A method and apparatus for distributing heterogeneous signal single-frequency network overlay services

Abstract

The present invention discloses a method and apparatus for heterogeneous signal single-frequency network superposition service distribution, including a hybrid service gateway module, a wide-area large tower base station supporting adaptive transmission, a cell small tower base station supporting adaptive transmission, and a reference access user. The hybrid service gateway performs signaling interaction with the reference access user through the cell small tower base station to obtain relevant information of the reference access user. The hybrid service gateway uses the comprehensive revenue of the superposition channel spectrum as a measurement index, and combines the obtained reference access user information to optimize the superposition channel parameters, including power parameters, superposition channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters. Thanks to the two-way interaction ability of the reference access user, the hybrid service gateway can adaptively adjust the superposition channel parameters. The present invention can integrate large and small tower infrastructures, provide deep coverage of broadcast services for handheld terminals, and provide a variety of value-added services.

Description

Technical Field

[0001] The present invention relates to the technical field of digital information transmission, and particularly to a method and apparatus for distributing heterogeneous signal single-frequency network overlay services. Background Art

[0002] With the commercialization of the fifth-generation mobile communication technology (5G), and the access of a large number of mobile terminals to the network, the demand for multimedia data services of intelligent mobile terminals by the public has shown explosive growth. At the same time, how to quickly and efficiently spread public information in rapidly popular handheld terminals to strengthen the mainstream public opinion also poses a huge challenge to the traditional 5G cellular network mainly based on unicast.

[0003] Traditional digital television broadcast transmission systems usually use high-site transmission base stations to provide wide-area broadcast high-power signal coverage, usually targeting terminal devices such as rooftop antennas with high antenna gain and good reception conditions. In a mobile communication network, however, receiving terminals not only have complex types, but also have characteristics such as strong device mobility, complex and diverse receiving environments, poor receiving conditions, and low receiving antenna gain. Therefore, it is difficult to achieve deep coverage of broadcast signals for handheld terminals with a wide-area broadcast network constructed only by large towers (or satellites) of traditional digital terrestrial broadcast transmission systems.

[0004] Since its early days, 3GPP has been trying to introduce multicast / broadcast capabilities into cellular networks in the standardization process, although it has not been widely used in commercial networks. 3GPP has defined two different multicast modes, namely Multimedia / Broadcast Single Frequency Network (MBSFN) and SingleCell-Point To Multipoint (SC-PTM). In fact, the MBSFN and SC-PTM schemes adopt quite different technologies, which endow them with corresponding advantages and disadvantages. The time synchronization guaranteed by MBSFN enables all cells in the network to transmit the same signal waveform simultaneously. For the receiver, these signals from different cells constitute multipath signals. However, the modulation coding scheme (MCS) for multicast transmission is determined by the user with the worst received signal quality across the entire network. This prevents users with better received signal quality from obtaining better services. SC-PTM does not require time synchronization, reducing the operating cost. Each cell only serves a cluster of users within the cell, ensuring the flexibility of service and MCS selection. However, when a large number of users are located at the cell edge, SC-PTM may be severely interfered with by other cells. Therefore, neither MBSFN nor SC-PTM can meet the demand for deep coverage of broadcast services for handheld terminals. In response to the broadcast requirements in mobile communications, an organization promoting the evolution of the European 5G broadcast standard has proposed a hybrid network consisting of high-power large towers and medium-power medium towers, but the additional medium-power medium towers constructed are a serious waste of resources.

[0005] Terminal devices with excellent reception conditions such as traditional rooftop antennas require high-quality video service, while the rapid growth in the number of handheld terminals has exacerbated the development demand for multimedia services with wide coverage and low cost. Due to the limitation of orthogonality, the limited time-frequency resources of traditional Orthogonal Multiple Access (OMA) schemes cannot meet the diverse requirements of future mobile communication systems.

[0006] Therefore, the existing technologies need to be improved and perfected. Summary of the Invention

[0007] The main objective of the present invention is to provide a method and device for heterogeneous signal single-frequency network overlay service distribution, aiming to solve the problems in the prior art that it is difficult to achieve deep coverage of broadcast signals for handheld terminals and unable to meet diverse communication service requirements with a wide-area broadcast network constructed by large towers (or satellites) of traditional digital terrestrial broadcast transmission systems.

[0008] To achieve the above object, the present invention provides a method for distributing heterogeneous signal single-frequency network overlay services, and the method for distributing heterogeneous signal single-frequency network overlay services includes the following steps:

[0009] The hybrid service gateway at the core network adaptively adjusts the overlay channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, overlay channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters;

[0010] The wide-area large tower base station obtains the wide-area large tower overlay channel information, configures and adjusts the wide-area large tower overlay channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the large tower overlay channel signal, and further obtains the wide-area large tower physical layer channel signal, which is transmitted through the wide-area large tower base station;

[0011] The small cell tower base station obtains the small cell tower overlay channel information, configures and adjusts the small cell tower overlay channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the small tower overlay channel signal, and further obtains the small cell tower physical layer channel signal, which is sent through the small cell tower base station;

[0012] The reference access user receives the basic layer sub-channel signal carrying the basic layer broadcast service data or the enhanced layer sub-channel signal carrying the enhanced layer service data, and demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data or enhanced layer service data.

[0013] Optionally, in the method for distributing heterogeneous signal single-frequency network overlay services, the hybrid service gateway at the core network adaptively adjusts the overlay channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, overlay channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters, specifically including:

[0014] The hybrid service gateway at the core network performs signaling interaction with the reference access user through the small cell tower base station to obtain the current information and historical information of the cell location, required basic layer broadcast service, required enhanced layer service, and reception conditions of the reference access user, uses the comprehensive benefit of the overlay channel spectrum as a measurement index, and combines the obtained reference access user information to optimize the overlay channel parameters, where the overlay channel parameters include power parameters, overlay channel frame structure parameters, and basic layer sub-channel parameters;

[0015] After the hybrid service gateway optimizes the overlay channel parameters, using the current comprehensive benefit of the enhanced layer sub-channel spectrum as a measurement index, and combining the current reference access user information of the current enhanced layer service, it optimizes the current enhanced layer sub-channel parameters, where the comprehensive benefit of the enhanced layer sub-channel spectrum refers to the product of the expected number of access users in the enhanced layer, spectral efficiency, and the corresponding service weight;

[0016] The hybrid service gateway performs signaling interaction with the reference access user through the small cell tower base station, obtains relevant information of the reference access user, uses the comprehensive benefit of the superimposed channel spectrum as a measurement index, and combines the reference access user information to adaptively adjust the superimposed channel parameters of the wide area large tower base station and the small cell tower base station, including power parameters, superimposed channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters.

[0017] Optionally, in the heterogeneous signal single-frequency network superimposed service distribution method, the basic layer sub-channel includes a wide area large tower basic layer sub-channel and a small cell tower basic layer sub-channel; the enhanced layer sub-channel is a wide area large tower enhanced layer sub-channel or a small cell tower enhanced layer sub-channel.

[0018] Optionally, in the heterogeneous signal single-frequency network superimposed service distribution method, the wide area large tower base station obtains wide area large tower superimposed channel information, configures and adjusts the wide area large tower superimposed channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the large tower superimposed channel signal, and then obtains the wide area large tower physical layer channel signal, which is transmitted through the wide area large tower base station. Specifically, it includes:

[0019] The wide area large tower base station obtains wide area large tower superimposed channel information according to the fixed configuration of the wide area large tower, or performs signaling interaction with the hybrid service gateway and obtains wide area large tower superimposed channel information according to the control data received from the hybrid service gateway;

[0020] The wide area large tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the wide area large tower superimposed channel, receives the basic layer and large tower enhanced layer service data sent by the hybrid service gateway, performs transmit-end coding and modulation processing on the basic layer and large tower enhanced layer service data according to the wide area large tower transmission protocol to obtain the basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the large tower superimposed channel signal, and then obtains the wide area large tower physical layer channel signal, which is transmitted through the wide area large tower base station.

[0021] Optionally, in the heterogeneous signal single-frequency network superimposed service distribution method, the small cell tower base station obtains small cell tower superimposed channel information, configures and adjusts the small cell tower superimposed channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the small tower superimposed channel signal, and then obtains the small cell tower physical layer channel signal, which is transmitted through the small cell tower base station. Specifically, it includes:

[0022] The small cell tower base station obtains the small cell tower superposition channel information according to the fixed configuration of the small cell tower, or performs signaling interaction with the hybrid service gateway, and obtains the small cell tower superposition channel information according to the control data received from the hybrid service gateway;

[0023] The small cell tower receives the control data sent by the hybrid service gateway, configures and adjusts the small cell tower superposition channel, receives the basic layer and small cell tower enhanced layer service data sent by the hybrid service gateway, and performs transmit - end encoding and modulation processing on the basic layer service data and the small cell tower enhanced layer service data according to the small cell tower transmission protocol, to obtain the basic layer sub - channel broadcast signal and the enhanced layer sub - channel broadcast, multicast or unicast signal, superimpose the basic layer sub - channel signal and the enhanced layer sub - channel broadcast, multicast or unicast signal to obtain the small tower superposition channel signal, and further obtain the small cell tower physical layer channel signal, which is sent through the small cell tower base station.

[0024] Optionally, in the heterogeneous signal single - frequency network superposition service distribution method, the power parameter, frame structure parameter, and basic layer sub - channel parameter of the large tower superposition channel and the small tower superposition channel are the same, and the wide - area large tower basic layer sub - channel signal and the small cell tower basic layer sub - channel signal form a single - frequency network transmission.

[0025] Optionally, in the heterogeneous signal single - frequency network superposition service distribution method, the reference access user receives the basic layer sub - channel signal carrying the basic layer broadcast service data or the enhanced layer sub - channel signal carrying the enhanced layer service data, and demodulates and decodes the received basic layer sub - channel signal or enhanced layer sub - channel signal to obtain the basic layer broadcast service data or enhanced layer service data to be received. Specifically, it includes:

[0026] The reference access user performs signaling interaction with the hybrid service gateway through the small cell tower base station, and the hybrid service gateway obtains the current information and historical information of the cell location, required basic layer broadcast service, required enhanced layer service, and terminal reception conditions of the reference access user;

[0027] The hybrid service gateway decides whether the reference access user can access the basic layer broadcast service according to the basic layer sub - channel configuration and the obtained reference access user information. If access is allowed, it sends control data to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the basic layer sub - channel signal carrying the basic layer broadcast service data;

[0028] The hybrid service gateway decides whether the reference access user can access the enhanced layer service according to the enhanced layer sub - channel configuration and the obtained reference access user information. If access is allowed, it sends control data to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the enhanced layer sub - channel signal carrying the enhanced layer service data;

[0029] The reference access user receives the control data sent by the hybrid service gateway, and receives the basic layer sub-channel signal carrying the basic layer broadcast service data or the enhanced layer sub-channel signal carrying the enhanced layer service data;

[0030] The reference access user demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data or enhanced layer service data.

[0031] Optionally, in the heterogeneous signal single-frequency network overlay service distribution method, the enhanced layer sub-channel signal is a large tower enhanced layer sub-channel signal or a small tower enhanced layer sub-channel signal.

[0032] Optionally, in the heterogeneous signal single-frequency network overlay service distribution method, the overlay channel spectrum comprehensive benefit is the sum of the average expected spectrum benefit of the basic layer sub-channel and the average empirical spectrum benefit of all enhanced layer sub-channels.

[0033] Optionally, in the heterogeneous signal single-frequency network overlay service distribution method, the one-way control, interactive signaling, and overlay service data from a hybrid service gateway to a wide-area large tower base station and a small cell tower base station are connected through the optical fiber and / or fixed wireless channel of the core network, or are connected through satellite relay forwarding.

[0034] Optionally, in the heterogeneous signal single-frequency network overlay service distribution method, a hybrid service gateway interacts with one or more wide-area large tower base stations;

[0035] A hybrid service gateway interacts with one or more small cell tower base stations;

[0036] A hybrid service gateway supports one or more broadcast services, or supports multiple hybrid services.

[0037] In addition, to achieve the above object, the present invention further provides a heterogeneous signal single-frequency network overlay service distribution device, where the heterogeneous signal single-frequency network overlay service distribution device includes:

[0038] A hybrid service gateway, a wide-area large tower base station, a small cell tower base station, and a reference access user;

[0039] The hybrid service gateway performs control and signaling interaction with the wide-area large tower base station, the small cell tower base station, and the reference access user;

[0040] The hybrid service gateway sends control data to the wide-area large tower base station, configures and adjusts the wide-area large tower superimposed channel, and sends the basic layer and large tower enhanced layer service data to the wide-area large tower base station. The wide-area large tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the wide-area large tower basic layer sub-channel and enhanced layer sub-channel, receives the basic layer and large tower enhanced layer service data sent by the hybrid service gateway, and performs transmit-end encoding and modulation processing on the service data according to the wide-area large tower transmission protocol to obtain the large tower basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast or unicast signal, superimposes them to obtain the large tower superimposed channel signal, and further obtains the wide-area large tower physical layer channel signal, which is transmitted through the wide-area large tower base station;

[0041] The hybrid service gateway sends control data to the small cell tower base station, configures and adjusts the small cell tower superimposed channel, and sends the basic layer and small tower enhanced layer service data to the small cell tower base station. The small cell tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the small cell tower basic layer sub-channel and enhanced layer sub-channel, receives the basic layer and small tower enhanced layer service data sent by the hybrid service gateway, and performs transmit-end encoding and modulation processing on the service data according to the small cell tower transmission protocol to obtain the small tower basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast or unicast signal, superimposes them to obtain the small tower superimposed channel signal, and obtains the small cell tower physical layer channel signal, which is transmitted through the small cell tower base station;

[0042] The hybrid service gateway performs signaling interaction with the reference access user through the small cell tower base station, and the hybrid service gateway obtains the current information and historical information of the cell location, required basic layer broadcast service, required enhanced layer service, and terminal reception conditions of the reference access user;

[0043] Based on the basic layer sub-channel configuration and the obtained reference access user information, the hybrid service gateway determines whether the reference access user can access the basic layer broadcast service. If access is allowed, control data is sent to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the basic layer sub-channel signal carrying the basic layer broadcast service data;

[0044] Based on the enhanced layer sub-channel configuration and the obtained reference access user information, the hybrid service gateway determines whether the reference access user can access the enhanced layer service. If access is allowed, control data is sent to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the enhanced layer sub-channel signal carrying the enhanced layer service data;

[0045] The reference access user receives the control data sent by the hybrid service gateway, or receives the basic layer sub-channel signal carrying the basic layer broadcast service data, or receives the enhanced layer sub-channel signal carrying the enhanced layer service data, where the enhanced layer sub-channel signal is a large tower enhanced layer sub-channel signal or a small tower enhanced layer sub-channel signal; the reference access user demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data and enhanced layer service data.

[0046] The present invention combines the wide-area broadcast large tower base station and the cell small tower base station to construct a network system architecture that serves mobile phone terminals and provides various value-added services, including a hybrid service gateway module, a wide-area large tower base station supporting adaptive transmission, a cell small tower base station supporting adaptive transmission, and a reference access user. The hybrid service gateway performs signaling interaction with the reference access user through the cell small tower base station to obtain relevant information of the reference access user. The hybrid service gateway uses the comprehensive revenue of the superimposed channel spectrum as a measurement index, combines the obtained reference access user information, and optimizes the superimposed channel parameters, including power parameters, superimposed channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters. Thanks to the two-way interaction ability of the reference access user, the hybrid service gateway can adaptively adjust the superimposed channel parameters. The present invention uses the physical layer basic layer sub-channel signals of the wide-area large tower base station and the cell small tower base station to form a heterogeneous signal single-frequency network, improves the coverage ability of the basic layer broadcast service, and better serves mobile phone terminals. On the physical layer basic layer sub-channel of the wide-area large tower base station and the cell small tower base station, a physical layer enhanced layer sub-channel is superimposed to form a superimposed channel, which meets the complex and diverse value-added service requirements and improves the transmission efficiency of the physical layer channel. Brief Description of the Drawings

[0047] Figure 1 is a flowchart of a preferred embodiment of the heterogeneous signal single-frequency network superimposed service distribution method of the present invention;

[0048] Figure 2 is a schematic diagram of the principle of a preferred embodiment of the heterogeneous signal single-frequency network superimposed service distribution device of the present invention;

[0049] Figure 3 is a schematic diagram of the signal coverage ranges of the wide-area large tower base station and the cell small tower base station within the hybrid service range. Detailed Embodiments

[0050] To make the objectives, technical solutions, and advantages of the present invention clearer and more definite, the following further describes the present invention in detail with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] The technical solution of Non-Orthogonal Multiple Access (NOMA) breaks through the orthogonal condition, superimposes multiple service information on the same time-frequency resource for non-orthogonal transmission, and improves the utilization rate of channel resources. In order to achieve deep coverage of broadcast services for handheld terminals and meet diverse communication services, the present invention considers combining the wide-area broadcast large tower base stations and small cell tower base stations in the target area to form a heterogeneous network of large and small towers, and uses the existing ground broadcast large tower resources and small cell base station resources to provide broadcast services for mobile phone terminals, while providing a variety of value-added services suitable for large tower transmission and small tower transmission. Among them, the physical layer sub-channels divided orthogonally in time-frequency of all towers are further divided into physical layer basic layer sub-channels (abbreviation: basic layer sub-channels) and physical layer enhanced layer sub-channels (abbreviation: enhanced layer sub-channels). In the present invention, the physical layer sub-channel formed by superimposing the basic layer sub-channel and the enhanced layer sub-channel is simply referred to as the "superimposed channel". The basic layer sub-channels of all towers transmit the same broadcast signal and form a heterogeneous signal single-frequency network, maintaining the advantages of the MBSFN technology. One type of service can be supported by a basic layer or enhanced layer sub-channel. The enhanced layer sub-channels of each wide-area broadcast large tower base station can provide value-added services for enterprise terminal users or ordinary users with good reception conditions such as ten-meter-high antennas, and can transmit broadcast, multicast or unicast signals; the enhanced layer sub-channels of each small cell tower base station can transmit broadcast, multicast or unicast signals, and are targeted at users with better reception conditions in the cell, maintaining the advantages of the SC-PTM technology. For the heterogeneous network of large and small towers, the present invention proposes an optimization goal of maximizing the comprehensive spectrum benefit of the superimposed channel, and uses this as a measurement index to optimize the power allocation of the transmitted signals of the superimposed channels of each tower and the system parameters.

[0052] First, the relevant terms or technical terms appearing in the present invention are defined and described as follows:

[0053] Superimposed channel: The physical layer channel is orthogonally divided in time-frequency resources to obtain an orthogonally divided physical layer sub-channel, which is called a superimposed channel. The superimposed channel is further divided to obtain a first physical layer sub-channel and a second physical layer sub-channel. Among them, the first physical layer sub-channel is defined as the basic layer sub-channel for transmitting the basic layer broadcast signal, and the second physical layer sub-channel is defined as the enhanced layer sub-channel for transmitting enhanced layer broadcast, multicast or unicast signals. The superimposition of the basic layer sub-channel signal and the enhanced layer sub-channel signal can be direct superimposition or non-linear superimposition.

[0054] Basic layer sub-channel: Under the signaling control of the hybrid service gateway, the same basic layer broadcast signal is transmitted in the basic layer sub-channels of the wide-area large tower base station and the small cell tower base station, and forms a single-frequency network transmission to improve the deep coverage of broadcast services for handheld terminals.

[0055] Enhanced layer sub-channel: Under the signaling control of the hybrid service gateway, the enhanced layer sub-channels of the wide-area large tower base station or the small cell tower base station can transmit their respective enhanced layer broadcast, multicast or unicast signals, providing value-added services for reference access users with interactive capabilities and meeting the enhanced layer service access conditions.

[0056] Hybrid service gateway: A functional module located within the core network, used to support hybrid services composed of basic layer broadcast services and enhanced layer services. The hybrid service gateway conducts control and signaling interactions with wide-area large tower base stations, small cell tower base stations, and reference access users. The hybrid service gateway takes the comprehensive spectrum revenue of the superimposed channel as a measurement index, and combines the reference access user information to optimize the superimposed channel parameters, including power parameters, superimposed channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters. The hybrid service gateway can be a virtual gateway or a physical gateway. The hybrid service gateway is located within the core network and has the capabilities of edge computing, storage, service adaptation, and resource scheduling. Among them, the hybrid service gateway provides basic layer broadcast transmission of wide-area large tower base stations and small cell tower base stations for basic layer broadcast services, and provides enhanced layer broadcast, multicast or unicast transmission of wide-area large tower base stations or small cell tower base stations for enhanced layer services.

[0057] Reference access user: A user who accesses the basic layer broadcast service or the enhanced layer service is called a reference access user. The reference access user conducts signaling interactions with the hybrid service gateway through the small cell tower base station. The reference access user receives the control data sent by the hybrid service gateway, and receives the basic layer sub-channel signal carrying the basic layer service data or the enhanced layer sub-channel signal carrying the enhanced layer service data. Among them, the enhanced layer sub-channel signal is either a large tower enhanced layer sub-channel signal or a small tower enhanced layer sub-channel signal.

[0058] Comprehensive spectrum revenue of the superimposed channel: The sum of the average expected spectrum revenue of the basic layer sub-channel and the average empirical spectrum revenue of all enhanced layer sub-channels is selected as the comprehensive spectrum revenue of the superimposed channel. Among them, the average expected spectrum revenue of the basic layer sub-channel is the product of the average expected number of access users of the basic layer service, the spectrum efficiency of the basic layer sub-channel, and the service weight; among them, the average empirical spectrum revenue of each enhanced layer sub-channel is the product of the average historical empirical value of the number of access users of the enhanced layer service, the spectrum efficiency of this enhanced layer, and the corresponding service weight; among them, the basic layer sub-channel includes the wide-area large tower basic layer sub-channel and the small cell tower basic layer sub-channel, and the enhanced layer sub-channel is either a wide-area large tower enhanced layer sub-channel or a small cell tower enhanced layer sub-channel.

[0059] Terminal receiving conditions: The terminal receiving conditions are related to physical layer channel parameters and terminal parameters, and are independent of the required access services. The information included in the terminal receiving conditions are the azimuth of the reference access user terminal, the received reference signal level, antenna height and gain, base noise spectral density, mobile speed, etc. The hybrid service gateway obtains the above information through signaling interaction with the reference access user, which is used to calculate the average mutual information of the basic layer or enhanced layer subchannels. Combining historical data and channel parameters, the success probability of the reference access user receiving the target data service carried by the basic layer or enhanced layer subchannels can be estimated.

[0060] Terminal access conditions: The conditions for the reference access user terminal to access a certain service are related to the transmission parameters and reception parameters of the basic layer or enhanced layer subchannels where the service is located, such as coding and modulation mode, time-frequency selectivity. For the present invention, for the reference access user terminal, its basic layer service access conditions are related to the basic layer subchannel configuration and terminal receiving conditions, and its enhanced layer service access conditions are related to the enhanced layer subchannel configuration and terminal receiving conditions.

[0061] The heterogeneous signal single-frequency network overlay service distribution method according to a preferred embodiment of the present invention, as Figure 1 shown, the heterogeneous signal single-frequency network overlay service distribution method includes the following steps:

[0062] Step A: The hybrid service gateway at the core network adaptively adjusts the overlay channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, overlay channel frame structure parameters, basic layer subchannel parameters, and enhanced layer subchannel parameters.

[0063] Specifically, step A specifically includes:

[0064] Step A1: The hybrid service gateway at the core network conducts signaling interaction with the reference access user through the small cell tower base station to obtain the current information and historical information of the reference access user, such as cell location, required basic layer broadcast service, required enhanced layer service, receiving conditions, etc. Using the comprehensive spectrum benefit of the overlay channel as a measurement index, and combining the obtained reference access user information, the overlay channel parameters are optimized, where the overlay channel parameters include power parameters, overlay channel frame structure parameters, and basic layer subchannel parameters (where the basic layer subchannels include wide-area large tower basic layer subchannels and small cell tower basic layer subchannels);

[0065] Step A2. After the hybrid service gateway optimizes the superposition channel parameters, including power parameters, superposition channel frame structure parameters, and basic layer sub-channel parameters, further, the hybrid service gateway optimizes the parameters of each enhanced layer sub-channel (where the enhanced layer sub-channel is a wide-area large tower enhanced layer sub-channel or a small cell tower enhanced layer sub-channel); the specific steps include: The hybrid service gateway uses the current comprehensive spectrum revenue of the enhanced layer sub-channel as a measurement index, and combines the current reference access user information of the current enhanced layer service to optimize the parameters of the current enhanced layer sub-channel, where the comprehensive spectrum revenue of the enhanced layer sub-channel refers to the product of the expected number of access users in the enhanced layer, spectral efficiency, and the corresponding service weight.

[0066] Step A3. The hybrid service gateway located at the core network performs signaling interaction with the reference access user through the small cell tower base station, obtains the relevant information of the reference access user, and uses the comprehensive spectrum revenue of the superposition channel as a measurement index. Combining the reference access user information, the hybrid service gateway adaptively adjusts the superposition channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, superposition channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters.

[0067] Step B. The wide-area large tower base station obtains the wide-area large tower superposition channel information, configures and adjusts the wide-area large tower superposition channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the large tower superposition channel signal, and then obtains the wide-area large tower physical layer channel signal, which is transmitted through the wide-area large tower base station.

[0068] Specifically, the step B specifically includes:

[0069] Step B1. The wide-area large tower base station obtains the wide-area large tower superposition channel information according to the fixed configuration of the wide-area large tower, or performs signaling interaction with the hybrid service gateway and obtains the wide-area large tower superposition channel information according to the control data received from the hybrid service gateway.

[0070] Step B2. The wide-area large tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the wide-area large tower superposition channel, receives the basic layer and large tower enhanced layer service data sent by the hybrid service gateway, and performs processing such as transmit-end encoding and modulation on the basic layer and large tower enhanced layer service data according to the wide-area large tower transmission protocol to obtain the basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal. The basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal are superimposed to obtain the large tower superposition channel signal, and then the wide-area large tower physical layer channel signal is obtained and transmitted through the wide-area large tower base station.

[0071] Step C: The small cell tower base station obtains the small cell tower superposition channel information, configures and adjusts the small cell tower superposition channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast or unicast signal to obtain the small tower superposition channel signal, and further obtains the small cell tower physical layer channel signal, which is then sent through the small cell tower base station.

[0072] Specifically, step C specifically includes:

[0073] Step C1: The small cell tower base station obtains the small cell tower superposition channel information according to the fixed configuration of the small cell tower, or performs signaling interaction with the hybrid service gateway and obtains the small cell tower superposition channel information according to the control data received from the hybrid service gateway.

[0074] Step C2: The small cell tower receives the control data sent by the hybrid service gateway, configures and adjusts the small cell tower superposition channel, receives the basic layer and small cell tower enhanced layer service data sent by the hybrid service gateway, and performs processing such as transmit - end coding and modulation on the basic layer service data and the small cell tower enhanced layer service data according to the small cell tower transmission protocol to obtain the basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast or unicast signal. The basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast or unicast signal are superimposed to obtain the small tower superposition channel signal, and further obtain the small cell tower physical layer channel signal, which is sent through the small cell tower base station.

[0075] Among them, the power parameter, frame structure parameter, and basic layer sub-channel parameter of the large tower superposition channel and the small tower superposition channel are the same, and the wide - area large tower basic layer sub-channel signal and the small cell tower basic layer sub-channel signal form a single - frequency network transmission.

[0076] Step D: The reference access user receives the basic layer sub-channel signal carrying the basic layer broadcast service data or the enhanced layer sub-channel signal carrying the enhanced layer service data, and demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to - be - received basic layer broadcast service data or enhanced layer service data.

[0077] Specifically, step D specifically includes:

[0078] Step D1: The reference access user performs signaling interaction with the hybrid service gateway through the small cell tower base station. The hybrid service gateway obtains the current information and historical information such as the cell location of the reference access user, the required basic layer broadcast service, the required enhanced layer service, and the terminal reception condition.

[0079] Step D2: The hybrid service gateway determines whether the reference access user can access the basic layer broadcast service based on the basic layer sub-channel configuration and the obtained reference access user information. If access is allowed, control data is sent to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the basic layer sub-channel signal carrying the basic layer broadcast service data;

[0080] Step D3: The hybrid service gateway determines whether the reference access user can access the enhanced layer service based on the enhanced layer sub-channel configuration and the obtained reference access user information. If access is allowed, control data is sent to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the enhanced layer sub-channel signal carrying the enhanced layer service data;

[0081] Step D4: The reference access user receives the control data sent by the hybrid service gateway and receives the basic layer sub-channel signal carrying the basic layer broadcast service data or the enhanced layer sub-channel signal carrying the enhanced layer service data; wherein, the enhanced layer sub-channel signal is a large tower enhanced layer sub-channel signal or a small tower enhanced layer sub-channel signal;

[0082] Step D5: The reference access user demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data or enhanced layer service data.

[0083] In the present invention, the hybrid service gateway performs signaling interaction with the reference access user through the small cell base station of the cell to obtain relevant information of the reference access user. The hybrid service gateway uses the comprehensive revenue of the superimposed channel spectrum as a measurement index, combines the obtained reference access user information, and optimizes the superimposed channel parameters, including power parameters, superimposed channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters. Thanks to the two-way interaction ability of the reference access user, the hybrid service gateway can adaptively adjust the superimposed channel parameters. The method of the present invention can integrate the large and small tower infrastructures, provide deep coverage of broadcast services for handheld terminals, and provide a variety of value-added services.

[0084] The present invention considers integrating the wide-area large tower base station and the small cell base station of the cell to construct a network system architecture that serves mobile phone terminals and provides a variety of value-added services. On the one hand, a heterogeneous signal single-frequency network is formed by using the physical layer basic layer sub-channel signals of the wide-area large tower base station and the small cell base station of the cell to improve the coverage ability of the basic layer broadcast service and better serve mobile phone terminals; on the other hand, by using non-orthogonal multiplexing technology, a physical layer enhanced layer sub-channel is superimposed on the physical layer basic layer sub-channel of the wide-area large tower base station or the small cell base station of the cell to form a superimposed channel, which meets the complex and diverse value-added service requirements and improves the transmission efficiency of the physical layer channel.

[0085] Such as Figure 2As shown in the figure, the heterogeneous signal single-frequency network superposition service distribution device includes: a hybrid service gateway module, a wide-area large tower base station supporting adaptive transmission, a cell small tower base station supporting adaptive transmission, and a reference access user.

[0086] Among them, the hybrid service gateway at the core network directly conducts control, signaling, and data interactions with the wide-area large tower base station and the cell small tower base station, and indirectly conducts control and signaling interactions with the reference access user through the cell small tower base station.

[0087] The hybrid service gateway conducts signaling interactions with the reference access user through the cell small tower base station to obtain relevant information of the reference access user. According to the obtained relevant information, it provides basic layer broadcast transmission of the wide-area large tower and the cell small tower for the basic layer broadcast service, and provides broadcast, multicast, or unicast transmission of the wide-area large tower base station or the cell small tower base station for the enhanced layer service.

[0088] The hybrid service gateway conducts signaling interactions with the wide-area large tower base station; sends control data to the wide-area large tower base station to configure and adjust the wide-area large tower superposition channel, and sends service data of the basic layer and the large tower enhanced layer to the wide-area large tower base station.

[0089] The hybrid service gateway conducts signaling interactions with the cell small tower base station; sends control data to the cell small tower base station to configure and adjust the cell small tower superposition channel, and sends service data of the basic layer and the small tower enhanced layer to the cell small tower base station.

[0090] The hybrid service gateway conducts signaling interactions with the reference access user; sends control data related to the basic layer and enhanced layer services to the reference access user; among them, the enhanced layer service is the large tower enhanced layer service or the small tower enhanced layer service.

[0091] After receiving the control data sent by the hybrid service gateway, the wide-area large tower base station configures and adjusts the parameters of the wide-area large tower superposition channel; receives the service data of the basic layer and the large tower enhanced layer sent by the hybrid service gateway, and performs processing such as transmitter encoding and modulation on the received service data according to the wide-area large tower transmission protocol to obtain the wide-area large tower basic layer sub-channel signal and the enhanced layer sub-channel signal, and further obtains the superposition channel signal composed of the wide-area large tower basic layer sub-channel signal and the enhanced layer sub-channel signal, and transmits it through the wide-area large tower base station.

[0092] After receiving the control data sent by the hybrid service gateway, the small cell tower base station configures and adjusts the small cell tower superimposed channel parameters; after receiving the service data of the basic layer and the small cell tower enhanced layer sent by the hybrid service gateway, according to the small cell tower transmission protocol, the received service data is processed such as sender encoding and modulation, etc., to obtain the small cell tower basic layer sub-channel signal and the enhanced layer sub-channel signal, and further obtain the superimposed channel signal formed by superimposing the small cell tower basic layer sub-channel signal and the enhanced layer sub-channel signal, and transmit it through the small cell tower base station.

[0093] After receiving the control data sent by the hybrid service gateway, the reference access user configures the terminal parameters; according to the control data sent by the hybrid service gateway, or receives and demodulates and decodes the basic layer broadcast signal to obtain the basic layer broadcast service data, or receives and demodulates and decodes the enhanced layer broadcast, multicast or unicast signal of the wide area large tower or the small cell tower to obtain the enhanced layer service data of the wide area large tower base station or the small cell tower base station.

[0094] Among them, the services supported by a hybrid service gateway can come from different operators, such as mobile network operators or broadcast network operators.

[0095] Furthermore, the one-way control, interactive signaling and superimposed service data from a hybrid service gateway to the wide area large tower base station and the small cell tower base station can be connected through the optical fiber and / or fixed wireless channel of the core network, or can be connected through satellite relay forwarding.

[0096] Furthermore, a hybrid service gateway can interact with one wide area large tower base station, or can interact with multiple wide area large tower base stations.

[0097] Furthermore, a hybrid service gateway can interact with one small cell tower base station, or can interact with multiple small cell tower base stations.

[0098] Furthermore, a hybrid service gateway can support one broadcast service, multiple broadcast services, or can also support multiple hybrid services.

[0099] This embodiment further illustrates that the superimposed signal (including the basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast or unicast signal) and the device can achieve deep coverage of the broadcast service for handheld terminals and provide various value-added services by taking the wide area large tower base station and the small cell tower base station that carry the hybrid service in a certain area to transmit the superimposed signal and the coverage range. As Figure 3 shown, it is a schematic diagram of the service range of the regional hybrid service and the signal coverage range transmitted by the wide area large tower base station and the small cell tower base station within the service range.

[0100] The hybrid service gateway interacts with the wide area large tower base station, the small cell tower base station and the reference access user through signaling.

[0101] The hybrid service gateway sends control data to the wide-area large tower to configure and adjust the superimposed channel of the wide-area large tower; it sends the base layer and large tower enhanced layer service data to the wide-area large tower base station. The wide-area large tower base station receives the control data sent by the hybrid service gateway to configure and adjust the base layer sub-channel and enhanced layer sub-channel of the wide-area large tower; it receives the base layer and large tower enhanced layer service data sent by the hybrid service gateway, and according to the wide-area large tower transmission protocol, performs processing such as transmit-end encoding and modulation on the service data to obtain the base layer sub-channel broadcast signal of the large tower and the enhanced layer sub-channel broadcast, multicast or unicast signal, obtains the large tower superimposed channel signal according to the traditional direct superposition or non-linear superposition method, and further obtains the wide-area large tower physical layer channel signal, which is transmitted through the wide-area large tower base station.

[0102] The hybrid service gateway sends control data to the small cell tower to configure and adjust the superimposed channel of the small cell tower; it sends the base layer and small tower enhanced layer service data to the small cell tower base station. The small cell tower base station receives the control data sent by the hybrid service gateway to configure and adjust the base layer sub-channel and enhanced layer sub-channel of the small cell tower; it receives the base layer and small tower enhanced layer service data sent by the hybrid service gateway, and according to the small cell tower transmission protocol, performs processing such as transmit-end encoding and modulation on the service data to obtain the base layer sub-channel broadcast signal of the small tower and the enhanced layer sub-channel broadcast, multicast or unicast signal, obtains the small tower superimposed channel signal according to the traditional direct superposition or non-linear superposition method, and further obtains the small cell tower physical layer channel signal, which is transmitted through the small cell tower base station.

[0103] The hybrid service gateway performs signaling interaction with the reference access user through the small cell tower base station, and the hybrid service gateway obtains the current information and historical information of the reference access user such as the cell location, the required base layer broadcast service, the required enhanced layer service, and the terminal reception condition.

[0104] The hybrid service gateway decides whether the reference access user can access the base layer broadcast service according to the base layer sub-channel configuration and the obtained reference access user information. If access is allowed, it sends control data to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the base layer sub-channel signal carrying the base layer broadcast service data.

[0105] The hybrid service gateway decides whether the reference access user can access the enhanced layer service according to the enhanced layer sub-channel configuration and the obtained reference access user information. If access is allowed, it sends control data to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the enhanced layer sub-channel signal carrying the enhanced layer service data.

[0106] The reference access user receives the control data sent by the hybrid service gateway, or receives the basic layer sub-channel signal carrying the basic layer broadcast service data, or receives the enhanced layer sub-channel signal carrying the enhanced layer service data. Among them, the enhanced layer sub-channel signal is a large tower enhanced layer sub-channel signal or a small tower enhanced layer sub-channel signal; the reference access user demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data and enhanced layer service data.

[0107] In summary, the present invention proposes a heterogeneous signal single-frequency network superposition service distribution method and device. The device specifically includes a hybrid service gateway module, a wide-area large tower base station supporting adaptive transmission, a cell small tower base station supporting adaptive transmission, and a reference access user. Among them, the hybrid service gateway performs signaling interaction with the reference access user through the cell small tower base station to obtain relevant information of the reference access user. The hybrid service gateway uses the superposition channel spectrum comprehensive benefit as a measurement index, and combines the obtained reference access user information to optimize the superposition channel parameters, including power parameters, superposition channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters (wherein, the superposition channel is a physical layer sub-channel with time-frequency orthogonal segmentation, and is further segmented into a basic layer sub-channel and an enhanced layer sub-channel). Thanks to the two-way interaction ability of the reference access user, the hybrid service gateway can adaptively adjust the superposition channel parameters. The method of the present invention can integrate large and small tower infrastructures to provide deep coverage of broadcast services and multiple value-added services for handheld terminals.

[0108] The present invention considers integrating a wide-area broadcast large tower base station and a cell small tower base station to construct a network system architecture that serves mobile phone terminals and provides multiple value-added services. On the one hand, the physical layer basic layer sub-channel signals of the wide-area large tower base station and the cell small tower base station are used to form a heterogeneous signal single-frequency network to improve the coverage ability of the basic layer broadcast service and better serve mobile phone terminals; on the other hand, the non-orthogonal multiplexing technology is used to superimpose a physical layer enhanced layer sub-channel on the physical layer basic layer sub-channel of the wide-area large tower base station or the cell small tower base station to form a superposition channel, which meets the complex and diverse value-added service requirements and improves the transmission efficiency of the physical layer channel.

[0109] Innovation point 1: Propose an evaluation method for a heterogeneous signal single-frequency network, that is, the superposition channel spectrum comprehensive benefit: select the sum of the average expected spectrum benefit of the basic layer sub-channel and the average empirical spectrum benefit of all enhanced layer sub-channels as the superposition channel spectrum comprehensive benefit, and optimize the superposition channel parameters to improve the superposition channel spectrum comprehensive benefit. The method of the present invention can integrate large and small tower infrastructures to provide deep coverage of broadcast services and multiple value-added services for handheld terminals.

[0110] Innovation Point 2: The wide-area large tower base station and the small cell tower base station adaptively transmit the basic layer sub-channel signal and the enhanced layer sub-channel signal; this innovation point benefits from the two-way interaction function of the reference access user; the hybrid service gateway located at the core network performs signaling interaction with the reference access user through the small cell tower base station, obtains relevant information of the reference access user, and uses the comprehensive revenue of the superimposed channel spectrum as a measurement index. Combining the reference access user information, the hybrid service gateway adaptively adjusts the superimposed channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, superimposed channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters.

[0111] Furthermore, in the present invention, the wide-area large tower base station may be other high-power large-bandwidth broadcast base stations with wide-area coverage characteristics such as a satellite communication launch platform or a flying boat in addition to the traditional ground broadcast large tower. The number of small cell tower base stations may be one or more, and may be 5G mobile communication base stations, 4G mobile communication base stations, etc. The reference access user may be a fixed terminal access user, an enterprise user, etc. in addition to a mobile phone terminal user.

[0112] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A method for distributing superposed services in a heterogeneous signal single-frequency network, characterized in that, the method for distributing superposed services in the heterogeneous signal single-frequency network includes: The hybrid service gateway at the core network adaptively adjusts the superposition channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, superposition channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters; The wide-area large tower base station obtains the wide-area large tower superposition channel information, configures and adjusts the wide-area large tower superposition channel, superposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the large tower superposition channel signal, and further obtains the wide-area large tower physical layer channel signal, and transmits it through the wide-area large tower base station; The small cell tower base station obtains the small cell tower superposition channel information, configures and adjusts the small cell tower superposition channel, superposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal to obtain the small tower superposition channel signal, and further obtains the small cell tower physical layer channel signal, and sends it through the small cell tower base station; The reference access user receives the basic layer sub-channel signal carrying the basic layer broadcast service data or the enhanced layer sub-channel signal carrying the enhanced layer service data, and demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data or enhanced layer service data.

2. The method for distributing superposed services in a heterogeneous signal single-frequency network according to claim 1, characterized in that, the hybrid service gateway at the core network adaptively adjusts the superposition channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, superposition channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters, specifically including: The hybrid service gateway at the core network performs signaling interaction with the reference access user through the small cell tower base station to obtain the current information and historical information of the cell location, required basic layer broadcast service, required enhanced layer service, and reception conditions of the reference access user, uses the comprehensive benefit of the superposition channel spectrum as a measurement index, and combines the obtained reference access user information to optimize the superposition channel parameters, and the superposition channel parameters include power parameters, superposition channel frame structure parameters, and basic layer sub-channel parameters; After the hybrid service gateway optimizes the superposition channel parameters, using the current comprehensive benefit of the enhanced layer sub-channel spectrum as a measurement index, and combining the current reference access user information of the current enhanced layer service, it optimizes the current enhanced layer sub-channel parameters, where the comprehensive benefit of the enhanced layer sub-channel spectrum refers to the product of the expected number of access users in the enhanced layer, spectral efficiency, and the corresponding service weight; The hybrid service gateway performs signaling interaction with the reference access user through the small cell tower base station to obtain the relevant information of the reference access user, uses the comprehensive benefit of the superposition channel spectrum as a measurement index, and combines the reference access user information. The hybrid service gateway adaptively adjusts the superposition channel parameters of the wide-area large tower base station and the small cell tower base station, including power parameters, superposition channel frame structure parameters, basic layer sub-channel parameters, and enhanced layer sub-channel parameters.

3. The method for distributing superposed services in a heterogeneous signal single-frequency network according to claim 2, characterized in that, The basic layer sub-channels include the wide-area large tower basic layer sub-channel and the small cell tower basic layer sub-channel; the enhanced layer sub-channel is either the wide-area large tower enhanced layer sub-channel or the small cell tower enhanced layer sub-channel.

4. The heterogeneous signal single-frequency network superimposed service distribution method according to claim 1, characterized in that the wide-area large tower base station obtains the wide-area large tower superimposed channel information, configures and adjusts the wide-area large tower superimposed channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast or unicast signal to obtain the large tower superimposed channel signal, and further obtains the wide-area large tower physical layer channel signal, and transmits it through the wide-area large tower base station, specifically including: The wide-area large tower base station obtains the wide-area large tower superimposed channel information according to the fixed configuration of the wide-area large tower, or performs signaling interaction with the hybrid service gateway, and obtains the wide-area large tower superimposed channel information according to the control data received from the hybrid service gateway; The wide-area large tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the wide-area large tower superimposed channel, receives the basic layer and large tower enhanced layer service data sent by the hybrid service gateway, and performs transmit-end encoding and modulation processing on the basic layer and large tower enhanced layer service data according to the wide-area large tower transmission protocol to obtain the basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast or unicast signal, superimpose the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast or unicast signal to obtain the large tower superimposed channel signal, and further obtain the wide-area large tower physical layer channel signal, and transmit it through the wide-area large tower base station.

5. The heterogeneous signal single-frequency network superimposed service distribution method according to claim 4, characterized in that the small cell tower base station obtains the small cell tower superimposed channel information, configures and adjusts the small cell tower superimposed channel, superimposes the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast or unicast signal to obtain the small tower superimposed channel signal, and further obtains the small cell tower physical layer channel signal, and transmits it through the small cell tower base station, specifically including: The small cell tower base station obtains the small cell tower superimposed channel information according to the fixed configuration of the small cell tower, or performs signaling interaction with the hybrid service gateway, and obtains the small cell tower superimposed channel information according to the control data received from the hybrid service gateway; The small cell tower receives the control data sent by the hybrid service gateway, configures and adjusts the small cell tower superimposed channel, receives the basic layer and small cell tower enhanced layer service data sent by the hybrid service gateway, and performs transmit-end encoding and modulation processing on the basic layer service data and the small cell tower enhanced layer service data according to the small cell tower transmission protocol to obtain the basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast or unicast signal, superimpose the basic layer sub-channel signal and the enhanced layer sub-channel broadcast, multicast or unicast signal to obtain the small tower superimposed channel signal, and further obtain the small cell tower physical layer channel signal, and transmit it through the small cell tower base station.

6. The heterogeneous signal single-frequency network superimposed service distribution method according to claim 5, characterized in that the power parameter, frame structure parameter, and basic layer sub-channel parameter of the large tower superimposed channel and the small tower superimposed channel are the same, and the wide-area large tower basic layer sub-channel signal and the small cell tower basic layer sub-channel signal constitute a single-frequency network transmission.

7. The heterogeneous signal single-frequency network superposition service distribution method according to claim 1, characterized in that, the reference access user receives a basic layer sub-channel signal carrying basic layer broadcast service data or an enhanced layer sub-channel signal carrying enhanced layer service data, and demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the basic layer broadcast service data or enhanced layer service data to be received, specifically including: The reference access user performs signaling interaction with the hybrid service gateway through the small cell base station. The hybrid service gateway obtains the current information and historical information of the cell location of the reference access user, the required basic layer broadcast service, the required enhanced layer service, and the terminal reception conditions; The hybrid service gateway determines whether the reference access user can access the basic layer broadcast service according to the basic layer sub-channel configuration and the obtained reference access user information. If access is allowed, control data is sent to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the basic layer sub-channel signal carrying the basic layer broadcast service data; The hybrid service gateway determines whether the reference access user can access the enhanced layer service according to the enhanced layer sub-channel configuration and the obtained reference access user information. If access is allowed, control data is sent to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the enhanced layer sub-channel signal carrying the enhanced layer service data; The reference access user receives the control data sent by the hybrid service gateway, and receives the basic layer sub-channel signal carrying the basic layer broadcast service data or the enhanced layer sub-channel signal carrying the enhanced layer service data; The reference access user demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the basic layer broadcast service data or enhanced layer service data to be received.

8. The heterogeneous signal single-frequency network superposition service distribution method according to claim 7, characterized in that, the enhanced layer sub-channel signal is a macro cell enhanced layer sub-channel signal or a small cell enhanced layer sub-channel signal.

9. The heterogeneous signal single-frequency network superposition service distribution method according to claim 2, characterized in that, the superposition channel spectrum comprehensive benefit is the sum of the average expected spectrum benefit of the basic layer sub-channel and the average empirical spectrum benefit of all enhanced layer sub-channels.

10. The heterogeneous signal single-frequency network superposition service distribution method according to claim 1, characterized in that, The one-way control, interactive signaling, and superposition service data from a hybrid service gateway to a wide-area macro cell base station and a small cell base station are connected through the optical fiber and / or fixed wireless channel of the core network, or are connected through satellite relay forwarding.

11. The heterogeneous signal single-frequency network superposition service distribution method according to claim 1, characterized in that, a hybrid service gateway interacts with one or more wide-area macro cell base stations; a hybrid service gateway interacts with one or more small cell base stations; a hybrid service gateway supports one or more broadcast services, or supports multiple hybrid services.

12. A heterogeneous signal single-frequency network superposition service distribution device, characterized in that, The heterogeneous signal single-frequency network superposition service distribution device includes: a hybrid service gateway, a wide-area large tower base station, a cell small tower base station, and a reference access user; The hybrid service gateway conducts control and signaling interactions with the wide-area large tower base station, the cell small tower base station, and the reference access user; The hybrid service gateway sends control data to the wide-area large tower base station, configures and adjusts the wide-area large tower superposition channel, and sends basic layer and large tower enhanced layer service data to the wide-area large tower base station. The wide-area large tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the wide-area large tower basic layer sub-channel and enhanced layer sub-channel, receives the basic layer and large tower enhanced layer service data sent by the hybrid service gateway, performs transmit-end coding and modulation processing on the service data according to the wide-area large tower transmission protocol, obtains the large tower basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal, superimposes them to obtain the large tower superposition channel signal, and further obtains the wide-area large tower physical layer channel signal, which is transmitted through the wide-area large tower base station; The hybrid service gateway sends control data to the cell small tower base station, configures and adjusts the cell small tower superposition channel, and sends basic layer and small tower enhanced layer service data to the cell small tower base station. The cell small tower base station receives the control data sent by the hybrid service gateway, configures and adjusts the cell small tower basic layer sub-channel and enhanced layer sub-channel, receives the basic layer and small tower enhanced layer service data sent by the hybrid service gateway, performs transmit-end coding and modulation processing on the service data according to the cell small tower transmission protocol, obtains the small tower basic layer sub-channel broadcast signal and the enhanced layer sub-channel broadcast, multicast, or unicast signal, superimposes them to obtain the cell small tower superposition channel signal, and obtains the cell small tower physical layer channel signal, which is transmitted through the cell small tower base station; The hybrid service gateway conducts signaling interactions with the reference access user through the cell small tower base station, and the hybrid service gateway obtains the current information and historical information of the cell location, the required basic layer broadcast service, the required enhanced layer service, and the terminal reception conditions of the reference access user; The hybrid service gateway determines whether the reference access user can access the basic layer broadcast service according to the basic layer sub-channel configuration and the obtained reference access user information. If access is allowed, it sends control data to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the basic layer sub-channel signal carrying the basic layer broadcast service data; The hybrid service gateway determines whether the reference access user can access the enhanced layer service according to the enhanced layer sub-channel configuration and the obtained reference access user information. If access is allowed, it sends control data to the reference access user to configure the receiving terminal of the reference access user and demodulate and decode the enhanced layer sub-channel signal carrying the enhanced layer service data; The reference access user receives the control data sent by the hybrid service gateway, or receives the basic layer sub-channel signal carrying the basic layer broadcast service data, or receives the enhanced layer sub-channel signal carrying the enhanced layer service data, where the enhanced layer sub-channel signal is a large tower enhanced layer sub-channel signal or a small tower enhanced layer sub-channel signal; the reference access user demodulates and decodes the received basic layer sub-channel signal or enhanced layer sub-channel signal to obtain the to-be-received basic layer broadcast service data and enhanced layer service data.

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