CN113067686A

CN113067686A - Sending method and device of RIM-RS

Info

Publication number: CN113067686A
Application number: CN202010001418.XA
Authority: CN
Inventors: 柯颋; 吴丹; 刘建军; 王启星; 刘光毅; 张静文
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: 2020-01-02
Filing date: 2020-01-02
Publication date: 2021-07-02
Anticipated expiration: 2040-01-02
Also published as: CN113067686B

Abstract

The invention provides a sending method and a sending device of a RIM-RS (radio identity module-RS), belonging to the technical field of wireless communication. The sending method of the RIM-RS is applied to first communication equipment and comprises the following steps: at least two sets of RIM-RSs are configured for the ground network, configuration information of each RIM-RS comprises one or two uplink and downlink conversion periods, and the configuration of the uplink and downlink conversion periods of the at least two sets of RIM-RSs is different. The technical scheme of the invention can solve the problem of remote interference management under a non-quasi-homogeneous network.

Description

Sending method and device of RIM-RS

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting RIM-RS.

Background

When the atmospheric waveguide phenomenon occurs, a base station of a ground network and an air-to-ground (ATG) base station may generate far-end interference with each other. When the atmospheric waveguide phenomenon occurs, the ATG base station needs to execute interference avoidance operation so as to avoid interference on the ground network performance; and the ground network does not need to avoid the interference of the ground network to the ATG network. The related art has a problem that an ATG base station cannot detect a Remote Interference Management Reference Signal (RIM-RS) transmitted by a part of ground network base stations due to different time-division duplex (TDD) uplink and downlink switching periods used for an air-to-ground (ATG) network and the ground network.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a sending method and a sending device of RIM-RS, which can solve the problem of remote interference management under a non-quasi-homogeneous network.

To solve the above technical problem, embodiments of the present invention provide the following technical solutions:

the embodiment of the invention provides a sending method of a RIM-RS, which is applied to first communication equipment and comprises the following steps:

at least two sets of RIM-RSs are configured for the ground network, configuration information of each RIM-RS comprises one or two uplink and downlink conversion periods, and the configuration of the uplink and downlink conversion periods of the at least two sets of RIM-RSs is different.

Optionally, the configurations of the uplink and downlink conversion periods of the at least two sets of RIM-RS are different, and any one of the following conditions is satisfied,

the at least two sets of RIM-RSs only comprise one uplink and downlink switching period, and T1 is not equal to T2, wherein T1 is the uplink and downlink switching period of a first set of RIM-RS in the at least two sets of RIM-RSs, and T2 is the uplink and downlink switching period of a second set of RIM-RS in the at least two sets of RIM-RSs;

the at least two sets of RIM-RSs comprise two uplink and downlink switching periods, and T1A is not equal to T2A, or T1B is not equal to T2B, wherein T1A and T1B are the uplink and downlink switching periods of a first set of RIM-RS in the at least two sets of RIM-RSs, and T2A and T2B are the uplink and downlink switching periods of a second set of RIM-RS in the at least two sets of RIM-RSs;

at least one set of RIM-RS in the at least two sets of RIM-RSs only comprises one uplink and downlink conversion period, and other RIM-RSs in the at least two sets of RIM-RSs comprise two uplink and downlink conversion periods.

Alternatively,

if the at least two sets of RIM-RSs only contain one uplink and downlink switching period, T1 is greater than T2, and T1 is an integral multiple of T2, wherein T1 is the uplink and downlink switching period of a first set of RIM-RS in the at least two sets of RIM-RSs, and T2 is the uplink and downlink switching period of a second set of RIM-RS in the at least two sets of RIM-RSs;

or, if at least one set of RIM-RS in the at least two sets of RIM-RS only contains one uplink/downlink switching period T1, and the other RIM-RS in the at least two sets of RIM-RS contains two uplink/downlink switching periods T2A and T2B, then T1> (T2A + T2B), and T1 is an integer multiple of (T2A + T2B).

Optionally, the configuration information of each RIM-RS further includes a scrambling code identification ID set, where the scrambling code ID set includes at least 1 scrambling code ID, and elements in scrambling code ID sets of different RIM-RS are different.

Optionally, the at least two sets of RIM-RS have different starting time domain offsets within the RIM-RS transmission period.

Optionally, the at least two sets of RIM-RS comprise a first RIM-RS type 1 and a third RIM-RS type 3, the method comprising at least one of:

when the first communication device detects that the interference noise IoT rise exceeds a preset threshold, at least continuously transmitting RIM-RS type 1 and RIM-RS type 3;

stopping transmitting any type of RIM-RS when the first communication device does not detect any type of RIM-RS;

the first communication device does not listen to RIM-RS type 3.

Optionally, the first communication device is a base station of a terrestrial network.

The embodiment of the invention also provides a sending method of the RIM-RS, which is applied to the first communication equipment and comprises the following steps:

and configuring a set of RIM-RS for the ground network, wherein the time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period changes along with time.

Optionally, the transmission resource of the RIM-RS is variable

Determining, wherein,

and resource indication in the time domain parameter list, the frequency domain parameter list and the sequence parameter list which respectively correspond to the OAM configuration.

Optionally, the time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period varies with time, and the time domain resource indicates

Determined by at least one of:

the method comprises the steps of starting time domain offset, the number of candidate sequences of the current RIM-RS type, the number of continuous uplink and downlink conversion cycles of the current RIM-RS type, a device identification set ID of first communication equipment and a time parameter.

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

r represents the number of continuous uplink and downlink conversion periods of the current RIM-RS type, n_setIDA set ID representing the first communication device;

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function.

And/or the presence of a gas in the gas,

its frequency domain resource indication

Determined by the following equation:

and/or, sequence indication

Determined by the following equation:

wherein,

optionally, the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

when the value range of x is [ a, b ], the value range of f (x, t) is also [ a, b ]; wherein a and b are non-zero integers.

The embodiment of the invention also provides a sending method of the RIM-RS, which is applied to second communication equipment and comprises the following steps:

configuring a set of RIM-RS for a ground-to-air network, wherein configuration information of the RIM-RS comprises 1 uplink and downlink conversion period or 2 uplink and downlink conversion periods;

periodically listening for a RIM-RS transmitted by the first communication device, said second communication device not transmitting any RIM-RS.

Optionally, the method further comprises at least one of:

when the RIM-RS sent by the first communication equipment is detected, an interference suppression mechanism is started;

stopping an interference suppression mechanism when the RIM-RS transmitted by the first communication device is not detected.

Optionally, the periodically listening for the RIM-RS transmitted by the first communication device includes any one of:

monitoring two sets of RIM-RSs sent by first communication equipment, wherein the uplink and downlink switching period of one set of RIM-RSs is the same as the uplink and downlink switching period of the RIM-RSs configured by second communication equipment;

monitoring a set of RIM-RS sent by first communication equipment, wherein the first communication equipment at least sends two sets of RIM-RS, and the uplink and downlink conversion periods of the at least two sets of RIM-RS are different;

and monitoring a set of RIM-RS sent by the first communication equipment, wherein the time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period changes along with time.

Optionally, the second communication device is a ground-to-air network base station.

An embodiment of the present invention further provides a sending apparatus for RIM-RS, which is applied to a first communication device, and includes:

the configuration module is used for configuring at least two sets of RIM-RSs for the ground network, the configuration information of each RIM-RS comprises one or two uplink and downlink conversion periods, and the uplink and downlink conversion periods of the at least two sets of RIM-RSs are configured differently.

Alternatively,

Optionally, the at least two sets of RIM-RS comprise a first RIM-RS type 1 and a third RIM-RS type 3, and the apparatus further comprises:

a processing module to perform at least one of:

the first communication device does not listen to RIM-RS type 3.

the configuration module is used for configuring a set of RIM-RS for the ground network, and the time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period changes along with time.

Optionally, the transmission resource of the RIM-RS is variable

Determining, wherein,

Determined by at least one of:

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function.

And/or, frequency domain resource indication

Determined by the following equation:

and/or, sequence indication

Determined by the following equation:

wherein,

optionally, the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

The embodiment of the invention also provides a sending device of the RIM-RS, which is applied to the first communication equipment and comprises a processor and a transceiver,

the processor is used for configuring at least two sets of RIM-RSs for the ground network, configuration information of each RIM-RS comprises one or two uplink and downlink conversion periods, and the uplink and downlink conversion periods of the at least two sets of RIM-RSs are configured differently.

Alternatively,

Optionally, the at least two sets of RIM-RSs comprise a first RIM-RS type 1 and a third RIM-RS type 3, and the transceiver is further configured to perform at least one of:

the first communication device does not listen to RIM-RS type 3.

and the processor is used for configuring a set of RIM-RS for the ground network, and the time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period changes along with time.

Optionally, the transmission resource of the RIM-RS is variable

Determining, wherein,

Determined by at least one of:

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

r represents continuous uplink and downlink conversion of current RIM-RS typeNumber of cycles, n_setIDA set ID representing the first communication device;

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function; and/or, frequency domain resource indication

Determined by the following equation:

and/or, sequence indication

Determined by the following equation:

wherein,

optionally, the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

The variable is

Determined by at least one of:

starting time domain offset, number of candidate sequences of current RIM-RS type, number of continuous uplink and downlink conversion periods of current RIM-RS type, and equipment mark of first communication equipmentIdentifying a set ID; the variable is

Determined by at least one of:

the number of candidate frequency domain resources configured by the network, the number of candidate sequences of the current RIM-RS type and the set ID of the first communication equipment;

the variable is

Determined by at least one of:

a starting time domain offset, a number of candidate sequences of a current RIM-RS type, a set ID of the first communication device.

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

r represents the number of continuous uplink and downlink conversion periods of the current RIM-RS type, n_setIDA set ID representing the first communication device; f (-) is an arbitrary function.

Starting time domain offset T_startDetermined by the following equation:

the RIM-RS includes a first RIM-RS type 1 and a second RIM-RS type 2,

representing the total Set ID number, R, of RIM-RS type 1₁Indicating that each base station transmits RIM-RS RIM-RS comprising a first RIM-RS type 1 and a second RIM-RS type 2, the number of uplink and downlink conversion periods continuously occupied by the type 1,

representing the number of candidate frequency domain resources for the network configuration,

indicates the number of candidate sequences usable by RIM-RS type 1,

representing the total Set ID number, R, of RIM-RS type 2₂Represents the number of uplink and downlink conversion periods continuously occupied by each base station for transmitting RIM-RS type 2,

indicates the number of candidate sequences usable by RIM-RS type 2. Optionally, the first communication device is a base station of a terrestrial network.

The embodiment of the invention also provides a sending device of the RIM-RS, which is applied to the second communication equipment and comprises the following steps:

the system comprises a configuration module, a control module and a sending module, wherein the configuration module is used for configuring a set of RIM-RS for a ground-to-air network, and the configuration information of the RIM-RS comprises 1 uplink and downlink conversion period or 2 uplink and downlink conversion periods;

and the interception module is used for periodically intercepting the RIM-RS sent by the first communication equipment and not sending any RIM-RS.

Optionally, the listening module is further configured to perform at least one of:

Optionally, the listening module is configured to perform any one of:

The embodiment of the invention also provides a sending device of the RIM-RS, which is applied to the second communication equipment and comprises a processor and a transceiver,

the processor is used for configuring a set of RIM-RS for the ground-to-air network, and the configuration information of the RIM-RS comprises 1 uplink and downlink conversion period or 2 uplink and downlink conversion periods;

the transceiver is configured to periodically listen for the RIM-RS transmitted by the first communication device without transmitting any RIM-RS.

Optionally, the transceiver is further configured to perform at least one of:

Optionally, the transceiver is configured to perform any of:

An embodiment of the present invention provides a communication apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the method of transmitting a RIM-RS as described above.

An embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in the transmission method of a RIM-RS as described above.

The embodiment of the invention has the following beneficial effects:

in the scheme, the first communication equipment is configured with at least one set of RIM-RS, the at least one set of RIM-RS comprises different uplink and downlink conversion periods or transmission resources of the RIM-RS change along with time, and when the at least one set of RIM-RS comprises different uplink and downlink conversion periods, the ATG-RIM-RS can be ensured to be listened by the ATG base station by reasonably configuring time domain transmission resources; when the transmission resource of the RIM-RS changes along with time, the RIM-RS transmitted in any ground network base station period can be ensured to be listened by the ATG base station in at least part of time intervals, so that the problem of remote interference management under a non-quasi-homogeneous network is solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be 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 according to these drawings without inventive labor.

Fig. 1 is a block diagram of a remote interference management process;

FIG. 2 is a schematic diagram of a RIM-RS time domain transmission location;

FIG. 3 is a schematic diagram of an ATG network;

FIG. 4 is a diagram illustrating that the RIM-RS transmitted by the ground network cannot be detected by the ATG base station;

fig. 5A and 5B are schematic flow charts of a sending method of RIM-RS at a first communication device side according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of RIM-RS type 3 according to an embodiment of the present invention;

FIG. 7 is a schematic time domain position diagram of RIM-RS type 1 and RIM-RS type 2 according to an embodiment of the present invention;

FIG. 8 is a schematic time domain position diagram of RIM-RS type 1, RIM-RS type 2 and RIM-RS type 3 according to an embodiment of the present invention;

fig. 9 is a flowchart illustrating a method for sending a RIM-RS at a second communications device according to an embodiment of the present invention;

fig. 10 is a block diagram of a device for transmitting a remote interference management reference signal on a first communication device side according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a configuration of a device for sending a remote interference management reference signal on a first communication device side according to an embodiment of the present invention;

fig. 12 is a block diagram of a device for sending a remote interference management reference signal on a second communication device side according to an embodiment of the present invention;

fig. 13 is a schematic composition diagram of a device for sending a remote interference management reference signal on the second communication device side according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as 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), 5G New air interface (New Radio, NR), and other systems. 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 (Wideband Code Division Multiple Access, 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 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 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. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

In inland areas where spring, summer and fall meet, or coastal areas in winter, the phenomenon of Atmospheric waveguide (Atmospheric Duct) is likely to occur. The troposphere has a layer where the inverse temperature or the water vapor becomes sharply smaller with the height, called waveguide layer, and most of the radio wave radiation is confined in the layer and is transmitted with low path loss in ultra-long distance (such as tens to hundreds of kilometers). For a time-division duplex (TDD) system, after a downlink signal of a remote base station is propagated over a very long distance, strong interference may be caused to uplink data reception of a local base station.

The interference of the remote base station has the characteristics of wide interference range, high frequency, serious degree and the like. The domestic operators find that half provinces in the country are disturbed and more than half days in the whole year are disturbed seriously in the Time Division Long Term evolution (TD-LTE) existing network operation. When the interference occurs, the uplink background noise is greatly increased, and the network uplink performance is deteriorated.

In order to solve the above problems, the related art introduces a New Radio (NR) Remote Interference Management (NR-RIM) technology, and proposes a whole set of technical solutions.

The remote interference management mechanism mainly relates to interference identification, interference suppression and three contents of a workflow framework.

The interference identification refers to how to let the interfered base station identify and determine that Uplink (UL) interference is actually generated by interference of a distant base station. Specifically, a novel reference signal RIM-RS is designed, and the interfered base station transmit RIM-RSs carrying different functions, so that the other side can determine that UL interference is actually generated by interference of a remote base station and determine when the atmospheric waveguide phenomenon disappears. The related art has standardized the sequence generation mode of the RIM-RS and the mapping relation between the time-frequency code resources and the base station group identifier (Set ID).

Interference suppression refers to how to operate to reduce interference to a remote base station after an interfering base station recognizes itself as an interference source. Specifically, the interference suppression mechanism may be performed in four aspects, namely, a time domain, a frequency domain, a spatial domain and a power domain.

The workflow framework refers to a perfect working mechanism for concatenating interference identification and interference suppression, such as determining when a victim base station starts and ends transmitting RIM-RS, and when an aggressor base station starts and ends interference suppression mechanism, etc.

Fig. 1 is a schematic diagram of a flow framework for implementing remote interference management over a pure air interface. In the flow framework, two types of reference signals are designed, referred to as RS-1 and RS-2, respectively. The RS-1 is sent by the disturbed base station; when other base stations detect the RS-1, the base station determines that the base station itself serves as an interference base station to generate far-end interference to other base stations. By setting the uniform RS-1 time domain sending position of the whole network, the interference base station can deduce the number of downlink symbols generating remote interference. In contrast, RS-2 is transmitted by the interfering base station and has the function of assisting the interfered base station to determine whether the atmospheric waveguide phenomenon still exists, so as to avoid the ping-pong effect. Specifically, when the interfering base station detects RS-1, it will automatically turn on the remote interference suppression mechanism and continue to transmit RS-2.

The various steps and events in FIG. 1 are explained as follows:

step 0: operation Administration and Maintenance (OAM) configures all base stations to periodically listen to RS-1. If the base station detects RS-1 (event B), the base station judges that the base station is an interference base station and enters step 3;

step 1: when the atmospheric waveguide phenomenon occurs, the downlink transmission of the disturbing base station generates far-end interference to the uplink reception of the disturbed base station;

step 2: when the victim base station detects that IoT rise exceeds a threshold (event A), starting to continuously send RS-1 (step 2-1) and continuously monitor RS-1 and RS-2 (step 2-2) until event C occurs;

and step 3: the interfering base station starts a far-end interference suppression scheme on a downlink symbol generating far-end interference to the interfered base station (step 3-1), starts to continuously send RS-2 (step 3-2), and continuously monitors RS-1 and RS-2 (step 3-3) until an event C occurs.

Event C: when the interfered base station and/or the interfered base station can not detect any RS (including RS-1 and RS-2), the atmospheric waveguide phenomenon is considered to disappear. At the moment, the interference base station stops an interference suppression mechanism, recovers a normal downlink sending behavior and stops the sending of the RS-2; the interfered base station stops the transmission of the RS-1; and the interfered base station and the interfering base station stop monitoring the RS-2.

It should be noted that the above solution develops NR-RIM technical research based on the basic assumption of quasi-homogeneous network characteristics, where all NR base stations use the same uplink and downlink switching period and have the same downlink transmission boundary.

As shown in fig. 2, under the basic assumption of a quasi-homogeneous network, a disturbing base station can know a priori a time domain symbol position of a RIM-RS sent by a disturbed base station through network configuration; when the RIM-RS is detected, the propagation distance to the interfered base station can be determined, so as to identify which uplink symbols of the interfered base station may cause interference, and determine a corresponding interference back-off mechanism and parameters, such as the number of back-off downlink symbols.

In another flow framework for realizing remote interference management, which needs to rely on a network backhaul interface, only RS-1 is adopted.

With the development of the aviation industry and internet technology, the demand of ground-air interconnection application is more and more urgent. Through ground-air interconnection, passengers can access the Internet on the plane like on the ground to enjoy various Internet application services, and operators, airlines and industry parties can also provide value-added services based on the ground-air interconnection technology.

An air-to-Air (ATG) communication technology utilizes a mature land mobile communication technology, such as 4G and 5G technologies, and establishes a special base station on the ground, of which an antenna can cover the sky, so as to construct a special network for ground-to-air stereo coverage, thereby effectively solving high-altitude stereo coverage and realizing ground-to-air high-speed data transmission. The ground base station scheme is developed along with the mobile communication technology, provides a solution with high bandwidth, high flow and low cost, and has great advantages of network deployment and upgrading maintenance.

The ATG service can provide on-board entertainment, on-board office, customized service and the like for aviation passengers, has wide industrial application prospect, and can be generalized to two applications of video image return and sampling data return. The video image return is widely applied to the fields of flight safety guarantee, offshore rescue, disaster rescue, industrial inspection, public security cruise and the like. The sampling data return can be widely applied to meteorological data collection, atmospheric environment data collection and other scenes, and high-quality high-end services are provided for various industries. Fig. 3 is a schematic diagram of an ATG network.

Compared with the terrestrial network, the ATG system faces some special challenges, and also puts special requirements on the system design:

technical challenge 1: supporting an ultra-large single station coverage radius. The ATG system needs to support an ultra-large single station coverage radius, such as 100-300 km. For example, in inland regions, it is typically necessary to support a 100km single station coverage radius to reduce the number of ATG base stations and reduce the network deployment cost. In addition, in order to allow a land (such as a large link) base station to cover an airplane above a gulf (such as a Bohai gulf), the ATG network is required to support a single station coverage radius of 300km at the farthest.

Technical challenge 2: supporting ultra-high moving speeds. The ATG system needs to support the aircraft flight speed of 1200km/h at maximum, which poses high challenges to doppler frequency shift estimation and compensation.

Technical challenge 3: the ATG network and the ground network are deployed at the same frequency, and may generate serious intersystem interference. In order to save spectrum resources, it is considered to use the same operating frequency, such as the NR band of 4.9GHz, for the ATG system and the terrestrial cellular communication system. A relatively serious intersystem interference may occur between the ATG system and the terrestrial NR system.

In particular, for technical challenge 1, in order to support a single station coverage radius of 300km at maximum, a TDD system needs to support TDD uplink and downlink transition Guard time slots (GP) of 2ms at maximum. Note that in the frame structure of a given TDD up-down switching period, the longer the GP, the greater the spectral efficiency loss. For example, when the TDD uplink and downlink switching period is 5ms, a 2ms GP will result in a 40% loss of spectral efficiency; when the TDD uplink/downlink switching period is 10ms, 2ms GP will cause 20% of spectrum efficiency loss; whereas when the TDD up-down switching period is 20ms, a 2ms GP will result in a 10% loss in spectral efficiency. In order to limit GP overhead, the ATG system prefers a TDD uplink and downlink switching period of 10ms or 20 ms.

On the other hand, in the terrestrial network, due to the limited coverage radius (e.g., 500m), the GP overhead is substantially negligible. In order to reduce the Round-Trip Time (RTT) of the TDD system, the NR terrestrial network usually selects a shorter TDD uplink and downlink switching period, such as 2.5 ms.

To sum up, the ATG network and the NR ground network will select different TDD uplink/downlink switching periods, wherein the ATG network prefers a longer TDD uplink/downlink switching period, such as 10ms or 20 ms; while the NR terrestrial network prefers shorter TDD up-down switching periods, such as 2.5 ms.

As described above, the related art develops NR-RIM technical research based on the basic assumption of the characteristics of a quasi-homogeneous network, which means that all NR base stations use the same uplink and downlink switching period and have the same downlink transmission boundary.

On the contrary, if the uplink and downlink switching periods of different base stations in the system are different, the existing remote interference management mechanism cannot work normally.

Fig. 4 is a schematic diagram illustrating that RIM-RS transmitted by the ground network cannot be detected by the ATG base station, and as shown in fig. 4, when the atmospheric waveguide phenomenon occurs, the base station of the ground network and the ATG base station may generate far-end interference with each other. For operators, the ground network is deployed in a large scale and is a core service of the operators, so that the ground network has the highest service priority. The ATG network has small deployment scale, and is a value-added service with relatively low service priority. Therefore, when the atmospheric waveguide phenomenon occurs, the ATG base station needs to execute interference avoidance operation so as to avoid interference on the performance of the ground network; and the ground network does not need to avoid the interference of the ground network to the ATG network.

The time domain transmission position of the RIM-RS in the related art is designed according to the assumption of a quasi-homogeneous network. In the diagram shown in fig. 4, for the terrestrial NR network, the RIM-RS is configured in the last Downlink (DL) slot in each TDD uplink and downlink switching period (2.5 ms).

Note that different base stations (gnbs) in the ground network are configured to transmit the RIM-RS in different TDD uplink/downlink switching periods, so as to reduce the transmission overhead of the RIM-RS, and the number of the TDD uplink/downlink switching period for transmitting the RIM-RS and the base station group id (set id) have a one-to-one mapping relationship, so that a receiver of the RIM-RS reversely deduces the number of the base station for transmitting the RIM-RS according to the detected number of the TDD uplink/downlink switching period in which the RIM-RS is located, so as to assist the subsequent network planning and network optimizing operation.

In the schematic diagram shown in fig. 4, the ATG network employs a TDD uplink/downlink switching period of 10ms, which includes 10 DL slots (slots), 4 special slots, 6 UL slots, and a subcarrier spacing of 30 kHz.

In fig. 4, assuming that the spatial propagation delay of the RIM-RS signal is 1ms (equivalent to 300km propagation distance), then the RIM-RS transmitted by gNB3 and gNB4 of the terrestrial network just falls in the UL slot of the ATG base station and can be listened by the ATG base station; however, RIM-RSs transmitted by gNB1 and gNB2 of the terrestrial network fall in DL slots of the ATG base station and thus cannot be heard by the ATG base station. That is, if DL signals transmitted by ATG base stations interfere with the gnbs (e.g., gNB1 and gNB2) of the terrestrial network, RIM-RSs transmitted by the gnbs will not be heard by the ATG base stations, and thus the ATG base stations cannot perform corresponding interference back-off operations to reduce interference to the interfered ground network base stations.

Aiming at the problem that an ATG base station cannot detect RIM-RS sent by part of ground network base stations due to the fact that different TDD uplink and downlink switching periods are used by an ATG and the ground network, the invention provides an enhanced RIM-RS sending method to solve the problem of remote interference management under a non-quasi-homogeneous network.

An embodiment of the present invention provides a sending method of a RIM-RS, which is applied to a first communication device, and as shown in fig. 5A, the sending method includes:

step 101: at least two sets of RIM-RSs are configured for the ground network, configuration information of each RIM-RS comprises one or two uplink and downlink conversion periods, and the configuration of the uplink and downlink conversion periods of the at least two sets of RIM-RSs is different.

In this embodiment, the first communication device configures at least two sets of RIM-RSs, where the at least two sets of RIM-RSs include different uplink and downlink conversion periods, and reasonably configures time domain transmission resources to ensure that the ATG-RIM-RSs can be listened by the ATG base station, thereby solving the problem of remote interference management in the non-quasi-homogeneous network.

The configuration refers to configuring the RIM-RS parameters for the base station through OAM configuration, namely through OAM.

For each set of RIM-RS, the configuration information includes at least: 1 uplink-downlink switching period or 2 uplink-downlink switching periods; and the uplink and downlink conversion periods of the at least two sets of RIM-RSs are different.

Optionally, if the at least two sets of RIM-RSs only include one uplink/downlink switching period, T1> T2, and T1 is an integer multiple of T2, where T1 is the uplink/downlink switching period of a first set of RIM-RSs in the at least two sets of RIM-RSs, and T2 is the uplink/downlink switching period of a second set of RIM-RSs in the at least two sets of RIM-RSs;

The first communication device may be a base station, including a macro station, a small station, or a relay node or an IAB node, and specifically, the first communication device may be a base station of a terrestrial network.

In the related art, the first communication device may be configured with 1 set or 2 sets of RIM-RS, which are referred to as RIM-RS type 1 and RIM-RS type 2, respectively. The 2 sets of RIM-RSs are configured by using the same uplink-downlink switching period. The configuration of the RIM-RS uplink and downlink switching period comprises 1 or 2 uplink and downlink switching periods which are respectively marked as

In this embodiment, the first communication device (e.g., a ground network base station) additionally sends a set of RIM-RS based on the existing RIM-RS type 1 and RIM-RS type 2, which can be denoted as RIM-RS type 3. Wherein the first communication device is operable to select: and transmitting RIM-RS type 1 and RIM-RS type 3, or transmitting RIM-RS type 1, RIM-RS type 2 and RIM-RS type 3.

The RIM-RS type 3 and the existing RIM-RS (namely RIM-RS type 1 and RIM-RS type 2) use different uplink and downlink conversion period configurations, and the uplink and downlink conversion period of the RIM-RS type 3 is larger than that of the RIM-RS type 1.

In a specific embodiment, RIM-RS type 1 and RIM-RS type 2 only use 1 uplink and downlink conversion period, which is recorded as

RIM-RS type 3 only uses 1 uplink and downlink conversion period, and is recorded as

Wherein,

in another embodiment, RIM-RS type 1 and RIM-RS type 2 use 2 uplink and downlink switching periods, denoted as

RIM-RS type 3 also only uses 2 uplink and downlink switching periods, which are recorded as

Wherein,

at least 1 element has different values.

While RIM-RS type 3 only uses 1 uplink and downlink switching period, and is recorded as

Then

And is

Optionally, in the at least two sets of RIM-RS, an uplink/downlink switching period T1 of one set of RIM-RS is greater than an uplink/downlink switching period T2 of the other set of RIM-RS, and T1 is an integer multiple of T2; or

The uplink and downlink conversion period of one set of RIM-RS is T1, the uplink and downlink conversion period of the other set of RIM-RS is T2 and T3, and T1 is integral multiple of (T2+ T3).

In one embodiment, RIM-RS type 1 and RIM-RS type 2 use only 1 uplink and downlink switching period, which is recorded as

And is

And is

Is that

Integer multiples of.

For example, in FIG. 6,

RIM-RS type 3 only uses 1 speciesThe downlink switching period is recorded as

And is

Is that

Integer multiples of.

As shown in fig. 6, each ground network base station is configured with 2 sets or 3 sets of RIM-RS, i.e. is configured with RIM-RS type 1 and RIM-RS type 3; or is configured with RIM-RS type 1, RIM-RS type 2, and RIM-RS type 3.

The three types of functions are different, and after receiving the three types of RIM-RSs, other base stations can trigger different subsequent behaviors. Therefore, it is necessary to distinguish the three RIM-RSs by various methods (e.g., code domain and/or time domain methods) to avoid confusion.

In one embodiment, the three may be distinguished by code domain, and each set of RIM-RS is configured with a scrambling code ID set (a list of configured scrambling codes) including at least 1 scrambling code ID (scrambling codes). To distinguish between sets of RIM-RSs, it is possible to have no identical elements in the scrambling code ID sets of different RIM-RSs.

In one embodiment, the three can be distinguished by time domain, in the existing NR-RIM technology, each ground network base station is configured with only RIM-RS type 1, or is configured with RIM-RS type 1 and RIM-RS type 2 at the same time. If both RIM-RS type 1 and RIM-RS type 2 are configured, RIM-RS type 1 (denoted as RS-1 in the drawing) and RIM-RS type 2 (denoted as RS-2 in the drawing) have the same RIM-RS transmission period (RIM-RS transmission periodicity) but are located in different time domain intervals, as shown in FIG. 7.

As shown in fig. 7, different filling colors indicate set IDs of different base stations, and # n indicates a RIM-RS resource repeatedly transmitted by the set IDs. The RIM-RS type 1 transmitted by all base stations is located in the first half of the RIM-RS transmission period, and the RIM-RS type 2 transmitted by all base stations is located in the second half of the RIM-RS transmission period.

Starting time offset (denoted as T) of different RIM-RS types in RIM-RS transmission period_start) Can be calculated according to the following formula, for example:

wherein, T of RIM-RS type 1_start0; and T of RIM-RS type 2_startAnd determining according to the number of RIM-RS time domain resources occupied by the RIM-RS type 1. Wherein EnoughIndication disabled means that sufficient (energy) indication is disabled.

In particular, it is possible to use, for example,

indicates the total number of Set IDs for RIM-RS type 1, R₁Indicates the number of uplink and downlink switching periods (the number of continuous uplink-downlink switching periods for RIM-RS type 1) continuously occupied by each base station for transmitting RIM-RS type 1,

the number of candidate frequency domain resources (the number of candidate frequency domain resources configured in the network) representing the network configuration,

indicates the candidate for RIM-RS type 1The number of sequences (the number of sequences for the current RIM-RS resource) is selected. When the "end" indication function is disabled, R is configured for each set ID₁A time-frequency code resource; when the "enable" indication function is enabled, 2 · R is configured for each set ID₁And (4) time-frequency code resources.

As shown in FIG. 8, in order to simultaneously support RIM-RS type 1 and RIM-RS type 3, or simultaneously support RIM-RS type 1, RIM-RS type 2, and RIM-RS type 3, the starting transmission position (T _ Transmission _ DeviceIn RIM-RS transmission period) of different RIM-RS types may be configured_start) Different.

In one embodiment, T of RIM-RS type 1_start0; t of RIM-RS type 2_startDetermining according to the number of RIM-RS time domain resources occupied by RIM-RS type 1; and T of RIM-RS type 3_startAnd determining the total number of the RIM-RS time domain resources occupied by the RIM-RS type 1 and the RIM-RS type 2.

For example, for RIM-RS type 3, T can be determined according to the following formula_startIs (for RIM-RS type 3):

the first communication device does not listen to RIM-RS type 3.

The present embodiment includes the following three execution bodies: a victim base station of a terrestrial network, an offender base station of the terrestrial network, and an ATG offender base station. In terms of physical devices, the interfered base station of the terrestrial network and the interfering base station of the terrestrial network may be the same base station.

The behavior of the interfered base station and/or the interfering base station of the ground network starting to transmit and ending to transmit the RIM-RS type 1 and/or the RIM-RS type 2 is consistent with the flow diagram shown in fig. 1, and is not described herein again.

The difference from terrestrial networks is that the basic design principle of ATG networks is: the ATG base station cannot interfere with the base station of the terrestrial network, but allows the base station of the terrestrial network to interfere with the ATG base station.

Thus, the sending and listening of the RIM-RS type 3 is a unidirectional behavior, i.e. only the disturbed base station of the terrestrial network (i.e. the first communication device) sends the RIM-RS type 3; only the ATG base station (i.e., the second communication device) listens to RIM-RS type 3 and triggers a subsequent interference back-off operation.

Wherein the ground network base station (i.e., the first communication device) does not need to listen to RIM-RS type 3, and the ATG base station (i.e., the second communication device) does not need to transmit and listen to RIM-RS type 1 and/or RIM-RS type 2.

The process flow for RIM-RS type 3 is as follows:

step 0: the OAM configures all ATG base stations to periodically listen to RIM-RS type 3. If the ATG base station detects RIM-RS type 3, judging that the ATG base station is an interference base station, and entering step 3;

step 1: the atmospheric waveguide phenomenon occurs, and the downlink transmission of the disturbing base station (including a ground network base station and an ATG base station) generates far-end interference on the uplink reception of a disturbed base station of a ground network;

step 2: when the ground network disturbed base station detects that the IoT lifting exceeds the threshold, starting to continuously send RIM-RS type 1 and RIM-RS type 3 and continuously monitor RIM-RS type 1 and RIM-RS type 2 until an event C occurs;

and step 3: and the ATG interference base station starts a far-end interference suppression scheme on a downlink symbol generating far-end interference to the interfered base station and continuously monitors RIM-RS type 3 until an event C occurs.

Wherein, the event C is: and when the disturbing base station and/or the disturbed base station can not detect any RS (for example, the ground network base station can not detect RIM-RS type 1 and RIM-RS type 2, and the ATG base station can not detect RIM-RS type 3), the atmospheric waveguide phenomenon is considered to disappear. At the moment, the ATG interference base station stops an interference suppression mechanism and recovers a normal downlink sending behavior; the interfered base station of the ground network stops sending the RIM-RS type 1 and the RIM-RS type 3; and the interfered base station and the interfering base station of the ground network stop monitoring the RIM-RS type 2.

In addition, when the first communication device does not detect any type of RIM-RS, the transmission of any type of RIM-RS including RIM-RS type 1, RIM-RS type 2, and RIM-RS type 3 is stopped.

In this embodiment, on the premise of not changing the configuration of the RIM-RS designed for the ground homogeneous network in the related art, a set of RIM-RS signals dedicated to interception and detection by the ATG base station, denoted as ATG-RIM-RS, is additionally configured for the ground network with respect to the frame structure configuration of the ATG network. And the ATG-RIM-RS can be ensured to be listened by the ATG base station by reasonably configuring time domain sending resources.

In the second embodiment of the present invention, as shown in fig. 5B, a sending method of RIM-RS is applied to a first communication device, and includes:

step 102: and configuring at least one set of RIM-RS for the ground network, wherein the time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period changes along with time.

In this embodiment, the transmission resource of the RIM-RS changes with time, and it can be ensured that at least some of the RIM-RS transmitted by any ground network base station periodically can be listened by the ATG base station, thereby solving the problem of remote interference management in the non-quasi-homogeneous network.

Optionally, the transmission resource of the RIM-RS is variable

Determining, wherein,

The time domain position of the transmission resource of the RIM-RS in the RIM-RS transmission period changes along with the time, and the time domain resource indication thereof

Determined by at least one of:

initial time domain offset, the number of candidate sequences of the current RIM-RS type, the number of continuous uplink and downlink conversion cycles of the current RIM-RS type, a device identifier set ID of the first communication device, and a time parameter

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function.

In one embodiment, the time parameter

Is the number of RIM-RS transmission periods (RIM-RS transmission periods) from a particular time instant.

In one embodiment of the present invention, the substrate is,

calculated according to the following formula:

wherein,

indicating the total number of Set IDs for RIM-RS type 1 (the total number of Set IDs for RIM-RS type 1),

Indicates the total number of Set IDs for RIM-RS type 2 (the total number of Set IDs for RIM-RS type 2).

Alternatively,

its frequency domain resource indication

Determined by the following equation:

sequence indication thereof

Determined by the following equation:

wherein,

optionally, the first communication device is a base station of a terrestrial network and/or an ATG base station.

In an exemplary embodiment, the time domain position of the RIM-RS transmission resource within a RIM-RS transmission period varies over time, comprising:

determining a resource indication corresponding to a first set ID according to a first formula

Wherein,

wherein,

is a time domain resource indication (resource indices in time domain), T_startIs the starting time offset;

the number of candidate sequences (the number of sequence candidates for the current RIM-RS resource) indicating the current RIM-RS type;

wherein R represents the number of continuous uplink-downlink switching periods for the current RIM-RS type (the number of continuous uplink-downlink switching periods for RIM-RS type i); n is_setIDA set ID representing the first communication device; f (-) is an arbitrary function;

the physical meaning of (A) is: the number of basic time units occupied by the current RIM-RS type in the time domain is R continuous uplink and downlink conversion period numbers.

Wherein,

calculated according to the following formula:

wherein,

Indicates the total number of Set IDs for RIM-RS type 2 (the total number of Set IDs for RIM-RS type 2);

the number of candidate frequency domain resources (the number of candidate frequency domain resources configured in the network) representing the network configuration.

In this embodiment, the RIM-RS transmission resource (a resource for RIM-RS transmission) is varied

The definition, wherein,

and resource indication in the time domain parameter list, the frequency domain parameter list and the sequence parameter list respectively corresponding to the OAM configuration.

Optionally, the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

f(x,t)＝a+((x+t)mod(b-a+1))

In one embodiment of the present invention, the substrate is,

wherein,

f (-) is an arbitrary function. In one embodiment of the present invention, the substrate is,

in an alternative embodiment of the present invention,

is composed of

To a mapping function. The specific formula of f (-) is not limited herein.

In another exemplary embodiment, the time domain position of the RIM-RS transmission resource within a RIM-RS transmission period varies with time, further comprising:

according to the firstA formula determines a resource indication corresponding to a first set ID

Wherein,

wherein,

wherein,

for time domain resource indication (resource indexes in time domain),

For frequency domain resource indication (resource indexes in frequency domain),

Is sequence indication (resource indices for sequence), T_startIs the starting time offset;

wherein R represents the number of continuous uplink-downlink switching periods for the current RIM-RS type (the number of continuous uplink-downlink switching periods for RIM-RS type i); n is_setIDA set ID representing the first communication device; f (-) is an arbitrary function.

Calculated according to the following formula:

wherein,

S_startCalculated according to the following formula:

wherein,

indicates the number of candidate sequences for RIM-RS type 1 (the number of candidate sequences assigned for RIM-RS type 1).

In another exemplary embodiment, the RIM-RS transmission resource (a resource for RIM-RS transmission)ion) quilt variables

The definition, wherein,

in an alternative embodiment of the present invention,

is composed of

To a mapping function. The specific formula of f (-) is not limited herein.

In this embodiment, a time domain resource mapping method of the RIM-RS in the related art is modified, so that the time domain position of the RIM-RS in the RIM-RS transmission period (e.g., 2min) changes with time, so as to ensure that at least some of the RIM-RS periodically transmitted by any ground network base station can be detected by the ATG base station. The embodiment can save the overhead of sending the RIM-RS by the ground network, the ground network normally sends the RIM-RS, the RIM-RS can be sensed by the base stations of other homogeneous ground networks and can also be sensed by the ATG base station, and because new RIM-RS configuration is not required to be introduced, the resource overhead of sending the RIM-RS can be saved, and the method has good expansibility.

An embodiment of the present invention further provides a sending method of RIM-RS, which is applied to a second communications device, and as shown in fig. 9, includes:

step 201: configuring a set of RIM-RS for a ground-to-air network, wherein configuration information of the RIM-RS comprises 1 uplink and downlink conversion period or 2 uplink and downlink conversion periods;

step 202: periodically listening for a RIM-RS transmitted by the first communication device, said second communication device not transmitting any RIM-RS.

Optionally, the method further comprises at least one of:

An embodiment of the present invention further provides a sending apparatus of a RIM-RS, which is applied to a first communication device, as shown in fig. 10, and includes:

the configuration module 31 is configured to configure at least two sets of RIM-RS for the ground network, where configuration information of each RIM-RS includes one or two uplink/downlink conversion periods, and the uplink/downlink conversion periods of the at least two sets of RIM-RS are configured differently.

Alternatively,

a processing module to perform at least one of:

the first communication device does not listen to RIM-RS type 3.

In another embodiment of the present invention, the configuring module 31 is configured to configure a set of RIM-RS for the ground network, and a time domain position of a transmission resource of the RIM-RS in a RIM-RS transmission period changes with time.

Optionally, the transmission resource of the RIM-RS is variable

Determining, wherein,

Determined by at least one of:

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function.

Alternatively,

its frequency domain resource indication

Determined by the following equation:

sequence indication thereof

Determined by the following equation:

wherein,

optionally, the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

An embodiment of the present invention further provides a sending apparatus of a RIM-RS, which is applied to a first communication device, as shown in fig. 11, and includes a processor 41 and a transceiver 42,

the processor 41 is configured to configure at least two sets of RIM-RS for the ground network, where configuration information of each RIM-RS includes one or two uplink/downlink conversion periods, and configurations of the uplink/downlink conversion periods of the at least two sets of RIM-RS are different.

Alternatively,

the first communication device does not listen to RIM-RS type 3.

In another embodiment of the present invention, the processor 41 is specifically configured to configure a set of RIM-RS, and a time domain position of a transmission resource of the RIM-RS in a RIM-RS transmission period varies with time.

Optionally, the transmission resource of the RIM-RS is variable

Determining, wherein,

Determined by at least one of:

Optionally, time domain resource indication

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function.

Alternatively,

its frequency domain resource indication

Determined by the following equation:

sequence indication thereof

Determined by the following equation:

wherein,

optionally, the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

An embodiment of the present invention further provides a sending apparatus of a RIM-RS, which is applied to a second communication device, as shown in fig. 12, and includes:

a configuration module 51, configured to configure a set of RIM-RS for a ground-to-air network, where configuration information of the RIM-RS includes 1 uplink/downlink conversion period or 2 uplink/downlink conversion periods;

and the listening module 52 is configured to listen to the RIM-RS sent by the first communication device periodically, and not send any RIM-RS.

Optionally, the listening module 52 is further configured to perform at least one of the following:

Optionally, the listening module 52 is configured to perform any one of the following:

An embodiment of the present invention further provides a sending apparatus of a RIM-RS, which is applied to a second communication device, as shown in fig. 13, and includes a processor 61 and a transceiver 62,

the processor 61 is configured to configure a set of RIM-RS for the ground-to-air network, where configuration information of the RIM-RS includes 1 uplink/downlink conversion period or 2 uplink/downlink conversion periods;

the transceiver 62 is configured to periodically listen for RIM-RSs transmitted by the first communication device without transmitting any RIM-RSs.

Optionally, the transceiver 62 is further configured to perform at least one of:

Optionally, the transceiver 62 is configured to perform any of the following:

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, user terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing user terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing user terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing user terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing user terminal device to cause a series of operational steps to be performed on the computer or other programmable user terminal device to produce a computer implemented process such that the instructions which execute on the computer or other programmable user terminal device provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or user terminal 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 user terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or user terminal device that comprises the element.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A sending method of a RIM-RS is applied to a first communication device, and is characterized by comprising the following steps:

2. The sending method of RIM-RS of claim 1, wherein at least two sets of RIM-RS have different configurations of uplink and downlink switching periods, and any one of the following conditions is satisfied,

3. The transmission method of RIM-RS according to claim 2,

4. The transmission method of RIM-RS according to claim 1,

the configuration information of each RIM-RS also comprises a scrambling code Identification (ID) set, wherein the scrambling code ID set comprises at least 1 scrambling code ID, and elements in the scrambling code ID sets of different RIM-RSs are different.

5. The transmission method of claim 1, wherein the at least two sets of RIM-RSs have different initial time domain offsets within a RIM-RS transmission period.

6. The method of claim 1, wherein the at least two sets of RIM-RS comprise a first RIM-RS type 1 and a third RIM-RS type 3, and the method comprises at least one of:

the first communication device does not listen to RIM-RS type 3.

7. The transmission method of the RIM-RS of any of claims 1-6, wherein the first communication device is a base station of a terrestrial network.

8. A sending method of a RIM-RS is applied to a first communication device, and is characterized by comprising the following steps:

9. The transmission method of the RIM-RS of claim 8, wherein the transmission resources of the RIM-RS have time-domain positions within a RIM-RS transmission period that vary with time, and wherein the time-domain resource indication indicates

Determined by at least one of:

the method comprises the steps of starting time domain offset, the number of candidate sequences of the current RIM-RS type, the number of continuous uplink and downlink conversion periods of the current RIM-RS type, a device identification setID of first communication equipment and a time parameter.

10. The transmission method of RIM-RS of claim 9, wherein the time domain resource indication indicates

Determined by the following equation:

wherein, T_startIn order to initiate the time-domain shift,

indicates the number of candidate sequences of the current RIM-RS type,

is a time parameter;

is a positive integer; f (·, ·) is an arbitrary function;

and/or, frequency domain resource indication

Determined by the following equation:

and/or, sequence indication

Determined by the following equation:

wherein,

indicates the number of candidate sequences of the current RIM-RS type,

number of candidate frequency domain resources, n, representing network configuration_setIDA set ID representing the first communication device;

as a time parameter

Is a positive integer; s_startIs a positive integer; f (·, ·) is an arbitrary function;

wherein the function f (x, t) has at least one of the following properties:

f (x, t) is a one-to-one mapping function of x;

11. The transmission method of the RIM-RS of any of claims 8-10, wherein the first communication device is a base station of a terrestrial network.

12. A sending method of a RIM-RS is applied to a second communication device, and is characterized by comprising the following steps:

13. The method of transmitting the RIM-RS of claim 12, wherein the method further comprises at least one of:

14. The method of claim 12, wherein the periodically listening for the RIM-RS transmitted by the first communication device comprises any one of:

monitoring a set of RIM-RS sent by first communication equipment, wherein the first communication equipment at least sends two sets of RIM-RS, and the uplink and downlink conversion periods of at least two sets of RIM-RS are different;

15. The transmission method of the RIM-RS of any of claims 12-14, wherein the second communication device is a ground-to-air network base station.

16. A transmission apparatus of RIM-RS, applied to a first communication device, comprising:

17. A transmission apparatus of RIM-RS, applied to a first communication device, comprising:

18. A transmission apparatus of RIM-RS is applied to a first communication device, and is characterized by comprising a processor and a transceiver,

19. A transmission apparatus of RIM-RS is applied to a first communication device, and is characterized by comprising a processor and a transceiver,

20. A transmission apparatus of RIM-RS, applied to a second communication device, comprising:

21. A transmission device of RIM-RS is applied to a second communication device and is characterized by comprising a processor and a transceiver,

22. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps in the method of transmitting a RIM-RS according to any of claims 1 to 15.

23. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps in the method of transmitting a RIM-RS of any one of claims 1 to 15.