CN106817707B - Method and device for detecting and assisting in detecting signal source in base station - Google Patents
Method and device for detecting and assisting in detecting signal source in base station Download PDFInfo
- Publication number
- CN106817707B CN106817707B CN201510859619.2A CN201510859619A CN106817707B CN 106817707 B CN106817707 B CN 106817707B CN 201510859619 A CN201510859619 A CN 201510859619A CN 106817707 B CN106817707 B CN 106817707B
- Authority
- CN
- China
- Prior art keywords
- source base
- base station
- base stations
- signal
- determining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method and a device for detecting and assisting in detecting a signal source in a base station, wherein the method for detecting the signal source comprises the following steps: receiving a sounding signal, wherein the sounding signal is transmitted by one or more source base stations in a joint manner, and a signal transmitted by each source base station is a GCL sequence with a length of N, and the GCL sequence has a root corresponding to the source base station; performing correlation detection on the detection signals by using a GCL sequence set to obtain correlation detection results; and determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the roots corresponding to the source base stations respectively. Using the principles of the present invention, a base station may determine which base stations signals from other base stations can be received by it, and thus determine which base stations may be interfered with.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and apparatus for detecting and assisting in detecting a signal source in a base station.
Background
In TD-LTE systems, due to the nature of time division duplexing, there may be interference caused by distant base stations. Although the TD-LTE system uses guard slots for interference cancellation, when the transmission delay of a distant base station is large, the interference caused by the guard slots cannot be cancelled. At present, no answer is provided for the problem of how to eliminate the interference caused by the interference generated by the remote base station. And if the base station is able to determine from which of the remote base stations information can be received, it is able to determine that those remote base stations have an interference impact on it. Therefore, how to locate the source of the received signal is a considerable problem.
Disclosure of Invention
The invention aims to provide a method and a device for detecting signal sources in a base station and a method and a device for assisting in detecting the signal sources in the base station.
According to an aspect of the present invention, there is provided a method for detecting a signal source in a base station, wherein the method includes:
-receiving a sounding signal, wherein the sounding signal is jointly transmitted by one or more source base stations, and the signal transmitted by each source base station is a GCL sequence with a length N, the GCL sequence having a root corresponding to the source base station;
-performing a correlation detection on the probe signal using a GCL sequence set to obtain a correlation detection result;
-determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the root corresponding to each source base station;
wherein the method further comprises:
-determining the length N of the GCL sequence;
-determining a root corresponding to each source base station;
-determining a set of GCL sequences.
According to another aspect of the present invention, there is provided an apparatus for detecting a signal source in a base station, wherein the apparatus includes:
-means for receiving a sounding reference signal, wherein the sounding reference signal is jointly transmitted by one or more source base stations, and the signal transmitted by each source base station is a GCL sequence with a length N and a root corresponding to the source base station;
-means for performing a correlation detection on the probe signals using a GCL sequence set to obtain correlation detection results;
-means for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the root to which each source base station corresponds;
wherein, the device still includes:
-means for determining the length N of the GCL sequence;
-means for determining a root to which each source base station corresponds;
-means for determining a set of GCL sequences.
According to another aspect of the present invention, there is provided a method in a base station for assisting in detecting a signal source, wherein the method comprises:
-transmitting a signal in a joint manner, the signal being a GCL sequence of length N having a root corresponding to the base station;
wherein the method further comprises:
-determining the length N of the GCL sequence;
-determining a root to which the base station corresponds.
According to another aspect of the present invention, an apparatus for assisting in detecting a signal source in a base station is provided, wherein the apparatus includes:
-means for transmitting a signal in a joint manner, said signal being a GCL sequence of length N having a root corresponding to said base station;
wherein the apparatus further comprises:
-means for determining the length N of the GCL sequence;
-means for determining a root to which the base station corresponds.
Compared with the prior art, the base station according to the present invention can transmit a signal, which is a GCL sequence having a root corresponding to the base station, through a joint transmission scheme. The base station according to the present invention can receive the above signals transmitted by other base stations and perform correlation detection on the signals, thereby determining the base station from which the signals originate. Using the principles of the present invention, a base station may determine which base stations signals from other base stations can be received by it, and thus determine which base stations may be interfered with.
Drawings
The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings, wherein like elements are represented by like reference numerals, which are given by way of illustration only, and thus are not intended to be limiting of the present invention, and wherein:
fig. 1 shows a flowchart of a method for detecting a signal source in a base station according to an exemplary embodiment of an aspect of the present invention;
fig. 2 shows a flow chart of a method for assisting in detecting a signal source in a base station according to an exemplary embodiment of another aspect of the present invention;
fig. 3 shows a schematic diagram of an apparatus for detecting a signal source in a base station according to an exemplary embodiment of another aspect of the present invention;
fig. 4 shows a schematic diagram of an apparatus for assisting in detecting a signal source in a base station according to an exemplary embodiment of another aspect of the present invention.
It should be noted that these drawings are intended to illustrate the general nature of the methods, structures, and/or materials utilized in certain exemplary embodiments, and to supplement the written description provided below. The drawings are not necessarily to scale and may not accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as defining or limiting the scope of the values or attributes encompassed by example embodiments. The use of similar or identical reference numbers in various figures is intended to indicate the presence of similar or identical elements or features.
Detailed Description
While the exemplary embodiments are susceptible to various modifications and alternative forms, certain embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intention to limit example embodiments to the specific forms disclosed, but on the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the claims. Like reference numerals refer to like elements throughout the description of the various figures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations as a sequential process, many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The term "wireless device" or "device" as used herein may be considered synonymous with and sometimes hereinafter referred to as: a client, user equipment, mobile station, mobile user, mobile terminal, subscriber, user, remote station, access terminal, receiver, mobile unit, etc., and may describe a remote user of wireless resources in a wireless communication network.
Similarly, the term "base station" as used herein may be considered synonymous with, and sometimes referred to hereinafter as: a node B, an evolved node B, an eNodeB, a Base Transceiver Station (BTS), an RNC, etc., and may describe a transceiver that communicates with and provides radio resources to a mobile in a wireless communication network that may span multiple technology generations. The base stations discussed herein may have all of the functionality associated with conventional well-known base stations, except for the ability to implement the methods discussed herein.
The methods discussed below, some of which are illustrated by flow diagrams, may be implemented by hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware or microcode, the program code or code segments to perform the necessary tasks may be stored in a machine or computer readable medium such as a storage medium. The processor(s) may perform the necessary tasks.
Specific structural and functional details disclosed herein are merely representative and are provided for purposes of describing example embodiments of the present invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements (e.g., "between" versus "directly between", "adjacent" versus "directly adjacent to", etc.) should be interpreted in a similar manner.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Portions of the exemplary embodiments and corresponding detailed description are presented in terms of software, or algorithms and symbolic representations of operations on data bits within a computer memory. These descriptions and representations are the ones by which those of ordinary skill in the art effectively convey the substance of their work to others of ordinary skill in the art. An algorithm, as the term is used here, and as it is used generally, is conceived to be a self-consistent sequence of steps leading to a desired result. The steps are those requiring physical manipulations of physical quantities. Usually, though not necessarily, these quantities take the form of optical, electrical, or magnetic signals capable of being stored, transferred, combined, compared, and otherwise manipulated. It has proven convenient at times, principally for reasons of common usage, to refer to these signals as bits, values, elements, symbols, characters, terms, numbers, or the like.
In the following description, the illustrative embodiments will be described with reference to acts and symbolic representations of operations (e.g., in the form of flowcharts) that can be implemented as program modules or functional processes including routines, programs, objects, components, data structures, etc., that perform particular tasks or implement particular abstract data types and that can be implemented using existing hardware at existing network elements. Such existing hardware may include one or more Central Processing Units (CPUs), Digital Signal Processors (DSPs), application specific integrated circuits, Field Programmable Gate Arrays (FPGAs) computers, and the like.
It should be recognized that all of these and similar terms are to be associated with the appropriate physical quantities and are merely convenient labels applied to these quantities. Unless specifically stated otherwise, or as is apparent from the discussion, terms such as "processing," "computing," "determining," or "displaying" or the like, refer to the action and processes of a computer system, or similar electronic computing device, that manipulates and transforms data represented as physical, electronic quantities within the computer system's registers and memories into other data similarly represented as physical quantities within the computer system memories or registers or other such information storage, transmission or display devices.
It should also be noted that the software implemented aspects of the exemplary embodiments are typically encoded on some form of program storage medium or implemented over some type of transmission medium. The program storage medium may be a magnetic (e.g., floppy disk or hard drive) or optical (e.g., compact disk read only memory or "CD ROM") storage medium, and may be a read only or random access storage medium. Similarly, the transmission medium may be twisted wire pairs, coaxial cable, optical fiber, or some other suitable transmission medium known to the art. The exemplary embodiments are not limited by these aspects of any given implementation.
The processor and memory may operate together to perform device functions. For example, the memory may store code segments relating to the functionality of the device. The code segments may in turn be executed by a processor. In addition, the memory may store processing variables and constants for use by the processor.
The present invention is described in further detail below with reference to the attached drawing figures.
Fig. 1 illustrates a flowchart of a method for detecting a signal source in a base station according to an embodiment of an aspect of the present invention.
The method of the present embodiment is implemented in a base station, for example, an eNodeB in a TD-LTE system. It will be understood by those skilled in the art that the base station descriptions herein are by way of example only and that other existing or future base stations, as may be suitable for use with the present invention, are also within the scope of the present invention and are hereby incorporated by reference.
In step S11, the bs receives a sounding reference signal, where the sounding reference signal is jointly transmitted by one or more source bss, and the signal transmitted by each source bs is a GCL sequence with a length N, and the GCL sequence has a root corresponding to the source bs.
Here, the source base station means a base station that transmits a signal. The source base station transmits signals on a downlink in a joint mode. Here, the transmission by the joint means that the respective source base stations transmit the signal in the same time slot.
In one embodiment, one or more source base stations transmitting signals may be designated by, for example, an OMC (Operation and Maintenance Center). For example, the OMC may designate several other base stations that are further away from the base station as source base stations.
The signal transmitted by each source base station is a GCL sequence of length N having a root corresponding to the source base station.
As known to those skilled in the art, a gcl (generalized Chirp like) sequence is an orthogonal sequence with good auto-correlation and cross-correlation properties. When two GCL sequences have different roots, the two GCL sequences have a small and constant cross-correlation value therebetween, and if the length of the GCL sequence is large enough, the receiving end can distinguish the two GCL sequences by correlation detection. And when the two GCL sequences have the same root but have the difference value of the cyclic shift values which is larger than the maximum path time delay, the two sequences are mutually orthogonal, so that a receiving end can still correctly distinguish the two GCL sequences through correlation detection.
In a preferred embodiment, the GCL sequence may be generated according to the following formula:
ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or
ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root of the GCL sequence.
In a preferred embodiment, the roots corresponding to the source base stations are different from each other.
In another embodiment, when the roots corresponding to two source base stations are the same, the difference between the cyclic shift values of the GCL sequences respectively transmitted by the two source base stations exceeds the maximum path delay.
When one or more source base stations respectively transmit the signals in a joint mode, correspondingly, the base station receives the detection signals on an uplink. It should be noted that not every signal transmitted by a source base station can be received by a base station. For example, if there is no weather phenomenon causing long-range interference, such as an atmospheric air guide, when the source base station is far away, the signal it sends will not be received by the base station, i.e. it will not cause far-end interference to the base station.
Next, in step S12, the base station performs correlation detection on the probe signal using the GCL sequence set to obtain a correlation detection result.
Here, before performing correlation detection, the base station will also determine the length N of the GCL sequence, determine the root corresponding to each source base station, and determine the GCL sequence set. For example, the base station may determine the length N of the GCL sequence and the root corresponding to each source base station in advance by communicating with the OMC. After the base station acquires the roots corresponding to the source base stations, the base station may locally generate GCL sequences according to the roots to form a GCL sequence set. Alternatively, the base station may also acquire each GCL sequence in advance through the OMC to form a GCL sequence set.
After the base station determines the length N of the GCL sequence, the root corresponding to each source base station, and the GCL sequence set, the base station may store the information for subsequent use. In addition, the base station may also update the length N of the GCL sequence, the root corresponding to each source base station, and the GCL sequence set in the manner described above at regular time or according to event triggering, etc.
And the base station calculates the correlation between each GCL sequence in the GCL sequence set and the received detection signal. When a peak value obtained by performing correlation calculation on the received probe signal using the GCL sequence having a specific root is greater than a certain threshold, the base station may determine that the GCL sequence having the specific root is received.
Since there may be a plurality of source base stations transmitting GCL sequences, when performing correlation detection, the base station may determine to receive a plurality of GCL sequences and determine the root corresponding to each GCL sequence.
Next, in step S13, the base station determines one or more source base stations that can receive the signal transmitted by the base station, based on the correlation detection result and the root corresponding to each of the source base stations.
In a preferred embodiment, the roots corresponding to the source base stations are different from each other. And the base station acquires each received GCL sequence and the root corresponding to each GCL sequence according to the correlation detection result. Then, the base station can determine the source base station from which the received GCL sequence comes from according to the root of each source base station, thereby determining that the signal transmitted by the base station can be received from the source base station. For example, the source base station A, B, C has roots u1, u2, and u3, respectively, and the base station determines that it can receive signals from the source base stations a and B if it knows that GCL sequences with roots u1 and u2 are received by the base station through correlation detection.
In another embodiment, the two source base stations have the same corresponding root, and the difference between the cyclic shift values of the GCL sequences respectively transmitted by the two source base stations exceeds the maximum path delay. Then, before performing the correlation detection, the base station should determine cyclic shift values corresponding to the two source base stations, respectively. For example, the base station may determine in advance cyclic shift values corresponding to the two source base stations by communicating with the OMC or the source base station. Then, when performing correlation detection, the base station performs correlation calculation on each GCL sequence in the GCL sequence set and the received probe signal. When a peak value obtained by performing correlation calculation on the received detection signal by using a GCL sequence having a specific root and a specific cyclic shift value is greater than a certain threshold value, the GCL sequence having the specific root and the specific cyclic shift value can be considered to be received. Then, the base station can determine the source base station from which the received GCL sequence comes from according to the correlation detection result, the root corresponding to each source base station, and the cyclic shift value corresponding to each source base station, and thus can determine that the signal transmitted by the base station can be received from the source base station. For example, the source base stations A, B each correspond to a root u, which has cyclic shift values x and y. When the base station learns that the received GCL sequence has the root of u and the cyclic shift values of x and y after performing correlation detection, the base station determines that signals can be received from the source base stations a and B.
In a preferred embodiment, in step S12, the base station first performs frequency synchronization on the probe signals, and then performs correlation detection on the probe signals subjected to frequency synchronization by using the GCL sequence set in the manner described above to obtain a correlation detection result. For example, when CFO (Carrier Frequency Offset) is large, the accuracy of the detection result is improved by performing Frequency synchronization on the sounding signal and then performing correlation detection.
In one embodiment, the base station may also determine interference information based on the one or more source base stations that are able to receive the signals it transmits. For example, when a base station determines that it can receive its transmitted signal from a particular source base station, it may determine that the particular source base station causes interference to the base station. For another example, when a base station determines that it can receive its transmitted signal from a particular source base station, the base station may analyze the strength of the signal received from the particular source base station to determine the amount of interference caused by the source base station. It will be appreciated by those skilled in the art that the associated descriptions herein for determining interference information are merely exemplary and not limiting descriptions, and that other various implementations exist without departing from the spirit or scope of the present invention and are incorporated herein by reference.
Fig. 2 shows a flow chart of a method for assisting in detecting a signal source in a base station according to an embodiment of another aspect of the invention.
The method of the present embodiment is implemented in a base station, for example, an eNodeB in a TD-LTE system. It will be understood by those skilled in the art that the base station descriptions herein are by way of example only and that other existing or future base stations, as may be suitable for use with the present invention, are also within the scope of the present invention and are hereby incorporated by reference.
In step S21, the base station transmits a signal, which is a GCL sequence of length N having a root corresponding to the base station, in a joint manner.
Since the properties of the GCL sequence have been described above, they are not described in detail here.
Before the base station sends signals, the base station determines the length N of the GCL sequence and determines the root corresponding to the base station. For example, a base station may communicate with the OMC to predetermine the length N of the GCL sequence and the root to which the base station corresponds. When the path delay is large, the length N of the GCL sequence should be large enough. For example, it can be set to 1023 according to an empirical value, and the length N of the GCL sequence can be adjusted according to the actual situation of the system.
The base station then transmits a GCL sequence of length N with a root corresponding to the base station in a joint manner.
In a preferred embodiment, the roots corresponding to the base stations are different from each other.
In another embodiment, if the roots of two base stations are the same, the two base stations will also determine the cyclic shift values corresponding to their base stations respectively. For example, the base station may determine in advance its own corresponding cyclic shift value by communicating with the OMC or other base stations. Then, the base station transmits a GCL sequence of length N having a root corresponding to the base station and the cyclic shift value in a joint manner.
In a preferred embodiment, the GCL sequence is generated according to the following formula:
ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or
ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root.
Fig. 3 shows a schematic diagram of an apparatus for detecting a signal source in a base station according to an embodiment of another aspect of the present invention.
The apparatus of the present embodiment is implemented in a base station, for example, an eNodeB in a TD-LTE system. It will be understood by those skilled in the art that the base station descriptions herein are by way of example only and that other existing or future base stations, as may be suitable for use with the present invention, are also within the scope of the present invention and are hereby incorporated by reference.
As shown in fig. 3, the apparatus for detecting signal source includes an apparatus 31 for receiving a probe signal, hereinafter referred to as a receiving apparatus 31; means 32 for performing a correlation detection on the probe signals using a GCL sequence set to obtain correlation detection results, hereinafter referred to as first detection means 32; and a device 33 for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the roots corresponding to the source base stations, which is hereinafter referred to as a first determining device 33. Furthermore, the means for detecting signals comprise means for determining the length N of the GCL sequence, hereinafter referred to as second determining means 34 (not shown); means for determining roots corresponding to the source base stations, hereinafter referred to as third determining means 35 (not shown); and means for determining a set of GCL sequences, hereinafter fourth determining means 36 (not shown).
First, the receiving device 31 receives a sounding reference signal, where the sounding reference signal is jointly transmitted by one or more source base stations, and a signal transmitted by each source base station is a GCL sequence with a length N, and the GCL sequence has a root corresponding to the source base station.
Here, the source base station means a base station that transmits a signal. The source base station transmits signals on a downlink in a joint mode. Here, the transmission by the joint means that the respective source base stations transmit the signal in the same time slot.
In one embodiment, one or more source base stations transmitting signals may be designated by, for example, an OMC (Operation and Maintenance Center). For example, the OMC may designate several other base stations that are further away from the base station as source base stations.
The signal transmitted by each source base station is a GCL sequence of length N having a root corresponding to the source base station.
As known to those skilled in the art, a gcl (generalized Chirp like) sequence is an orthogonal sequence with good auto-correlation and cross-correlation properties. When two GCL sequences have different roots, the two GCL sequences have a small and constant cross-correlation value therebetween, and if the length of the GCL sequence is large enough, the receiving end can distinguish the two GCL sequences by correlation detection. And when the two GCL sequences have the same root but have the difference value of the cyclic shift values which is larger than the maximum path time delay, the two sequences are mutually orthogonal, so that a receiving end can still correctly distinguish the two GCL sequences through correlation detection.
In a preferred embodiment, the GCL sequence may be generated according to the following formula:
ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or
ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root of the GCL sequence.
In a preferred embodiment, the roots corresponding to the source base stations are different from each other.
In another embodiment, when the roots corresponding to two source base stations are the same, the difference between the cyclic shift values of the GCL sequences respectively transmitted by the two source base stations exceeds the maximum path delay.
When one or more source base stations transmit the above signals separately in a joint manner, the receiving device 31 of the base station receives the sounding signal on the uplink accordingly. It should be noted that not every signal transmitted by a source base station can be received by the receiving means 31 of the base station. For example, if there is no weather phenomenon causing long-range interference, such as an atmospheric air guide, the signal it sends out will not be received by the receiving means 31 of the base station when the source base station is far away, i.e. it will not cause far-end interference to the base station.
Next, the first detecting device 32 performs correlation detection on the probe signal by using the GCL sequence set to obtain a correlation detection result.
Here, the first detecting means 32 further determines the length N of the GCL sequence before the correlation detection, the third determining means 35 further determines the root corresponding to each source base station, and the fourth determining means 36 further determines the GCL sequence set. For example, the second determining device 34 and the third determining device 35 may determine the length N of the GCL sequence and the root corresponding to each source base station in advance by communicating with the OMC. After the third determining device 35 obtains the roots respectively corresponding to the source base stations, the fourth determining device 36 may locally generate each GCL sequence according to each root to form a GCL sequence set. Alternatively, the fourth determining device 36 may also acquire each GCL sequence in advance through the OMC to form a GCL sequence set.
After the length N of the GCL sequence, the root corresponding to each source bs, and the GCL sequence set are determined, the apparatus for assisting in detecting the signal source may store the information for subsequent use. The second determining means 34, the third determining means 35 and the fourth determining means 36 can also update the length N of the GCL sequence, the root corresponding to each source base station and the GCL sequence set in the manner described above at regular time or according to event trigger.
The first detection means 32 performs a correlation calculation of each GCL sequence in the set of GCL sequences with the received probe signal. When the first detecting means 32 uses the GCL sequence with a specific root to perform correlation calculation on the received probe signal, and the obtained peak value is larger than a certain threshold, then the first detecting means 32 can determine that the GCL sequence with the specific root is received.
Since there may be a plurality of source base stations transmitting GCL sequences, the first detection device 32 may determine to receive a plurality of GCL sequences and determine the root corresponding to each GCL sequence when performing correlation detection.
Next, the first determining device 33 determines one or more source base stations that can receive the signals transmitted by the source base stations, based on the correlation detection result and the roots corresponding to the respective source base stations.
In a preferred embodiment, the roots corresponding to the source base stations are different from each other. The first determining means 33 knows the received GCL sequences and their respective roots from the correlation detection result. The first determining means 33 can then determine, from the root of each source base station, the source base station from which the received GCL sequence came, and thus the signal it transmitted, which can be received from that source base station. For example, the roots of the source base station A, B, C are u1, u2, and u3, respectively, and the first determining device 33 determines that signals can be received from the source base stations a and B if the first determining device 33 knows that GCL sequences with roots of u1 and u2 are received according to correlation detection.
In another embodiment, the two source base stations have the same corresponding root, and the difference between the cyclic shift values of the GCL sequences respectively transmitted by the two source base stations exceeds the maximum path delay. In this embodiment, the apparatus for detecting signal sources further includes a device for determining cyclic shift values corresponding to two source base stations, which will be referred to as fifth determining device 37 hereinafter (not shown) when the roots corresponding to the two source base stations are the same. Before the first detecting means 32 performs correlation detection, the fifth determining means 37 will also determine cyclic shift values corresponding to the two source base stations, respectively. For example, the fifth determining means 37 may determine in advance cyclic shift values corresponding to the two source base stations respectively by communicating with the OMC or the source base station. Next, when performing correlation detection, the first detection device 32 performs correlation calculation on each GCL sequence in the set of GCL sequences and the received probe signal. When the peak value obtained by the first detecting device 32 performing correlation calculation on the received probe signal by using the GCL sequence having the specific root and the specific cyclic shift value is greater than a certain threshold, the first detecting device 32 may consider that the GCL sequence having the specific root and the specific cyclic shift value is received. In this embodiment, the first determining device 33 includes a device for determining one or more source base stations capable of receiving the signals transmitted by the one or more source base stations according to the correlation detection result, the roots corresponding to the source base stations, and the cyclic shift values corresponding to the source base stations, and is hereinafter referred to as a sixth determining device 331 (not shown). The sixth determining means 331 can determine the source base station from which the received GCL sequence is received and can determine the signal transmitted by the source base station from which the received GCL sequence is received, based on the correlation detection result, the root corresponding to each source base station, and the cyclic shift value corresponding to each source base station. For example, the source base stations A, B each correspond to a root u, which has cyclic shift values x and y. When the first detecting device 32 performs correlation detection and then knows that the received GCL sequence has a root of u and cyclic shift values of x and y, the sixth determining device 331 determines that signals can be received from the source base stations a and B.
In a preferred embodiment, the means for detecting the signal source further comprises means for frequency synchronizing said probing signal, hereinafter referred to as synchronizing means 38 (not shown); and means for performing a correlation detection on said frequency synchronized probe signals using a GCL sequence set to obtain correlation detection results, hereinafter referred to as second detection means 39 (not shown).
The synchronization means 38 first frequency-synchronizes the probe signals, and then the second detection means 39 performs correlation detection on said frequency-synchronized probe signals using the GCL sequence set in the manner described above to obtain correlation detection results. For example, when CFO (Carrier Frequency Offset) is large, the accuracy of the detection result is improved by performing Frequency synchronization on the sounding signal and then performing correlation detection.
In one embodiment, the apparatus for detecting signal sources further includes means for determining interference information, hereinafter referred to as sixth determining means 39 (not shown), according to the one or more source base stations capable of receiving the signals transmitted by the source base stations. The sixth determining means 39 may determine interference information from the one or more source base stations that can receive the signal it transmits. For example, when the first detection means 33 determines that it is possible to receive a signal transmitted by it from a particular source base station, then the sixth determination means 39 may determine that the particular source base station causes interference to that base station. For another example, when the first detection device 33 determines that the signal transmitted by it can be received from a specific source base station, the sixth determination device 39 may analyze the strength of the signal received from the specific source base station to determine the magnitude of the interference caused by the source base station. It will be appreciated by those skilled in the art that the associated descriptions herein for determining interference information are merely exemplary and not limiting descriptions, and that other various implementations exist without departing from the spirit or scope of the present invention and are incorporated herein by reference.
Fig. 4 is a schematic diagram of an apparatus for assisting in detecting a signal source in a base station according to an embodiment of another aspect of the present invention.
The apparatus of the present embodiment is implemented in a base station, for example, an eNodeB in a TD-LTE system. It will be understood by those skilled in the art that the base station descriptions herein are by way of example only and that other existing or future base stations, as may be suitable for use with the present invention, are also within the scope of the present invention and are hereby incorporated by reference.
As shown in fig. 4, the apparatus for assisting in detecting the signal source includes an apparatus 41 for transmitting signals in a joint manner, hereinafter referred to as a transmitting apparatus 41.
The transmitter 41 transmits a signal, which is a GCL sequence of length N having a root corresponding to the base station, in a joint manner.
Transmitting by joint means that the base station transmits the above signals in the same time slot as the other base stations.
Since the properties of the GCL sequence have been described above, they are not described in detail here.
The means for assisting in detecting the signal origin further comprises means for determining the length N of the GCL sequence, hereinafter seventh determining means 42 (not shown); and means for determining a root corresponding to the base station, hereinafter referred to as eighth determining means 43 (not shown).
Before the transmitting device 41 transmits the signal, the seventh determining device 42 will determine the length N of the GCL sequence, and the eighth determining device 43 will determine the root corresponding to the base station. For example, the seventh determining device 42 and the eighth determining device 43 may communicate with the OMC to determine the length N of the GCL sequence and the root corresponding to the base station in advance. When the path delay is large, the length N of the GCL sequence should be large enough. For example, it can be set to 1023 according to an empirical value, and the length N of the GCL sequence can be adjusted according to the actual situation of the system.
The transmitting device 41 then transmits a GCL sequence of length N with a root corresponding to the base station in a joint manner.
In a preferred embodiment, the roots corresponding to the base stations are different from each other.
In another embodiment, the roots corresponding to the two base stations are the same. In this embodiment, the apparatus for assisting in detecting the signal source further includes a means for determining a cyclic shift value corresponding to the base station, hereinafter referred to as a ninth determining means 44 (not shown). For example, when the roots corresponding to two base stations are the same, the ninth determining devices 44 of the two base stations will also determine the cyclic shift values corresponding to their base stations, respectively. For example, the ninth determining means 44 may determine the cyclic shift value corresponding to the base station in advance by communicating with the OMC or other base station. Then, the transmitter 41 transmits a GCL sequence having a root corresponding to the base station and the cyclic shift value with a length N in a joint manner.
In a preferred embodiment, the GCL sequence is generated according to the following formula:
ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or
ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root.
It is noted that the present invention may be implemented in software and/or in a combination of software and hardware, for example, the various means of the invention may be implemented using Application Specific Integrated Circuits (ASICs) or any other similar hardware devices. In one embodiment, the software program of the present invention may be executed by a processor to implement the steps or functions described above. Also, the software programs (including associated data structures) of the present invention can be stored in a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. Further, some of the steps or functions of the present invention may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
While exemplary embodiments have been particularly shown and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the claims. The protection sought herein is as set forth in the claims below. These and other aspects of the various embodiments are specified in the following numbered clauses:
1. a method in a base station for detecting a source of a signal, wherein the method comprises:
-receiving a sounding signal, wherein the sounding signal is jointly transmitted by one or more source base stations, and the signal transmitted by each source base station is a GCL sequence with a length N, the GCL sequence having a root corresponding to the source base station;
-performing a correlation detection on the probe signal using a GCL sequence set to obtain a correlation detection result;
-determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the root corresponding to each source base station;
wherein the method further comprises:
-determining the length N of the GCL sequence;
-determining a root corresponding to each source base station;
-determining a set of GCL sequences.
2. The method according to clause 1, wherein the step of performing correlation detection on the probe signals using a GCL sequence set to obtain correlation detection results comprises:
-frequency synchronizing the probe signals;
-performing a correlation detection on the frequency synchronized probe signals using a GCL sequence set to obtain a correlation detection result.
3. The method according to clause 1 or 2, wherein the roots corresponding to the source base stations are different from each other.
4. The method according to clause 1 or 2, wherein, when the roots corresponding to two source base stations are the same, the difference between the cyclic shift values of the GCL sequences respectively sent by the two source base stations exceeds the maximum path delay;
wherein the step of determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the roots corresponding to the source base stations respectively comprises:
determining one or more source base stations capable of receiving the signals sent by the source base stations according to the correlation detection result, the roots corresponding to the source base stations respectively and the cyclic shift values corresponding to the source base stations respectively;
wherein the method further comprises:
when the roots corresponding to the two source base stations are the same, determining cyclic shift values corresponding to the two source base stations respectively.
5. The method of any of clauses 1-4, wherein the method further comprises:
-determining interference information from the one or more source base stations capable of receiving the signals it transmits.
6. The method of any of clauses 1-5, wherein the GCL sequence is generated according to the following formula:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root of the GCL sequence.
7. A method in a base station for assisting in detecting a source of a signal, wherein the method comprises:
-transmitting a signal in a joint manner, the signal being a GCL sequence of length N having a root corresponding to the base station;
wherein the method further comprises:
-determining the length N of the GCL sequence;
-determining a root to which the base station corresponds.
8. The method of clause 7, wherein when the base station is the same as the root corresponding to the other base station, the method further comprises:
-determining a cyclic shift value corresponding to the base station;
wherein the GCL sequence has a root corresponding to the base station and the cyclic shift value.
9. The method of clause 7 or 8, wherein the GCL sequence is generated according to the following formula:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root.
10. An apparatus for detecting a signal source in a base station, wherein the apparatus comprises:
-means for receiving a sounding reference signal, wherein the sounding reference signal is jointly transmitted by one or more source base stations, and the signal transmitted by each source base station is a GCL sequence with a length N and a root corresponding to the source base station;
-means for performing a correlation detection on the probe signals using a GCL sequence set to obtain correlation detection results;
-means for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the root to which each source base station corresponds;
wherein, the device still includes:
-means for determining the length N of the GCL sequence;
-means for determining a root to which each source base station corresponds;
-means for determining a set of GCL sequences.
11. The apparatus of clause 10, wherein the means for performing correlation detection on the probe signals using a GCL sequence set to obtain correlation detection results comprises:
-means for frequency synchronizing the probe signals;
-means for performing a correlation detection on the frequency synchronized probe signals using a GCL sequence set to obtain a correlation detection result.
12. The apparatus according to clause 10 or 11, wherein the roots corresponding to the source base stations are different from each other.
13. The apparatus according to clause 10 or 11, wherein when the roots corresponding to two source base stations are the same, a difference between cyclic shift values of GCL sequences respectively transmitted by the two source base stations exceeds a maximum path delay;
wherein the apparatus for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the roots corresponding to the source base stations respectively comprises:
means for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result, the roots corresponding to the source base stations, and the cyclic shift values corresponding to the source base stations;
wherein the apparatus further comprises:
-means for determining cyclic shift values corresponding to two source base stations, respectively, when the roots corresponding to the two source base stations are the same.
14. The apparatus of any of clauses 10-13, wherein the apparatus further comprises:
-means for determining interference information from the one or more source base stations capable of receiving the signals it transmits.
15. The apparatus of any of clauses 10-14, wherein the GCL sequence is generated according to the following equation:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root of the GCL sequence.
16. An apparatus in a base station for assisting in detecting a source of a signal, wherein the apparatus comprises:
-means for transmitting a signal in a joint manner, said signal being a GCL sequence of length N having a root corresponding to said base station;
wherein the apparatus further comprises:
-means for determining the length N of the GCL sequence;
-means for determining a root to which the base station corresponds.
17. The apparatus of clause 16, wherein when the base station is the same as the root corresponding to the other base station, the apparatus further comprises:
-means for determining a cyclic shift value corresponding to the base station;
wherein the GCL sequence has a root corresponding to the base station and the cyclic shift value.
18. The apparatus of clause 16 or 17, wherein the GCL sequence is generated according to the following equation:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root.
Claims (12)
1. A method in a base station for detecting a source of a signal, wherein the method comprises:
-receiving a sounding reference signal, wherein the sounding reference signal is jointly transmitted by a plurality of source base stations, and the signal transmitted by each source base station is a GCL sequence with a length N and a root corresponding to the source base station, wherein jointly transmitting means that the sounding reference signal is transmitted by the source base stations in the same time slot;
-performing a correlation detection on the probe signal using a GCL sequence set to obtain a correlation detection result;
-determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the root corresponding to each source base station;
wherein the method further comprises:
-determining the length N of the GCL sequence;
-determining a root corresponding to each source base station;
-determining a set of GCL sequences;
when the roots corresponding to the two source base stations are the same, the difference value of the cyclic shift values of the GCL sequences respectively sent by the two source base stations exceeds the maximum path delay; the method also comprises the steps of determining cyclic shift values respectively corresponding to the two source base stations;
wherein, the determining one or more source base stations capable of receiving the signals sent by the source base stations according to the correlation detection result and the roots corresponding to the source base stations respectively comprises:
determining one or more source base stations capable of receiving the signals sent by the source base stations according to the correlation detection result, the roots corresponding to the source base stations respectively and the cyclic shift values corresponding to the source base stations respectively; wherein, when a peak value obtained by performing correlation calculation on the received detection signal by using the GCL sequence with a specific root and a specific cyclic shift value is larger than a certain threshold value, the GCL sequence with the specific root and the specific cyclic shift value is considered to be received.
2. The method of claim 1, wherein the roots of the source base stations are different from each other.
3. The method according to claim 1 or 2, wherein the method further comprises:
-determining interference information from the one or more source base stations capable of receiving the signals it transmits.
4. The method of claim 1 or 2, wherein the GCL sequence is generated according to the following formula:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root of the GCL sequence.
5. A method in a source base station for assisting in detecting a source of a signal, wherein the method comprises:
-transmitting a signal in a joint manner, wherein the signal is a GCL sequence with a length N and the GCL sequence has a root corresponding to the source base station, and wherein the transmission in the joint manner means that a plurality of source base stations transmit the signal in the same time slot, and a base station receiving the signal performs correlation detection on the signal by using a GCL sequence set to obtain a correlation detection result, and determines one or more source base stations capable of receiving the signal transmitted by the base station according to the correlation detection result and the roots corresponding to the source base stations respectively;
wherein the method further comprises:
-determining the length N of the GCL sequence;
-determining a root to which the source base station corresponds;
wherein when the source base station is the same as the root corresponding to the other source base station, the method further comprises:
-determining a cyclic shift value corresponding to the source base station;
wherein the GCL sequence has a root corresponding to the source base station and the cyclic shift value.
6. The method of claim 5, wherein the GCL sequence is generated according to the following formula:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root.
7. An apparatus for detecting a signal source in a base station, wherein the apparatus comprises:
-means for receiving a sounding reference signal, wherein the sounding reference signal is transmitted by a plurality of source base stations in a joint manner, and the signal transmitted by each source base station is a GCL sequence with a length N and a root corresponding to the source base station, wherein the transmission in the joint manner means that the sounding reference signal is transmitted by the source base stations in the same time slot;
-means for performing a correlation detection on the probe signals using a GCL sequence set to obtain correlation detection results;
-means for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the root to which each source base station corresponds;
wherein the apparatus further comprises:
-means for determining the length N of the GCL sequence;
-means for determining a root to which each source base station corresponds;
-means for determining a set of GCL sequences;
when the roots corresponding to the two source base stations are the same, the difference value of the cyclic shift values of the GCL sequences respectively sent by the two source base stations exceeds the maximum path delay; the apparatus further comprises means for determining cyclic shift values corresponding to the two source base stations, respectively;
wherein the apparatus for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result and the roots corresponding to the source base stations respectively comprises:
means for determining one or more source base stations capable of receiving the signals transmitted by the source base stations according to the correlation detection result, the roots corresponding to the source base stations, and the cyclic shift values corresponding to the source base stations; wherein, when a peak value obtained by performing correlation calculation on the received detection signal by using the GCL sequence with a specific root and a specific cyclic shift value is larger than a certain threshold value, the GCL sequence with the specific root and the specific cyclic shift value is considered to be received.
8. The apparatus of claim 7, wherein the roots corresponding to the source base stations are different from each other.
9. The apparatus of claim 7 or 8, wherein the apparatus further comprises:
-means for determining interference information from the one or more source base stations capable of receiving the signals it transmits.
10. The apparatus of claim 7 or 8, wherein the GCL sequence is generated according to the following equation:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root of the GCL sequence.
11. An apparatus in a source base station for assisting in detecting a source of a signal, wherein the apparatus comprises:
-means for jointly transmitting a signal, which is a GCL sequence of length N and has a root corresponding to the source base station, wherein jointly transmitting means that a plurality of source base stations transmit the signal in the same time slot, wherein a base station receiving the signal performs correlation detection on the signal by using a GCL sequence set to obtain a correlation detection result, and determines one or more source base stations capable of receiving the signal transmitted by the base station according to the correlation detection result and the roots corresponding to the source base stations, respectively;
wherein the apparatus further comprises:
-means for determining the length N of the GCL sequence;
-means for determining a root to which the source base station corresponds;
wherein, when the source base station has the same root as the corresponding root of other source base stations, the apparatus further comprises:
-means for determining a cyclic shift value corresponding to the source base station;
wherein the GCL sequence has a root corresponding to the source base station and the cyclic shift value.
12. The apparatus of claim 11, wherein the GCL sequence is generated according to the following equation:
-ak＝e-jπuk·k/Nwherein k is 0, …, N-1, N is an even number,
or ak＝e-jπuk·(k+1)/NWherein k is 0, …, N-1, N is an odd number,
wherein u is the root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510859619.2A CN106817707B (en) | 2015-11-30 | 2015-11-30 | Method and device for detecting and assisting in detecting signal source in base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510859619.2A CN106817707B (en) | 2015-11-30 | 2015-11-30 | Method and device for detecting and assisting in detecting signal source in base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106817707A CN106817707A (en) | 2017-06-09 |
| CN106817707B true CN106817707B (en) | 2021-02-23 |
Family
ID=59156654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510859619.2A Active CN106817707B (en) | 2015-11-30 | 2015-11-30 | Method and device for detecting and assisting in detecting signal source in base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106817707B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971380B (en) * | 2018-09-28 | 2022-06-03 | 海信集团有限公司 | Remote interference management method and network side equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070237113A1 (en) * | 2006-04-03 | 2007-10-11 | Motorola, Inc. | Method and apparatus for fast cell search |
| CN101128004B (en) * | 2006-08-18 | 2010-10-27 | 华为技术有限公司 | Detection method, terminal and network device for random access |
| KR101473159B1 (en) * | 2006-09-29 | 2014-12-15 | 파나소닉 주식회사 | Communication apparatus and communication method |
| US8320360B2 (en) * | 2006-11-06 | 2012-11-27 | Motorola Mobility Llc | Method and apparatus for fast cell search |
| CN101325426A (en) * | 2007-06-11 | 2008-12-17 | 财团法人工业技术研究院 | sequence generation method |
| CN101888636B (en) * | 2009-05-14 | 2013-10-02 | 电信科学技术研究院 | Configuration and detection method of downlink measurement pilot frequency, and device |
| CN102217361B (en) * | 2011-05-31 | 2014-09-17 | 华为技术有限公司 | Method for detecting interference between base stations and base station |
| CN103037429B (en) * | 2012-12-07 | 2015-10-28 | 同济大学 | A kind of interference detection method of TD-LTE system |
-
2015
- 2015-11-30 CN CN201510859619.2A patent/CN106817707B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106817707A (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8374633B2 (en) | Muting indication to enable improved time difference of arrival measurements | |
| US10554467B2 (en) | Signal sending apparatus, signal detection apparatus, signal sending and detection system, signal sending method, and signal detection method | |
| CN107820273B (en) | A method and device for detecting synchronization signal of sidelink in D2D | |
| CN109152005B (en) | Uplink beam indication method, UE, base station and storage medium | |
| CN113632549A (en) | Wireless location measurement | |
| MX2019011339A (en) | Method and device for transmitting uplink demodulation reference signal. | |
| US20210184750A1 (en) | Beam management | |
| US20230164605A1 (en) | Methods, terminal device, network devices and apparatuses for interference measurement | |
| EP4250620A3 (en) | Method and apparatus for reporting channel state information (csi) | |
| WO2018064909A1 (en) | Method and device for positioning interference source cell and corresponding base station | |
| CN110351682B (en) | Communication equipment positioning method and related equipment | |
| WO2018075467A1 (en) | System and method for preamble sequence transmission and reception to control network traffic | |
| US10158446B2 (en) | Transmitting and receiving devices in cellular system | |
| CN107466054A (en) | Disturb localization method, device and the base station of cell-of-origin | |
| CN105306127B (en) | Mobile communication timing estimation method and device | |
| CN105723783B (en) | Synchronization signal sending device, reception device and method and system | |
| US10555289B2 (en) | Methods for transmitting data between a terminal and a frequency-synchronized access network on an uplink message from said terminal | |
| CN106817707B (en) | Method and device for detecting and assisting in detecting signal source in base station | |
| CN110662263B (en) | Apparatus and method for transmitting secure ranging packets with phase tracking | |
| KR20170020001A (en) | Apparatus and method for transmitting and receiving signal in communication system | |
| EP3138222A1 (en) | Link-fault tolerance in a distributed antenna system | |
| CN113302867B (en) | Common signal structure for multiple parameter sets | |
| CN110460363B (en) | Apparatus and method for flexible and safe time-of-flight measurement | |
| EP4243523A3 (en) | Method and user equipement for reference symbol transmission | |
| CN107113752B (en) | Method and device for indicating period of synchronous signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201206 ningqiao Road, Pudong New Area China (Shanghai) free trade test area, Pudong New Area, Shanghai Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 388 Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |