WO2017113062A1

WO2017113062A1 - Method and device for communications between time-frequency systems

Info

Publication number: WO2017113062A1
Application number: PCT/CN2015/099220
Authority: WO
Inventors: 王新征; 邓天乐; 周凯捷
Original assignee: 华为技术有限公司
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2017-07-06

Abstract

A method and device for communications between time-frequency systems, wherein the method comprises: a base station determines interference power information of a first system to a second system at a frequency spectrum border of the first system and the second system; determine, according to the interference power information, a signal transmitting mode of a terminal accessing the second system, wherein the signal transmitting mode comprises an original signal transmitting mode and an anti-interference mode of the second system; notify the terminal accessing the second system of the signal transmitting mode, so that the terminal transmits, after receiving the signal transmitting mode sent by the base station, a signal according to the received signal transmitting mode. Therefore, when different communication systems share a time-frequency resource, the signal interference level of the first system to the second system can be greatly reduced, thereby improving the communication quality of the second system.

Description

Communication method and device between time-frequency systems

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus between time-frequency systems.

Background technique

In the 4th generation mobile communication system (The 4th Generation, 4G), downlink transmission, that is, user Equipmen (UE) transmission, is based on orthogonal frequency division multiple access (OFDMA) multiple access. The uplink transmission, that is, the UE transmits to the base station, is based on the Single Carrier-Frequency Division Multiple Access (SC-FDMA) multiple access method.

Through scheduling, the 4G system can use only part of the time-frequency resources for a certain period of time, and vacate another part of the time-frequency resources. This flexible use of spectrum resources enables the future 4.5th generation mobile communication system (The 4.5th Generation, 4.5G) and the 5th generation mobile communication system (The 5th Generation, 5G) to use the existing 4G communication system idle. Time-frequency resources.

At present, industry research generally believes that 4.5G systems and 5G systems use air interface technology with a time-frequency structure similar to that of 4G systems. For example, OFDM and SC-FDMA change certain parameters, such as subcarrier spacing, CP length, etc., and can then be applied to certain scenarios of 4.5G and 5G systems. In addition, some variants of OFDM technology, such as filtered orthogonal frequency division multiplexing (Filtered OFDM, F-OFDM), general-purpose filtered orthogonal frequency division multiplexing (Universal-Filtered OFDM, UF-OFDM), generalized frequency division complex Generalized Frequency Division Multiplexing (GFDM), zero-tailed discrete Fourier transform extended Orthogonal Frequency Division Multiplexing (Zero-Tail DFT-S-OFDM), zero-filled Orthogonal Frequency Division Multiplexing (Zero-Padding OFDM, ZP-OFDM), Filter Bank Multi Carrier (FBMC) and other technologies also have the concept of subcarriers, which has a similar time-frequency structure as OFDM. The air interface technology with time-frequency structure can conveniently use the resource block (RB) that is not scheduled by the existing 4G system, so it can be easily embedded into the existing 4G system. They are future A popular candidate for the letter system.

Therefore, it can be seen that the 4G system vacates a part of the uplink and downlink spectrums in a certain period of time through uplink and downlink scheduling, and the 4.5G or 5G air interface technology can use the time-frequency resources vacated by the 4G system during this period.

However, when the 4.5G or 5G system uses the time-frequency resources vacated by the 4G system, the subcarriers of the 4.5G or 5G system are not orthogonal to the subcarriers of the 4G system, and the 4.5G or 5G system and the 4G system will Interference is generated, especially for subcarriers at the spectral boundaries of two different systems. The terminal that causes the 4.5G or 5G system will be interfered by the signal sent by the base station to the terminal of the 4G system, which seriously affects the terminal communication quality of the 4.5G or 5G system.

Summary of the invention

Embodiments of the present invention provide a method and apparatus for communication between time-frequency systems to solve the problem of signal interference generated when two different communication systems share time-frequency resources.

In a first aspect, a method for communication between time-frequency systems is provided, including:

Determining, by the base station, interference power information of the first system to a spectrum boundary of the first system and the second system,

Determining, by the base station, a signal transmission mode of the terminal connected to the second system according to the interference power information, where the signal transmission mode includes an original signal transmission mode and an anti-interference mode of the second system;

Transmitting, by the base station, the signal transmission mode to the terminal of the second system;

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the interference power information is an interference power or an interference power ratio.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the base station determines that the first system is in the first system and the first system Interference power information at the spectrum boundary of the two systems, including:

Obtaining, by the base station, a first received power of each subcarrier on the M1 subcarriers of the first system at the spectrum interface, where M1 is a positive integer;

The base station obtains the first system based on the first received power of the first system at each subcarrier The interference power of the second system at a spectral boundary of the first system and the second system, the interference power information being interference power.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the first received power is a sum of signal power, thermal noise power, and neighboring interference power.

With the second possible implementation of the first aspect, in a fourth possible implementation manner of the first aspect, the base station obtains, according to the first received power of each subcarrier, the first system to the second system Interference power at the spectral junction of the first system and the second system, including:

The base station performs weighted summation of the first received power of the first system on each of the subcarriers to obtain interference power of the first system to the second system at the spectrum boundary; or

The base station multiplies the first received power of the each subcarrier by the first system and multiplies the preset power to obtain the interference power of the first system to the second system at the spectrum boundary.

In this implementation, the base station determines the interference power received by the second system based on the received power of the first system. This method is simple in operation and can ensure the communication quality of the second system.

In conjunction with the first possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the base station determines that the first system is in the first system and the second system Interference power information at the spectrum junction, including:

Obtaining, by the base station, a second received power of each subcarrier in the spectrum used by the second system in the second system;

Calculating, by the base station, an average value of the second received power on the M2 subcarriers at the spectrum interface and the second system in the second system based on the second received power of the second system at each subcarrier a ratio of an average of the second received powers on the M3 subcarriers at a non-spectral boundary of the system and the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, The interference power information is an interference power ratio, and both M2 and M3 are positive integers.

In this implementation, the base station determines the interference power ratio received by the second system based on the received power of the second system, so that when the received power of the first system cannot be measured, the second system is directly measured, and the second is obtained. The interference power ratio of the system is measured by the interference power ratio The degree of interference experienced by the second system is more accurate and reliable.

In conjunction with the first possible implementation of the first aspect, in a sixth possible implementation manner of the first aspect, the base station determines that the first system is in the first system and the second system Interference power information at the spectrum junction, including:

The base station obtains a third received power of each subcarrier on the M4 subcarriers of the first system at the spectrum interface and each of the M3 subcarriers of the second system at the non-spectral boundary of the first system and the second system The second received power of the carrier, M3 is a positive integer;

Determining, by the base station, a leakage power of each subcarrier on the M2 subcarriers of the second system at the spectrum boundary based on a third received power of each subcarrier of the first system on the M4 subcarriers;

Calculating, by the base station, a second reception of the second system on the M3 subcarriers based on a second received power of each subcarrier of the M3 subcarriers at a non-spectral boundary of the first system and the second system Average value of power;

The base station sums the leakage power received by each subcarrier on the M2 subcarriers and the average value of the second received power on the M3 subcarriers, respectively, to obtain a second system on the M2 subcarriers. Second received power of each subcarrier;

Calculating, by the base station, an average value of the second received power on the M2 subcarriers at the spectrum interface and the second system in the second system based on the second received power of the second system at each subcarrier a ratio of an average of the second received powers on the M3 subcarriers at a non-spectral boundary of the system and the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, The interference power information is an interference power ratio, and M2, M3, and M4 are positive integers.

In this implementation manner, when the second system has high computational complexity, the base station transfers a part of the calculation amount of the second system to the first system, which helps reduce the burden of the second system and ensures the communication quality of the second system. .

With reference to the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner, in the seventh possible implementation manner of the first aspect, the second received power is a thermal noise power, a neighboring interference power And the sum of the leakage power.

In conjunction with the sixth possible implementation of the first aspect, in an eighth possible implementation of the first aspect, the third received power is a sum of signal power and neighboring interference power.

With reference to the first aspect or any one of the foregoing possible implementation manners, in a ninth possible implementation manner of the first aspect, the base station determines, according to the interference power information, a signal transmission mode of the terminal connected to the second system, including :

The base station keeps the signal transmission mode of the terminal connected to the second system unchanged when the interference power information is not greater than a preset threshold;

When the interference power information is greater than a preset threshold, the base station determines that the signal transmission mode of the terminal connected to the second system is an anti-interference mode.

With reference to the first aspect or any one of the foregoing possible implementation manners, in the tenth possible implementation manner of the first aspect, the anti-interference mode includes any combination of the following manners:

Elevating a transmit power of a plurality of subcarriers of the second system at the spectral interface;

Using a low order modulation technique on several subcarriers at the spectral interface;

The same or similar data is transmitted on several subcarriers at the spectral interface.

With reference to the first aspect or any one of the foregoing possible implementation manners, in an eleventh possible implementation manner of the first aspect, the base station notifying the terminal of the second system to the signal transmission mode, including:

Transmitting, by the base station, the signal transmission mode to the terminal under the jurisdiction of the second system by broadcast; or

The base station carries information about the signal transmission mode in the scheduling information, and notifies the terminal under the jurisdiction of the second system by using the scheduling information.

In a second aspect, a network device is provided, the network device having a function of implementing the behavior of the base station in the actual method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the network device includes a processor and a transceiver, where the processor is configured to support the base station to perform the foregoing method. The corresponding function. The transceiver is configured to support communication between the base station and the terminal, and send information or instructions involved in the foregoing method to the terminal. The network device can also include a memory for coupling with a processor that retains program instructions and data necessary for the network device.

In a third aspect, a method for communication between time-frequency systems is provided, including:

The terminal acquires a signal transmission mode sent by the base station;

The terminal transmits data according to the acquired signal transmission mode.

In a fourth aspect, a terminal is provided, the terminal having a function of implementing terminal behavior in the design of the foregoing method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above. The modules can be software and/or hardware.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the structure of the terminal includes a transceiver and a processor, and the transceiver is configured to support the terminal to receive a signal transmission mode configured by the base station for the terminal. The processor controls the terminal to transmit data according to a signal transmission mode received by the transceiver.

In a fourth aspect, a communication system is provided, the system comprising the network device and the terminal described in the above aspects.

In a fifth aspect, a communication method between time-frequency systems is provided, including:

Receiving, by the base station, baseband signals of the first system and the second system;

The base station filters the signal leaked by the first system to the second system and/or the signal leaked by the second system to the first system;

The base station adds the filtered base signal of the first system and the second system and transmits the baseband signal.

In a sixth aspect, a network device is provided, the network device having a function of implementing a behavior of a base station in the actual method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the network device The architecture includes a processor and a transceiver configured to support a base station to perform the corresponding functions of the above methods. The transceiver is configured to support communication between the base station and the terminal, and send information or instructions involved in the foregoing method to the terminal. The network device can also include a memory for coupling with a processor that retains program instructions and data necessary for the network device.

The beneficial effects of the present invention are as follows:

In the embodiment of the present invention, a communication scheme between time-frequency systems is provided. According to the communication scheme provided by the embodiment of the present invention, the base station determines, at the spectrum boundary of the first system and the second system, the second system. Interfering with the power information; and determining, according to the interference power information, a signal transmission mode of the terminal connected to the second system, where the signal transmission mode includes an original signal transmission mode and an anti-interference mode of the second system; The signal transmission mode notifies the terminal accessing the second system, and after receiving the signal transmission mode sent by the base station, the terminal transmits the signal according to the received signal transmission mode, so that when different communication systems share the time-frequency resources, The signal interference level of the first system to the second system can be greatly reduced, and the communication quality of the second system can be improved.

DRAWINGS

Figure 1 is a schematic diagram of the spectrum of a 4.5G system and a 4G system;

2 is a schematic diagram of interference power received by subcarriers of a 4.5G system at a spectral boundary between a 4.5G system and a 4G system;

3 is a schematic diagram of networking of devices involved in an application scenario according to an embodiment of the present invention;

4 is a schematic flowchart of a communication method between base station side time-frequency systems according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an example of calculation of interference power ratio according to an embodiment of the present invention; FIG.

6 is a schematic flowchart of a communication method between terminal-time time-frequency systems according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of a communication method between network side time-frequency systems according to another embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a frequency response of filtering a first system by using a band rejection filter according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a frequency response of filtering a second system by using a band pass filter according to an embodiment of the present invention; FIG.

FIG. 10 is a block diagram showing base station side baseband transmission during filtering according to an embodiment of the present invention; FIG.

11 is a block diagram showing base station side baseband transmission during filtering according to another embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a communication device between network time-frequency systems according to an embodiment of the present invention; FIG.

FIG. 13 is a schematic structural diagram of a communication device between time-frequency systems on a terminal side according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic structural diagram of a communication device between base station side time-frequency systems according to another embodiment of the present invention; FIG.

FIG. 15 is a schematic structural diagram of a network device between time-frequency systems on a base station side according to an embodiment of the present invention; FIG.

16 is a schematic structural diagram of user equipment between time-frequency systems on a terminal side according to an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a network device between time-frequency systems on a base station side according to another embodiment of the present invention; FIG.

detailed description

The OFDM signal and the SC-FDMA signal are composed of a number of subcarriers in terms of frequency, and are composed of a number of OFDM symbols or SC-FDMA symbols in terms of time. The two-dimensional grid composed of time and frequency is usually used to describe the air interface resources of the 4G system, that is, time-frequency resources. For downlink transmission, time-frequency resources are divided into OFDM symbols in the time domain dimension and subcarriers in the frequency domain dimension; for uplink transmission, time-frequency resources are divided into SC-FDMA symbols and frequency domain dimensions in the time domain dimension. Subcarriers.

The time-frequency system described in the embodiment of the present invention refers to a communication system that transmits data by using time-frequency resources. In the time-frequency system, the signal is carried by the subcarrier in the frequency domain (the subcarrier in the frequency domain), and is carried by the symbol in the time domain (the unit in the time domain is a symbol), the symbol and The OFDM symbol or SC-FDMA symbol is similar. The first system and the second system in the embodiments of the present invention are all the above-mentioned time-frequency systems, and the two systems can use different air interface technologies, for example, the first system adopts OFDM, the second system adopts FBMC, and the same air interface can also be used. Techniques, such as the first system and the second system, all employ OFDM, but the set parameters have different values, such as different subcarrier spacings or different CP lengths. The subcarriers of such two systems are not orthogonal, and in addition, the subcarriers used by the first system and the second system are relatively close in frequency.

Through scheduling, the first system can use only a part of the time-frequency resources for a certain period of time, and vacate Another part of the time-frequency resource is used by the second system.

The following is an application scenario in which the first system is a 4G system, and the second system is a 4.5G system, and the subcarriers of the two communication systems are relatively close in frequency, and interference may occur at the spectrum boundary of the two communication systems. .

Figure 1 is a schematic diagram of the spectrum of a 4.5G system and a 4G system.

For example, when the 4.5G system uses the time-frequency resources vacated by the 4G system, the subcarriers of the 4.5G system are not orthogonal to the subcarriers of the 4G system. It is assumed that the 4.5G air interface technology is the same as the 4G, except that the subcarrier spacing is Δf = 15 kHz of 4G becomes Δf1 = 1.25 kHz of 4.5G. As shown in Figure 1, it is assumed that the 4.5G system uses 6 RBs in the 4G system spectrum. These 6 RBs are not necessarily in the middle of the 4G system spectrum and can be biased to one side. Due to the inconsistent subcarrier spacing, the subcarriers of 4G and 4.5G technologies will interfere with each other. Therefore, the protective band of the 4G and 4.5G technology should be left at the boundary of the spectrum. The width of the guard band in the figure is 12.5 × Δf1. The setting of these parameters refers to the related parameters of the physical random access channel (PRACH) and the physical uplink shared channel (PUSCH) of the 4G system.

The guard band set in Figure 1 does not completely isolate the interference. Considering the uplink, the interference power of the subcarriers of the 4G system received by the subcarriers of the 4.5G system in FIG. 1 is as shown in FIG. 2. It can be seen from Fig. 2 that the subcarriers of the 4.5G system at the spectrum boundary of the two systems are subjected to the largest interference power. In addition, when considering the downlink, the terminals of both systems are interfered by the signals sent by the base station to the terminals of the other system.

Therefore, when the second system having the time-frequency structure uses a part of the spectrum of the first system also having the time-frequency structure, the sub-carriers of the two systems interfere with each other. The purpose of embodiments of the present invention is to minimize the performance degradation caused by the interference of the first system to the second system. After the communication method in the embodiment of the present invention is applied, the performance impact of the first system on the second system can be reduced. Therefore, the second system can be referred to as a protected system, and the first system can be referred to as a non-protected system.

As shown in FIG. 3, the application scenario of the embodiment of the present invention includes:

The base station 101 is a base station of the serving cell of the UE 102, the UE 103, and the UE 104, and is configured to send signal transmission mode information to the UE 102, the UE 103, and the UE 104.

The UE 102, the UE 103, and the UE 104 are configured to perform coding modulation, subcarrier mapping, and power setting operations according to the received signal transmission mode after receiving the signal transmission mode information sent by the base station 101, and finally transmit the signal.

It should be noted that the base station 101 here communicates with the UE 102, the UE 103, and the UE 104 through air interface technology, and can transmit and receive information of two systems having a time-frequency structure. The first system vacates some spectrums for a certain period of time and is not used by the second system for use by the second system, so the subcarriers used by the two systems are relatively close in frequency. Among all the terminals served by the base station, some terminals are terminals supporting the first system, and some terminals are terminals supporting the second system. Of course, it is not excluded that some terminals support both the first system and the second system.

As shown in FIG. 4, the communication method between time-frequency systems provided by the embodiment of the present invention is as follows:

Step 400: The base station determines interference power information of the first system to the spectrum boundary of the second system at the first system and the second system.

The base station is a base station located in the first system.

Optionally, the interference power information is an interference power or interference power ratio.

Specifically, when determining, by the first system, interference power of the second system to a spectrum boundary of the first system and the second system, the base station performs:

Obtaining, by the base station, a first received power of each subcarrier on the M1 subcarriers at a first system spectrum boundary, where M1 is a positive integer;

The base station obtains interference power of the first system to a spectrum boundary of the second system at the first system and the second system based on a first received power of the first system at each subcarrier.

The first received power is a sum of signal power, thermal noise power, and neighboring interference power.

Further, when the interference power information is interference power, the base station obtains, according to the first received power of each subcarrier, a first system to a second system at a spectrum boundary of the first system and the second system. When interfering with power, the following two methods are included:

In a first mode, the base station performs weighted summation of the first received power of the first system on each subcarrier to obtain interference power of the first system to the second system spectrum boundary.

Specifically, the ratio of the received power of the subcarriers of the first system within a certain range of the spectrum of the second system to the second system is higher. The received power of the subcarriers of the first system outside the certain range of the second system spectrum is hardly leaked into the bandwidth of the second system and causes interference to the latter, so the base station according to the distance of each of the M subcarriers is second. The distance of the edge subcarriers of the system determines the weight corresponding to each subcarrier.

For example, the ten subcarriers of the first system numbered 0-9 are located at the spectral boundary of the first system and the second system, wherein the subcarrier 0 is closest to the spectrum of the second system, and the distance increases as the subcarrier number increases. The distance between the spectrums of the two systems is gradually increased. It is assumed that the spectrum of the sub-carrier 6, sub-carrier 7, sub-carrier 8, and sub-carrier 9 from the second system exceeds the preset range, and the signals of these sub-carriers hardly affect the second system. Therefore, the weights of the subcarrier 6, the subcarrier 7, the subcarrier 8, and the subcarrier 9 are both set to 0, and the weight of the subcarrier 1 is q1=0.3, the weight of the subcarrier 2 is q1=0.3, and the subcarrier 3 is obtained according to a large number of simulation tests. The weight q3 = 0.2, the weight of subcarrier 5 is q1 = 0.15, and the weight of subcarrier 6 is q1 = 0.05.

The second method is: the base station adds the first received power of each subcarrier to the first system, and multiplies the preset power to obtain the interference power of the first system to the second system spectrum boundary. The specific value of the preset coefficient is not limited in the embodiment of the present invention, and may be determined according to performance requirements of the first system or the second system.

The base station determines, by the interference power, that the transmission mode of the second system is considered from the perspective of the first system, that is, the unprotected system, that is, by calculating the first system at a spectrum boundary of the first system and the second system. The total received power is used to determine the interference power received by the second system, thereby obtaining the transmission mode of the second system.

Further, the base station may further determine a transmission mode of the second system by using an interference power ratio received by the second system.

The interference power ratio is used to describe the degree of difference between the interference power of each subcarrier at the spectral interface and the interference power of each subcarrier at the non-spectral boundary.

When the interference power information is the interference power ratio, the interference power ratio received by the second system can be determined by the following two methods:

method one

Step 1: The base station obtains a second receiving power of each subcarrier in the spectrum used by the second system in the second system;

Step 2: The base station calculates an average value of the second received power on the M2 subcarriers at the second system spectrum boundary based on the second received power of the second system in each subcarrier, and the second system is in the a ratio of the average of the second received powers on the M3 subcarriers at a non-spectral boundary of the system and the second system, to obtain an interference power ratio of the first system to the second system spectral boundary, M2 and M3 Both are positive integers.

Assuming that the spectrum of the second system is embedded inside the spectrum of the first system, there are two locations at the spectrum boundary of the first system and the second system, and the second system includes M2 subcarriers at the two spectral boundaries. When M3 subcarriers are included in the non-spectral interface, when the spectrum used by the second system includes P total number of subcarriers, P≥2M2+M3.

The second received power is a sum of thermal noise power, neighboring interference power, and leakage power.

This method performs statistical measurements from the perspective of the second system, the protected system, to determine the interference power ratio experienced by the second system.

For example, in step 1, the base station needs to count the second system, that is, the total power of each of the sub-carriers on the sub-carriers of the protected system, the neighboring area interference power, and the leakage power leaked by the first system, that is, the second receiving. power. A specific calculation example is given below.

The method for calculating, by the base station, the total power of the thermal noise power, the neighboring interference power, and the leakage power leaked by the first system on the sub-carrier of the second system, and whether the sub-carrier is occupied by the terminal of the second system, that is, the Whether the subcarrier has an uplink signal of the terminal of the second system. For the subcarrier k that is not occupied, the base station obtains the target subcarrier k on the nth (N1≤n≤N2) symbols (for example, OFDM symbol or SC-FDMA symbol, etc.) according to the processing flow of receiving the second system terminal signal. The frequency domain symbol X(n, k) on it. X(n,k) contains a thermal noise signal, a neighboring interference signal, and a leaked interference signal. Symbols N1 through N2 are statistical intervals that count the total power of thermal noise, neighbor interference, and leakage interference on the subcarrier. Different technologies have different processing flows to get X(n,k). For OFDM and SC-FDMA, the base station performs Cyclic Prefix (CP) and Fast Fourier Transform (FFT) operations to obtain X(n,k), thermal noise power, and neighboring interference power. The total power of the three leakage systems leaked from the first system is calculated as

Thus, the second received power of the subcarrier k is obtained, and k is any subcarrier number in the spectrum used by the second system, thereby obtaining the second received power of the second system on each subcarrier.

For the subcarrier occupied by the terminal of the second system, it cannot be calculated according to the previous formula, because X(n,k) contains the second system except the thermal noise signal, the adjacent area interference signal and the leaked interference signal. The signal sent by the terminal. The pilot signal transmitted by the terminal of the second system is used to estimate the total power of the thermal noise power, the neighboring interference power, and the leakage power leaked by the first system, that is, the second received power. The denser the subcarriers occupied by the pilot signals, the higher the estimation accuracy, but the fewer subcarriers the terminal uses to transmit data. The estimation algorithm is existing in existing systems, but the power estimation algorithm often assumes that different subcarriers have the same second received power. This can be estimated by segmenting the subcarriers because the total power of the thermal noise power, the neighboring interference power, and the leakage power leaked by the first system on adjacent (eg, 50 or 100) subcarriers are approximately equal. .

Determining the total power of each of the sub-carriers in the second system using the thermal noise power of each subcarrier, the neighboring interference power, and the leakage power leaked by the first system, that is, the second received power, determining the subcarriers at the spectral boundary Whether the second received power is significantly greater than the second receiving rate on the subcarrier at the non-spectral boundary, assuming that the spectrum of the second system is embedded inside the spectrum of the first system, the spectrum of the first system and the second system at this time There are two junction locations, and the second system includes M2 subcarriers at the two spectral boundaries. One method of judging is to count the average received power of each M2 subcarriers at both ends of the spectrum of the second system.

Average received power of M3 subcarriers in the middle of the spectrum

M in the formula is the total number of subcarriers of the second system,

Represents the largest integer that does not exceed x.

Further, the calculation

The ratio of the interference power of the second system at the spectral spectral boundary of the second system to the middle of the spectrum is obtained. The calculation formula of the above three average powers is schematic, and it is not necessary to calculate this. The superscript in the summation can be different from the formula here. For the example shown in Figure 1, M=839. You can set M2=100, M3=100, and set the preset threshold η=4 or η=3.5 of the interference power ratio. These values are designed according to the actual situation. The larger the preset threshold is, the easier it is to enter the anti-interference mode.

Method Two

Step 1: The base station obtains a third received power of each subcarrier on the M4 subcarriers at the first system spectrum boundary and each of the M3 subcarriers of the second system at the non-spectral boundary of the first system and the second system The second received power of the carrier, M3 is a positive integer;

Step 2: The base station determines, according to a third received power of each subcarrier of the M4 subcarriers by the first system, a leakage power of each subcarrier on the M2 subcarriers at the spectrum interface.

Step 3: The base station calculates, based on the second received power of each subcarrier on the M3 subcarriers at the non-spectral boundary of the first system and the second system, the second system calculates the second system on the M3 subcarriers. The average of the second received power;

Step 4: The base station respectively sums the leakage power received by each subcarrier on the M2 subcarriers and the average value of the second received power on the M3 subcarriers, to obtain a second system in the M2. Second received power of each subcarrier on each subcarrier;

Step 5: The base station calculates an average value of the second received power on the M2 subcarriers at the second system spectrum boundary based on the second received power of the second system at each subcarrier, and the second system is in the a ratio of the average of the second received powers on the M3 subcarriers at a non-spectral boundary of the system and the second system, to obtain an interference power ratio of the first system to the second system spectrum boundary, M2, M3 Both M4 and M4 are positive integers.

The second received power is a sum of a thermal noise power, a neighboring interference power, and a leakage power; and the third received power is a sum of a signal power and a neighboring interference power.

This method transfers a portion of the computation of the second system, the protected system, to the first system, the unprotected system. This is beneficial when the computational complexity of the protected system is high. For example, when the protected system is an uplink unscheduled transmission system, the base station will perform detection and decoding without interruption, because I do not know. When the terminal sends data, the computational complexity is high. Moving some of the computational load of a protected system to an unprotected system can help alleviate the burden on the protected system. Another starting point of this method is that the number of pilots transmitted by the protected system terminal may not be much. If the uplink traffic of the protected system is large and more pilot subcarriers cannot be set, then the estimated each The total power error of the interference will be large, especially in the place where the interference power of the spectrum junction is more severe.

It should be noted that the system includes an uplink scheduling transmission system, that is, the base station allocates resources for uplink transmission to the terminal, and then the terminal sends uplink data on the resource, and the uplink unscheduled transmission system, that is, the base station does not need to allocate for each terminal. A dedicated resource, when the terminal has data to send, select one of the available resources to send in some way.

The higher the ratio of the power of the subcarriers of the first system closer to the second system spectrum to the second system. The received power of the sub-carriers of the first system that is far from the spectrum of the second system hardly leaks into the bandwidth of the second system and causes interference to the latter. Therefore, when calculating the power leaked into the spectrum of the second system, it is only necessary to pay attention to the several subcarriers of the first system close to the second system.

For the example in FIG. 1, as shown in FIG. 5, the first system is a 4G system, that is, the non-protected system, and the second system is a 4.5G system, that is, a protected system, for example, the second system and the first system are The subcarriers are numbered from the spectral boundary to the direction away from the junction. The sum of the neighboring interference power of the subcarrier m of the second system and the signal power of the useful signal of the second system, that is, the ratio of the third received power leaked to the subcarrier k of the second system is denoted as g(m, k). g(m,k) decreases as m and k become larger. g(m,k) can be obtained by simulation or theoretical analysis. If the interference power ratio of the second system exceeds a certain threshold, the second system must adopt an anti-interference mode.

The method for estimating the third received received power on the first system subcarrier m is as follows: first, on the subcarrier m on the nth (N1≤n≤N2) symbols (for example, an OFDM symbol or an SC-FDMA symbol, etc.) Frequency domain symbol X(n, m). The process of obtaining X(n,m) is related to different technologies. X(n,m) contains interference from thermal noise power, neighboring interference power, signal power, and leaked leakage power. Ignore the leakage power leakage, the neighboring interference power on the subcarrier m and the total received power of the signal power

Where N ₀ is the thermal noise power on the subcarrier, and the magnitude of the value is related to the subcarrier spacing. It is a constant and does not need to be estimated.

It is assumed that the leakage power of the nearest M4 subcarriers of the first system and the second system significantly affects the second system. From the simulation results, M4 can be set to 24. For the LTE system, this is the number of subcarriers included in the 2 RBs. Leakage power received by subcarrier k of the second system

If both ends of the spectrum of the second system are adjacent to the spectrum of the first system, such as the one shown in FIG. 5, then the power leakage at both ends is calculated when Q(k) is calculated, that is,

Where P ₁ (m) and P ₂ (m) correspond to the power values of the left and right sides, respectively, and P is the total number of subcarriers included in the spectrum used by the second system. The k in Q(k) is numbered starting from the left junction.

When calculating Q(k), each of the M4 subcarriers of the first system needs to be weighted differently. An approximate calculation can be made when calculating the weighting coefficient. For example, m1 m is considered to be continuous, and m1=12 is assumed, that is, the number of subcarriers included in one RB of the LTE system, and g(m, k) corresponding to consecutive k1 ks. The values are approximately equal. Alternatively, the arithmetic coefficients are averaged for all of these coefficients to obtain new coefficients, so that the storage of the coefficients can be simplified, and the first system does not need to estimate the second received power by subcarriers, and can be by resource blocks, ie, The 12 carriers estimate the second received power.

It is assumed that the adjacent channel interference power received by the second system is approximately equal in the middle of the spectrum of the system and the two ends of the spectrum. The leakage power received at the non-spectral boundary of the second system, that is, the middle of the spectrum in FIG. 5 is generally small and can be ignored. . In this way, based on the second received power of each subcarrier on the M3 subcarriers at the non-spectral interface, the average of the second received power of the second system on the M3 subcarriers is obtained in the method 1.

Adding the leakage power received by each subcarrier to the average of the second received power of the second system at the non-spectral boundary, thereby obtaining the second received power of each second carrier at the spectral interface, ie, the method One of

with

Next, the interference power ratio of the second system is calculated according to the method provided in Method 1.

Step 401: The base station determines a signal transmission mode of the terminal connected to the second system based on the interference power information.

Specifically, when determining, by the base station, the signal transmission mode of the terminal connected to the second system based on the interference power information, performing:

The base station keeps the signal transmission mode of the terminal connected to the second system unchanged when the interference power or the interference power ratio is not greater than a preset threshold;

And determining, by the base station, that the signal transmission mode of the terminal connected to the second system is an anti-interference mode when the interference power or the interference power ratio is greater than a preset threshold;

The anti-interference mode is to select a preset anti-interference mode in the original signal transmission mode of the second system.

It should be noted that the preset threshold of the interference power is a first threshold, and the preset threshold of the interference power ratio is a second threshold, and the first threshold and the second threshold are specifically determined according to actual conditions. Generally not the same.

The preset anti-interference mode includes any combination of the following modes:

The first way is to increase the transmit power of several subcarriers at the spectrum boundary of the second system;

The second way is: using low-order modulation techniques on several subcarriers at the spectrum interface;

The third way is to transmit the same or similar data on several subcarriers at the spectrum boundary.

The transmission of similar data on several subcarriers means that successive subcarriers transmit the same data through the transformed data, for example, two subcarriers are conjugated with one X and the other transmits -X. They are not the same data but are all transformed from X, called similar data.

Step 402: The base station notifies the signal transmission mode to access the terminal of the second system.

Specifically, the base station notifies the signal transmission mode to the terminal of the second system, and the following two methods are used:

The first method is: the base station broadcasts the signal transmission mode notification to the terminal of the second system by means of a broadcast.

The second method is: the base station carries information about the signal transmission mode in the scheduling information, and notifies the terminal that accesses the second system by using the scheduling information.

For example, for the example in Figure 5, the base station adds 2 bits to the scheduling information. 00 indicates that the anti-interference mode is not adopted; 01 indicates the right spectrum, that is, the portion with the high subcarrier index adopts the anti-interference mode; 10 means that the left side is used; 11 means that both ends are used. Just an example, actually telling more information, for example, how much power is raised in the anti-interference mode, and how many subcarriers are carried.

After applying the method of reducing interference in FIG. 4, the performance impact of the first system on the second system can be greatly reduced. For the first system, other methods can be used, for example, try not to use subcarriers close to the spectrum boundary of the two systems, or can perform multiple retransmissions to ensure the performance of the first system, while the second system may not have a small bandwidth. There is room for manoeuvre, or the service delay is high, and multiple retransmissions cannot be performed, so that the performance of the first system and the first system can be ensured at the same time.

As shown in FIG. 6, the communication method between the time-frequency systems on the terminal side according to the embodiment of the present invention includes:

Step 600: The terminal acquires a signal transmission mode sent by the base station.

Step 601: The terminal sends data according to the acquired signal transmission mode.

The method in FIG. 4 and FIG. 6 above is to reduce the interference of the first system to the second system from the uplink consideration. From the downlink, the existing communication system does not filter the signal within the system bandwidth. Because the different subcarriers of the same air interface technology are orthogonal, no interference is generated and no filtering is required. If the spectrum of one system is interspersed with another system, the subcarriers of the two systems are not orthogonal and will interfere with each other. This requires filtering. Therefore, Figure 7 shows a communication method between time-frequency systems, including:

Step 700: The base station receives baseband signals of the first system and the second system.

The base station is a base station located in the first system or a base station located in the second system.

Step 701: The base station performs filtering processing on the signal leaked by the first system to the second system and/or the signal leaked by the second system to the first system.

When the spectrums of the first system and the second system are relatively close, the base station usually adds the baseband signals obtained by the two systems at an appropriate sampling rate and then transmits them through operations such as up-conversion. The base station performs any one of the following two operations or two filtering operations before adding the baseband signals of the two systems:

The first filtering operation filters the signal of the first system to filter out the power of the signal of the first system leaking into the frequency band of the second system. If the frequency band of the second system is the frequency embedded in the first system With the internal, as shown in Figure 1, then the filter is a band-stop filter, the frequency response diagram is shown in Figure 8.

The second filtering operation filters the signal of the second system to filter out the power of the signal of the second system leaking into the frequency band of the first system. If the frequency band of the second system is embedded inside the frequency band of the first system, as shown in FIG. 1, the filter is a band pass filter, and the frequency response diagram is as shown in FIG.

Step 702: The base station adds the baseband signals of the filtered first system and the second system, and then transmits the baseband signals.

It should be noted that the foregoing filtering operation may be performed before the “plus CP” operation of the base station, and the specific base station side baseband transmission block diagram is as shown in FIG. 10, and may also be performed after the “adding CP” operation of the base station, the specific base station. The side baseband transmission block diagram is shown in Figure 11.

FIG. 12 is a schematic structural diagram of a communication device on a network side according to an embodiment of the present invention. The apparatus can be used to perform the method illustrated in FIG. The communication device may be a base station of the first system or a device installed on the base station, or another device capable of communicating with the base station.

Referring to FIG. 12, the apparatus includes: a determining unit 120, a processing unit 121, and a transmitting unit 122, where:

a determining unit 120, configured to determine interference power information of the first system to a spectrum boundary of the second system at the first system and the second system,

The processing unit 121 is configured to determine, according to the interference power information, a signal transmission mode of a terminal connected to the second system, where the signal transmission mode includes an original signal transmission mode and an anti-interference mode of the second system;

The sending unit 122 is configured to notify the terminal of the signal transmission mode to the terminal of the second system;

Optionally, the determining unit 120 is specifically configured to: when determining, by the first system, interference power information of the second system at a spectrum boundary between the first system and the second system:

Obtaining a first reception of each subcarrier on the M1 subcarriers of the first system at the spectral interface Power, M1 is a positive integer;

Obtaining interference power of the first system to a spectrum boundary of the second system at the first system and the second system based on a first received power of the first system at each subcarrier, the interference power information To interfere with power.

Optionally, the first received power is a sum of signal power, thermal noise power, and neighbor interference power.

Optionally, the determining unit 120, when based on the first received power of each subcarrier, obtains interference power of the first system to the spectrum boundary of the second system at the first system and the second system, specifically to:

And performing weighted summation of the first received power of the first system on each of the subcarriers to obtain interference power of the first system to the second system at the spectrum boundary; or

The first system adds the first received power of each subcarrier and multiplies the preset power to obtain the interference power of the first system to the second system at the spectrum boundary.

Obtaining a second received power of each subcarrier in the spectrum used by the second system in the second system;

Calculating an average of the second received power of the second system on the M2 subcarriers at the spectral interface based on the second received power of the second system at each subcarrier, and the second system is at the first a ratio of an average of the second received powers on the M3 subcarriers of the system and the non-spectral interface of the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, wherein The interference power information is an interference power ratio, and both M2 and M3 are positive integers.

Obtaining a third received power of each subcarrier on the M4 subcarriers of the first system at the spectral interface and each subcarrier on the M3 subcarriers of the second system at the non-spectral boundary of the first system and the second system Second received power, M3 is a positive integer;

Determining a leakage power of each subcarrier on the M2 subcarriers of the second system at the spectrum boundary based on a third received power of each subcarrier of the first system on the M4 subcarriers;

Calculating a second received power of the second system on the M3 subcarriers based on a second received power of each subcarrier on the M3 subcarriers at a non-spectral boundary of the first system and the second system by the second system average value;

And respectively summing, by the second system, the leakage power received by each subcarrier on the M2 subcarriers and the average value of the second received power on the M3 subcarriers, to obtain a second system on the M2 subcarriers. Second received power of the subcarriers;

Calculating an average of the second received power of the second system on the M2 subcarriers at the spectral interface based on the second received power of the second system at each subcarrier, and the second system is at the first a ratio of an average of the second received powers on the M3 subcarriers of the system and the non-spectral interface of the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, wherein The interference power information is an interference power ratio, and M2, M3, and M4 are positive integers.

Optionally, the second received power is a sum of thermal noise power, neighbor interference power, and leakage power.

Optionally, the third received power is a sum of signal power and neighbor interference power.

Optionally, when the processing unit 121 determines a signal transmission mode of the terminal connected to the second system based on the interference power information, specifically, the processing unit 121 is specifically configured to:

When the interference power information is not greater than a preset threshold, the signal transmission mode of the terminal connected to the second system remains unchanged;

When the interference power information is greater than a preset threshold, determining that a signal transmission mode of the terminal connected to the second system is an anti-interference mode.

Optionally, the anti-interference mode includes any combination of the following:

Optionally, when the sending unit is configured to notify the terminal that is controlled by the second system, the sending unit 122 is specifically configured to:

Notifying the signal transmission mode to a terminal under the jurisdiction of the second system by broadcast; or

The information of the signal transmission mode is carried in the scheduling information, and the terminal under the jurisdiction of the second system is notified by the scheduling information.

FIG. 13 is a schematic structural diagram of a communication device on a terminal side according to an embodiment of the present invention. The apparatus can be used to perform the method illustrated in FIG. The communication device may be a terminal device, or a device installed on the base station, or another device capable of communicating with the terminal device.

Referring to FIG. 13, the apparatus includes: an obtaining unit 130 and a processing unit 131,

The acquiring unit 130 is configured to acquire a signal transmission mode sent by the base station;

The processing unit 131 is configured to send data according to the acquired signal transmission mode.

FIG. 14 is a schematic structural diagram of a communication device on a network side according to an embodiment of the present invention. The apparatus can be used to perform the method illustrated in FIG.

Referring to FIG. 14, the apparatus includes: a receiving unit 140, a processing unit 141, and a transmitting unit 142, wherein:

The receiving unit 140 is configured to receive baseband signals of the first system and the second system;

The processing unit 141 is configured to perform filtering processing on a signal that the first system leaks to the second system and/or a signal that the second system leaks into the first system;

The sending unit 142 is configured to add the baseband signals of the filtered first system and the second system to be transmitted.

Based on the same concept, as shown in FIG. 15, a schematic diagram of a network device structure of a time-frequency system according to an embodiment of the present invention is shown. The network device can be used to perform the method shown in FIG. The network device is a network device of the first system, and may include a base station, or a radio resource management device for controlling the base station, or a base station and a radio resource management device for controlling the base station; wherein the base station may be a macro station or a small station, For example, a small cell, a pico cell, etc., the base station may also be a home base station, such as a Home NodeB (HNB), a Home eNodeB (HeNB), etc. It may include a relay or the like. For example, for an LTE system, the network device may be an evolved NodeB (eNodeB). For a TD-SCDMA system or a WCDMA system, the network device may include: a Node B (NodeB) and/or a radio network controller (Radio). Network Controller, RNC).

Referring to FIG. 15, the network device includes a processor 1501, a memory 1502, and a transceiver 1503.

The transceiver 1503 can be a wired transceiver, a wireless transceiver, or a combination thereof. The wired transceiver can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network transceiver, a cellular network transceiver, or a combination thereof. The processor 1501 may be a central processing unit (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviated: NP) or a combination of a CPU and an NP. The processor 1501 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (abbreviated as PLD), or a combination thereof. The above PLD can be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD), field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: generic array Logic, abbreviation: GAL) or any combination thereof. The memory 1502 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory 1502 may also include a non-volatile memory (English: non-volatile memory) ), such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state Drive, abbreviation: SSD); the memory 1502 may also include a combination of the above types of memories.

The memory 1502 can be used to store messages received by the transceiver 1503, as well as programs executed by the processor 1501.

The processor 1501 is configured to determine interference power information of the first system, where the second system is at a spectrum boundary of the first system and the second system, and determine, according to the interference power information, access to the second system a signal transmission mode of the terminal, the signal transmission mode including an original signal transmission mode and an anti-interference mode of the second system;

The transceiver 1503 is configured to notify the terminal of the second system by notifying the signal transmission mode.

In conjunction with the first possible implementation of the third aspect, in a second possible implementation manner of the third aspect, the processor 1501 determines that the first system is in the first system When the interference power information of the system and the spectrum boundary of the second system is used, it is specifically used for:

Obtaining a first received power of each subcarrier on the M1 subcarriers of the first system at the spectrum interface, where M1 is a positive integer;

Optionally, when the processor 1501 obtains interference power of the first system to the spectrum boundary of the second system at the first system and the second system based on the first received power of each subcarrier, to:

Optionally, the processor 1501 is specifically configured to: when determining, by the first system, interference power information of the second system at a spectrum boundary between the first system and the second system:

Obtaining a third reception of each subcarrier on the M4 subcarriers of the first system at the spectral interface a second received power of each subcarrier on the M3 subcarriers of the second system at a non-spectral boundary of the first system and the second system, M3 being a positive integer;

Optionally, when determining, by the processor 1501, the signal transmission mode of the terminal connected to the second system based on the interference power information, the processor 1501 is specifically configured to:

Optionally, the transceiver 1503 is specifically configured to: when notifying the signal transmission mode of the terminal that is controlled by the second system:

Wherein, in FIG. 15, a bus interface may also be included, and the bus interface may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1501 and various circuit links of the memory represented by the memory 1502. Together. The bus interface can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.

It will be appreciated that Figure 15 only shows a simplified design of the network. In practical applications, the network device can include any number of transceivers, processors, memories, etc., and all devices that can implement the present invention are within the scope of the present invention.

Based on the same concept, as shown in FIG. 16 , a schematic structural diagram of a user equipment on a terminal side according to an embodiment of the present invention is shown. The user equipment can be used to perform the method shown in FIG. Wherein: the user equipment may be a wireless terminal, the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal The computers, for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, personal communication service (PCS, Personal Communication Service) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA, Personal Digital Assistant), etc. . The wireless terminal may also be referred to as a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.

Referring to FIG. 16, the apparatus includes a processor 1601, a memory 1602, and a transceiver 1603.

The transceiver 1603 is configured to acquire a signal transmission mode sent by the base station;

The processor 1601 is configured to send data according to the acquired signal transmission mode.

The transceiver 1603 can be a wired transceiver, a wireless transceiver, or a combination thereof. The wired transceiver can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network transceiver, a cellular network transceiver, or a combination thereof. The processor 1601 may be a CPU, an NP or a combination of a CPU and an NP. The processor 1601 may further include a hardware chip. The hardware chip described above may be an application specific integrated circuit ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof. The memory 1602 can include volatile memory, such as RAM; the memory 1602 can also include non-volatile memory, such as ROM, flash memory, HDD or SSD; the memory 1602 can also include a combination of the types of memory described above.

The memory 1602 can be used to store messages received by the transceiver 1603, as well as programs executed by the processor 1601.

In FIG. 16, a bus interface may also be included, and the bus interface may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1601 and various circuit links of the memory represented by the memory 1602. Together. The bus interface can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.

Based on the same concept, as shown in FIG. 17, a schematic structural diagram of a communication device on the network side of the present invention is provided. The user equipment can be used to perform the method shown in FIG. The network device is a network device of the first system or the second system, and may include a base station, or a radio resource management device for controlling the base station, or a base station and a radio resource management device for controlling the base station; wherein the base station may be a macro station Or a small station, such as a small cell or a pico cell, and the base station may also be a home base station, such as a Home NodeB (HNB) or a Home evolved Node B (Home). The eNodeB, HeNB, etc., the base station may also include a relay node or the like. For example, for an LTE system, the network device may be an evolved NodeB (eNodeB). For a TD-SCDMA system or a WCDMA system, the network device may include: a Node B (NodeB) and/or a radio network controller (Radio). Network Controller, RNC).

Referring to FIG. 17, the apparatus includes a processor 1701, a memory 1702, and a transceiver 1703.

The transceiver 1703 can be a wired transceiver, a wireless transceiver, or a combination thereof. The wired transceiver can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network transceiver, a cellular network transceiver, or a combination thereof. The processor 1701 may be a CPU, an NP or a combination of a CPU and an NP. The processor 1701 may further include a hardware chip. The hardware chip described above may be an application specific integrated circuit ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof. The memory 1702 can include volatile memory, such as RAM; the memory 1702 can also include non-volatile memory, such as ROM, flash memory, HDD or SSD; the memory 1702 can also include a combination of the types of memory described above.

The memory 1702 can be used to store messages received by the transceiver 1703, as well as programs executed by the processor 1701.

The transceiver 1703 is configured to receive baseband signals of the first system and the second system;

The processor 1701 is configured to perform filtering processing on a signal leaked by the first system to the second system and/or a signal leaked by the second system to the first system;

The transceiver 1703 is further configured to add the baseband signals of the filtered first system and the second system, and then transmit the baseband signals.

In FIG. 17, a bus interface may also be included, and the bus interface may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1701 and various circuit links of the memory represented by the memory 1702. Together. The bus interface can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.

One of ordinary skill in the art will appreciate that all or part of the steps in implementing the above-described embodiments can be accomplished by a program that can be stored in a computer readable storage. In the medium, the storage medium is a non-transitory medium, such as random access memory, read only memory, flash memory, hard disk, solid state hard disk, magnetic tape (English: magnetic tape), floppy disk (English: Floppy disk), optical disc (English: optical disc) and any combination thereof.

The present invention has been described with reference to the respective flowcharts and block diagrams of the method and apparatus of the embodiments of the invention. It will be understood that each flow and block of the flowchart illustrations. FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. A device that implements the functions specified in one or more blocks of a flowchart or a plurality of flows and block diagrams.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A communication method between time-frequency systems, characterized in that it comprises:

Determining, by the base station, interference power information of the first system to a spectrum boundary of the first system and the second system,

Determining, by the base station, a signal transmission mode of the terminal connected to the second system according to the interference power information, where the signal transmission mode includes an original signal transmission mode and an anti-interference mode of the second system;

Transmitting, by the base station, the signal transmission mode to the terminal of the second system;
The method of claim 1 wherein said interference power information is an interference power or interference power ratio.
The method of claim 2, wherein the base station determines interference power information of the first system to a spectrum boundary of the second system between the first system and the second system, including:

Obtaining, by the base station, a first received power of each subcarrier on the M1 subcarriers of the first system at the spectrum interface, where M1 is a positive integer;

Obtaining, by the base station, interference power of the first system to a spectrum boundary of the second system between the first system and the second system, based on a first received power of the first system at each subcarrier, the interference power The information is interference power.
The method of claim 3 wherein said first received power is a sum of signal power, thermal noise power, and neighboring interference power.
The method according to claim 3, wherein the base station obtains interference power of the first system to the spectrum boundary of the second system at the first system and the second system based on the first received power of each of the subcarriers ,include:

The base station performs weighted summation of the first received power of the first system on each of the subcarriers to obtain interference power of the first system to the second system at the spectrum boundary; or

The base station multiplies the first received power of the each subcarrier by the first system and multiplies the preset power to obtain the interference power of the first system to the second system at the spectrum boundary.
The method of claim 2, wherein the base station determines interference power information of the first system to a spectrum boundary of the second system between the first system and the second system, including:

Obtaining, by the base station, a second received power of each subcarrier in the spectrum used by the second system in the second system;

Calculating, by the base station, an average value of the second received power on the M2 subcarriers at the spectrum interface and the second system in the second system based on the second received power of the second system at each subcarrier a ratio of an average of the second received powers on the M3 subcarriers at a non-spectral boundary of the system and the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, The interference power information is an interference power ratio, and both M2 and M3 are positive integers.
The method of claim 2, wherein the base station determines interference power information of the first system to a spectrum boundary of the second system between the first system and the second system, including:

The base station obtains a third received power of each subcarrier on the M4 subcarriers of the first system at the spectrum interface and each of the M3 subcarriers of the second system at the non-spectral boundary of the first system and the second system The second received power of the carrier, M3 is a positive integer;

Determining, by the base station, a leakage power of each subcarrier on the M2 subcarriers of the second system at the spectrum boundary based on a third received power of each subcarrier of the first system on the M4 subcarriers;

Calculating, by the base station, a second reception of the second system on the M3 subcarriers based on a second received power of each subcarrier of the M3 subcarriers at a non-spectral boundary of the first system and the second system Average value of power;

The base station sums the leakage power received by each subcarrier on the M2 subcarriers and the average value of the second received power on the M3 subcarriers, respectively, to obtain a second system on the M2 subcarriers. Second received power of each subcarrier;

Calculating, by the base station, an average value of the second received power on the M2 subcarriers at the spectrum interface and the second system in the second system based on the second received power of the second system at each subcarrier a ratio of an average of the second received powers on the M3 subcarriers at a non-spectral boundary of the system and the second system, resulting in the first system at the spectral interface of the second system The interference power ratio, wherein the interference power information is an interference power ratio, and M2, M3, and M4 are positive integers.
The method according to claim 6 or 7, wherein the second received power is a sum of thermal noise power, neighboring interference power, and leakage power.
The method of claim 7 wherein said third received power is a sum of signal power and neighboring interference power.
The method according to any one of claims 1 to 9, wherein the base station determines a signal transmission mode of the terminal connected to the second system based on the interference power information, including:

The base station keeps the signal transmission mode of the terminal connected to the second system unchanged when the interference power information is not greater than a preset threshold;

When the interference power information is greater than a preset threshold, the base station determines that the signal transmission mode of the terminal connected to the second system is an anti-interference mode.
The method of claim 10 wherein said anti-interference mode comprises any combination of the following:

Elevating a transmit power of a plurality of subcarriers of the second system at the spectral interface;

Using a low order modulation technique on several subcarriers at the spectral interface;

The same or similar data is transmitted on several subcarriers at the spectral interface.
A communication device, comprising:

a determining unit, configured to determine interference power information of the first system to a spectrum boundary of the second system at the first system and the second system,

a processing unit, configured to determine, according to the interference power information, a signal transmission mode of a terminal connected to the second system, where the signal transmission mode includes an original signal transmission mode and an anti-interference mode of the second system;

a sending unit, configured to notify the terminal of the signal transmission mode to the terminal of the second system;
The apparatus of claim 12 wherein said interference power information is an interference power or interference power ratio.
The apparatus of claim 13 wherein said determining unit is in determining said When the first system is in the interference power information of the second system at the spectrum boundary of the first system and the second system, specifically:

Obtaining a first received power of each subcarrier on the M1 subcarriers of the first system at the spectrum interface, where M1 is a positive integer;

Obtaining interference power of the first system to a spectrum boundary of the second system at the first system and the second system based on a first received power of the first system at each subcarrier, the interference power information To interfere with power.
The apparatus according to claim 14, wherein said first received power is a sum of signal power, thermal noise power, and neighboring interference power.
The apparatus according to claim 14, wherein said determining unit obtains a spectral boundary of said first system and said second system between said first system and said second system based on said first received power of said each subcarrier When the interference power is used, it is specifically used to:

And performing weighted summation of the first received power of the first system on each of the subcarriers to obtain interference power of the first system to the second system at the spectrum boundary; or

The first system adds the first received power of each subcarrier and multiplies the preset power to obtain the interference power of the first system to the second system at the spectrum boundary.
The apparatus according to claim 13, wherein said determining unit determines the interference power information of said first system to said second system at a spectral boundary of said first system and said second system, Specifically used for:

Obtaining a second received power of each subcarrier in the spectrum used by the second system in the second system;

Calculating an average of the second received power of the second system on the M2 subcarriers at the spectral interface based on the second received power of the second system at each subcarrier, and the second system is at the first a ratio of an average of the second received powers on the M3 subcarriers of the system and the non-spectral interface of the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, wherein The interference power information is an interference power ratio, and both M2 and M3 are positive integers.
The apparatus according to claim 13, wherein said determining unit determines interference power of said first system to said second system at a spectral boundary of said first system and said second system When the rate information is used, it is specifically used to:

Obtaining a third received power of each subcarrier on the M4 subcarriers of the first system at the spectral interface and each subcarrier on the M3 subcarriers of the second system at the non-spectral boundary of the first system and the second system Second received power, M3 is a positive integer;

Determining a leakage power of each subcarrier on the M2 subcarriers of the second system at the spectrum boundary based on a third received power of each subcarrier of the first system on the M4 subcarriers;

Calculating a second received power of the second system on the M3 subcarriers based on a second received power of each subcarrier on the M3 subcarriers at a non-spectral boundary of the first system and the second system by the second system average value;

And respectively summing, by the second system, the leakage power received by each subcarrier on the M2 subcarriers and the average value of the second received power on the M3 subcarriers, to obtain a second system on the M2 subcarriers. Second received power of the subcarriers;

Calculating an average of the second received power of the second system on the M2 subcarriers at the spectral interface based on the second received power of the second system at each subcarrier, and the second system is at the first a ratio of an average of the second received powers on the M3 subcarriers of the system and the non-spectral interface of the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, wherein The interference power information is an interference power ratio, and M2, M3, and M4 are positive integers.
The apparatus according to claim 17 or 18, wherein said second received power is a sum of thermal noise power, neighboring interference power, and leakage power.
The apparatus of claim 18 wherein said third received power is a sum of signal power and neighboring interference power.
The device according to any one of claims 12 to 20, wherein the processing unit is configured to: when determining a signal transmission mode of the terminal connected to the second system based on the interference power information, specifically:

When the interference power information is not greater than a preset threshold, the signal transmission mode of the terminal connected to the second system remains unchanged;

When the interference power information is greater than a preset threshold, determining that a signal transmission mode of the terminal connected to the second system is an anti-interference mode.
The apparatus of claim 21 wherein said anti-interference mode comprises any combination of the following:

Elevating a transmit power of a plurality of subcarriers of the second system at the spectral interface;

Using a low order modulation technique on several subcarriers at the spectral interface;

The same or similar data is transmitted on several subcarriers at the spectral interface.
A network device, the network device comprising: a processor and a transceiver:

The processor is configured to determine interference power information of the first system to a spectrum boundary of the second system between the first system and the second system, and determine, according to the interference power information, access to the second system a signal transmission mode of the terminal, where the signal transmission mode includes an original signal transmission mode and an anti-interference mode of the second system;

The transceiver is configured to notify the signal transmission mode notification to a terminal of the second system;
The network device according to claim 23, wherein the interference power information is an interference power or interference power ratio.
The network device according to claim 24, wherein said processor determines interference power of said first system to said second system at a spectral boundary of said first system and said second system When information is used, it is specifically used to:

Obtaining a first received power of each subcarrier on the M1 subcarriers of the first system at the spectrum interface, where M1 is a positive integer;

Obtaining interference power of the first system to a spectrum boundary of the second system at the first system and the second system based on a first received power of the first system at each subcarrier, the interference power information To interfere with power.
The network device according to claim 25, wherein said first received power is a sum of signal power, thermal noise power, and neighboring interference power.
The network device according to claim 24, wherein said processor obtains a first system to said second system in said first system and said first based on said first received power of said each subcarrier When the interference power of the spectrum boundary of the two systems is used, it is specifically used to:

And performing weighted summation of the first received power of the first system on each of the subcarriers to obtain interference power of the first system to the second system at the spectrum boundary; or

The first system adds the first received power of each subcarrier and multiplies the preset power to obtain the interference power of the first system to the second system at the spectrum boundary.
The network device according to claim 24, wherein said processor is operative to determine interference power information of said first system at a spectral boundary of said first system and said second system Specifically for:

Obtaining a second received power of each subcarrier in the spectrum used by the second system in the second system;

Calculating an average of the second received power of the second system on the M2 subcarriers at the spectral interface based on the second received power of the second system at each subcarrier, and the second system is at the first a ratio of an average of the second received powers on the M3 subcarriers of the system and the non-spectral interface of the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, wherein The interference power information is an interference power ratio, and both M2 and M3 are positive integers.
The network device according to claim 24, wherein said processor is operative to determine interference power information of said first system at a spectral boundary of said first system and said second system Specifically for:

Obtaining a third received power of each subcarrier on the M4 subcarriers of the first system at the spectral interface and each subcarrier on the M3 subcarriers of the second system at the non-spectral boundary of the first system and the second system Second received power, M3 is a positive integer;

Determining a leakage power of each subcarrier on the M2 subcarriers of the second system at the spectrum boundary based on a third received power of each subcarrier of the first system on the M4 subcarriers;

Calculating a second received power of the second system on the M3 subcarriers based on a second received power of each subcarrier on the M3 subcarriers at a non-spectral boundary of the first system and the second system by the second system average value;

And summing, respectively, the leakage power received by each second carrier on the M2 subcarriers and the average value of the second received power on the M3 subcarriers, to obtain a second system in the a second received power of each subcarrier on the M2 subcarriers;

Calculating an average of the second received power of the second system on the M2 subcarriers at the spectral interface based on the second received power of the second system at each subcarrier, and the second system is at the first a ratio of an average of the second received powers on the M3 subcarriers of the system and the non-spectral interface of the second system, to obtain an interference power ratio of the first system to the second system at the spectral boundary, wherein The interference power information is an interference power ratio, and M2, M3, and M4 are positive integers.
The network device according to claim 28 or 29, wherein the second received power is a sum of thermal noise power, neighboring interference power, and leakage power.
The network device according to claim 29, wherein said third received power is a sum of signal power and neighboring interference power.
The network device according to any one of claims 23 to 31, wherein the processor is configured to: when determining a signal transmission mode of the terminal connected to the second system based on the interference power information, specifically:

When the interference power information is not greater than a preset threshold, the signal transmission mode of the terminal connected to the second system remains unchanged;

When the interference power information is greater than a preset threshold, determining that a signal transmission mode of the terminal connected to the second system is an anti-interference mode.
The network device according to claim 32, wherein said anti-interference mode comprises any combination of the following:

Elevating a transmit power of a plurality of subcarriers of the second system at the spectral interface;

Using a low order modulation technique on several subcarriers at the spectral interface;

The same or similar data is transmitted on several subcarriers at the spectral interface.