CN111835442A - Interference measurement method and corresponding equipment - Google Patents

Interference measurement method and corresponding equipment Download PDF

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Publication number
CN111835442A
CN111835442A CN201910311687.3A CN201910311687A CN111835442A CN 111835442 A CN111835442 A CN 111835442A CN 201910311687 A CN201910311687 A CN 201910311687A CN 111835442 A CN111835442 A CN 111835442A
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CN
China
Prior art keywords
downlink reference
interference
reference signal
category
user equipment
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Pending
Application number
CN201910311687.3A
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Chinese (zh)
Inventor
张闯
钱辰
苏笛
林鹏
喻斌
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Beijing Samsung Telecom R&D Center
Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
Original Assignee
Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Publication date
Application filed by Beijing Samsung Telecommunications Technology Research Co Ltd, Samsung Electronics Co Ltd filed Critical Beijing Samsung Telecommunications Technology Research Co Ltd
Priority to CN201910311687.3A priority Critical patent/CN111835442A/en
Priority to EP20790608.2A priority patent/EP3931989A4/en
Priority to PCT/KR2020/005220 priority patent/WO2020214007A1/en
Priority to US17/604,234 priority patent/US20220216976A1/en
Publication of CN111835442A publication Critical patent/CN111835442A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • 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
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • 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
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Abstract

An interference measurement method and corresponding apparatus are provided. The interference measurement method comprises the following steps: receiving a downlink reference signal from a base station; acquiring interference strength information of co-channel interference or self-interference of user equipment performing uplink transmission on a time-frequency resource where a received first type downlink reference signal is located to the current user equipment, or acquiring the information of the co-channel interference or the self-interference by a base station based on the received first type downlink reference signal; reporting the acquired interference strength information or information used for the base station to acquire the interference strength information to the base station, wherein the downlink reference signals of the first category are: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists. According to the interference measurement method and the corresponding equipment, the interference intensity of co-channel interference among user equipment or self-interference of the user equipment can be accurately measured.

Description

Interference measurement method and corresponding equipment
Technical Field
The present invention relates generally to the field of wireless communication technologies, and in particular, to an interference measurement method and apparatus for a user equipment, and an interference measurement method and apparatus for a base station.
Background
The rapid growth of mobile data services, especially high definition video and ultra high definition video services, puts higher demands on the transmission rate of wireless communication. To meet the ever-increasing demand for mobile data services, new techniques are needed to further increase the throughput of wireless communication systems. The full-duplex technology can further improve the frequency spectrum utilization rate, and unlike the traditional half-duplex wireless communication system which adopts time domain orthogonal division (time division duplex, TDD) or frequency domain orthogonal division (frequency division duplex, FDD) in uplink and downlink, the full-duplex wireless communication system allows uplink and downlink of the user equipment to transmit simultaneously on the same time frequency resource, so the full-duplex wireless communication system can theoretically reach twice the transmission rate of the half-duplex wireless communication system.
However, the application of full duplex technology needs to overcome two major problems: firstly, self-interference, namely interference of sending of user equipment to receiving; and secondly, co-channel interference among user equipment in the same cell, namely the interference of uplink user equipment to downlink user equipment using the same time-frequency resource. For self-interference, there are several techniques that can achieve better self-interference cancellation performance. For co-channel interference among user equipments in a cell, currently, the interference of uplink-transmitted user equipments to downlink-received user equipments using the same time-frequency resource is mainly reduced by scheduling.
In order to perform effective scheduling of the ue, the base station needs to obtain the interference strength information of the co-channel interference between the ues. The currently adopted method for acquiring the interference strength information of the co-channel interference between the user equipments is as follows: the base station estimates the interference strength of co-channel interference between the user equipments by acquiring the position information of the user equipments, and specifically, the interference strength of co-channel interference between the user equipments which are farther away is smaller, and the interference strength of co-channel interference between the user equipments which are closer to each other is larger, so that the base station selects a pair of user equipments which are farther away to schedule uplink and downlink transmission respectively when the base station schedules the user equipments on the same time-frequency resource.
The scheduling method based on the location information of the ue may reduce co-channel interference between ues to some extent, however, since the location information of the ue is estimated to be inaccurate (e.g., the accuracy of a Positioning method based on a Reference Signal Time Difference (RSTD) is about ten meters, and the accuracy of a Positioning method based on a Global Positioning System (GPS) is about several meters), the interference strength of the co-channel interference between the ues estimated based on the location information is inaccurate, and thus the scheduling performance is greatly affected. Therefore, a method for accurately measuring the interference strength of the co-channel interference between the user equipments is needed.
Disclosure of Invention
An exemplary embodiment of the present invention is to provide an interference measurement method and apparatus for a user equipment, and an interference measurement method and apparatus for a base station, which can accurately measure interference strength of co-channel interference between user equipments or self-interference of the user equipments.
According to an exemplary embodiment of the present invention, there is provided an interference measurement method for a user equipment, wherein the interference measurement method includes: receiving a downlink reference signal from a base station; acquiring interference strength information of co-channel interference or self-interference of user equipment performing uplink transmission on a time-frequency resource where a received first type downlink reference signal is located to the current user equipment, or acquiring the information of the co-channel interference or the self-interference by a base station based on the received first type downlink reference signal; reporting the acquired interference strength information or information used for the base station to acquire the interference strength information to the base station, wherein the downlink reference signals of the first category are: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists.
Optionally, the step of obtaining the interference strength information based on the received downlink reference signal of the first category includes: subtracting the estimated first class of downlink reference signal portion from the received signal and determining the interference strength information based on the remaining signal portion; or, determining the interference strength information based on a channel measurement obtained for the received downlink reference signal of the first category; or, acquiring the interference strength information based on the received first category downlink reference signal and a second category downlink reference signal, where the second category downlink reference signal is: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
Optionally, the step of determining the interference strength information based on the remaining signal portion comprises: and using the average power value of the symbols corresponding to the remaining signal portions or the quantization level of the average power value as the interference strength information, wherein the downlink reference signal portion of the first category in the received signal is estimated by: estimating a downlink channel based on the received downlink reference signal of the first category, and reconstructing a downlink reference signal part of the first category in the received signal based on the estimated parameters of the downlink channel.
Optionally, the step of determining the interference strength information based on channel measurements obtained for the received downlink reference signals of the first category includes: and taking the ratio between the reference signal received power of the received first-class downlink reference signal and the signal-to-interference-and-noise ratio or the quantization level of the ratio as the interference strength information.
Optionally, the step of obtaining the interference strength information based on the received first category downlink reference signals and second category downlink reference signals includes: taking a difference value between the average power value of the symbol corresponding to the received first-class downlink reference signal and the average power value of the symbol corresponding to the received second-class downlink reference signal or a quantization level of the difference value as the interference strength information; or, taking a difference value between a channel measurement value obtained for the received downlink reference signal of the second category and a channel measurement value obtained for the received downlink reference signal of the first category or a quantization level of the difference value as the interference strength information, where the channel measurement value is: reference signal received quality or signal to interference plus noise ratio.
Optionally, the information for the base station to obtain the interference strength information includes: channel measurement quantity is obtained according to the received downlink reference signals of the first category; or, a channel measurement obtained for the received downlink reference signal of the first category and a channel measurement obtained for the received downlink reference signal of the second category; or, the average power value of the received symbol corresponding to the first category of downlink reference signals and the average power value of the received symbol corresponding to the second category of downlink reference signals, where the channel measurement quantity includes at least one of: reference signal received quality, signal to interference plus noise ratio, reference signal received power.
Optionally, the interference measurement method further includes: determining whether the received downlink reference signal is a first type downlink reference signal or a second type downlink reference signal, wherein the second type downlink reference signal is: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
Optionally, the step of determining whether the received downlink reference signal is a downlink reference signal of a first category or a downlink reference signal of a second category includes: determining whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal based on information received from a base station indicating a configuration mode of the downlink reference signal, a duration of the configuration mode, and a starting position of the configuration mode; or determining whether the received downlink reference signal is a first category downlink reference signal or a second category downlink reference signal based on at least one of a frequency domain offset position, a spreading code, a scrambling code, and a reference signal type of the received downlink reference signal; or determining whether the received downlink reference signal is a first type downlink reference signal or a second type downlink reference signal based on the type of the measurement quantity required to be reported by the received downlink reference signal, wherein the configuration mode of the downlink reference signal defines the number and the sequence of the first type downlink reference signal and the second type downlink reference signal in each period.
Optionally, the step of reporting the acquired interference strength information or information used for the base station to acquire the interference strength information to the base station includes: and reporting the acquired interference strength information or the information used for the base station to acquire the interference strength information to the base station according to a specific mode so that the base station can determine the received interference strength information or the first type downlink reference signal corresponding to the information used for the base station to acquire the interference strength information.
Optionally, the step of acquiring the interference strength information or the information for the base station to acquire the interference strength information includes: and acquiring the interference strength information or the information for the base station to acquire the interference strength information based on the received multiple first-class downlink reference signals, wherein the user equipment performing uplink transmission on the time-frequency resources where the multiple first-class downlink reference signals are located is the same.
According to another exemplary embodiment of the present invention, there is provided an interference measurement method for a base station, wherein the interference measurement method includes: sending a first type of downlink reference signal to at least one user equipment, wherein the first type of downlink reference signal is: a downlink reference signal of scheduled uplink transmission exists on the time frequency resource; receiving, from the at least one user equipment, interference strength information reported for the downlink reference signal of the first category; or, acquiring interference strength information based on information, reported by the at least one user equipment for the first category of downlink reference signals, used for a base station to acquire the interference strength information; the received or acquired interference strength information is taken as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
Optionally, the interference measurement method further includes: and scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference strength information of the user equipment on the co-channel interference of other user equipment and/or self-interference of the user equipment.
Optionally, the interference measurement method further includes: sending a downlink reference signal of a second category to the at least one user equipment, wherein the downlink reference signal of the second category is: there is no downlink reference signal of scheduled uplink transmission on the time frequency resource, wherein the step of obtaining the interference strength information comprises: the interference strength information is obtained based on information, which is reported by the at least one user equipment respectively for the first category of downlink reference signals and the second category of downlink reference signals and is used for a base station to obtain the interference strength information, or the received interference strength information is obtained by the at least one user equipment based on the first category of downlink reference signals and the second category of downlink reference signals.
Optionally, the step of acquiring the interference strength information includes: regarding each of the at least one ue, respectively, using a difference value between the channel measurement quantity reported by each ue for the downlink reference signal of the second category and the channel measurement quantity reported for the downlink reference signal of the first category, or a quantization level of the difference value, as the interference strength information, where the channel measurement quantity is: reference signal received quality or signal to interference plus noise ratio; or, regarding each of the at least one ue, respectively, using, as the interference strength information, a difference value between an average power value of a symbol corresponding to the downlink reference signal reported by each ue for the first category of downlink reference signals and an average power value of a symbol corresponding to the downlink reference signal reported for the second category of downlink reference signals, or a quantization level of the difference value.
Optionally, the information for the base station to obtain the interference strength information includes: channel measurements obtained for the downlink reference signals of the first category.
Optionally, the step of acquiring the interference strength information includes: and regarding each user equipment in the at least one user equipment, respectively, using a ratio between reference signal received power and signal-to-interference-and-noise ratio reported by each user equipment for the downlink reference signal of the first category or a quantization level of the ratio as the interference strength information.
Optionally, the interference measurement method further includes: and identifying the received interference strength information or the first type downlink reference signal corresponding to the information for the base station to acquire the interference strength information.
Optionally, the step of scheduling uplink and downlink transmissions of the user equipment on the same time-frequency resource includes: when determining that uplink transmission of one user equipment is scheduled on a time-frequency resource, scheduling downlink transmission of at least one user equipment which is subjected to co-channel interference or self-interference of the user equipment and meets a first preset condition on the time-frequency resource; or when determining that downlink transmission of one user equipment is scheduled on a time-frequency resource, scheduling uplink transmission of at least one user equipment on the time-frequency resource, wherein the interference intensity information of co-channel interference or self-interference to the user equipment meets a second preset condition; or, scheduling uplink and downlink transmission of a pair of user equipments or a single user equipment on the same time-frequency resource, wherein interference strength information of co-channel interference of one user equipment to another user equipment or self-interference of the single user equipment in the pair of user equipments meets a third preset condition.
Optionally, the step of transmitting the downlink reference signals of the first category and the downlink reference signals of the second category to at least one user equipment includes: sending a first type of downlink reference signals and a second type of downlink reference signals to the at least one user equipment according to a specific configuration mode of the downlink reference signals, and sending information for indicating the specific configuration mode, the duration of the specific configuration mode, and the starting position of the specific configuration mode to the at least one user equipment, wherein the configuration mode of the downlink reference signals defines the number and the sequence of the first type of downlink reference signals and the second type of downlink reference signals in each period; and/or the step of sending the first category downlink reference signals and the second category downlink reference signals to at least one user equipment comprises: sending a first type of downlink reference signal to the at least one user equipment according to the first frequency domain offset position, and sending a second type of downlink reference signal to the at least one user equipment according to the second frequency domain offset position; and/or the step of sending the first category downlink reference signals and the second category downlink reference signals to at least one user equipment comprises: transmitting a first category of downlink reference signals to the at least one user equipment using a first spreading code or a first scrambling code, and transmitting a second category of downlink reference signals to the at least one user equipment using a second spreading code or a second scrambling code; and/or the first type of downlink reference signal is a first reference signal type of downlink reference signal, and the second type of downlink reference signal is a second reference signal type of downlink reference signal; and/or informing the at least one user equipment of the uplink channel measurement only for downlink reference signals of the second class.
Optionally, the step of transmitting the downlink reference signal of the first category to the at least one user equipment includes: sending a plurality of first categories of downlink reference signals to the at least one user equipment, wherein the user equipments performing uplink transmission on the time-frequency resources where the plurality of first categories of downlink reference signals are located are the same, and the step of obtaining the interference strength information includes: the interference strength information is obtained based on information, reported by the at least one user equipment for the plurality of first categories of downlink reference signals, used for the base station to obtain the interference strength information, or the received interference strength information is obtained by the at least one user equipment based on the plurality of first categories of downlink reference signals.
According to another exemplary embodiment of the present invention, there is provided a user equipment, wherein the user equipment includes: a receiving unit, configured to receive a downlink reference signal from a base station; a processing unit, configured to obtain, based on a received first category downlink reference signal, interference strength information of co-channel interference or self-interference of a user equipment performing uplink transmission on a time-frequency resource where the received first category downlink reference signal is located to a current user equipment, or obtain, by a base station, information of the interference strength information of the co-channel interference or the self-interference; a sending unit, configured to report the obtained interference strength information or information used for the base station to obtain the interference strength information to the base station, where the downlink reference signal of the first category is: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists.
Optionally, the processing unit subtracts the estimated downlink reference signal part of the first class from the received signal, and determines the interference strength information based on the remaining signal part; or, the processing unit determines the interference strength information based on a channel measurement quantity obtained for the received downlink reference signal of the first category; or, the processing unit obtains the interference strength information based on the received first category downlink reference signal and a second category downlink reference signal, where the second category downlink reference signal is: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
Optionally, the processing unit uses an average power value of symbols corresponding to the remaining signal portions or a quantization level of the average power value as the interference strength information, wherein the obtaining unit estimates the downlink reference signal portion of the first category in the received signal by: estimating a downlink channel based on the received downlink reference signal of the first category, and reconstructing a downlink reference signal part of the first category in the received signal based on the estimated parameters of the downlink channel.
Optionally, the processing unit uses a ratio between reference signal received power and signal-to-interference-and-noise ratio of the received downlink reference signal of the first category or a quantization level of the ratio as the interference strength information.
Optionally, the processing unit uses, as the interference strength information, a difference value between an average power value of a symbol corresponding to the received first category of downlink reference signals and an average power value of a symbol corresponding to the received second category of downlink reference signals, or a quantization level of the difference value; or, the processing unit uses, as the interference strength information, a difference value between a channel measurement value obtained for the received downlink reference signal of the second category and a channel measurement value obtained for the received downlink reference signal of the first category, or a quantization level of the difference value, where the channel measurement value is: reference signal received quality or signal to interference plus noise ratio.
Optionally, the information for the base station to obtain the interference strength information includes: channel measurement quantity is obtained according to the received downlink reference signals of the first category; or, a channel measurement obtained for the received downlink reference signal of the first category and a channel measurement obtained for the received downlink reference signal of the second category; or, the average power value of the received symbol corresponding to the first category of downlink reference signals and the average power value of the received symbol corresponding to the second category of downlink reference signals, where the channel measurement quantity includes at least one of: reference signal received quality, signal to interference plus noise ratio, reference signal received power.
Optionally, the user equipment further includes: a determining unit, configured to determine whether a received downlink reference signal is a first category downlink reference signal or a second category downlink reference signal, where the second category downlink reference signal is: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
Optionally, the determining unit determines whether the received downlink reference signal is a downlink reference signal of a first category or a downlink reference signal of a second category based on information received from the base station and indicating a configuration mode of the downlink reference signal, a duration of the configuration mode, and a starting position of the configuration mode; or, the determining unit determines whether the received downlink reference signal is a first category downlink reference signal or a second category downlink reference signal based on at least one of a frequency domain offset position, a spreading code, a scrambling code, and a reference signal type of the received downlink reference signal; or, the determining unit determines whether the received downlink reference signal is a first type downlink reference signal or a second type downlink reference signal based on the type of the measurement quantity required to be reported by the received downlink reference signal, wherein the configuration mode of the downlink reference signal defines the number and the order of the first type downlink reference signal and the second type downlink reference signal in each period.
Optionally, the sending unit reports the acquired interference strength information or information used by the base station to the base station in a specific manner, so that the base station can determine the first category of downlink reference signals corresponding to the received interference strength information or information used by the base station to acquire the interference strength information.
Optionally, the processing unit obtains the interference strength information or the information for the base station to obtain the interference strength information based on a plurality of received first-class downlink reference signals, where user equipments performing uplink transmission on time-frequency resources where the plurality of first-class downlink reference signals are located are the same.
According to another exemplary embodiment of the present invention, there is provided a base station, wherein the base station includes: a sending unit, configured to send a first category of downlink reference signals to at least one user equipment, where the first category of downlink reference signals is: a downlink reference signal of scheduled uplink transmission exists on the time frequency resource; a receiving unit, configured to receive, from the at least one ue, interference strength information reported for the first category of downlink reference signals or information used for a base station to obtain the interference strength information; a processing unit, configured to, when receiving information for a base station to obtain interference strength information, obtain the interference strength information based on information, reported by the at least one ue for the first category of downlink reference signals, for the base station to obtain the interference strength information; and for using the received or acquired interference strength information as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
Optionally, the base station further includes: and the scheduling unit is used for scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference intensity information of the same-channel interference and/or self-interference of the user equipment to other user equipment.
Optionally, the sending unit further sends a downlink reference signal of a second category to the at least one user equipment, where the downlink reference signal of the second category is: the processing unit obtains the interference strength information based on information, which is reported by the at least one user equipment for the first category of downlink reference signals and the second category of downlink reference signals respectively and is used for a base station to obtain the interference strength information, or the received interference strength information is obtained by the at least one user equipment based on the first category of downlink reference signals and the second category of downlink reference signals.
Optionally, the processing unit is configured to, for each of the at least one ue, respectively use, as the interference strength information, a difference value between a channel measurement quantity reported by each ue for the downlink reference signal of the second category and a channel measurement quantity reported for the downlink reference signal of the first category, or a quantization level of the difference value, where the channel measurement quantity is: reference signal received quality or signal to interference plus noise ratio; or, the processing unit uses, as the interference strength information, a difference value between an average power value of a symbol corresponding to the downlink reference signal reported by each ue for the first category of downlink reference signals and an average power value of a symbol corresponding to the downlink reference signal reported for the second category of downlink reference signals, or a quantization level of the difference value, for each of the at least one ue.
Optionally, the information for the base station to obtain the interference strength information includes: channel measurements obtained for the downlink reference signals of the first category.
Optionally, the processing unit is configured to, for each of the at least one ue, use, as the interference strength information, a ratio between reference signal received power and signal-to-interference-and-noise ratio reported by each ue for the first type of downlink reference signal or a quantization level of the ratio.
Optionally, the base station further includes: and the identification unit is used for identifying the received interference strength information or the first type downlink reference signals corresponding to the information used for the base station to acquire the interference strength information.
Optionally, when determining that uplink transmission of one user equipment is scheduled on a time-frequency resource, the scheduling unit schedules downlink transmission of at least one user equipment on the time-frequency resource, where interference strength information of co-channel interference or self-interference of the one user equipment meets a first preset condition; or when determining that downlink transmission of one user equipment is scheduled on a time-frequency resource, the scheduling unit schedules uplink transmission of at least one user equipment on the time-frequency resource, wherein the interference strength information of co-channel interference or self-interference to the user equipment meets a second preset condition; or, the scheduling unit schedules uplink and downlink transmission of a pair of user equipments or a single user equipment on the same time-frequency resource, where interference strength information of co-channel interference of one user equipment to another user equipment or self-interference of the single user equipment in the pair of user equipments meets a third preset condition.
Optionally, the sending unit sends, to the at least one ue, a first type of downlink reference signal and a second type of downlink reference signal according to a specific configuration mode of the downlink reference signal, and sends, to the at least one ue, information indicating the specific configuration mode, a duration of the specific configuration mode, and a starting position of the specific configuration mode, where the configuration mode of the downlink reference signal defines the number and order of the first type of downlink reference signal and the second type of downlink reference signal in each period; and/or the sending unit sends the first type of downlink reference signals to the at least one user equipment according to the first frequency domain offset position, and sends the second type of downlink reference signals to the at least one user equipment according to the second frequency domain offset position; and/or the sending unit sends the downlink reference signal of the first category to the at least one user equipment by using the first spreading code or the first scrambling code, and sends the downlink reference signal of the second category to the at least one user equipment by using the second spreading code or the second scrambling code; and/or the first type of downlink reference signal is a first reference signal type of downlink reference signal, and the second type of downlink reference signal is a second reference signal type of downlink reference signal; and/or the sending unit informs the at least one user equipment of the uplink channel measurement only for the downlink reference signals of the second category.
Optionally, the sending unit sends a plurality of first categories of downlink reference signals to the at least one ue, where the ue performing uplink transmission on the time-frequency resources where the plurality of first categories of downlink reference signals are located is the same, and the processing unit obtains the interference strength information based on information, which is reported by the at least one ue for the plurality of first categories of downlink reference signals and is used for the base station to obtain the interference strength information, or the received interference strength information is obtained by the at least one ue based on the plurality of first categories of downlink reference signals.
According to another exemplary embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, implements the interference measurement method for a user equipment as described above.
According to another exemplary embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, implements the interference measurement method for a base station as described above.
According to another exemplary embodiment of the present invention, there is provided a user equipment, wherein the user equipment includes: a processor; a memory storing a computer program which, when executed by the processor, implements the interference measurement method for the user equipment as described above.
According to another exemplary embodiment of the present invention, there is provided a base station, wherein the base station includes: a processor; a memory storing a computer program which, when executed by the processor, implements the interference measurement method for a base station as described above.
According to the interference measurement method and device for the user equipment and the interference measurement method and device for the base station in the exemplary embodiments of the present invention, the interference strength information of the co-channel interference between the user equipments in the cell or the self-interference of the user equipments can be obtained, so that the base station can more accurately schedule the user equipments based on the interference strength information to make the interference of the uplink transmission on the same time-frequency resource to the downlink transmission smaller, and the transmission rate and throughput of the wireless communication system are improved.
Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
Drawings
The above and other objects and features of exemplary embodiments of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate exemplary embodiments, wherein:
fig. 1 illustrates a flowchart of an interference measurement method for a user equipment according to an exemplary embodiment of the present invention;
fig. 2 illustrates a flowchart of an interference measurement method for a base station according to an exemplary embodiment of the present invention;
fig. 3 shows a flowchart of an interference measurement method for a user equipment according to a first embodiment of the present invention;
fig. 4 illustrates an example of co-channel interference measurement based on a first class of downlink reference signals according to an exemplary embodiment of the present invention;
fig. 5 is a flowchart illustrating an interference measurement method for a base station according to a first embodiment of the present invention;
fig. 6 shows a flowchart of an interference measurement method for a user equipment according to a second embodiment of the present invention;
fig. 7 and 8 illustrate examples of configuration patterns of downlink reference signals according to an exemplary embodiment of the present invention;
fig. 9 shows a flowchart of an interference measurement method for a base station according to a second embodiment of the present invention;
fig. 10 shows a flowchart of an interference measurement method for a user equipment according to a third embodiment of the present invention;
fig. 11 is a flowchart illustrating an interference measurement method for a base station according to a third embodiment of the present invention;
fig. 12 illustrates a block diagram of a user equipment according to an exemplary embodiment of the present invention;
fig. 13 shows a block diagram of a base station according to an exemplary embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.
Fig. 1 illustrates a flowchart of an interference measurement method for a user equipment according to an exemplary embodiment of the present invention. As an example, the user equipment may be a user equipment supporting full-duplex communication or half-duplex communication.
Referring to fig. 1, a downlink reference signal is received from a base station in step S101.
As an example, a first category of downlink reference signals may be received from a base station. Here, the downlink reference signals of the first category are: the time frequency resource where the downlink reference signal is located has a downlink reference signal for scheduled uplink transmission, in other words, the base station schedules uplink transmission of one or more user equipments on the time frequency resource where the downlink reference signal of the first category is located.
As another example, the downlink reference signals of the first class and the downlink reference signals of the second class may be received from the base station, respectively. Here, the downlink reference signals of the second category are: there is no downlink reference signal for scheduled uplink transmission on the time frequency resource where the base station is located, in other words, the base station does not schedule uplink transmission of any user equipment on the time frequency resource where the downlink reference signal of the second category is located.
In step S102, based on the received first category of downlink reference signal, interference strength information of co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the received first category of downlink reference signal is located to the current user equipment (that is, the user equipment executing the interference measurement method) is obtained, or information used by the base station to obtain the interference strength information of the co-channel interference or the self-interference is obtained.
As an example, the interference strength information can indicate a magnitude of an interference strength of the corresponding co-channel interference or self-interference. As an example, the interference strength information may be a specific numerical value, or may be a quantization level of the numerical value. For example, when the interference strength information is a specific value, the larger the interference strength information is, the larger the interference strength of the corresponding co-channel interference or self-interference is.
It should be understood that the ue performing uplink transmission on the time-frequency resource where the received uplink reference signal is located may be the current ue itself, or may be other ues. If the user equipment performing uplink transmission on the time-frequency resource where the received uplink reference signal is located is a plurality of user equipments, the interference strength information of co-channel interference or self-interference of each user equipment in the plurality of user equipments to the current user equipment may be obtained, or the information is used by the base station to obtain the interference strength information of co-channel interference or self-interference of each user equipment to the current user equipment.
As an example, the estimated first class of downlink reference signal portion may be subtracted from the received signal and the interference strength information may be determined based on the remaining signal portion. For example, an average power value of a symbol corresponding to the remaining signal portion or a quantization level of the average power value may be used as the interference strength information. For example, the first category of downlink reference signal portion in the received signal may be estimated by: estimating a downlink channel based on the received downlink reference signal of the first category, and reconstructing a downlink reference signal part of the first category in the received signal based on the estimated parameters of the downlink channel. It should be appreciated that other suitable ways of determining the interference strength information based on the remaining signal portion may be used.
As another example, the interference strength information may be determined based on channel measurements obtained for the received downlink reference signals of the first class. As an example, the channel measurements may include at least one of: reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal to Interference Noise Ratio (SINR). For example, a ratio between reference signal received power and signal to interference plus noise ratio of the received downlink reference signal of the first category or a quantization level of the ratio may be used as the interference strength information. It should be appreciated that other suitable manners may be used to determine the interference strength information based on channel measurements obtained for the received downlink reference signals of the first category.
As another example, the interference strength information may be obtained based on the received downlink reference signals of the first class and the received downlink reference signals of the second class. For example, a difference value between an average power value of a symbol corresponding to the received first category of downlink reference signals and an average power value of a symbol corresponding to the received second category of downlink reference signals, or a quantization level of the difference value, may be used as the interference strength information. For example, a difference between the reference signal received quality of the received downlink reference signal of the second class and the reference signal received quality of the received downlink reference signal of the first class or a quantization level of the difference may be used as the interference strength information. For example, a difference between the received signal to interference plus noise ratio of the second type of downlink reference signal and the received signal to interference plus noise ratio of the first type of downlink reference signal or a quantization level of the difference may be used as the interference strength information. It should be understood that other suitable manners may be used to obtain the interference strength information based on the received downlink reference signals of the first class and the downlink reference signals of the second class.
As an example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the received downlink reference signals of the first category. For example, the channel measurements may include: reference signal received power and signal to interference and noise ratio.
As another example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the received downlink reference signals of the first class and channel measurements obtained for the received downlink reference signals of the second class. For example, the channel measurements may include: reference signal received quality and/or signal to interference and noise ratio.
As another example, the information for the base station to acquire the interference strength information may include: the average power value of the symbol corresponding to the received downlink reference signal of the first category and the average power value of the symbol corresponding to the received downlink reference signal of the second category.
In addition, as an example, the interference strength information or the information for the base station to obtain the interference strength information may be obtained based on a plurality of received downlink reference signals of a first category, where the user equipments performing uplink transmission on the time-frequency resources where the downlink reference signals of the first category are located are the same. Therefore, the interference strength information respectively obtained for each of the plurality of first-class downlink reference signals or the information used for the base station to obtain the interference strength information can be subjected to calculation such as averaging, and the calculation result is reported to the base station, so that the accuracy of interference measurement is improved.
As an example, the interference measurement method for a user equipment according to an exemplary embodiment of the present invention may further include: determining whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal.
As an example, whether the received downlink reference signal is a first category downlink reference signal or a second category downlink reference signal may be determined based on information received from the base station indicating a configuration mode of the downlink reference signal, a duration of the configuration mode, and a starting position of the configuration mode, wherein the configuration mode of the downlink reference signal defines the number and the order of the first category downlink reference signal and the second category downlink reference signal in each period.
As another example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on a transmission manner of the received downlink reference signal. Specifically, the downlink reference signals of the first category and the downlink reference signals of the second category are transmitted in different manners, so that the category of the downlink reference signals can be determined based on the transmission manner of the downlink reference signals. For example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on at least one of a frequency domain offset position, a spreading code, and a scrambling code of the received downlink reference signal.
As another example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on a reference signal type of the received downlink reference signal. Specifically, the downlink reference signals of the first category and the downlink reference signals of the second category have different specific reference signal types, so that the category of the downlink reference signals can be determined based on the specific reference signal types of the downlink reference signals. For example, the reference signal type may include at least one of: a Synchronization Signal Block (SSB), a Channel State Information-Reference Signal (CSI-RS), which may further include a non-zero power CSI-RS: NZP-CSI-RS, or a zero power CSI-RS: ZP-CSI-RS).
As another example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on a type of measurement quantity that the received downlink reference signal is required to report. For example, for the second category of downlink reference signals, the base station generally requires reporting of channel measurements, and for the first category of downlink reference signals, the base station generally requires reporting of interference strength information.
Further, as an example, before receiving the downlink reference signal from the base station, it may also be determined whether the downlink reference signal to be received is the downlink reference signal of the first category or the downlink reference signal of the second category by the above-mentioned manner or another appropriate manner.
In step S103, the obtained interference strength information or the information for the base station to obtain the interference strength information of the co-channel interference is reported to the base station. That is, the electronic device may acquire the corresponding interference strength information and report the information to the base station, or the electronic device may report the information for the base station to acquire the corresponding interference strength information to the base station and the base station may acquire the corresponding interference strength information.
As an example, the acquired interference strength information or information obtained for the received first category of downlink reference signals for the base station to acquire the interference strength information may be reported to the base station in a specific manner, so that the base station can determine the first category of downlink reference signals corresponding to the received interference strength information or information for the base station to acquire the interference strength information. For example, the obtained interference strength information or information for the base station to obtain the interference strength information may be reported to the base station at a time point associated with a time-frequency resource in which the received downlink reference signal of the first category is located in a prescribed manner. For example, the acquired interference strength information or information used for the base station to acquire the interference strength information may be reported to the base station together with the identification information of the received reference signal of the first category.
Further, for example, when reporting the information for the base station to acquire the interference strength information obtained for the second type downlink reference signal to the base station, the information may also be reported to the base station in the specific manner described above so that the base station can identify the second type downlink reference signal corresponding to the received information for the base station to acquire the interference strength information.
In addition, it should be understood that the ue may further obtain, for the received first category of downlink reference signals and/or second category of downlink reference signals, channel measurement quantity required to be reported by the base station, and report the obtained channel measurement quantity to the base station to notify the base station of the channel measurement result. And when the information for the base station to acquire the interference strength information is the channel measurement quantity required to be reported for the received first-class downlink reference signal and/or the second-class downlink reference signal, the same information may not be repeatedly reported, and the base station may obtain a channel measurement result based on the reported information, or may acquire the interference strength information based on the reported information.
Fig. 2 illustrates a flowchart of an interference measurement method for a base station according to an exemplary embodiment of the present invention.
Referring to fig. 2, in step S201, a downlink reference signal of a first class is transmitted to at least one user equipment.
Receiving, in step S202, interference strength information reported for the first category of downlink reference signals from the at least one ue; or, the interference strength information is acquired based on information, which is reported by the at least one ue for the first category of downlink reference signals and is used for the base station to acquire the interference strength information.
As an example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the downlink reference signals of the first category. As an example, a ratio between reference signal received power and signal to interference plus noise ratio reported by each user equipment for the downlink reference signal of the first category or a quantization level of the ratio may be used as the interference strength information for each user equipment of the at least one user equipment.
As an example, the interference measurement method for a base station according to an exemplary embodiment of the present invention may further include: and transmitting the downlink reference signals of the second category to the at least one user equipment.
As an example, the interference strength information is obtained based on information, reported by the at least one user equipment for the first category of downlink reference signals and the second category of downlink reference signals respectively, for a base station to obtain the interference strength information.
As an example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the first category of downlink reference signals and channel measurements obtained for the second category of downlink reference signals. As an example, a difference between the channel measurement amount reported by each ue for the downlink reference signal of the second category and the channel measurement amount reported for the downlink reference signal of the first category, or a quantization level of the difference, may be respectively used as the interference strength information for each of the at least one ue. For example, the channel measurements may be: reference signal received quality or signal to interference plus noise ratio.
As another example, the information for the base station to acquire the interference strength information may include: the average power value of the symbol corresponding to the downlink reference signal obtained for the downlink reference signal of the first category and the average power value of the symbol corresponding to the downlink reference signal obtained for the downlink reference signal of the second category. As an example, for each of the at least one ue, a difference value between an average power value of a symbol corresponding to the downlink reference signal reported by each ue for the first category of downlink reference signals and an average power value of a symbol corresponding to the downlink reference signal reported for the second category of downlink reference signals, or a quantization level of the difference value, may be used as the interference strength information.
As an example, the received interference strength information may be obtained by the at least one user equipment based on the downlink reference signals of the first class and the downlink reference signals of the second class.
As an example, the interference measurement method for a base station according to an exemplary embodiment of the present invention may further include: and identifying the received interference strength information or the first type downlink reference signal corresponding to the information for the base station to acquire the interference strength information. For example, the first category of downlink reference signals corresponding to the received interference strength information or the information for the base station to obtain the interference strength information may be determined according to the reporting time of the interference strength information reported by the at least one ue or the information for the base station to obtain the interference strength information. For example, the corresponding downlink reference signal may be identified based on identification information of the downlink reference signal received together with the received interference strength information or information for the base station to acquire the interference strength information.
Further, as an example, the first category downlink reference signal and the second category downlink reference signal may be transmitted to the at least one ue according to a specific configuration pattern of downlink reference signals, and information indicating the specific configuration pattern, a duration of the specific configuration pattern, and a starting position of the specific configuration pattern may be transmitted to the at least one ue, where the configuration pattern of downlink reference signals defines the number and the order of the first category downlink reference signals and the second category downlink reference signals in each period.
As an example, the downlink reference signals of the first category may be transmitted to the at least one user equipment according to a first transmission method, and the downlink reference signals of the second category may be transmitted to the at least one user equipment according to a second transmission method. For example, the downlink reference signals of the first category may be sent to the at least one user equipment according to the first frequency domain offset position, and the downlink reference signals of the second category may be sent to the at least one user equipment according to the second frequency domain offset position. For example, a first type of downlink reference signal may be transmitted to the at least one user equipment using a first spreading code or a first scrambling code, and a second type of downlink reference signal may be transmitted to the at least one user equipment using a second spreading code or a second scrambling code.
As an example, the first category of downlink reference signals may be downlink reference signals of a first reference signal type, and the second category of downlink reference signals may be downlink reference signals of a second reference signal type.
As an example, the at least one user equipment uplink channel measurement may be notified only for downlink reference signals of the second class.
As an example, a plurality of first category downlink reference signals may be sent to the at least one ue, where the ue performing uplink transmission on the time-frequency resources where the plurality of first category downlink reference signals are located is the same. On this basis, as an example, the interference strength information may be obtained based on information, reported by the at least one user equipment for the plurality of downlink reference signals of the first category, for obtaining interference strength information by the base station. On this basis, as an example, the received interference strength information is obtained by the at least one user equipment based on the plurality of downlink reference signals of the first category.
In step S203, the received or acquired interference strength information is taken as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment. Specifically, for each ue in the at least one ue, the interference strength information received from each ue or the interference strength information obtained based on the information received from each ue and used by the base station to obtain the interference strength information is used as the interference strength information of the co-channel interference or the self-interference of the ue performing uplink transmission on the time-frequency resource where the ue is located by the downlink reference signal of the first class corresponding to the interference strength information.
As an example, the interference measurement method for a base station according to an exemplary embodiment of the present invention may further include: identifying electronic equipment pairs with different co-channel interference conditions; and using the identified interference strength information of the co-channel interference of one electronic device in the pair of electronic devices to another electronic device as the interference strength information of the co-channel interference of the other electronic device to the one electronic device, wherein the co-channel interference situation of one electronic device in the pair of electronic devices with different co-channel interference situations to the other electronic device is similar to the co-channel interference situation of the other electronic device to the one electronic device.
As an example, the interference measurement method for a base station according to an exemplary embodiment of the present invention may further include: and scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference strength information of the user equipment subjected to the co-channel interference of other user equipment and/or self-interference of the user equipment.
As an example, when it is determined that uplink transmission of one user equipment is scheduled on a time-frequency resource, downlink transmission of at least one user equipment whose interference strength information of co-channel interference or self-interference by the one user equipment satisfies a first preset condition may be scheduled on the time-frequency resource.
As an example, when it is determined that downlink transmission of one user equipment is scheduled on a time-frequency resource, uplink transmission of at least one user equipment whose interference strength information of co-channel interference or self-interference to the one user equipment meets a second preset condition may be scheduled on the time-frequency resource.
As an example, uplink and downlink transmissions of a pair of user equipments or a single user equipment may be scheduled on the same time-frequency resource, where interference strength information of co-channel interference of one user equipment to another user equipment or self-interference of the single user equipment in the pair of user equipments satisfies a third preset condition.
According to the exemplary embodiment of the invention, the base station can perform more accurate scheduling on the user equipment in the cell based on the acquired interference strength information of the co-channel interference between the user equipment in the cell or the self-interference of the user equipment so as to schedule the user equipment with small co-channel interference or the user equipment with small self-interference to perform uplink and downlink transmission on the same time frequency resource, thereby reducing the co-channel interference of the user equipment performing uplink transmission on the same time frequency resource to the user equipment performing downlink reception, and improving the transmission rate and throughput of the wireless communication system.
Hereinafter, the interference measurement method according to the exemplary embodiment of the present invention will be described in detail with reference to the first to third embodiments.
Example one
Fig. 3 shows a flowchart of an interference measurement method for a user equipment according to a first embodiment of the present invention.
Referring to fig. 3, a downlink reference signal of a first class is received from a base station at step S301.
The base station configures some downlink Reference signals for Channel measurement or interference (co-Channel interference and/or self-interference) measurement, where the downlink Reference signals may be Synchronization Signal Blocks (SSBs), or Channel State Information Reference signals (CSI-RS, which may further include non-zero power CSI-RS: NZP-CSI-RS, or zero power CSI-RS: ZP-CSI-RS), or other types of Reference signals. The time-frequency resource position of the downlink reference signal can be notified to the user equipment by the base station through control information, and the base station can transmit the downlink reference signal periodically (period), or Semi-persistently (Semi-Persistent), or in an Event-driven (Event-Triggered) manner.
The downlink reference signal of the first category is at a time-frequency resource location where the downlink reference signal is located, and the base station schedules the downlink reference signal of uplink transmission of one or more user equipments at the same time, so that all the user equipments (including the user equipment performing uplink transmission, where the user equipment performing uplink transmission supports full-duplex communication) or some of the user equipments in the cell can utilize the downlink reference signal of the first category to measure interference strength information of the user equipment performing uplink transmission on the co-channel interference or self-interference of the user equipment.
In step S302, based on the received first category downlink reference signal, interference strength information of co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the received first category downlink reference signal is located to the current user equipment is obtained.
As an example, the downlink channel may be estimated based on the received downlink reference signal of the first category, and the downlink reference signal part of the first category in the received signal may be reconstructed based on the estimated parameters of the downlink channel, and then the reconstructed downlink reference signal part of the first category may be subtracted from the received signal, and the interference strength information may be determined based on the remaining signal part.
As an example, an average power value of symbols corresponding to the remaining signal portion or a quantization level of the average power value may be used as the interference strength information. It should be noted that the interference strength information calculated in this way actually reflects the co-channel interference or self-interference between the user equipments in the cell, and the interference strength of the inter-cell interference and noise, and for the small cell, because the distance between the user equipments is short, the co-channel interference or self-interference between the user equipments in the cell is a main component, and the interference strength information calculated in this way can better reflect the interference strength of the co-channel interference or self-interference between the user equipments in the cell.
Furthermore, as another example, the interference strength information may be determined based on channel measurements obtained for the received downlink reference signals of the first class. For example, a ratio between reference signal received power and signal to interference plus noise ratio of the received downlink reference signal of the first category or a quantization level of the ratio may be used as the interference strength information.
As an example, the interference strength information may be a calculated numerical value (or an absolute value of the calculated numerical value), or may be a quantized level obtained by quantizing the calculated numerical value (or the absolute value), for example, the interference strength of the co-channel interference may be measured as 256 levels I0，I1，……，I255The quantization level corresponding to the calculated value can be obtained, for example, 8 bits of information can be used to represent the corresponding quantization level.
In step S303, the acquired interference strength information is reported to the base station.
As an example, the measurement quantity that needs to be reported by the ue for the downlink reference signal (e.g., interference strength information needs to be reported for the downlink reference signal of the first category) and the reporting manner may be configured by the base station. For example, the measurement quantity may be reported periodically, for example, through a Physical Uplink Control Channel (PUCCH), or aperiodically, for example, through a Physical Uplink Shared Channel (PUSCH).
If the measurement quantity reported by the ue is the interference strength information, the base station needs to know which ue indicated by the interference strength information is the interference strength of the interference caused by the ue reporting the interference strength information, that is, the base station needs to know the identity (Identification: ID) of the ue generating interference (co-channel interference or self-interference) corresponding to the interference strength information. Thus, as an example, the ue may report the acquired interference strength information to the base station in a specific manner, so that the base station can determine the interfering ue corresponding to the received interference strength information.
Considering that the base station knows the ue scheduled for uplink transmission on the time-frequency resource where the first type of downlink reference signal is located, the base station only needs to know the first type of downlink reference signal corresponding to the reported interference strength information, and can determine the ID of the interfering ue corresponding to the reported interference strength information. As an example, the acquired interference strength information may be reported to the base station in a specific manner, so that the base station can determine the downlink reference signal of the first category corresponding to the received interference strength information.
As an example, the specific manner may be to associate a time when the user equipment reports the interference strength information with a time-frequency resource location of the corresponding first category of downlink reference signal, and specifically, the obtained interference strength information may be reported to the base station at a time when the time-frequency resource location of the received first category of downlink reference signal is associated in a prescribed manner. For example, a downlink reference signal at a predetermined time T corresponds to a measurement quantity reported at time T + kT, where T is a time slot length, and k is an integer greater than 0.
As another example, the specific manner may be that the ue reports the identification information of the downlink reference signal corresponding to the interference strength information when reporting the interference strength information. Specifically, the acquired interference strength information may be reported to the base station together with identification information of the reference signal of the first category corresponding thereto. For example, the identification information of the first class of reference signals may be: a time-frequency resource location or spreading code codeword for a first class of reference signals.
Fig. 4 illustrates an example of performing co-channel interference measurement based on a first category of downlink reference signals according to an exemplary embodiment of the present invention, where a ue may receive interference strength information for measuring co-channel interference to the ue from different ues, and each time the ue receives the first category of downlink reference signals, may obtain interference strength information of co-channel interference or self-interference to the ue performing uplink transmission on a time-frequency resource where the received first category of downlink reference signals is located, and report the information to a base station.
In addition, in order to improve the accuracy of the interference strength information measurement, as an example, a plurality of first class downlink reference signals may be received from the base station, and the time frequency resources where the plurality of first classes of downlink reference signals are located are the same as the user equipment scheduled for uplink transmission, in other words, the base station may schedule uplink transmission of the same user equipment at the time frequency resources where the plurality of first classes of downlink reference signals are located, for example, may transmit 3 downlink reference signals at consecutive 3 time frequency resource positions, and scheduling uplink transmission of the same user equipment at the 3 time-frequency resource positions, wherein the user equipment can average interference strength information obtained by aiming at each downlink reference signal when measuring the interference strength information of the uplink transmission user equipment on the co-channel interference or self-interference of the user equipment, and report the average value to the base station.
Fig. 5 is a flowchart illustrating an interference measurement method for a base station according to a first embodiment of the present invention.
Referring to fig. 5, in step S401, a downlink reference signal of a first class is transmitted to at least one user equipment.
In step S402, interference strength information reported for the first category of downlink reference signals is received from the at least one user equipment.
In step S403, the received interference strength information is taken as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
As an example, the base station may obtain interference strength information of each user equipment subjected to co-channel interference or self-interference of each user equipment by performing the interference measurement method for the base station according to the first embodiment of the present invention.
As an example, the acquired interference strength information may be maintained as a table of interference strengths. For example, the interference strength information about the co-channel interference or the self-interference among N ues may be saved and updated in the manner of table 1, where rows in table 1 correspond to the ues generating interference (co-channel interference or self-interference), i.e., the ues generating interference corresponding to the same row in table 1 are the same, columns in table 1 correspond to the ues receiving interference, the ues receiving interference corresponding to the same column in table 1 are the same, the value at table (i, j) represents the interference strength level of the co-channel interference generated by ue i to ue j, the value at table (i, i) represents the interference strength level of the self-interference of ue i, and the value of "-" represents the interference-free strength measurement result.
TABLE 1 interference Strength Meter
Figure BDA0002031718180000221
As an example, the base station may update the interference strength table in real time based on the interference strength information reported by the ue. For example, referring to fig. 4, the ue may measure interference strength information based on the received first category of downlink reference signals, and when the ue i is scheduled to perform uplink data transmission on the time-frequency resource where the first category of downlink reference signals is located, all ues in the cell may measure interference strength information of the ue i on the same channel interference or self-interference to itself based on the first category of downlink reference signals and report the information to the base station, and accordingly, the base station updates the ith data in table 1, and for other first categories of downlink reference signals, may obtain corresponding interference strength information and update table 1 in the manner described above.
As an example, the interference measurement method for a base station according to the first embodiment of the present invention may further include: identifying electronic equipment pairs with different co-channel interference conditions; and using the identified interference strength information of the co-channel interference of one electronic device in the pair of electronic devices to another electronic device as the interference strength information of the co-channel interference of the other electronic device to the one electronic device, wherein the co-channel interference situation of one electronic device in the pair of electronic devices with different co-channel interference situations to the other electronic device is similar to the co-channel interference situation of the other electronic device to the one electronic device. Specifically, if the co-channel interference conditions of the user equipment i and the user equipment j are different, that is, the co-channel interference condition of the user equipment i to the user equipment j is similar to the co-channel interference condition of the user equipment j to the user equipment i, if the base station updates the ith row data in table 1 based on the received interference strength information, the base station may also update the ith column data in table 1 accordingly.
As an example, when the number of antennas of two electronic devices is the same, the two electronic devices may be determined as electronic devices having different co-channel interference conditions.
As an example, the interference measurement method for a base station according to the first embodiment of the present invention may further include: and scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference strength information of the user equipment on the co-channel interference of other user equipment and/or self-interference of the user equipment.
It should be understood that, when uplink and downlink transmissions are scheduled simultaneously on the same time-frequency resource, the uplink and downlink transmissions may belong to different user equipments or belong to the same user equipment supporting full duplex communication.
As an example, when it is determined that uplink transmission of one user equipment is scheduled on a time-frequency resource, downlink transmission of at least one user equipment whose interference strength information of co-channel interference or self-interference by the one user equipment satisfies a first preset condition may be scheduled on the time-frequency resource.
For example, when uplink transmission of a certain user equipment has been scheduled on the scheduled time-frequency resources based on some scheduling criterion (e.g., proportional fairness criterion, etc.), when scheduling the ue for downlink transmission on the time-frequency resource, the ue with less co-channel interference or self-interference from the uplink ue (i.e. the ue with less interference strength information from the co-channel interference or self-interference from the uplink ue) may be selected, for example, the user equipment with the smallest co-channel interference and self-interference by the uplink user equipment (i.e., the user equipment with the smallest interference strength information by the co-channel interference and self-interference by the uplink user equipment) may be selected, or selecting a user equipment with co-channel interference or self-interference smaller than a preset threshold (i.e. one of the user equipments with co-channel interference or self-interference strength information smaller than the preset threshold).
As an example, when it is determined that downlink transmission of one user equipment is scheduled on a time-frequency resource, uplink transmission of at least one user equipment whose interference strength information of co-channel interference or self-interference to the one user equipment meets a preset condition may be scheduled on the time-frequency resource.
For example, when downlink transmission of a certain ue has been selected on a scheduled time-frequency resource based on a certain scheduling criterion (e.g., a proportional fair criterion, etc.), and when uplink transmission of the user equipment on the time-frequency resource is scheduled, a ue with smaller co-channel interference or self-interference to the downlink user equipment is selected, for example, a ue with the smallest co-channel interference and self-interference to the downlink user equipment may be selected, and a ue with smaller co-channel interference or self-interference to the downlink user equipment than a preset threshold may also be selected.
As an example, uplink and downlink transmissions of a pair of user equipments or a single user equipment may be scheduled on the same time-frequency resource, where interference strength information of co-channel interference of one user equipment to another user equipment or self-interference of the single user equipment in the pair of user equipments satisfies a third preset condition.
Specifically, if there is no priority to schedule transmission in one direction on the time-frequency resource, a pair of ues with smaller co-channel interference may be simultaneously selected to schedule uplink and downlink transmission or select uplink and downlink transmission of a single ue based on a certain scheduling criterion. For example, the interference strength table may be traversed, and a pair of ues with smaller co-channel interference may be selected to schedule uplink and downlink transmission respectively, or a single ue with smaller interference may be selected to schedule uplink and downlink transmission.
Further, as an example, the interference measurement method according to the exemplary embodiment of the present invention may be used in combination with an interference estimation method based on location information, for example, the initialization of the interference strength table may be based on the location information of the user equipment, and the interference strength table is updated during a subsequent transmission process based on the interference measurement result obtained by the interference measurement method according to the exemplary embodiment of the present invention.
Example two
Fig. 6 shows a flowchart of an interference measurement method for a user equipment according to a second embodiment of the present invention.
Referring to fig. 6, in step S501, a first category downlink reference signal and a second category downlink reference signal are received from a base station.
In step S502, based on the received first category downlink reference signal and the second category downlink reference signal, interference strength information of co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the received first category downlink reference signal is located to the current user equipment is obtained.
In other words, the base station schedules uplink transmission of the user equipment on the time-frequency resource where a part of the downlink reference signals are located, and does not schedule uplink transmission of the user equipment on the time-frequency resources where other downlink reference signals are located, so that the user equipment in the cell can calculate interference strength information of co-channel interference or self-interference of the user equipment scheduled for uplink transmission on the user equipment based on the downlink reference signals of the two categories, and thus the interference strength of co-channel interference or self-interference among the user equipment in the cell can be measured more accurately.
As an example, a difference Pw-Po between an average power Pw of a symbol corresponding to the received first category of downlink reference signals and an average power Po of a symbol corresponding to the received second category of downlink reference signals, or a quantization level of the difference, may be used as the interference strength information.
As another example, a difference value between the channel measurement amount obtained for the received downlink reference signal of the second class and the channel measurement amount obtained for the received downlink reference signal of the first class or a quantization level of the difference value may be used as the interference strength information. For example, the channel measurements may be: reference signal received quality or signal to interference plus noise ratio.
Since the ue receives both the first type of downlink reference signal and the second type of downlink reference signal, the base station needs to notify the ue whether there is scheduled uplink transmission in the time-frequency resource location of the downlink reference signal, in other words, the ue determines whether the received downlink reference signal is the first type of downlink reference signal or the second type of downlink reference signal.
As an example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on information received from a base station indicating a configuration mode of the downlink reference signal, a duration of the configuration mode, and a starting position of the configuration mode. The configuration mode of the downlink reference signals defines the number and the sequence of the first type of downlink reference signals and the second type of downlink reference signals in each period.
Fig. 7 and 8 illustrate examples of configuration patterns of downlink reference signals according to an exemplary embodiment of the present invention. As shown in fig. 7, in the configuration mode of the downlink reference signals, uplink transmission of a different user equipment is scheduled at a time-frequency resource position of a downlink reference signal every other position of a second type of downlink reference signal, and this configuration mode is repeated with a period T1, that is, in each period, a second type of downlink reference signal is sent first, and then a first type of downlink reference signal is sent, and uplink user equipments scheduled on time-frequency resources where first type of downlink reference signals in different periods are located may be different. As shown in fig. 8, in the configuration mode of the downlink reference signals, uplink transmission of the same user equipment is scheduled on time-frequency resource positions of 3 consecutive downlink reference signals every 3 positions of the downlink reference signals of the second category, and this mode is repeated with a period T2, that is, in each period, 3 downlink reference signals of the second category are sent first, and then 3 downlink reference signals of the first category are sent, and uplink user equipments scheduled on time-frequency resources where the downlink reference signals of the first category in the same period are located are the same, and uplink user equipments scheduled on time-frequency resources where the downlink reference signals of the first category in different periods are located may be different. As shown in fig. 7 or fig. 8, the downlink reference signal may be repeatedly performed in a certain configuration mode, and accordingly, each configuration mode may be numbered, and the base station only needs to notify the user equipment of the number of the configuration mode of the downlink reference signal, the duration of the configuration mode, and the starting position of the configuration mode.
As another example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on a transmission manner of the received downlink reference signal.
For example, the offset of the position of the downlink reference signal on the time frequency resource or different spreading codes or scrambling codes can be used to distinguish whether uplink transmission of the user equipment exists on the time frequency resource where the downlink reference signal exists, for example, uplink transmission of the user equipment is not scheduled on the time frequency resource where the CSI-RS exists at some offset positions of the frequency domain, and uplink transmission of the user equipment is scheduled on the time frequency resource where the CSI-RS exists at other offset positions; or some of the spread spectrum code spread spectrum downlink reference signals do not schedule the uplink transmission of the user equipment, and other spread spectrum code spread spectrum downlink reference signals schedule the uplink transmission of the user equipment. Accordingly, the user equipment may determine whether the received downlink reference signal is the first category of downlink reference signal or the second category of downlink reference signal based on an offset position (offset) of the received downlink reference signal on a frequency domain or a spreading code.
As another example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on a reference signal type of the received downlink reference signal.
For example, the base station may not schedule uplink transmission of the user equipment in the time frequency resource where the SSB is located, and schedule uplink transmission of the user equipment in the time frequency resource where the CSI-RS is located; or the time frequency resource where the NZP-CSI-RS is located does not schedule uplink transmission of the user equipment, and the time frequency resource where the ZP-CSI-RS is located schedules uplink transmission of the user equipment. Correspondingly, when the downlink reference signal received by the user equipment is the SSB, the received downlink reference signal may be determined to be a second category of downlink reference signal; when the received downlink reference signal is a CSI-RS, the received downlink reference signal can be determined to be a first type of downlink reference signal; when the received downlink reference signal is an NZP-CSI-RS, the received downlink reference signal can be determined to be a second type of downlink reference signal; when the received downlink reference signal is a ZP-CSI-RS, the received downlink reference signal can be determined to be a first type of downlink reference signal.
As another example, whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal may be determined based on a type of measurement quantity that the received downlink reference signal is required to report.
When calculating channel measurement quantities (e.g., RSRP, RSRQ, SINR), the user equipment needs to distinguish whether there is uplink transmission at a downlink reference signal for channel measurement. For example, when performing cell selection based on RSRP, co-channel interference between user equipments in a cell is generally not considered, and therefore, some channel measurement quantities (e.g., RSRP) need to be obtained based on downlink reference signals when there is no uplink transmission. The measurement quantity (RSRP, RSRQ, SINR, interference strength information I, etc.) to be reported by the ue, the resources used for reporting, the reporting time, etc. may all be configured by the base station.
In addition, as an example, to improve the accuracy of the interference strength measurement, the base station may not schedule uplink transmission of the user at the time-frequency resource where the consecutive downlink reference signals are located, and/or schedule uplink transmission of the same user equipment at the time-frequency resource where the consecutive downlink reference signals are located, so that the user equipment may calculate the measurement amount more accurately by using the consecutive downlink reference signals. For example, referring to fig. 8, the base station configures 3 downlink reference signal resources first, and uplink transmission is not scheduled on these resources, and the user equipment may calculate channel measurements (e.g., an average of channel measurements obtained for each downlink reference signal) by using the 3 downlink reference signal resources; in the subsequent 3 downlink reference signal resource positions, the base station may schedule uplink transmission of the user equipment i, and then the user equipment may calculate a measurement quantity including co-channel interference of the user equipment i in the cell by using the 3 downlink reference signal resources. Accordingly, the interference strength information of the co-channel interference or the self-interference of the user equipment i to the current user equipment may be obtained by subtracting the average power values of the received symbols respectively calculated for the two downlink reference signals.
It should be understood that, in addition to the downlink reference signals of the second category may be used to obtain the interference strength information, the ue may also perform channel measurement by using the downlink reference signals of the second category and report the channel measurement result to the base station. For example, the measured channel measurement may include at least one of a reference signal received power, a reference signal received quality, a signal to interference plus noise ratio, and the like.
In step S503, the acquired interference strength information is reported to the base station.
Fig. 9 shows a flowchart of an interference measurement method for a base station according to a second embodiment of the present invention.
Referring to fig. 9, in step S601, a downlink reference signal of a first class and a downlink reference signal of a second class are transmitted to at least one user equipment.
In step S602, interference strength information reported for the first category of downlink reference signals is received from the at least one ue, where the interference strength information is obtained by the at least one ue based on the first category of downlink reference signals and the second category of downlink reference signals.
In step S603, the received or acquired interference strength information is taken as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
As an example, the interference measurement method for a base station according to the second embodiment of the present invention may further include: and scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference strength information of the user equipment on the co-channel interference of other user equipment and/or self-interference of the user equipment.
EXAMPLE III
Fig. 10 shows a flowchart of an interference measurement method for a user equipment according to a third embodiment of the present invention.
Referring to fig. 10, in step S701, a downlink reference signal of a first class and a downlink reference signal of a second class are received from a base station.
In step S702, based on the received first category downlink reference signal and the second category downlink reference signal, information of interference strength information of co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the base station obtains the received first category downlink reference signal is to the current user equipment is obtained.
As an example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the received downlink reference signals of the first class and channel measurements obtained for the received downlink reference signals of the second class. For example, the channel measurements may include at least one of: reference signal received quality, signal to interference plus noise ratio.
As an example, the base station may only notify the user equipment of the time-frequency resource locations of the downlink reference signals, and does not notify that there is no uplink transmission in these time-frequency resource locations. In this case, when the ue calculates the measurement amount, it does not distinguish the time-frequency resource location where the downlink reference signal is located, and there is no uplink transmission, that is, it does not distinguish the first type of downlink reference signal from the second type of downlink reference signal, and only needs to calculate and report the measurement amount required by the base station. In order to calculate the interference strength of co-channel interference between user equipments, the base station only needs to configure the measurement quantity reported by the user equipment according to the configured downlink reference signal condition.
As another example, the user equipment may be informed in an appropriate manner whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal. Accordingly, the user equipment may determine whether the received downlink reference signal is a downlink reference signal of a first category or a downlink reference signal of a second category, in which case the user equipment needs to distinguish between the two categories of downlink reference signals when calculating and reporting the measurement quantity, e.g., when calculating and reporting SINR (rsrq), SINR without uplink transmission is calculated and reported, respectively1(RSRQ1) And SINR when there is uplink transmission2(RSRQ2). For example, referring to fig. 8, the user equipment may calculate SINR based on downlink reference signals of a first class within one period2(RSRQ2) And reports to the base station, and calculates SINR based on the downlink reference signal of the second category in one period1(RSRQ1) And reports to the base station.
Further, as an example, the information for the base station to acquire the interference strength information may be acquired only for the received downlink reference signal of the first category, for example, the information for the base station to acquire the interference strength information may be RSRP and SINR.
In step S703, the acquired information for the base station to acquire the interference strength information is reported to the base station.
Fig. 11 shows a flowchart of an interference measurement method for a base station according to a third embodiment of the present invention.
Referring to fig. 11, in step S801, a downlink reference signal of a first category and a downlink reference signal of a second category are transmitted to at least one user equipment.
In step S802, information reported by the at least one ue for the first category of downlink reference signals and the second category of downlink reference signals and used for a base station to obtain interference strength information is received.
As an example, the information for the base station to obtain the interference strength information may be a channel measurement reported for the downlink reference signal.
In step S803, interference strength information is obtained based on the information, which is reported by the at least one ue for the first category of downlink reference signals and is used for the base station to obtain the interference strength information.
As an example, a difference between the channel measurement quantity reported by each ue for the downlink reference signal of the second category and the channel measurement quantity reported for the downlink reference signal of the first category, or a quantization level of the difference, may be used as the interference strength information, for each of the at least one ue, respectively, where the channel measurement quantity is: reference signal received quality or signal to interference plus noise ratio.
That is, the base station may calculate the interference strength information of the co-channel interference between the ues in the cell based on the channel measurement reported by the ue, for example, if the measurement reported by the ue is SINR1And SINR2Then, the interference strength information of the co-channel interference between the user equipments can be calculated as I-SINR based on SINR1-SINR2(ii) a Similarly, if the measurement quantity reported by the user is RSRQ1And RSRQ2Then, the interference strength information of the co-channel interference between the user equipments may be further calculated as I-RSRQ based on the RSRQ1-RSRQ2。
As another example, the base station may require the user equipment to report both RSRP and SINR for the first category of downlink reference signals, and approximate the interference strength expressing co-channel interference between the user equipment based on the RSRP/SINR reported by the user.
As an example, the amount of channel measurement (e.g., at least one of RSRP, RSRQ, and SINR) that the ue needs to report, the resource used for reporting, the reporting time, and the like may all be configured by the base station. The base station can calculate the interference strength of co-channel interference or self-interference between the user equipments according to the channel measurement reported by the user equipments and the corresponding relationship between the channel measurement and the downlink reference signal. In order to determine the corresponding relationship between the channel measurement quantity and the downlink reference signal, for example, it may be specified that a time for sending the downlink reference signal is associated with a reporting time of the corresponding channel measurement quantity in a preset manner, for example, when the user equipment reports the channel measurement quantity, a time-frequency resource location or a spreading code of the downlink reference signal corresponding to the measurement quantity may be reported at the same time. Since the base station knows that there are no scheduled uplink transmissions and no IDs of users performing uplink transmissions at the downlink reference signal location, the base station may calculate the interference strength of co-channel interference or self-interference between user equipments based on the reported channel measurements. It should be noted that, if the reported channel measurement is a quantized level, the interference strength of the co-channel interference or the self-interference between the ues calculated based on the channel measurement is also a quantized interference strength.
In step S804, the acquired interference strength information is taken as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
As an example, the interference measurement method for a base station according to the third embodiment of the present invention may further include: and scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference strength information of the user equipment on the co-channel interference of other user equipment and/or self-interference of the user equipment.
Fig. 12 illustrates a block diagram of a user equipment according to an exemplary embodiment of the present invention.
As shown in fig. 12, the user equipment according to an exemplary embodiment of the present invention includes: receiving section 101, processing section 102, and transmitting section 103.
The receiving unit 101 is configured to receive a downlink reference signal from a base station.
The processing unit 102 is configured to obtain, based on the received first category of downlink reference signals, interference strength information of co-channel interference or self-interference of the user equipment performing uplink transmission on a time-frequency resource where the received first category of downlink reference signals is located to a current user equipment, or obtain, by a base station, information of the interference strength information of the co-channel interference or the self-interference. Wherein the first type of downlink reference signal is: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists.
As an example, the processing unit 102 may subtract the estimated downlink reference signal portion of the first class from the received signal and determine the interference strength information based on the remaining signal portion.
As an example, the processing unit 102 may use an average power value of a symbol corresponding to the remaining signal portion or a quantization level of the average power value as the interference strength information.
As an example, the processing unit 102 may estimate the first category of downlink reference signal part in the received signal by: estimating a downlink channel based on the received downlink reference signal of the first category, and reconstructing a downlink reference signal part of the first category in the received signal based on the estimated parameters of the downlink channel.
As another example, the processing unit 102 may determine the interference strength information based on channel measurements obtained for the received downlink reference signals of the first class.
As an example, the processing unit 102 may use a ratio between reference signal received power and signal to interference and noise ratio of the received downlink reference signal of the first category or a quantization level of the ratio as the interference strength information.
As another example, the processing unit 102 may obtain the interference strength information based on the received downlink reference signals of the first category and the received downlink reference signals of the second category, where the downlink reference signals of the second category are: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
As an example, the processing unit 102 may use, as the interference strength information, a difference value between an average power value of a symbol corresponding to the received first category of downlink reference signals and an average power value of a symbol corresponding to the received second category of downlink reference signals, or a quantization level of the difference value; alternatively, the processing unit 102 may use, as the interference strength information, a difference value between a channel measurement obtained for the received downlink reference signal of the second category and a channel measurement obtained for the received downlink reference signal of the first category, or a quantization level of the difference value, where the channel measurement is: reference signal received quality or signal to interference plus noise ratio.
As an example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the received downlink reference signals of the first category.
As another example, the information for the base station to acquire the interference strength information may include: channel measurements derived for received downlink reference signals of a first category and channel measurements derived for received downlink reference signals of a second category, wherein the channel measurements comprise at least one of: reference signal received quality, signal to interference plus noise ratio, reference signal received power.
As another example, the information for the base station to acquire the interference strength information may include: the average power value of the symbol corresponding to the received downlink reference signal of the first category and the average power value of the symbol corresponding to the received downlink reference signal of the second category.
As an example, the processing unit 102 may obtain the interference strength information or the information for the base station to obtain the interference strength information based on a plurality of received downlink reference signals of a first category, where user equipments performing uplink transmission on time-frequency resources where the plurality of downlink reference signals of the first category are located are the same.
As an example, the user equipment according to an exemplary embodiment of the present invention may further include: a determining unit (not shown) for determining whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal.
As an example, the determining unit may determine whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal based on information received from the base station and indicating a configuration mode of the downlink reference signal, a duration of the configuration mode, and a starting position of the configuration mode, wherein the configuration mode of the downlink reference signal defines the number and order of the first category of downlink reference signal and the second category of downlink reference signal in each period.
As an example, the determining unit may determine whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal based on at least one of a frequency domain offset position, a spreading code, a scrambling code, and a reference signal type of the received downlink reference signal.
As an example, the determining unit may determine whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal based on a type of measurement quantity that the received downlink reference signal is required to report.
The sending unit 103 is configured to report the acquired interference strength information or information used for the base station to acquire the interference strength information to the base station.
As an example, the sending unit 103 may report the acquired interference strength information or the information for the base station to obtain the interference strength information to the base station in a specific manner, so that the base station can determine the downlink reference signal of the first category corresponding to the received interference strength information or the information for the base station to obtain the interference strength information.
Fig. 13 shows a block diagram of a base station according to an exemplary embodiment of the present invention.
As shown in fig. 13, the base station according to an exemplary embodiment of the present invention includes: transmitting section 201, receiving section 202, and processing section 203.
The sending unit 201 is configured to send a first category of downlink reference signals to at least one user equipment, where the first category of downlink reference signals is: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists.
The receiving unit 202 is configured to receive, from the at least one ue, interference strength information reported for the first category of downlink reference signals or information used for a base station to obtain the interference strength information.
The processing unit 203 is configured to, when receiving information for a base station to obtain interference strength information, obtain the interference strength information based on information, reported by the at least one ue for the first category of downlink reference signals, for the base station to obtain the interference strength information; and for using the received or acquired interference strength information as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
As an example, the sending unit 201 may further send a downlink reference signal of a second category to the at least one user equipment, where the downlink reference signal of the second category is: and the time frequency resource where the uplink reference signal is transmitted does not have a scheduled downlink reference signal. Further, as an example, the processing unit 203 may obtain the interference strength information based on information, reported by the at least one ue for the first category of downlink reference signals and the second category of downlink reference signals, for obtaining the interference strength information by the base station, respectively, or the received interference strength information is obtained by the at least one ue based on the first category of downlink reference signals and the second category of downlink reference signals.
As an example, the processing unit 203 may respectively use, for each of the at least one user equipment, a difference value between the channel measurement quantity reported by each user equipment for the downlink reference signal of the second category and the channel measurement quantity reported for the downlink reference signal of the first category, or a quantization level of the difference value, as the interference strength information, where the channel measurement quantity is: reference signal received quality or signal to interference plus noise ratio.
As another example, the processing unit 203 may use, for each of the at least one user equipment, a difference value between an average power value of a symbol corresponding to the downlink reference signal reported by each user equipment for the first category of downlink reference signals and an average power value of a symbol corresponding to the downlink reference signal reported for the second category of downlink reference signals, or a quantization level of the difference value, as the interference strength information.
As an example, the information for the base station to acquire the interference strength information may include: channel measurements obtained for the downlink reference signals of the first category.
As an example, the processing unit 203 may use, for each of the at least one user equipment, a ratio between reference signal received power and signal to interference plus noise ratio reported by each user equipment for the downlink reference signal of the first category, or a quantization level of the ratio, as the interference strength information.
As an example, the sending unit 201 may send, to the at least one user equipment, a first category downlink reference signal and a second category downlink reference signal according to a specific configuration pattern of downlink reference signals, and send, to the at least one user equipment, information indicating the specific configuration pattern, a duration of the specific configuration pattern, and a starting position of the specific configuration pattern, where the configuration pattern of downlink reference signals defines the number and order of the first category downlink reference signals and the second category downlink reference signals in each period.
As an example, the sending unit 201 may send the downlink reference signals of the first category to the at least one user equipment according to the first frequency domain offset position, and send the downlink reference signals of the second category to the at least one user equipment according to the second frequency domain offset position.
As an example, the transmitting unit 201 may transmit the downlink reference signal of the first class to the at least one user equipment using the first spreading code or the first scrambling code, and transmit the downlink reference signal of the second class to the at least one user equipment using the second spreading code or the second scrambling code.
As an example, the first category of downlink reference signals may be downlink reference signals of a first reference signal type, and the second category of downlink reference signals may be downlink reference signals of a second reference signal type.
As an example, the sending unit 201 may inform the at least one user equipment uplink channel measurement amount only for the downlink reference signals of the second category.
As an example, the sending unit 201 may send a plurality of first classes of downlink reference signals to the at least one ue, where the ue performing uplink transmission on the time-frequency resources where the plurality of first classes of downlink reference signals are located is the same, and the processing unit 203 may obtain the interference strength information based on information, which is reported by the at least one ue for the plurality of first classes of downlink reference signals and is used for obtaining the interference strength information by the base station, or the received interference strength information is obtained by the at least one ue based on the plurality of first classes of downlink reference signals.
As an example, the base station according to an exemplary embodiment of the present invention may further include: and an identifying unit (not shown) configured to identify a downlink reference signal of a first category corresponding to the received interference strength information or information used for the base station to obtain the interference strength information.
As an example, the base station according to an exemplary embodiment of the present invention may further include: and a scheduling unit (not shown), configured to schedule uplink and downlink transmissions of the ue on the same time-frequency resource based on interference strength information of co-channel interference and/or self-interference of the ue to other ues.
As an example, when it is determined that uplink transmission of one user equipment is scheduled on a time-frequency resource, the scheduling unit may schedule downlink transmission of at least one user equipment on the time-frequency resource, where interference strength information of co-channel interference or self-interference of the one user equipment satisfies a first preset condition.
As another example, when it is determined that downlink transmission of one user equipment is scheduled on a time-frequency resource, the scheduling unit may schedule uplink transmission of at least one user equipment on the time-frequency resource, where interference strength information of co-channel interference or self-interference to the one user equipment satisfies a second preset condition.
As another example, the scheduling unit may schedule uplink and downlink transmissions of a pair of user equipments or a single user equipment on the same time-frequency resource, where interference strength information of co-channel interference of one user equipment of the pair of user equipments to another user equipment or self-interference of the single user equipment satisfies a third preset condition.
It should be understood that the user equipment and the base station according to the exemplary embodiments of the present invention may perform the methods for interference measurement described with reference to fig. 1 to 11, and are not described herein again in order to avoid repetition.
It should be understood that the various units in the user equipment according to exemplary embodiments of the present invention may be implemented as hardware components and/or software components. The individual units may be implemented, for example, using Field Programmable Gate Arrays (FPGAs) or Application Specific Integrated Circuits (ASICs), depending on the processing performed by the individual units as defined by the skilled person.
It should be understood that the respective units in the base station according to the exemplary embodiment of the present invention may be implemented as hardware components and/or software components. The individual units may be implemented, for example, using Field Programmable Gate Arrays (FPGAs) or Application Specific Integrated Circuits (ASICs), depending on the processing performed by the individual units as defined by the skilled person.
Exemplary embodiments of the present invention provide a computer-readable storage medium storing a computer program which, when executed by a processor, implements the interference measurement method for a user equipment as described in the above exemplary embodiments. The computer readable storage medium is any data storage device that can store data which can be read by a computer system. Examples of computer-readable storage media include: read-only memory, random access memory, read-only optical disks, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the internet via wired or wireless transmission paths).
The user equipment according to an exemplary embodiment of the present invention includes: a processor (not shown) and a memory (not shown), wherein the memory stores a computer program which, when executed by the processor, implements the interference measurement method for a user equipment as described in the above exemplary embodiments.
Exemplary embodiments of the present invention provide a computer-readable storage medium storing a computer program which, when executed by a processor, implements the interference measurement method for a base station as described in the above exemplary embodiments. The computer readable storage medium is any data storage device that can store data which can be read by a computer system. Examples of computer-readable storage media include: read-only memory, random access memory, read-only optical disks, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the internet via wired or wireless transmission paths).
A base station according to an exemplary embodiment of the present invention includes: a processor (not shown) and a memory (not shown), wherein the memory stores a computer program which, when executed by the processor, implements the interference measurement method for a base station as described in the above exemplary embodiments.
Although a few exemplary embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims (20)

1. An interference measurement method for a user equipment, wherein the interference measurement method comprises:
receiving a downlink reference signal from a base station;
acquiring interference strength information of co-channel interference or self-interference of user equipment performing uplink transmission on a time-frequency resource where a received first type downlink reference signal is located to the current user equipment, or acquiring the information of the co-channel interference or the self-interference by a base station based on the received first type downlink reference signal;
reporting the acquired interference strength information or information for the base station to acquire the interference strength information to the base station,
wherein the first type of downlink reference signal is: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists.
2. The interference measurement method according to claim 1, wherein the step of obtaining the interference strength information based on the received downlink reference signals of the first category comprises:
subtracting the estimated first class of downlink reference signal portion from the received signal and determining the interference strength information based on the remaining signal portion;
or, determining the interference strength information based on a channel measurement obtained for the received downlink reference signal of the first category;
or, acquiring the interference strength information based on the received first category downlink reference signal and a second category downlink reference signal, where the second category downlink reference signal is: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
3. The interference measurement method according to claim 2, wherein the step of determining the interference strength information based on the remaining signal portion comprises: and using the average power value of the symbols corresponding to the remaining signal portions or the quantization level of the average power value as the interference strength information, wherein the downlink reference signal portion of the first category in the received signal is estimated by: estimating a downlink channel based on a received downlink reference signal of a first category, and reconstructing a downlink reference signal part of the first category in the received signal based on parameters of the estimated downlink channel;
and/or the step of determining the interference strength information based on the channel measurement obtained for the received downlink reference signal of the first category comprises: using a ratio between reference signal received power and a signal-to-interference-and-noise ratio of the received downlink reference signal of the first category or a quantization level of the ratio as the interference strength information;
and/or the step of acquiring the interference strength information based on the received first category downlink reference signals and second category downlink reference signals comprises: taking a difference value between the average power value of the symbol corresponding to the received first-class downlink reference signal and the average power value of the symbol corresponding to the received second-class downlink reference signal or a quantization level of the difference value as the interference strength information; or, taking a difference value between a channel measurement value obtained for the received downlink reference signal of the second category and a channel measurement value obtained for the received downlink reference signal of the first category or a quantization level of the difference value as the interference strength information, where the channel measurement value is: reference signal received quality or signal to interference plus noise ratio.
4. The interference measurement method according to claim 1, wherein the information for the base station to obtain the interference strength information comprises: channel measurement quantity is obtained according to the received downlink reference signals of the first category; or, a channel measurement obtained for the received downlink reference signal of the first category and a channel measurement obtained for the received downlink reference signal of the second category; or, the average power value of the received symbol corresponding to the first type of downlink reference signal and the average power value of the received symbol corresponding to the second type of downlink reference signal,
wherein the channel measurements comprise at least one of: reference signal received quality, signal to interference plus noise ratio, reference signal received power.
5. The interference measurement method according to any one of claims 1 to 4, wherein the interference measurement method further comprises: determining whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal,
wherein the downlink reference signals of the second category are: and the time frequency resource where the uplink reference signal is transmitted is not scheduled.
6. The interference measurement method of claim 5, wherein the step of determining whether the received downlink reference signal is a first category of downlink reference signals or a second category of downlink reference signals comprises:
determining whether the received downlink reference signal is a first category of downlink reference signal or a second category of downlink reference signal based on information received from a base station indicating a configuration mode of the downlink reference signal, a duration of the configuration mode, and a starting position of the configuration mode;
or determining whether the received downlink reference signal is a first category downlink reference signal or a second category downlink reference signal based on at least one of a frequency domain offset position, a spreading code, a scrambling code, and a reference signal type of the received downlink reference signal;
or determining whether the received downlink reference signal is a first type downlink reference signal or a second type downlink reference signal based on the type of the measurement quantity required to be reported by the received downlink reference signal,
the configuration mode of the downlink reference signals defines the number and the sequence of the first type of downlink reference signals and the second type of downlink reference signals in each period.
7. The interference measurement method of claim 1, wherein reporting the acquired interference strength information or information for the base station to acquire the interference strength information to the base station comprises: reporting the acquired interference strength information or the information used for the base station to acquire the interference strength information to the base station according to a specific mode so that the base station can determine the received interference strength information or the first type downlink reference signal corresponding to the information used for the base station to acquire the interference strength information;
and/or the step of acquiring the interference strength information or the information for the base station to acquire the interference strength information includes: and acquiring the interference strength information or the information for the base station to acquire the interference strength information based on the received multiple first-class downlink reference signals, wherein the user equipment performing uplink transmission on the time-frequency resources where the multiple first-class downlink reference signals are located is the same.
8. An interference measurement method for a base station, wherein the interference measurement method comprises:
sending a first type of downlink reference signal to at least one user equipment, wherein the first type of downlink reference signal is: a downlink reference signal of scheduled uplink transmission exists on the time frequency resource;
receiving, from the at least one user equipment, interference strength information reported for the downlink reference signal of the first category; or, acquiring interference strength information based on information, reported by the at least one user equipment for the first category of downlink reference signals, used for a base station to acquire the interference strength information;
the received or acquired interference strength information is taken as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
9. The interference measurement method of claim 8, wherein the interference measurement method further comprises: and scheduling uplink and downlink transmission of the user equipment on the same time-frequency resource based on the interference strength information of the user equipment on the co-channel interference of other user equipment and/or self-interference of the user equipment.
10. The interference measurement method of claim 8, wherein the interference measurement method further comprises: sending a downlink reference signal of a second category to the at least one user equipment, wherein the downlink reference signal of the second category is: there is no downlink reference signal of scheduled uplink transmission on the time frequency resource,
wherein, the step of obtaining the interference strength information comprises: obtaining the interference strength information based on information reported by the at least one user equipment for the first category of downlink reference signals and the second category of downlink reference signals respectively, or,
wherein the received interference strength information is obtained by the at least one user equipment based on the downlink reference signals of the first category and the downlink reference signals of the second category.
11. The interference measurement method of claim 10, wherein the step of obtaining interference strength information comprises:
regarding each of the at least one ue, respectively, using a difference value between the channel measurement quantity reported by each ue for the downlink reference signal of the second category and the channel measurement quantity reported for the downlink reference signal of the first category, or a quantization level of the difference value, as the interference strength information, where the channel measurement quantity is: reference signal received quality or signal to interference plus noise ratio;
or, regarding each of the at least one ue, respectively, using, as the interference strength information, a difference value between an average power value of a symbol corresponding to the downlink reference signal reported by each ue for the first category of downlink reference signals and an average power value of a symbol corresponding to the downlink reference signal reported for the second category of downlink reference signals, or a quantization level of the difference value.
12. The interference measurement method of claim 8 wherein the information for the base station to obtain interference strength information comprises: channel measurements obtained for the downlink reference signals of the first category;
and/or, the interference measurement method further comprises: and identifying the received interference strength information or the first type downlink reference signal corresponding to the information for the base station to acquire the interference strength information.
13. The interference measurement method of claim 12, wherein the step of obtaining interference strength information comprises:
and regarding each user equipment in the at least one user equipment, respectively, using a ratio between reference signal received power and signal-to-interference-and-noise ratio reported by each user equipment for the downlink reference signal of the first category or a quantization level of the ratio as the interference strength information.
14. The interference measurement method of claim 9, wherein the step of scheduling uplink and downlink transmissions of the user equipment on the same time-frequency resource comprises:
when determining that uplink transmission of one user equipment is scheduled on a time-frequency resource, scheduling downlink transmission of at least one user equipment which is subjected to co-channel interference or self-interference of the user equipment and meets a first preset condition on the time-frequency resource;
or when determining that downlink transmission of one user equipment is scheduled on a time-frequency resource, scheduling uplink transmission of at least one user equipment on the time-frequency resource, wherein the interference intensity information of co-channel interference or self-interference to the user equipment meets a second preset condition;
or, scheduling uplink and downlink transmission of a pair of user equipments or a single user equipment on the same time-frequency resource, wherein interference strength information of co-channel interference of one user equipment to another user equipment or self-interference of the single user equipment in the pair of user equipments meets a third preset condition.
15. The interference measurement method of claim 10,
the step of transmitting the first category of downlink reference signals and the second category of downlink reference signals to at least one user equipment includes: sending a first type of downlink reference signals and a second type of downlink reference signals to the at least one user equipment according to a specific configuration mode of the downlink reference signals, and sending information for indicating the specific configuration mode, the duration of the specific configuration mode, and the starting position of the specific configuration mode to the at least one user equipment, wherein the configuration mode of the downlink reference signals defines the number and the sequence of the first type of downlink reference signals and the second type of downlink reference signals in each period;
and/or the step of sending the first category downlink reference signals and the second category downlink reference signals to at least one user equipment comprises: sending a first type of downlink reference signal to the at least one user equipment according to the first frequency domain offset position, and sending a second type of downlink reference signal to the at least one user equipment according to the second frequency domain offset position;
and/or the step of sending the first category downlink reference signals and the second category downlink reference signals to at least one user equipment comprises: transmitting a first category of downlink reference signals to the at least one user equipment using a first spreading code or a first scrambling code, and transmitting a second category of downlink reference signals to the at least one user equipment using a second spreading code or a second scrambling code;
and/or the first type of downlink reference signal is a first reference signal type of downlink reference signal, and the second type of downlink reference signal is a second reference signal type of downlink reference signal;
and/or informing the at least one user equipment of the uplink channel measurement only for downlink reference signals of the second class.
16. A user equipment, wherein the user equipment comprises:
a receiving unit, configured to receive a downlink reference signal from a base station;
a processing unit, configured to obtain, based on a received first category downlink reference signal, interference strength information of co-channel interference or self-interference of a user equipment performing uplink transmission on a time-frequency resource where the received first category downlink reference signal is located to a current user equipment, or obtain, by a base station, information of the interference strength information of the co-channel interference or the self-interference;
a transmitting unit for reporting the acquired interference strength information or information for the base station to acquire the interference strength information to the base station,
wherein the first type of downlink reference signal is: and the time frequency resource on which the downlink reference signal of the scheduled uplink transmission exists.
17. A base station, wherein the base station comprises:
a sending unit, configured to send a first category of downlink reference signals to at least one user equipment, where the first category of downlink reference signals is: a downlink reference signal of scheduled uplink transmission exists on the time frequency resource;
a receiving unit, configured to receive, from the at least one ue, interference strength information reported for the first category of downlink reference signals or information used for a base station to obtain the interference strength information;
a processing unit, configured to, when receiving information for a base station to obtain interference strength information, obtain the interference strength information based on information, reported by the at least one ue for the first category of downlink reference signals, for the base station to obtain the interference strength information; and for using the received or acquired interference strength information as: and the interference strength information of the co-channel interference or self-interference of the user equipment performing uplink transmission on the time-frequency resource where the downlink reference signal of the first category is located to the at least one user equipment.
18. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the interference measurement method for a user equipment according to any one of claims 1 to 7 or the interference measurement method for a base station according to any one of claims 8 to 15.
19. A user equipment, wherein the user equipment comprises:
a processor;
memory storing a computer program which, when executed by a processor, implements an interference measurement method for a user equipment as claimed in any one of claims 1 to 7.
20. A base station, wherein the base station comprises:
a processor;
memory storing a computer program which, when executed by the processor, implements the interference measurement method for a base station according to any one of claims 8 to 15.
CN201910311687.3A 2019-04-18 2019-04-18 Interference measurement method and corresponding equipment Pending CN111835442A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201910311687.3A CN111835442A (en) 2019-04-18 2019-04-18 Interference measurement method and corresponding equipment
EP20790608.2A EP3931989A4 (en) 2019-04-18 2020-04-20 Method and apparatus for measuring interference, feeding back demodulation related information and scheduling terminals, channel switching, and interference processing
PCT/KR2020/005220 WO2020214007A1 (en) 2019-04-18 2020-04-20 Method and apparatus for measuring interference, feeding back demodulation related information and scheduling terminals, channel switching, and interference processing
US17/604,234 US20220216976A1 (en) 2019-04-18 2020-04-20 Method and apparatus for measuring interference, feeding back demodulation related information and scheduling terminals, channel switching, and interference processing

Applications Claiming Priority (1)

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CN201910311687.3A CN111835442A (en) 2019-04-18 2019-04-18 Interference measurement method and corresponding equipment

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023273055A1 (en) * 2021-06-29 2023-01-05 中国电信股份有限公司 Method for detecting interference signal, base station, terminal, and system
WO2023125575A1 (en) * 2021-12-28 2023-07-06 中兴通讯股份有限公司 Communication method, network device and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023273055A1 (en) * 2021-06-29 2023-01-05 中国电信股份有限公司 Method for detecting interference signal, base station, terminal, and system
WO2023125575A1 (en) * 2021-12-28 2023-07-06 中兴通讯股份有限公司 Communication method, network device and storage medium

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