CN110831021B

CN110831021B - Signal transmission method and communication equipment

Info

Publication number: CN110831021B
Application number: CN201810890619.2A
Authority: CN
Inventors: 柯颋; 徐晓东; 邵华; 刘建军; 金婧; 侯雪颖; 夏亮; 李天星
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-08-07
Filing date: 2018-08-07
Publication date: 2023-03-28
Anticipated expiration: 2038-08-07
Also published as: CN110831021A

Abstract

The embodiment of the invention provides a signal transmission method and communication equipment, wherein the method comprises the following steps: determining a start transmission condition of the first reference signal and/or determining a stop transmission condition of the first reference signal according to at least one of historical transmission information of the reference signal, listening information of the reference signal, the first trigger condition and the second trigger condition. In the embodiment of the invention, the types of the first reference signals comprise a first type and a second type, wherein the first type of the first reference signals is used for triggering other communication devices to execute interference management operation, and the second type of the first reference signals is used for indicating whether the atmospheric waveguide phenomenon disappears. By having the first reference signals of the first type and the second type, the communication device can be prevented from performing unnecessary interference management operations, and thus network resource utilization efficiency can be improved.

Description

Signal transmission method and communication equipment

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a signal transmission method and communication equipment.

Background

Referring to fig. 1, an atmospheric waveguide (atmospheric waveguide) phenomenon is likely to occur in an inland area where spring, summer and fall meet, or a coastal area in winter. When the atmospheric waveguide phenomenon occurs, a level with inverse temperature or water vapor sharply reduced along with the height exists in the troposphere, the troposphere is called a waveguide layer, and most radio wave radiation is limited in the waveguide layer to carry out super-refraction propagation. Beyond-the-horizon propagation allows radio signals to travel great distances and suffer from low path propagation losses.

For a cellular wireless communication system (e.g., a fourth generation mobile communication (4G) Long Term Evolution (LTE) system or a fifth generation mobile communication (5G) New wireless (New Radio, NR) system), when an air waveguide phenomenon occurs, a Downlink (DL) signal of a remote communication device will cause strong interference to uplink (Up Link, UL) data reception of a local communication device.

Referring to fig. 2, due to the existence of the atmospheric waveguide layer, after a DL signal transmitted by a far-end Interference station (Interference site or aggregation site or Interference site) propagates through a space over a very long distance (for example, tens of kilometers or hundreds of kilometers), the DL signal still has high energy, and falls within a UL signal receiving window of a local Interference station (visual site or Interference site), so that the DL signal causes strong Interference to UL data reception of a local communication device.

In a Time Division Long Term Evolution (TD-LTE) existing network, it is found that a large area of TD-LTE uplink is disturbed in many provinces such as the Jiangsu, anhui, hainan, henan, etc., the rise of uplink Interference noise (IOT) can reach 25dB, and Key Performance Indicators (KPI) such as Radio Resource Control (RRC) connection establishment success rate are seriously deteriorated. The interfered cell mainly takes a rural F frequency band, the interference time is mainly concentrated in a range from 0 to 00.

In the conventional remote interference management method, after the first base station detects the RS sent by the second base station, the first base station also sends the RS although the first base station does not detect the remote interference feature. When the second base station senses the RS of the first base station, the second base station understands that it belongs to the interfering station of the first base station, and the second base station needs to perform interference backoff processing, but the first base station may not be interfered by the second base station, so the second base station does not need to perform interference backoff processing.

Therefore, in the conventional remote interference management method, the base station which does not need to perform the interference management operation originally performs the interference management operation, so that the utilization efficiency of network resources is low.

Disclosure of Invention

The embodiment of the invention provides a signal transmission method and communication equipment, and solves the problem of low network resource utilization efficiency caused by unnecessary interference management operation executed by the communication equipment.

According to a first aspect of the embodiments of the present invention, there is provided a signal transmission method, applied to a communication device, including: determining a starting transmission condition of the first reference signal and/or determining a stopping transmission condition of the first reference signal according to at least one of historical transmission information of the reference signal, interception information of the reference signal, a first trigger condition and a second trigger condition; wherein the types of the reference signals include: a first type and a second type.

Optionally, the condition for starting to transmit the first reference signal includes at least one of: if the first trigger condition is met, starting to send the first reference signal, wherein the type of the first reference signal is a first type; if the communication equipment does not send the reference signal and meets the first trigger condition, starting to send the first reference signal, wherein the type of the first reference signal is a first type; if the communication equipment is sending a second reference signal, the type of the second reference signal is a second type, and the first trigger condition is met, the sending of the second reference signal is terminated, the sending of the first reference signal is started, and the type of the first reference signal is a first type.

Optionally, the meeting of the first trigger condition means meeting at least one of the following conditions: the uplink interference strength index is higher than a first threshold value; in a time interval consisting of at least one Uplink Orthogonal Frequency Division Multiplexing (UL OFDM) symbol, interference has a time domain power ramp feature; in a time interval composed of at least one UL OFDM symbol, the difference of the interference strength indexes between the adjacent OFDM symbols is larger than a second threshold value.

Optionally, the condition for starting transmission of the first reference signal includes: if the communication equipment does not send the reference signal, and the intercepted reference signals sent by other communication equipment are of a first type, starting to send the first reference signal, and the type of the first reference signal is of a second type.

Optionally, the condition for starting to transmit the first reference signal includes at least one of: if the communication equipment does not send the reference signal of the first type and detects the reference signal sent by other communication equipment, starting to send the first reference signal, wherein the type of the first reference signal is the second type; if the communication equipment does not send the reference signal, and senses the reference signal sent by other communication equipment, and the type of the sensed reference signal sent by other communication equipment is a first type, starting to send the first reference signal, wherein the type of the first reference signal is a second type; and if the communication equipment does not send the reference signal, and listens the reference signal sent by other communication equipment, and the type of the listened reference signal sent by other communication equipment is a second type, starting to send the first reference signal, wherein the type of the first reference signal is the second type.

Optionally, the method further comprises at least one of: if the communication device determines to start sending the first reference signal and the communication device is currently sending a second reference signal, the communication device determines to terminate sending the second reference signal and starts sending the first reference signal; if the communication device determines to start transmitting the first reference signal, and the communication device is currently transmitting a second reference signal, and the types of the first reference signal and the second reference signal are different, the communication device determines to terminate transmitting the second reference signal and starts transmitting the first reference signal; if the communication device determines to start sending the first reference signal, and the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are the same, the communication device continues to send the first reference signal.

Optionally, the condition for stopping sending the first reference signal includes: if the communication device is transmitting the first reference signal and the second trigger condition is met, the communication device stops transmitting the first reference signal.

Optionally, the method further comprises: if the communication equipment monitors the reference signals sent by other communication equipment and the type of the monitored reference signals sent by other equipment is a first type, starting to execute the interference management operation; or, if the communication device is executing the interference management operation and the second trigger condition is met, ending the interference management operation.

Optionally, the interference management operation includes at least one of: reducing Downlink signal transmission power in at least one Downlink Orthogonal Frequency Division Multiplexing (DL OFDM) symbol; increasing a time domain Guard time interval (Guard Period, GP for short); transmission of signals in a specific DL OFDM symbol is prohibited.

Optionally, the meeting of the second trigger condition means meeting at least one of the following conditions: within a first time window, the communication device does not listen for a reference signal transmitted by any other communication device; within a second time window, the first trigger condition is not met and the communication device does not listen for a reference signal transmitted by any one of the other communication devices.

Optionally, the first type of reference signal and the second type of reference signal have a difference in characteristic parameters, the characteristic parameters including at least one of: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

Optionally, the method further comprises: determining a first characteristic parameter set and/or a second characteristic parameter set through at least one of prearranged Operation Administration and Maintenance (OAM) configuration and backhaul signaling indication of a backhaul line between communication devices; wherein the first characteristic parameter set and/or the second characteristic parameter set comprise characteristic parameters, and the characteristic parameters comprise at least one of the following parameters: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

Optionally, the method further comprises: when the characteristic parameters of the intercepted reference signals sent by other communication belong to a first characteristic parameter set, determining the type of the intercepted reference signals sent by the other communication to be a first type; and/or determining the type of the sensed reference signal transmitted by other communication to be the second type when the sensed characteristic parameter of the reference signal transmitted by other communication belongs to the characteristic parameter set of the reference signal of the second type.

Optionally, the method further comprises: when the communication equipment determines to send the first reference signal and the type of the first reference signal is a first type, determining a first characteristic parameter, wherein the first characteristic parameter belongs to a first characteristic parameter set; or, when the communication device determines to transmit the first reference signal and the first reference signal type is a second type, determining a second characteristic parameter, where the second characteristic parameter belongs to a second characteristic parameter set.

According to a second aspect of embodiments of the present invention, there is provided a communication apparatus including: a transceiver and a processor;

the processor is used for determining a starting transmission condition of the first reference signal and/or determining a stopping transmission condition of the first reference signal according to at least one of historical transmission information of the reference signal, interception information of the reference signal, a first trigger condition and a second trigger condition; wherein the types of the reference signals include: a first type and a second type.

Optionally, the condition for starting to transmit the first reference signal includes at least one of: if the first trigger condition is met, starting to send the first reference signal, wherein the type of the first reference signal is a first type; if the communication equipment does not send the reference signal and meets the first trigger condition, starting to send the first reference signal, wherein the type of the first reference signal is a first type; if the communication equipment is sending a second reference signal, the type of the second reference signal is a second type, and the first trigger condition is met, the sending of the second reference signal is terminated, and the sending of the first reference signal is started, and the type of the first reference signal is a first type.

Optionally, the meeting of the first trigger condition means meeting at least one of the following conditions: the uplink interference strength index is higher than a first threshold value; within a time interval consisting of at least one uplink orthogonal frequency division multiplexing, UL, OFDM, symbol, the interference has a time domain power ramp characteristic; and in a time interval consisting of at least one UL OFDM symbol, the difference of the interference strength indexes between the adjacent OFDM symbols is larger than a second threshold value.

Optionally, the condition for starting to transmit the first reference signal includes at least one of: if the communication equipment does not send the reference signal, and the intercepted reference signals sent by other communication equipment are of a first type, starting to send the first reference signal, and the type of the first reference signal is of a second type.

Optionally, the processor is further configured to determine to terminate sending the second reference signal and start sending the first reference signal if the communication device determines to start sending the first reference signal and the communication device is currently sending a second reference signal; if the communication device determines to start transmitting the first reference signal, and the communication device is currently transmitting a second reference signal, and the types of the first reference signal and the second reference signal are different, the communication device determines to terminate transmitting the second reference signal and starts transmitting the first reference signal; if the communication device determines to start sending the first reference signal, and the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are the same, the communication device continues to send the first reference signal.

Optionally, the processor is further configured to start to perform the interference management operation if the communication device listens to a reference signal sent by another communication device and the type of the heard reference signal sent by the another device is a first type; or, if the communication device is performing the interference management operation and the second trigger condition is satisfied, ending the interference management operation.

Optionally, the interference management operation includes at least one of: reducing downlink signal transmission power in at least one DL OFDM symbol; increasing a time domain GP; transmission of signals in a specific DL OFDM symbol is prohibited.

Optionally, the processor is further configured to determine the first characteristic parameter set and/or the second characteristic parameter set through at least one of pre-agreement, OAM configuration, and backhaul signaling indication between communication devices; wherein the first characteristic parameter set and/or the second characteristic parameter set comprise characteristic parameters, and the characteristic parameters comprise at least one of the following parameters: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

Optionally, the processor is further configured to determine, when the characteristic parameter of the reference signal sent by the intercepted other communication belongs to the first characteristic parameter set, the type of the intercepted reference signal sent by the other communication is a first type; and/or determining the type of the reference signal sent by the other communication to be heard as the second type when the characteristic parameter of the reference signal sent by the other communication to be heard belongs to the characteristic parameter set of the reference signal of the second type.

Optionally, the processor is further configured to determine a first characteristic parameter when the communication device determines to send the first reference signal and the first reference signal type is a first type, where the first characteristic parameter belongs to a first characteristic parameter set; or, when the communication device determines to transmit the first reference signal and the first reference signal type is a second type, determining a second characteristic parameter, where the second characteristic parameter belongs to a second characteristic parameter set.

According to a third aspect of embodiments of the present invention, there is provided another communication apparatus, including: a processor, a memory and a program of a signal transmission method stored on the memory and executable on the processor, the program of the signal transmission method realizing the steps of the signal transmission method as described in the first aspect when executed by the processor.

According to a fourth aspect of embodiments of the present invention, there is provided a computer-readable storage medium having stored thereon a program of a signal transmission method, which when executed by a processor, implements the steps of the signal transmission method according to the first aspect.

In the embodiment of the invention, two types of reference signals are set, wherein the first type of reference signal is used for triggering other communication equipment to execute interference management operation; while the second type of reference signal is only used to indicate whether the atmospheric wave guide phenomenon disappears. With two types of reference signals, the communication device can be prevented from performing unnecessary interference management operations, and thus network resource utilization efficiency can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.

FIG. 1 is a schematic view of the atmospheric waveguiding phenomenon;

FIG. 2 is a diagram illustrating interference in a remote communication device;

fig. 3 is a flowchart illustrating a conventional remote interference management method;

fig. 4 is one of application scenarios of the existing remote interference management method;

fig. 5 shows a second application scenario of the conventional remote interference management method;

fig. 6 is a schematic flowchart of a signal transmission method according to an embodiment of the present invention;

fig. 7 is a schematic diagram of state transition of a communication device according to an embodiment of the present invention;

FIG. 8 is a diagram of RS time domain resources;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present invention;

fig. 10 is a second schematic structural diagram of a communication 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 below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The techniques described herein are not limited to a Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) system, and may also be used for various wireless communication systems, such as a 5G NR system and its Evolution system, code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.

It is understood that the embodiment of the present invention is described by taking the 5G NR system as an example, and is also applicable to other systems, which are not described herein. Wherein the fifth generation (5G) wireless network is also known as the fifth generation mobile phone mobile communication standard, which is an extension beyond 4G. The 5G wireless network can utilize high carrier frequency and the number of antennas which are not available before, thereby greatly increasing the transmission speed of signaling. Furthermore, 5G may also incorporate any potential new 5G air interface, LTE and WiFi, thereby enabling a universal high coverage and seamless user experience.

The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership project" (3 rd Generation Partnership project,3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.

Referring to fig. 3, in order to solve the Interference problem caused by the atmospheric waveguide phenomenon, the prior art provides a Remote Interference Management (RIM) method. The process is as follows:

at time T0:

all communication devices (including the offender station and the victim station) listen to a specific Reference Signal (abbreviated RS); there is also a need to detect far-end interference signatures for potentially victim stations (e.g., communication devices with UL traffic present).

Time T1:

the atmospheric wave guide phenomenon occurs, and the DL signal transmitted by the interference station interferes the UL data reception of the interfered station.

And time T2:

the victim station detects the far-end interference signature and begins transmitting an RS informing potential offender stations of the necessary interference management operations.

And time T3:

t3-1: after the interference station detects the RS, the interference management operation is executed;

t3-2: if the disturbing station detects the RS but does not detect the far-end interference characteristic, the disturbing station also needs to start to reversely send the RS;

wherein the interference management operation comprises at least one of the following methods:

(1) Reducing downlink signal transmission power in at least one downlink DL Orthogonal Frequency Division Multiplexing (OFDM) symbol;

(2) Increasing a time domain Guard interval (GP);

(3) Prohibiting transmission of a signal in a particular downlink OFDM symbol;

after the interference management operation is performed by the interference applying station, the problem of interference of the interference applying station on UL data of the interfered station can be obviously relieved.

It should be noted that the conditions for the communication device (including the offender station and the victim station) to stop transmitting the RS are: no RS signal is heard for a given duration. After the time T3, all the communication devices can hear the RS signals transmitted by the other communication devices as long as the atmospheric wave guide phenomenon does not disappear, and therefore the RS stop transmission condition is not triggered. Furthermore, all communication devices (including the offender and victim stations) continue to transmit RSs, thereby ensuring that interference management operations can be continuously maintained.

Only when any one of the communication devices cannot sense the DL signal (including RS) transmitted by the other communication device within the UL signal reception window after the atmospheric waveguide phenomenon disappears, the remote interference management method shown in fig. 3 may be terminated, including: (1) the interference applying station finishes the interference backspacing process; and (2) stopping transmitting the RS by the interference applying station and the interference receiving station.

Referring to fig. 4, an application scenario of an existing remote interference management method is shown. When the atmospheric wave guide phenomenon occurs, the IOT of all communication devices exceeds a preset threshold, and all communication devices regard themselves as victim stations and start to transmit RSs. All communication equipment can detect the RS all the time, and is in an interference backspacing state all the time until the atmospheric waveguide phenomenon disappears.

It should be noted that, in the application scenario of fig. 4, since the IOT of the interfering station exceeds the preset threshold, the interfering station considers itself to be also the interfered station, and after the Shi Rao station senses the RS, the RS will also be sent in the reverse direction, which is not necessary.

Referring to fig. 5, an application scenario of another existing remote interference management method is shown. When the atmospheric wave guide phenomenon occurs, the IOT of only a part of communication devices (such as gNB # 1) exceeds a preset threshold, then the communication devices identify themselves as interfered stations and start to transmit RS, and other communication devices (such as gNB # 2/3/4) start interference management operation accordingly. While the IOT of other communication devices (e.g., gNB # 2/3/4) does not exceed the preset threshold and does not initiate the transmission behavior of the RS.

After the gNB #2/3/4 senses the RS, the RS cannot be sent reversely, after the gNB #1 sends the RS, the RS sent by other communication equipment cannot be sensed within a preset time period, and then the gNB #1 can mistakenly judge that the atmospheric waveguide phenomenon disappears, so that the RS is stopped being sent. Then, since the gNB #2/3/4 cannot sense the RS, the interference back-off procedure is terminated, and the gNB #1 is affected by the far-end interference. At this time, the gNB #1 retransmits the RS again. At this time, the far-end interference phenomenon will be repeated from the perspective of the gNB #1, forming a "ping-pong effect".

In order to avoid the ping-pong effect, the interfering station gNB #2/3/4 needs to send the RS in the reverse direction after sensing the RS. When the atmospheric waveguide occurs, all the communication equipment can detect the RS all the time, and the communication equipment is in an interference backspacing state all the time until the atmospheric waveguide phenomenon disappears.

It should be noted that, in the application scenario of fig. 5, an operation of the interfering station listening to the RS and transmitting the RS in the reverse direction is necessary.

In the application scenario shown in fig. 5, after the interfering station gNB #2/3/4 detects the RS transmitted by the interfered station gNB #1, shi Rao station gNB #2/3/4 does not detect the far-end interference feature, and then gNB #2/3/4 also needs to transmit RS.

After gNB #1 senses the RS transmitted by gNB #2/3/4, gNB #1 understands that it is also a jamming station of other communication devices, and therefore, gNB #1 will also perform interference management operations. The UL signal of the gNB #2/3/4 is indeed interfered by the DL signal from the gNB #1, but because the cumulative IOT rise is small, the gNB #2/3/4 does not consider that it is interfered by the remote communication device, nor does it need other communication devices to perform interference management operations for it, i.e. the interference management operations performed by the aforementioned gNB #1 are redundant.

Since the interference management operation may reduce the DL resource utilization efficiency of the corresponding communication device, the operation of the gNB #1 to perform the interference backoff in response to the RS signal transmitted by the gNB #2/3/4 may cause a waste of network resources from the viewpoint of the overall network resource utilization efficiency.

Referring to fig. 6, an embodiment of the present invention provides a signal transmission method, where an execution subject of the method may be a communication device serving as an interfering station or a communication device serving as a victim station, and the communication device may be a 4G LTE base station, a 5G NR base station, or a communication device of another communication system, and the method includes the following specific steps:

step 601: determining a start transmission condition of the first reference signal and/or determining a stop transmission condition of the first reference signal according to at least one of historical transmission information of the reference signal, listening information of the reference signal, the first trigger condition and the second trigger condition.

In the embodiment of the present invention, the types of the reference signal include: a first type and a second type, wherein the reference signal of the first type is used for triggering other communication devices to perform interference management operations; the second type of reference signal is used to indicate whether the atmospheric waveguide phenomenon disappears. It is to be understood that the type of the first reference signal may be a first type, or the type of the first reference signal may also be a second type.

The historical transmission information of the reference signal may be that the communication device does not transmit the reference signal, or the historical transmission information may be that the communication device is transmitting the second reference signal, or the historical transmission information may be that the communication device does not transmit the first type of reference signal.

The interception information of the reference signal may be a reference signal sent by another communication device that the communication device intercepts, or the interception information may also be a reference signal that the communication device does not intercept any other communication device.

When the IoT detected by any communication device exceeds a threshold value, the communication device judges that the communication device is a victim station and sends a first type of reference signal for triggering other communication devices to execute interference management operation so as to reduce interference on own UL data.

And when any communication device detects the reference signal of the first type, the communication device further judges whether the communication device is a victim station. If not, a second type of reference signal is sent to assist in indicating whether the atmospheric waveguide phenomenon has disappeared.

When any communication device detects a first type of reference signal or a second type of reference signal, the communication device confirms that the atmospheric beam phenomenon still exists; the communication device confirms that the atmospheric beam phenomenon has disappeared only when the communication device fails to detect both the first type of reference signal and the second type of reference signal within a given time.

When the atmospheric wave guide phenomenon still exists, if a certain communication device detects a reference signal of the first type, the communication device needs to perform an interference management operation to reduce interference to UL data of other communication devices.

When any communication device confirms that the atmospheric wave guide phenomenon disappears, the remote interference management related operation is terminated, for example: stopping transmitting the first type of reference signal or the second type of reference signal, terminating performing an interference management operation, and the like;

in the embodiment of the present invention, a first trigger condition is used to determine whether the communication device is interfered by a remote end; the second trigger condition is used for judging whether the atmospheric waveguide phenomenon disappears.

Referring to fig. 7, a state transition diagram of a communication device according to an embodiment of the present invention is shown. First, the partial nouns in fig. 7 are explained:

a first state indicating that the communication device is in an initial state;

a second state, which indicates that the communication device is only a victim station and needs to send a reference signal of the first type for notifying other communication devices to perform interference backoff;

a third state, which indicates that the communication device is only an interference station, needs to perform interference management operation, and sends a second type of reference signal to assist other communication devices in judging whether the atmospheric waveguide phenomenon still exists;

the fourth state indicates that the communication device is both a victim station and an aggressor station, and therefore the communication device needs to transmit the reference signal of the first type for notifying other communication devices of interference backoff and perform interference management operation.

It will be appreciated that in the fourth state, the communication device need only transmit the reference signal of the first type, and need not transmit the reference signal of the first type and the reference signal of the second type simultaneously, since the reference signal of the first type may also assist the other communication devices in determining whether the atmospheric waveguiding phenomenon is still present.

The method flow in fig. 7 includes 2 cases: opt A and opt B.

In opt a, when a certain communication device determines that the communication device is only a scrambling station (the corresponding trigger condition is that a first type of reference signal is detected), the communication device sends a second type of reference signal;

in opt B, when a certain communication device determines that it is only a jamming station (the corresponding trigger condition is that a first type of reference signal is detected), the communication device sends a second type of reference signal; alternatively, when a communication device determines that it is in an initial state (the corresponding trigger condition is that neither the far-end interference feature nor the first type of reference signal is detected), but the communication device detects the second type of reference signal sent by other communication devices, the communication devices all also send the second type of reference signal.

Compared to opt a, opt B may prompt more communication devices to transmit the second type of reference signal when the atmospheric wave guide phenomenon occurs. The opt B scheme has the advantages that robustness of judgment of existence of the atmospheric waveguide phenomenon can be enhanced, and network resource overhead can be increased to transmit more RS signals.

It will be appreciated that in all of the above operating states, the communications device needs to listen to the RS.

In this embodiment of the present invention, optionally, the determining of the condition for starting to transmit the first reference signal in fig. 7 includes at least one of:

(1) If the first trigger condition is met, determining to start sending the first reference signal, wherein the type of the first reference signal is a first type;

(2) If the communication equipment does not send the reference signal and meets a first trigger condition, determining to start sending the first reference signal, wherein the type of the first reference signal is a first type;

the above-described start transmission condition corresponds to a transition process of the communication device from the first state to the second state in fig. 7.

(3) If the communication equipment is sending the second reference signal, the type of the second reference signal is the second type, and the first trigger condition is met, determining to terminate sending the second reference signal, and start sending the first reference signal, and the type of the first reference signal is the first type;

the above-described start transmission condition corresponds to a transition process of the communication apparatus from the third state to the fourth state in fig. 7, or a transition process of the communication apparatus from the sub-state B of the first state to the second state in fig. 7.

(4) If the communication equipment does not send the reference signal, the intercepted reference signals sent by other communication equipment are of a first type, and the intercepted reference signals sent by other communication equipment are of a second type;

the above-mentioned starting transmission condition corresponds to a transition process from the first state to the third state in opt a in fig. 7, i.e. only if the communication device senses the first type of reference signal transmitted by other communication devices, the communication device is triggered to transmit the second type of reference signal.

(5) If the communication equipment does not send the reference signal of the first type and listens the reference signals sent by other communication equipment, determining to start sending the first reference signal, wherein the type of the first reference signal is the second type;

the above-mentioned starting transmission condition corresponds to a transition process from the first state to the third state in opt a in fig. 7, or a transition process from the sub-state a of the first state to the sub-state B of the first state in opt B, or an internal state transition of the third state (i.e. from the third state back to the third state), or an internal state transition of the sub-state B of the first state in opt B, and includes: the communication device does not send the reference signal, or the communication device is sending the reference signal, but the sending reference signal is the second type reference signal, that is, as long as any type of reference signal sent by other base stations is sensed, the base station is triggered to send the second type of reference signal.

(6) If the communication equipment does not send the reference signal, the reference signal sent by other communication equipment is intercepted, and the type of the intercepted reference signal sent by other communication equipment is a second type, determining to start sending the first reference signal, wherein the type of the first reference signal is the second type;

the above-described start transmission condition corresponds to a transition procedure of the communication apparatus from the sub-state a of the first state to the sub-state B of the first state in fig. 7.

Wherein the first type of reference signal is used to trigger other communication devices to perform interference management operations; the second type of reference signal is used to indicate whether the atmospheric waveguide phenomenon disappears.

It should be understood that the two descriptions "start to transmit a reference signal" and "transmit a reference signal" are different in meaning, and "start to transmit a reference signal" means that the communication device will start to continuously transmit a reference signal until a termination condition is reached; "transmitting a reference signal" means that the communication device periodically transmits the reference signal in a partial time window according to a preset rule.

In the embodiment of the present invention, the satisfaction of the first trigger condition means that at least one of the following conditions is satisfied:

(1) The uplink interference strength index is higher than a first threshold value;

(2) During a time interval consisting of at least one UL OFDM symbol, the interference has a time domain power ramp characteristic;

(3) In a time interval consisting of at least one UL OFDM symbol, the difference of interference intensity indexes between adjacent OFDM symbols is larger than a second threshold value;

it is understood that the Uplink interference strength refers to the interference signal strength sensed in a Physical Uplink Shared Channel (PUSCH). The first threshold and the second threshold may be set according to specific situations, and are not specifically limited in the embodiment of the present invention.

In this embodiment of the present invention, optionally, if the communication device determines to start sending the first reference signal and the communication device is currently sending a second reference signal, the communication device determines to terminate sending the second reference signal and start sending the first reference signal;

optionally, if the communication device determines to start transmitting the first reference signal, and the communication device is currently transmitting a second reference signal, and the types of the first reference signal and the second reference signal are different, the communication device determines to terminate transmitting the second reference signal, and starts transmitting the first reference signal;

optionally, if the communication device determines to start sending the first reference signal, and the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are the same, the communication device continues sending the first reference signal.

In the embodiment of the present invention, optionally, if the communication device is transmitting the first reference signal and the second trigger condition is satisfied, the communication device stops transmitting the first reference signal.

In the embodiment of the present invention, optionally, if the communication device senses the reference signal sent by the other communication device, and the type of the sensed reference signal sent by the other device is the first type, performing an interference management operation;

in the embodiment of the present invention, optionally, if the communication device is performing the interference management operation and the second trigger condition is satisfied, the interference management operation is ended;

the interference management operation includes at least one of:

(1) Reducing downlink signal transmission power in at least one DL OFDM symbol;

(2) Increasing a time domain GP;

(3) Transmission of signals in a specific DL OFDM symbol is prohibited.

In the embodiment of the present invention, the satisfaction of the second trigger condition means that at least one of the following conditions is satisfied:

(1) In a first time window, the communication device does not listen to a reference signal transmitted by any other communication device;

(2) Within the second time window, the first trigger condition is not met and the communication device does not listen for a reference signal transmitted by any one of the other communication devices.

In the embodiment of the present invention, the first time window and the second time window may be the same or different.

It is understood that when the second trigger condition is satisfied, it means that the atmospheric waveguide phenomenon has disappeared.

Wherein the first time window and/or the second time window is larger than a time domain transmission period of the first type of reference signal and/or the second type of reference signal.

Referring to fig. 8, a flow of the communication device generating the RS time domain signal is shown, taking a time domain transmission period of the RS as 10.24s as an example, and the specific flow is as follows:

(1) Generating a base sequence

When the base sequence type is a pseudo-random sequence (c (n)), the generation parameters of the base sequence include: initial phase c _init ；

When the basic sequence type is a low Peak to Average Power Ratio sequence (low Peak to Average Power Ratio sequence, abbreviated as low-PARP sequence)

The generation parameters of the basic sequence include: cyclic shift (cyclic shift) α, variable δ, group number (group number) u, and intra-group sequence number (base sequence number with the group) v;

(2) Performing at least one operation on the basic sequence to generate an intermediate variable, and mapping the intermediate variable onto a physical resource (physical resource), wherein the intermediate operation comprises:

a. multiplying by a time domain scrambling code;

b. multiplying by a frequency domain scrambling code;

c. transform precoding (transform precoding);

d. fourier transform;

e. performing inverse Fourier transform;

f. multiplying by an amplitude scaling factor;

(3) Finally, generating an OFDM baseband signal;

in the embodiment of the present invention, optionally, the first type of reference signal and the second type of reference signal have a difference in characteristic parameters, and the characteristic parameters include at least one of: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

The first example: the base sequences of the first type of reference signal and the second type of reference signal are different. To generate different base sequences, different sets of base sequence generation parameters may be configured for the first type of reference signal and the second type of reference signal. For example, different initial phase sets are configured for the first type of reference signal and the second type of reference signal.

The second example is: the base sequences of the first type of reference signal and the second type of reference signal are the same, but the frequency domain scrambling code sequences are different. For example, different sets of frequency-domain scrambling code sequences are configured for the first type of reference signal and the second type of reference signal.

The third example: the first type of reference signal and the second type of reference signal have different base sequences and different frequency domain scrambling code sequences.

A fourth example: on the basis of the above three examples, the time domain transmission periods of the first type of reference signal and the second type of reference signal are different.

Preferably, the time domain transmission period of the second type of reference signal is larger than the time domain transmission period of the first type of reference signal.

It is to be understood that other combinations of parameters are not excluded in the embodiments of the present invention.

In this embodiment of the present invention, optionally, the communication device determines the first characteristic parameter set and/or the second characteristic parameter set by at least one of pre-agreement, OAM configuration, and backhaul signaling indication between communication devices.

The first characteristic parameter set and/or the second characteristic parameter set comprise characteristic parameters, wherein the characteristic parameters comprise at least one of the following parameters: at least one of time domain transmission resources, frequency domain transmission resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain transmission period.

In the embodiment of the present invention, optionally, when the characteristic parameter of the reference signal transmitted by the other communication device sensed by the communication device belongs to the first characteristic parameter set, determining that the type of the sensed reference signal transmitted by the other communication device is the first type; and/or determining the type of the reference signal transmitted by the other communication equipment to be the second type when the characteristic parameter of the reference signal transmitted by the other communication equipment to be sensed belongs to the characteristic parameter set of the reference signal of the second type.

In this way, the communication device can determine the type of the reference signal by determining the feature set to which the feature parameter belongs according to the feature parameter of the reference signal.

In the embodiment of the present invention, optionally, when the communication device determines that the first reference signal type is the first type, determining a first feature parameter, where the first feature parameter belongs to a first feature parameter set; alternatively, when the communication device determines that the first reference signal type is a second type, a second characteristic parameter is determined, and the first characteristic parameter belongs to a second characteristic parameter set.

In this way, the communication device can determine a feature set corresponding to the type of the reference signal according to the type of the reference signal.

In the embodiment of the invention, the types of the first reference signals comprise a first type and a second type, wherein the first type of the first reference signals is used for triggering other communication devices to execute interference management operation, and the second type of the first reference signals is used for indicating whether the atmospheric waveguide phenomenon disappears. By having the first reference signals of the first type and the second type, the communication device can be prevented from performing unnecessary interference management operations, and thus network resource utilization efficiency can be improved.

Referring to fig. 9, an embodiment of the present invention provides a communication device, including: a transceiver 901 and a processor 902;

the processor 902 is configured to determine a starting transmission condition of the first reference signal and/or determine a stopping transmission condition of the first reference signal according to at least one of historical transmission information of the reference signal, interception information of the reference signal, the first trigger condition, and the second trigger condition;

the first trigger condition is used for judging whether the communication equipment is interfered by a far end; the second trigger condition is used for judging whether the atmospheric waveguide phenomenon disappears or not;

the first reference signal includes: a first type of reference signal and a second type of reference signal, the first type of reference signal for triggering other communication devices to perform interference management operations; the second type of reference signal is used to indicate whether the atmospheric wave guide phenomenon disappears.

Optionally, the condition for starting to transmit the first reference signal includes at least one of: if the communication equipment does not send the reference signal of the first type and detects the reference signal sent by other communication equipment, starting to send the first reference signal, wherein the type of the first reference signal is the second type; if the communication equipment does not send the reference signal, and senses the reference signal sent by other communication equipment, and the type of the sensed reference signal sent by other communication equipment is a first type, starting to send the first reference signal, wherein the type of the first reference signal is a second type; if the communication equipment does not send the reference signal, and listens the reference signal sent by other communication equipment, and the type of the heard reference signal sent by other communication equipment is a second type, the first reference signal is started to be sent, and the type of the first reference signal is the second type.

Optionally, the processor 902 is further configured to determine to terminate sending the second reference signal and start sending the first reference signal if the communication device determines to start sending the first reference signal and the communication device is currently sending a second reference signal; if the communication device determines to start sending the first reference signal, the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are different, the communication device determines to terminate sending the second reference signal and starts sending the first reference signal; if the communication device determines to start sending the first reference signal, and the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are the same, the communication device continues to send the first reference signal.

Optionally, the processor 902 is further configured to start to perform the interference management operation if the communication device listens to a reference signal sent by another communication device, and the type of the heard reference signal sent by the another device is a first type; or, if the communication device is performing the interference management operation and the second trigger condition is satisfied, ending the interference management operation.

Optionally, the interference management operation comprises at least one of: reducing downlink signal transmission power in at least one DL OFDM symbol; increasing a time domain GP; transmission of signals in a specific DL OFDM symbol is prohibited.

Optionally, the processor 902 is further configured to determine the first characteristic parameter set and/or the second characteristic parameter set by at least one of pre-agreement, OAM configuration, and backhaul signaling indication between communication devices; wherein the first characteristic parameter set and/or the second characteristic parameter set comprise characteristic parameters, wherein the characteristic parameters comprise at least one of the following: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

Optionally, the processor 902 is further configured to determine, when the characteristic parameter of the intercepted reference signal sent by the other communication belongs to the first characteristic parameter set, that the type of the intercepted reference signal sent by the other communication is a first type; and/or determining the type of the reference signal sent by the other communication to be heard as the second type when the characteristic parameter of the reference signal sent by the other communication to be heard belongs to the characteristic parameter set of the reference signal of the second type.

Optionally, the processor 902 is further configured to determine a first feature parameter when the communication device determines to send the first reference signal and the first reference signal type is a first type, where the first feature parameter belongs to a first feature parameter set; or, when the communication device determines to transmit the first reference signal and the first reference signal type is a second type, determining a second characteristic parameter, where the second characteristic parameter belongs to a second characteristic parameter set.

In the embodiment of the invention, two types of reference signals are set, wherein the first type of reference signal is used for triggering other communication equipment to execute interference management operation; while the second type of reference signal is only used to indicate whether the atmospheric wave guide phenomenon disappears. With the two types of reference signals, the communication device can be prevented from performing unnecessary interference management operations, and thus network resource utilization efficiency can be improved.

Referring to fig. 10, another communication device 1000 according to an embodiment of the present invention includes: a processor 1001, a transceiver 1002, a memory 1003, and a bus interface.

Among other things, the processor 1001 may be responsible for managing the bus architecture and general processing. The memory 1003 may store data used by the processor 1001 in performing operations.

In this embodiment of the present invention, the communication device 1000 may further include: a computer program stored on the memory 1003 and executable on the processor 1001, which when executed by the processor 1001, performs the steps of the method provided by an embodiment of the present invention.

In fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1001 and various circuits of memory represented by memory 1003 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. The bus interface provides an interface. The transceiver 1002 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing method for network access, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A signal transmission method applied to a communication device is characterized by comprising the following steps:

determining to start to transmit the first reference signal and/or determining to stop transmitting the first reference signal according to at least one of historical transmission information of the reference signal, interception information of the reference signal, the first condition and the second condition;

wherein the type of the first reference signal is a first type and/or a second type;

wherein the determining to start transmitting the first reference signal comprises at least one of:

if the first condition is met, starting to send the first reference signal, wherein the type of the first reference signal is a first type;

if the communication equipment does not send the reference signal and the first condition is met, starting to send the first reference signal, wherein the type of the first reference signal is a first type;

if the communication equipment is sending a second reference signal, the type of the second reference signal is a second type, and the first condition is met, terminating sending the second reference signal, and starting sending the first reference signal, and the type of the first reference signal is a first type;

if the communication equipment does not send the reference signal of the first type and detects the reference signal sent by other communication equipment, starting to send the first reference signal, wherein the type of the first reference signal is the second type;

if the communication equipment does not send the reference signal, and listens the reference signal sent by other communication equipment, and the type of the heard reference signal sent by other communication equipment is a first type, starting to send the first reference signal, wherein the type of the first reference signal is a second type;

if the communication equipment does not send the reference signal, and listens the reference signal sent by other communication equipment, and the type of the heard reference signal sent by other communication equipment is a second type, starting to send the first reference signal, wherein the type of the first reference signal is the second type;

wherein the determining to stop transmitting the first reference signal comprises:

if the communication device is transmitting the first reference signal and a second condition is met, the communication device stops transmitting the first reference signal;

wherein, satisfying the first condition means satisfying at least one of the following conditions:

the uplink interference strength index is higher than a first threshold value;

interference has a time domain power ramp characteristic in a time interval consisting of at least one uplink UL orthogonal frequency division multiplexing, OFDM, symbol;

in a time interval consisting of at least one UL OFDM symbol, the difference of interference intensity indexes between adjacent OFDM symbols is larger than a second threshold value;

wherein, satisfying the second condition means satisfying at least one of the following conditions:

within a first time window, the communication device does not listen for a reference signal transmitted by any other communication device;

within a second time window, the first condition is not satisfied and the communication device does not listen for a reference signal transmitted by any one of the other communication devices.

2. The method of claim 1, further comprising at least one of:

if the communication device determines to start sending the first reference signal and the communication device is currently sending a second reference signal, the communication device determines to terminate sending the second reference signal and starts sending the first reference signal;

if the communication device determines to start transmitting the first reference signal, and the communication device is currently transmitting a second reference signal, and the types of the first reference signal and the second reference signal are different, the communication device determines to terminate transmitting the second reference signal and starts transmitting the first reference signal;

if the communication device determines to start sending the first reference signal, and the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are the same, the communication device continues to send the first reference signal.

3. The method of claim 1, further comprising:

if the communication equipment monitors the reference signals sent by other communication equipment and the type of the monitored reference signals sent by other equipment is a first type, starting to execute interference management operation;

alternatively, the first and second electrodes may be,

ending the interference management operation if the communication device is performing the interference management operation and the second condition is satisfied.

4. The method of claim 3, wherein the interference management operation comprises at least one of:

reducing downlink signal transmission power in at least one downlink orthogonal frequency division multiplexing (DL OFDM) symbol;

increasing a time domain guard time interval GP;

transmission of signals in a particular DL OFDM symbol is prohibited.

5. The method of claim 1,

the first type of reference signal and the second type of reference signal differ in characteristic parameters, the characteristic parameters including at least one of: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

6. The method of claim 1, further comprising:

determining a first characteristic parameter set and/or a second characteristic parameter set through at least one of prearranged OAM configuration, operation, administration and maintenance (OAM) configuration and backhaul signaling indication between communication devices;

wherein the first characteristic parameter set and/or the second characteristic parameter set comprise characteristic parameters, and the characteristic parameters comprise at least one of the following parameters: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

7. The method of claim 6, further comprising:

when the characteristic parameters of the intercepted reference signals sent by other communication belong to a first characteristic parameter set, determining the type of the intercepted reference signals sent by the other communication to be a first type; and/or the presence of a gas in the atmosphere,

and when the characteristic parameters of the reference signals sent by the other intercepted communication belong to the characteristic parameter set of the reference signals of the second type, determining the type of the reference signals sent by the other intercepted communication to be the second type.

8. The method of claim 6, further comprising:

when the communication equipment determines to send the first reference signal and the type of the first reference signal is a first type, determining a first characteristic parameter, wherein the first characteristic parameter belongs to a first characteristic parameter set; alternatively, the first and second liquid crystal display panels may be,

when the communication device determines to send the first reference signal and the first reference signal type is a second type, determining a second characteristic parameter, wherein the second characteristic parameter belongs to a second characteristic parameter set.

9. A communication device, comprising: a transceiver and a processor, wherein,

the processor is used for determining to start to transmit the first reference signal and/or determining to stop transmitting the first reference signal according to at least one of historical transmission information of the reference signal, interception information of the reference signal, a first condition and a second condition;

the uplink interference strength index is higher than a first threshold value;

within a first time window, the communication device does not listen to a reference signal transmitted by any other communication device;

10. The communication device of claim 9,

the processor is further configured to determine, if the communication device determines to start transmitting the first reference signal and the communication device is currently transmitting a second reference signal, to terminate transmitting the second reference signal and start transmitting the first reference signal; if the communication device determines to start transmitting the first reference signal, and the communication device is currently transmitting a second reference signal, and the types of the first reference signal and the second reference signal are different, the communication device determines to terminate transmitting the second reference signal and starts transmitting the first reference signal; if the communication device determines to start sending the first reference signal, and the communication device is currently sending a second reference signal, and the types of the first reference signal and the second reference signal are the same, the communication device continues to send the first reference signal.

11. The communication device of claim 9,

the processor is further configured to start to perform an interference management operation if the communication device senses a reference signal transmitted by another communication device and the sensed type of the reference signal transmitted by the another device is a first type; or, if the communication device is performing the interference management operation and the second condition is satisfied, ending the interference management operation.

12. The communications device of claim 11, wherein the interference management operation comprises at least one of:

reducing downlink signal transmission power in at least one DL OFDM symbol;

increasing a time domain GP;

transmission of signals in a particular DL OFDM symbol is prohibited.

13. The communications device of any of claim 9, wherein the first type of reference signal and the second type of reference signal differ in characteristic parameters, the characteristic parameters comprising at least one of: time domain sending resources, frequency domain sending resources, a basic sequence, generation parameters of the basic sequence, a time domain scrambling sequence, a frequency domain scrambling sequence and a time domain sending period.

14. The communication device of claim 9,

the processor is further configured to determine a first characteristic parameter set and/or a second characteristic parameter set through at least one of a pre-agreement, OAM configuration, and backhaul signaling indication between communication devices;

15. The communication device of claim 14,

the processor is further configured to determine that the type of the sensed reference signal sent by other communication is a first type when the characteristic parameter of the sensed reference signal sent by other communication belongs to a first characteristic parameter set; and/or determining the type of the reference signal sent by the other communication to be heard as the second type when the characteristic parameter of the reference signal sent by the other communication to be heard belongs to the characteristic parameter set of the reference signal of the second type.

16. The communication device of claim 14,

the processor is further configured to determine a first feature parameter when the communication device determines to transmit the first reference signal and the first reference signal type is a first type, where the first feature parameter belongs to a first feature parameter set; or, when the communication device determines to transmit the first reference signal and the first reference signal type is a second type, determining a second characteristic parameter, where the second characteristic parameter belongs to a second characteristic parameter set.

17. A communication device, comprising: processor, memory and program of a signal transmission method stored on the memory and executable on the processor, which program, when executed by the processor, implements the steps of the signal transmission method according to any one of claims 1 to 8.

18. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a program of a signal transmission method, which when executed by a processor implements the steps of the signal transmission method according to any one of claims 1 to 8.