A multi-frequency multi-mode information transmission method and system based on an extended skin base station

Abstract

The present disclosure relates to the technical field of information transmission, and provides a multi-frequency multi-mode information transmission method and system based on an extended pico base station. The method comprises: constructing a radio frequency combining group (RCG); configuring a binding between a BBU end cell and the RCG at the BBU end, and configuring a binding between the RCG and a corresponding pRRU end at a digital convergence unit (DAU) end; wherein each pRRU end can join multiple RCGs, and the pRRU end supports multi-frequency multi-mode information concurrency; based on the binding relationship between the RCG and the BBU end cell and the pRRU end and the topology information of the pRRU end, a channel selection from the BBU end to the pRRU end is performed; a transmission link from the BBU end to the DAU end is opened; transmission links from the DAU end to a pHUB end and from the pHUB end to the corresponding pRRU end are opened; a radio frequency channel of a corresponding carrier of the pRRU end is opened, link connection is completed, cell service is started, and the transmission of multi-frequency multi-mode information is realized; and the method can solve the problems of limited frequency bands and modes supported by a remote unit in an existing co-construction and sharing base station, resource conflicts caused by baseband unit sharing, and management interference.

Description

Technical Field

[0001] This disclosure belongs to the field of information transmission technology, and in particular relates to a multi-frequency, multi-mode information transmission method and system based on extended base stations. Background Technology

[0002] Because 5G base stations have relatively limited signal coverage, a large number of base stations are needed to achieve comprehensive and stable network coverage. Considering the existence of multiple operators in the market, each operator building its own complete base station network would require significant investment of funds and resources, resulting in extremely high construction costs. Therefore, a collaborative model of multiple operators jointly building and sharing base stations has become a highly effective and economical solution. Through this collaboration, operators can share the costs of base station construction and maintenance, significantly reducing the capital expenditure and operating costs for individual operators. Simultaneously, this cooperative approach avoids redundant base station construction, reduces resource waste, improves infrastructure utilization efficiency, and effectively reduces overall energy consumption, promoting green and energy-saving development. In conclusion, the joint construction and sharing of 5G base stations by operators not only helps reduce costs but also promotes efficient and sustainable network construction.

[0003] Current problems with co-constructed and shared extended base stations: 1) The remote unit supports a limited number of frequency bands and modes, and a single remote unit cannot cover the 5G and 4G networking needs of multiple operators.

[0004] 2) There is baseband unit sharing, frequency band resource limitations, mutual interference in management and maintenance, and reduced satisfaction among some operators. Summary of the Invention

[0005] To address the aforementioned issues, this disclosure provides a method and system for multi-frequency, multi-mode information transmission based on expanded base stations. The method employs a technical solution that utilizes a radio frequency combiner (RCG) to establish link mapping between the BBU cell and the pRRU, configures binding relationships at different equipment levels, establishes a complete transmission link based on interface and topology information, and implements multi-carrier data routing control and centralized resource management at the digital aggregation unit (DAU) via FPGA switches. This approach enables efficient multi-frequency, multi-mode information transmission for multiple operators within an expanded base station architecture.

[0006] The following is the technical content of this disclosure: A method for multi-frequency, multi-mode information transmission based on an extended base station, wherein the extended base station includes: multiple independently deployed BBU terminals, multiple shared digital aggregation unit (DAU) terminals, extended unit (pHUB) terminals, and pRRU terminals, characterized by comprising the following steps: Construct a radio frequency combiner group (RCG), where the RCG is a transmission link description between the BBU end cell and the pRRU end in the expanded skin base station, and each BBU end cell corresponds to one RCG. Configure the binding of BBU cell and RCG at the BBU end, and configure the binding of RCG and corresponding pRRU end at the Digital Aggregation Unit (DAU) end; wherein, each pRRU end can add multiple RCGs, and the pRRU end supports multi-frequency multi-mode information concurrency; Based on the binding relationship between RCG, BBU cell, and pRRU, and the topology information of pRRU, channel selection is performed from BBU to pRRU. Based on the interface information between devices, open the transmission link from the BBU to the DAU; based on the topology information of the pRRU, open the transmission link from the DAU to the pHUB, and from the pHUB to the corresponding pRRU. Based on the frequency band information of the BBU-side cell, the radio frequency channel of the corresponding carrier on the pRRU-side is opened to complete the link establishment and start the cell service, thereby realizing the transmission of multi-frequency and multi-mode information.

[0007] Furthermore, Each BBU-side cell corresponds to one RCG, and one RCG is bound to only one BBU-side cell.

[0008] Furthermore, The pRRU terminal can be equipped with multiple RCGs, including: Two 5G type RCGs and two 4G type RCGs.

[0009] Furthermore, The interface between the BBU, DAU, pHUB, and pRRU devices is CPRI.

[0010] Furthermore, When obtaining the topology information of the pRRU, the upper-level device obtains the optical port location of the lower-level device through the transmission protocol between CPRI, determines the connection route between the BBU, the digital aggregation unit (DAU), the expansion unit (pHUB), and the pRRU, and then opens the transmission link from the digital aggregation unit (DAU) to the expansion unit (pHUB) and then to the pRRU.

[0011] Furthermore, Also includes: The Digital Aggregation Unit (DAU) uses the RCGID in the cell information sent by the BBU to count the resource usage of the pRRU corresponding to each RCG. If the resource usage of the pRRU exceeds its carrying capacity, the DAU will generate an alarm, and the over-configured cells will not take effect.

[0012] Furthermore, Also includes: After the BBU restores the configuration from the configuration file, it checks the online status of the Digital Aggregation Unit (DAU) and synchronizes the cell information to the DAU through the CPRI management interface. After restoring the RCG configuration from the configuration file, the Digital Aggregation Unit (DAU) receives cell information from the BBU, detects the online status of the Extension Unit (pHUB) and pRRU, configures the links from the DAU to the pHUB and from the pHUB to the pRRU through the CPRI management interface, and configures the radio frequency parameters of the pRRU.

[0013] Furthermore, In the process of selecting the channel from the BBU to the pRRU based on the binding relationship between the RCG, the BBU cell, and the pRRU, and the topology information of the pRRU: The Digital Aggregation Unit (DAU) uses an FPGA switch to achieve the transceiver mapping of multiple carrier baseband data between its uplink CPRI port and downlink CPRI port. The Extension Unit (pHUB) uses an FPGA switch to achieve the transceiver mapping of multiple carrier baseband data between its uplink CPRI port and downlink CPRI port. The AxC resources of each CPRI port at the DAU end of the digital aggregation unit and the pHUB end of the expansion unit support channel data transmission for multi-frequency, multi-mode cells.

[0014] A multi-frequency, multi-mode information transmission system based on an extended base station, wherein the extended base station includes: multiple independently deployed BBU terminals, multiple shared digital aggregation unit (DAU) terminals, extended unit (pHUB) terminals, and pRRU terminals, characterized in that the system includes: The RCG construction module is used to construct the radio frequency combiner group (RCG). The RCG is a description of the transmission link between the BBU end cell and the pRRU end in the expanded skin base station. Each BBU end cell corresponds to one RCG. The configuration binding module is used to configure and bind BBU cells and RCGs at the BBU end, and to configure and bind RCGs and corresponding pRRU ends at the Digital Aggregation Unit (DAU) end; wherein, each pRRU end can add multiple RCGs, and the pRRU end supports multi-frequency multi-mode information concurrency; The channel selection module is used to select the channel from the BBU to the pRRU based on the binding relationship between the RCG and the BBU cell and the pRRU and the topology information of the pRRU. The link activation module is used to open the transmission link from the BBU to the DAU based on the interface information between the devices; and to open the transmission link from the DAU to the pHUB and from the pHUB to the corresponding pRRU based on the topology information of the pRRU. The radio frequency channel activation module is used to open the radio frequency channel of the corresponding carrier on the pRRU side according to the frequency band information of the BBU side cell, complete the link establishment and start the cell service, and realize the transmission of multi-frequency and multi-mode information.

[0015] Furthermore, The configuration binding module is also used to receive cell operation instructions issued by each operator through the OMC network management interface, and adjust the binding relationship between the BBU cell and RCG, and between RCG and pRRU based on the operation instructions; While opening the corresponding carrier radio frequency channel on the pRRU end, the radio frequency channel opening module also synchronously transmits the frequency point and bandwidth of the BBU end cell to the pRRU end through the CPRI management interface, triggering the pRRU end to call the radio frequency driver to complete the radio frequency parameter configuration of the corresponding frequency band.

[0016] Compared with the prior art, this disclosure has the following advantages: This invention utilizes RCG to decouple the link between the BBU cell and the pRRU, avoiding management conflicts caused by direct operation of shared equipment by multiple operator BBUs; it uses the CPRI interface to achieve high-speed data transmission and automatic topology routing identification between devices, ensuring the accuracy of link establishment from the BBU to the pRRU; and it uses FPGA switches at the Digital Aggregation Unit (DAU) and the Extension Unit (pHUB) to achieve flexible routing of multi-carrier baseband data, supporting multi-frequency and multi-mode concurrency. This effectively solves the problems of limited frequency bands and modes supported by remote units and resource conflicts and management interference caused by baseband unit sharing in existing co-built and shared base stations.

[0017] Other features and advantages of this disclosure will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the method of the present invention is shown; Figure 2 The diagram shows the network framework of the co-constructed and shared extended base station; Figure 3 The diagram showing the relationship between the RCG and the pRRU terminals is provided. Figure 4 The diagram showing the binding relationship between the BBU cell and the RCG is provided. Figure 5 A topology routing diagram from the BBU to the pRRU is shown. Figure 6 This diagram illustrates the NR carrier baseband data transceiver mapping of the FPGA switch at the digital aggregation unit (DAU). Figure 7 This diagram illustrates the NR carrier baseband data transceiver mapping of the FPGA switch at the pHUB terminal of the extension unit. Figure 8 A schematic diagram showing the relationship and topology information between the BBU-cell, RCG, and pRRU ends is provided. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0021] Figure 1 A schematic diagram of the method according to the present invention is shown. Specific implementation details of the present invention include: 1. The co-construction and sharing of expanded base station networking framework, such as... Figure 2 As shown, it includes: Multiple baseband units (BBUs) are deployed independently by each operator; The digital aggregation unit (DAU end) is connected to multiple baseband units (BBU ends); it is used to distribute digital signals. The expansion unit (expansion unit pHUB terminal) is used for the distribution and aggregation of digital signals; The remote unit (pRRU end) supports multiple frequencies and multiple modes, and it shares the same antenna and feeder system with the extension unit (pHUB end).

[0022] 2. Connection methods for each device in the base station network: The devices are connected by CPRI; CPRI (Common Public Radio Interface) is a universal public radio interface that defines the interface relationship between the remote unit and the baseband unit, becoming a remote system for 4 / 5G small cells.

[0023] 3. Sharing methods among operators: Operators independently deploy BBU terminals, while sharing digital aggregation unit (DAU) terminals, expansion unit (pHUB) terminals, and pRRU terminals.

[0024] Signal transmission and reception methods for extended base station networks: Transmission: Signal transmission and reception between the BBU cell and the pRRU is one-to-many. Downlink data from the BBU cell is replicated through the transmission link and sent out from multiple pRRUs. Receive: The uplink signal received by the pRRU is combined through the transmission link and finally reaches the BBU cell. The transmission link between the BBU cell and the pRRU is described by RCG (Radio Combiner Group), with one RCG corresponding to each BBU cell.

[0025] 4. Resource Management Method: The radio frequency resources of the expansion unit (pHUB) and pRRU are uniformly managed by the digital aggregation unit (DAU). The DAU manages the pRRU by configuring commands to inform the networking system of the RCG to which it belongs. The transmission resources of the link are confirmed based on the RCG's membership information.

[0026] like Figure 3 As shown, each RCG has more than one pRRU terminal. Each pRRU terminal can accommodate multiple 2-5G RCGs and 2-4G RCGs.

[0027] Operators A and B deploy their BBUs separately. On the BBU side, commands can be used to bind the RCG (Regulatory Group) at the Digital Aggregation Unit (DAU) to the BBU cell. The relationship between the BBU cell and the RCG is one-to-one; one RCG cannot be bound to multiple BBU cells. Figure 4 .

[0028] The total resource specifications of the expansion units pHUB and pRRU connected to the DAU end are shared by the BBU end connected to the DAU end. The allocation of the total resource specifications needs to be configured on the DAU end according to each uplink port. The BBU end needs to use resources according to the resource situation on the DAU end and cannot exceed the specifications.

[0029] 5. The implementation steps for the carrier data transmission and reception link from the BBU cell to the pRRU are as follows: 1) Constructing Radio Frequency Combiner Groups (RCGs): By constructing radio frequency combiner groups (RCGs), the BBU (Block BU) cell and pRRU (Push-Rush RU) are associated. The BBU cannot directly operate the resources of the Digital Aggregation Unit (DAU), and resource mapping needs to be achieved through the RCG. (The DAU is a common resource shared by multiple operators. The specific resources of the extension units such as the pHUB and pRRU are not associated with the operator's BBU. The BBU cannot directly operate the resources of the DAU.) 2) Link configuration binding: BBU end: Configure and bind the cell and RCG, and configure the CPRI port corresponding to the cell signal; Digital aggregation unit (DAU) end: Configure and bind the RCG and the corresponding pRRU end; 3) Link establishment during cell activation: Step 1: Based on the CPRI port corresponding to the BBU cell, open the link from the BBU to the DAU (Digital Aggregation Unit). Step 2: Based on the topology information of the pRRU end (obtain the optical port positions of the upper and lower level devices through CPRI optical port communication, determine the route, such as "Mobile BBU end downlink port 1 → Digital aggregation unit DAU end uplink port 1 → Digital aggregation unit DAU end downlink port 1 → HUB uplink port → HUB downlink port → pRRU end uplink port"), open the link from the digital aggregation unit DAU end to the expansion unit pHUB end and then to the pRRU end; Step 3: Based on the frequency band information of the cell, open the radio frequency channel of the corresponding carrier on the pRRU end to complete the link establishment and start the cell service; 4) Data routing control: Digital aggregation unit (DAU): Through FPGA switches with 6 uplink ports and 6 downlink ports, baseband data transmission and reception mapping for 2 NR carriers and 2 LTE carriers is realized; The pHUB expansion unit enables baseband data transmission and reception mapping for two NR carriers and two LTE carriers via an FPGA switch with one uplink port and eight downlink ports.

[0030] Specifically, the acquisition of topology information from the BBU to the pRRU includes: At the BBU end, the DAU end, the HUB and RRU are all connected via CPRI optical ports, and the devices can communicate with each other based on the optical ports. The upper-level device can obtain the optical port location of the lower-level device through the CPRI transmission protocol. The specific communication method will not be described in detail here. like Figure 5 As shown, the mobile BBU is connected to the uplink port CPRI1 of the digital aggregation unit (DAU) via CPRI1; the downlink port of the DAU is connected to the uplink port CPRI1 of the HUB; and the downlink port CPRI1 of the HUB is connected to the pRRU.

[0031] The topology route from BBU to pRRU 1 is as follows: Mobile BBU downlink port 1 -> Digital aggregation unit (DAU) uplink port 1 -> Digital aggregation unit (DAU) downlink port 1 -> HUB uplink port -> HUB downlink port 1 -> pRRU 1 uplink port.

[0032] Specifically, the transmission of cell baseband data includes: 1) Core Interface and Data Unit Definition: CPRI (General Public Radio Interface) is an open digital interface standard. Its core is used for high-speed data transmission between the baseband unit (BBU) of a wireless base station and the remote radio unit (RRU / pRRU). It usually carries digital baseband signals through optical fiber. AxC is the basic data unit of the CPRI frame structure. It is specifically used to carry IQ samples of digital baseband signals and is the "carrier" for signal transmission between the BBU and pRRU. The BBU encapsulates the processed baseband signal into AxC and sends it to the pRRU. The pRRU receives the signal and then converts it into a radio frequency signal for transmission.

[0033] 2) AxC resource capability of the patented equipment: The expanded base station equipment involved in this patent supports two 2T2R configured NR (5G) cells and two 2T2R configured LTE (4G) cells in the AxC resource of each CPRI port. That is, a single CPRI port can carry baseband data transmission of up to two NR carriers and two LTE carriers.

[0034] 3) Carrier allocation rules: Based on the shared needs of multiple operators, NR carriers and LTE carriers are allocated according to operators - NR carrier 1 is allocated to China Mobile N41 cell, and NR carrier 2 is allocated to China Telecom N77 / N78 cell; LTE carrier 1 is allocated to China Mobile 1.8GFDD cell, and LTE carrier 2 is allocated to China Telecom 1.8GFDD cell, ensuring that the frequency band resources of different operators are independent and do not conflict.

[0035] Specifically, the channel selection for the link from the BBU to the pRRU includes: The core of channel selection is to achieve precise mapping of multi-carrier baseband data between the uplink and downlink ports through the FPGA switches at the DAU and pHUB terminals of the digital aggregation unit. This is specifically divided into two levels of device operation: 1) Channel mapping at the Digital Aggregation Unit (DAU): The DAU is equipped with 6 uplink ports (connecting to the BBU) and 6 downlink ports (connecting to the pHUB). The cell identifiers corresponding to the downlink ports are CELL0~CELL11, and each cell is an independent cell configured with 2T2R. The DAU controls the connection relationship between the uplink and downlink ports via an FPGA switch, enabling the transmission and reception mapping of two NR carrier baseband data (e.g., ...). Figure 6 As shown, the mapping logic of the LTE carrier is the same as that of NR (not shown separately), that is, based on the RCG association result and topology information, the carrier data of the specified BBU end (such as the mobile BBU end) is routed to the downlink port connected to the corresponding extension unit pHUB end through the FPGA switch.

[0036] 2) Channel mapping at the pHUB end of the expansion unit: The pHUB end of the expansion unit is equipped with 1 uplink port (connecting to the DAU end of the digital aggregation unit) and 8 downlink ports (connecting to the pRRU end). Note that the "cell" in its identifier only represents the carrier number (not the cell ID); consistent with the principle of the DAU end, the pHUB end of the expansion unit controls the connection between the uplink and downlink ports through an FPGA switch to realize the transmission and reception mapping of the baseband data of 2 NR carriers (e.g., Figure 7 As shown, the LTE carrier mapping logic is the same as that of NR (not illustrated separately). Finally, the carrier data transmitted by the Digital Aggregation Unit (DAU) is routed to the target pRRU, completing the channel selection from the BBU to the pRRU.

[0037] Specifically, the link operation from the BBU to the pRRU includes: 1) Prerequisites for link operation: RCG binding and topology information determination First, device association configuration needs to be completed to clarify the transmission route: add the target pRRU end (e.g., pRRU end 1, pRRU end 2) to the same RCG, and bind this RCG to the designated BBU end cell (e.g., N41 cell 0); through the CPRI interface transmission protocol, automatically obtain the CPRI connection topology information of "BBU end → Digital Aggregation Unit (DAU) end → Extension Unit (pHUB) end → pRRU end" (e.g., "Mobile BBU end connects to CPRI1 downlink → Digital Aggregation Unit (DAU) end connects to CPRI1 uplink → Digital Aggregation Unit (DAU) end connects to CPRI1 downlink → Extension Unit (pHUB) end connects to CPRI uplink → Extension Unit (pHUB) end connects to CPRI1 / 2 downlink → pRRU end 1 / 2 connects to CPRI uplink), providing a routing basis for subsequent link establishment (corresponding to...). Figure 8(The relationships shown are as follows).

[0038] 2) Specific operational procedures for link establishment Based on the established topology information, the link operation is completed in the order of "data carrying → channel mapping → data distribution → radio frequency activation," and the CPRI data on the N41 carrier is transmitted at the preset AxC position throughout the entire process to ensure stable data routing. Baseband data bearer configuration: Load the baseband data of cell 0 of N41 into the N41 carrier corresponding to the CPRI1 interface of the BBU to complete the initial data bearer configuration; Enable channel mapping at the Digital Aggregation Unit (DAU): By using the FPGA switch at the DAU end, enable the channel mapping between its upstream CPRI1 interface (connected to the BBU end) and downstream CPRI1 interface (connected to the pHUB end), so that the N41 baseband data transmitted at the BBU end can be routed to the target pHUB end through the DAU end of the Digital Aggregation Unit. Data distribution enabled at pHUB end of expansion unit: Enable the receiving channel of the uplink CPRI interface (connected to the DAU end of digital aggregation unit) at pHUB end of expansion unit, and distribute the received N41 baseband data to its downlink CPRI1 interface (connected to pRRU end 1) and downlink CPRI2 interface (connected to pRRU end 2) through the FPGA switch at pHUB end of expansion unit. pRRU RF Channel Activation: Turn on the N41 band RF switch of pRRU 1 and pRRU 2, so that the pRRU can receive baseband data transmitted from the extension unit pHUB and convert it into RF signal for transmission. At the same time, it can receive external RF signals and send them back to the BBU, thus completing the full-link transmit-receive closed loop.

[0039] 3) Configuration distribution and binding relationship confirmation for BBU-side cells (1) Configure the distribution method Each operator uses an independent OMC (Operation and Maintenance Center) network management system to send cell operation commands to its own deployed BBU via a standard southbound interface. Specific commands include: cell activation, cell deactivation, and cell parameter (such as frequency point and bandwidth) configuration. The specific implementation of the OMC network management interface is not within the scope of this patent protection and will not be described in detail here.

[0040] (2) Formation of binding relationship The binding relationship between the BBU-side cell and the pRRU-side cell needs to be achieved based on the two steps described above: "BBU-side configuration management" and "Digital Aggregation Unit (DAU)-side configuration management". BBU-side configuration management: Complete the binding of "cell and RCG" on the BBU side (e.g., binding N41 cell 0 with the target RCG). Digital aggregation unit (DAU) configuration management: Complete the binding of "RCG and pRRU" at the DAU end (e.g., binding the target RCG to pRRU 1 and pRRU 2); through the above two-level binding, a unique mapping relationship of "BBU cell → RCG → pRRU" is finally formed, providing the basis for link operation.

[0041] Cell activation / cell parameter configuration: When the BBU cell is activated, refer to "Link Operation from BBU to pRRU" to open the link channel between the BBU and pRRU. The cell parameters of N41 (such as frequency bandwidth) are then transmitted to the pRRU via the CPRI management interface. Upon receiving the cell configuration from the BBU, the pRRU completes the radio frequency parameter configuration by calling the radio frequency driver. The component that obtains the topology information (as described in the previous section) determines which pRRU to send the BBU cell configuration to based on the topology information and queries its IP address through the device management component. The transmission protocol is based on TCP RPC messages, which will not be described in detail here.

[0042] Deactivate the community: When the BBU cell is deactivated, refer to "Link Operation from BBU to pRRU" to close the link channel from BBU to pRRU.

[0043] Digital aggregation unit DAU end resource detection: The pRRU terminal supports 4 carriers. When the pRRU terminal is configured with more resources than the following frequency bands, an alarm will be generated on the digital aggregation unit (DAU) terminal, and the cell configuration exceeding the resources will not take effect.

[0044]

[0045] Judgment method: The resource user at the Digital Aggregation Unit (DAU) is the BBU (Browser Unit). The usage method involves binding the RCG (Regional Characteristic) constructed by the DAU to the cell at the BBU. The cell configuration at the BBU is sent to the DAU via the CPRI (Cell Pricing Processor) management interface. The DAU uses the RCGID from the cell information sent by the BBU to determine and statistically analyze the resource usage of all pRRUs (Public Relational Runners). When the total resources exceed the pRRU's capacity, the DAU generates an alarm, which can be viewed using the `show current-alarm` command on the DAU.

[0046] Recovery mechanism: 1) When a pRRU resource conflict alarm is generated at the Digital Aggregation Unit (DAU) end, the alarm can be eliminated by deactivating the over-configured cells.

[0047] 2) By reorganizing the resource usage of the pRRU end and changing the pRRU end members under RCG, resource conflicts on the pRRU end can be avoided.

[0048] Configuration restoration: Both the BBU and the DAU have configuration saving and restoration mechanisms. The configuration is saved in a file and retrieved after startup and restart of the process.

[0049] 1) BBU-side configuration recovery process: After the BBU restores the configuration from the configuration file, it needs to synchronize the cell information to the Digital Aggregation Unit (DAU). The BBU uses the device management component to detect whether the DAU is online (whether the network is connected). When the DAU is detected to be online, the BBU sends the cell information to the DAU through the CPRI management interface.

[0050] 2) Configuration of the Digital Aggregation Unit (DAU): After the Digital Aggregation Unit (DAU) is powered on, it restores the configuration from the configuration file, completes the restoration of the RCG configuration, and waits for cell information from the BBU. When it receives the cell information from the BBU, it determines whether the HUB and RRU are online. If the devices are online, it transmits the relevant link switch configuration to the HUB and pRRU through the CPRI management interface and makes it effective. At the same time, it configures the radio frequency parameters of the pRRU.

[0051] Based on the method of this disclosure, embodiments of this disclosure also provide a system corresponding to the above method, which includes: The RCG construction module is used to construct the radio frequency combiner group (RCG). The RCG is a description of the transmission link between the BBU end cell and the pRRU end in the expanded skin base station. Each BBU end cell corresponds to one RCG. The configuration binding module is used to configure and bind BBU cells and RCGs at the BBU end, and to configure and bind RCGs and corresponding pRRU ends at the Digital Aggregation Unit (DAU) end; wherein, each pRRU end can add multiple RCGs, and the pRRU end supports multi-frequency multi-mode information concurrency; The channel selection module is used to select the channel from the BBU to the pRRU based on the binding relationship between the RCG and the BBU cell and the pRRU and the topology information of the pRRU. The link activation module is used to open the transmission link from the BBU to the DAU based on the interface information between the devices; and to open the transmission link from the DAU to the pHUB and from the pHUB to the corresponding pRRU based on the topology information of the pRRU. The radio frequency channel activation module is used to open the radio frequency channel of the corresponding carrier on the pRRU side according to the frequency band information of the BBU side cell, complete the link establishment and start the cell service, and realize the transmission of multi-frequency and multi-mode information.

[0052] Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A method for multi-frequency, multi-mode information transmission based on an extended-skin base station, wherein the extended-skin base station comprises: The BBU terminal deployed independently by multiple operators, the DAU terminal shared by multiple operators, the pHUB terminal, and the pRRU terminal are characterized by including the following steps: Construct a radio frequency combiner group (RCG), where the RCG is a transmission link description between the BBU end cell and the pRRU end in the expanded skin base station, and each BBU end cell corresponds to one RCG. Configure the binding of BBU cell and RCG at the BBU end, and configure the binding of RCG and corresponding pRRU end at the Digital Aggregation Unit (DAU) end; wherein, each pRRU end can add multiple RCGs, and the pRRU end supports multi-frequency multi-mode information concurrency; Based on the binding relationship between RCG, BBU cell, and pRRU, and the topology information of pRRU, channel selection is performed from BBU to pRRU. Based on the interface information between devices, open the transmission link from the BBU to the DAU; based on the topology information of the pRRU, open the transmission link from the DAU to the pHUB, and from the pHUB to the corresponding pRRU. Based on the frequency band information of the BBU-side cell, the radio frequency channel of the corresponding carrier on the pRRU-side is opened to complete the link establishment and start the cell service, thereby realizing the transmission of multi-frequency and multi-mode information.

2. The multi-frequency, multi-mode information transmission method based on an extended-skin base station according to claim 1, characterized in that, Each BBU-side cell corresponds to one RCG, and one RCG is bound to only one BBU-side cell.

3. The multi-frequency, multi-mode information transmission method based on an extended-skin base station according to claim 1, characterized in that, The pRRU terminal can be equipped with multiple RCGs, including: Two 5G type RCGs and two 4G type RCGs.

4. The multi-frequency, multi-mode information transmission method based on an extended-skin base station according to claim 1, characterized in that, The interface between the BBU, DAU, pHUB, and pRRU devices is CPRI.

5. A multi-frequency, multi-mode information transmission method based on an extended-skin base station according to claim 2, characterized in that, When obtaining the topology information of the pRRU, the upper-level device obtains the optical port location of the lower-level device through the transmission protocol between CPRI, determines the connection route between the BBU, the digital aggregation unit (DAU), the expansion unit (pHUB), and the pRRU, and then opens the transmission link from the digital aggregation unit (DAU) to the expansion unit (pHUB) and then to the pRRU.

6. The multi-frequency, multi-mode information transmission method based on an extended-skin base station according to claim 1, characterized in that, Also includes: The Digital Aggregation Unit (DAU) uses the RCGID in the cell information sent by the BBU to count the resource usage of the pRRU corresponding to each RCG. If the resource usage of the pRRU exceeds its carrying capacity, the DAU will generate an alarm, and the over-configured cells will not take effect.

7. The multi-frequency, multi-mode information transmission method based on an extended base station according to claim 1, characterized in that, Also includes: After the BBU restores the configuration from the configuration file, it checks the online status of the Digital Aggregation Unit (DAU) and synchronizes the cell information to the DAU through the CPRI management interface. After restoring the RCG configuration from the configuration file, the Digital Aggregation Unit (DAU) receives cell information from the BBU, detects the online status of the Extension Unit (pHUB) and pRRU, configures the links from the DAU to the pHUB and from the pHUB to the pRRU through the CPRI management interface, and configures the radio frequency parameters of the pRRU.

8. The multi-frequency, multi-mode information transmission method based on an extended base station according to claim 1, characterized in that, In the process of selecting the channel from the BBU to the pRRU based on the binding relationship between the RCG, the BBU cell, and the pRRU, and the topology information of the pRRU: The Digital Aggregation Unit (DAU) uses an FPGA switch to achieve the transceiver mapping of multiple carrier baseband data between its uplink CPRI port and downlink CPRI port. The Extension Unit (pHUB) uses an FPGA switch to achieve the transceiver mapping of multiple carrier baseband data between its uplink CPRI port and downlink CPRI port. The AxC resources of each CPRI port at the DAU end of the digital aggregation unit and the pHUB end of the expansion unit support channel data transmission for multi-frequency, multi-mode cells.

9. A multi-frequency, multi-mode information transmission system based on an extended-skin base station, wherein the extended-skin base station comprises: The system comprises multiple independently deployed BBU terminals, multiple shared digital aggregation unit (DAU) terminals, expansion unit (pHUB) terminals, and pRRU terminals, characterized in that the system includes: The RCG construction module is used to construct the radio frequency combiner group (RCG). The RCG is a description of the transmission link between the BBU end cell and the pRRU end in the expanded skin base station. Each BBU end cell corresponds to one RCG. The configuration binding module is used to configure and bind BBU cells and RCGs at the BBU end, and to configure and bind RCGs and corresponding pRRU ends at the Digital Aggregation Unit (DAU) end; wherein, each pRRU end can add multiple RCGs, and the pRRU end supports multi-frequency multi-mode information concurrency; The channel selection module is used to select the channel from the BBU to the pRRU based on the binding relationship between the RCG and the BBU cell and the pRRU and the topology information of the pRRU. The link activation module is used to open the transmission link from the BBU to the DAU based on the interface information between the devices; and to open the transmission link from the DAU to the pHUB and from the pHUB to the corresponding pRRU based on the topology information of the pRRU. The radio frequency channel activation module is used to open the radio frequency channel of the corresponding carrier on the pRRU side according to the frequency band information of the BBU side cell, complete the link establishment and start the cell service, and realize the transmission of multi-frequency and multi-mode information.

10. The system according to claim 9, characterized in that, The configuration binding module is also used to receive cell operation instructions issued by each operator through the OMC network management interface, and adjust the binding relationship between the BBU cell and RCG, and between RCG and pRRU based on the operation instructions; While opening the corresponding carrier radio frequency channel on the pRRU end, the radio frequency channel opening module also synchronously transmits the frequency point and bandwidth of the BBU end cell to the pRRU end through the CPRI management interface, triggering the pRRU end to call the radio frequency driver to complete the radio frequency parameter configuration of the corresponding frequency band.

Images