WO2012065419A1 - Procédé, système et sous-système logique de traitement en cascade pour mettre en oeuvre une mise en cascade de stations de base - Google Patents
Procédé, système et sous-système logique de traitement en cascade pour mettre en oeuvre une mise en cascade de stations de base Download PDFInfo
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- WO2012065419A1 WO2012065419A1 PCT/CN2011/074452 CN2011074452W WO2012065419A1 WO 2012065419 A1 WO2012065419 A1 WO 2012065419A1 CN 2011074452 W CN2011074452 W CN 2011074452W WO 2012065419 A1 WO2012065419 A1 WO 2012065419A1
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- base station
- cascading
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Definitions
- the present invention relates to a base station connection technology in the field of mobile communications, and in particular, to a method, system and cascade processing logic subsystem for implementing base station cascading through different transmission media.
- E1/T1 stands for two data transmission rate standards, of which E1 is a European standard with a rate of 2.048 Mbps; T1 is a North American standard with a rate of 1.544 Mbps.
- BSC base station controller
- a plurality of lower base stations are connected in the cascading of the base station, that is, each base station (referred to as a higher-level base station) connected to the base station controller, and then reconnected to multiple base stations through a certain transmission medium. (referred to as a lower base station), all base stations accessing the base station controller in a cascade manner are collectively referred to as a cascade base station.
- the cascading mode of the base station can make full use of the E1/T1 line transmission resources provided by the base station controller or the Radio Network Controller (RNC) to improve the transmission efficiency.
- RNC Radio Network Controller
- the upper base station and the base station controller are connected by the transmission medium, and the upper base station is connected to the plurality of lower base stations through the transmission medium, thereby forming a cascade manner of the upper and lower two-level base stations.
- the transmission medium used in the two-stage cascade interface uses the E1/T1 line, that is, the connection between the upper base station and the base station controller, and uses the E1/T1 line; the access of the lower base station also uses E1/T1. line.
- the bandwidth of each lower-level base station is exclusive, and the total bandwidth of each lower-level base station is the bandwidth provided by the upper-level E1/T1, and the bandwidth provided by E1/T1 is allocated to the lower-level base station by the method of time slot separation.
- the bandwidth occupied by each subordinate base station is fixed and exclusive, even when it does not use bandwidth resources, other subordinate base stations cannot be used. This has caused a waste of bandwidth resources.
- multiple upper-level base stations need to be accessed through the upper-level base station, multiple ports must be configured, resulting in a lack of flexibility in networking. Summary of the invention
- the main purpose of the present invention is to provide a method, a system, and a cascading processing logic subsystem for implementing base station cascading, which can save bandwidth resources and improve networking flexibility.
- a method for implementing cascading of a base station where an upper base station and a network side are connected by an E1/T1 line, and an upper Ethernet line is connected between the upper base station and the lower base station;
- the method also includes:
- the upper base station uniformly receives data packets and forwards the received data packets between different transmission media.
- the lower base station is one;
- the lower base station and the upper base station are directly connected by a network cable.
- the method further includes: setting a gateway IP address of the lower-level base station to a gateway IP address of the upper-level base station to which the base station belongs, and the data packet is uniformly received by the upper-level base station.
- the method further includes: determining, according to the destination address carried in the data packet, whether the received data packet belongs to the local base station, and if it belongs to the local base station, the base station is Processing, end this process.
- the forwarding the received data packet includes:
- the received data packet is converted into a frame format by the destination address carried in the data packet, and then transmitted to the base station controller on the E1/T1 interface side, or to the lower base station on the Ethernet interface side.
- the method further includes: If the cascading switch is turned on, the step of forwarding the data packet is continued; if the cascading switch is turned off, the received data packet is discarded, and the process ends.
- the method further includes: the upper base station successfully acquiring the target base station information.
- the method further includes:
- the upper base station sends an address translation protocol ARP packet for acquiring the information of the target base station, and stores the obtained base station information.
- a system for implementing base station cascading includes at least a network side, an upper base station, and a lower base station;
- the upper base station and the network side are connected by an E1/T1 line, and the upper base station and the lower base station are connected by an Ethernet line;
- a cascading processing logic subsystem is configured in the upper base station to uniformly receive data packets and forward the received data packets between different transmission media.
- the network side includes a base station controller, or a radio network controller.
- the cascading processing logic subsystem includes at least a data interface conversion module, a cascading information maintenance module, a user data exchange module, and a cascade switch module;
- the data interface conversion module includes an E1/T1 interface conversion module and an FE interface conversion module: an E1/T1 interface conversion module, configured to convert a downlink data packet frame format at the E1/T1 interface into a frame format of an Ethernet interface; An interface conversion module, configured to convert an uplink data packet frame format at the FE interface into a frame format transmitted by the E1/T1 interface;
- a cascading information maintenance module configured to record and maintain cascading base station parameters
- a user data exchange module configured to allocate CPU resources to the user, process the service data stream, implement fast hardware switching and network address translation function from the lower base station to the base station controller; and cascade switch module for controlling the cascade function
- the cascading switch When the cascading switch is turned on, the lower-level base station is connected to the upper-level base station through the FE interface. When the cascading switch is turned off, the upper-level base station accesses the base station controller independently, and does not forward the lower-level cascading data.
- the cascading information maintenance module is configured to: when the upper base station receives data from the E1/T1 or the FE port, record the base station information carried in the data packet to form a base station information database; or, when the base station information changes , update the database.
- the cascading processing logic subsystem further includes an IP header compression module for compressing data packets on the E1/T1 link.
- a cascading processing logic subsystem comprising at least a data interface conversion module, a cascading information maintenance module, a user data exchange module, and a cascade switch module;
- the data interface conversion module includes an E1/T1 interface conversion module and an FE interface conversion module: an E1/T1 interface conversion module, configured to convert a downlink data packet frame format at the E1/T1 interface into a frame format of an Ethernet interface; An interface conversion module, configured to convert an uplink data packet frame format at the FE interface into a frame format transmitted by the E1/T1 interface;
- a cascading information maintenance module configured to record and maintain cascading base station parameters
- a user data exchange module configured to allocate CPU resources to the user, process the service data stream, implement fast hardware switching and network address translation function from the lower base station to the base station controller; and cascade switch module for controlling the cascade function
- the cascading switch When the cascading switch is turned on, the lower-level base station is connected to the upper-level base station through the FE interface.
- the cascading switch When the cascading switch is turned off, the upper-level base station accesses the base station controller independently, and does not forward the lower-level cascading data.
- the cascading information maintenance module is configured to: when the upper base station receives data from the E1/T1 or the FE port, record the base station information carried in the data packet to form a base station information database; or, when the base station information changes , update the database.
- the cascading processing logic subsystem further includes an IP header compression module for compressing data packets on the E1/T1 link.
- the upper base station and the base station controller are connected by the E1/T1 line, and the upper base station and the lower base station are connected.
- the interface is connected by Ethernet, and the functions of flow control and congestion scheduling are implemented through the cascade processing logic subsystem.
- the upper base station and the lower base station In the Ethernet networking mode, a port is flexibly connected to multiple lower-level base stations, and bandwidth sharing is realized. The bandwidth is dynamically allocated according to the bandwidth requirements of each lower-level base station, and the bandwidth is not occupied when the base station does not use bandwidth. The other base stations can still use the bandwidth resource.
- the lower-level base station accessing through the Ethernet does not perceive that it accesses the base station controller through the upper-level base station, but considers that it is directly connected to the base station controller.
- the base station cascading mode of the invention realizes dynamic sharing of bandwidth, reduces cost and improves networking flexibility, and improves the capacity of the cascaded base station.
- FIG. 1 is a schematic diagram of a cascading of a base station according to an implementation scenario of the present invention
- FIG. 2 is a schematic structural diagram of components of a cascade processing logic subsystem of the present invention
- FIG. 3 is a flowchart of data processing at an E1/T1 interface of a higher-level base station of the present invention
- the upper base station and the base station controller are connected by an E1/T1 line, and the upper base station and the lower base station are connected by a Fast Ethernet (FE) line; when there is only one lower base station, the upper base station can pass The network cable is directly connected.
- FE Fast Ethernet
- the gateway IP address needs to be set as the gateway IP address of the upper-level base station, and the data packet is uniformly received by the upper-level base station.
- a base station directly connected to a base station controller is referred to as a higher-level base station
- a base station directly connected to the upper-level base station is referred to as a lower-level base station
- all base stations accessing the base station controller in a cascade manner are collectively referred to as a cascaded base station.
- FIG. 1 is a schematic diagram of a cascading of a base station according to an implementation scenario of the present invention, as shown in FIG.
- the base station (such as NodeB1 in FIG. 1) is connected to the base station controller (BSC) or the RNC by using an E1/T1 line, and the interface between the two is an Abis interface or an IUB interface.
- the Abis interface or the IUB interface herein belongs to the physical physical interface, and the link layer protocol of the upper physical port of the entity includes a High Level Data Link Control (HDLC) and a Point-to-Point Protocol (PPP).
- HDLC High Level Data Link Control
- PPP Point-to-Point Protocol
- the upper base station (such as NodeB 1 in FIG. 1) and the lower base station (such as NodeB2, NodeB3, and NodeBN in FIG. 1) are connected by an Ethernet line, and the Ethernet interface is connected to a plurality of different lower levels through an IP protocol.
- Base station The total egress bandwidth of all cascaded base stations is the bandwidth resource provided by the E1/T1 line between the upper base station and the BSC or RNC. Each base station in the cascading mode of the present invention shares the total used bandwidth.
- the transmission between the data of the upper and lower base stations and the base station controller is realized by the control of the cascade processing logic subsystem.
- the cascading processing logic subsystem can be set in the upper base station, and the communication between the eNB and the base station controller can be realized by corresponding processing of the data by each module.
- the present invention further provides a system for implementing base station cascading, which includes at least a network side, an upper base station, and a lower base station;
- the upper base station and the network side are connected by an E1/T1 line, and the upper base station and the lower base station are connected by an Ethernet line;
- a cascading processing logic subsystem is configured in the upper base station to uniformly receive data packets and forward the received data packets between different transmission media.
- the network side includes a base station controller, or a radio network controller.
- FIG. 2 is a schematic structural diagram of each module of the cascading processing logic subsystem of the present invention.
- a cascading logic processing subsystem an E1/T1 line and a higher-level base station (such as the first stage in FIG. 1) are provided.
- the format conversion and data frame forwarding between data streams are performed between the Ethernet lines through the cascading processing logic subsystem.
- the cascading processing logic subsystem includes at least a cascading information dimension. a protection module, a user data exchange module, a cascade switch module, and a data interface conversion module including an E1T1 interface conversion module and an FE interface conversion module, wherein:
- the data interface conversion module is used to implement transparent data exchange and forwarding, and eliminates the difference between the data frames of the link layer of the E1/T1 and FE transmission media, extracts data, and realizes transparent forwarding between the two interfaces.
- the E1/T1 interface conversion module and the FE interface conversion module respectively perform data frame format conversion on the two interfaces, specifically; on the E1/T1 interface, the E1/T1 interface conversion module is used in the interface from the E1/T1 interface.
- the frame format of the data packet is converted into a frame format that can be transmitted on the Ethernet interface; correspondingly, at the Ethernet interface, the FE interface conversion module is used to be from the lower level.
- the frame format of the data packet is converted into a frame format that can be transmitted on the E1/T1 interface.
- the smooth transfer of data can be realized by the function of the data interface conversion module.
- the cascading information maintenance module is configured to record and maintain related parameters such as the IP address and the MAC address of the cascaded base station.
- the cascading information maintenance module records each The base station information carried in the data packet of the logical subsystem is processed by the cascade to form a base station information database.
- the data received by the cascaded information maintenance module from the E1/T1 or FE port is in the database.
- the information is compared to determine the destination base station. Further, when the base station related parameters carried in the data packet from the concatenated base station are updated or accessed to the new base station, the information in the base station information database is updated.
- the destination base station information is obtained from the cascading information maintenance module, and the data packet carrying the destination base station information is used to obtain CPU resources through the user data exchange module.
- a user data exchange module is configured to allocate CPU resources to the user and process the service data stream.
- the user data notification module is notified, and the user data exchange module allocates resources for the user, and implements fast hardware switching and network address translation from the lower-level base station to the base station controller.
- the upper-level base station receives the cascading message (including the packet that the base station controller needs to send to the lower-level base station and the packet sent by the lower-level base station to the upper-level base station)
- the UDP user plane data is analyzed, and the data is dynamically established according to the user's demand for the bandwidth resource. Forwarding link.
- the system monitors the usage of the resources occupied by the user. After the user UDP data stream is idle for a period of time, the system resources are released, the bearer link resources are deleted, and the resources are dynamically allocated.
- a cascade switch module is used to enable or disable the channel of the lower base station to access the upper base station through the Ethernet interface.
- the opening or closing of the cascade function is controlled by the cascade switch module. If the cascading switch is turned off, the upper base station is equivalent to the independent access base station controller or RNC, and does not forward the lower cascading data. If the cascading switch is enabled, the cascading function takes effect, and the upper-level base station forwards the lower-level cascading data to the lower-level base station.
- the opening or closing of the cascade switch is automatically set by the cascade processing logic subsystem.
- the upper base station and the lower base station can be directly connected through the network cable.
- the lower base station is through the Ethernet.
- the cascade processing logic subsystem when set, the cascade switch is set to be on or off according to the networking mode.
- the cascading processing logic subsystem of the present invention further includes an IP header compression module for compressing data packets on the E1/T1 link to improve link utilization.
- FIG. 3 is a flowchart of data processing at the upper base station and the E1/T1 interface according to the present invention. As shown in FIG. 3, the method includes the following steps:
- Step 301 After receiving the data frame, the E1/T1 interface obtains the data packet, and the cascading information maintenance module compares the destination base station information carried in the data packet with the base station information recorded in the database, and determines whether the destination address of the packet is If the destination address of the packet is the upper-level base station, the packet is delivered to the corresponding upper-level base station for data processing, and the process ends; if the destination address of the packet is the lower-level base station, the process proceeds to step 302.
- Step 302 Determine whether the cascading switch is turned on. When the cascading switch is turned on, the packet can be delivered to the cascading base station, and the process proceeds to step 303. When the cascading switch is turned off, the data packet is discarded and is not forwarded. End this process.
- Step 303 The upper-level base station acquires related information such as IP and MAC of the target base station from the cascading information maintenance module. In this step,
- Ethernet needs to learn the MAC address of the destination base station to forward (and E1 is the point)
- the point-to-point PPP protocol can be directly forwarded. Therefore, it is necessary to modify or replace the network layer forwarding according to the frame format of the data packet that can be received by the interface of the destination base station according to the information about the destination base station recorded by the cascading information maintenance module. Modified IP header format.
- step 304 if the destination base station address information is successfully obtained, the process proceeds to step 304. If the information about the destination base station fails to be obtained, the address resolution protocol (ARP) packet is sent through the Ethernet interface to implement the IP address. The mapping with the Ethernet MAC address obtains the destination base station MAC address information. If the ARP response is obtained, the corresponding information is added to the cascading information maintenance module, and the process proceeds to step 304. If the ARP response is not obtained, the packet is discarded and no longer forwarded, and the process ends.
- ARP address resolution protocol
- Step 304 Add an Ethernet frame header to the data packet, and send data from the Ethernet interface to the destination base station.
- the data interface conversion module converts the packet to be forwarded into a frame format that can be forwarded by the Ethernet interface, and then sends the packet from the Ethernet port to the destination lower-level base station.
- the specific conversion method is a conventional method for those skilled in the art, and details are not described herein again.
- FIG. 4 is a flow chart of data processing at a higher-level base station and a FE interface according to the present invention. As shown in FIG. 4, the method includes the following steps:
- Step 401 After receiving the packet from the lower-level base station, the upper-level base station determines whether the destination IP address is the upper-level base station address, and if yes, passes the packet to the corresponding upper-level base station for processing, and ends the process.
- Step 402 Determine whether the cascading switch is turned on when the destination address of the packet does not belong to the base station of the current level. In this step,
- the packet can be delivered to the base station controller, and the process proceeds to step 403.
- the cascading switch is turned off, the data packet is discarded and is not forwarded, and the process ends.
- Step 403 Determine the source base station to which the packet belongs, obtain the IP, MAC address, and other related information of the base station from the cascading information maintenance module, and modify or replace the network layer forwarding according to the frame format of the data packet that the destination base station interface side can receive.
- the IP header format that needs to be modified. If the acquisition fails, the 4 files are discarded, and the process ends.
- Step 404 Perform link layer protocol encapsulation on the data packet, and send a data packet from the E1/T1 port. In this step,
- the data interface conversion module converts the message to be forwarded into a frame format required for E1/T1 port media transmission and then transmits it to the base station controller or RNC.
- the specific conversion method is a conventional method for those skilled in the art, and will not be described here.
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Abstract
L'invention concerne un procédé, un système et un sous-système logique de traitement en cascade pour mettre en oeuvre une mise en cascade de stations de base. Le procédé selon l'invention fait appel à différents moyens pour connecter un contrôleur de station de base (BSC) (4) et une station de base de niveau inférieur (2) des deux côtés d'une station de base de niveau supérieur (1). La station de base de niveau supérieur (1) et le BSC (4) sont connectés par une ligne E1/T1, tandis que la station de base de niveau supérieur (1) et la station de base de niveau inférieur (2) sont connectées par Ethernet; le sous-système logique de traitement en cascade (3) est utilisé pour mettre en oeuvre les fonctions de contrôle de flux et de planification d'encombrement. Le mode de mise en cascade de stations de base selon l'invention permet d'effectuer un partage dynamique de bande passante, de réduire les coûts, d'améliorer la flexibilité de construction du réseau et d'améliorer la capacité des stations de base en cascade.
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CN102281557A (zh) * | 2011-06-10 | 2011-12-14 | 上海华为技术有限公司 | 一种上行流量控制方法、装置、级联设备及基站 |
CN113923789B (zh) * | 2020-07-10 | 2023-08-18 | 中国移动通信集团浙江有限公司 | Lte载波调度装置及方法 |
CN115460614B (zh) * | 2022-08-30 | 2024-09-03 | 中国船舶集团有限公司第七一六研究所 | 一种采用级联方式的便携式可扩展5g系统 |
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CN101651987A (zh) * | 2009-09-09 | 2010-02-17 | 中兴通讯股份有限公司 | 级联基站配置方法、装置和系统 |
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CN101193409B (zh) * | 2007-12-10 | 2011-12-28 | 中兴通讯股份有限公司 | 一种级联基站中定位基站中断故障类型的系统和方法 |
US8050296B2 (en) * | 2008-03-31 | 2011-11-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio equipment (RE)-based synchronization |
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CN101651987A (zh) * | 2009-09-09 | 2010-02-17 | 中兴通讯股份有限公司 | 级联基站配置方法、装置和系统 |
CN102006208A (zh) * | 2010-11-17 | 2011-04-06 | 中兴通讯股份有限公司 | 一种实现基站级联的方法、系统和级联处理逻辑子系统 |
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