WO2018120172A1

WO2018120172A1 - Signal transmitting method and network device

Info

Publication number: WO2018120172A1
Application number: PCT/CN2016/113846
Authority: WO
Inventors: 高珑珑; 周宝龙
Original assignee: 华为技术有限公司
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-07-05
Also published as: CN110050493A

Abstract

Disclosed in the embodiment of the present invention are a signal transmitting method and a network device, capable of making a signal transmission strategy according to the actual situation of a network, thus facilitating the transmission of a signal. The method comprises: a first network device acquires receipt information of a reference signal transmitted between the first network device and a second network device, the receipt information comprising strength information of receiving the reference signal, and current sub-frame ratio of the first network device and the current sub-frame ratio of the second network device being different; the first network device determines, according to the receipt information, the interference intensity of the first network device to the second network device; and the first network device determines, according to the relationship between the magnitude of the interference intensity and interference threshold, a transmission strategy for transmitting a downlink signal by the first network device.

Description

Method and network device for transmitting signals

Technical field

Embodiments of the present invention relate to the field of device communication technologies, and more particularly, to a method and network device for transmitting signals.

Background technique

In the Time Division Duplexing (TDD) mode, uplink and downlink shared spectrum resources, and the uplink and downlink subframes are divided in time to perform signal transmission. Different service models require different subframe ratios to be matched in order to optimize spectrum utilization. However, different subframe ratios of adjacent cells may cause cross interference between network devices. In order to avoid the phenomenon of cross interference, the neighboring cells currently use the same subframe ratio when transmitting signals. The method of transmitting signals has low flexibility and is not conducive to signal transmission.

Summary of the invention

The embodiment of the invention provides a method and a network device for transmitting signals, which can formulate a signal transmission strategy according to the actual situation of the network, which is beneficial to signal transmission.

A first aspect provides a method for transmitting a signal, the method comprising: acquiring, by a first network device, reception information of a reference signal transmitted between the first network device and the second network device, the receiving information including receiving the The strength information of the reference signal, the current subframe ratio of the first network device is different from the current subframe ratio of the second network device; the first network device determines, according to the received information, the first network device The interference strength of the network device is determined by the first network device according to the relationship between the interference strength and the interference threshold.

In the method of the embodiment of the present invention, the first network device can be configured according to the method between the first network device and the second network device, as compared with the prior art, in which the neighboring network device directly uses the same subframe ratio for signal transmission. The interference situation and the determination of the transmission strategy of the downlink signal can improve the flexibility of the signal transmitted by the network device and facilitate the efficient transmission of the signal.

In a possible implementation manner of the first aspect, the receiving information further includes receiving phase information of the reference signal, where the method further includes: determining, by the first network device, an interference channel direction according to the received information; Determine the relationship between the interference strength and the interference threshold And the sending, by the network device, the downlink signal sending policy, if the interference strength is greater than or equal to the interference threshold, determining that the downlink signal sending policy of the first network device is: when the first network device sends the downlink signal, in the interference channel A depression is formed in the direction.

In the method of the embodiment of the present invention, the sending policy may cancel the interference that the first network device sends the downlink signal to the second network device to receive the uplink signal. Similarly, the interference that the second network device sends the downlink signal to the first network device to receive the uplink signal may also be eliminated. In order to enable the first network device and the second network device to use an appropriate subframe ratio according to their own service requirements, the solution can improve the flexibility of the network device to select a subframe ratio, thereby improving the efficiency of signal transmission. Further, the solution is beneficial to the network device to implement dynamic time division duplex TDD technology.

In a possible implementation manner of the first aspect, the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy of the downlink signal sent by the first network device, including: if the interference strength is greater than or equal to the interference The threshold is determined to be: the first network device, when transmitting the downlink signal, occupies a frequency domain resource or a time domain resource different from the second network device receiving the uplink signal.

The method of the embodiment of the invention can improve the efficiency of signal transmission, and the method has high compatibility and applicability. Further, the solution is beneficial to the network device to implement dynamic time division duplex TDD technology.

In a possible implementation manner of the first aspect, the receiving information further includes receiving the phase information of the reference signal, and the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, the sending of the downlink signal sent by the first network device. The policy includes: the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy that the first network device sends a downlink signal to the first terminal device, where the first terminal device is configured by the first The network device determines based on the phase information.

In the method of the embodiment of the present invention, the first terminal device is determined by the first network device according to the phase information, and the first network device may determine a sending policy for sending a downlink signal to the first terminal device, where the method has high compatibility and applicability.

In a possible implementation manner of the first aspect, the method further includes: the first network device sends a downlink signal according to the sending policy, using a dynamic time division duplex TDD technology.

In this solution, the first network device can eliminate the interference between the first network device and the second network device by determining a transmission policy of the downlink signal, and the first network device can send the downlink signal by using the dynamic TDD technology, so as to facilitate the A network device can perform sub-frame matching according to actual service requirements. The dynamic adjustment of the ratio.

In a possible implementation manner of the first aspect, the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy of the downlink signal sent by the first network device, including: if the interference strength is less than the interference threshold, Determining the downlink signal transmission policy is: the first network device uses a different subframe ratio than the second network device when transmitting the downlink signal; or uses a dynamic time division duplex TDD technology.

In this solution, if the interference between the first network device and the second network device is less than the interference threshold, the first network device and the second network device may select a corresponding subframe ratio according to their own service requirements, and the signal may be improved. The efficiency of the transmission.

In a possible implementation manner of the first aspect, the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy of the downlink signal sent by the first network device, including: if the interference strength is greater than or equal to the interference Threshold, determining that the signal transmission strategy is: using the same subframe ratio as the second network device for signal transmission.

Compared with the prior art, the first network device and the second network device directly use the same subframe ratio, the method in the embodiment of the present invention first determines the interference strength between the first network device and the second network device. When the interference strength is greater than or equal to the interference threshold, the first network device and the second network device are used to perform signal transmission using the same subframe ratio, which can avoid blindly making the two network devices use the same subframe ratio.

In a possible implementation of the first aspect, the first network device acquires the receiving information of the reference signal transmitted between the first network device and the second network device, where the first network device sends the first network device to the second network device Transmitting the reference signal for the second network device to obtain the received information by receiving the reference signal; the first network device receiving the received information sent by the second network device.

In a possible implementation manner of the first aspect, the acquiring, by the first network device, the receiving information of the reference signal transmitted between the first network device and the second network device, includes: receiving, by the first network device, the second network device The reference signal is sent to obtain the received information.

A second aspect provides a method for transmitting a signal, the method comprising: sending, by a second network device, a first signal to a first network device, where the first signal is used by the first network device to acquire received information, so that the The first network device determines, according to the received information, a sending policy that the first network device sends a downlink signal, where the received information includes strength information of a reference signal transmitted between the first network device and the second network device, where the a current subframe ratio of a network device and the second network The current subframe ratio of the device is different.

In a possible implementation of the second aspect, the first signal is the reference signal.

In a possible implementation manner of the second aspect, before the second network device sends the first signal to the first network device, the method further includes: acquiring, by the second network device, the reference signal sent by the first network device The receiving information, the first signal is the receiving information.

In a possible implementation manner of the second aspect, the receiving information further includes receiving phase information of the reference signal.

In a third aspect, a network device is provided, the network device being a first network device, configured to perform the method in the first aspect and any possible implementation manner of the first aspect. In particular, the network device may comprise means for performing the method of the first aspect and any possible implementation of the first aspect.

In a fourth aspect, a network device is provided, where the network device is a second network device, and is configured to perform the method in any of the second aspect and the second aspect. In particular, the network device may comprise means for performing the method of the second aspect and any possible implementation of the second aspect.

In a fifth aspect, a network device is provided, where the network device is a first network device, including: a transceiver, a processor, and a memory, the transceiver, the processor and the memory are communicatively connected, wherein the memory is used for storing An instruction for executing the memory stored instructions, and execution of the instructions stored in the memory causes the processor to perform the method of any of the first aspect and the first aspect of the first aspect.

In a sixth aspect, a network device is provided, where the network device is a second network device, including: a transceiver, a processor, a memory, the transceiver, the processor and the memory are connected in communication, wherein the memory is used for storing An instruction, the processor is operative to execute the instruction stored by the memory, and execution of the instruction stored in the memory causes the processor to perform the method in any of the possible implementations of the second aspect and the second aspect above.

In a seventh aspect, a computer readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the method of the first aspect and any possible implementation of the first aspect.

In an eighth aspect, a computer readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the method of the second aspect and any possible implementation of the second aspect.

The method for transmitting a signal and the network device in the embodiment of the present invention, the first network device may determine, according to the relationship between the interference strength and the interference threshold of the second network device, the sending strategy of the downlink signal sent by the first network device, The solution has better flexibility, compatibility and applicability, is beneficial to the first network device to transmit signals, and further facilitates the use of dynamic TDD technology by the first network device.

DRAWINGS

1 is a wireless communication system suitable for use in an embodiment of the present invention.

2 is a schematic flow chart of an example of a method for transmitting a signal according to an embodiment of the present invention.

3 is a schematic flow chart of another example of a method for transmitting a signal according to an embodiment of the present invention.

4 is a schematic diagram of still another example of a method for transmitting a signal according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of still another example of a method for transmitting a signal according to an embodiment of the present invention.

FIG. 6 is a schematic block diagram of an example of a network device according to an embodiment of the present invention.

FIG. 7 is a schematic block diagram of another example of a network device according to an embodiment of the present invention.

FIG. 8 is a schematic block diagram of still another example of a network device according to an embodiment of the present invention.

FIG. 9 is a schematic block diagram of still another example of a network device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example, Global System of Mobile communication ("GSM") system, Code Division Multiple Access (CDMA). ") Wideband Code Division Multiple Access ("WCDMA") system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), 5G, etc.

Various embodiments are described in connection with a terminal device in accordance with an embodiment of the present invention. Terminal equipment can also be called User Equipment ("UE"), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user Device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SIP") phone, a Wireless Local Loop (WLL) station, or a personal digital assistant (Personal Digital Assistant, Referred to as "PDA"), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a terminal device in a future 5G network.

It should be understood that in the embodiments of the present invention, the numbers "first" and "second" are only used to distinguish different objects, for example, and should not be construed as limiting the embodiments of the present invention.

It should be understood that the division of the circumstances, manners, and the like in the embodiments of the present invention are merely for convenience of description, and should not be specifically limited, and the features in the various aspects and modes may be combined without contradiction.

It should also be understood that the signals in the embodiments of the present invention include at least one of signaling and data. For example, the downlink signal may include at least one of downlink signaling and downlink data.

It should also be understood that the subframe ratio may be an uplink-downlink subframe ratio (for example, may be a UL/DL subframe ratio).

1 is a wireless communication system suitable for use in an embodiment of the present invention. The wireless communication system 100 includes a plurality of network devices. For example, as shown in FIG. 1, the wireless communication system 100 can include a first network device 110 and a second network device 120, and both the first network device 110 and the second network device 120 can Communicate with the terminal device through the wireless air interface. The first network device 110 and the second network device 120 can provide communication coverage for a particular geographic area and can communicate with terminal devices located within the coverage area. The first network device 110 or the second network device 120 may be a base station (Base Transceiver Station, abbreviated as "BTS") in a GSM system or a CDMA system, or may be a base station (NodeB) in a WCDMA system, or may be an LTE system. Evolved Node B ("eNB" or "eNodeB"), or a network device in a future 5G network, such as a Transmission Reception Point (TRP), a base station, a small base station device, etc. This embodiment of the present invention is not particularly limited.

It is assumed that the first network device 110 and the second network device 120 are adjacent. The 110 subframe ratio of the first network device is different from the subframe ratio of the second network device 120. Table 1 shows the subframe ratios of the first network device and the second network device. For convenience of explanation, the subframe of the first network device may be used. The ratio "represented as "first subframe ratio", the "subframe ratio of the second network device" can be recorded as "second subframe ratio". The first network device and the second network device There will be cross interference between them.

Table 1

As shown in Table 1, when the first network device transmits the downlink signal using the subframe numbered 3, the second network device receives the uplink signal using the subframe numbered 3. As shown in FIG. 1, the downlink signal sent by the first network device is mistaken by the second network device for receiving the uplink signal. Similarly, the downlink signal sent by the second network device is misinterpreted by the first network device as an uplink signal for receiving. This cross interference will have an impact on the uplink and downlink throughput.

In order to avoid cross interference between the network devices, in the prior art, network devices of neighboring cells use the same subframe ratio for signal transmission. Although this method can avoid cross interference between network devices, the method has low flexibility and poor applicability. If the service demand of the neighboring cell is different, the method may result in poor user experience of a certain cell or some cells.

In fact, the magnitude of the interference strength between network devices is related to the distance between network devices, whether there are obstacles between network devices, and network quality. Directly causing neighboring network devices to use the same subframe ratio for signal transmission. This method has low flexibility and is not conducive to efficient signal transmission by network devices.

In view of this, the embodiments of the present invention provide a method and a network device for transmitting a signal, and determining a downlink signal transmission strategy of the network device according to the relationship between the interference strength and the interference threshold between the adjacent network devices. Improving the flexibility of the network device to transmit signals facilitates efficient transmission of signals by network devices.

Hereinafter, a method for transmitting data according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 through 5.

2 and 3 are schematic flowcharts of a method for transmitting signals according to an embodiment of the present invention, showing detailed communication steps or operations of the method, but the steps or operations are merely examples, Other embodiments of the invention may also perform other operations or variations of the various operations of Figures 2 and 3. shape. Moreover, the various steps in FIGS. 2 and 3 can be performed in a different order than that presented in FIGS. 2 and 3, respectively, and it is possible to perform only some of the operations in FIGS. 2 and 3.

2 is a schematic flow chart of an example of a method for transmitting a signal according to an embodiment of the present invention. The method of an embodiment of the invention may be applied to a communication system, such as wireless communication system 100. As shown in FIG. 2, the method 200 includes:

S210: The first network device acquires the receiving information of the reference signal transmitted between the first network device and the second network device, where the current subframe ratio of the first network device is different from the current subframe ratio of the second network device. The second network device sends a first signal to the first network device, where the first signal is used by the first network device to obtain the received information.

Specifically, the receiving information may include receiving strength information of the reference signal, and the receiving information may further include receiving phase information of the reference signal. The manner in which the first network device obtains the received information may include multiple types. 3 is a schematic flow chart of another example of a method for transmitting a signal according to an embodiment of the present invention. As shown in Figure 3,

As an optional example, the S210 may include:

S211, the first network device sends the reference signal to the second network device, and correspondingly, the second network device obtains the received information by receiving the reference signal sent by the first network device;

S211b, the second network device sends the receiving information to the first network device, and correspondingly, the first network device receives the received information sent by the second network device (that is, the first signal is the received information, and The first signal is considered to carry the received information).

Specifically, the first network device may send a reference signal to the second network device, where the second network device may obtain the received information by measuring the reference signal, where the second network device may send the received information to the first network device, So that the first network device acquires the received information.

As an alternative example, the S210 may further include:

S212. The second network device sends the reference signal to the first network device. Correspondingly, the first network device obtains the received information by receiving the reference signal sent by the second network device.

Specifically, the first network device may receive the reference signal sent by the second network device, and acquire the received information of the reference signal.

It should be noted that the reference signal of the embodiment of the present invention is different from the reference signal in the prior art. The reference signal in the prior art includes a cell reference signal (Cell Reference Signal, CRS). And a Channel State Information-Reference Signal (CSI-RS) or the like. The "existing reference signal" can be referred to as the "first reference signal".

If the first reference signal is used to measure the interference strength between network devices, at least the following problems exist:

1. The CRS and CSI-RS reference signals are simultaneously transmitted on the same symbol on multiple cells, and there is no measurement opportunity;

2. The first reference signal is provided in each transmission time interval (TTI), and occupies excessive time-frequency resources. The measurement between the network devices in the embodiment of the present invention does not require such frequent measurement times. This will result in a waste of time-frequency resources.

In order to improve the utilization of time-frequency resources, the reference signal of the embodiment of the present invention is a reference signal dedicated to measurement between network devices. The "reference signal dedicated to measurement between network devices" can be referred to as "second reference signal".

Optionally, in the embodiment of the present invention, the transmission period of the second reference signal may be agreed between the network devices. So that the first network device can acquire the received information according to a certain period. The period can be 1 hour or 24 hours.

Optionally, the first network device may acquire the received information when it is idle. Optionally, when the first network device obtains the received information (that is, performs measurement between the network devices), the time-frequency resources occupied by the reference signal are not used by the terminal device, and the measurement period adopts a common change cycle time of the channel. To avoid excessive impact on the normal data transmission of the terminal device.

S220. The first network device determines, according to the received information, an interference strength of the first network device to the second network device.

As a possible implementation manner, the first network device may consider that the strength of the received reference signal indicated by the strength information included in the received information is the same as the interference strength (approximation), thereby determining the interference strength.

For example, if the first network device sends a reference signal to the second network device, the second network device receives the reference signal with an intensity of XdBm, and the second network device can receive the information to enable the first network device to learn that the second network device receives the reference signal. The received strength of the reference signal is XdBm, and the first network device can determine that the interference strength is XdBm.

For another example, the second network device sends a reference signal to the first network device, where the second network device sends the reference signal with a transmit power of YdBm, and the first network device receives the received strength ZdBm of the reference signal, and the first network device can learn Between the first network device and the second network device The path loss of the transmitted signal is (Y-Z) dBm. Assuming that the transmit power of the downlink signal sent by the first network device is DdBm, the first network device can determine that the interference strength is (D-Y+Z) dBm. Further, if the transmit power of the reference signal sent by the first network device is the same as the transmit power of the reference signal sent by the second network device, the first network device may determine that the interference strength is ZdBm.

S230. The first network device determines a sending policy of the downlink signal of the first network device according to the magnitude relationship between the interference strength and the interference threshold.

Compared with the prior art, the neighboring network device directly uses the same subframe ratio for signal transmission, and the method provided by the embodiment of the present invention determines the downlink signal transmission strategy according to the relationship between the interference strength and the interference threshold. High flexibility makes it easy for network devices to transmit signals efficiently.

Optionally, in the embodiment of the present invention, the S230 may include:

The first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy that the first network device sends a downlink signal to the first terminal device, where the first terminal device is configured by the first network device according to the phase Information is determined.

That is to say, the sending policy may be a sending policy for the first terminal device. The first terminal device is a terminal device corresponding to the second network device. The number of the first terminal devices may be one or more, which is not limited herein.

The sending, by the first network device, the downlink signal to the first terminal device may cause the second network device to receive the uplink signal, for example, the first network device sends a downlink signal to the first terminal, where the downlink signal receives the uplink signal from the second network device. The interference is greater than or equal to the first threshold, and the first threshold may be an interference threshold, or may be determined by the first network device according to the interference threshold. Therefore, the first network device may determine, according to the received information with the second network device, a transmission policy for transmitting the downlink signal to the first terminal device.

For example, it is assumed that the first network device determines that N (N>0) terminal devices in the first direction are N first terminal devices according to the phase information, that is, the first network device sends the N first terminal devices in the first direction. The downlink signal sent by the second network device to the uplink signal is greater than or equal to the first threshold. The first network device may determine, according to the received information, a downlink policy for sending the downlink signal to the N first terminal devices.

Further, it is assumed that the first network device has M neighboring network devices, and the first network device can perform network device measurement with the i-th (i=1, . . . , M) neighboring network devices, where the first network device According to the interference strength between the first network device and the i-th neighboring network device A size relationship between the interference thresholds is used to determine a transmission policy for transmitting a downlink signal to the terminal device corresponding to the i-th neighboring network device.

For example, it is assumed that the first network device has two adjacent network devices, which are a second network device and a third network device, respectively, and the first network device can perform measurement and reception information between the network devices and the third network device. The device performs measurement between network devices to obtain and receive information. The "received information between the first network device and the second network device is recorded as the first received information", and the "received information between the second network device and the third network device is recorded as the second received information". Assuming that the interference strength between the first network device and the two adjacent network devices is greater than or equal to the interference threshold, the first network device may determine the first terminal device according to the first received information, and determine the second terminal according to the second received information. device. The first network device may determine a transmission policy of the downlink signal sent to the first terminal device for canceling interference between the first network device and the second network device. The first network device may determine a transmission policy of the downlink signal sent to the second terminal device for canceling interference between the first network device and the third network device.

In the method of the embodiment of the present invention, the first network device may determine, for each neighboring network device of the multiple neighboring network devices, a sending policy for sending a downlink signal to the terminal device corresponding to each neighboring network device, where the method is beneficial. The first network device implements Dynamic Time Division Duplexing (TDD) technology.

Hereinafter, the first network device determines the transmission policy according to the magnitude relationship of the interference threshold according to the interference strength.

Situation 1,

If the interference strength is greater than or equal to the interference threshold, the transmission policy determined by the first network device can eliminate (evade or reduce) the interference that the first network device sends the downlink signal to the second network device to receive the uplink signal. Further, the transmission strategy that can be used to eliminate interference may include the following.

(1) The sending policy may include: when the downlink signal is sent by the first network device, forming a null in the direction of the interference channel.

Specifically, the received information may include phase information, and the first network device may determine the interference channel direction according to the received information. When transmitting the downlink signal, the first network device adjusts the weight of the downlink signal sent by each antenna array element, so that the side lobes or zero points of the beam are aligned with the interference channel direction, thereby forming a null trap in the interference channel direction to eliminate the first The interference that the network device sends the downlink signal to the second network device to receive the uplink signal.

For example, the first network device receives the reference signal sent by the second network device, and can learn the letter. The phase difference information θ from the transmission to the reception, and then the first network device adjusts the initial phase of the plurality of antenna signals transmitted by the first network device by adjusting the initial phase of the plurality of antenna signals transmitted by the first network device, and adds the phase of the propagation on the path. After the difference θ, the signal phases reaching the second network device are close to each other, and the interference energy of the downlink signal of the first network device to the second network device can be close to zero, that is, a null trap is formed.

4 is still another schematic flowchart of a method for transmitting a signal according to an embodiment of the present invention. As shown in FIG. 4, when the downlink signal is sent to the first terminal device, the first network device performs a nulling in the interference channel direction of the second network device (ie, the first network device aligns the zero point of the beam with the interference channel direction). For eliminating interference between the first network device and the second network device. Similarly, when the downlink signal is sent to the second terminal device, the first network device performs a nulling in the interference channel direction of the third network device, so as to cancel interference between the first network device and the third network device.

(2) The sending policy may include: when the downlink signal is sent by the first network device, occupying a time domain or a frequency domain resource different from the uplink signal received by the second network device.

Taking the different frequency domain resources as an example, if the second network device occupies the frequency domain resource A to receive the uplink signal, the first network device can occupy the frequency domain resource B to send the downlink signal. The frequency domain resource A and the frequency domain resource B are different, and the interference of the first network device to send the downlink signal to the first network device to receive the uplink signal can be eliminated (the second network device can be prevented from receiving the downlink signal sent by the first network device).

Further, the frequency domain resource A of the first network device is not used by the first terminal device, but may be used by the terminal device other than the first terminal device in the first network device. That is, the first network device sends a downlink signal to the terminal device other than the first terminal device, and does not cause strong interference to the second network device to receive the uplink signal. Therefore, the frequency domain resource A of the first network device is not wasted.

For example, the first network device occupies the frequency domain resource B to send a downlink signal to the first terminal device, and the frequency domain resource A occupies the downlink signal to the second terminal device.

Taking the different time domain resources as an example, it is assumed that the second network device occupies the time domain resource C to receive the uplink signal, and the first network device occupies the time domain resource D to send the downlink signal, and the time domain resource C and the time domain resource D are different. The interference of the first network device to send the downlink signal to the first network device to receive the uplink signal is eliminated.

Taking Table 1 as an example, assuming that the interference strength between the first network device and the second network device is greater than the first threshold, the first network device sends the downlink signal to the second network in the subframes numbered 3 and 4. The uplink signal is received on the subframes numbered 3 and 4 to generate interference, and the first network device can transmit the data on the 3 and 4 subframes on the subframes numbered 5 and 6. Similar to the above description, the first network device may occupy the subframes numbered 3 and 4 when transmitting downlink signals to other terminal devices, for example, the second terminal device.

It should be understood that the first network device and the second network device can learn the time domain or frequency domain resources currently occupied by the other party. For example, the time domain resource or the frequency domain resource occupied by the first network device and the second network device are mutually negotiated, or the second network device may notify the first network device of the time domain resource or frequency occupied by the second network device by broadcasting. Domain resource. It should be noted that the time domain resource or the frequency domain resource occupied by the first network device and the second network device may include at least:

a. The frequency domain resources occupied by the first network device and the frequency domain resources occupied by the second network device do not overlap. For example, frequency domain resource A includes subcarriers numbered 0, 1, and 2, and frequency domain resource B includes subcarriers numbered 3, 4, and 5.

b. The time domain resources occupied by the first network device and the time domain resources occupied by the second network device do not overlap. For example, the time-frequency resource C is a radio frame or a subframe of number 0, and the time-frequency resource D is a radio frame or a subframe of subframe number 1.

It should be noted that, in the method of the embodiment of the present invention, the sending policy may cancel interference between the first network device and the second network device. Further, the sending policy may also reduce interference between the first network device and the second network device. For example, frequency domain resource A includes subcarriers numbered 0, 1, and 2, and frequency domain resource B includes subcarriers numbered 2, 3, and 4.

(3) The sending policy may include: the first network device and the second network device use the same subframe ratio for signal transmission. The service requirements of the two network devices are considered in a unified manner. For example, the service requirements of the two network devices are added and averaged together, and the subframe ratio adopted is determined together.

For example, it is assumed that the service requirement of the first network device is 2:1 in the downlink ratio, and the downlink demand ratio of the second network device is 1:2. The first network device and the second network device are found to have cross interference. If the intensity exceeds the threshold, the 1:1 subframe ratio can be used uniformly. Further, the inter-cell interference cooperative operation can be performed by using the transmission policy (3).

FIG. 5 is a schematic diagram showing still another example of a method for transmitting a signal according to an embodiment of the present invention. As shown in FIG. 5, it is assumed that there are seven network devices, which are A, B, C, D, E, F, and G, respectively, wherein the interference strength between A, B, C, and D is greater than or equal to For the interference threshold, A, B, C, and D can use the same subframe ratio, and the A, B, C, and D can be referred to as the first set. The interference strength between E, F, and G is greater than or equal to the interference threshold, and E, F, and G can use the same subframe. For the ratio, E, F, and G can be referred to as the second set. The interference strength between any of the network devices in the first set and any of the network devices in the second set is less than an interference threshold. The network devices in each set can perform unified dynamic TDD subframe matching type adjustment.

Case 2

If the interference strength is less than the interference threshold, determining that the downlink signal transmission strategy is: the first network device uses the current subframe ratio of the first network device when transmitting the downlink signal; or uses a dynamic TDD technology.

Specifically, since the interference strength between the first network device and the second network device is less than the interference threshold, the interference between the first network device and the second network device is low, and the first network device may send the downlink signal. The interference to the uplink signal of the second network device is not considered.

Compared with the prior art, the neighboring network device directly uses the same subframe ratio for signal transmission, and the embodiment of the present invention can determine the sending strategy according to the relationship between the interference strength between the network devices and the interference threshold. . If the interference strength between the first network device and the second network device is greater than or equal to the interference threshold, the transmission policy formulated by the first network device may be used to eliminate the interference. The transmission strategy capable of eliminating interference includes multiple types, and the first network device can select according to its actual situation. . If the interference strength between the first network device and the second network device is less than the interference threshold, the transmission policy formulated by the first network device may not consider interference between the first network device and the second network device. The method facilitates signal transmission by the network device. Further, the solution facilitates the network device to transmit signals using dynamic TDD technology.

A method for transmitting a signal according to an embodiment of the present invention is described above with reference to FIGS. 1 through 5. Hereinafter, a network device according to an embodiment of the present invention will be described with reference to FIGS. 6 through 9.

FIG. 6 is a schematic block diagram of an example of a network device according to an embodiment of the present invention. The network device 300 is a first network device, and the network device 300 shown in FIG. 6 includes:

The acquiring unit 310 is configured to acquire, by the first network device, the received information of the reference signal transmitted between the first network device and the second network device, where the received information includes strength information of receiving the reference signal, and the current subframe of the first network device is configured The determining unit 320 is configured to determine, according to the received information, the interference strength of the first network device to the second network device, where the determining unit 320 is further configured to: And determining, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy that the first network device sends the downlink signal.

Optionally, the receiving information further includes receiving phase information of the reference signal, and the determining unit 320 is further configured to: determine, according to the received information, an interference channel direction; the determining unit 320 is specifically configured to: If the interference strength is greater than or equal to the interference threshold, determining that the downlink signal sending policy of the first network device is: when the downlink signal is sent by the first network device, forming a null in the interference channel direction.

Optionally, the determining unit 320 is specifically configured to: if the interference strength is greater than or equal to the interference threshold, determine that the sending policy is: when the first network device sends the downlink signal, occupying the uplink signal with the second network device. Different frequency domain resources or time domain resources.

Optionally, the receiving information further includes receiving phase information of the reference signal, where the determining unit 320 is configured to: determine, according to the magnitude relationship between the interference strength and the interference threshold, that the first network device sends a downlink signal to the first terminal device. And a sending policy, wherein the first terminal device is determined by the first network device according to the phase information.

Optionally, the network device further includes: a sending unit, configured to send, according to the sending policy, a downlink signal by using a dynamic time division duplex TDD technology.

Optionally, the determining unit 320 is configured to: if the interference strength is less than the interference threshold, determine that the downlink signal sending policy is: when the first network device sends the downlink signal, use a different identifier from the second network device. Frame ratio; or use dynamic time division duplex TDD technology.

Optionally, the determining unit 320 is configured to: if the interference strength is greater than or equal to the interference threshold, determine that the signal sending policy is: performing signal transmission by using the same subframe ratio as the second network device.

Optionally, the network device further includes: a sending unit, configured to send the reference signal to the second network device, where the second network device obtains the received information by receiving the reference signal; The receiving information sent by the second network device is received.

Optionally, the acquiring unit 310 is specifically configured to: obtain the received information by receiving the reference signal sent by the second network device.

Specifically, the network device 300 should be a first network device in a method for transmitting a signal according to an embodiment of the present invention, and the network device 300 can include a unit for performing a method performed by the first network device in the above method. . For the sake of brevity, the units in the network device 300 and the other operations and/or functions described above are respectively omitted for the sake of brevity.

FIG. 7 is a schematic block diagram of another example of a network device according to an embodiment of the present invention. The network device 400 is a second network device, and the network device 400 shown in FIG. 7 includes:

The sending unit 410 is configured to send a first signal to the first network device, where the first signal is used by the first network device to obtain the received information, so that the first network device determines, according to the received information, that the first network device sends the downlink. a signaling policy of the signal; wherein the received information includes the first network design The strength information of the reference signal transmitted between the second network device and the second network device is different, and the current subframe ratio of the first network device is different from the current subframe ratio of the second network device.

Optionally, the first signal is the reference signal.

Optionally, the first signal is the received information, and the network device further includes: an acquiring unit, configured to obtain the received information by receiving the reference signal sent by the first network device.

Optionally, the receiving information further includes receiving phase information of the reference signal.

Specifically, the network device 400 should be a second network device in the method for transmitting signals according to an embodiment of the present invention, the network device 400 may include a unit for performing the method performed by the second network device in the above method. . The units in the network device 400 and the other operations and/or functions described above are respectively used in the corresponding processes in the foregoing methods, and are not described herein again for brevity.

FIG. 8 is a schematic block diagram of still another example of a network device according to an embodiment of the present invention. The network device 500 shown in FIG. 8 includes:

The transceiver 510, the processor 520, and the memory 530. The transceiver 550, the processor 520 and the memory 530 are connected in communication. The memory 530 is used to store instructions, and the processor 520 is configured to execute the instructions stored in the memory 530 to control the transceiver 510 to send and receive signals. The memory 530 may be configured in the processor 520 or may be independent of the processor 520.

The processor 520 is configured to: acquire receiving information of a reference signal transmitted between the first network device and the second network device, where the receiving information includes strength information of receiving the reference signal, and a current subframe of the first network device The matching ratio is different from the current subframe ratio of the second network device; determining, according to the received information, an interference strength of the downlink signal sent by the first network device to the uplink signal received by the second network device; according to the interference strength and the interference threshold The size relationship determines the sending strategy of the first network device to send the downlink signal.

Specifically, the network device 500 may correspond to a first network device for transmitting a signal according to an embodiment of the present invention, and the network device 500 may include a physical unit for performing a method performed by the first network device in the above method. . In addition, the physical units in the network device 500 and the other operations and/or functions described above are respectively used for the corresponding processes of the foregoing methods, and are not described herein again for brevity.

FIG. 9 is a schematic block diagram of another example of a network device according to an embodiment of the present invention. The network device 600 shown in FIG. 9 includes:

The transceiver 610, the processor 620, and the memory 630. The transceiver 660, the processor 620 and the memory 630 are connected in communication, and the memory 630 is used to store instructions, and the processor 620 is configured to execute The memory 630 stores instructions stored to control the transceiver 610 to send and receive signals. The memory 630 may be configured in the processor 620 or may be independent of the processor 620.

The processor 620 is configured to: control the transceiver 610 to send a first signal to the first network device, where the first signal is used by the first network device to acquire the received information, so that the first network device determines the first information according to the received information. a network device that sends a downlink signal transmission policy, where the received information includes strength information of a reference signal transmitted between the first network device and the second network device, a current subframe ratio of the first network device, and the The current subframe ratio of the second network device is different.

Specifically, the network device 600 may correspond to a second network device for transmitting a signal according to an embodiment of the present invention, and the network device 600 may include a physical unit for performing a method performed by the second network device in the above method. . In addition, the physical units in the network device 600 and the other operations and/or functions described above are respectively used for the corresponding processes of the foregoing methods, and are not described herein again for brevity.

It should be understood that the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The processor may be a central processing unit (CPU), the processor may be another general-purpose processor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). ), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It should also be understood that the memory in embodiments of the invention may be a volatile memory or a non-volatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory. Volatility The memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM may be used, such as static random access memory (SRAM). ), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronization Dynamic Random Access Memory (ESDRAM), Synchronous Connection Dynamic Random Access Memory (SDRAM) and Direct Memory Bus Random Memory (DR RAM). It should be noted that the system and system described herein The memory of the method is intended to comprise, without being limited to, these and any other suitable types of memory.

It should also be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information. It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately while 10 is stored in A. And B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The steps of the method for transmitting an uplink signal disclosed in the embodiment of the present invention may be directly implemented as a hardware processor execution completion, or may be performed by a combination of hardware and software in a processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

Embodiments of the present invention also provide a computer readable storage medium storing one or more programs, the one or more programs including instructions that are portable electronic devices that include a plurality of applications When executed, the portable electronic device can be caused to perform the method of the embodiment shown in Figures 2 through 5.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. Professionals can use different parties for each specific application The described functionality is implemented, but such implementation should not be considered to be beyond the scope of the embodiments of the invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the embodiments of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution, may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The foregoing is only a specific embodiment of the embodiments of the present invention, but the scope of protection of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily use the technical scope disclosed in the embodiments of the present invention. All changes or substitutions are contemplated to be within the scope of the embodiments of the invention. Therefore, the scope of protection of the embodiments of the present invention should be determined by the scope of the claims.

Claims

A method for transmitting a signal, the method comprising:

Receiving, by the first network device, the receiving information of the reference signal transmitted between the first network device and the second network device, where the receiving information includes receiving strength information of the reference signal, where the first network device is current The subframe ratio is different from the current subframe ratio of the second network device;

Determining, by the first network device, an interference strength of the first network device to the second network device according to the received information;

The first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy that the first network device sends a downlink signal.
The method according to claim 1, wherein the receiving the information further comprises receiving phase information of the reference signal, the method further comprising:

Determining, by the first network device, an interference channel direction according to the received information;

Determining, by the first network device, a sending policy for sending the downlink signal by the first network device according to the relationship between the interference strength and the interference threshold, including:

If the interference strength is greater than or equal to the interference threshold, determining that the downlink signal sending policy of the first network device is: when the first network device sends the downlink signal, forming a null in the interference channel direction.
The method according to claim 1, wherein the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy for sending the downlink signal by the first network device, including:

If the interference strength is greater than or equal to the interference threshold, determining that the sending policy is: when the first network device sends the downlink signal, occupying a frequency domain resource or time different from the second network device receiving the uplink signal. Domain resource.
The method according to any one of claims 1 to 3, wherein the receiving information further comprises receiving phase information of the reference signal,

Determining, by the first network device, a sending policy for sending the downlink signal by the first network device according to the relationship between the interference strength and the interference threshold, including:

Determining, by the first network device, a sending policy that the first network device sends a downlink signal to the first terminal device according to the magnitude of the interference threshold, where the first network device is configured by the first terminal device The first network device is determined based on the phase information.
Method according to any one of claims 1 to 4, characterized in that the method Also includes:

The first network device sends a downlink signal according to the sending policy, using a dynamic time division duplex TDD technology.
The method according to any one of claims 1 to 5, wherein the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending strategy for sending the downlink signal by the first network device. ,include:

If the interference strength is less than the interference threshold, determining that the downlink signal transmission policy is: when the first network device sends a downlink signal,

Using a different subframe ratio than the second network device; or

Use dynamic time division duplex TDD technology.
The method according to claim 1, wherein the first network device determines, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy for sending the downlink signal by the first network device, including:

And if the interference strength is greater than or equal to the interference threshold, determining that the signaling policy is: performing signal transmission using the same subframe ratio as the second network device.
The method according to any one of claims 1 to 7, wherein the first network device acquires receiving information of a reference signal transmitted between the first network device and the second network device, including :

The first network device sends the reference signal to the second network device, where the second network device obtains the received information by receiving the reference signal;

The first network device receives the received information sent by the second network device.
The method according to any one of claims 1 to 7, wherein the first network device acquires the receiving information of the reference signal transmitted between the first network device and the second network device, including:

The first network device acquires the received information by receiving the reference signal sent by the second network device.
A network device, where the network device is a first network device, and the network device includes:

An acquiring unit, configured to acquire, by using the received information of the reference signal transmitted between the first network device and the second network device, where the received information includes strength information of receiving the reference signal, where the first network device is currently The subframe ratio is different from the current subframe ratio of the second network device;

a determining unit, configured to determine, according to the received information, an interference strength of the first network device to the second network device;

The determining unit is further configured to: determine, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy that the first network device sends a downlink signal.
The network device according to claim 10, wherein the receiving information further comprises receiving phase information of the reference signal,

The determining unit is further configured to: determine an interference channel direction according to the received information;

The determining unit is specifically configured to: if the interference strength is greater than or equal to the interference threshold, determine that the downlink signal sending policy of the first network device is: when the first network device sends a downlink signal, A null is formed in the direction of the interference channel.
The network device according to claim 10, wherein the determining unit is configured to: if the interference strength is greater than or equal to the interference threshold, determine that the sending policy is: the first network device is transmitting When the downlink signal is used, the frequency domain resource or the time domain resource different from the uplink signal received by the second network device is occupied.
The network device according to any one of claims 10 to 12, wherein the receiving information further comprises receiving phase information of the reference signal,

The determining unit is configured to: determine, according to the magnitude relationship between the interference strength and the interference threshold, a sending policy that the first network device sends a downlink signal to the first terminal device, where the first terminal device is configured by The first network device determines the phase information according to the phase information.
The network device according to any one of claims 10 to 13, wherein the network device further comprises:

And a sending unit, configured to send, according to the sending policy, a downlink signal by using a dynamic time division duplex TDD technology.
The network device according to any one of claims 10 to 14, wherein the determining unit is configured to: if the interference strength is less than the interference threshold, determine that the downlink signal sending policy is: When the first network device sends a downlink signal,

Using a different subframe ratio than the second network device; or

Use dynamic time division duplex TDD technology.
The network device according to claim 10, wherein the determining unit is configured to: if the interference strength is greater than or equal to the interference threshold, determine that the signal sending policy is: use and the second network The same subframe ratio of the device is used for signal transmission.
The network device according to any one of claims 10 to 16, wherein the network device further comprises:

a sending unit, configured to send the reference signal to the second network device, where the second network device obtains the received information by receiving the reference signal;

The acquiring unit is specifically configured to: receive the received information sent by the second network device.
The network device according to any one of claims 10 to 16, wherein the acquiring unit is configured to: obtain the received information by receiving the reference signal sent by the second network device.
A method for transmitting a signal, the method comprising:

The second network device sends a first signal to the first network device, where the first signal is used by the first network device to acquire the received information, so that the first network device determines the first network according to the received information. The sending policy of the device sending the downlink signal;

The receiving information includes strength information of a reference signal transmitted between the first network device and the second network device, a current subframe ratio of the first network device, and a current current of the second network device. The sub-frame ratio is different.
The method of claim 19 wherein said first signal is said reference signal.
The method according to claim 19, wherein before the second network device sends the first signal to the first network device, the method further includes:

Receiving, by the second network device, the received information by receiving the reference signal sent by the first network device;

The first signal is the received information.
The method according to any one of claims 19 to 21, wherein the receiving the information further comprises receiving phase information of the reference signal.
A network device, wherein the network device is a second network device, and the network device includes:

a sending unit, configured to send a first signal to the first network device, where the first signal is used by the first network device to acquire the received information, so that the first network device determines the first according to the received information a transmission strategy for the network device to send a downlink signal;

The receiving information includes strength information of a reference signal transmitted between the first network device and the second network device, a current subframe ratio of the first network device, and the second network. The current subframe ratio of the network device is different.
The network device of claim 23, wherein the first signal is the reference signal.
The network device according to claim 23, wherein the network device further comprises:

An acquiring unit, configured to acquire the received information by receiving the reference signal sent by the first network device;

The first signal is the received information.
The network device according to any one of claims 23 to 25, wherein the receiving information further comprises receiving phase information of the reference signal.