CN106921993B - Shielding method and device of wireless communication system - Google Patents
Shielding method and device of wireless communication system Download PDFInfo
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- CN106921993B CN106921993B CN201710067925.1A CN201710067925A CN106921993B CN 106921993 B CN106921993 B CN 106921993B CN 201710067925 A CN201710067925 A CN 201710067925A CN 106921993 B CN106921993 B CN 106921993B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
Abstract
The embodiment of the invention relates to the field of communication, in particular to a shielding method and a shielding device of a wireless communication system, which are used for interfering the time-frequency position occupied by a reference pilot signal of a downlink subframe. In the embodiment of the invention, the configuration information of the cell to be shielded is obtained through air interface interception, and the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power; determining a time-frequency position occupied by a reference pilot signal of a cell to be shielded according to frame timing and time slot timing; generating a same frequency interference signal according to the frequency point and the receiving power of the cell; and loading the same-frequency interference signal to the time-frequency position occupied by the reference pilot signal, so that the shielding system loads the interference signal at the time-frequency position occupied by the reference pilot signal of the downlink subframe.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a shielding method and a shielding device for a wireless communication system.
Background
With the development of science and technology, terminals such as mobile phones and the like become indispensable important tools in work and daily life of people, and great convenience is brought to people. Meanwhile, terminals such as mobile phones and the like also generate some considerable potential safety hazards, for example, in some special occasions such as secret conference rooms, examination rooms, defense information departments and the like, the terminals such as the mobile phones and the like are not expected to communicate, namely, communication signals of the terminals such as the mobile phones and the like need to be shielded, and the connection between a base station and the terminals such as the mobile phones and the like is cut off, so that any communication tool and receiving equipment in the special occasions cannot communicate.
In the prior art, a communication service in a shielded area is cut off, and shielding is performed by adopting a shielding device to transmit an interference signal. The cost is higher and the cost is higher when the communication service is cut off; the method of sending the interference signal is relatively good, but usually interferes with the network signal of a specific frequency band, a user cannot receive the signal and cannot send out the signal, and the problem of overlarge power consumption exists.
In summary, the shielding method adopted in the prior art has the problems of high cost, excessive cost and excessive power consumption, and therefore, an effective shielding method is required to be provided, which can achieve the purposes of shielding and reducing energy consumption and cost.
Disclosure of Invention
The embodiment of the invention provides a shielding method and a shielding device of a wireless communication system, which are used for solving the problems of higher cost, overlarge cost and overlarge power consumption of the shielding method in the prior art.
The embodiment of the invention provides a shielding method of a wireless communication system, which comprises the following steps:
acquiring configuration information of a cell to be shielded through air interface interception, wherein the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power;
determining a time-frequency position occupied by a reference pilot signal of a cell to be shielded according to frame timing and time slot timing;
generating a same frequency interference signal according to the frequency point and the receiving power of the cell;
and loading the co-channel interference signal to a time-frequency position occupied by the reference pilot signal.
Optionally, obtaining configuration information of the cell to be masked through air interface listening includes:
and carrying out full-band cell search and cell synchronization through air interface interception.
Optionally, before loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the method further includes:
determining the demodulation signal-to-interference ratio (SIR) requirement of a cell to be shielded according to air interface interception;
and adjusting the power of the co-channel interference signal according to the requirement of the demodulation signal-to-interference ratio (SIR).
Optionally, before loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the method further includes:
determining the size of a region of a cell to be shielded;
and adjusting the power of the same-frequency interference signal according to the area size of the cell to be shielded.
Optionally, the co-channel interfering signal is random noise or a pseudo-random PN code.
An embodiment of the present invention further provides a shielding apparatus for a wireless communication system, including:
an obtaining unit: the method comprises the steps that configuration information of a cell to be shielded is obtained through air interface interception, and the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power;
a determination unit: the time-frequency position occupied by the reference pilot signal of the cell to be shielded is determined according to the frame timing and the time slot timing;
a generation unit: the system is used for generating a same frequency interference signal according to the cell frequency point and the receiving power;
a loading unit: and the method is used for loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal.
Optionally, the obtaining unit is specifically configured to:
and carrying out full-band cell search and cell synchronization through air interface interception.
Optionally, the loading unit is further configured to:
determining the demodulation signal-to-interference ratio (SIR) requirement of a cell to be shielded according to air interface interception;
and adjusting the power of the co-channel interference signal according to the requirement of the demodulation signal-to-interference ratio (SIR).
Optionally, the loading unit is further configured to:
determining the size of a region of a cell to be shielded;
and adjusting the power of the same-frequency interference signal according to the area size of the cell to be shielded.
Optionally, the co-channel interfering signal is random noise or a pseudo-random PN code.
The embodiment of the invention provides a shielding method and a shielding device of a wireless communication system, which are used for acquiring configuration information of a cell to be shielded through air interface interception, wherein the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power; determining a time-frequency position occupied by a reference pilot signal of a cell to be shielded according to frame timing and time slot timing; generating a same frequency interference signal according to the frequency point and the receiving power of the cell; and loading the co-channel interference signal to a time-frequency position occupied by the reference pilot signal. In the embodiment of the invention, the frequency point, the frame timing, the time slot timing and the receiving power information of the cell to be shielded are obtained through air interface interception; determining a to-be-shielded time-frequency position of a to-be-shielded cell according to the frame timing and the time slot timing; generating a same frequency interference signal according to the frequency point and the receiving power of the cell; the same frequency interference signal is loaded to the time frequency position to be shielded, namely, the same frequency interference signal is only loaded to the time frequency position occupied by the reference pilot signal of the cell to be shielded, but not the same frequency interference signal is loaded to the whole time slot of the downlink subframe of the cell to be shielded, so that the problems of high cost and high energy consumption caused by the shielding method in the prior art are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below.
Fig. 1 is a frame structure diagram of an LTE communication system according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating a shielding method of a wireless communication system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a downlink timeslot structure of an LTE communication system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a shielding apparatus of a wireless communication system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be understood that the technical solution of the embodiment of the present invention can be applied to any wireless communication system of 2G (Second Generation), 3G (Third Generation), and 4G (Fourth Generation) systems under the wireless communication system. The embodiment of the invention takes an LTE (Long Term Evolution) communication system in a 4G wireless communication system as an example.
For better understanding of the present solution, first, a frame structure of an LTE communication system closely related to the present invention is introduced, and fig. 1 exemplarily shows a frame structure schematic diagram of a TDD-LTE communication system provided by an embodiment of the present invention, as shown in fig. 1, each radio frame of the TDD-LTE communication system is 10ms long, each radio frame is divided into two half-frames of 5ms, each half-frame includes 5 subframes of 1ms, each subframe includes two time slots, each time slot is 0.5ms long, where a 1 st frame, i.e., subframe # 0, is a fixed downlink subframe; frame 2 and frame 7 are special subframes, and include DwPTS (Downlink Pilot Time Slot), GP (Gap Protect), UpPTS (Uplink Pilot Time Slot); subframe # 2, which is the 3 rd frame, is a fixed uplink subframe, and similarly, in fig. 1, subframe #3, subframe #5, and subframe #8 are fixed downlink subframes, and subframe #4, subframe #7, and subframe #9 are fixed uplink subframes. The TDD-LTE communication system is suitable for uplink and downlink symmetric and asymmetric service modes by flexibly configuring the number of uplink and downlink subframes, and the uplink and downlink subframes are separated by a switching point.
Fig. 2 is a schematic flow chart illustrating a shielding method of a wireless communication system according to an embodiment of the present invention, as shown in fig. 2, including the following steps:
step S101: acquiring configuration information of a cell to be shielded through air interface interception, wherein the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power;
step S102: determining a time-frequency position occupied by a reference pilot signal of a cell to be shielded according to frame timing and time slot timing;
step S103: generating a same frequency interference signal according to the frequency point and the receiving power of the cell;
step S104: and loading the co-channel interference signal to a time-frequency position occupied by the reference pilot signal.
In step S101, configuration information of a cell to be shielded is obtained through air interface sensing, where the configuration information includes a cell frequency point, a frame timing, a time slot timing, and a received power, specifically, a cell of a full frequency band is sensed through an air interface, and more specifically, a carrier of the full frequency band cell is sensed through the air interface sensing to obtain the configuration information of the cell to be shielded, where the configuration information includes not only the cell frequency point, the frame timing, the time slot timing, and the received power information, but also a cell ID (Identifier), antenna information, CP (Cyclic Prefix) information, information of an uplink and downlink switching point, and the like. The interception is not limited to air interface interception, and other interception methods may be used as long as the configuration information of the cell of the wireless communication system in the shielding range can be obtained, where the purpose of interception is to obtain the cell configuration information of the cell of the wireless communication system in the shielding range. Wherein, the shielding range refers to the coverage range of the signal shielding system capable of realizing signal shielding. In specific implementation, for different wireless communication systems, since the frequency band, system, power, channel and other specific system parameters are different, for example, regarding the frequency band: the specific monitored signal frequency band may include 869-894 MHz, 825-960 MHz, 1805-1880 MHz and the like, and more specifically, for example, for a GSM900(Global System for Mobile Communication) System, the downlink frequency band ranges include 935-954 MHz and 954-960 MHz; for a CDMA (Code Division Multiple Access) system, the downlink frequency range is 870-880 MHz; for a WCDMA (Wideband Code Division Multiple Access) system, the downlink frequency range is 2130-2145 MHz, so the specific process for implementing interception is different. Although the specific interception process is different, the specific interception process can be realized through a cell search process in a corresponding wireless communication system, the whole frequency band of a cell under the wireless communication system possibly existing in a shielding range is searched, downlink synchronization is carried out on the searched cell, and cell configuration information of the cell under the wireless communication system possibly existing is obtained. By monitoring the obtained information of frequency point, ID, frame timing, time slot timing, uplink and downlink switching point, etc., of the cell to be shielded, the time interval for transmitting the co-channel interference signal can be determined. Thereby determining the transmission time period for transmitting the co-channel interference signals to the cell to be shielded by the shielding system.
In step S102, a time-frequency position occupied by a reference pilot signal of the cell to be shielded is determined according to the frame timing and the time slot timing, and specifically, a downlink time-frequency position to be shielded of the cell to be shielded can be determined according to the frame timing and the time slot timing information obtained by the listening, where the time-frequency position to be shielded is the time-frequency position occupied by the reference pilot signal. According to the searched frame timing and time slot timing information of the cell to be shielded, the downlink time-frequency position to be shielded of the cell to be shielded can be determined, so that the shielding system can pertinently transmit the same-frequency interference signal according to the determined downlink time-frequency position to be shielded of the cell to be shielded, the efficiency can be improved, and the resource can be saved.
In step S103, co-channel interference signals are generated according to the cell frequency points and the received power, and in specific implementation, for example, the cell frequency points of the GSM900 system are all frequency points included in the downlink frequency band range thereof, and the cell frequency points of the GSM1800 system are all frequency points included in the downlink frequency band range thereof. According to the frequency point and the receiving power of the searched cell, the same frequency interference signal can be generated. The co-channel interference signal is simply interference between channels in the same frequency band, and more specifically, the co-channel interference signal is interference caused by a receiver that receives the co-channel useful signal, where a carrier frequency of the non-useful signal is the same as a carrier frequency of the useful signal.
In step S104, the same frequency interference signal is loaded to the time frequency position occupied by the reference pilot signal. Specifically, the generated co-channel interference signal is loaded to a time-frequency position of the cell to be shielded, and more specifically, the co-channel interference signal is loaded to a time-frequency position occupied by a reference pilot signal of the cell to be shielded. For better explaining the method, fig. 3 exemplarily shows a schematic diagram of a downlink timeslot structure of an LTE communication system, as shown in fig. 3, two downlink timeslots are included, each timeslot includes 7 symbols, where l ═ 0 represents the first symbol of the downlink timeslot, and so on. In specific implementation, the loaded co-channel interference signal may be any signal unrelated to the downlink channel of the cell to be shielded, the co-channel interference signal is loaded to the first symbol and the fifth symbol position in one downlink time slot in fig. 3, the co-channel interference signal is controlled to be transmitted in the time slot, and other time slots may be closed, so that the co-channel interference signal does not need to be transmitted in the whole time slot position, and only the co-channel interference signal needs to be loaded and transmitted in the symbol position occupied by the reference pilot signal of the downlink time slot, which can effectively save energy and reduce cost. After loading the same frequency interference signal to the time frequency position of the downlink time slot of the cell to be shielded, then transmitting any signal which is not associated with the downlink channel in the time domain to cause the same frequency interference, so that the terminal in the cell to be shielded can not demodulate and analyze the shielded signal, thereby achieving the purpose of shielding the communication signal of each terminal in the cell to be shielded.
Optionally, obtaining configuration information of the cell to be masked through air interface listening includes: and carrying out full-band cell search and cell synchronization through air interface interception. Specifically, the air interface listening searches a possibly existing full-band cell, and performs downlink synchronization with the searched cell to be shielded to obtain the configuration information of the searched cell to be shielded. Only if the configuration information of the cell to be shielded is obtained, the shielding system can synchronize the configuration information to the corresponding position of the downlink subframe, and further the time period of the shielding system for transmitting the co-channel interference signal can be determined.
In the technical scheme of the invention, before the shielding system loads the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the size of the co-channel interference signal can be adjusted by any one of the following two ways to adapt to the range size of the cell to be shielded:
mode 1: optionally, before loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the method further includes: determining the demodulation SIR (Signal-to-Interference ratio) requirement of a cell to be shielded according to air interface interception; and adjusting the power of the co-channel interference signal according to the demodulation SIR requirement. In a specific implementation, the demodulation SIR requirement is that the subframe of the wireless communication system that is masked cannot be used for channel estimation or demodulation.
Mode 2: optionally, before loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the method further includes: determining the size of a region of a cell to be shielded; and adjusting the power of the same-frequency interference signal according to the area size of the cell to be shielded. In specific implementation, before loading the co-frequency interference signal to the time-frequency position of the time slot to be shielded, the power of the co-frequency interference signal can be adjusted in a configurable manner through real-time survey and test and power parameterization of a wireless communication system, wherein the power is enhanced and reduced, and the co-frequency interference signal after power adjustment is loaded to the time-frequency position of the time slot to be shielded. For example, a signal of a whole room with a large space is shielded, and because the room space is large, the loaded same-frequency interference signal does not cover the whole room completely, a shielding blind area exists; for another example, because the coverage of the co-channel interference signal exceeds the shielding range to be shielded, this situation may occur that the signal in a part of the non-shielding region is shielded. Therefore, before loading the co-channel interference signal to the time-frequency position of the time slot to be shielded, the power of the co-channel interference signal needs to be adjusted according to the area size of the cell to be shielded, so as to more effectively shield the communication signal of the cell to be shielded. The size of the co-channel interference signal to be loaded is adaptively adjusted according to the size of the range of the cell to be shielded, so that the shielding blind area and the adverse effect on the coverage of the non-shielding public area can be avoided.
In specific implementation, in addition to the two ways of adjusting the size of the co-channel interference signal to adapt to the range size of the cell to be shielded, power estimation can be performed on the time-frequency position occupied by the reference pilot signal of the cell to be shielded, and the power of the co-channel interference signal can be adjusted according to the time-frequency position occupied by the reference pilot signal of the cell to be shielded after power estimation and the demodulation SIR requirement, so that the size of the co-channel interference signal to be loaded can be adaptively adjusted according to the size of the range of the cell to be shielded, and the shielding blind area and the adverse effect caused by the coverage of the non-shielded public area can also be avoided.
In summary, in the above embodiment, the size of the co-channel interference signal can be adjusted according to any one of three ways to adapt to the range size of the cell to be shielded: 1. adjusting the size of the same frequency interference signal according to the demodulation SIR requirement of the cell to be shielded determined by air interface interception to adapt to the range size of the cell to be shielded; 2. adjusting the size of the same frequency interference signal according to the area size of the cell to be shielded so as to adapt to the range size of the cell to be shielded; 3. and adjusting the size of the co-channel interference signal according to the time-frequency position occupied by the reference pilot signal of the cell to be shielded after the power is estimated and the demodulation SIR requirement so as to adapt to the range size of the cell to be shielded. It is obvious from the above three ways that the way of adjusting the size of the co-channel interference signal to adapt to the range size of the cell to be shielded has the characteristics of diversity and flexibility.
Optionally, the co-channel interfering signal is random noise or a pseudo-random PN code. In specific implementation, the co-channel interference signal may be, for example, random Noise, or PN (Pseudo Noise) code.
Based on the same conception, the shielding apparatus of the wireless communication system provided by the embodiment of the present invention, as shown in fig. 4, includes an obtaining unit 201, a determining unit 202, a generating unit 203, and a loading unit 204. Wherein:
the obtaining unit 201: the method comprises the steps that configuration information of a cell to be shielded is obtained through air interface interception, and the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power;
the determination unit 202: the time-frequency position occupied by the reference pilot signal of the cell to be shielded is determined according to the frame timing and the time slot timing;
the generation unit 203: the system is used for generating a same frequency interference signal according to the cell frequency point and the receiving power;
the loading unit 204: and the method is used for loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal.
Optionally, the obtaining unit 201 is specifically configured to:
and carrying out full-band cell search and cell synchronization through air interface interception.
Optionally, the loading unit 204 is further configured to:
determining the SIR requirement of a cell to be shielded according to air interface interception;
and adjusting the power of the co-channel interference signal according to the signal-to-interference ratio (SIR) requirement.
Optionally, the loading unit 204 is further configured to:
determining the size of a region of a cell to be shielded;
and adjusting the power of the same-frequency interference signal according to the area size of the cell to be shielded.
Optionally, the co-channel interfering signal is random noise or a pseudo-random PN code.
From the above, it can be seen that: the embodiment of the invention provides a shielding device of a wireless communication system, which acquires configuration information of a cell to be shielded through air interface interception, wherein the configuration information comprises cell frequency points, frame timing, time slot timing and receiving power; determining a time-frequency position occupied by a reference pilot signal of a cell to be shielded according to frame timing and time slot timing; generating a same frequency interference signal according to the frequency point and the receiving power of the cell; and loading the co-channel interference signal to a time-frequency position occupied by the reference pilot signal. In the embodiment of the invention, the frequency point, the frame timing, the time slot timing and the receiving power information of the cell to be shielded are obtained through air interface interception; determining a to-be-shielded time-frequency position of a to-be-shielded cell according to the frame timing and the time slot timing; generating a same frequency interference signal according to the frequency point and the receiving power of the cell; the same frequency interference signal is loaded to the time frequency position to be shielded, namely, the same frequency interference signal is only loaded to the time frequency position occupied by the reference pilot signal of the cell to be shielded, but not the same frequency interference signal is loaded to the whole time slot of the downlink subframe of the cell to be shielded, so that the problems of high cost and high energy consumption caused by the shielding method in the prior art are solved.
It should be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A method of masking in a wireless communication system, comprising:
acquiring configuration information of a cell to be shielded through air interface interception, wherein the configuration information comprises a cell frequency point, frame timing, time slot timing and receiving power;
determining the time-frequency position occupied by the reference pilot signal of the cell to be shielded according to the frame timing and the time slot timing;
generating a same frequency interference signal according to the cell frequency point and the receiving power;
loading the co-frequency interference signal to a time-frequency position occupied by the reference pilot signal, and controlling the emission of the co-frequency interference signal at the time-frequency position;
acquiring configuration information of a cell to be shielded through air interface interception, wherein the configuration information comprises the following steps:
carrying out full-band cell search and cell synchronization through air interface interception;
before loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the method further includes:
determining the demodulation signal-to-interference ratio (SIR) requirement of the cell to be shielded according to air interface interception;
adjusting the power of the co-channel interference signal according to the demodulation signal-to-interference ratio (SIR) requirement;
before loading the co-channel interference signal to the time-frequency position occupied by the reference pilot signal, the method further includes:
and estimating the power of the time-frequency position occupied by the reference pilot signal of the cell to be shielded, and adjusting the power of the same-frequency interference signal according to the time-frequency position occupied by the reference pilot signal of the cell to be shielded after power estimation and the demodulation signal-to-interference ratio (SIR) requirement.
2. The method of claim 1, wherein loading the co-channel interference signal before the time-frequency position occupied by the reference pilot signal, further comprises:
determining the area size of the cell to be shielded;
and adjusting the power of the co-channel interference signal according to the area size of the cell to be shielded.
3. The method of any of claims 1-2, wherein the co-channel interfering signal is random noise or a pseudo-random PN code.
4. A shielding apparatus for a wireless communication system, comprising:
the device comprises an obtaining unit, a processing unit and a processing unit, wherein the obtaining unit is used for obtaining configuration information of a cell to be shielded through air interface interception, and the configuration information comprises a cell frequency point, frame timing, time slot timing and receiving power;
a determining unit, configured to determine, according to the frame timing and the slot timing, a time-frequency position occupied by a reference pilot signal of the cell to be shielded;
the generating unit is used for generating a same frequency interference signal according to the cell frequency point and the receiving power;
the loading unit is used for loading the co-frequency interference signal to a time-frequency position occupied by the reference pilot signal and controlling the emission of the co-frequency interference signal at the time-frequency position;
the obtaining unit is specifically configured to perform full-band cell search and cell synchronization through air interface listening;
the loading unit is further configured to determine a demodulation signal-to-interference ratio (SIR) requirement of the cell to be masked according to air interface interception;
adjusting the power of the co-channel interference signal according to the demodulation signal-to-interference ratio (SIR) requirement;
the loading unit is further configured to perform power estimation on the time-frequency position occupied by the reference pilot signal of the cell to be shielded, and adjust the power of the co-channel interference signal according to the time-frequency position occupied by the reference pilot signal of the cell to be shielded after power estimation and the demodulation signal-to-interference ratio SIR requirement.
5. The apparatus of claim 4,
the loading unit is further configured to determine the size of the area of the cell to be shielded;
and adjusting the power of the co-channel interference signal according to the area size of the cell to be shielded.
6. The apparatus of any of claims 4 to 5, wherein the co-channel interfering signal is random noise or a pseudo-random PN code.
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| CN201710067925.1A CN106921993B (en) | 2017-02-07 | 2017-02-07 | Shielding method and device of wireless communication system |
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| CN201710067925.1A CN106921993B (en) | 2017-02-07 | 2017-02-07 | Shielding method and device of wireless communication system |
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| CN106921993A CN106921993A (en) | 2017-07-04 |
| CN106921993B true CN106921993B (en) | 2020-12-08 |
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| CN110708755B (en) * | 2019-09-27 | 2021-11-09 | 浙江三维通信科技有限公司 | Synchronous time sequence shielding method and shielding system |
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| CN102868421B (en) * | 2012-05-30 | 2016-05-04 | 赵训威 | The signal shielding method of wireless communication system, Apparatus and system |
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