrier in a resource occupied by the second signal to be transmitted to 0.
The method according to claim 14, wherein the determining, by the first device, whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0 according to the resource occupied by the first signal comprises:

if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal, and the transmission cycle of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, the first device determines to set a bit value of a resource RE corresponding to the DC carrier in a resource occupied by the second signal to be sent to be 0.
The method according to any of claims 10-16, characterized in that the first signal and the second signal are transmitted in a new air interface, NR, system.
An apparatus, the apparatus being a first apparatus, comprising:

a transceiver for receiving a first signal from a second device;

a processor configured to determine whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device receives the first signal;

the processor is further configured to, if the determination is yes, set a bit value of a resource RE corresponding to a subcarrier overlapping the DC carrier in a resource occupied by the second signal to be received to 0.
The device of claim 18, wherein the transceiver is configured to:

transmitting, to the second device, location information of a DC carrier on which the first device receives the first signal.
The apparatus of claim 18 or 19, wherein the processor is further configured to:

and determining whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received as 0 or not according to the resource occupied by the first signal.
The apparatus of any one of claims 18-20, wherein when the first signal is a reference signal, RS, the RS comprises a phase tracking reference signal, PTRS, or a demodulation reference signal, DMRS;

the resource occupied by the RS comprises at least one of the following:

configuration parameters of the RS and signal characteristics on resources of the DC carrier occupied by the RS.
The apparatus of claim 21, wherein the configuration parameters of the RS comprise at least one of:

the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS.
The apparatus of claim 21, wherein the signal characteristic comprises at least one of:

the modulation coding scheme MCS of the signal, the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission period of the signal.
The device of claim 22, wherein the processor is configured to:

and if at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS is determined to be less than or equal to a preset threshold, setting a bit value of a resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to be 0.
The device of claim 23, wherein the processor is configured to: and if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission cycle of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, determining to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be received to be 0.
The apparatus of any of claims 18-25, wherein the first signal and the second signal are transmitted in a new air interface, NR, system.
An apparatus, the apparatus being a first apparatus, comprising:

a transceiver for transmitting a first signal to a second device;

a processor, configured to determine whether a resource occupied by the first signal overlaps with a Direct Current (DC) carrier set when the first device transmits the first signal;

the processor is further configured to set a bit value of a resource RE corresponding to a subcarrier overlapping the DC carrier in a resource occupied by the second signal to be transmitted to 0 if the determination is yes.
The device of claim 27, wherein the processor is configured to:

and determining whether to set the bit value of the resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0 according to the resource occupied by the first signal.
The apparatus of claim 27 or 28, wherein when the first signal is a reference signal, RS, the RS comprises a phase tracking reference signal, PTRS, or a demodulation reference signal, DMRS;

the resource occupied by the RS comprises at least one of the following:

configuration parameters of the RS and signal characteristics on resources of the DC carrier occupied by the RS.
The apparatus of claim 29, wherein the configuration parameters of the RS comprise at least one of:

the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS.
The apparatus of claim 29, wherein the signal characteristic comprises at least one of:

the modulation coding scheme MCS of the signal, the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission period of the signal.
The device of claim 30, wherein the processor is configured to:

and if at least one of the bandwidth occupied by the RS, the subcarrier interval occupied by the RS and the transmission period of the RS is determined to be less than or equal to a preset threshold, setting a bit value of a resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0.
The device of claim 31, wherein the processor is configured to:

and if the number of symbols occupied by the signal, the bandwidth occupied by the signal, the subcarrier interval of the signal and the transmission cycle of the signal are determined to be less than or equal to a preset threshold, or if the MCS is determined to be greater than or equal to the preset threshold, determining to set a bit value of a resource RE corresponding to the DC carrier in the resource occupied by the second signal to be sent to be 0.
The apparatus of any of claims 27-33, wherein the first signal and the second signal are transmitted in a new air interface, NR, system.