CN105763302B - Super cell-based data transmission method and system - Google Patents

Abstract

The invention discloses a kind of data transmission method and system based on super cell, the system includes: equipment of the core network, the first base station being connect with the equipment of the core network, at least one second base station being connect with the first base station by the ethernet link and the terminal being connect respectively with the first base station and at least one second base station, wherein, first base station and the second base station carry out data interaction by ethernet link, through the invention, at least to solve the problems, such as that the network architecture is at high cost in the prior art and framework is inflexible.

Description

Super cell-based data transmission method and system

technical field

The present invention relates to the communication field, in particular, to a super cell-based data transmission method and system.

Background technique

At present, the super cell technology is widely used in high-speed rail and airways. The super cell is composed of multiple CPs (Cell Portions, some cells). These CPs still logically belong to the same cell and share common cell resources, such as cell ID (Identity, identification number), primary and secondary synchronization signals, frequency modulation sequences, and CRS (Common Reference Signal, common reference signal)/DMRS (Demodulation Reference Signal)/SRS (Sounding Reference Signal, channel sounding reference signal) sequence, etc. There is no mobility problem between different CPs in the same super cell, which turns the mobility problem into a detection and scheduling problem between different CPs in a cell.

This technology can combine multiple independent cells into logically large cells to reduce terminal interference and frequent handover. Especially for an ultra-dense network (Ultra Density Network) composed of a large number of base stations, the super cell is of great help to improve the network KPI (Key Performance Indicator, key performance indicator).

Now the super cell generally adopts the network architecture of BBU (Building Base band Unit, baseband processing unit) + RRU (Radio Remote Unit, radio frequency remote unit). In this mode, the data of the original multiple cells are combined Processing, jointly process and send the downlink data of the original RRUs or distributed antennas of multiple cells, and the uplink data from multiple RRUs or distributed antenna groups, so as to achieve the purpose of improving system performance.

However, with the above-mentioned network architecture, since the BBU and the RRU are connected by an optical fiber link, for an LTE (Long Term Evolution, Long Term Evolution) network designed for continuous coverage, for example, ultra-dense coverage of micro cells (the distance between stations is 50- 100m), urban building shadow compensation, floor vertical coverage, and large-area continuous coverage, etc., the cost is too high. In addition, in the actual networking, the current solution cannot flexibly take into account both continuous coverage and hotspot coverage, which is not conducive to network autonomy. Optimization, which affects KPIs.

Contents of the invention

The present invention provides a super cell-based data transmission method and system to at least solve the problems of high cost and inflexible network architecture in the prior art.

According to one aspect of the present invention, a data transmission system based on a super cell is provided, which is characterized in that it includes: a core network device, a first base station connected to the core network device, and the first base station through the At least one second base station connected by an Ethernet link and terminals respectively connected to the first base station and the at least one second base station, wherein,

The core network device is configured to perform data interaction with the first base station;

The first base station is configured to perform data interaction with the at least one second base station and the core network device through the Ethernet link, and perform data interaction with the terminal through an air interface;

The at least one second base station is configured to perform data interaction with the first base station through the Ethernet link, and perform data interaction with the terminal through the air interface;

The terminal is configured to perform data interaction with the first base station and the at least one second base station through the air interface.

Preferably, the terminal is configured to send uplink data to the first base station and the at least one second base station through an air interface;

The first base station is configured to demodulate the uplink data, and obtain the first physical uplink shared channel PUSCH demodulation data and the first hybrid automatic repeat request HARQ identification message;

The at least one second base station is configured to demodulate the uplink data, obtain second PUSCH demodulation data and second HARQ identification information, send the second HARQ identification information to the first base station, and cache the The second PUSCH demodulation data;

The first base station is further configured to acquire the second PUSCH buffered by the at least one second base station when the first HARQ identification information indicates failure and the received second HARQ identification information indicates success Demodulate data, and send the second PUSCH demodulated data to the core network device.

Preferably, the first base station is further configured to, when the first HARQ identification information indicates success, send the first PUSCH demodulation data to the core network device.

Preferably, the first base station is configured to, when the first HARQ identification information is marked as failure and all received second HARQ identification information sent by the second base station are marked as failure, acquire the at least one soft bit information of the second base station, and after the local soft bit information is successfully combined with the soft bit information of the at least one second base station, the combined data is sent to the core network device.

Preferably, the first base station is further configured to acquire the soft bit information of the next second base station after failing to combine the local soft bit information with the soft bit information of the at least one second base station, and After the soft bit information is successfully combined with the soft bit information of the next second base station, the combined data is sent to the core network device.

Preferably, the first base station is further configured to, after demodulating the uplink data, obtain first physical uplink control channel PUCCH demodulation information;

The at least one second base station is further configured to obtain second PUCCH demodulation information after demodulating the uplink data, and send the second PUCCH demodulation information to the first PUCCH demodulation information through the Ethernet link. a base station;

The first base station is further configured to combine the first PUCCH demodulation information and the second PUCCH demodulation information after receiving the first PUCCH demodulation information sent by the at least one second base station through the Ethernet link. The PUCCH demodulates information to obtain scheduling information, and performs uplink scheduling according to the scheduling information after receiving the uplink data again.

Preferably, the core network device is configured to send downlink data to the first base station;

The first base station is configured to receive the downlink data sent by the core network equipment, perform downlink scheduling according to the scheduling information, and send the downlink data to the at least one a second base station, and sending the downlink data to the terminal through the air interface;

The at least one second base station is configured to receive the downlink data sent by the first base station through the Ethernet link, and send the downlink data to the terminal through the air interface;

The terminal is configured to receive the downlink data sent by the first base station and the at least one second base station through the air interface.

According to another aspect of the present invention, a super cell-based data transmission method is provided, including:

The first base station receives the uplink data sent by the terminal, and demodulates the uplink data to obtain the first physical uplink shared channel PUSCH demodulation data and the first hybrid automatic repeat request HARQ identification message;

receiving second HARQ identification information sent by at least one second base station through an Ethernet link;

When the first HARQ identification information indicates failure and the second HARQ identification information indicates success, acquire the second PUSCH demodulation data buffered by the at least one second base station through the Ethernet link, and sending the second PUSCH demodulation data to the core network device, wherein the second HARQ identification information and the second PUSCH demodulation data are the demodulation received by the at least one second base station Obtained from upstream data.

Preferably, when the first HARQ identification information is marked as failure and all the received second HARQ identification information sent by the second base station are marked as failure, acquiring the soft bit information of the at least one second base station, And after the local soft bit information is successfully combined with the soft bit information of the at least one second base station, the combined data is sent to the core network device.

Preferably, after failing to combine the local soft bit information with the soft bit information of the at least one second base station, acquire the soft bit information of the next second base station, and combine the local soft bit information with the next first base station After the soft bit information of the two base stations is successfully combined, the combined data is sent to the core network device.

According to another aspect of the present invention, a super cell-based data transmission method is provided, including:

The second base station receives the uplink data sent by the terminal, and demodulates the uplink data to obtain the second physical uplink shared channel PUSCH demodulation data and the second hybrid automatic repeat request HARQ identification message;

Buffering the second PUSCH demodulation data, and sending the second HARQ identification message to the first base station through an Ethernet link;

When the first base station determines that the first HARQ identification information obtained according to the demodulation of the uplink data is marked as failed and the second HARQ identification information is marked as successful, the buffered first HARQ identification information is marked as successful through the Ethernet link. The two PUSCH demodulated data are sent to the first base station.

According to the present invention, a data transmission system based on a super cell is provided, and the system includes: a core network device, a first base station connected to the core network device, and a first base station connected to the first base station through the Ethernet link At least one second base station and terminals respectively connected to the first base station and the at least one second base station, wherein the core network equipment is configured to perform data interaction with the first base station; the first base station , configured to perform data interaction with the at least one second base station and the core network device through the Ethernet link, and perform data interaction with the terminal through an air interface; the at least one second base station is configured to performing data interaction with the first base station through the Ethernet link, and performing data interaction with the terminal through the air interface; the terminal is configured to communicate with the first base station and the first base station through the air interface through the air interface In this way, since the first base station and the second base station are connected through an Ethernet link, there is no need to deploy a high-cost optical fiber link, and it can also be deployed for base stations that do not support optical fiber interfaces. The super cell solves the problem of high cost and inflexible network architecture, and can take into account hotspots and continuous coverage to improve user experience.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic structural diagram of a super cell-based data transmission system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a timing sequence of data transmission according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a data transmission method based on a super cell according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of another super cell-based data transmission method according to an embodiment of the present invention;

Fig. 5 is a schematic flowchart of another super cell-based data transmission method according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In this embodiment, a data transmission system based on a super cell is provided. FIG. 1 is a schematic structural diagram of a data transmission system based on a super cell according to an embodiment of the present invention. As shown in FIG. 1 , the system includes:

A core network device 101, a first base station 102 connected to the core network device 101, at least one second base station 104 connected to the first base station 102 through the Ethernet link 103, and the first base station 102 and the at least A terminal 105 connected to a second base station 104, wherein,

The core network device 101 is configured to perform data interaction with the first base station 102;

The first base station 102 is configured to perform data interaction with the at least one second base station 104 and the core network device 101 through the Ethernet link 103, and perform data interaction with the terminal 105 through an air interface;

The at least one second base station 104 is configured to perform data interaction with the first base station 102 through the Ethernet link 103, and perform data interaction with the terminal 105 through the air interface;

The terminal 105 is configured to perform data interaction with the first base station 102 and the at least one second base station 104 through the air interface.

In this way, since the first base station and the second base station are connected through an Ethernet link, there is no need to deploy a costly optical fiber link, and for base stations that do not support optical fiber interfaces, super cells can also be deployed, which solves the problem of high network architecture costs and The problem of inflexible architecture can take into account hotspots and continuous coverage to improve user experience. In addition, when the system is not configured with super cells, it can degenerate into independent deployment of multiple base stations.

The following describes the system through downlink data transmission and uplink data transmission respectively. For uplink data transmission, preferably,

The terminal 105 is configured to send uplink data to the first base station 102 and the at least one second base station 104 through an air interface;

The first base station 102 is configured to demodulate the uplink data, and obtain first PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) demodulated data and a first HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) identification message;

The at least one second base station 104 is used to demodulate the uplink data, obtain the second PUSCH demodulation data and the second HARQ identification information, and send the second HARQ identification information to the first base station 102, and buffer the second PUSCH demodulation data;

The first base station 101 is further configured to acquire the second PUSCH demodulation data buffered by the at least one second base station 104 when the first HARQ identification information indicates failure and the received second HARQ identification information indicates success , and send the second PUSCH demodulated data to the core network device.

Wherein, the first base station and the second base station respectively demodulate the uplink data at the physical layer, and the first base station combines the first PUSCH demodulation data and the second PUSCH demodulation data at the MAC (Media Access Control, media access control) layer, In this way, when the first base station determines that the first PUSCH demodulation data demodulated locally is wrong and the second PUSCH demodulation data demodulated by at least one second base station is correct, then the correct second PUSCH demodulation data is obtained. The second PUSCH demodulation data buffered by the second base station corresponding to the modulation data avoids resource waste caused by sending all the second PUSCH demodulation data to the first base station, thereby saving Ethernet bandwidth and reducing delay.

Preferably, the first base station 102 is further configured to send the first PUSCH demodulation data to the core network device when the first HARQ identification information indicates success, so that when the first base station locally demodulates If the first PUSCH data is correct, the demodulated data of the first PUSCH is directly sent to the core network device, and there is no need to obtain the demodulated data of the second PUSCH demodulated by the second base station, thereby saving Ethernet bandwidth and reduce latency.

Preferably, the first base station 102 is configured to acquire the at least one second base station when the first HARQ identification information is marked as failed and all received second HARQ identification information sent by the second base station is marked as failed. and after the local soft bit information and the soft bit information of the at least one second base station are successfully combined, the combined data is sent to the core network device.

Preferably, the first base station 102 is further configured to acquire the soft bit information of the next second base station after failing to combine the local soft bit information with the soft bit information of the at least one second base station, and to After the bit information is successfully combined with the soft bit information of the next second base station, the combined data is sent to the core network device.

Wherein, the first base station acquires the soft bit information of the second base station at the physical layer, combines the soft bit information of the local physical layer with the soft bit information acquired from the second base station, and sends the combined data to the core network equipment, In this way, when the combination of PUSCH demodulated data cannot be performed at the MAC layer, the combination of soft bit information can be performed at the physical layer.

Preferably, the first base station 102 is further configured to obtain first PUCCH (PhysicalUplink Control Channel, Physical Uplink Control Channel) demodulation information after demodulating the uplink data;

The at least one second base station 104 is further configured to obtain second PUCCH demodulation information after demodulating the uplink data, and send the second PUCCH demodulation information to the first base station 102 through the Ethernet link 103 ;

The first base station 102 is further configured to combine the first PUCCH demodulation information and the second PUCCH demodulation information after receiving the first PUCCH demodulation information sent by the at least one second base station through the Ethernet link 103 information to obtain scheduling information, and after receiving the uplink data again, perform uplink scheduling according to the scheduling information.

For downlink data transmission, preferably,

The core network device 101 is configured to send downlink data to the first base station 102;

The first base station 102 is configured to receive the downlink data sent by the core network device 101, perform downlink scheduling according to the scheduling information, and send the downlink data to the at least one second base station 104 through the Ethernet link 103 , and send the downlink data to the terminal 105 through the air interface;

The at least one second base station 104 is configured to receive the downlink data sent by the first base station 102 through the Ethernet link 103, and send the downlink data to the terminal 105 through the air interface;

The terminal 105 is configured to receive the downlink data sent by the first base station 102 and the at least one second base station 104 through the air interface.

Wherein, after receiving the downlink data, the first base station performs uplink scheduling at the MAC layer, and sends the downlink data to the physical layer of the second base station through the Ethernet link, and the first base station and the second base station are at the same time on the physical layer sent to the terminal.

Referring to FIG. 2 for description, as shown in FIG. 2, FIG. 2 is a schematic diagram of a timing sequence of data transmission according to an embodiment of the present invention. For uplink data transmission, after the terminal sends uplink data, the first base station and the second base station simultaneously receive. And perform PUCCH demodulation processing and PUSCH demodulation processing, the second base station transmits the data after PUCCH demodulation processing and PUSCH demodulation processing to the MAC layer of the first base station through channel 1 for processing; for downlink data transmission, the first base station After receiving the downlink data sent by the core network equipment, it is transmitted to the physical layer of the second base station through channel 2, and the first base station and the second base station send the downlink data on the physical layer at the same time, wherein channel 1 and channel 2 are both Ethernet link channel.

Fig. 3 is a schematic flowchart of a data transmission method based on a super cell according to an embodiment of the present invention. As shown in Fig. 3 , the execution subject of this embodiment is the first base station, and the steps of the process include:

S301. The first base station receives uplink data sent by the terminal;

S302. Demodulate the uplink data to obtain the first physical uplink shared channel PUSCH demodulation data and the first hybrid automatic repeat request HARQ identification message;

S303. Receive second HARQ identification information sent by at least one second base station through an Ethernet link;

S304. When the first HARQ identification information indicates failure and the second HARQ identification information indicates success, acquire the second PUSCH demodulation data buffered by the at least one second base station through the Ethernet link;

It should be noted that, when it is determined that the first HARQ identification information is marked as successful, the primary base station sends the local first PUSCH demodulated data to the core network device.

S305. Send the second PUSCH demodulated data to the core network device;

Wherein, the second HARQ identification information and the second PUSCH demodulated data are obtained by demodulating the received uplink data by the at least one second base station.

It should be noted that the first base station and the second base station respectively demodulate the uplink data at the physical layer, and the first base station combines the first PUSCH demodulated data and the second PUSCH demodulated data at the MAC layer. In this way, the first base station It is determined that the first PUSCH demodulation data demodulated locally is wrong and the second PUSCH demodulation data demodulated by at least one second base station is correct, then obtain the second PUSCH demodulation data corresponding to the correct second PUSCH demodulation data. The second PUSCH demodulation data buffered by the base station avoids resource waste caused by sending all the second PUSCH demodulation data to the first base station, thereby saving Ethernet bandwidth and reducing time delay.

Preferably, when the first HARQ identification information is marked as failure and all the received second HARQ identification information sent by the second base station are marked as failure, the soft bit information of the at least one second base station is obtained, and locally After the soft bit information of the at least one second base station is successfully combined with the soft bit information of the at least one second base station, the combined data is sent to the core network device.

Preferably, after failing to combine the local soft bit information with the soft bit information of the at least one second base station, acquiring the soft bit information of the next second base station, and combining the local soft bit information with the next second base station After the soft bit information of the data is merged successfully, the merged data is sent to the core network device.

Wherein, the first base station acquires the soft bit information of the second base station at the physical layer, combines the soft bit information of the local physical layer with the soft bit information acquired from the second base station, and sends the combined data to the core network equipment, In this way, when the combination of PUSCH demodulated data cannot be performed at the MAC layer, the combination of soft bit information can be performed at the physical layer.

Preferably, the first base station obtains first PUCCH demodulation information after demodulating the uplink data, and receives second PUCCH demodulation information obtained after at least one second base station demodulates the uplink data through an Ethernet link, and combining the first PUCCH demodulation information and the second PUCCH demodulation information to obtain scheduling information, and after receiving the uplink data again, perform uplink scheduling according to the scheduling information; after receiving the uplink data again, the second base station , perform uplink scheduling according to the scheduling information.

Fig. 4 is a schematic flowchart of a data transmission method based on a super cell according to an embodiment of the present invention. As shown in Fig. 4, the execution subject of this embodiment is the second base station, and the process steps include:

S401. The second base station receives uplink data sent by the terminal;

S402. Demodulate the uplink data to obtain second PUSCH demodulated data and a second HARQ identification message;

S403. Buffer the second PUSCH demodulation data, and send the second HARQ identification message to the first base station through the Ethernet link;

S404, when the first base station determines that the first HARQ identification information obtained according to the demodulation of the uplink data is marked as failed and the second HARQ identification information is marked as successful, demodulate the buffered second PUSCH through the Ethernet link. The tuned data is sent to the first base station.

It should be noted that the first base station and the second base station respectively demodulate the uplink data at the physical layer, and the first base station combines the first PUSCH demodulated data and the second PUSCH demodulated data at the MAC layer. In this way, the first base station It is determined that the first PUSCH demodulation data demodulated locally is wrong and the second PUSCH demodulation data demodulated by at least one second base station is correct, then obtain the second PUSCH demodulation data corresponding to the correct second PUSCH demodulation data. The second PUSCH demodulation data buffered by the base station avoids resource waste caused by sending all the second PUSCH demodulation data to the first base station, thereby saving Ethernet bandwidth and reducing time delay.

The MAC layer of the main base station sends the second PUSCH demodulated data to the protocol stack above the RLC (Radio Link Control, radio link control) layer for processing. After processing, the data is sent to the S1 port, and then sent to the core through the S1 port network equipment.

Fig. 5 is a schematic flowchart of a data transmission method based on a super cell according to an embodiment of the present invention. As shown in Fig. 5, for the convenience of description, in the embodiment of the present invention, the first base station is recorded as the master base station, and the second base station is It is recorded as a secondary base station, which is not limited in the present invention. The primary base station is connected to at least one secondary base station through an Ethernet link. The process steps include:

S501. The terminal sends uplink data to the primary base station and the secondary base station.

S502. The primary base station demodulates the uplink data according to the uplink scheduling to obtain first PUCCH demodulation information, first PUSCH demodulation data, and first HARQ identification information.

Wherein, the master base station demodulates the uplink data at the physical layer according to the uplink scheduling result.

S503. The secondary base station demodulates the uplink data to obtain second PUCCH demodulation information, second PUSCH demodulation data, and second HARQ identification information.

Wherein, the first PUCCH demodulation information and the second PUCCH demodulation information include confidence.

In addition, the secondary base station demodulates the uplink data at the physical layer according to the uplink scheduling result.

S504, the secondary base station buffers the second PUSCH demodulation data, and sends the second PUCCH demodulation information and the second HARQ identification information to the primary base station through an Ethernet link.

S505, the primary base station combines the first PUCCH demodulation information and the second PUCCH demodulation information to obtain scheduling information.

Wherein, after receiving the uplink data again, the main base station combines all the PUCCH data, and then the main base station will perform uplink scheduling according to the scheduling information.

It should be noted that the primary base station performs uplink scheduling at the MAC layer according to the scheduling information, and sends the uplink scheduling result to the local physical layer and the physical layer of the secondary base station. In this way, when subsequent uplink data transmission is performed, the primary base station and the secondary base station The secondary base station demodulates uplink data at the physical layer according to the uplink scheduling result.

S506. When determining that the first HARQ identification information indicates failure and the second HARQ identification information indicates success, the primary base station acquires second PUSCH demodulation data of the secondary base station.

S507, the primary base station sends the second PUSCH demodulated data to the core network device.

Wherein, the MAC layer of the main base station sends the second PUSCH demodulation data to the protocol stack above the RLC (Radio Link Control, radio link control) layer for processing, and after processing, the data is sent to the S1 port and sent through the S1 port to core network equipment.

It should be noted that, when it is determined that the first HARQ identification information is marked as successful, the primary base station sends the local first PUSCH demodulated data to the core network device.

When the first HARQ identification information is marked as failure and all the received second HARQ identification information sent by the secondary base station are marked as failure, the primary base station obtains the soft bit information of the at least one secondary station, and in the local soft bit After the information is successfully combined with the soft bit information of the at least one secondary base station, the combined data is sent to the core network device.

After failing to combine the local soft bit information with the soft bit information of the at least one second base station, acquire the soft bit information of the next secondary base station, and merge the local soft bit information with the soft bit information of the next secondary base station After success, send the combined data to the core network device.

It should be noted that steps S501 to S507 are the process of the terminal sending uplink data to the core network device, and steps S507 to S511 are the process of the terminal sending downlink data to the core network device.

S508, the main base station receives the downlink data of the core network device through the S1 port.

S509, the primary base station performs downlink scheduling according to the scheduling information, and sends the downlink data to the secondary base station through the Ethernet link.

The primary base station performs downlink scheduling at the MAC layer, and sends the downlink scheduling result to the physical layer and the physical layer of the secondary base station, and the primary base station and the secondary base station send downlink data according to the downlink scheduling result. In addition, the primary base station performs uplink data at the MAC layer. Scheduling, and sending the uplink scheduling result to the local physical layer and the physical layer of the secondary base station, so that when performing uplink data transmission, the primary base station and the secondary base station demodulate the uplink data at the physical layer according to the uplink scheduling result.

S510, the main base station sends the downlink data to the terminal.

S511, the secondary base station sends the downlink data to the terminal.

It should be noted that the primary base station and the secondary base station send downlink data to the terminal at the same time.

With the above embodiment, the main base station and the secondary base station are connected through an Ethernet link, thus eliminating the need to deploy costly optical fiber links, and for base stations that do not support optical fiber interfaces, super cells can also be deployed, which solves the problem of high network architecture costs and The problem of inflexible architecture can take into account hotspots and continuous coverage to improve user experience. In addition, for uplink data transmission, it avoids sending all the second PUSCH demodulated data to the main base station to cause waste of resources, thereby saving Ethernet bandwidth and Reduce latency.

It should be noted that for this method embodiment, for the sake of simple description, it is expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to In the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In summary, the super cell system described in the present invention adopts the following technical solutions:

It consists of core network equipment, base stations, Gigabit and above Ethernet switches and terminals. The entities on the network side are interconnected through Ethernet switches, and the terminals are standard LTE devices;

There is a main base station, which handles the entire protocol layer of LTE. The others are secondary base stations, which only perform physical layer and radio frequency protocol layer processing;

On the control plane, the master base station performs master control and broadcasts to each secondary base station through Ethernet, and the secondary base station responds and executes and gives feedback;

On the data plane, the core network equipment only establishes a link with the main base station S1. The MAC-physical layer information is sent between the primary base station and each secondary base station through Ethernet. The downlink adopts Ethernet broadcast, and the uplink adopts selective unicast;

In terms of air interface, the downlink is sent by all base stations together. Uplink is received and demodulated by all base stations, and optimized by the main base station;

If the system is not configured as a super cell network, it can degenerate into independent deployment of multiple base stations.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A data transmission system based on a super cell, comprising: a core network device, a first base station connected to the core network device, and at least one first base station connected to the first base station through an Ethernet link Two base stations and terminals respectively connected to the first base station and the at least one second base station, wherein, The core network device is configured to perform data interaction with the first base station; The first base station is configured to perform data interaction with the at least one second base station and the core network device through the Ethernet link, and perform data interaction with the terminal through an air interface; The at least one second base station is configured to perform data interaction with the first base station through the Ethernet link, and perform data interaction with the terminal through the air interface; The terminal is configured to perform data interaction with the first base station and the at least one second base station through the air interface; Wherein, the terminal is configured to send uplink data to the first base station and the at least one second base station through an air interface; The first base station is configured to demodulate the uplink data, and obtain the demodulation data of the first physical uplink shared channel PUSCH and the first hybrid automatic repeat request HARQ identification information; The at least one second base station is configured to demodulate the uplink data, obtain second PUSCH demodulation data and second HARQ identification information, send the second HARQ identification information to the first base station, and cache the The second PUSCH demodulation data; The first base station is further configured to acquire the demodulation of the second PUSCH buffered by the at least one second base station when the first HARQ identification information indicates failure and the received second HARQ identification information indicates success. data, and send the second PUSCH demodulated data to the core network device. 2. The system according to claim 1, wherein the first base station is further configured to send the first PUSCH demodulated data to the core network when the first HARQ identification information indicates success equipment. 3. The system according to claim 2, wherein the first base station is configured to receive all the second HARQ identifiers sent by the second base station when the first HARQ identifier information is marked as failure When the information is marked as failure, the soft bit information of the at least one second base station is obtained, and after the local soft bit information and the soft bit information of the at least one second base station are successfully combined, the combined data is sent to The core network device. 4. The system according to claim 3, wherein the first base station is further configured to acquire the next soft bit information of the second base station, and after the local soft bit information is successfully combined with the soft bit information of the next second base station, the combined data is sent to the core network device. 5. The system according to any one of claims 1 to 4, wherein the first base station is further configured to, after demodulating the uplink data, obtain the first physical uplink control channel PUCCH demodulation information; the at least one second base station is further configured to, after demodulating the uplink data, obtain second PUCCH demodulation information, and send the second PUCCH demodulation information to the the first base station; The first base station is further configured to, after receiving the second PUCCH demodulation information sent by the at least one second base station through the Ethernet link, combine the first PUCCH demodulation information and the second PUCCH demodulation information. The PUCCH demodulates information to obtain scheduling information, and performs uplink scheduling according to the scheduling information after receiving the uplink data again. 6. The system according to claim 5, wherein the core network device is configured to send downlink data to the first base station; The first base station is configured to receive the downlink data sent by the core network equipment, perform downlink scheduling according to the scheduling information, and send the downlink data to the at least one a second base station, and sending the downlink data to the terminal through the air interface; The at least one second base station is configured to receive the downlink data sent by the first base station through the Ethernet link, and send the downlink data to the terminal through the air interface; The terminal is configured to receive the downlink data sent by the first base station and the at least one second base station through the air interface. 7. A data transmission method based on a super cell, comprising: The first base station receives the uplink data sent by the terminal, and demodulates the uplink data to obtain first physical uplink shared channel PUSCH demodulation data and first hybrid automatic repeat request HARQ identification information; receiving second HARQ identification information sent by at least one second base station through an Ethernet link; When the first HARQ identification information indicates failure and the second HARQ identification information indicates success, obtain the second PUSCH demodulation data buffered by the at least one second base station through the Ethernet link, and transfer the The second PUSCH demodulated data is sent to the core network device, wherein the second HARQ identification information and the second PUSCH demodulated data are obtained by demodulating the received uplink data by the at least one second base station. 8. The method according to claim 7, wherein when the first HARQ identification information is marked as failure and all received second HARQ identification information sent by the second base station are marked as failure, obtaining The soft bit information of the at least one second base station, and after the local soft bit information and the soft bit information of the at least one second base station are successfully combined, send the combined data to the core network device. 9. The method according to claim 8, wherein after failing to combine the local soft bit information with the soft bit information of the at least one second base station, acquiring the soft bit information of the next second base station, and After the local soft bit information is successfully combined with the soft bit information of the next second base station, the combined data is sent to the core network device. 10. A data transmission method based on a super cell, comprising: The second base station receives the uplink data sent by the terminal, and demodulates the uplink data to obtain second physical uplink shared channel PUSCH demodulation data and second hybrid automatic repeat request HARQ identification information; Buffering the second PUSCH demodulation data, and sending the second HARQ identification information to the first base station through the Ethernet link; When the first base station determines that the first HARQ identification information obtained according to the demodulation of the uplink data is marked as failed and the second HARQ identification information is marked as successful, the buffered first HARQ identification information is marked as successful through the Ethernet link. The two PUSCH demodulated data are sent to the first base station.