WO2017211160A1

WO2017211160A1 - Data transmission method, macro base station, and user equipment

Info

Publication number: WO2017211160A1
Application number: PCT/CN2017/083991
Authority: WO
Inventors: 黄磊; 贾曙乔; 阿张本那姆
Original assignee: 华为技术有限公司; 威廉马什莱斯大学
Priority date: 2016-06-07
Filing date: 2017-05-11
Publication date: 2017-12-14
Also published as: CN107484248B; CN107484248A

Abstract

Disclosed in the present application are a data transmission method, comprising: a macro base station determines an outage probability distribution of communication links between UE units and first small cell base stations, wherein the outage probability distribution represents a relationship between the probability of the communication links having an outage and the number of the UE units, and the first small cell base stations comprise multiple small cell base stations; the macro base station determines, according to the outage probability distribution and from the first small cell base stations, second small cell base stations participating in data transmission; and the macro base station performs, by means of the second small cell base stations and in a high frequency band, the data transmission with the UE units. The macro base station of the present invention determines, according to an outage probability, a suitable number of small cell base stations, thus achieving an optimal system capacity in a condition of a communication link outage.

Description

Data transmission method, macro base station and user equipment

The present application claims priority to Chinese Patent Application No. 201610398506.1, entitled "Method of Data Transmission, Macro Base Station and User Equipment", which is filed on June 07, 2016, the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of communications, and in particular, to a method for data transmission in a communication field, a macro base station, and a user equipment.

Background technique

With the ever-increasing demands for data transmission rates, communication qualities, and the like for mobile communications today, existing frequency bands for mobile communications have become very crowded. However, in the millimeter-wave band of 6 GHz to 300 GHz, a large amount of spectrum resources are still not allocated. Introducing the millimeter wave band into cellular access communication and making full use of the large bandwidth resources of the millimeter wave band is one of the important research directions of the next generation 5G mobile communication technology.

In the existing research, the high frequency band represented by the millimeter wave band is mainly used in indoor short-range communication scenarios. In outdoor scenes, due to its complex terrain, high path loss in high frequency bands, weak ability to penetrate obstacles, and severe rain attenuation at certain frequency points, the application of high frequency bands in outdoor scenes is severely restricted. However, due to its short wavelength, the high frequency band is easy to implement a large-scale array antenna, and can achieve a large directional antenna gain by beam-forming technology, thereby effectively compensating for its high path loss, which is also high in the outdoor frequency band. The application of medium to long distance transmission of the scene offers the possibility.

In high-frequency communication systems, the high path loss caused by the high frequency band needs to be compensated by the high beam gain brought by the antenna array. The acquisition of high beam gain is based on beam alignment at both ends of the transceiver. Once the beam is mis-aligned at both ends, the received signal quality will drop dramatically and normal data communication will be interrupted. Therefore, in a high-frequency communication system, in order to ensure normal data communication, beam training and beam tracking are required to be performed periodically or irregularly, so that both ends of the transmitting and receiving can perform data using the optimal transmitting and receiving beam pairs. Transmission.

However, even if the communication link has been successfully established by beam training or beam tracking, the communication link may be interrupted due to changes in the surrounding environment. In high-frequency communication systems, the high-frequency channel characteristics are more likely to cause interruption of the communication link.

Therefore, in the process of data transmission in the high-frequency communication system, when the base stations operating in the high frequency band are scheduled by the corresponding method to achieve the optimal system capacity, the influence of the interruption of the communication link must be considered.

Summary of the invention

In view of this, the embodiments of the present application provide a data transmission method, a macro base station, and a user equipment, to solve the problem that the link interruption affects the system capacity optimization process of the high frequency communication system.

In a first aspect, a method of data transmission is provided, the method comprising:

The macro base station determines an outage probability distribution of the communication link, where the communication link is a link between the user equipment UE and the first small base station, and the outage probability distribution indicates a probability that the communication link is interrupted and the UE The relationship between the quantity, the first small base station includes a plurality of small base stations;

Determining, by the macro base station, a second small base station participating in the data transmission in the first small base station according to the outage probability distribution;

The macro base station performs the data transmission in the high frequency band by using the second small base station and the UE.

Therefore, in the embodiment of the present application, the macro base station determines an appropriate number of small base stations for communicating with the user equipment according to the interruption probability of the communication link, so that an optimal system capacity can be obtained in the presence of a communication link interruption.

In another embodiment, the macro base station determines an outage probability distribution of the communication link, including:

The macro base station receives the interrupt information sent by the UE, and the interrupt information is used to indicate whether the communication link is interrupted;

The macro base station determines the outage probability distribution according to the interrupt information.

As another embodiment, the macro base station receives the interrupt information sent by the UE, including:

The macro base station receives the interrupt information sent by the UE in a low frequency band by using a cellular link between the macro base station and the UE.

In another embodiment, the macro base station determines the outage probability distribution according to the interrupt information, including:

The macro base station calculates an outage probability distribution function for indicating the outage probability distribution according to the interrupt information.

The macro base station selects an outage probability distribution function for indicating the outage probability distribution among a plurality of predefined outage probability distribution functions according to the interrupt information.

In another embodiment, the macro base station determines, according to the outage probability distribution, a second small base station participating in the data transmission in the first small base station, including:

Determining, by the macro base station, the number of small base stations participating in the data transmission according to the outage probability distribution;

The macro base station selects the number of small base stations in the first small base station, and determines the number of small base stations as the second small base station.

In another embodiment, the macro base station determines, according to the outage probability distribution, the number of small base stations participating in the data transmission, including:

The macro base station determines the number of small base stations participating in the data transmission according to the outage probability distribution, the number of the UEs, and the number of radio linkes of the macro base station.

Further, the macro base station may determine, according to the outage probability distribution, the number of the UEs, and the number of radio linkes of the macro base station, the number of small base stations participating in the data transmission, so that the uplink connection The inbound link capacity and the downlink backhaul link capacity are equal or approximately equal, and the uplink access link capacity is related to the outage probability distribution, the number of the UE, and the number of small base stations participating in the data transmission. The downlink backhaul link capacity is related to the outage probability distribution, the number of radio linkes of the macro base station, and the number of small base stations participating in the data transmission.

It is assumed that the outage probability distribution function determined by the macro base station is p(n), and the number of second small base stations is M, according to the outage probability distribution p(n), the number of user equipments participating in the data transmission, and the macro base station. Number of radio link l, determine the uplink access link capacity

Uplink back link capacity

Downlink back link capacity

And downlink access link capacity

They are:

Wherein K ₁ , K ₂ , K ₃ and K ₄ are each a constant independent of n.

Further, according to the uplink access link capacity

Uplink back link capacity

Downlink back link capacity

And downlink access link capacity

The maximum capacity of the network system can be obtained as:

Suppose p(n) is a fixed probability, 0≤p(n)<1, according to formulas (1) to (5),

That is, the capacity of the network is limited by the downlink backhaul link capacity.

In an actual network, when the surrounding environment is unchanged, as the number of user devices participating in data transmission increases, the probability of interruption of the communication link increases, so there is

Assuming that p(n)=1-Ω(1/n), the maximum capacity bound of the network is:

Therefore, the capacity of the network depends on the uplink access link capacity.

And downlink backhaul link capacity

The minimum value in .

The capacity of the uplink access link based on the outage probability distribution function p(n) determined by the macro base station

As the number M of the second small base stations increases, the downlink backhaul link capacity increases.

Then, as the number M of the second small base stations increases, it decreases.

Based on the given p(n) and n values, according to Figure 4

with

a curve of the determination, determining the number M of suitable second small base stations, so that

when

The corresponding M value is the number of second small base stations that optimize the system capacity.

Alternatively, the interruption probability distribution function p(n) may include p ₁ (n)=1-q ₁ (n), p ₂ (n)=1-q ₂ (n), and p ₃ (n)=1- q ₃ (n), where q ₁ (n), q ₂ (n), and q ₃ (n) are probability distribution functions for three different successful transmissions, q ₁ (n)=Θ(1/(log n ² )),

And q ₃ (n)=Θ(1/n).

In another embodiment, the macro base station selects the number of small base stations in the first small base station, and determines the number of small base stations as the second small base station, including:

The macro base station selects the number of small base stations in the first small base station according to the physical location and/or link status of the first small base station, and determines the number of small base stations as the first Two small base stations.

As another embodiment, after the macro base station determines, according to the outage probability distribution, that the second small base station participating in the data transmission is determined in the first small base station, the method further includes:

The macro base station determines, in the second small base station, a small base station having a backhaul link;

The macro base station performs data transmission between the small base station having the backhaul link and the small base station not having the backhaul link, and the small base station not having the backhaul link is the second small base station Other small base stations other than the small base station having the backhaul link.

As another embodiment, the macro base station determines, in the second small base station, a small base station having a backhaul link, including:

The macro base station determines the small base station with the backhaul link in the second small base station according to the physical location and/or the link state of the second small base station.

Further, the macro base station may select the physical location of the second small base station and/or the corresponding link status, etc. The second small base stations of the number M are divided into L groups, and a second small base station with the best link state is selected from each group as a small base station with a backhaul link, and other small base stations in each group pass Data transmission between the small base station having the backhaul link and the macro base station in the group.

Optionally, after the determining, by the macro base station, the second small base station, the method further includes:

The macro base station sends a scheduling indication message to the second small base station, and allocates a corresponding transmission resource to the second small base station for the data transmission.

In a second aspect, a method of data transmission is provided, the method comprising:

The user equipment UE determines the interruption information, the interruption information is used to indicate whether the communication link is interrupted, the communication link is a communication link between the UE and the first small base station, and the first small base station includes multiple Small base stations;

Transmitting, by the UE, the interruption information to the macro base station, so that the macro base station determines, in the first small base station, the second small base station participating in the data transmission according to the interruption information;

The UE performs the data transmission in a high frequency band by using the second small base station and the macro base station.

In another embodiment, the determining, by the UE, the interrupt information includes:

The UE measures a received power of a reference signal sent by the first small base station;

The UE determines the interrupt information according to a received power of the reference signal.

Optionally, the UE periodically measures the received reference signal received power RSRP, and determines whether a link interruption occurs according to the RSRP.

In another embodiment, the determining, by the UE, the interrupt information according to the received power of the reference signal includes:

If the difference between the received power of the reference signal in the current period and the received power of the reference signal in the previous period is greater than the interruption threshold, the determining, by the UE, that the interruption information includes indicating that the communication link is interrupted Information.

Optionally, the interrupt threshold is 20 dB.

If the difference between the RSRP measured by the current period and the RSRP measured in the previous period is less than 20 dB, that is, the RSRP of the current period is 20 dB or more smaller than the RSRP of the previous period, the link is considered to be not interrupted, and the UE determines that the interrupt information includes Information indicating that the link is not interrupted, for example, "0" indicates that no link interruption occurs; if the difference between the RSRP measured by the current period and the RSRP measured in the previous period is greater than 20, the link is considered to have been interrupted. The UE determines that the interrupt information includes information indicating a link interruption, for example, "1" indicates that a link interruption has occurred.

As another embodiment, the sending, by the UE, the interrupt information to the macro base station includes:

The UE sends the interrupt information to the macro base station in a low frequency band by using a cellular link between the macro base station and the UE.

In this way, the user equipment detects the link interruption condition and feeds back the interruption information to the macro base station, so that the macro base station can determine an appropriate number of small base stations for communicating with the user equipment according to the interruption probability of the communication link, thereby being able to Optimal system capacity is obtained in the presence of a communication link disruption.

In a third aspect, a macro base station is provided for performing the method of any of the above first aspect or any of the possible implementations of the first aspect. Specifically, the macro base station includes:

a first determining module, configured to determine an outage probability distribution of the communication link, where the communication link is a link between the user equipment UE and the first small base station, where the outage probability distribution indicates that the communication link is interrupted a relationship between a probability and a quantity of the UE, the first small base station comprising a plurality of small base stations;

a second determining module, configured to: according to the interruption probability distribution determined by the first determining module, in the first Determining, in the small base station, a second small base station participating in the data transmission;

a transmitting module, configured to perform, by the second small base station determined by the second determining module, the data transmission in the high frequency band with the UE.

The fourth aspect provides a user equipment, where the method in any of the foregoing possible implementations of the second aspect or the second aspect is provided, where the user equipment includes:

a determining module, configured to determine interrupt information, where the interrupt information is used to indicate whether an interruption occurs in a communication link, where the communication link is a communication link between the UE and a first small base station, the first small base station Including a plurality of small base stations;

a transmission module, configured to send, to the macro base station, the interruption information determined by the determining module, so that the macro base station determines, in the first small base station, the second small base station participating in the data transmission according to the interruption information. ;

The transmission module is further configured to perform the data transmission in the high frequency band by using the second small base station and the macro base station.

In a fifth aspect, a macro base station is provided, the macro base station comprising a processor, a memory and a transceiver, the transceiver may comprise a transmitter and a receiver, the transmitter and the receiver respectively for Transmitting and receiving information during communication, the memory is for storing instructions, the processor is configured to execute the memory stored instructions, and execution of the instructions stored in the memory causes the processor to perform the first aspect or A method in a possible implementation of any of the aspects of the first aspect. Specifically, the processor is specifically configured to:

Determining an outage probability distribution of the communication link, the communication link being a link between the user equipment UE and the first small base station, the outage probability distribution indicating a probability of interruption of the communication link and the number of the UE a relationship between the first small base station and a plurality of small base stations;

Determining, in the first small base station, a second small base station participating in the data transmission according to the outage probability distribution;

The transceiver is configured to perform the data transmission by the second small base station and the UE determined by the processor in a high frequency band.

In a sixth aspect, a user equipment is provided, the user equipment comprising a processor, a memory and a transceiver, the transceiver may comprise a transmitter and a receiver, the transmitter and the receiver respectively for Transmitting and receiving information during communication, the memory is for storing instructions, the processor is configured to execute the memory stored instructions, and execution of the instructions stored in the memory causes the processor to perform the second aspect or A method in a possible implementation of any of the aspects of the second aspect. Specifically, the processor is specifically configured to:

For determining interrupt information, the interrupt information is used to indicate whether an interruption occurs in a communication link, the communication link is a communication link between the UE and a first small base station, and the first small base station includes multiple Small base station

The transceiver is configured to send the interrupt information determined by the processor to a macro base station, so that the macro base station determines, in the first small base station, to participate in the data transmission according to the interruption information. Two small base stations;

The transceiver is further configured to perform the data transmission in a high frequency band by using the second small base station and the macro base station.

A seventh aspect, a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.

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

Based on the above technical solution, the macro base station determines an appropriate number of small base stations for communicating with the user equipment according to the interruption probability of the communication link, so that an optimal system capacity can be obtained in the presence of a communication link interruption.

DRAWINGS

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

2 is a schematic diagram of data transmission under the high frequency network architecture of the embodiment of the present application.

3 is a flow interaction diagram of a method for data transmission in an embodiment of the present application.

FIG. 4 is a graph showing the mapping relationship between the number of small base stations participating in data transmission and the uplink access link capacity and downlink backhaul link capacity, respectively, in the embodiment of the present application.

FIG. 5 is a structural block diagram of a macro base station according to an embodiment of the present application.

FIG. 6 is a structural block diagram of a user equipment according to an embodiment of the present application.

FIG. 7 is a structural block diagram of a macro base station according to an embodiment of the present application.

FIG. 8 is a structural block diagram of a user equipment according to an embodiment of the present application.

detailed description

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

It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Universal Mobile Telecommunication System (UMTS) , and other current communication systems, and especially for future 5G systems.

It should be understood that, in the embodiment of the present application, a user equipment (User Equipment, UE) may be referred to as a terminal, a mobile station (Mobile Station, MS), or a mobile terminal (Mobile Terminal). A Radio Access Network (RAN) communicates with one or more core networks. For example, the user equipment may be a mobile phone (or "cellular" phone) or a computer with a mobile terminal, etc., for example, a user equipment. It can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application. The wireless communication system shown in FIG. 1 includes a three-layer network architecture including a macro base station and a plurality of small base stations, which can provide communication coverage for a specific geographical area and can be located in the coverage area. User equipment communicates. The wireless communication system further includes a plurality of user equipments located within the coverage of the macro base station. The user equipment can be mobile or fixed.

It should be understood that the macro base station has a large coverage area and can schedule small base stations and user equipment. The small base station has a small coverage area and a small system capacity, and can perform data transmission between the macro base station and the user equipment. For example, the small base station can include a wireless router used in a general home or office. The macro base station in the embodiment of the present application may also be referred to as a "macro station", a "high frequency macro station" or a "millimeter wave macro station", etc., and the small base station may also be referred to as a "small station", a "high frequency station" or a "millimeter". The method performed by the macro base station and the small base station in the embodiment of the present application may also be performed by other network devices, and the method performed by the user equipment may also be performed by other terminal devices, which is not limited in this application. .

It should be further understood that the embodiment of the present application is applied to a scenario in which a high-frequency communication system is integrated in an access and backhaul, wherein a macro base station and a user equipment UE perform relay transmission of data in a high frequency band through a small base station, for example, millimeters. Wave band.

In the three-layer network architecture, the lowest layer network is the access link layer between the high frequency station and the user equipment. At this level, the high frequency station and the user equipment transmit data through the high frequency band. The middle layer network is a high frequency station A relay link layer with a high-frequency station, at which high-frequency stations and high-frequency stations transmit data through a high-frequency band, and transmit user equipment data from one high-frequency station to another. High frequency station. The uppermost network is the backhaul link layer between the high frequency macro station and the high frequency small station. At this level, the high frequency macro station and the high frequency small station transmit data through the high frequency band. The high frequency macro station is connected to the core network by wire, for example, optical fiber, and the data of the user equipment must interact with the core network through the high frequency macro station. In addition to the user-Plane data transmission through the high-frequency band and the high-frequency station, the high-frequency macro station can also perform control-Plane data interaction through the traditional cellular band and the high-frequency station and user equipment. . Similarly, the high-frequency station can perform user plane data transmission through the high frequency band and the high frequency macro station, and can also perform control layer data interaction through the traditional cellular frequency band and the high frequency macro station.

The following describes the manner of data transmission in the embodiment of the present application by using FIG. 2 as an example. FIG. 2 is a schematic diagram of data transmission in a high-frequency network architecture according to an embodiment of the present application. It should be understood that data transmission between the user equipment and the macro base station may be performed by the small base station, and further, the user equipment may also send data to the small base station having the backhaul link through the small base station without the backhaul link, and pass the data. The small base station with the backhaul link is sent to the macro base station, and the macro base station can also send data to the small base station without the backhaul link through the small base station with the backhaul link, and through the small base station without the backhaul link. Sent to the user device. The macro base station 10, the small base station 20 and the user equipment 30 are shown in Fig. 2, wherein the small base station 20 includes at least one small base station, such as a small base station 21, a small base station 22, a small base station 23, a small base station 24, a small base station 25, and a small base station. Base station 26, user equipment 30 includes at least one user equipment such as user equipment 31 and user equipment 32. The user equipment 31 can be a source user equipment, and the user equipment 32 can be a destination user equipment. The source user equipment 31 transmits data to the destination user equipment 32 through the small base station and the macro base station. The small base station 21 and the small base station 22 may be high frequency small base stations having a backhaul link, and the small base station 23 to the small base station 26 may be high frequency small base stations having no backhaul link.

According to FIG. 2, the process of transferring data from a source user device to a destination user device can be divided into the following four steps. It should be understood that the source user equipment 31 herein may include multiple user equipments, and the destination user equipment 32 may also include multiple user equipments, and multiple user equipments may share the same small base station or use different small base stations.

First, each user equipment selects a small base station, for example, the user equipment 31 selects the small base station 24 as its intermediate destination node. All user equipments pass through the high frequency channel and simultaneously transmit their respective different data to the corresponding intermediate destination nodes.

Next, a total of L high-frequency small base stations are selected for uplink backhaul link transmission, where L is the maximum number of radio frequency links that the high-frequency macro base station 10 can simultaneously perform data transmission. All the small base stations in the system are divided into L groups, and one small base station in each group performs uplink backhaul link transmission. For example, the small base station 21 shown in FIG. 2 is a small base station with a backhaul link, and the group Other high frequency small base stations, such as small base stations 24, need to transmit data to the high frequency small base station 21 for uplink backhaul link transmission, and then to the high frequency macro base station 10 by the small base station 21.

Thereafter, in the downlink, the high frequency macro base station 10 selects L small base stations, for example, the small base station 22, for downlink backhaul link transmission. The data is first transmitted to the small base station 22 through the downlink backhaul link, and then transmitted to the small base station 25 having no backhaul link through the small base station 22 having the backhaul link.

Finally, the small base station 25 transmits data to the destination user equipment 32 by accessing the high frequency channel.

Based on the scenario described above, three algorithms for dynamic resource allocation are proposed in the prior art, taking the spectral efficiency of the backhaul link and the access link as input, and adjusting the wireless backhaul link and the wireless access through corresponding algorithms. The ratio of the frequency resources of the link resources, thereby optimizing the operation of the system capacity. However, in a high-frequency communication system in which access and transmission are integrated, there is inevitably a link interruption. Among them, the type of link interruption includes two categories: first The class is a temporary interruption, that is, the movement of the pedestrian, the car or the surrounding reflector blocks the communication link, resulting in the interruption of the communication transmission; the other is the permanent interruption, mainly due to the surrounding buildings and vegetation. The interruption of the communication transmission. The method assumes that the spectrum efficiency of all access links is the same, and does not consider the link interruption problem that is prone to occur in high frequency communication systems.

Therefore, in the embodiment of the present application, when data transmission is performed in a high frequency system, the high frequency macro base station determines a small base station for participating in data transmission according to the outage probability of the system, thereby being able to obtain the most in the presence of a communication link interruption. Excellent system capacity.

FIG. 3 illustrates a flow interaction diagram of a method of data transmission in accordance with an embodiment of the present application. The macro base station 10, the second small base station 20, and the user equipment 30 are shown in FIG. The method performed by the macro base station 10 and the small base station 20 in FIG. 3 may also be performed by other network devices, and the method performed by the UE 30 may also be performed by other terminal devices, which is not limited herein. The second small base station 20 is a small base station for participating in the data transmission, and the UE 30 includes at least one user equipment participating in the data transmission. As shown in FIG. 3, the specific process of data transmission includes:

301. The UE 30 determines the interrupt information.

Specifically, the UE 30 detects the interruption of the communication link in the data transmission process of the high frequency band, and feeds back to the macro base station 10, so that the macro base station 10 can determine the second system that can optimize the system capacity according to the interruption condition. Small base station 20. The communication link is a communication link between the UE 30 and the first small base station, and the interrupt information is used to indicate whether the communication link is interrupted. The first small base station includes a plurality of small base stations that can be used for data transmission, and the second small base stations 20 are all or a part of small base stations in the first small base station.

It should be understood that the small base station 20 is taken as an example of the second small base station. The small base station 20 may also be referred to as the second small base station 20 as a target node for performing data transmission between the macro base station 10 and the user equipment 30. The UE 30 and the macro base station 10 perform data transmission through the second small base station 20. The uplink data sent by the UE 30 is transmitted to the target node, and is sent by the target node to the macro base station 10, and the downlink data transmission sent by the macro base station 10 is transmitted. Go to the target node and send it to the UE 30 by the target node.

Optionally, the UE 30 determines the interrupt information, including:

The UE 30 measures the received power of the reference signal transmitted by the first small base station, and determines the interrupt information according to the received power of the reference signal.

In this embodiment, the UE 30 periodically measures Reference Signal Receive Power (RSRP) and determines whether a link interruption has occurred according to the RSRP. For example, if the UE 30 determines that the RSRP in the current period is smaller than the RSRP of the previous period, and the difference between the RSRP and the previous period is greater than the interruption threshold, the UE 30 may determine that an interruption has occurred, and the interruption information includes indicating the link interruption. Information.

For example, if the interrupt threshold is 20 decibels (dB), if the difference between the RSRP measured in the current period and the RSRP measured in the previous period is less than 20, that is, the RSRP of the current period is 20 dB less than the RSRP of the previous period, it is considered The link is not interrupted, and the UE 30 determines that the interrupt information includes information indicating that the link is not interrupted, for example, "0" is used to indicate that no link interruption occurs; if the RSRP of the current period is measured and the difference between the RSRP measured in the previous period If it is greater than 20, the link is considered to be interrupted, and the UE 30 determines that the interrupt information includes information indicating that the link is interrupted, for example, "1" indicates that a link interruption has occurred.

302. The UE 30 sends an interrupt message to the macro base station 10.

Specifically, the UE 30 can feed back the interruption of the communication link to the macro base station 10 by transmitting the interrupt information according to its own interruption condition. For example, the UE 30 may periodically transmit the interrupt information to the macro base station 10, so that the macro base station 10 determines the outage probability distribution according to the interrupt information, thereby determining the number with the UE 30 in the first small base station. According to the transmitted second small base station 20.

Alternatively, the UE 30 may transmit the interrupt information to the macro base station 10 in the low frequency band through the cellular link between the macro base station 10 and the UE 30.

303. The macro base station 10 determines an outage probability distribution.

Specifically, the macro base station 10 may determine an outage probability distribution to determine the number of second small base stations 20 that can optimize the system capacity according to the outage probability distribution, and the outage probability distribution may indicate the probability of the communication link being interrupted and the user equipment 30. The relationship between the number of communications links is the communication link between the UE 30 and the first small base station. For example, the macro base station 10 can receive the interrupt information sent by the UE 30, and determine the outage probability distribution according to the interrupt information. The macro base station 10 may include a central scheduling entity unit, and the central scheduling entity unit may determine the outage probability distribution according to the information about the user equipment included in the UE 30 or the related information fed back by the first small base station.

It should be understood that the outage probability distribution is a statistical result of a communication interruption condition of multiple user equipments. For example, among a plurality of user equipments included in the UE 30, the UE 31 can communicate with the small base station 23 and the small base station 24, and then the UE 31 can The macro base station 10 transmits the interruption information of the link between the UE 31 and the small base station 23, and the interruption information of the link between the UE 31 and the small base station 24; the UE 32 can communicate with the small base station 25 and the small base station 26, then the UE 32 can The macro base station 10 transmits the interruption information of the link between the UE 32 and the small base station 25, and the interruption information of the link between the UE 32 and the small base station 26. When the number of user equipments included in the user equipment 30 is gradually increased, the macro base station 10 can obtain the statistical result of the interruption of the user equipment, and select the capacity of the network system according to the interruption probability distribution determined by the statistical result. The second small base station 20.

Optionally, the macro base station 10 determines the outage probability distribution according to the interrupt information, including:

The macro base station 10 calculates an outage probability distribution function for indicating the outage probability distribution according to the interrupt information; or

Based on the interrupt information, the macro base station 10 selects an outage probability distribution function for indicating the outage probability distribution among a plurality of predefined outage probability distribution functions.

The outage probability distribution represents a relationship between the probability of interruption of the communication link and the number of UEs 30.

In this embodiment, the macro base station 10 can calculate an outage probability distribution function in real time based on the interrupt information transmitted by the UE 20. The macro base station 10 may also select one of the predefined plurality of outage probability distribution functions as the current outage probability distribution function according to the interrupt information transmitted by the UE 30.

Before the macro base station 10 selects an outage probability distribution function among the plurality of outage probability distribution functions, the method may further include: the macro base station 10 establishes a function library of the outage probability distribution function. The function library may add a new interrupt probability distribution function or remove an interrupt probability distribution function that is not selected for a long time according to the interrupt information fed back by the user equipment 30.

For example, the function library of the outage probability distribution function may include pre-defined K outage probability distribution functions, such as p1(n), p2(n), ..., pK(n), and the macro base station 10 may receive according to The interrupt information is arbitrarily selected among the K outage probability distribution functions as the current outage probability distribution function, thereby determining the second small base station 20 based on the outage probability distribution function.

It should be understood that the outage probability distribution may be represented by an outage probability distribution function, or may be represented by other methods such as a matrix or the like, which is not limited in this application.

304. The macro base station 10 determines the second small base station 20 according to the outage probability distribution.

Specifically, after the macro base station 10 determines the outage probability distribution, the second small base station 20 participating in the data transmission may be determined in the first small base station according to the outage probability distribution. For example, based on the outage probability distribution function, the calculation can make the system The number of second small base stations 20 having the best capacity is determined, and the second small base stations 20 having the number are determined in the first small base station according to certain scheduling criteria.

Optionally, the macro base station 10 determines, according to the outage probability distribution, the second small base station 20 in the first small base station, including:

Determining the number of small base stations participating in the data transmission according to the outage probability distribution;

The number of small base stations are selected in the first small base station, and the number of small base stations is determined as the second small base station 20.

In this embodiment, the macro base station 10 determines the number of second small base stations 20 capable of achieving optimal system capacity according to the outage probability distribution, and selects the number of small base stations in the first small base station according to certain scheduling criteria, and the macro base station 10 determines the selected small base station having the number as the second small base station 20. For example, the number of first small base stations that the macro base station 10 can schedule is 10, and the macro base station 10 determines that the system capacity can be optimal when the number of the second small base stations 20 is 4 according to the outage probability distribution. Then, the macro base station 10 can select 4 small base stations as the second small base station 20 among the 10 small base stations according to certain scheduling criteria, for example, select 4 small base stations with the best link conditions as the second small base station 20.

Optionally, the macro base station 10 determines, according to the outage probability distribution, the number of small base stations participating in the data transmission, including:

Based on the outage probability distribution, the number of UEs 30, and the number of radio linkes of the macro base station 10, the number of small base stations participating in the data transmission is determined.

Further, the macro base station 10 determines the number of small base stations participating in the data transmission according to the outage probability distribution, the number of UEs 10, and the number of radio linkes of the macro base station 10, so that the uplink access link capacity and downlink backhaul are determined. The link capacity is equal or approximately equal, wherein the uplink access link capacity is related to the outage probability distribution, the number of UEs 30, and the number of small base stations participating in the data transmission, and the downlink backhaul link capacity and the outage probability The distribution, the number of radio links of the macro base station 10 and the number of small base stations participating in the data transmission are related.

In this embodiment, the macro base station 10 can determine the uplink access link capacity and the downlink backhaul link capacity according to the outage probability distribution, the number of UEs 30 participating in the data transmission, and the number of radio linkes of the macro base station 10. The macro base station 10 determines the number of the second small base stations 20 based on the condition that the uplink access link capacity and the downlink backhaul link capacity are equal.

The following describes in detail how the macro base station 10 determines the number of second small base stations 20 based on the outage probability distribution in conjunction with equations (1) through (6). It is assumed here that the macro base station 10 determines an outage probability distribution function p(n) which is used to indicate the case of the outage probability distribution of the communication link. In the method of the embodiment of the present application, when the system capacity is optimized during the data transmission process, the impact of the interruption of the communication link on the system is considered.

First, determine the uplink access link capacity in consideration of the outage probability distribution.

Uplink back link capacity

Downlink back link capacity

And downlink access link capacity

According to the outage probability distribution function p(n) and the number of UEs participating in data transmission, the capacity boundary of the uplink access link can be obtained.

Satisfy:

Where n is the number of UEs participating in data transmission, p(n) is the outage probability distribution function, M is the number of second small base stations, ie the number of active high frequency small base stations, and K ₁ is a constant independent of n . K ₁ meets:

Where k is a wavelength-dependent constant, α is the path loss index, h is the height of the high-frequency small base station, P ^T is the transmission power of the user equipment, and G _T and G _R are the antenna gains of the transmitting end and the receiving end, respectively. N ₀ is the noise power spectral density and W is the system bandwidth.

According to the outage probability distribution function p(M) and the number of radio links of the macro base station, the capacity boundary of the uplink backhaul link can be obtained.

Satisfy:

Where l is the number of radio link of the macro base station, and K ₂ is a constant independent of n. Here, the outage probability distribution function p(M) and the above-described outage probability distribution function p(n) can be considered to use the same probability distribution function.

Similarly, the downlink backhaul link capacity in equations (4) and (5) can be obtained.

And downlink access link capacity

expression.

Wherein K ₂ , K ₃ and K ₄ are each a constant independent of n.

According to the uplink access link capacity

Uplink back link capacity

Downlink back link capacity

And downlink access link capacity

In turn, the maximum capacity of the network system can be obtained as follows:

If p(n) is assumed to be a fixed probability, 0 ≤ p(n) < 1, according to formulas (1) to (5), there is

However, in an actual network, when the surrounding environment is unchanged, as the number of user equipments participating in data transmission increases, the probability of interruption of the communication link increases, so there is

Assuming that p(n)=1-Ω(1/n), the maximum capacity bound of the network is:

According to formula (7), the capacity of the network depends on the uplink access link capacity.

And downlink backhaul link capacity

The minimum value in .

Based on the macro base station 10 to determine a good outage probability distribution function p(n), the capacity of the uplink access link

As the number M of the second small base stations 20 increases, the downlink backhaul link capacity increases.

Then, as the number M of the second small base stations 20 increases, it decreases.

Therefore, the number of second small base stations M as shown in FIG. 4 and the uplink access link capacity respectively

And downlink backhaul link capacity

The mapping relationship, based on the given p(n) and n values, can be based on Figure 4.

with

The variation curve determines the number M of suitable second small base stations 20 so that

when

The corresponding M value is the number of second small base stations 20 that optimize the system capacity.

For example, as shown in FIG. 4, the ordinate indicates the link capacity T(n) when the user equipment participating in the scheduling is n, and the abscissa indicates the corresponding second small base station 20 when the user equipment participating in the scheduling is n. Number M, curve 1, curve 2 and curve 3 are uplink access link capacity

Relationship with the number M of the second small base stations 20, and curve 4 is the downlink backhaul link capacity

The relationship with the number M of the second small base stations 20.

Among them, q ₁ (n), q ₂ (n) and q ₃ (n) are the probability distribution functions of three different successful transmissions respectively, and the probability distribution functions of the corresponding transmission interruptions are respectively p ₁ (n)=1 -q ₁ (n), p ₂ (n) = 1 - q ₂ (n) and p ₃ (n) = 1 - q ₃ (n). For example, q ₁ (n), q ₂ (n), and q ₃ (n) may be q ₁ (n)=Θ(1/(log n ² )), respectively.

And q ₃ (n)=Θ(1/n).

If the current macro base station 10 determines the outage probability distribution function according to the interrupt information fed back by the user equipment as p ₁ (n), then the intersection position of the curve according to the curve 1 and the curve 4, that is, the uplink access link capacity.

And downlink backhaul link capacity

With equal positions, the number of second small base stations 20 corresponding to the point, M=M ₁ , can be determined.

If the current macro base station 10 determines the outage probability distribution function according to the interrupt information fed back by the user equipment as p ₂ (n), then the intersection position of the curve according to the curve 2 and the curve 4, that is, the uplink access link capacity.

And downlink backhaul link capacity

With equal positions, the number of second small base stations 20 corresponding to the point, M=M ₂ , can be determined.

If the current macro base station 10 determines the outage probability distribution function according to the interrupt information fed back by the user equipment as p ₃ (n), then the intersection position of the curve according to the curve 3 and the curve 4, that is, the uplink access link capacity.

And downlink backhaul link capacity

With equal positions, the number of second small base stations 20 corresponding to the point can be determined.

If the M value according to the mapping relationship is not an integer, the M value may be rounded up or rounded down.

Based on the above theoretical analysis, the data transmission method proposed by the present application, the macro base station 10 determines an appropriate number of small base stations for communicating with the user equipment according to the interruption probability of the communication link, so that in the presence of the communication link interruption. Get the optimal system capacity.

After the macro base station 10 determines the number M of the second small base stations 20, the second small base station 20 of the number M may be determined in the first small base station according to a certain scheduling criterion, for example, selecting the M smallest link states. The base station serves as the second small base station 20 for participating in the transmission of data.

Optionally, after 304, the method may further include 305.

305. The macro base station 10 determines, in the second small base station 20, a small base station having a backhaul link.

In this embodiment, after the macro base station 10 determines the second small base station 20 based on the outage probability distribution, the small base station having the backhaul link can be further determined in the second small base station 20. For example, the macro base station 10 may determine, in the second small base station 20, a small base station having a backhaul link according to the physical location of each small base station in the second small base station 20 and/or a corresponding link state, and other small base stations. The data needs to be transmitted first to the small base station with the backhaul link, and then transmitted by the small base station with the backhaul link to the macro base station 10. The data sent by the macro base station 10 is first sent to the small base station with the backhaul link, and then It is then sent to other small base stations that do not have a backhaul link through the small base station with the backhaul link.

Further, the macro base station 10 may divide the selected second small base stations 20 of the number M into L groups according to the physical location of the second small base station 20 and/or the corresponding link status, and select from the groups. The second small base station with the best link state is used as the small base station with the backhaul link, and the other small base stations in each group perform data between the small base station with the backhaul link and the macro base station 10 in the group. transmission.

Optionally, after 305, the method may further include 306.

306. The macro base station 10 sends a scheduling indication message to the second small base station 20.

Specifically, after the macro base station 10 determines the second small base station 20, the scheduling indication information may be sent to the M second small base stations 20, so that the second small base station 20 that receives the scheduling indication message is in an active state, thereby being able to Data transfer. And the macro base station 10 can also allocate corresponding transmission resources for the M second small base stations 20 for the data transmission.

Optionally, after 306, the method may further include 307 and 308.

307. The macro base station 10 transmits data to the user equipment 30 through the second small base station 20.

308. The user equipment 30 transmits data to the macro base station 10 through the second small base station 20.

Specifically, when the macro base station 10 determines the second small base station 20 for data transmission, the macro base station 10 and the user equipment 30 can perform data transmission through the second small base station 20. Thus, each user equipment in the user equipment 30 can also perform data interaction through the macro base station 10 and the second small base station 20. The source user equipment may select a small base station as the intermediate destination node in the second small base station 20, and the source user equipment transmits data to the corresponding intermediate destination node through the high frequency channel, and then the small base station transmits the data to the macro base station. 10. After that, the macro base station 10 selects a small base station in the second small base station 20 to perform downlink downlink transmission link transmission data to the destination user equipment.

It should be understood that the size of the sequence numbers of the above-mentioned processes does not imply a sequence of executions, and the order of execution of the processes should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiments of the present application.

The method for data transmission in a wireless local area network WLAN according to an embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 4 . Hereinafter, a macro base station for transmitting data according to an embodiment of the present application and a detailed description will be described below with reference to FIG. 5 to FIG. 8 . User equipment.

FIG. 5 is a structural block diagram of a macro base station according to an embodiment of the present application. The macro base station 500 shown in FIG. 5 can be used to perform the various processes implemented by the macro base station 10 in the foregoing method embodiment of FIG. The macro base station 500 shown in FIG. 5 includes a receiving module first determining module 501, a second determining module 502, and a transmitting module 503.

The first determining module 501 is configured to determine an outage probability distribution of the communication link, where the communication link is a link between the user equipment UE and the first small base station, and the outage probability distribution indicates that the communication link is interrupted. The relationship between the probability and the number of UEs, the first small base station comprising a plurality of small base stations;

a second determining module 502, configured to determine, according to the outage probability distribution determined by the first determining module 501, a second small base station participating in the data transmission in the first small base station;

The transmitting module 503 is configured to perform, by using the second determining unit 502, the second small base station and the UE to perform the data transmission in a high frequency band.

As another embodiment, the transmission module 503 is specifically configured to:

Receiving, by the UE, interrupt information, where the interrupt information is used to indicate whether an interruption occurs in the communication link;

The first determining module 501 is specifically configured to: determine the outage probability distribution according to the interrupt information.

As another embodiment, the first determining module 501 is specifically configured to:

An interrupt probability distribution function for indicating the outage probability distribution is calculated based on the interrupt information.

And selecting, according to the interrupt information, an outage probability distribution function for indicating the outage probability distribution among a plurality of predefined outage probability distribution functions.

As another embodiment, the second determining module 502 is specifically configured to:

Determining, according to the outage probability distribution, the number of small base stations participating in the data transmission;

Selecting the number of small base stations in the first small base station, and determining the number of small base stations as the second small base station.

And determining, according to the outage probability distribution, the number of the UEs, and the number of radio linkes of the macro base station, the number of small base stations participating in the data transmission.

Further, the second determining module 502 is further configured to: determine, according to the outage probability distribution, the number of the UEs, and the number of radio linkes of the macro base station, the small base station participating in the data transmission. The number, such that the uplink access link capacity and the downlink backhaul link capacity are equal or approximately equal, the uplink access link capacity and the outage probability distribution, the number of UEs, and the participation in the data The number of small base stations transmitted is related, The downlink backhaul link capacity is related to the outage probability distribution, the number of radio linkes of the macro base station, and the number of small base stations participating in the data transmission.

And selecting, according to a physical location and/or a link state of the first small base station, the number of small base stations in the first small base station, and determining the number of small base stations as the second small base station.

As another embodiment, the macro base station 500 further includes a third determining module, where the third determining module is configured to:

After the second determining module 502 determines, according to the outage probability distribution, that the second small base station participating in the data transmission is determined in the first small base station, determining that the second small base station has a backhaul link Small base station;

The transmission module 503 is further configured to perform data transmission between the small base station having the backhaul link and the small base station not having the backhaul link, where the small base station without the backhaul link is The other small base stations other than the small base station having the backhaul link in the second small base station.

As another embodiment, the third determining module is specifically configured to:

Determining the small base station with the backhaul link in the second small base station according to the physical location and/or link status of the second small base station.

Receiving, by the cellular link between the macro base station 500 and the UE, the interrupt information sent by the UE in a low frequency band.

The macro base station in the embodiment of the present application determines an appropriate number of small base stations for communicating with the user equipment according to the interruption probability of the communication link, so that an optimal system capacity can be obtained in the presence of a communication link interruption.

FIG. 6 is a structural block diagram of a user equipment according to an embodiment of the present application. The user equipment 600 shown in FIG. 6 can be used to perform the various processes implemented by the user equipment 30 in the aforementioned method embodiment of FIG. The user equipment 600 shown in FIG. 6 includes a determination module 601 and a transmission module 602.

a determining module 601, configured to determine interrupt information, where the interrupt information is used to indicate whether an interruption occurs in a communication link, where the communication link is a communication link between the UE and the first small base station, the first small The base station includes a plurality of small base stations;

The transmission module 602 is configured to send, by the macro base station, the interruption information determined by the determining module 601, so that the macro base station determines, in the first small base station, the second participation in the data transmission according to the interruption information. Small base station

The transmission module 602 is further configured to perform the data transmission in the high frequency band by using the second small base station and the macro base station.

As another embodiment, the determining module 601 is specifically configured to:

Measuring a received power of the reference signal sent by the first small base station;

The interrupt information is determined according to a received power of the reference signal.

And if the difference between the received power of the reference signal in the current period and the received power of the reference signal in the previous period is greater than the interrupt threshold, determining that the interrupt information includes information indicating that the communication link is interrupted.

As another embodiment, the transmission module 602 is specifically configured to:

And transmitting, by the cellular link between the macro base station and the UE 600, the interrupt information to the macro base station in a low frequency band.

The user equipment in the embodiment of the present application detects the link interruption condition and feeds back the interruption information to the macro base station, so that the macro base station can determine an appropriate number of communications for communication with the user equipment according to the interruption probability of the communication link. Small base stations, thereby enabling optimal system capacity in the presence of communication link disruptions.

As shown in FIG. 7 , the embodiment of the present application further provides a macro base station, where the macro base station 700 and the user equipment perform the data transmission in a high frequency band through a second small base station, where the macro base station 700 includes a processor 710, a memory 720, a transceiver 730, and an antenna 740. The transceiver 730 can include a receiver 731 and a transmitter 732 for receiving signals and transmitting signals, respectively. The memory 720 is used to store instructions, the processor 710 is configured to execute instructions stored in the memory 720, and the transmitter 732 is controlled to transmit signals to control the receiver 731 to receive signals. The processor 710, the memory 720, and the transceiver 730 can be implemented by one or more chips. For example, processor 710, memory 720, and transceiver 730 may be fully integrated in one or more chips, or processor 710 and transceiver 730 may be integrated in one chip and memory 720 integrated in another chip, The form is not limited here. The macro base station 700 shown in FIG. 7 can be used to perform the various processes implemented by the macro base station 10 in the foregoing method embodiment of FIG. The processor 710 is configured to:

The transceiver 730 is configured to perform the data transmission by the second small base station and the UE determined by the processor 710 in a high frequency band.

As another embodiment, the transceiver 730 is specifically configured to:

The processor 710 is specifically configured to: determine the outage probability distribution according to the interrupt information.

As another embodiment, the processor 710 is specifically configured to:

Further, the processor 710 is further configured to: determine, according to the outage probability distribution, the number of the UEs, and the number of radio links of the macro base station, the number of small base stations participating in the data transmission. So that the uplink access link capacity and the downlink backhaul link capacity are equal or approximately equal, the uplink access link capacity and the outage probability distribution, the number of the UEs, and the participation in the data transmission. The number of small base stations is related to the outage probability distribution, the number of radio links of the macro base station, and the number of small base stations participating in the data transmission.

As another embodiment, the processor 710 is specifically configured to:

Selecting the number in the first small base station according to a physical location and/or a link state of the first small base station a small base station, and determining the number of small base stations as the second small base station.

As another embodiment, the macro base station 500 further includes a processor 710, where the processor 710 is configured to:

After the processor 710 determines, according to the outage probability distribution, that the second small base station participating in the data transmission is determined in the first small base station, determining that the second small base station has a small backhaul link Base station

The transceiver 730 is further configured to perform data transmission between the small base station having the backhaul link and the small base station not having the backhaul link, where the small base station without the backhaul link is Other small base stations other than the small base station having the backhaul link in the second small base station.

As another embodiment, the processor 710 is specifically configured to:

As another embodiment, the transceiver 730 is specifically configured to:

As shown in FIG. 8 , the embodiment of the present application further provides a user equipment, where the user equipment 800 and the macro base station perform the data transmission in a high frequency band through a second small base station, where the user equipment 800 includes processing. The 810, the memory 820, the transceiver 830, and the antenna 840. The transceiver 830 can include a receiver 831 and a transmitter 832 for receiving signals and transmitting signals, respectively. The memory 820 is used to store instructions, the processor 810 is used to execute the instructions stored in the memory 820, and the transmitter 832 is controlled to transmit signals to control the receiver 831 to receive signals. The processor 810, the memory 820, and the transceiver 830 can be implemented by one or more chips. For example, the processor 810, the memory 820, and the transceiver 830 may be fully integrated in one or more chips, or the processor 810 and the transceiver 830 may be integrated in one chip and the memory 820 integrated in another chip, specifically The form is not limited here. The user equipment 800 shown in FIG. 8 can be used to perform the various processes implemented by the user equipment 30 in the aforementioned method embodiment of FIG. The processor 810 is configured to:

Determining interrupt information, the interrupt information is used to indicate whether an interruption occurs in the communication link, the communication link is a communication link between the UE and the first small base station, and the first small base station includes multiple small base stations ;

The transceiver 830 is configured to send the interrupt information determined by the processor 810 to the macro base station, so that the macro base station determines, in the first small base station, to participate in the data transmission according to the interruption information. Two small base stations;

The transceiver 830 is further configured to perform the data transmission in the high frequency band by using the second small base station and the macro base station.

As another embodiment, the processor 810 is specifically configured to:

As another embodiment, the transceiver 830 is specifically configured to:

Transmitting the interrupt information to the macro base station in a low frequency band by using a cellular link between the UE 800 and the macro base station.

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

It should be understood that the terms "and/or" and "at least one of A or B" herein are merely an association describing the associated object, indicating that there may be three relationships, for example, A and/or B, Representation: There are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should also be understood that, in the embodiment of the present application, the processor may be a central processing unit (CPU), and the processor may also be other general-purpose processors, a digital signal processor (DSP), and a dedicated integration. Application Specific Integrated Circuit (ASIC), Field Programmable Gates Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.

Those skilled in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the steps and composition of the various embodiments have been generally described in terms of function in the foregoing description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. Different methods may be used to implement the described functionality for each particular application, but such implementation should not be considered to be beyond the scope of the application.

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

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

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

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

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any equivalents can be easily conceived by those skilled in the art within the technical scope disclosed in the present application. Modifications or substitutions are intended to be included within the scope of the present application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

A method of data transmission, characterized in that the method comprises:

The macro base station determines an outage probability distribution of the communication link, where the communication link is a link between the user equipment UE and the first small base station, and the outage probability distribution indicates a probability that the communication link is interrupted and the UE The relationship between the quantity, the first small base station includes a plurality of small base stations;

Determining, by the macro base station, a second small base station participating in the data transmission in the first small base station according to the outage probability distribution;

The macro base station performs the data transmission in the high frequency band by using the second small base station and the UE.
The method of claim 1, wherein the macro base station determines an outage probability distribution of the communication link, including:

The macro base station receives the interrupt information sent by the UE, and the interrupt information is used to indicate whether the communication link is interrupted;

The macro base station determines the outage probability distribution according to the interrupt information.
The method according to claim 2, wherein the macro base station determines the outage probability distribution according to the interrupt information, including:

The macro base station calculates an outage probability distribution function for indicating the outage probability distribution according to the interrupt information.
The method according to claim 2, wherein the macro base station determines the outage probability distribution according to the interrupt information, including:

The macro base station selects an outage probability distribution function for indicating the outage probability distribution among a plurality of predefined outage probability distribution functions according to the interrupt information.
The method according to any one of claims 1 to 4, wherein the macro base station determines, in the first small base station, a second small base station participating in the data transmission according to the outage probability distribution. include:

Determining, by the macro base station, the number of small base stations participating in the data transmission according to the outage probability distribution;

The macro base station selects the number of small base stations in the first small base station, and determines the number of small base stations as the second small base station.
The method according to claim 5, wherein the macro base station determines the number of small base stations participating in the data transmission according to the outage probability distribution, including:

The macro base station determines the number of small base stations participating in the data transmission according to the outage probability distribution, the number of the UEs, and the number of radio linkes of the macro base station.
The method according to claim 5 or 6, wherein the macro base station selects the number of small base stations among the first small base stations, and determines the number of small base stations as the second small Base station, including:

The macro base station selects the number of small base stations in the first small base station according to the physical location and/or link status of the first small base station, and determines the number of small base stations as the first Two small base stations.
The method according to any one of claims 1 to 7, wherein the macro base station determines, in the first small base station, a second small base station participating in the data transmission according to the outage probability distribution. Thereafter, the method further includes:

The macro base station determines, in the second small base station, a small base station having a backhaul link;

The macro base station performs data transmission between the small base station having the backhaul link and the small base station not having the backhaul link, and the small base station not having the backhaul link is the second small base station Small in addition to the return link Other small base stations other than the base station.
The method according to claim 8, wherein the macro base station determines, in the second small base station, a small base station having a backhaul link, including:

The macro base station determines the small base station with the backhaul link in the second small base station according to the physical location and/or the link state of the second small base station.
The method according to any one of claims 2 to 4, wherein the macro base station receives the interrupt information sent by the UE, including:

The macro base station receives the interrupt information sent by the UE in a low frequency band by using a cellular link between the macro base station and the UE.
A method of data transmission, characterized in that the method comprises:

The user equipment UE determines the interruption information, the interruption information is used to indicate whether the communication link is interrupted, the communication link is a communication link between the UE and the first small base station, and the first small base station includes multiple Small base stations;

Transmitting, by the UE, the interruption information to the macro base station, so that the macro base station determines, in the first small base station, the second small base station participating in the data transmission according to the interruption information;

The UE performs the data transmission in a high frequency band by using the second small base station and the macro base station.
The method of claim 11, wherein the determining, by the UE, the interrupt information comprises:

The UE measures a received power of a reference signal sent by the first small base station;

The UE determines the interrupt information according to a received power of the reference signal.
The method according to claim 12, wherein the determining, by the UE, the interrupt information according to the received power of the reference signal comprises:

If the difference between the received power of the reference signal in the current period and the received power of the reference signal in the previous period is greater than the interruption threshold, the determining, by the UE, that the interruption information includes indicating that the communication link is interrupted Information.
The method according to any one of claims 11 to 13, wherein the sending, by the UE, the interrupt information to the macro base station comprises:

The UE sends the interrupt information to the macro base station in a low frequency band by using a cellular link between the macro base station and the UE.
A macro base station, characterized in that the macro base station comprises:

a first determining module, configured to determine an outage probability distribution of the communication link, where the communication link is a link between the user equipment UE and the first small base station, where the outage probability distribution indicates that the communication link is interrupted a relationship between a probability and a quantity of the UE, the first small base station comprising a plurality of small base stations;

a second determining module, configured to determine, according to the outage probability distribution determined by the first determining module, a second small base station participating in the data transmission in the first small base station;

a transmitting module, configured to perform, by the second small base station determined by the second determining module, the data transmission in the high frequency band with the UE.
The macro base station according to claim 15, wherein the transmission module is specifically configured to:

Receiving, by the UE, interrupt information, where the interrupt information is used to indicate whether an interruption occurs in the communication link;

The first determining module is specifically configured to: determine the outage probability distribution according to the interrupt information.
The macro base station according to claim 16, wherein the first determining module is specifically configured to:

An interrupt probability distribution function for indicating the outage probability distribution is calculated based on the interrupt information.
The macro base station according to claim 16, wherein the first determining module is specifically configured to:

And selecting, according to the interrupt information, an outage probability distribution function for indicating the outage probability distribution among a plurality of predefined outage probability distribution functions.
The macro base station according to any one of claims 15 to 18, wherein the second determining module is specifically configured to:

Determining, according to the outage probability distribution, the number of small base stations participating in the data transmission;

Selecting the number of small base stations in the first small base station, and determining the number of small base stations as the second small base station.
The macro base station according to claim 19, wherein the second determining module is specifically configured to:

And determining, according to the outage probability distribution, the number of the UEs, and the number of radio linkes of the macro base station, the number of small base stations participating in the data transmission.
The macro base station according to claim 19 or 20, wherein the second determining module is specifically configured to:

And selecting, according to a physical location and/or a link state of the first small base station, the number of small base stations in the first small base station, and determining the number of small base stations as the second small base station.
The macro base station according to any one of claims 15 to 21, wherein the macro base station further comprises a third determining module, the third determining module is configured to:

After the second determining module determines, according to the outage probability distribution, that the second small base station participating in the data transmission is determined in the first small base station, determining that the second small base station has a backhaul link Small base station

The transmission module is further configured to perform data transmission between the small base station having the backhaul link and the small base station not having the backhaul link, where the small base station without the backhaul link is the Other small base stations other than the small base station having the backhaul link in the second small base station.
The macro base station according to claim 22, wherein the third determining module is specifically configured to:

Determining the small base station with the backhaul link in the second small base station according to the physical location and/or link status of the second small base station.
The macro base station according to any one of claims 16 to 18, wherein the transmission module is specifically configured to:

Receiving, by the cellular link between the macro base station and the UE, the interrupt information sent by the UE in a low frequency band.
A user equipment (UE), the user equipment includes:

a determining module, configured to determine interrupt information, where the interrupt information is used to indicate whether an interruption occurs in a communication link, where the communication link is a communication link between the UE and a first small base station, the first small base station Including a plurality of small base stations;

a transmission module, configured to send, to the macro base station, the interruption information determined by the determining module, so that the macro base station determines, in the first small base station, the second small base station participating in the data transmission according to the interruption information. ;

The transmission module is further configured to perform the data transmission in the high frequency band by using the second small base station and the macro base station.
The user equipment of claim 25, wherein the determining module is specifically configured to:

Measuring a received power of the reference signal sent by the first small base station;

The interrupt information is determined according to a received power of the reference signal.
The user equipment of claim 26, wherein the determining module is specifically configured to:

If the received power of the reference signal in the current period is received from the reference signal in the previous period The difference in power is greater than the interrupt threshold, and the determining the interrupt information includes information indicating that the communication link is interrupted.
The user equipment according to any one of claims 25 to 27, wherein the transmission module is specifically configured to:

And transmitting, by the cellular link between the macro base station and the UE, the interrupt information to the macro base station in a low frequency band.