CN110808809B - Signal transmission method and device - Google Patents
Signal transmission method and device Download PDFInfo
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- CN110808809B CN110808809B CN201810887046.8A CN201810887046A CN110808809B CN 110808809 B CN110808809 B CN 110808809B CN 201810887046 A CN201810887046 A CN 201810887046A CN 110808809 B CN110808809 B CN 110808809B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0056—Inter-base station aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Abstract
The embodiment of the invention provides a signal transmission method and a device, wherein the method comprises the following steps: determining a transmission time of a first type of reference signal; according to the sending time of the reference signal of the first type, sending the reference signal of the first type, and/or receiving the reference signal of the first type; wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the sending time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the sending time of the first type of reference signal, or the communication device has no downlink transmission after the sending time of the first type of reference signal. In the embodiment of the invention, the communication equipment serving as the interference station can receive the interfered reference signal in the uplink time period of the original frame structure and can judge the number of the returned symbols.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a signal transmission method and device.
Background
Referring to fig. 1, in a Time Division Duplex (TDD) system networking, in order to avoid uplink and downlink interference between cells, the same uplink and downlink configuration situation is generally selected. And a Guard Period (GP) is set between downlink and uplink transmissions, which is generally N (e.g. less than <14) Orthogonal Frequency Division Multiplexing (OFDM) symbols. The length of the GP needs to be selected to ensure that downlink transmission from a base station within a certain range (e.g., -several tens of kilometers) does not interfere with uplink reception of the base station.
In general, the base station does not experience interference generated by downlink transmission of an external base station in tens or hundreds of kilometers in consideration of loss of electromagnetic waves propagating in space.
However, due to the influence of factors such as atmospheric refraction and propagation environment, downlink transmission of a remote base station within tens or hundreds of kilometers interferes with uplink reception of the base station, that is, a remote interference phenomenon. In the far-end interference phenomenon, the interference range can reach tens or hundreds of kilometers (for example, 300km, propagation delay of 1 millisecond (ms), which exceeds the GP of uplink and downlink switching), and the interference source is a downlink resource before the GP.
In the existing far-end Interference solution, after detecting far-end Interference, a Victim station (Victim site or Interfered site) sends an Interfered reference signal, and after receiving a corresponding reference signal, an Interfering station (Interfering site or aggregating site or Interfering site) executes an Interference backoff operation. However, considering that the frame structure configuration of the interfering station is different from that of the interfered station, if the interfered reference signal is still transmitted at the downlink time before the GP, the interfering station needs to receive the interfered reference signal at the downlink time, and the interfering station cannot listen to the interfered reference signal.
Therefore, a new signal transmission scheme is needed.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a signal transmission method and device, which solve the problem that an interfering station cannot detect an interfered reference signal.
In a first aspect, an embodiment of the present invention provides a signal transmission method, which is applied to a communication device, and the method includes:
determining a transmission time of a first type of reference signal;
according to the sending time of the reference signal of the first type, sending the reference signal of the first type, and/or receiving the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal.
The determining the transmission time of the first type of reference signal includes:
determining a transmission time of the first type of reference signal according to at least one of network configuration, operation, administration and maintenance, OAM, configuration and protocol conventions.
Optionally, the communication device is a victim station, and the victim station is in a far-end interference set, where the far-end interference set is configured by OAM, or the far-end interference set includes a victim station that detects far-end interference.
Optionally, the configuration of the downlink transmission includes at least one of: downlink transmission configured by a semi-static frame structure, downlink transmission configured by Radio Resource Control (RRC) and downlink transmission indicated by dynamic signaling.
Optionally, the type of downlink transmission includes at least one of: the method comprises the steps of transmission of reference signals, transmission of a Physical Downlink Control Channel (PDCCH), transmission of a Physical Downlink Shared Channel (PDSCH) and transmission of a Physical Broadcast Channel (PBCH).
Optionally, the communication device is an offender station, and the method further includes:
obtaining propagation delay according to the sending time of the reference signal of the first type and the receiving time of the reference signal of the first type;
and obtaining the number of the symbols of the interference backspacing according to the propagation delay.
In a second aspect, an embodiment of the present invention further provides a communication device, including: a transceiver and a processor;
the transceiver is configured to: determining a transmission time of a first type of reference signal;
the transceiver is further configured to: according to the sending time of the reference signal of the first type, sending the reference signal of the first type, and/or receiving the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal.
Optionally, the processor is further configured to: determining a transmission timing of the first type of reference signal according to at least one of network configuration, OAM configuration, and protocol agreement.
Optionally, the communication device is a victim station, and the victim station is in a far-end interference set, where the far-end interference set is configured by OAM, or the far-end interference set includes a victim station that detects far-end interference.
Optionally, the configuration of the downlink transmission includes at least one of: downlink transmission configured by a semi-static frame structure, downlink transmission configured by RRC and downlink transmission indicated by dynamic signaling.
Optionally, the type of downlink transmission includes at least one of: transmission of reference signals, PDCCH transmission, PDSCH transmission and PBCH transmission.
Optionally, the communication device is an offender station, and the processor is further configured to: obtaining propagation delay according to the sending time of the reference signal of the first type and the receiving time of the reference signal of the first type; and obtaining the number of the symbols of the interference backspacing according to the propagation delay.
In a third aspect, an embodiment of the present invention further provides a communication device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when executed by the processor, the computer program implements the steps of the signal transmission method described above.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the signal transmission method as described above.
In the embodiment of the present invention, the communication device serving as the interfering station may receive the interfered reference signal in the uplink time period of the original frame structure, and may determine the number of the symbols in the backoff.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a diagram illustrating remote interference;
FIG. 2 is a second schematic diagram of remote interference;
FIG. 3 is a third diagram illustrating remote interference;
FIG. 4 is a diagram of a semi-static frame structure;
FIG. 5 is a diagram of a dynamic frame structure;
FIG. 6 is a flowchart illustrating a signal transmission method according to an embodiment of the present invention;
FIG. 7 is a fourth diagram illustrating remote interference;
figure 8 is a fifth diagram illustrating remote interference;
FIG. 9 is a second flowchart of a signal transmission method according to an embodiment of the present invention;
FIG. 10 is a diagram illustrating signal transmission according to an embodiment of the present invention;
FIG. 11 is a second schematic diagram illustrating signal transmission according to an embodiment of the present invention;
fig. 12 is one of schematic diagrams of a communication device in an embodiment of the present invention;
fig. 13 is a second schematic diagram of a communication device in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems, such as Radio (New, NR) of the fifth generation mobile communication (5G), and so on.
It is understood that the embodiment of the present invention is described by taking the 5G NR system as an example, and is also applicable to other systems, which are not described herein. Among them, the 5G wireless network is also called the fifth generation mobile phone mobile communication standard, and is an extension after 4G. The 5G wireless network can utilize high carrier frequency and the number of antennas which are not available before, thereby greatly increasing the transmission speed of signaling. Furthermore, the 5G may also incorporate any potential new 5G air interface, LTE and WiFi, thereby enabling a universal high coverage and seamless user experience.
The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.
Referring to fig. 2 and 3, a remote interference management process is shown, which comprises the following basic processes:
step 201: the interfered station judges whether remote interference exists or not;
wherein, the interfered station can also be called as the interfered base station.
Step 202: after detecting the far-end interference, the interfered station sends an interfered signal; the interfered signal indicates: the victim station is subject to far-end interference;
step 203: the interfered station continuously judges whether the far-end interference is detected; if the victim station detects far-end interference, execute step 202; if the victim station does not detect the far-end interference, executing step 204;
step 204: the interfered station stops sending the interfered signal;
step 205: the interference applying station judges whether the interfered signal is sensed or not;
the scrambling station may also be referred to as a scrambling base station.
Step 206: the interference station detects the interfered signal and executes interference back-off.
In step 206, the interference back-off refers to sacrificing the downlink transmission resource before GP. It can be understood that the GP time is extended (i.e. part of the downlink resources before the GP of the interfering station is discarded), so as to avoid the interference of the remote base station.
In the above-mentioned remote interference management procedure, a unified frame structure design is assumed, and a Reference Signal (RS) is placed before GP for transmission at the downlink time, however, this approach does not consider the influence of the flexible frame structure on the transmission position of the interfered Reference Signal.
Among NR, there are two types of semi-static frame structures and dynamic frame structures:
(1) in the semi-static frame structure, the first X time slots are downlink, the last Y time slots are uplink, and the middle X time slots are flexible time slots, as shown in fig. 4.
(2) Dynamic frame structure, see fig. 5, is more flexible.
Referring to table 1, there are also different frame structure designs in Time Division Long Term Evolution (TD-LTE).
Table 1 Uplink-downlink configurations (Uplink-downlink configurations)
Considering that the frame structure configurations of the interfering station and the interfered station are different, if the interfered signal is still sent at the downlink time before the GP, the interfering station may need to receive the interfered signal at the downlink time, and/or the interfering station may not determine the uplink symbol length of the interfered signal.
Referring to fig. 6, an execution subject of the method may be a communication device serving as an offender station and/or a victim station, where the communication device may be a 4G LTE base station, a 5G NR base station, or a network device of another communication system, and the method includes the following specific steps:
step 601: determining a transmission time of a first type of reference signal;
in the embodiment of the present invention, the first type of reference signal may be referred to as an interfered signal or an interfered reference signal. Optionally, the first type of reference signal may trigger other network devices to perform an interference back-off operation.
In this embodiment of the present invention, optionally, in step 601, a transmission time of the first type of reference signal may be determined according to at least one of a network configuration, an Operation Administration and Maintenance (OAM) configuration, and a protocol agreement. For example: the transmission instants of the first type of reference signals may be predefined in a network configuration, an operation administration maintenance configuration or a protocol agreement.
Step 602: according to the sending time of the reference signal of the first type, sending the reference signal of the first type, and/or receiving the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal.
For example: the downlink transmission of the interfering station cannot exceed the sending time t (absolute time) of the first type of reference signal of the interfered station, that is, all base stations in the far-end interference set know the sending time t of the first type of reference signal, and then in the uplink and downlink switching period for sending the first type of reference signal, it is determined that the downlink transmission of the base station cannot exceed the time t.
In this embodiment of the present invention, the configuration of the downlink transmission includes at least one of the following: downlink transmission configured by a semi-static frame structure, downlink transmission configured by Radio Resource Control (RRC), and downlink transmission indicated by dynamic signaling. The dynamic signaling may be Downlink Control Information (DCI), but is not limited thereto.
In this embodiment of the present invention, the type of downlink transmission includes at least one of the following: the transmission of a reference signal, a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH), and a Physical Broadcast Channel (PBCH).
The transmission of the Reference Signal may be transmission of a Channel State Information-Reference Signal (CSI-RS), a second type of Reference Signal, and the like, where the second type of Reference Signal is used to indicate whether the atmospheric waveguide phenomenon disappears.
It should be noted that, when the communication device is a victim station, the victim station is in a far-end interference set, where the far-end interference set is configured by OAM, or the far-end interference set includes a victim station that detects far-end interference.
In the embodiment of the present invention, the communication device serving as the interfering station may receive the interfered reference signal in the uplink time period of the original frame structure, and may determine the number of the symbols in the backoff.
Referring to fig. 7 and 8, the uplink and downlink configuration differs between the victim station and the aggressor station. The victim station sends a reference signal at a downlink time t1 before GP, after spatial propagation, the time when the victim station 1 arrives at the aggressor station is t2, and t2 is in the downlink transmission time period of the aggressor station 1, so the aggressor station 1 may not be able to sense the reference signal, or needs to switch to an uplink receiving behavior in the downlink transmission time period in order to sense the reference signal.
In addition, since the uplink and downlink frame structure configuration is different from that of the victim station, the perturbation station 2 defaults to estimate the propagation distance by taking the downlink time t3 before its GP as the reference time, and calculates the downlink time length required to be backed off. However, the real propagation time of the victim station and the offender station 2 is t 3-t 1, and the operation of the backoff will be wrong.
Referring to fig. 9, an execution subject of the method may be a communication device serving as an interfering station, where the communication device may be a 4G LTE base station, a 5G NR base station, or a network device of another communication system, and the method includes the following specific steps:
step 901: determining the sending time of a first type of reference signal of a victim station;
in the embodiment of the present invention, the first type of reference signal may be referred to as an interfered signal or an interfered reference signal. Optionally, the first type of reference signal may trigger other network devices to perform an interference back-off operation.
In this embodiment of the present invention, optionally, in step 901, the transmission time of the first type of reference signal may be determined according to at least one of a network configuration, an OAM configuration, and a protocol agreement. For example: the transmission instants of the first type of reference signals may be predefined in a network configuration, an operation administration maintenance configuration or a protocol agreement.
Step 902: receiving the reference signal of the first type according to the sending time of the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal.
In this embodiment of the present invention, the configuration of the downlink transmission includes at least one of the following: downlink transmission configured by a semi-static frame structure, downlink transmission configured by RRC and downlink transmission indicated by dynamic signaling. The dynamic signaling may be DCI, but is not limited thereto.
In this embodiment of the present invention, the type of downlink transmission includes at least one of the following: transmission of reference signals, PDCCH transmission, PDSCH transmission and PBCH transmission. Wherein, the transmission of the reference signal may be transmission of a CSI-RS, a second type of reference signal, and the like.
Step 903: obtaining propagation delay according to the sending time of the reference signal of the first type and the receiving time of the reference signal of the first type;
in the embodiment of the present invention, the propagation delay refers to a time taken for an electromagnetic signal or an optical signal to propagate a certain distance in a transmission medium, that is, a total elapsed time from when a transmitting end transmits data to when a receiving end receives the data (or from when the receiving end transmits an acknowledgement frame to when the transmitting end receives the acknowledgement frame).
Step 904: and obtaining the number of the symbols of the interference backspacing according to the propagation delay.
For example: referring to fig. 10, the transmission time t of the interfered signal is agreed between the base stations to be the time before GP of the interfering station 1, and then the interfered station needs to transmit the interfered signal at time t. Because a certain protection time is needed between downlink transmission and uplink reception, the victim station adjusts its uplink and downlink configuration in order to avoid adding an uplink and downlink switching point.
Referring to fig. 11, it is agreed that the sending time t of the interfered signal between the base stations is the time before GP of the interfered station 1, and then the interfering station 1 needs to modify the uplink and downlink configuration in order to sense the interfered signal in the uplink receiving time period.
In the embodiment of the present invention, the communication device serving as the interfering station may receive the interfered reference signal in the uplink time period of the original frame structure, and may determine the number of the symbols in the backoff.
In order to solve the problem of far-end interference, the embodiment of the present invention further provides a communication device, and since the principle of solving the problem of the communication device is similar to the signal transmission method in the embodiment of the present invention, the implementation of the communication device may refer to the implementation of the method, and the repeated parts are not described again.
Referring to fig. 12, an embodiment of the present invention further provides a communication device, where the communication device includes: a transceiver 1201 and a processor 1202;
the processor 1202 is configured to: determining a transmission time of a first type of reference signal;
the transceiver 1201 is configured to: according to the sending time of the reference signal of the first type, sending the reference signal of the first type, and/or receiving the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal.
Optionally, the processor 1202 is further configured to: determining a transmission timing of the first type of reference signal according to at least one of network configuration, OAM configuration, and protocol agreement.
Optionally, the communication device is a victim station, and the victim station is in a far-end interference set, where the far-end interference set is configured by OAM, or the far-end interference set includes a victim station that detects far-end interference.
Optionally, the configuration of the downlink transmission includes at least one of: downlink transmission configured by a semi-static frame structure, downlink transmission configured by RRC and downlink transmission indicated by dynamic signaling.
Optionally, the type of downlink transmission includes at least one of: transmission of reference signals, PDCCH transmission, PDSCH transmission and PBCH transmission.
Optionally, the communication device is an offender station, and the processor 1202 is further configured to: obtaining propagation delay according to the sending time of the reference signal of the first type and the receiving time of the reference signal of the first type; and obtaining the number of the symbols of the interference backspacing according to the propagation delay.
The mobile terminal provided in the embodiment of the present invention can implement each process in the method embodiments of fig. 6 and fig. 9, and is not described here again to avoid repetition.
In the embodiment of the present invention, the communication device serving as the interfering station may receive the interfered reference signal in the uplink time period of the original frame structure, and may determine the number of the symbols in the backoff.
In order to solve the problem of far-end interference, the embodiment of the present invention further provides a communication device, and since the principle of solving the problem of the communication device is similar to the signal transmission method in the embodiment of the present invention, the implementation of the communication device may refer to the implementation of the method, and the repeated parts are not described again.
Referring to fig. 13, another communication device 1300 is provided in an embodiment of the present invention, including: a processor 1301, a transceiver 1302, a memory 1303 and a bus interface.
Among other things, processor 1301 may be responsible for managing the bus architecture and general processing. The memory 1303 may store data used by the processor 1301 in performing operations.
In this embodiment of the present invention, the communication device 1300 may further include: a computer program stored on the memory 1303 and executable on the processor 1301, which when executed by the processor 1301, performs the steps in the methods described above.
In fig. 13, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1301 and various circuits of memory represented by memory 1303 linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. The bus interface provides an interface. The transceiver 1302 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (10)
1. A signal transmission method applied to a communication device, the method comprising:
determining a transmission time of a first type of reference signal;
receiving the reference signal of the first type according to the sending time of the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal;
the communication equipment is an interference station and obtains propagation delay according to the sending time of the reference signal of the first type and the receiving time of the reference signal of the first type; receiving an interfered reference signal in an uplink time period of an original frame structure; and obtaining the number of the symbols of the interference backspacing according to the propagation delay.
2. The method of claim 1, wherein determining the transmission time of the first type of reference signal comprises:
determining a transmission time of the first type of reference signal according to at least one of network configuration, operation, administration and maintenance, OAM, configuration and protocol conventions.
3. The method of claim 1, wherein the configuration of the downlink transmission comprises at least one of: downlink transmission configured by a semi-static frame structure, downlink transmission configured by Radio Resource Control (RRC) and downlink transmission indicated by dynamic signaling.
4. The method of claim 1, wherein the type of downlink transmission comprises at least one of: the method comprises the steps of transmission of reference signals, transmission of a Physical Downlink Control Channel (PDCCH), transmission of a Physical Downlink Shared Channel (PDSCH) and transmission of a Physical Broadcast Channel (PBCH).
5. A communication device, comprising: a transceiver and a processor;
the processor is configured to: determining a transmission time of a first type of reference signal;
the transceiver is configured to: receiving the reference signal of the first type according to the sending time of the reference signal of the first type;
wherein, in one uplink-downlink switching period, the downlink transmission of the communication device is before the transmission time of the first type of reference signal, or the downlink transmission of the communication device cannot exceed the transmission time of the first type of reference signal, or the communication device has no downlink transmission after the transmission time of the first type of reference signal;
the communication device is an offender station, the processor being further configured to: obtaining propagation delay according to the sending time of the reference signal of the first type and the receiving time of the reference signal of the first type; receiving an interfered reference signal in an uplink time period of an original frame structure; and obtaining the number of the symbols of the interference backspacing according to the propagation delay.
6. The communications device of claim 5, wherein the processor is further configured to: determining a transmission timing of the first type of reference signal according to at least one of network configuration, OAM configuration, and protocol agreement.
7. The communications device of claim 5, wherein the configuration of the downlink transmission comprises at least one of: downlink transmission configured by a semi-static frame structure, downlink transmission configured by RRC and downlink transmission indicated by dynamic signaling.
8. The communications device of claim 5, wherein the type of downlink transmission comprises at least one of: transmission of reference signals, PDCCH transmission, PDSCH transmission and PBCH transmission.
9. A communication device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the signal transmission method as claimed in any one of claims 1 to 4.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the signal transmission method according to any one of claims 1 to 4.
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| WO2006021145A1 (en) * | 2004-08-23 | 2006-03-02 | Datang Mobile Communications Equipment Co., Ltd | Downlink pilot channel interfere eliminating method |
| CN106533455A (en) * | 2016-09-20 | 2017-03-22 | 惠州Tcl移动通信有限公司 | Antenna switching system and switching method |
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| US20050111405A1 (en) * | 2003-11-25 | 2005-05-26 | Emmanuel Kanterakis | Interference cancellation method and apparatus |
| CN104519501B (en) * | 2013-09-27 | 2018-05-11 | 鼎桥通信技术有限公司 | A kind of co-channel interference detection method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006021145A1 (en) * | 2004-08-23 | 2006-03-02 | Datang Mobile Communications Equipment Co., Ltd | Downlink pilot channel interfere eliminating method |
| CN106533455A (en) * | 2016-09-20 | 2017-03-22 | 惠州Tcl移动通信有限公司 | Antenna switching system and switching method |
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