CN108777875B

CN108777875B - Service processing method and device

Info

Publication number: CN108777875B
Application number: CN201810490951.XA
Authority: CN
Inventors: 付永魁; 朱宇霞
Original assignee: Wuhan Hongxin Technology Development Co Ltd
Current assignee: Wuhan Hongxin Technology Development Co Ltd
Priority date: 2018-05-21
Filing date: 2018-05-21
Publication date: 2021-06-29
Anticipated expiration: 2038-05-21
Also published as: CN108777875A

Abstract

The invention provides a service processing method applied to a railway train-ground wireless communication system, wherein all cells of the system have the same physical cell ID; the method comprises the following steps: when the vehicle-mounted terminal is in a coverage range of a first Radio Remote Unit (RRU), confirming a second RRU which the vehicle-mounted terminal is about to enter; if the first RRU and the second RRU are respectively connected with different service processing devices, establishing a data exchange link for the first service processing device connected with the first RRU and the second service processing device connected with the second RRU; establishing a user context of the vehicle-mounted terminal in the second service processing device, and setting the first service processing device to carry out merging transmission on data; and when the signal of the vehicle-mounted terminal received by the first RRU is weaker and the signal of the vehicle-mounted terminal received by the second RRU is stronger, setting the second service processing device to carry out combined transmission on the data. By the technical scheme, the temporary cell switching can be avoided in the moving process of the vehicle-mounted terminal, and the service continuity is ensured.

Description

Service processing method and device

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a service processing method and apparatus.

Background

The railway vehicle-ground wireless communication system is a railway-dedicated mobile communication system and is used for transmitting various vehicle-ground communication service data in railway transportation and meeting the industry requirements of the railway transportation. Many companies are currently considering the use of LTE technology for a new generation of railroad car-to-ground wireless communication systems. If the conventional LTE technology is adopted, the train must be switched once every 3s-7s on average when moving at a high speed of 300km, thereby greatly increasing the probability of switching failure and call drop and bringing great difficulty to the network optimization work. And at the switching position of the edge of the LTE cell, the data flow is obviously reduced, and the overall throughput is seriously influenced by frequent switching.

In the prior art, the number of cells is reduced by combining adjacent cells, so that the cell switching times in a railway train-ground wireless communication system are reduced, the switching failure and call drop probability caused by cell switching are reduced, and the cell switching times are reduced to improve the system throughput. For example, as shown in fig. 1, each Radio Remote Unit (RRU) under a Base Band Unit (BBU) of the same Base station in a railway vehicle-ground wireless communication system performs cell merging, so that a train does not need to perform cell switching in a coverage area of each RRU under one BBU, thereby reducing the number of cell switching times during the operation of the train. However, the above processing method only reduces the number of times of cell switching of the train in the coverage of one BBU, and when the train moves across different BBUs, cell switching is still required, and service continuity cannot be strictly ensured.

Disclosure of Invention

Based on the defects and shortcomings of the prior art, the invention provides a service processing method which can strictly ensure service continuity.

A business processing method is applied to a railway vehicle-ground wireless communication system, and all cells of the railway vehicle-ground wireless communication system have the same physical cell ID; the method comprises the following steps:

when the vehicle-mounted terminal is in the coverage range of the first remote radio unit, confirming a second remote radio unit which the vehicle-mounted terminal is about to enter according to the position and the moving direction of the vehicle-mounted terminal;

if the first remote radio unit and the second remote radio unit are respectively connected with different service processing devices, establishing a data exchange link for the first service processing device connected with the first remote radio unit and the second service processing device connected with the second remote radio unit, and deleting a redundant data exchange link existing in the first service processing device; the different service processing devices comprise different baseband processing units or different baseband processing boards of the same baseband processing unit;

establishing a user context of the vehicle-mounted terminal in the second service processing device, and setting the first service processing device to carry out merging transmission on data transmitted by the first remote radio unit and the second remote radio unit;

and when the signal of the vehicle-mounted terminal received by the first remote radio unit is smaller than a first threshold value and the signal of the vehicle-mounted terminal received by the second remote radio unit is larger than a second threshold value, setting the second service processing device to carry out merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit.

Optionally, when the second service processing apparatus performs combined transmission on the data transmitted by the first remote radio unit and the second remote radio unit, the method further includes:

and when the signal of the vehicle-mounted terminal received by the first remote radio unit continuously becomes poor and is smaller than a third threshold value, deleting a data exchange link established between the first service processing device and the second service processing device, and deleting the user context of the vehicle-mounted terminal in the first service processing device.

Optionally, the establishing a data exchange link for a first service processing device connected to the first radio remote unit and a second service processing device connected to the second radio remote unit includes:

establishing a data exchange link for a first baseband processing board connected with the first radio remote unit and a second baseband processing board connected with the second radio remote unit;

the setting of the first service processing apparatus to perform merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit includes:

setting the first baseband processing board to perform physical layer or data link layer combination processing and transmission processing on the data transmitted by the first remote radio unit and the second remote radio unit;

the setting of the second service processing apparatus to perform merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit includes:

and the second baseband processing board is arranged to carry out physical layer or data link layer combination processing and transmission processing on the data transmitted by the first remote radio unit and the second remote radio unit.

establishing a data exchange link for a first main control processing board of a first baseband processing unit connected with the first radio remote unit and a second main control processing board of a second baseband processing unit connected with the second radio remote unit;

wherein, the setting the first service processing device to perform merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit includes:

setting the first main control processing board to carry out data link layer merging processing and transmission processing on data transmitted by the first remote radio unit and the second remote radio unit;

and setting the second main control processing board to perform data link layer merging processing and transmission processing on the data transmitted by the first remote radio unit and the second remote radio unit.

Optionally, after the second service processing apparatus is configured to perform combined transmission on the data transmitted by the first remote radio unit and the second remote radio unit, the method further includes:

confirming a third radio remote unit which is about to enter by the vehicle-mounted terminal according to the position and the moving direction of the vehicle-mounted terminal;

if the third remote radio unit and the second remote radio unit are respectively connected with different service processing devices, establishing a data exchange link for the third service processing device connected with the third remote radio unit and the second service processing device connected with the second remote radio unit, and establishing a user context of the vehicle-mounted terminal in the third service processing device; the different service processing devices comprise different baseband processing units or different baseband processing boards of the same baseband processing unit;

when the signal of the vehicle-mounted terminal received by the second remote radio unit is smaller than a first threshold value and the signal of the vehicle-mounted terminal received by the third remote radio unit is larger than a second threshold value, setting the third service processing device to carry out merging transmission on the data transmitted by the second remote radio unit and the third remote radio unit;

and if the established data exchange link exists between the first service processing device and the second service processing device, deleting the existing data exchange link and deleting the user context of the vehicle-mounted terminal in the first service processing device.

A service processing method is applied to a baseband processing board in a baseband processing unit of a railway train-ground wireless communication system, and comprises the following steps:

receiving data sent by a first remote radio unit connected with the baseband processing board, and receiving data sent by a second remote radio unit connected with the baseband processing board of an adjacent baseband processing unit; wherein a data exchange link exists between the baseband processing board and the baseband processing board of the adjacent baseband processing unit;

performing physical layer or data link layer merging processing on the data sent by the first remote radio unit and the data sent by the second remote radio unit;

and carrying out uplink transmission on the data obtained by the merging processing.

Optionally, the method further includes:

receiving downlink data;

analyzing the downlink data to obtain data sent to the first remote radio unit and data sent to the second remote radio unit;

and sending the data sent to the first remote radio unit, and sending the data sent to the second remote radio unit to a baseband processing board connected with the second remote radio unit, so that the baseband processing board connected with the second remote radio unit sends the data sent to the second remote radio unit.

Optionally, the method further includes:

determining the radio remote unit cell of each existing user controlled by the baseband processing board;

for each remote radio unit cell with the user, respectively executing the following operations:

determining all radio remote unit cells with different users adjacent to the radio remote unit cell with the user;

and allocating non-overlapping time-frequency resources for the radio remote unit cell with the user and all the radio remote unit cells with different users adjacent to the radio remote unit cell with the user.

A service processing method is applied to a main control processing board in a baseband processing unit of a railway vehicle-ground wireless communication system, and comprises the following steps:

receiving data processed by the baseband processing board and sent by a first remote radio unit connected with the baseband processing unit where the main control processing board is located, and receiving data processed by the baseband processing board and sent by a second remote radio unit connected with an adjacent baseband processing unit; wherein, a data exchange link exists between the main control processing board and the main control processing board of the adjacent baseband processing unit;

performing data link layer merging processing on the data sent by the first remote radio unit and the data sent by the second remote radio unit;

and carrying out uplink transmission on the combined data.

Optionally, the method further includes:

receiving downlink data;

and sending the data sent to the first remote radio unit, and sending the data sent to the second remote radio unit to a main control processing board managing the second remote radio unit, so that the main control processing board managing the second remote radio unit sends the data sent to the second remote radio unit.

Optionally, the method further includes:

determining the radio remote unit cell of each existing user controlled by the main control processing board;

and allocating non-overlapping time-frequency resources for the radio remote unit cell with the user and the radio remote unit cells with different users adjacent to the radio remote unit cell with the user.

A business processing device is applied to a railway vehicle-ground wireless communication system, and all cells of the railway vehicle-ground wireless communication system have the same physical cell ID; the device comprises:

the system comprises a position management unit, a first remote radio unit and a second remote radio unit, wherein the position management unit is used for confirming a second remote radio unit which the vehicle-mounted terminal is about to enter according to the position and the moving direction of the vehicle-mounted terminal when the vehicle-mounted terminal is in the coverage range of the first remote radio unit;

a data link management unit, configured to establish a data exchange link for a first service processing device connected to the first radio remote unit and a second service processing device connected to the second radio remote unit, and delete a redundant data exchange link existing in the first service processing device, when the first radio remote unit and the second radio remote unit are connected to different service processing devices, respectively; the different service processing devices comprise different baseband processing units or different baseband processing boards of the same baseband processing unit;

the first setting unit is used for establishing the user context of the vehicle-mounted terminal in the second service processing device and setting the first service processing device to carry out merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit;

and the second setting unit is configured to set the second service processing device to perform merging transmission on the data transmitted by the first radio remote unit and the second radio remote unit when the signal of the vehicle-mounted terminal received by the first radio remote unit is smaller than a first threshold and the signal of the vehicle-mounted terminal received by the second radio remote unit is larger than a second threshold.

A service processing device is applied to a baseband processing board in a baseband processing unit of a railway train-ground wireless communication system, and comprises the following components:

the first data transceiver unit is used for receiving data sent by a first remote radio unit connected with the baseband processing board and data sent by a second remote radio unit connected with the baseband processing board of an adjacent baseband processing unit; receiving processed data sent by a first data processing unit and sending the processed data to a first remote radio unit connected with the baseband processing board and a second remote radio unit connected with the baseband processing board of an adjacent baseband processing unit; receiving processed data sent by a first data processing unit of a baseband processing board in an adjacent baseband processing unit and sending the processed data to a radio remote unit connected with the first data processing unit; wherein a data exchange link exists between the baseband processing board and the baseband processing board of the adjacent baseband processing unit;

and the first data processing unit is used for performing physical layer or data link layer combination processing on the data sent by the first remote radio unit and the data sent by the second remote radio unit, and performing downlink sending processing on the data sent by the main control processing board where the baseband processing board is located.

A service processing device is applied to a main control processing board in a baseband processing unit of a railway vehicle-ground wireless communication system, and comprises:

the second data transceiver unit is used for receiving the data processed by the baseband processing board and sent by the first radio remote unit connected with the baseband processing unit where the main control processing board is located and the data processed by the baseband processing board and sent by the second radio remote unit connected with the adjacent baseband processing unit; receiving processed data sent by a second data processing unit and sending a baseband processing board connected with the first remote radio unit and a baseband processing board in an adjacent baseband processing unit connected with the second remote radio unit; wherein, a data exchange link exists between the main control processing board and the main control processing board of the adjacent baseband processing unit;

and the second data processing unit is used for performing data link layer combination processing on the data which is sent by the first remote radio unit and processed by the baseband processing board and the data which is sent by the second remote radio unit and processed by the baseband processing board, and performing downlink sending processing on the service data.

The invention sets all cell IDs in the railway vehicle-ground wireless communication system to be the same ID, which is equivalent to that the whole railway vehicle-ground wireless communication system has only one cell. And in the moving process of the vehicle-mounted terminal, when the vehicle-mounted terminal is in the coverage range of the first RRU, judging a second RRU which the vehicle-mounted terminal is about to enter in advance. If the first RRU and the second RRU are respectively connected with different service processing devices, a data exchange link is established for the first service processing device connected with the first RRU and the second service processing device connected with the second RRU, and a vehicle-mounted terminal context is established in the second service processing device. And in the moving process of the vehicle-mounted terminal, the first service processing device or the second service processing device is flexibly arranged to carry out combined transmission on the data transmitted by the first RRU and the second RRU. The process realizes the selection of the service processing device in advance in the moving process of the vehicle-mounted terminal and the establishment of the user context in advance, avoids the temporary execution of cell switching in the moving process of the vehicle-mounted terminal and ensures the service continuity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic topological diagram of a railway vehicle-ground wireless communication system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an access network architecture of a railway vehicle-ground wireless communication system according to an embodiment of the present invention;

FIG. 3 is a schematic topology diagram of another railway train-ground wireless communication system provided by an embodiment of the invention;

fig. 4 is a flowchart illustrating a service processing method according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a baseband data combining principle provided by an embodiment of the present invention;

fig. 6 is a schematic view of a railway train-ground wireless communication system scenario provided in an embodiment of the present invention;

FIG. 7 is a schematic diagram of another railway train-ground wireless communication system scenario provided by an embodiment of the invention;

fig. 8 is a flowchart illustrating another service processing method according to an embodiment of the present invention;

fig. 9 is a flowchart illustrating a further service processing method according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a service processing apparatus according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another service processing apparatus provided in an embodiment of the present invention;

fig. 12 is a schematic structural diagram of another service processing apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention discloses a service processing method, in particular to a railway vehicle-ground wireless communication service processing method applied to a railway vehicle-ground wireless communication system.

Specifically, the architecture of the railway vehicle-ground wireless communication system applied in the embodiment of the present invention is shown in fig. 2, and includes a plurality of baseband device pools connected to a front-end transmission network and a backhaul transmission network, each baseband device pool includes a main control processing board and a baseband processing board, and the baseband processing board extends out of a radio remote unit RRU.

In fig. 2, a transmission module in the main control processing board may undertake part of the air interface layer 2 protocol processing (for example, PDCP layer of LTE) or even all of the air interface layer 2 protocol processing functions according to the service division of the main control processing board and the baseband processing board. The baseband data exchange interface is finally connected with the baseband device pool controller; the S1/X2 interface is connected with core network equipment or other base stations. The baseband device pool controller degenerates to an inter-BBU baseband data interconnect switching device in the case of a BBU (i.e., the baseband device in fig. 2) non-pooled application scenario (i.e., there is only one BBU for one site).

In order to ensure that the vehicle-mounted terminal does not perform cell handover in the process of moving in the railway vehicle-ground wireless communication system, as shown in fig. 3, in the embodiment of the present invention, each physical cell through which the vehicle-mounted terminal passes is set to have the same Physical Cell Identifier (PCI), that is, all cells of the railway vehicle-ground wireless communication system are set to have the same physical cell ID. Through the above arrangement, the entire network shown in fig. 3 becomes a single-frequency-point single-PCI network. It is noted that, in order to ensure reliability, high-speed railway coverage usually employs at least two frequency point coverage. In addition, base station identities of different Base Stations (BBUs) are different, and corresponding cell global identities cgi (cellglobal id) are also different.

Based on the above setting, referring to fig. 4, a service processing method disclosed in the embodiment of the present invention includes:

s401, when the vehicle-mounted terminal is located in the coverage range of the first remote radio unit, confirming a second remote radio unit which the vehicle-mounted terminal is about to enter according to the position and the moving direction of the vehicle-mounted terminal;

specifically, when the embodiment of the present invention is configured, in a moving process of the vehicle-mounted terminal, when the vehicle-mounted terminal is located in a coverage area of a certain remote radio unit RRU, that is, in a coverage area of a first RRU, according to vehicle-mounted terminal position information output by the positioning device on the vehicle and a moving direction of the vehicle-mounted terminal, in combination with an RRU distribution situation in the railway vehicle-ground wireless communication system, a next RRU, that is, a second RRU, that the vehicle-mounted terminal is to enter is determined.

It can be understood that, when the vehicle-mounted terminal is within the coverage of the first RRU, the communication data of the vehicle-mounted terminal is processed and transmitted by the first RRU and a service processing device (e.g., a baseband processing board in a baseband processing unit) connected to the first RRU.

If the first remote radio unit and the second remote radio unit are connected to different service processing devices, step S402 is executed to establish a data exchange link for the first service processing device connected to the first remote radio unit and the second service processing device connected to the second remote radio unit, and delete a redundant data exchange link existing in the first service processing device; the different service processing devices comprise different baseband processing units or different baseband processing boards of the same baseband processing unit;

specifically, if the first RRU and the second RRU are connected to the same service processing apparatus (like a baseband processing unit or the same baseband processing board), the service processing apparatus can perform data processing on the first RRU and the second RRU according to the processing in the prior art, so as to avoid performing cell switching processing when the vehicle-mounted terminal crosses over the first RRU and the second RRU.

If the first RRU and the second RRU are connected to different service processing apparatuses, respectively, in the embodiment of the present invention, a data exchange link is established for the first service processing apparatus connected to the first RRU and the second service processing apparatus connected to the second RRU, that is, a communication connection is established for the service processing apparatus between the two RRUs, so as to implement data interaction.

The different service processing devices may be different base processing units BBUs to which the first RRU and the second RRU are respectively connected, different baseband processing boards BPUs in the same baseband processing unit BBU to which the first RRU and the second RRU are respectively connected, or different upper layer data processing devices to which the first RRU and the second RRU are respectively connected.

S403, establishing a user context of the vehicle-mounted terminal in the second service processing device, and setting the first service processing device to perform merging transmission on data transmitted by the first remote radio unit and the second remote radio unit;

specifically, after a data exchange link is established for a first service processing device connected to a first RRU and a second service processing device connected to a second RRU, the embodiment of the present invention further establishes a user context of the vehicle-mounted terminal in the second service processing device. It can be understood that, after the user context of the vehicle-mounted terminal exists in the second service processing device, when the vehicle-mounted terminal enters the coverage area of the second service processing device, the data communication can be directly performed by using the user context of the vehicle-mounted terminal.

At this time, the vehicle-mounted terminal is mainly located in the coverage area of the first RRU, that is, in the service area of the first service processing device, and most of the data is from the first RRU, so that the embodiment of the present invention sets that the first service processing device performs combined transmission on the data transmitted by the first RRU and the data transmitted by the second RRU at this time. That is, the data transmitted by the second RRU is transmitted to the first service processing apparatus through the data exchange link between the first service processing apparatus and the second service processing apparatus, and is processed by the first service processing apparatus in a unified manner.

After receiving the data transmitted by the first RRU and the data transmitted by the second RRU, the first service processing apparatus performs merging transmission on the data of the first RRU and the data of the second RRU, mainly performs uplink data merging.

On the other hand, when the data exchange link is established between the first service processing device and the second service processing device and after the user context established in the second service processing device, if the movement route of the vehicle-mounted terminal changes sharply and does not enter the coverage of the second service processing device, the data exchange link established between the first service processing device and the second service processing device and the user context established in the second service processing device need to be deleted in time.

Specifically, it is assumed that when a train enters the overlapping coverage range of the first RRU and the second RRU, a data exchange link between a first service processing device connected to the first RRU and a second service processing device connected to the second RRU should be established, and a vehicle-mounted user context is established inside the second service processing device according to the technical solution of the embodiment of the present invention. However, the train does not necessarily enter the coverage area of the second RRU, and the train may turn around or stop and turn around, but enter the coverage area of another RRU adjacent to the first RRU, and at this time, a data exchange link should be established between the first service processing apparatus and another adjacent service processing apparatus and a user context should be established in advance according to the technical solution of the embodiment of the present invention. At this time, the user context previously established in the second service processing device and the data exchange link established between the first service processing device and the second service processing device do not play a practical role although they are established in advance according to the technical solution of the embodiment of the present invention, and therefore the data exchange link established between the first service processing device and the second service processing device and the user context established in the second service processing device should be deleted.

When the signal of the vehicle-mounted terminal received by the first remote radio unit is smaller than a first threshold and the signal of the vehicle-mounted terminal received by the second remote radio unit is larger than a second threshold, step S404 is executed to set the second service processing device to perform merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit.

Specifically, as the vehicle-mounted terminal moves from the first RRU to the second RRU, the signal strength of the first RRU received by the vehicle-mounted terminal is weaker and weaker, and conversely, the signal strength of the second RRU received by the vehicle-mounted terminal is stronger and stronger, and most of data is transmitted through the second RRU. In the embodiment of the present invention, when the vehicle-mounted terminal detects that the signal intensity of the first RRU is smaller than the first threshold and the signal intensity of the second RRU is greater than the second threshold, the service processing device for data processing and transmission is converted, that is, the second service processing device is configured to perform combined transmission on the data transmitted by the first RRU and the second RRU.

In a conventional common cell processing method, a certain baseband board (the baseband board is an anchor baseband board, and a corresponding BBU is an anchor BBU) is responsible for processing data of all RRU cells through baseband data exchange in or between base stations. Specifically, the method comprises the steps that the baseband board processes and generates downlink data of all RRU cells and forwards the downlink data to each RRU; and combining the uplink data of all the RRU cells on the baseband board, and then carrying out subsequent uplink baseband reception and other layers of processing.

For high speed railway lines of thousands of kilometers in length, the above method is currently difficult to implement. Calculating according to the coverage of one RRU cell for 1 kilometer, wherein at least 500 RRUs are needed for 1000 kilometers, and the processing capacity of the current baseband board cannot meet the requirement that one baseband board can simultaneously process RRU data of 500 cells.

In order to solve the above problem, in the embodiment of the present invention, in the moving process of the vehicle-mounted terminal, according to the position and the moving direction of the vehicle-mounted terminal, the anchor baseband board is selected in advance in real time by combining with the pre-configured network topology information, that is, which service processing apparatus is set in advance to perform the merging transmission on the data of each RRU. That is, as described above, when the vehicle-mounted terminal is located within the coverage area of the first RRU, the first service processing apparatus connected to the first RRU performs data merging transmission; when the vehicle-mounted terminal moves out of the coverage area of the first RRU and enters the coverage area of the second RRU, the second service processing device connected with the second RRU is changed to carry out data combination transmission, and the establishment of a data exchange link between the first service processing device and the second service processing device is completed in advance. In order to ensure continuous service when the vehicle-mounted terminal crosses different base stations or different base band processing boards of the same base station, clock synchronization between the base stations and the base band processing boards should be ensured, and the specific synchronization method can be realized by referring to the prior art.

In particular, in the description of the embodiment and the subsequent embodiments of the present invention, the service processing devices for data transmission selected by the vehicle-mounted terminal, such as the baseband processing board BPU, the baseband processing unit BBU, the main control processing board, and the like, are named as anchor service processing devices, such as the anchor BPU, the anchor BBU, the anchor main control processing board, and the like.

As can be seen from the above description, in the embodiments of the present invention, all cell IDs in the railway vehicle-ground wireless communication system are set to be the same ID, which is equivalent to that the whole railway vehicle-ground wireless communication system has only one cell. And in the moving process of the vehicle-mounted terminal, when the vehicle-mounted terminal is in the coverage range of the first RRU, judging a second RRU which the vehicle-mounted terminal is about to enter in advance. If the first RRU and the second RRU are respectively connected with different service processing devices, a data exchange link is established for the first service processing device connected with the first RRU and the second service processing device connected with the second RRU, and a vehicle-mounted terminal context is established in the second service processing device. And in the moving process of the vehicle-mounted terminal, the first service processing device or the second service processing device is flexibly arranged to carry out combined transmission on the data transmitted by the first RRU and the second RRU. The process realizes the selection of the service processing device in advance in the moving process of the vehicle-mounted terminal and the establishment of the user context in advance, avoids the temporary execution of cell switching in the moving process of the vehicle-mounted terminal and ensures the service continuity.

Optionally, another embodiment of the present invention further discloses that, when the second service processing apparatus performs combined transmission on data transmitted by the first radio remote unit and the second radio remote unit, and when the signal of the vehicle-mounted terminal received by the first radio remote unit continuously becomes worse and is smaller than a third threshold, the data exchange link established between the first service processing apparatus and the second service processing apparatus is deleted, and the user context of the vehicle-mounted terminal in the first service processing apparatus is deleted.

Specifically, when the vehicle-mounted terminal gradually enters the coverage area of the second RRU from the coverage area of the first RRU, the embodiment of the present invention adjusts the first service processing device connected to the first RRU to perform the combined transmission on the data transmitted by the first RRU and the second RRU, and changes the combined transmission on the data transmitted by the first RRU and the second RRU by the second service processing device connected to the second RRU.

The signal intensity of the first RRU received by the vehicle-mounted terminal can be continuously weakened along with the continuous forward movement of the vehicle-mounted terminal, when the vehicle-mounted terminal is completely separated from the coverage range of the first RRU, the signal intensity of the first RRU received by the vehicle-mounted terminal is already weak, no data is transmitted by the first RRU at the moment, and the context of a vehicle-mounted terminal user in a service processing device connected with the first RRU has no effect.

Therefore, in the embodiment of the present invention, when the vehicle-mounted terminal detects that the signal strength of the first RRU is continuously weakened and is smaller than the set third threshold, it indicates that the vehicle-mounted terminal has completely separated from the coverage of the first RRU, and at this time, the data exchange link between the first service processing apparatus connected to the first RRU and the second service processing apparatus connected to the second RRU is deleted, and the user context of the vehicle-mounted terminal in the first service processing apparatus is deleted. In the subsequent train-ground wireless communication process, the second RRU and the second service processing device connected with the second RRU can completely process the radio signal.

Therefore, according to the technical scheme of the embodiment of the invention, the useless data connection link is removed in time while the service processing device is set in advance to carry out data merging transmission in the advancing process of the vehicle-mounted terminal, so that the service continuity is ensured and the system complexity is reduced.

Optionally, another embodiment of the present invention further discloses that the establishing a data exchange link for a first service processing apparatus connected to the first radio remote unit and a second service processing apparatus connected to the second radio remote unit includes:

Specifically, because there are few vehicle-mounted terminals actually accessed within a coverage area of a certain base station in the railway vehicle-ground wireless communication system, in order to enable the base station to efficiently combine and transmit communication data, on the basis of traditional cell combination, the embodiment of the present invention adopts the following processing method:

the method of cell merging may be configurable, supporting either physical layer (layer 1) merging or data link layer (layer 2) merging.

The layer 1 combining may be radio frequency combining or baseband combining.

Radio frequency combining can raise noise floor but can reduce the amount of data transmitted by the IR interface. The baseband combining principle is shown in fig. 5 (taking LTE system as an example, note that the physical cell in the figure is an RRU cell), combining multi-antenna data can bring demodulation gain, and improve uplink demodulation performance, and the disadvantage is that a larger IR interface transmission bandwidth is occupied.

Layer 2 combining is typically implemented at the lower MAC layer. In this case, the baseband processing section does not care about the difference between the RRU cell and the logical cell, and performs the conventional processing similar to that in the case of the non-common cell according to the configuration of the control plane and the control of the MAC scheduler, and does not need to perform the multi-antenna data combination of the RRU cell in the uplink. The layer 2 combining baseband is relatively simple to implement because no uplink combining is needed, but the demodulation gain of multi-antenna combining cannot be obtained. In addition, the layer 2 combines the data after the baseband processing, and the data volume directly participating in the combination is greatly reduced compared with the combination of the multi-antenna data of the RRU cell.

For a railway wireless communication application scenario, when a train moves within the cell coverage area of two RRUs in a common cell, the train is usually closer to one RRU and farther from the other RRU. In this case, the two RRUs have different doppler shifts and opposite directions to be compensated for corresponding to RRU cells, which is particularly obvious in the case of high-speed movement, so that frequency correction needs to be performed for each RRU cell in the case of baseband combining, which increases the complexity of the system, and once there is an error in the frequency correction, the combining demodulation gain is limited.

Based on the description of the advantages and disadvantages of the cell merging method, the embodiment of the invention considers the merging of the configuration layer 2 for the occasions with better coverage of the high-speed railway or limited IR interface data transmission; for low speed and IR interface data transmission without bottlenecks, configuration layer 1 merging may be considered.

For layer 2 combining, in order to further reduce the impact of IR interface transmission limitation, L2 can be further put to the master processing board (currently at least the RLC and MAC layers are usually put on the baseband board to process) in case that the number of RRU cells combined by a single base station is small and the processing capability of the master processing board is sufficient.

That is, the configurable method of the co-cell combining may be layer 1 baseband combining, baseband processing board layer 2 combining, and main control processing board layer 2 combining.

In the case of layer 1 combining or baseband processing board layer 2 combining, it needs to determine which scheduler on the baseband processing board of that base station performs final uplink service combining and downlink service distribution, that is, it needs to anchor the baseband processing board (of course, it needs to determine the anchor base station at the same time); for the occasion of merging the main control processing board layer 2, only the main control processing board scheduler in which BBU is responsible for executing the final uplink service merging and downlink service distribution needs to be determined. At this time, the corresponding baseband processing board is an anchor baseband processing board, the corresponding base station is an anchor base station, the corresponding BBU is an anchor BBU, and the corresponding RRU is an anchor RRU.

The embodiment of the invention mainly introduces a processing process of data merging by a baseband processing board. As can be seen from the above description, the data merging performed by the baseband processing board includes the physical layer merging or the data link layer merging performed by the baseband processing board on the data.

It can be understood that, when the baseband processing board performs data merging transmission, the baseband processing board serves as a service processing device, and in the technical solution of the embodiment of the present invention, a data exchange link is established for a first service processing device connected to the first radio remote unit and a second service processing device connected to the second radio remote unit, specifically, a data exchange link is established for a first baseband processing board connected to the first radio remote unit and a second baseband processing board connected to the second radio remote unit.

At this time, the first service processing device is configured to perform merging transmission on the data transmitted by the first remote radio unit and the second remote radio unit, specifically, the first baseband processing board is configured to perform physical layer or data link layer merging processing and transmission processing on the data transmitted by the first remote radio unit and the second remote radio unit;

the second service processing device is configured to perform merging transmission on data transmitted by the first remote radio unit and the second remote radio unit, specifically, the second baseband processing board is configured to perform physical layer or data link layer merging processing and transmission processing on the data transmitted by the first remote radio unit and the second remote radio unit.

The above process represents the process of dynamically selecting the anchor baseband processing board in the moving process of the vehicle-mounted terminal.

If the combining capability of the RRU cells of one baseband board is set to be n, two RRU cells at the edge of the coverage area may be used for dynamic combining, and the number of RRU cells participating in fixed combining is n-2. For example, as shown in fig. 6, when a train moves along a railway line, the corresponding anchoring base band plate located in one base station is numbered BPU₁～BPU_mThe RRUs connected with each base band plate are arranged along a railway lineThe numbers are 1 to n. Then the RRU corresponding to BPU1 is RRU_1,1～RRU_1,nThe RRU corresponding to the BPU2 is an RRU_2,1～RRU_2,n,…,BPU_mThe corresponding RRU is RRU_m,1～RRU_m,n. RRU at the edge of the coverage range of the baseband board is RRU_1,1，RRU_1,n，RRU_2,1，RRU_2，n…RRU_m,1,RRU_m,nThe data of these RRUs may be processed by the baseband board connected to itself or handed to the adjacent anchor baseband board for processing.

For example, in fig. 6, when the train moves to the RRU_1，nAnd RRU_2,1The position of the cover, where the baseband processing board is anchored right from the beginning, is the BPU₁The anchor RRU is RRU_1,nSince the next direction of movement is by the BPU₂Connected RRU_2,1Covered, therefore, the RRU needs to be put in advance_2,1Corresponding BPU₂In-board baseband data switch, in-board baseband data switching module for master control processing, and BPU₁The in-board baseband data switch sets the switching relationship, i.e., for the BPU₁And BPU₂The data exchange link is set up. Since the baseband module, the L2 processing module and the IR interface processing module are also hung on the baseband board data switch, as long as the path configuration is normal, the BPU₁And BPU₂Various types of baseband data can be flexibly exchanged therebetween.

For example, if the configured combining algorithm is layer 1 baseband combining, RRU is in the uplink direction_2,1The baseband data carried by the uplink IR interface data can be handed over to the BPU via the above path₁The baseband modules of (A) perform a combining process, i.e. BPU₁The RRU combined in the uplink is not necessarily directly connected to the board; BPU if the configured merging algorithm is baseband processing board layer 2 merging₁The MAC scheduler in the inner L2 processing module may schedule reception from the RRU_2,1And passes through the BPU₂Decoding data processed by the baseband module are combined and then processed by each layer such as RLC, etc., because the baseband processing and BPU are needed at this time₂The baseband module in the system has to have the user context corresponding to the vehicle-mounted terminal, and for convenient processing, the exchange relationship is preset and the BPU is carried out at the same time₂The user context of the terminal is established. As the train moves further, when the slave RRU is moved further_1,nThe weaker the data signal received (by detecting the uplink Sounding Reference Signal (SRS) of the terminal and comparing with the set threshold), the BPU₂The anchor point baseband processing board upgraded to the terminal is combined and transmitted according to the method, and the BPU₁And BPU₂The data channel between will be deleted, deleting the BPU at the same time as deleting the channel₁The user context of the vehicle-mounted terminal.

Optionally, another embodiment of the present invention further discloses that the establishing a data exchange link for a first service processing apparatus connected to the first remote radio unit and a second service processing apparatus connected to the second remote radio unit includes:

Specifically, the embodiment of the invention discloses a processing process of dynamically selecting an anchor point base station, namely dynamically anchoring an anchor point main control processing board, and realizing data merging and transmission by using the main control processing board when a vehicle-mounted terminal crosses adjacent base stations.

At this time, the data is merged at the MAC layer, i.e., the data link layer (L2 layer), and the L2 module (including the MAC scheduler) is placed in the master processing board for centralized processing.

Referring to fig. 7, the direction of movement of the train is from the RRU cell coverage served by BBU1 to the RRU cell coverage served by BBU 2. When the BBU of the anchor base station is the BBU1, the control module determines that the BBU2 may be the next possible anchor BBU according to the moving direction of the vehicle-mounted terminal and the pre-configuration, and establishes the context of the vehicle-mounted terminal in the BBU2, and at the same time establishes the data channel of the L2 module in the BBU1, the baseband data exchange module in the main control processing board, the baseband data exchange module in the baseband device pool controller, the baseband data exchange module in the BBU2, the BPU1 baseband data switch in the BBU2, and the baseband module. An L2 module (specifically a MAC scheduler) within the BBU1 can schedule the BPU1 of the BBU2 over the connected RRU_1,1The in-vehicle terminal data is transmitted and received, but the final location of the combination is in the L2 module of the BBU 1. When BBU1 detects that the base station is connected to RRU as the train moves further_1，nThe received signal of the vehicle-mounted terminal is weaker and weaker, and the RRU connected with the BBU2 is detected at the same time_1,1And if the received signal of the vehicle-mounted terminal is stronger and stronger, transferring the anchor base station into the BBU2, deleting the user context and the data channel of the vehicle-mounted terminal in the BBU1, and anchoring the RRUs adjacent to the BBUs 3 and the BBU2 to the BBU2 for merging processing when the vehicle-mounted terminal further moves to a position where the BBU2 and the next base station (if the corresponding BBU is the BBU3) are overlapped in a covering manner. And as the method based on the base band board anchoring, whether the anchor point BBU is replaced, the user context in the original anchor point BBU is deleted and the corresponding base band service switching path between the BBUs is removed is determined by detecting the strength and the quality of the SRS of the vehicle-mounted terminal on each RRU and comparing the detected strength and the quality with a set threshold.

Optionally, another embodiment of the present invention further discloses that, after the second service processing apparatus is configured to perform combined transmission on the data transmitted by the first remote radio unit and the second remote radio unit, the method further includes:

Specifically, the technical solution disclosed in the embodiment of the method shown in fig. 4 is the same as that disclosed in the embodiment of the method shown in fig. 4, and the technical solution disclosed in the embodiment of the present invention is further intended to explain that, when the coverage of the second remote radio unit enters the coverage of the third remote radio unit along with the traveling of the vehicle-mounted terminal, the data link establishment and the selection of the anchor point service processing device are performed in advance with reference to the processing procedure when the coverage of the first remote radio unit enters the coverage of the second remote radio unit. For a detailed processing procedure, please refer to the above embodiments, which will not be described in detail.

As is clear from the above description, the service processing method provided in the embodiment of the present invention anchors the baseband processing board of the baseband processing unit or the main control processing board of the base station in time during the traveling process of the vehicle-mounted terminal, and implements data merging and transmission when the vehicle-mounted terminal crosses the cell by using the baseband processing board or the main control processing board.

The above embodiments mainly describe the process of establishing a data exchange link and anchoring the baseband processing board of the baseband processing unit or the main control processing board of the base station by the vehicle-mounted terminal. Correspondingly, the embodiment of the invention also discloses a service processing method of the baseband processing board applied to the baseband processing unit.

Referring to fig. 8, a service processing method of a baseband processing board in a baseband processing unit applied to a railway train-ground wireless communication system disclosed in the embodiment of the present invention includes:

s801, receiving data sent by a first remote radio unit connected to the baseband processing board, and receiving data sent by a second remote radio unit connected to a baseband processing board of an adjacent baseband processing unit; wherein a data exchange link exists between the baseband processing board and the baseband processing board of the adjacent baseband processing unit;

specifically, when the vehicle-mounted terminal is in the overlapping coverage area of the first RRU and the second RRU, a data exchange link is established between the baseband processing board connected to the first RRU and the baseband processing board connected to the second RRU, and the baseband processing board connected to the second RRU receives data from the second RRU and then sends the data to the baseband processing board connected to the first RRU.

S802, merging the data sent by the first remote radio unit and the data sent by the second remote radio unit by a physical layer or a data link layer;

and S803, performing uplink transmission on the data obtained by the merging processing.

Specifically, the baseband processing board connected to the first RRU performs a combination process of a physical layer (L1 layer) or a data link layer (L2 layer) on data sent by the first RRU and data sent by the baseband processing board connected to the second RRU.

If the configured combination algorithm is layer 1 baseband combination, RRU is arranged in the uplink direction_2,1The baseband data carried by the uplink IR interface data can be handed over to the BPU via the above path₁The baseband modules of (A) perform a combining process, i.e. BPU₁The RRU combined in the uplink is not necessarily directly connected to the board; BPU if the configured merging algorithm is baseband processing board layer 2 merging₁The MAC scheduler in the inner L2 processing module may schedule reception from the RRU_2,1And passes through the BPU₂And the decoded data processed by the baseband module are combined and then subjected to RLC and other layers.

Optionally, in another embodiment of the present invention, a processing procedure of the baseband processing board in the downlink data transmission is also disclosed. The embodiment of the invention discloses a service processing method of a baseband processing board in a baseband processing unit applied to a railway train-ground wireless communication system, which further comprises the following steps:

receiving downlink data;

Specifically, in the downlink data transmission process, when the baseband processing board receives downlink data, it first analyzes whether the downlink data is sent to the first RRU or the second RRU. If the data is sent to the first RRU, the data is directly sent to the first RRU connected with the baseband processing board; and if the data is sent to the second RRU, the baseband processing board sends the data sent to the second RRU to the baseband processing board connected with the second RRU, and the baseband processing board connected with the second RRU sends the data to the second RRU.

Optionally, in another embodiment of the present invention, it is further disclosed that the method includes:

Specifically, different from the conventional method, the embodiment of the present invention uses the linear distribution characteristic of the railway vehicle-ground wireless communication system to pre-configure RRUs that may be used by a vehicle-mounted terminal located in a certain RRU cell service range, and staggers possible interference from a time-frequency two-dimensional angle.

The MAC scheduler selects possible downlink sending RRUs and uplink receiving RRUs for each vehicle-mounted terminal, and it is noted that under the condition of railway linear distribution, each vehicle-mounted terminal can send and receive data with two RRUs at most simultaneously (the RRU of the type is a service RRU). The selective sending and receiving functions of the uplink and the downlink can be configured, and the switch control (the switch is defined as a capacity increasing switch) is adopted, so that the switch is only used when the capacity is required.

When the capacity boosting switch is turned on, the general scheduling principle is that an RRU cell established on a serving RRU of the vehicle-mounted terminal and an RRU cell established on an RRU (called a candidate RRU) that is about to enter and does not provide a service for the vehicle-mounted terminal cannot have resource collision (the resource collision means that different vehicle-mounted terminals use the same resource within a certain scheduling range).

The method comprises the following specific steps:

the scheduler controls the baseband module to measure the uplink signal of each vehicle-mounted terminal and determines the service RRU thereof so as to determine the position thereof;

the type of uplink signal is related to the specific technology body. For example, using LTE: when a user is accessed, measuring a preamble; when the user is successfully accessed, measuring an uplink SRS (at the moment, a vehicle-mounted terminal needs to be configured to send a full-bandwidth SRS so as to facilitate measurement);

determining candidate RRUs of each vehicle-mounted terminal according to pre-configured RRU geographic position information and the moving direction of the vehicle-mounted terminal;

the vehicle-mounted terminal is always in a connected state, and the moving direction of the vehicle-mounted terminal can be determined through historical anchor point RRU information and network topology configuration;

the scheduler allocates uplink and downlink resources to terminals within its control range.

The embodiment of the invention discloses a processing method for avoiding collision of each RRU cell of a baseband processing board when real-time data merging transmission is carried out by using an anchoring baseband board.

When the method is configured to use the anchor baseband board, the MAC scheduler is located in the baseband processing board, and the anchor baseband board controls each RRU cell, and the terminal resource allocation in the adjacent RRU cells should ensure that there is no possibility of collision, and at this time, whether there is a user in the corresponding RRU cell needs to be considered. The method comprises the following specific steps:

determining an RRU cell which is controlled by an anchor baseband board and has a user;

the method comprises the steps of controlling each RRU cell (defined as a reference cell) to which a user is attached (possibly, a certain vehicle-mounted terminal is covered by two RRU cells, and two RRUs can both receive and transmit data of the vehicle-mounted terminal), wherein the vehicle-mounted terminal is controlled by an anchor baseband board, counting the number of adjacent RRU cells with different users (at most two RRU cells are respectively arranged on the left and the right under the condition of railway linear coverage, and the users in the adjacent cells are different from the users in the reference RRU cell), calculating resources possibly used by the RRU cell (a simple method is to equally divide the resources between the cell and the adjacent RRU cells), and recording the positions of the allocated resources. Note that since the scheduler is located in the baseband board, if the adjacent RRU cell is controlled by another baseband board, it may not be able to know whether there is a user in the adjacent RRU cell in time at this time, and a possible method at this time is to adopt a resource partitioning policy configured in advance (for example, for LTE, the reference RRU cell and the adjacent RRU cell controlled by another baseband board each use the upper and lower part positions of the frequency domain, and 50 RBs under the condition of 20M bandwidth, thereby achieving the purpose of staggering the frequency domain positions);

scheduling users in each RRU cell which is controlled by the anchor baseband board and is attached with the users according to the allocated resources; at this time, the scheduling method is the same as the conventional scheduling method, except that the scheduling resources are limited.

The embodiment of the invention also discloses a service processing method of the main control processing board in the baseband processing unit applied to the railway vehicle-ground wireless communication system.

Referring to fig. 9, a service processing method of a main control processing board applied to a baseband processing unit of a railway vehicle-ground wireless communication system disclosed in the embodiment of the present invention includes:

s901, receiving data processed by the baseband processing board and sent by a first remote radio unit connected to a baseband processing unit where the main control processing board is located, and receiving data processed by the baseband processing board and sent by a second remote radio unit connected to an adjacent baseband processing unit; wherein, a data exchange link exists between the main control processing board and the main control processing board of the adjacent baseband processing unit;

specifically, when the vehicle-mounted terminal is in the overlapping coverage area of the first RRU and the second RRU, a data exchange link is established between the main control processing board managing the first RRU and the main control processing board managing the second RRU, and the main control processing board managing the second RRU receives data from the second RRU and then sends the data to the main control processing board managing the first RRU.

Referring to fig. 7, the direction of movement of the train is from the RRU cell coverage served by BBU1 to the RRU cell coverage served by BBU 2. When the BBU of the anchor base station is the BBU1, the control module determines that the BBU2 may be the next possible anchor BBU according to the moving direction of the vehicle-mounted terminal and the pre-configuration, and establishes the context of the vehicle-mounted terminal in the BBU2, and at the same time establishes the data channel of the L2 module in the BBU1, the baseband data exchange module in the main control processing board, the baseband data exchange module in the baseband device pool controller, the baseband data exchange module in the BBU2, the BPU1 baseband data switch in the BBU2, and the baseband module.

S902, performing data link layer merging processing on the data sent by the first remote radio unit and the data sent by the second remote radio unit;

and S903, performing uplink transmission on the merged data.

Specifically, an L2 module (specifically a MAC scheduler) within BBU1 can schedule BPU1 of BBU2 over the connected RRU 1_1,1The in-vehicle terminal data is transmitted and received, but the final location of the combination is in the L2 module of the BBU 1. That is, after the main control processing board managing the first RRU receives the data sent by the first RRU and the data sent by the second RRU, the data link layer (L2 layer) is merged, and the merged data is subjected to uplink transmission.

Optionally, another embodiment of the present invention further discloses that the method further includes:

receiving downlink data;

Specifically, in the downlink data transmission process, when the main control processing board receives downlink data, it first analyzes whether the downlink data is sent to the first RRU or the second RRU. If the data is sent to the first RRU, the data is directly sent to the first RRU managed by the main control processing board; if the data is sent to the second RRU, the main control processing board sends the data sent to the second RRU to the main control processing board managing the second RRU, and the main control processing board managing the second RRU sends the data to the second RRU.

Optionally, in another embodiment of the present invention, the method further includes:

Specifically, the embodiment of the invention discloses a processing method for avoiding collision of each RRU cell of a base station when real-time data merging transmission is carried out by using an anchoring base station mode.

When the mode of using the anchor base station is configured, the MAC scheduler is located in the main control processing board, the number of schedulable terminals is relatively large, the principle at this time is that each RRU cell controlled by the anchor base station, the terminal resource allocation in the adjacent RRU cells should ensure that there is no possibility of collision, and at this time, whether there is a user in the corresponding RRU cell needs to be considered. The method comprises the following specific steps:

determining an RRU cell which is controlled by an anchor point base station and has a user;

for each RRU cell to which a user is attached (possibly, a certain vehicle-mounted terminal is covered by two RRU cells, and both RRUs can receive and transmit data of the vehicle-mounted terminal), which is controlled by an anchor base station, counting the number of neighboring RRU cells in which different users exist (at most two, one on the left and one on the right, in the case of railway linear coverage, it is noted that users existing in the neighboring cells at this time should be different from users in the reference RRU cell), calculating resources that the RRU cell may use (a simple method is to equally divide resources between the cell and the neighboring RRU cell), and recording the allocated resource positions. Note that since the scheduler is located in the main control processing board, if the adjacent RRU cell is controlled by another base station, it cannot know whether the adjacent RRU cell has a user in real time, and a possible method at this time is to use a resource partitioning policy configured in advance (for example, for LTE, the reference RRU cell and the adjacent RRU cell controlled by another base station each use the upper and lower part positions of the frequency domain, and 50 RBs under the 20M bandwidth condition, so as to achieve the purpose of staggering the frequency domain positions);

and scheduling users in each RRU cell which is controlled by the anchor point base station and is attached with the users according to the allocated resources. At this time, the scheduling method is the same as the conventional scheduling method except that the scheduling resources may be limited.

By the method, all resources can be used by the vehicle-mounted terminal attached to the interior of the RRU cell without resource collision, so that the system capacity is improved.

The embodiment of the invention also discloses a service processing device, which is applied to the railway vehicle-ground wireless communication system, wherein all the cells of the railway vehicle-ground wireless communication system have the same physical cell ID; referring to fig. 10, the apparatus comprises:

the system comprises a position management unit 100, a first remote radio unit and a second remote radio unit, wherein the position management unit is used for confirming a second remote radio unit which the vehicle-mounted terminal is about to enter according to the position and the moving direction of the vehicle-mounted terminal when the vehicle-mounted terminal is in the coverage range of the first remote radio unit;

a data link management unit 110, configured to establish a data exchange link for a first service processing device connected to the first radio remote unit and a second service processing device connected to the second radio remote unit, and delete a redundant data exchange link existing in the first service processing device, when the first radio remote unit and the second radio remote unit are connected to different service processing devices, respectively; the different service processing devices comprise different baseband processing units or different baseband processing boards of the same baseband processing unit;

a first setting unit 120, configured to establish a user context of the vehicle-mounted terminal in the second service processing apparatus, and set the first service processing apparatus to perform merging transmission on data transmitted by the first remote radio unit and the second remote radio unit;

a second setting unit 130, configured to set the second service processing apparatus to perform merging transmission on the data transmitted by the first radio remote unit and the second radio remote unit when the signal of the vehicle-mounted terminal received by the first radio remote unit is smaller than a first threshold and the signal of the vehicle-mounted terminal received by the second radio remote unit is greater than a second threshold.

The embodiment of the invention discloses another service processing device, which is applied to a baseband processing board in a baseband processing unit of a railway train-ground wireless communication system, and as shown in fig. 11, the device comprises:

a first data transceiver unit 200, configured to receive data sent by a first remote radio unit connected to the baseband processing board and data sent by a second remote radio unit connected to a baseband processing board of an adjacent baseband processing unit; receiving processed data sent by a first data processing unit and sending the processed data to a first remote radio unit connected with the baseband processing board and a second remote radio unit connected with the baseband processing board of an adjacent baseband processing unit; receiving processed data sent by a first data processing unit of a baseband processing board in an adjacent baseband processing unit and sending the processed data to a radio remote unit connected with the first data processing unit; wherein a data exchange link exists between the baseband processing board and the baseband processing board of the adjacent baseband processing unit;

the first data processing unit 210 is configured to perform physical layer or data link layer combining processing on the data sent by the first remote radio unit and the data sent by the second remote radio unit, and perform downlink sending processing on the data sent from the main control processing board where the baseband processing board is located.

The embodiment of the present invention further discloses another service processing apparatus, which is applied to a main control processing board in a baseband processing unit of a railway train-ground wireless communication system, and as shown in fig. 12, the apparatus includes:

a second data transceiver unit 300, configured to receive data processed by the baseband processing board and sent by a first remote radio unit connected to the baseband processing unit where the main control processing board is located, and data processed by the baseband processing board and sent by a second remote radio unit connected to an adjacent baseband processing unit; receiving processed data sent by a second data processing unit and sending the processed data to a baseband processing board connected with the first remote radio unit and a main control processing board in an adjacent baseband processing unit connected with the second remote radio unit; wherein, a data exchange link exists between the main control processing board and the main control processing board of the adjacent baseband processing unit;

the second data processing unit 310 is configured to perform data link layer combination processing on the data processed by the baseband processing board and sent by the first remote radio unit and the data processed by the baseband processing board and sent by the second remote radio unit, and perform downlink sending processing on the service data.

Specifically, please refer to the content of the method embodiment for the specific working content of each unit in the embodiments of each service processing apparatus, which is not described herein again.

It should be noted that, when the first data processing unit 210 and the second data processing unit 310 perform scheduling processing on the service data, the foregoing method should be followed to achieve maximization of system capacity while avoiding resource collision.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A service processing method is characterized in that the service processing method is applied to a railway vehicle-ground wireless communication system, and all cells of the railway vehicle-ground wireless communication system have the same physical cell ID; the method comprises the following steps:

2. The method of claim 1, wherein when the second service processing apparatus performs the merged transmission on the data transmitted by the first remote radio unit and the second remote radio unit, the method further comprises:

3. The method of claim 1, wherein the establishing a data exchange link for a first service processing device connected to the first radio remote unit and a second service processing device connected to the second radio remote unit comprises:

4. The method of claim 1, wherein the establishing a data exchange link for a first service processing device connected to the first radio remote unit and a second service processing device connected to the second radio remote unit comprises:

5. The method according to claim 1, wherein after the second service processing apparatus is configured to perform the combining transmission on the data transmitted by the first remote radio unit and the second remote radio unit, the method further comprises:

6. A service processing method is applied to a baseband processing board in a baseband processing unit of a railway train-ground wireless communication system, and comprises the following steps:

allocating non-overlapping time-frequency resources for the radio remote unit cell of the existing user and all the radio remote unit cells of different users adjacent to the radio remote unit cell of the existing user;

receiving data sent by a first remote radio unit connected with the baseband processing board and data sent by a second remote radio unit connected with the baseband processing board of an adjacent baseband processing unit; wherein a data exchange link exists between the baseband processing board and the baseband processing board of the adjacent baseband processing unit;

performing physical layer or data link layer merging processing on the data sent by the first remote radio unit and the data sent by the second remote radio unit; and carrying out uplink transmission on the data obtained by the merging processing.

7. The method of claim 6, further comprising:

receiving downlink data;

8. A service processing method is applied to a main control processing board in a baseband processing unit of a railway vehicle-ground wireless communication system, and comprises the following steps:

allocating non-overlapping time-frequency resources for the radio remote unit cell of the existing user and the radio remote unit cells of different users adjacent to the radio remote unit cell of the existing user;

and carrying out uplink transmission on the combined data.

9. The method of claim 8, further comprising:

receiving downlink data;

10. A service processing device is applied to a railway vehicle-ground wireless communication system, wherein all cells of the railway vehicle-ground wireless communication system have the same physical cell ID; the device comprises:

11. A service processing device is characterized in that the service processing device is applied to a baseband processing board in a baseband processing unit of a railway train-ground wireless communication system, and the baseband processing board determines radio remote unit cells of various existing users controlled by the baseband processing board; for each remote radio unit cell with the user, respectively executing the following operations: determining all radio remote unit cells with different users adjacent to the radio remote unit cell with the user; allocating non-overlapping time-frequency resources for the radio remote unit cell of the existing user and all the radio remote unit cells of different users adjacent to the radio remote unit cell of the existing user; the device includes:

12. A service processing device is characterized in that the service processing device is applied to a main control processing board in a baseband processing unit of a railway train-ground wireless communication system, and the main control processing board determines radio remote unit cells of all existing users controlled by the main control processing board; for each remote radio unit cell with the user, respectively executing the following operations: determining all radio remote unit cells with different users adjacent to the radio remote unit cell with the user; allocating non-overlapping time-frequency resources for the radio remote unit cell of the existing user and the radio remote unit cells of different users adjacent to the radio remote unit cell of the existing user; the device includes:

the second data transceiver unit is used for receiving the data processed by the baseband processing board and sent by the first radio remote unit connected with the baseband processing unit where the main control processing board is located and the data processed by the baseband processing board and sent by the second radio remote unit connected with the adjacent baseband processing unit; receiving processed data sent by a second data processing unit and sending the processed data to a baseband processing board connected with the first remote radio unit and a baseband processing board in an adjacent baseband processing unit connected with the second remote radio unit; wherein, a data exchange link exists between the main control processing board and the main control processing board of the adjacent baseband processing unit;