Data transmission method, host base station, system and storage medium

Abstract

Disclosed are a data transmission method, a host base station, a communication system and a storage medium, the method comprising: receiving uplink data of a first device through an established transparent bearer, the first device being a relay station or a ToB device, and sending the uplink data to a second device through the transparent bearer, the second equipment is a core network or a ToB server to which the relay station belongs; and receiving downlink data sent by the second device, and sending the downlink data to the first device through the transparent bearer, thereby completing transmission between the first device and the second device. In this way, the defects that a traditional relay scheme is complex in implementation architecture and too high in networking cost can be overcome.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a data transmission method, a host base station, a communication system and a storage medium. Background Art

[0002] In cellular wireless communication systems, data backhaul from base station systems is often limited for various reasons, such as the inability to lay cables in some application scenarios, including mountainous areas, islands, and moving vehicles, such as buses, high-speed trains, and subways. The 3GPP (3rd Generation Partnership Project) standard organization has proposed relay solutions for these application scenarios.

[0003] The architecture of NR (New Radio) relay defined by 3GPP adds the functions of UPF (User Plane Function) equipment to IAB (Integrated Access Backhaul) base station or Donor base station. The functions of core network UPF equipment are integrated into the base station, the core network processing flow is completed in the base station, and then the data is parsed and forwarded.

[0004] However, the 3GPP solution greatly increased operators' network construction costs, prolonged network deployment time, and was not conducive to implementation. Summary of the invention

[0005] Based on this, the embodiments of the present application provide a data transmission method, a host base station, a communication system and a storage medium, which can avoid the disadvantages of complex implementation architecture and high networking costs of traditional relay solutions.

[0006] In a first aspect, the present application provides a data transmission method, which is applied to a donor base station, and the method includes:

[0007] Receiving uplink data of a first device through an established transparent bearer, where the first device is a relay station or a ToB device, and sending the uplink data to the second device through the transparent bearer, where the second device is a core network or a ToB server to which the relay station belongs;

[0008] The downlink data sent by the second device is received, and the downlink data is sent to the first device through the transparent bearer, thereby completing the transmission between the first device and the second device.

[0009] In a second aspect, the present application provides a host base station, which includes: a memory and a processor, the memory is used to store a computer program; the processor is used to execute the computer program and implement the data transmission method as described above when executing the computer program.

[0010] In a third aspect, the present application provides a communication system, which includes a first device, a second device, and the host base station described in the second aspect.

[0011] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor enables the processor to implement the data transmission method as described above.

[0012] The embodiment of the present application provides a data transmission method, a host base station, a communication system and a storage medium. Since the host base station pre-establishes a transparent bearer between the first device and the second device locally, the host base station can send the received uplink data of the first device to the second device through the transparent bearer, and send the received downlink data of the second device to the first device through the transparent bearer, thereby completing the transmission between the first device and the second device. The first device is a relay station or a ToB device, and the second device is a core network or a ToB server to which the relay station belongs. Compared with the related technology, the functions of the core network UPF device are integrated into the base station, the processing flow of the core network is completed in the base station, and then the data is parsed and forwarded. Please refer to the implementation example, there is no need to integrate the functions of the core network UPF device into the base station, and there is no need to complete the core network processing flow at the base station. The host base station only needs to establish a transparent bearer locally in advance, and forward the uplink data of the first device and the downlink data of the second device to the other device through the transparent bearer. In this way, the disadvantages of complex architecture and high networking cost of traditional relay solutions can be avoided, that is, the 3GPP standard relay station bearer establishment process is completely omitted, so the data transmission delay of the relay station or ToB device is greatly reduced; the number of nodes in the user data return path of the relay station is greatly reduced, and the user experience satisfaction of this service is high; the multi-layer wireless bearer establishment process and repeated configuration are avoided, and the processing efficiency is high; there is no need to add data analysis equipment such as Relay GW (Relay Gateway), the network construction cost is greatly reduced, and the networking complexity is greatly reduced; there is no need to add diversion software and hardware, each relay station independently processes the return, avoiding routing detours, etc., so that the network planning has sufficient flexibility. In this way, the problems existing in the wireless bearer establishment process of the relevant 3GPP standard technology, such as multiple parameter configurations, extended call time, complex networking, repeated processing and low efficiency, can be solved, so that the backhaul of the relay station has the same performance and efficiency as the backhaul of the ordinary base station, achieving the optimal network performance and expanding the network application scenarios of the relay station. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the 3GPP NR relay network architecture in the related art;

[0014] Figure 2 This is a flow chart of an embodiment of a data transmission method of the present application;

[0015] Figure 3 It is a flowchart of another embodiment of the data transmission method of the present application;

[0016] Figure 4 It is a flowchart of another embodiment of the data transmission method of the present application;

[0017] Figure 5 It is a flowchart of another embodiment of the data transmission method of the present application;

[0018] Figure 6 It is a structural diagram of an embodiment of a host base station of the present application;

[0019] Figure 7 is a schematic diagram of an embodiment of a communication system of the present application;

[0020] Figure 8 This is a schematic diagram of the identification description in an embodiment of the data transmission method of the present application;

[0021] Fig. 9 It is a schematic diagram of establishing a wireless signaling bearer, a wireless data bearer and a transparent bearer of a UE in an embodiment of a data transmission method of the present application;

[0022] Fig.10 It is a schematic diagram of the networking of a relay station and a host base station in an embodiment of the data transmission method of the present application;

[0023] Fig.11 It is a flowchart of another embodiment of the data transmission method of the present application;

[0024] Fig.12 This is a schematic diagram of changes in the data protocol stack in an embodiment of the data transmission method of the present application;

[0025] Fig.13 This is a schematic diagram of establishing transparent bearer for ToB devices in an embodiment of the data transmission method of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0028] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no special meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0029] Before introducing the embodiments of the present application in detail, the technical contents related to the present application are first introduced.

[0030] In cellular wireless communication systems, data backhaul from base station systems is often limited for various reasons, such as the inability to lay cables in some application scenarios, including mountainous areas, islands, and moving vehicles, such as buses, high-speed trains, and subways. The 3GPP (3rd Generation Partnership Project) standard organization has proposed relay solutions for these application scenarios.

[0031] like Figure 1As shown, the architecture of NR (New Radio) relay defined by 3GPP is to add the function of UPF (UserPlane Function) device in IAB (Integrated Access Backhaul) base station or Donor base station. The function of the core network UPF device is integrated into the base station, the core network processing flow is completed in the base station, and then the data is parsed and forwarded. The uplink relay station sends the data to the IAB base station or the Donor base station through the Uu port. The UPF function integrated in the IAB base station or the Donor base station completes the data decapsulation and the core network NGC (Next Generation Core, i.e., 5G core network) process of the IAB base station or the Donor base station, and then forwards it to the core network to which the relay station belongs. The downlink data of the core network to which the relay station belongs is sent to the IAB base station or the Donor base station. After the UPF module completes the data encapsulation and the core network process of the IAB or Donor base station, it is transmitted back to the relay station through the Uu port of the IAB base station or the Donor base station. In the figure, the IAB base station has the functions of the gNB (5G base station) base station and the MT (Mobile-Termination). However, for the NR relay architecture defined by the 3GPP standard, it is necessary to integrate the core network UPF equipment in the base station, which is equivalent to moving the core network equipment to the base station, which requires a lot of development work. In addition, since the UPF processing increases the performance requirements of the base station too much, high-performance hardware resources are required to meet them, which greatly increases the hardware cost; during deployment, the base station hardware needs to be upgraded, which increases the complexity of operation and maintenance. In summary, the 3GPP solution greatly increases the network construction cost of operators, prolongs the network deployment time, and is not conducive to implementation.

[0032] The embodiment of the present application provides a data transmission method, a host base station, a communication system and a storage medium. Since the host base station pre-establishes a transparent bearer between the first device and the second device locally, the host base station can send the received uplink data of the first device to the second device through the transparent bearer, and send the received downlink data of the second device to the first device through the transparent bearer, thereby completing the transmission between the first device and the second device. The first device is a relay station or a ToB device, and the second device is a core network or a ToB server to which the relay station belongs. Compared with the related technology, the functions of the core network UPF device are integrated into the base station, the processing flow of the core network is completed in the base station, and then the data is parsed and forwarded. Please refer to the implementation example, there is no need to integrate the functions of the core network UPF device into the base station, and there is no need to complete the core network processing flow at the base station. The host base station only needs to establish a transparent bearer locally in advance, and forward the uplink data of the first device and the downlink data of the second device to the other device through the transparent bearer. In this way, the disadvantages of complex architecture and high networking cost of traditional relay solutions can be avoided, that is, the 3GPP standard relay station bearer establishment process is completely omitted, so the data transmission delay of the relay station or ToB device is greatly reduced; the number of nodes in the user data return path of the relay station is greatly reduced, and the user experience satisfaction of this service is high; the multi-layer wireless bearer establishment process and repeated configuration are avoided, and the processing efficiency is high; there is no need to add data analysis equipment such as Relay GW (Relay Gateway), the network construction cost is greatly reduced, and the networking complexity is greatly reduced; there is no need to add diversion software and hardware, each relay station independently processes the return, avoiding routing detours, etc., so that the network planning has sufficient flexibility. In this way, the problems existing in the wireless bearer establishment process of the relevant 3GPP standard technology, such as multiple parameter configurations, extended call time, complex networking, repeated processing and low efficiency, can be solved, so that the backhaul of the relay station has the same performance and efficiency as the backhaul of the ordinary base station, achieving the optimal network performance and expanding the network application scenarios of the relay station.

[0033] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0034] join Figure 2 , Figure 2 It is a flow chart of an embodiment of a data transmission method of the present application. The method is applied in a host base station, and the method includes: step S101 and step S102.

[0035] Step S101: Receive uplink data of a first device through an established transparent bearer, where the first device is a relay station or a ToB device, and send the uplink data to the second device through the transparent bearer, where the second device is a core network or a ToB server to which the relay station belongs.

[0036] Step S102: receiving downlink data sent by the second device, and sending the downlink data to the first device through the transparent bearer, thereby completing the transmission between the first device and the second device.

[0037] The transparent bearer is a direct data channel established by the host base station between the first device and the second device according to the parameter configuration information of the transparent bearer. The parameter configuration information of the transparent bearer has been pre-defined locally in the host base station; wherein the parameter configuration information of the transparent bearer can be defined according to user needs.

[0038] The first device is a relay station or a ToB device, and the second device is a core network or a ToB server to which the relay station belongs. Since the transparent bearer is a direct data channel between the first device and the second device established locally by the host base station, the host base station can send the received uplink data of the first device to the second device through the transparent bearer, and send the received downlink data of the second device to the first device through the transparent bearer, thereby completing the transmission between the first device and the second device.

[0039] The host base station can be equivalent to a transit base station, and the transparent bearer can include a transparent bearer for communication between the first device and the host base station and a transparent bearer for communication between the host base station and the second device; the transparent bearer for communication between the first device and the host base station and the transparent bearer for communication between the host base station and the second device can be established in advance at the same time, or can be established in advance separately.

[0040] Compared with the related art, the functions of the core network UPF device are integrated into the base station, the core network processing flow is completed in the base station, and then the data is parsed and forwarded. In the embodiment of the present application, there is no need to integrate the functions of the core network UPF device into the base station, and there is no need to complete the core network processing flow in the base station. The host base station only needs to establish a transparent bearer locally in advance, and forward the uplink data of the first device and the downlink data of the second device to the other device through the transparent bearer. In this way, the disadvantages of the complex architecture and high networking cost of the traditional relay solution can be avoided, that is, the 3GPP standard relay station bearer establishment process is completely omitted, so the data transmission delay of the relay station or ToB device is greatly reduced; the number of nodes in the user data return path of the relay station is greatly reduced, and the user experience satisfaction of the service is high; avoid multi-layer wireless bearer establishment process and repeated configuration, and the processing efficiency is high; there is no need to add data parsing equipment such as Relay GW (Relay Gateway), the network construction cost is greatly reduced, and the networking complexity is greatly reduced; there is no need to add diversion software and hardware, each relay station independently processes the return, avoids routing detours, etc., so that the network planning has sufficient flexibility. In this way, the problems existing in the wireless bearer establishment process of the relevant 3GPP standard technology, such as multiple parameter configurations, extended call time, complex networking, repeated processing and low efficiency, can be solved, so that the backhaul of the relay station has the same performance and efficiency as the backhaul of the ordinary base station, achieving the optimal network performance and expanding the network application scenarios of the relay station.

[0041] In some embodiments, in step S101, before receiving the uplink data of the first device through the established transparent bearer, the following sub-steps S1011 and S1012 may be included: Figure 3 shown.

[0042] Sub-step S1011: configure an identification description corresponding to the first device.

[0043] Sub-step S1012: Based on the identification description corresponding to the first device, establish a transparent bearer for communicating with the first device and the second device.

[0044] In an embodiment of the present application, an identification description corresponding to the first device is configured in the host base station, and the identification description can be configured according to user needs. The identification description defines parameter configuration information of the transparent bearer. The host base station establishes a transparent bearer for communication between the host base station and the first device and a transparent bearer for communication between the host base station and the second device according to the identification description corresponding to the first device that has been configured.

[0045] In some embodiments, configuring the identification description corresponding to the first device includes:

[0046] Acquire identification information of the first device and parameter configuration information of a transparent bearer corresponding to the identification information of the first device;

[0047] An identification description corresponding to the first device is generated according to the identification information of the first device and parameter configuration information of the transparent bearer corresponding to the identification information of the first device in a preset data format.

[0048] Exemplarily, a preset data format corresponding to the identification description is pre-set, for example, including an identification description header and an extension field, wherein the identification description header includes a transparent bearer ID, a first device identifier, a first device IP address, a service bearer ID, and the like.

[0049] Exemplarily, the identification information of the first device includes an identification with a routing function of the first device. The identification with a routing function of the first device can satisfy the function of identifying the first device on the one hand, and can also satisfy the routing function on the other hand; for example, the identification with a routing function of the first device can include the IP address of the first device. The identification information of the first device and the parameter configuration information of the transparent bearer corresponding to the identification information of the first device are obtained, and an identification description corresponding to the first device is generated according to a preset data format. Among them, the identification description corresponding to the first device includes the identification information of the first device and the parameter configuration information of the transparent bearer corresponding to the identification information of the first device.

[0050] In some embodiments, sub-step S1012, based on the identification description corresponding to the first device, establishing a transparent bearer for communicating with the first device and the second device, may include: sub-steps S10121 to S10124, such as Figure 4 shown.

[0051] Sub-step S10121: Obtain identification information of the first device.

[0052] The donor base station can obtain the identification information of the first device from the first device.

[0053] For example, when the first device accesses the donor base station, the donor base station may be informed of the identification information of the first device.

[0054] Sub-step S10122: Determine an identification description corresponding to the first device that matches the identification information of the first device.

[0055] Sub-step S10123: Determine first parameter configuration information and second parameter configuration information according to the identification description corresponding to the first device.

[0056] Sub-step S10124: According to the first parameter configuration information, a transparent bearer for communicating with the first device is established, and the transparent bearer uses the wireless resources between the first device and the host base station. According to the second parameter configuration information, an identifier with a routing function in the identification information of the first device is configured to a local corresponding wired transmission interface to establish a transparent bearer with the second device.

[0057] The host base station matches and compares the acquired identification information of the first device with the configured identification description, determines the identification description corresponding to the first device that matches the identification information of the first device, and determines the first parameter configuration information and the second parameter configuration information of the transparent bearer corresponding to the identification information of the first device based on the identification description corresponding to the first device. In an embodiment of the present application, the first parameter configuration information is used to establish a transparent bearer for communication between the host base station and the first device, and the second parameter configuration information is used to establish a transparent bearer for communication between the host base station and the second device. The transparent bearer for communication between the host base station and the first device uses the wireless resources between the first device and the host base station. Therefore, in actual applications, the first device can integrate the functions of the user device, or the first device can be connected to the host base station through a user device or a commercial terminal, and the first device and the user device or the commercial terminal can be connected by wire.

[0058] It should be noted that the transparent bearer for communication between the host base station and the first device is established before the host base station receives the uplink data of the first device; the transparent bearer for communication between the host base station and the second device can be established before the host base station receives the uplink data of the first device, or can be established after the host base station receives the uplink data of the first device and before sending the uplink data to the second device.

[0059] In some embodiments, the method may further include: establishing a wireless signaling bearer and a wireless data bearer with the first device.

[0060] The host base station also establishes wireless signaling bearer and wireless data bearer with the first device, which enables the host base station to realize normal base station functions in addition to the transfer function between the first device and the second device, so that the first device and the host base station can communicate normally, and the first device can communicate with the core network to which the host base station belongs.

[0061] In some embodiments, the method may further include: Step S103 to Step S105, such as Figure 5 shown.

[0062] Step S103: After the transparent bearer is established, if the wireless resources currently do not meet the data transmission resource requirements, dynamically adjust the wireless transmission hardware resources used by the transparent bearer so that the adjusted wireless resources meet the data transmission resource requirements;

[0063] Step S104: reconfigure the first parameter configuration information of the transparent bearer according to the adjusted wireless transmission hardware resources, and update the locally stored first parameter configuration information before the reconfiguration to the first parameter configuration information after the reconfiguration.

[0064] Step S105: re-establishing a transparent bearer with the first device locally according to the reconfigured first parameter configuration information.

[0065] Exemplarily, dynamically adjusting the wireless transmission hardware resources used by the transparent bearer includes but is not limited to increasing the number and size of wireless transmission hardware resources. For example, if the wireless resources currently do not meet the flow requirements corresponding to the data transmission, that is, the data transmission requires a larger flow, at this time, the wireless transmission hardware resources used by the transparent bearer are adjusted, such as increasing the number of wireless transmission hardware resource blocks, so that the adjusted wireless resources meet the flow requirements corresponding to the data transmission. In this way, the wireless transmission hardware resources used by the transparent bearer can be dynamically adjusted according to the usage of the wireless resources, and a transparent bearer with the first device can be dynamically established.

[0066] In some embodiments, the identification information of the relay station or the ToB terminal device also includes forwarding information; the method may also include: configuring on the local corresponding wired transmission interface according to the forwarding information and the second parameter configuration information, and using the forwarding information as the local network port network parameter to perform local routing and receiving processing flow.

[0067] In some embodiments, the method may further include: releasing the transparent bearer when it is detected that the first device is disconnected from the local device.

[0068] See also Figure 6 , Figure 6 It is a structural diagram of an embodiment of the host base station of the present application. It should be noted that the host base station of the embodiment of the present application can implement the above-mentioned data transmission method. For detailed description of the relevant content, please refer to the above-mentioned method part, which will not be repeated here.

[0069] The host base station 100 includes: a memory 10 and a processor 20, wherein the memory 10 is used to store a computer program; the processor 20 is used to execute the computer program and implement any of the above-mentioned data transmission methods when executing the computer program. The memory 10 is connected to the processor 20 via a bus.

[0070] The processor 20 may be a microcontroller unit, a central processing unit or a digital signal processor, etc. The memory 10 may be a Flash chip, a read-only memory, a magnetic disk, an optical disk, a USB disk or a mobile hard disk, etc.

[0071] See also Figure 7 , Figure 7 It is a schematic diagram of the architecture of the communication system of the present application, wherein the communication system includes a first device 200, a second device 300 and the host base station 100 as described above.

[0072] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor implements any of the above-mentioned data transmission methods.

[0073] The computer-readable storage medium may be an internal storage unit of the host base station, such as a hard disk or a memory. The computer-readable storage medium may also be an external storage device of the host base station, such as a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, etc.

[0074] The method of the embodiment of the present application is described in detail below with a specific embodiment.

[0075] In an embodiment of the present application, the relay station is connected to the UE (User Equipment) via a wired connection, the relay station is connected to the host base station via the UE, or the ToB device is connected to the commercial terminal via a wired connection, and the ToB device is connected to the host base station via the commercial terminal.

[0076] The core points of the embodiments of the present application are:

[0077] The host base station configures an identification description of the relay station or the ToB device, which can be configured according to user needs. The host base station establishes a dedicated transparent bearer for communication between the relay station and the core network to which the relay station belongs or between the ToB device and the ToB server according to the configured identification description. This transparent bearer is not a wireless bearer type defined by the 3GPP standard, but a bearer defined in an embodiment of the present application, and has the following characteristics:

[0078] (1) Transparent bearer only exists in the host base station. All other devices on the entire communication link, such as relay stations, ToB devices, UEs or the core network to which the relay stations belong, and ToB servers, need to be aware of it. No changes are required in terms of software or hardware.

[0079] (2) The host base station and the relay station or ToB device are not in the same routing autonomous domain;

[0080] (3) Transparent bearer uses the air interface resources of the 3GPP standard radio bearer established between the UE and the host base station, but does not occupy the backhaul resources between the host base station and the core network to which the host base station belongs;

[0081] (4) Transparent bearer does not configure a proxy or mirror of the IP backhauled by the relay station in the host base station;

[0082] (5) Transparent bearer does not change the order of IP messages in relay stations or ToB devices;

[0083] (6) Transparent bearer only modifies the UE's IP message and application protocol header, and does not change the QoS parameter value of the IP message of the relay station or ToB device.

[0084] After the transparent bearer is established, the uplink signaling, services and various data (i.e. uplink data) of the relay station or ToB device are sent to the core network or ToB server to which the relay station belongs through the transparent bearer established by the host base station, and the downlink data from the core network or ToB server to which the relay station belongs to the relay station or ToB device is sent to the host base station, and the host base station forwards the downlink data to the relay station or ToB device through the transparent bearer, thereby completing the communication between the relay station or ToB device and the core network or ToB server to which the relay station belongs. The embodiment of the present application well avoids the disadvantages of the traditional Relay solution, which has a complex implementation architecture and high networking costs.

[0085] Description of the application environment of the embodiment of this application:

[0086] The data transmission method, host base station, communication system and storage medium provided in the embodiments of the present application can realize the use of a simple-designed relay station in a wireless system to expand the coverage of the base station and improve the capacity of the base station.

[0087] Taking the relay station as an example, the data transmission method in the embodiment of the present application includes the following steps:

[0088] 1) The host base station defines the identification description of the relay station and provides the parameter configuration information required for the transparent bearer establishment process. The identification description includes the identification information of the relay station and the corresponding transparent bearer parameter configuration information. The identification information of the relay station includes the IP address of the relay station. The identification information of the relay station also includes other identification information of the relay station. The other identification information of the relay station includes but is not limited to the identification combination of its various service radio bearers, such as Figure 8 As shown, the identification information of the relay station includes an identification header and extended parameter information. The identification header defines the ID of the transparent bearer, the identification of the relay station, the IP address of the relay station, and the ID of the wireless data bearer of the service established by the core network to which the UE and the host base station belong.

[0089] 2) The host base station maps (configures) the IP address of the relay station to the local backhaul wired transmission interface according to the identification description corresponding to the relay station (the identification description can be presented in a table) to establish a transparent bearer for communication between the host base station and the core network to which the relay station belongs.

[0090] 3) The relay station and the UE are connected via a wired cable, or the relay station is integrated with standard terminal functions; all data of the relay station is received and sent through the UE.

[0091] 4) After the UE is turned on, it accesses the host base station according to the access process defined by the standard, and obtains the parameter configuration information of its wireless signaling bearer and wireless data bearer. According to this parameter configuration information, the UE establishes wireless signaling bearers and wireless data bearers for various services locally, completes normal communication negotiation with the core network to which the host base station belongs, and establishes a communication link.

[0092] 5) While the host base station establishes a wireless signaling bearer and a wireless data bearer for the UE, according to the identification description corresponding to the relay station, the host base station and the host base station complete the parameter configuration of the transparent bearer for communication between the relay station and the host base station, and between the host base station and the core network to which the relay station belongs, and establishes a transparent bearer between the relay station and the core network to which the relay station belongs locally, such as Fig. 9 shown.

[0093] 6) When the relay station initiates a service, it first sends the uplink data to the UE. The UE sends the uplink data of the relay station to the host base station in accordance with the normal communication process with the host base station. After receiving the uplink data, the network side of the host base station identifies the relay station according to the identification information of the relay station in the uplink data, removes the relevant information of the UE from the uplink data, and directly sends the uplink data without adding any information through the transparent bearer established for the relay station through the wired transmission interface configured with the IP address of the relay station.

[0094] 7) After the core network to which the relay station belongs processes the uplink data of the relay station, it returns the downlink data to the host base station. After receiving the downlink data, the host base station confirms that it is the data of this station and does not forward it. It searches the identification description corresponding to the relay station to find the corresponding transparent bearer and directly uploads it to the service layer of this station without stripping the IP header. The service layer of this station adds the relevant bearer information of the UE according to the air interface resources described by the transparent bearer and sends the downlink data to the UE through the air interface resources.

[0095] 8) After receiving the downlink data from the relay station, the UE sends the downlink data to the relay station through a wired connection according to its internal standard process, and the communication process is completed.

[0096] 9) When the UE is turned off, all locally established wireless signaling bearers and wireless data bearers of all services are released.

[0097] 10) When the donor base station detects that the UE is disconnected from the donor base station, it releases the wireless signaling bearer, the wireless data bearer of the service and the transparent bearer related to the UE, and releases the air interface resources occupied by them.

[0098] Furthermore, the above method may also have the following characteristics: in the wireless data bearer of the service established by the UE and the host base station, the types of services include any combination of the following services: voice service, streaming media service, interactive service and background service.

[0099] Furthermore, the above method may also have the following characteristics: the transparent bearer may be one or more, and these transparent bearers, in addition to storing their respective identification descriptions and identification information of the transparent bearer on the host base station, do not perform any encapsulation or decapsulation on the data information (uplink data, downlink data) carried by the transparent bearer, and do not change the forwarding information such as the source or destination of the data information (uplink data, downlink data).

[0100] Furthermore, the above method may also have the following characteristics: the identification description includes data forwarding information, such as IP address, etc. These forwarding information needs to be configured on the corresponding wired transmission interface of the host base station, and used as the network port network parameters of the host base station, and participate in the standard processes such as routing, transceiver processing, etc. of the host base station.

[0101] Furthermore, the above method may also have the following characteristics: the parameter configuration information of the wireless signaling bearer includes the following contents: the control plane parameter configuration information of the wireless resource control layer and the inter-layer mapping relationship between the wireless resource control layer and the medium access control layer; the user plane parameter configuration information of the medium access control layer. The establishment and interaction of all wireless signaling bearers and wireless data bearers of services conform to the process defined by the standard.

[0102] Furthermore, the above method may also have the following characteristics: in the step 4), after the UE is turned on, it reads the complete system message from the access cell channel, and does not need to perceive and save any information described by the relay station's identification. Its signaling and data processing fully complies with the process defined in the relevant 3GPP standards.

[0103] Furthermore, the above method may also have the following characteristics: the identification information of the relay station in the identification description of the relay station includes information of parameters such as the IP address of the relay station. When there are multiple relay stations, each UE and the host base station network side independently sends and receives signaling, services and management data of their respective relay stations in accordance with the constraint relationship between the relay station and the host base station in the identification description corresponding to each relay station.

[0104] Furthermore, the above method may also have the following characteristics: in step 6), when the relay station and the core network to which the relay station belongs send and receive all signaling, service, network management and other data through the transparent bearer established for the relay station by the host base station during a service process, the data is also sent and received directly on the transparent bearer established by the identification description corresponding to the relay station.

[0105] Furthermore, the above method may also have the following characteristics: after the transparent bearer for the relay station is successfully established based on the host station, the network can adjust the wireless transmission hardware resources allocated to the transparent bearer according to the real-time wireless resource usage, and reconfigure the parameter configuration information of the existing transparent bearer. After success, the locally stored parameter configuration information is updated with the reconfiguration completed parameter configuration message. Thereafter, the host base station network side and the relay station use the transparent bearer established with the new parameter configuration information to transmit data.

[0106] In summary, the method of the embodiment of the present application establishes the default or predefined parameter configuration information required for the data backhaul process between the relay station and the core network to which the relay station belongs by establishing a transparent bearer for the relay station in combination with the identification description corresponding to the relay station, and completely omits the 3GPP standard relay station bearer establishment process, such as Fig.10 As shown. Therefore, it has the following obvious technical effects:

[0107] Since transparent bearer is established, when data is transmitted between the relay station and the core network to which the relay station belongs, it is not necessary for the host base station to first transmit to the core network to which the host base station belongs, and then the core network to which the host base station belongs to inform the host base station to transfer to the core network to which the relay station belongs, as in the related technology. Instead, the host base station directly transmits to the core network to which the relay station belongs. Therefore, 1) the data transmission delay of the relay station is greatly reduced; 2) the number of nodes in the user data return path of the relay station is greatly reduced, and the user experience satisfaction is high; 3) the multi-layer wireless bearer establishment process and repeated configuration are avoided, and the processing efficiency is high; 4) there is no need to add data parsing equipment such as Relay GW, which greatly reduces the network construction cost and the networking complexity; 5) there is no need to add NE and other diversion software and hardware, and each relay station independently handles the return, avoiding routing detours, etc., so that the network planning has sufficient flexibility.

[0108] Therefore, the method of the embodiment of the present application solves the problems existing in the wireless bearer establishment process of the existing 3GPP standard technology, such as multiple parameter configurations, extended call time, complex networking, repeated processing and low efficiency, so that the backhaul of the relay station has the same performance and efficiency as the backhaul of the ordinary base station, achieves the best network performance, and expands the network application scenarios of the relay station.

[0109] The process of the technical solution of the embodiment of the present application is as follows Fig.11 As shown, the description is as follows:

[0110] Step S10, the host base station network side defines the identification description corresponding to the relay station, and provides the default or predefined parameter configuration information required for the transparent bearer establishment process; the identification description corresponding to the relay station includes the identification information of the relay station and the corresponding transparent bearer parameter configuration information, and the identification description corresponding to the relay station may also include the parameter configuration information of the wireless data bearer of the service; the identification information of the relay station may include an identification with a routing function, and may also include the combination information of multiple identifications of the relay station, and may also include the identification of the transparent bearer, the identification of the wireless data bearer of the service, extended parameter information, and so on.

[0111] For example, the identification information of the relay station is Figure 8 As shown, it includes an identification header and extended parameter information. The identification header defines the ID of the transparent bearer, the identifier of the relay station, the IP address of the relay station, and the ID of the wireless data bearer of the service established by the core network to which the UE and the host base station belong. The extended parameter information uses the TLV (Type-Length-Value) format. TLV can describe the application layer protocol parameters of the UE, such as the source IP address, destination IP address, IP message sequence number, fragmentation, response message, application layer protocol, etc.

[0112] See Table 1, which is an example of a transparent bearer identification description with parameter configuration information:

[0113] Table 1

[0114]

[0115] It can be seen from the above table that in the embodiment of the present application, the transparent bearer control layer parameters include 1 transparent bearer identification number, a relay station identification number (IP address) and extended parameter information.

[0116] The content and related technologies involved in the media access control layer configuration are basically the same.

[0117] The mapping relationship between the transparent bearer and the wireless data bearer is also pre-configured. When the transparent bearer is associated with multiple wireless data bearers, the constraint relationship between the transmission blocks between them is used in the embodiment of the present application. The full set is used, that is, there is no constraint. In practice, there may also be constraints, such as transparent bearer 1 is mapped to a single wireless data bearer 6.

[0118] The above-mentioned identification description is defined in the configuration of the host base station network side. The network side obtains the parameter configuration information of the transparent bearer and the wireless data bearer of various services from the identification description, and establishes the corresponding relationship between the transparent bearer and the wireless data bearer of the corresponding service locally according to this parameter configuration information.

[0119] In step S20, the host base station obtains the IP address of the relay station from the identification description corresponding to the configured relay station, and sequentially configures all IP addresses to the planned local backhaul wired transmission interface, and generates a corresponding routing relationship in the local routing table.

[0120] Step S30: The relay station and the UE are connected via a wired cable, and parameters such as the rates of corresponding ports need to be negotiated and matched during the connection process.

[0121] Step S40, the UE is turned on, and accesses the donor base station according to a standard process, and completes the establishment of a standard wireless signaling bearer and a wireless data bearer for the service with the core network to which the donor base station belongs.

[0122] Furthermore, the UE is powered on and accesses the network, performs cell search and selection, and completes downlink synchronization.

[0123] Furthermore, the UE reads the broadcast message and selects a suitable cell to reside in.

[0124] Furthermore, random access is performed, and the UE establishes uplink synchronization with the donor base station; the UE establishes an RRC (Radio Resource Control) connection with the donor base station.

[0125] Furthermore, the RRC establishment process is triggered by the UE. After the RRC connection is established, the host base station side and the UE side respectively complete the establishment of the SRB1 (Signaling Radio Bearer) bearer (PDCP / RLC, Packet Data Convergence Protocol / Radio Link Control), MAC (Media Access Control) and L1 peer protocol entities.

[0126] Step S50, after the donor base station completes the establishment of the wireless signaling bearer and the wireless data bearer of the service for the UE, it establishes a transparent bearer for communication between the relay station and the donor base station according to the parameter configuration information of the wireless data bearer of the service and the identification description corresponding to the relay station.

[0127] Step S60: The relay station initiates a service and sends uplink data to the UE connected thereto. The UE sends the uplink data to the donor base station, and the donor base station selects a corresponding transparent bearer to send out the uplink data.

[0128] Step 1: After the relay station is powered on, it starts working and sends uplink data to the connected UE, and the UE accesses the wireless cell of the host base station.

[0129] Step 2: After receiving the UE request, the host base station network side searches for the identification description corresponding to the relay station. After finding the identification description of the relay station, one or more transparent bearers are established for the relay station according to the parameter configuration information of the S10 identification description.

[0130] Optionally, different priorities are assigned to different transparent bearers, and data is distributed and processed according to the priorities.

[0131] Optionally, different transparent bearers may carry the same or different service types.

[0132] Step 3: The host base station forwards the uplink data of the relay station to the core network to which the relay station belongs through transparent bearer. After transparent bearer, the changes of the data protocol stack are as follows: Fig.12 As shown, when the UE transmits the data of the relay station, it includes the relay station data, UE service data and the UE air interface protocol stack. The relay station data includes application data (APP) and the IP address of the relay station. The UE service data includes the application protocol and the IP address of the UE. The UE air interface protocol stack includes PDCP, RLC, MAC, and PHY (physical layer); the protocol stack of the transparent bearer established by the host base station for communication between the UE and the host base station includes the relay station data, the transparent bearer and the air interface protocol stack; when the host base station transmits data to the core network to which the relay station belongs, it will divert the data and only transmit the relay station data to the core network to which the relay station belongs.

[0133] The relay station sends a signaling to the MME (Mobility Management Entity) to which the relay station belongs through the transparent bearer established by the UE and the host base station to initiate an S1 connection establishment request to complete the S1 connection establishment. The MME responds to the relay station S1 control plane link establishment request message and forwards the S1 control plane link establishment response message to the SGW / PGW (Serving GateWay / PDN GateWay).

[0134] Furthermore, the SGW / PGW encapsulates the S1 control plane link establishment response message into a GTP-U (GPRS Tunneling Protocol) message, sends it to the host base station, and the host base station forwards it to the UE through a transparent bearer. The UE forwards the S1 control plane link establishment response message to the relay station, and then the relay station completes the cell establishment and enters normal business processing.

[0135] Step S70: After processing the data, the core network to which the relay station belongs sends the downlink data to the donor base station. The donor base station sends the downlink data to the UE via a transparent bearer, and the UE returns the downlink data to the relay station via a wired connection.

[0136] Step S80: The UE is powered off to release the local radio signaling bearer and the radio data bearer of the service.

[0137] Step S90: The donor base station releases the local wireless signaling bearer and the wireless data bearer of the service between the donor base station and the UE, releases the transparent bearer of the relay station, and releases the air interface physical resources.

[0138] Taking a ToB device as an example, the process of another embodiment of the method of the embodiment of the present application is as follows:

[0139] In the application scenario of ToB equipment, commercial terminals are used instead of standard UEs. In some devices that are inconvenient to connect by wire or move within a certain range, the technical solution of this application can be used to solve the problem of data transmission and communication. For example, remote operation of coal mining machines in mining systems, remote physical examinations, remote surgery, and internal organ examinations in medical systems, the last meter or one thousand meter remote control of geological exploration systems, etc., steel industry monitoring, etc. Fig.13 shown.

[0140] In the first step, the host base station defines the identification description corresponding to the ToB device and provides the parameter configuration information required for the transparent bearer establishment process. The identification description contains the identification information of the ToB device and the corresponding transparent bearer parameter configuration information. The identification information of the ToB device includes the IP address of the ToB device and may also include other identification information. The ToB device can be an independent ToB device or a ToB device with integrated terminal functions. The independent ToB device needs to be connected to a commercial terminal via a wired method.

[0141] In the second step, the host base station configures the IP address of the ToB device to the local backhaul wired transmission interface according to the identification description, generates routing table information, and sends and receives data according to the routing table information.

[0142] The third step is that after the terminal is turned on, it accesses the host base station according to the access process defined by the standard. The host base station communicates with the billing system and performs billing.

[0143] In the fourth step, the host base station completes the establishment of a transparent bearer for the ToB device on the network side according to the identification description of the ToB device, that is, locally establishes a transparent bearer for communication between the ToB device and the ToB server.

[0144] In the fifth step, when the ToB device initiates a service, it first sends the uplink data to the terminal. The terminal sends the uplink data of the ToB device to the host base station according to the normal communication process with the host base station. After receiving the data, the network side of the host base station identifies the ToB device based on the identification information of the relay station in the data, and directly sends the data to the ToB server through the transparent bearer established for the ToB device.

[0145] In the sixth step, after the ToB server processes the data of the ToB device, it returns the downlink data to the host base station. After receiving the downlink data, the host base station confirms that it is the data of this station and does not forward it. It searches the identification description to find the corresponding transparent bearer and sends the downlink data to the ToB device through the air interface resources of the transparent bearer.

[0146] In the seventh step, after the terminal receives the downlink data from the ToB device, it sends the downlink data to the ToB device through a wired connection according to its internal standard process, and the communication process is completed.

[0147] In the eighth step, when the terminal is turned off, the locally established wireless signaling bearers and the wireless data bearers of all services are all released.

[0148] In the ninth step, after the host base station detects that the terminal is disconnected from the host base station, it releases the wireless signaling bearer, the wireless data bearer of the service and the transparent bearer related to the terminal, and releases the air interface resources occupied by them.

[0149] Applying the method of the embodiment of the present application will produce the following beneficial effects:

[0150] 1) Due to the establishment of transparent bearer, the data transmission delay of ToB devices is greatly reduced;

[0151] 2) The number of nodes in the return path of user data of ToB devices is greatly reduced, and the user experience satisfaction is high;

[0152] 3) Avoid multi-layer radio bearer establishment process and repeated configuration, and high processing efficiency;

[0153] 4) No need to add data analysis equipment such as Relay GW, which greatly reduces the cost of network construction and the complexity of networking;

[0154] 5) There is no need to add NE and other traffic diversion software and hardware. Each ToB device independently handles the backhaul, avoiding routing detours, making network planning sufficiently flexible.

[0155] In summary, the embodiments of the present application can be applied to the following scenarios:

[0156] 1) Wireless network relay backhaul: For some scenarios where it is difficult or inconvenient to deploy wired transmission resources, wireless relay stations are used for backhaul.

[0157] 2) In the ToB scenario, the backhaul of ToB device data can greatly reduce the backhaul path of the ToB device, save backhaul bandwidth and hardware resources, and shorten latency through the solution of the embodiments of the present application.

[0158] 3) Transmission or return of information and data between devices in sports scenarios, such as high-speed rail, subway, and automobile, and transmission of control instructions.

[0159] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0160] In hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0161] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the present application is not limited thereby. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A data transmission method, characterized in that: Applied in a host base station, the method includes: Receiving uplink data of a first device through an established transparent bearer, where the first device is a relay station or a ToB device, and sending the uplink data to the second device through the transparent bearer, where the second device is a core network or a ToB server to which the relay station belongs; The downlink data sent by the second device is received, and the downlink data is sent to the first device through the transparent bearer, thereby completing the transmission between the first device and the second device.

2. The method according to claim 1, characterized in that Before receiving the uplink data of the first device through the established transparent bearer, the method further includes: Configure an identification description corresponding to the first device; Based on the identification description corresponding to the first device, a transparent bearer for communicating with the first device and the second device is established.

3. The method according to claim 2, characterized in that The configuring the identification description corresponding to the first device includes: Acquire identification information of the first device and parameter configuration information of a transparent bearer corresponding to the identification information of the first device; An identification description corresponding to the first device is generated according to the identification information of the first device and parameter configuration information of the transparent bearer corresponding to the identification information of the first device in a preset data format.

4. The method according to claim 3, characterized in that Establishing a transparent bearer for communicating with the first device and the second device based on the identification description corresponding to the first device, including: Acquire identification information of the first device; Determining an identification description corresponding to the first device that matches the identification information of the first device; Determine first parameter configuration information and second parameter configuration information according to the identification description corresponding to the first device; According to the first parameter configuration information, a transparent bearer is established for communicating with the first device, and the transparent bearer uses the wireless resources between the first device and the host base station. According to the second parameter configuration information, an identifier with a routing function in the identification information of the first device is configured to a local corresponding wired transmission interface to establish a transparent bearer with the second device.

5. The method according to claim 4, characterized in that The method further comprises: A wireless signaling bearer and a wireless data bearer are established with the first device.

6. The method according to claim 4, characterized in that The method further comprises: After the transparent bearer is established, if the wireless resources currently do not meet the data transmission resource requirements, dynamically adjusting the wireless transmission hardware resources used by the transparent bearer so that the adjusted wireless resources meet the data transmission resource requirements; Reconfigure the first parameter configuration information of the transparent bearer according to the adjusted wireless transmission hardware resources, and update the locally stored first parameter configuration information before the reconfiguration to the first parameter configuration information after the reconfiguration; According to the reconfigured first parameter configuration information, a transparent bearer with the first device is re-established locally.

7. The method according to claim 4, characterized in that The identification information of the relay station or the ToB terminal device also includes forwarding information; the method further includes: According to the forwarding information and the second parameter configuration information, configuration is performed on the local corresponding wired transmission interface, and the forwarding information is used as the local network port network parameter to perform the local routing transceiver processing flow.

8. The method according to claim 1, characterized in that The method further comprises: When it is detected that the first device is disconnected from the local area, the transparent bearer is released.

9. A donor base station, characterized in that: The host base station includes: a memory and a processor, the memory is used to store a computer program; the processor is used to execute the computer program and implement the data transmission method according to any one of claims 1-8 when executing the computer program.

10. A communication system, characterized in that: The communication system includes a first device, a second device and the host base station described in claim 9.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor implements the data transmission method according to any one of claims 1 to 8.

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