CN109104210B

CN109104210B - Radio frequency remote method, device and system

Info

Publication number: CN109104210B
Application number: CN201710471771.2A
Authority: CN
Inventors: 李彪; 刘春�; 张晓奎
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-06-20
Filing date: 2017-06-20
Publication date: 2020-10-23
Anticipated expiration: 2037-06-20
Also published as: CN109104210A

Abstract

The invention discloses a radio frequency remote method, a device and a system.A Radio Remote Unit (RRU) is additionally arranged on the basis of the original coverage area of a base station system, the RRU is accessed to the original base station system by utilizing a radio bearer between UE and the base station system, and the RRU can be movably arranged or fixedly arranged according to actual needs to form complementation with the coverage area of the original base station system, supplement a coverage blind spot area and solve the problem of call drop after the UE enters the coverage blind spot area of the original base station system. The radio remote method comprises the following steps: a first Remote Radio Unit (RRU) receives a communication address sent by first User Equipment (UE), wherein the communication address is obtained after the first UE is accessed to a base station system; and according to the communication address, the first RRU establishes a new cell by using a radio bearer between the first UE and the base station system as a transmission link, wherein the base station system comprises a base station, a base band processing unit (BBU) and a second RRU.

Description

Radio frequency remote method, device and system

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a radio remote method, apparatus, and system.

Background

This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

An LTE (Long Time Evolution, Long term Evolution) Base station system is distributed, and is composed of a baseband processing Unit (BBU), a Radio Remote Unit (RRU), and a Base station (eNodeB), as shown in fig. 1. The RRU is connected to a baseband unit BBU through an Ir interface, and the BBU is connected to an EPC (Evolved Packet Core) through an S1 interface. The connection between BBU and EPC goes through a private PTN (Packet Transport Network) Network or metropolitan area Network between operators. After the BBU is accessed to the core Network, the BBU and the RRU are wired to realize Ir interface transmission from the BBU to the RRU, and similarly, the base stations are also wired to Access, and the S1 and the X2 interfaces between the base stations are wired to Access the core Network, thereby forming the whole E-UTRAN (Evolved UMTS Terrestrial Radio Access Network), as shown in fig. 2.

Site selection of a base station needs to be carried out according to geographical positions and factors limited by property, the newly added sites need to be laid with wired optical cables at the same time by means of wired connection transmission, after a base station system is opened, the base station system is relatively fixed and cannot move, if a blind zone exists in a coverage area of the base station, a service blind spot can be caused, and when a user enters the service blind spot area from the coverage area of the base station, the problems of call drop and the like can be caused.

Disclosure of Invention

The embodiment of the invention provides a radio frequency remote method, a device and a system, wherein an RRU is additionally arranged on the basis of the original coverage area of a base station system, the RRU is accessed to the original base station system by utilizing a radio bearer between UE and the base station system, and the RRU can be movably arranged or fixedly arranged according to actual needs to form complementation with the coverage area of the original base station system, supplement a coverage blind spot area and solve the problem of call drop after the UE enters the coverage blind spot area of the original base station system.

The embodiment of the invention provides a radio frequency remote method, which comprises the following steps:

a first Remote Radio Unit (RRU) receives a communication address sent by first User Equipment (UE), wherein the communication address is obtained after the first UE is accessed to a base station system;

and according to the communication address, the first RRU establishes a new cell by using a radio bearer between the first UE and the base station system as a transmission link, wherein the base station system comprises a base station, a base band processing unit (BBU) and a second RRU.

An embodiment of the present invention provides a radio remote unit, including:

a first receiving unit, configured to receive a communication address sent by a first user equipment UE, where the communication address is obtained after the first UE accesses a base station system;

and the cell establishing unit is used for establishing a new cell by using a radio bearer between the first UE and the base station system as a transmission link according to the communication address, and the base station system comprises a base station, a baseband processing unit (BBU) and a Radio Remote Unit (RRU).

The embodiment of the invention provides a Radio Remote Unit (RRU) system, which comprises a first RRU, a base station system and first User Equipment (UE), wherein the base station system comprises a base station, a base band processing unit (BBU) and a second RRU, wherein:

the first UE is configured to send the obtained communication address to the first RRU after accessing the base station system to obtain the communication address;

and the first RRU is used for establishing a new cell by using a radio bearer between the first UE and the base station system as a transmission link according to the communication address.

In the radio frequency remote method, the radio frequency remote device and the radio frequency remote system provided by the embodiment of the invention, the RRU is added, the RRU utilizes a radio bearer between the UE accessed to the original base station system and the base station system as a transmission link to establish a new cell, and the RRU can be deployed movably or fixedly, so as to form complementation with a coverage area of the original base station system, supplement a coverage blind spot area and solve the problem of call drop after the UE enters the coverage blind spot area of the original base station system.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of a deployment structure of a base station system in the prior art;

fig. 2 is a schematic diagram of a network structure of a base station system accessing CPC in the prior art;

fig. 3 is a schematic diagram illustrating an operating principle of a remote radio unit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of an application scenario of an embodiment of the present invention;

fig. 5 is a schematic flow chart illustrating an implementation of a radio remote unit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a processing flow of uplink and downlink signals in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of an rf remote device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a radio remote system in an embodiment of the present invention.

Detailed Description

In order to supplement a coverage blind spot area of an opened base station and solve the problem of call drop when UE enters the blind spot area, the embodiment of the invention provides a radio frequency remote method, a radio frequency remote device and a radio frequency remote system.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings of the specification, it being understood that the preferred embodiments described herein are merely for illustrating and explaining the present invention, and are not intended to limit the present invention, and that the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.

For better understanding of the embodiment of the present invention, the working principle of the RRU is described below, wherein an optical fiber remote technology is used between the BBU and the RRU, that is, a digital baseband signal is remote by using an optical fiber, and radio frequency conversion is completed on the sky. The radio frequency remote unit is used for remote-pulling the radio frequency part of the base station through the optical fiber, so that the radio frequency part of the base station is separated from the base station part, the large-capacity base station can be intensively placed in an available central machine room, and the base station part is intensively processed. As shown in fig. 3, the RRU includes a digital intermediate frequency module, a transceiver module, a power amplifier module, and a filtering module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down frequency conversion, A/D conversion and the like of optical transmission; the transceiver module completes the conversion from the intermediate frequency signal to the radio frequency signal; and then the radio frequency signal is transmitted out through the antenna port by the power amplifier and the filtering module.

After the working principle of the RRU is introduced, the radio remote method provided in the embodiment of the present invention is described below.

Fig. 4 is a schematic view of an application scenario according to an embodiment of the present invention. In the embodiment of the invention, a mobile base station mode of UE + RRU is provided by utilizing the mutual cooperation of a plurality of system network elements in a base station system, the mobile base station mode is called as UeNB, the UeNB accesses an original base station system by utilizing the UE to establish a new RRU coverage cell which can be used as a fixed certain point for coverage and can also be used for coverage of a mobile base station, and the UeNB forms function complementation with an original fixed station address to supplement and cover a coverage blind spot area of the original fixed base station system and absorb heat of a user, thereby reducing the impact of high-capacity pressure on the original base station system. In the embodiment of the invention, in the process of accessing the eNB by the UeNB, the UE accesses an original base station in the base station system, establishes a default radio bearer with the base station, allocates an IP address to the UeNB on the basis of establishing the radio bearer, automatically establishes an Ir link node with the original base station system by the UeNB according to the acquired IP address, and establishes a cell of the UeNB to form a fixed communication system or a mobile base station function after the establishment is finished.

As shown in fig. 5, which is a schematic implementation flow diagram of a radio remote unit method according to an embodiment of the present invention, the radio remote unit method may include the following steps:

s51, the first RRU receives a communication address sent by the first UE, where the communication address is obtained after the first UE accesses the base station system.

In this step, the base station may pre-store a UE identity of a first UE (User Equipment), and when monitoring that the first UE requests access, allocate a communication address to the UE, where the communication address may be an IP address. After the first UE accesses the base station, it will establish a UE context radio bearer with the base station system and establish S1 a context radio bearer with the core network.

The IP address allocated by the base station to the first UE may also be a preconfigured IP address. Through the IP address, the base station may identify the first UE. After receiving the uplink signal sent by the UE, the base station may send the uplink signal sent by the UE to the BBU for processing.

In specific implementation, after obtaining the IP address, the first UE sends the IP address to the first RRU, and the first RRU may transmit a radio signal with the first UE by using the IP address.

S52, according to the communication address, the first RRU establishes a new cell by using a radio bearer between the first UE and the base station system as a transmission link.

In this step, the first RRU may communicate with the first UE according to the IP address obtained by the first UE, and access the original base station system by using the radio bearers (including the UE context radio bearer and the core network context radio bearer) established between the first UE and the base station system, where the base station system includes a base station, a BBU, and a second RRU, that is, the first RRU establishes a new cell by using the radio bearer between the first UE and the base station system as a transmission link.

In the embodiment of the invention, by sharing the baseband pool resource in the original base station system, after the attachment of the UE is completed, the UE establishes a CPRI (Common Public Radio Interface) channel with the RRU by using the IP address obtained by the UE, the RRU establishes a new cell by using the baseband resource of the existing base station, and establishes a farther remote communication system by using the baseband pool resource of the original base station system to serve more users.

Fig. 6 is a schematic diagram of a processing flow of uplink and downlink signals in an embodiment of the present invention, where a solid line shows the processing flow of the uplink signal, and a dotted line shows the processing flow of the downlink signal. The UE in fig. 6 may be the second UE or the third UE, and the first UE is the first UE involved in implementing the radio remote method provided in the embodiment of the present invention. In fig. 6, RF AGC refers to radio frequency automatic gain control.

Based on the same inventive concept, the embodiment of the present invention further provides a radio remote device and system, and because the principle of the device and system for solving the problem is similar to that of the radio remote method, the implementation of the device and apparatus can refer to the implementation of the method, and repeated details are not repeated.

As shown in fig. 7, which is a schematic structural diagram of a radio remote device according to an embodiment of the present invention, the radio remote device may include:

a first receiving unit 71, configured to receive a communication address sent by a first user equipment UE, where the communication address is obtained after the first UE accesses a base station system;

a cell establishing unit 72, configured to establish a new cell by using a radio bearer between the first UE and the base station system as a transmission link according to the communication address, where the base station system includes a base station, a baseband processing unit BBU, and a radio remote unit RRU.

For convenience of description, the above parts are separately described as modules (or units) according to functional division. Of course, the functionality of the various modules (or units) may be implemented in the same or in multiple pieces of software or hardware in practicing the invention.

As shown in fig. 8, which is a schematic structural diagram of a radio remote unit system provided in the embodiment of the present invention, the radio remote unit system includes a first RRU81, a base station system 82, and a first UE83, where the base station system 82 includes a base station 821, a BBU 822, and a second RRU 823, where:

a first UE83, configured to send the obtained communication address to the first RRU81 after accessing the base station system 82 to obtain the communication address;

the first RRU81 is configured to establish a new cell by using a radio bearer between the first UE83 and the base station system 82 as a transmission link according to the communication address.

In the embodiment of the invention, based on the existing mobile communication system, a mode of combining the newly added RRUs with the UE is adopted, after the UE is accessed to the base station in the area, the newly added RRUs can establish a channel with the base station in the area through the newly added RRUs, a CPRI interface is established between the newly added RRUs and the BBU of the original base station system, and the base station automatically allocates base band resources. And the newly added RRU establishes a mobile remote between the newly added RRU and the BBU of the original base station system by using the default bearer established by the UE, realizes the function of a mobile base station in a limited area, and extends the distance of the RRU in the base station system in the original area to solve the problems of blind spot coverage, heat absorption and load under a large-capacity user, thereby forming a complementary mobile communication system of the fixed base station and the mobile base station.

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

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

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

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

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

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A radio remote method, comprising:

2. A radio remote unit, comprising:

3. A radio remote unit RRU system is characterized in that the radio remote unit RRU system comprises a first radio remote unit RRU, a base station system and a first user equipment UE, the base station system comprises a base station, a base band processing unit BBU and a second RRU, wherein: