A wireless backhaul communication processing method and related equipment

Abstract

The embodiment of the present application provides a wireless backhaul communication processing method and related equipment. In the method, after a first network side device determines to add an auxiliary access device to a wireless backhaul device, capability indication information about the wireless backhaul device is sent to the auxiliary access device so that the wireless backhaul device establishes a wireless link with the auxiliary access device.

Description

[0001] This application is a divisional application of the original Chinese application with application number "201810153124.1" and titled "A Wireless Backhaul Communication Processing Method and Related Equipment", wherein the entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The embodiments of the present application relate to the field of wireless communications, and in particular to a wireless backhaul communication processing technology. Background Art

[0003] In a wireless communication system, the wireless backhaul device expands the signal coverage range by forwarding and amplifying the wireless signals sent to or received from the network side device (for example, a base station), and can increase the signal-to-noise ratio when the terminal side device is at the edge of the signal coverage, thereby improving the quality of data transmission.

[0004] In the specification version 10 developed by the 3rd generation partnership project (3GPP) for the long term evolution (LTE) wireless communication system, such as Figure 1 As shown, after the wireless backhaul device is turned on, it first establishes a connection with a network side device through a random access process as an ordinary terminal side device, so as to obtain a list of all cells that the wireless backhaul device is allowed to access. Then, the wireless backhaul device disconnects from the current network side device, selects a cell from the list to re-initiate random access, and sends an indication message to the network side device to which the cell belongs when the connection establishment is completed. The indication message is used to indicate that the device accessing the network side device is a wireless backhaul device, and requests the network side device to configure the transmission time unit for the wireless link of the wireless backhaul device. In addition, the wireless backhaul device also triggers the establishment of an X2 interface and an S1 interface with the network side device. After the wireless backhaul device accesses the network, it obtains the cell identifier from the operations, administration, and maintenance (OAM) system of the wireless backhaul device, so that the wireless backhaul device, as a cell under the network side device, provides signal coverage for the terminal side device.

[0005] In 3GPP specification version 15, the first deployment scenario of the new radio (NR) communication system (also known as the 5G system) discussed was a non-standalone deployment scenario, that is, the first network-side device (such as an LTE base station) serves as the primary access device, and the second network-side device (such as a non-standalone NR base station) serves as the secondary access device, thereby achieving dual connection of the terminal-side device (connecting at least two network-side devices). The introduction of wireless backhaul equipment in the non-standalone deployment scenario can provide backhaul for the data transmitted by the terminal-side device on the secondary access device to improve data transmission performance. Therefore, in the non-standalone deployment scenario, how to connect the wireless backhaul device to the second network-side device is an urgent problem to be solved. Summary of the invention

[0006] In view of the above technical problems, an embodiment of the present application provides a wireless backhaul communication processing method and related equipment.

[0007] A first aspect of the present application provides a wireless backhaul communication processing method, comprising the following contents.

[0008] After the first network side device determines to use the second network side device as the auxiliary access device of the wireless backhaul device, the first information is sent to the second network side device, where the first information includes at least one of the following indication information: whether the wireless backhaul device is accessed, whether the wireless backhaul device is a non-standalone device or an independent standalone device, whether the wireless backhaul device supports full-duplex mode or half-duplex mode, whether the wireless backhaul device supports in-band backhaul function or out-of-band backhaul function, and whether the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer.

[0009] By applying the technical solution provided in the first aspect, after the first network side device determines the auxiliary access device of the wireless backhaul device, it sends capability indication information about the wireless backhaul device to the auxiliary access device so that the wireless backhaul device can establish a wireless link with the auxiliary access device.

[0010] Optionally, the method further includes: the first network side device receives configuration information generated by the second network side device, and the configuration information is used to configure a wireless link between the wireless backhaul device and the second network side device. In this optional implementation, when the second network side device learns that the wireless backhaul device needs to access the second network side device, a wireless link is configured for the wireless backhaul device so that the wireless backhaul device can access the second network side device.

[0011] Optionally, the configuration information includes at least one of a transmission time unit configuration of the radio link and a cell identifier of the wireless backhaul device. This optional implementation lists possible configuration contents in the configuration information.

[0012] Optionally, the method further includes: before the first network side device sends the first information to the second network side device, the first network device receives the second information sent by the wireless backhaul device, and the second information includes at least one of the following indication information: whether the wireless backhaul device is accessed, the wireless backhaul device supports the dual connection function, whether the wireless backhaul device is a non-independent device or an independent device, whether the wireless backhaul device supports full-duplex mode or half-duplex mode, whether the wireless backhaul device supports in-band backhaul function or out-of-band backhaul function, and whether the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer. In this possible implementation, the wireless backhaul device sends a capability indication of the wireless backhaul device to the first network side device, so that the first network side device determines an auxiliary access device for the wireless backhaul device, which is conducive to realizing dual connection in a non-independent scenario.

[0013] Optionally, the method further includes: the first network device receives third information sent by the second network device, wherein the third information indicates an association relationship between the second network side device and a cell of the wireless backhaul device, or an association relationship between a cell of the second network side device and a cell of the wireless backhaul device, or an association relationship between a cell of the second network side device and a cell of the wireless backhaul device. In this optional implementation, the first network side device learns from the second network side device the association relationship when the wireless backhaul device is connected to the second network side device, so that the first network side device optimizes system management.

[0014] The present application provides a wireless backhaul communication processing method according to a second aspect of an embodiment, including the following contents.

[0015] The wireless backhaul device initiates a random access process to the first network side device;

[0016] During the random access process or after the random access process is completed, the wireless backhaul device sends at least one of the following indication information to the first network side device:

[0017] The wireless backhaul device is accessed, the wireless backhaul device supports a dual connection function, the wireless backhaul device is a non-standalone device or an independent standalone device, the wireless backhaul device supports full-duplex mode or half-duplex mode, the wireless backhaul device supports an in-band backhaul function or an out-of-band backhaul function, and the wireless backhaul device supports a data forwarding function above the packet data convergence protocol PDCP layer or a data forwarding function at and below the PDCP layer.

[0018] By applying the technical solution provided in the second aspect, the wireless backhaul device sends a capability indication about the wireless backhaul device to the first network side device, so that the first network side device determines a secondary access device for the wireless backhaul device, which is conducive to realizing dual connection in a non-independent scenario.

[0019] Optionally, if the wireless backhaul device supports a dual connection function, the method further includes: the wireless backhaul device receives configuration information generated by a second network side device, and the configuration information is used to configure a wireless link between the wireless backhaul device and the second network side device. In this optional implementation, the wireless backhaul device can establish a wireless link with the second network side device through the configuration information generated by the second network side device, thereby accessing the second network side device.

[0020] Optionally, the configuration information includes at least one of a transmission time unit configuration of the radio link and a cell identifier of the wireless backhaul device. This optional implementation lists possible configuration contents in the configuration information.

[0021] Optionally, after the wireless backhaul device accesses the second network side device, it notifies the second network side device of the association relationship between the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the wireless backhaul device, so that the second network side device is provided with signal coverage expansion by the wireless backhaul device.

[0022] Optionally, the wireless backhaul device notifies the first network side device of the association relationship, so that the first network side device learns that the wireless backhaul device is connected to the second network side device to provide signal coverage extension.

[0023] The third aspect of the present application provides a wireless backhaul communication processing method, including the following contents.

[0024] The wireless backhaul device receives system information sent by the second network side device, wherein the system information includes at least one of the following indication information: an indication allowing the wireless backhaul device to access, and a random access resource used by the wireless backhaul device when accessing the second network side device; the wireless backhaul device initiates a random access process to the second network side device according to the indication information.

[0025] By applying the technical solution provided in the third aspect, the wireless backhaul device can be connected to the second network side device according to the instructions in the system information of the second network side device.

[0026] Optionally, the method further includes: during the random access process or after the random access process is completed, the wireless backhaul device sends at least one of the following indication information to the second network side device:

[0027] Whether the wireless backhaul device is accessed, whether the wireless backhaul device is a non-standalone device or an independent standalone device, whether the wireless backhaul device supports full-duplex mode or half-duplex mode, whether the wireless backhaul device supports in-band backhaul function or out-of-band backhaul function, and whether the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer.

[0028] In this optional implementation, the wireless backhaul device may send a functional indication to the second network side device, which is helpful for the second network side device to learn the basic situation of the wireless backhaul device, thereby establishing a wireless link.

[0029] Optionally, the method further includes: the wireless backhaul device sends a notification to the second network side device, the notification indicating an association relationship between the second network side device and a cell of the wireless backhaul device, or an association relationship between a cell of the second network side device and a cell of the wireless backhaul device, or an association relationship between a cell of the second network side device and the wireless backhaul device. In an optional implementation, the wireless backhaul device notifies the association relationship when accessing the second network side device, which is conducive to achieving dual connectivity after establishing a wireless link.

[0030] A fourth aspect of an embodiment of the present application provides a wireless backhaul device, including the following contents.

[0031] The second network side device sends system information, and the system information includes at least one of the following indication information: an indication of allowing the wireless backhaul device to access, and a random access resource used by the wireless backhaul device when accessing the second network side device; the second network side device and the wireless backhaul device perform a random access process according to the indication information.

[0032] By applying the technical solution provided in the fourth aspect, the second network side device allows the wireless backhaul device to access the second network side device by indicating in the system information that the wireless backhaul device is allowed to access and the random access resources used for access. This allows the wireless backhaul device to access the second network side device.

[0033] Optionally, the method further includes: after the random access process or after the random access process is completed, the second network side device receives at least one of the following indication information sent by the wireless backhaul device:

[0034] The wireless backhaul device is accessed, the wireless backhaul device is a non-standalone device or an independent standalone device, the wireless backhaul device supports full-duplex mode or half-duplex mode, the wireless backhaul device supports in-band backhaul function or out-band backhaul function, the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer. In this optional implementation, the wireless backhaul device sends a capability indication about the wireless backhaul device to the second network side device, so that the second network side device establishes a wireless link with the wireless backhaul device, which is conducive to realizing dual connection in a non-independent scenario.

[0035] Optionally, the method further includes: during the random access process or after the random access process is completed, the second network side device receives a notification sent by the wireless backhaul device, the notification indicating an association relationship between the second network side device and a cell of the wireless backhaul device, or an association relationship between the cell of the second network side device and a cell of the wireless backhaul device, or an association relationship between the cell of the second network side device and the wireless backhaul device. In this optional implementation, the wireless backhaul device notifies the association relationship when accessing the second network side device, which is conducive to achieving dual connectivity after establishing a wireless link.

[0036] Optionally, the method further includes: the second network side device sends a notification to the first network side device, the notification indicating an association relationship between the second network side device and a cell of the wireless backhaul device, or an association relationship between a cell of the second network side device and a cell of the wireless backhaul device, or an association relationship between a cell of the second network side device and the wireless backhaul device. In this optional implementation, the second network side device notifies the first network side device of the association relationship when the wireless backhaul device accesses the second network side device, which is conducive to achieving dual connectivity.

[0037] The fifth aspect of the embodiment of the present application provides a network side device, wherein the network side device includes: a receiving unit, a processing unit and a sending unit. Among them, the receiving unit is used to perform the receiving action of the first aspect to each possible implementation method, and the fourth aspect to any one of the possible implementation methods, the processing unit is used to perform the first aspect to each possible implementation method, and the fourth aspect to any one of the possible implementation methods, and the sending unit is used to perform the first aspect to each possible implementation method, and the fourth aspect to any one of the possible implementation methods. Sending and other actions. In a specific physical implementation, the receiving unit can be a receiving circuit or a receiver, the processing unit can be a processing circuit or a processor, and the sending unit can be a sending circuit or a transmitter. Optionally, the network side device can be an independent network device, or it can be a chip or a circuit system in the network side device, and the chip or the circuit system contains multiple gate circuits to realize the functions of the aforementioned functional units. The network side device provided in the fifth aspect can realize the beneficial effects achieved by any of the aforementioned first aspect to each possible implementation method of the first aspect, and any of the fourth aspect to any one of the possible implementation methods, and will not be repeated in detail.

[0038] The sixth aspect of the embodiment of the present application provides a wireless backhaul device, wherein the wireless backhaul device includes: a receiving unit, a processing unit and a sending unit. The receiving unit is used to perform the receiving action of the second aspect to each possible implementation, and the third aspect to any one of the possible implementations, the processing unit is used to perform the first aspect to each possible implementation, and the third aspect to any one of the possible implementations, and the sending unit is used to perform the first aspect to each possible implementation, and the third aspect to any one of the possible implementations. The sending unit is used to perform the first aspect to each possible implementation, and the third aspect to any one of the possible implementations. Sending and other actions. In a specific physical implementation, the receiving unit can be a receiving circuit or a receiver, the processing unit can be a processing circuit or a processor, and the sending unit can be a sending circuit or a transmitter. Optionally, the network side device can be an independent network device, or it can be a chip or a circuit system in the network side device, and the chip or the circuit system contains multiple gate circuits to realize the functions of the aforementioned functional units. The network side device provided in the sixth aspect can realize the beneficial effects achieved by the aforementioned first aspect to each possible implementation of the first aspect, and the third aspect to any one of the possible implementations, and will not be repeated in detail.

[0039] The seventh aspect of the embodiment of the present application provides a network side device, and the network side device includes: a sending unit and a receiving unit. The sending unit is used to perform the sending action in any one of the possible implementation methods of the second aspect to the second aspect, and the receiving unit is used to perform the receiving action in any one of the possible implementation methods of the second aspect to the second aspect. In a specific physical implementation, the sending unit may be a sending circuit, and the receiving unit may be a receiving circuit. Optionally, the network side device may be an independent network side device (such as a base station), or it may be a chip or a circuit system in the network side device, and the chip or the circuit system contains multiple gate circuits to implement the functions of the aforementioned functional units. The communication processing device provided in the fourth aspect can achieve the beneficial effects achieved by any one of the possible implementation methods of the second aspect to the second aspect, and the details will not be repeated.

[0040] The eighth aspect of the embodiment of the present application provides a communication processing device, comprising a processor and a memory, wherein the memory stores instruction codes, and when the code is called by the processor, the method described in the first aspect, the second aspect, the third aspect, the fourth aspect and any one of the possible implementations is implemented. Optionally, the communication processing device provided in the eighth aspect can be a chip system, or a network side device or a wireless backhaul device including the chip system. The communication processing device provided in the fifth aspect can achieve the beneficial effects achieved by the aforementioned various aspects and any one of the possible implementations, and the details will not be repeated.

[0041] The ninth aspect of the present application provides a computer storage medium, in which a code is stored, and the code is used to implement the method as described in any of the aforementioned aspects and possible implementations. The computer storage medium provided in the ninth aspect may be included in a chip system, or a network-side device or wireless backhaul device including the chip system. The computer storage medium provided in the sixth aspect can achieve the beneficial effects achieved by any of the aforementioned aspects and possible implementations, and the specific details will not be repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the interaction between a wireless backhaul device accessing a wireless communication system provided in an embodiment of the present application.

[0043] Figure 2A A schematic diagram of a system architecture provided for the first embodiment of the present application.

[0044] Figure 2B In the first embodiment of this application, based on Figure 2A Schematic diagram of system interaction under the system architecture shown.

[0045] Figure 2CThis is a possible implementation method of sending indication information by the wireless backhaul device in the first embodiment of the present application.

[0046] Figure 2D This is another possible implementation method in which the wireless backhaul device sends the indication information in the first embodiment of the present application.

[0047] Figure 3A A schematic diagram of a system architecture provided for the second embodiment of the present application.

[0048] Figure 3B In the second embodiment of this application, based on Figure 3A Schematic diagram of system interaction under the system architecture shown.

[0049] Figure 4A A schematic diagram of a system architecture provided for the third embodiment of the present application.

[0050] Figure 4B In the third embodiment of this application, based on Figure 4A Schematic diagram of system interaction under the system architecture shown.

[0051] Figure 4C The third embodiment of the present application is based on Figure 4A A schematic diagram of a protocol stack architecture.

[0052] Figure 4D In the third embodiment of this application, based on Figure 4A Schematic diagram of another protocol stack architecture.

[0053] Figure 5A A schematic diagram of a system architecture provided for the fourth embodiment of the present application.

[0054] Figure 5B In the fourth embodiment of this application, based on Figure 5A Schematic diagram of system interaction under the system architecture shown.

[0055] Figure 5C The fourth embodiment of the present application provides Figure 5A A schematic diagram of a protocol stack architecture.

[0056] Figure 6 A schematic diagram of a unit structure of a communication processing device is provided for the fifth embodiment of the present application.

[0057] Figure 7 A schematic diagram of the hardware structure of a communication processing device provided in the fifth embodiment of the present application. DETAILED DESCRIPTION

[0058] In various embodiments of the present application, the wireless communication system includes a network side device and a wireless backhaul device, and optionally also includes a terminal side device and a core network side device (including a core network control plane device and a core network user plane device). Among them, the network side device can be various transmission reception points (TRP) such as a base station and a wireless LAN access point, providing access services under a licensed spectrum or access services under an unlicensed spectrum. The network side device is connected to the core network side device by wired or wireless means. The wireless backhaul device can be a base station or a wireless LAN access point, which is used to provide data backhaul. The network side device can directly provide services for the terminal side device, or it can provide services for the terminal side device through the wireless backhaul device. The link between the network side device and the wireless backhaul device is a wireless link, and the link between the wireless backhaul device and the terminal side device is an access link. In the LTE system, the wireless backhaul device is also called a relay. In the NR system, the wireless backhaul device is also called an integrated access and backhaul (IAB) node. Among them, in the LTE system, the base station is an evolved node B (eNB); in the NR system, the base station is a next generation node B (gNB). The network side device and the wireless backhaul device or the terminal side device can communicate according to the protocol layer, and these protocol layers include but are not limited to: physical (PHY) layer, media access control (MAC) layer, radio link control (RLC), packet data convergence protocol (PDCP) layer and radio resource control (RRC) layer. Optionally, a non-access stratum (NAS) layer is also included between the wireless backhaul device or the terminal side device and the core network side device.

[0059] The network side device can be used as an independent device, or it can be split into different devices according to the protocol layer. For example, after the network side device is split according to the protocol layer, the network side device may include a control unit (CU) and at least one distributed unit (DU). The CU is used to implement the functions of the PDCP layer, RRC layer and the protocol layers above the network side device; the DU is used to implement the functions of the RLC layer, MAC layer and PHY layer of the network side device. Those skilled in the art can understand that for each of the following implementation methods, the functions of the network side device at the PDCP layer, RRC layer or the protocol layers above can be performed by the CU; the functions of the network side device at the RLC layer, MAC layer or PHY layer are performed by the at least one DU.

[0060] In various embodiments of the present application, from the perspective of physical implementation, the wireless backhaul device may be a base station, a wireless LAN access point itself, or a chip or circuit system in the base station or the wireless LAN access point; the network side device may be a base station, a wireless LAN access point itself, or a chip or circuit system in the base station or the wireless LAN access point. The network side device includes a non-independent network side device and an independent network side device.

[0061] The wireless backhaul device can be connected to the non-independent network side device and the independent network side device at the same time, thereby realizing dual connection. However, since the non-independent network side device indicates in the system message that the terminal side device is prohibited from residing, the wireless backhaul device cannot reside either, and thus the wireless backhaul device cannot access the network, resulting in the inability to provide data backhaul for the terminal side device.

[0062] The first embodiment of the present application provides a wireless backhaul communication processing method, such as Figure 2A The system architecture diagram shown in the figure and Figure 2B The system interaction diagram shown includes the following contents: In this embodiment, the wireless backhaul device establishes a wireless link with the second network side device, and is connected to the core network side device of the network where the first network side device is located through the second network side device and the first network side device.

[0063] 201. A wireless backhaul device initiates a random access process to a first network side device.

[0064] 202. During the random access process or after the random access process is completed, the wireless backhaul device sends at least one of the following indication information to the first network side device:

[0065] The wireless backhaul device is accessed, the wireless backhaul device supports a dual connection function, the wireless backhaul device is a non-independent device or an independent device, the wireless backhaul device supports full-duplex mode or half-duplex mode, the wireless backhaul device supports an in-band backhaul function or an out-of-band backhaul function, and the wireless backhaul device supports a data forwarding function above the packet data convergence protocol PDCP layer or a data forwarding function at and below the PDCP layer.

[0066] An independent device means that the device can exist independently, can be accessed by terminal devices, and can provide end-to-end connectivity of the control plane and user plane for terminal devices. A non-independent device means that the device cannot exist independently and can only provide services to terminal devices together with independent devices. Non-independent devices do not allow idle terminal devices to reside, nor do they allow idle terminal devices to initiate random access in the cell of non-independent devices.

[0067] Full-duplex mode means that the wireless backhaul device supports simultaneous sending and receiving operations; half-duplex mode means that the wireless backhaul device does not support simultaneous sending and receiving operations, that is, the wireless backhaul device either performs a receiving operation or a sending operation at a time. The wireless backhaul device can specifically use Boolean type indication information to indicate whether it is full-duplex: if the Boolean type is yes, it is full-duplex; if the Boolean type is no, it defaults to half-duplex. Alternatively, the wireless backhaul device uses enumeration type indication information {full-duplex, half-duplex} to select one to indicate whether it is currently full-duplex or half-duplex.

[0068] The in-band backhaul function means that the wireless link between the wireless backhaul device and the connected network side device and the wireless link for accessing the terminal side device operate at the same or adjacent (the frequency difference is less than a certain threshold) frequency; the out-of-band backhaul function means that the wireless link between the wireless backhaul device and the connected network side device and the wireless link for accessing the terminal side device operate at different frequencies or the frequency difference is greater than a certain threshold. The wireless backhaul device can specifically use Boolean type indication information to indicate whether it is an in-band backhaul function: if the Boolean type is yes, it is an in-band backhaul function; if the Boolean type is no, it is an out-of-band backhaul function. Alternatively, the wireless backhaul device uses the enumeration type indication information {in-band backhaul, out-of-band backhaul} to select one to indicate whether it is currently an in-band backhaul function or an out-of-band backhaul function.

[0069] The data forwarding function above the PDCP layer refers to data forwarding based on PDCP service data unit (SDU) or IP packet, which belongs to the L3 wireless backhaul equipment specified in the 3GPP standard; the data forwarding function at and below the PDCP layer refers to data forwarding based on PDCP protocol data unit (PDU) or RLC PDU, etc., which belongs to the L2 wireless backhaul equipment specified in the 3GPP standard. The wireless backhaul device can specifically use Boolean type indication information to indicate whether it is an L2 wireless backhaul device: if the Boolean type is yes, it is an L2 wireless backhaul device; if the Boolean type is no, it is an L3 wireless backhaul device. Alternatively, the wireless backhaul device uses the enumeration type indication information {L2, L3} to select one to indicate whether it is currently an L2 wireless backhaul device or an L3 wireless backhaul device.

[0070] In 201, the wireless backhaul device initiates a random access process to the first network side device, and through the random access process, the wireless backhaul device establishes an RRC connection with the first network side device. Furthermore, the wireless backhaul device establishes a control plane connection with the first network side device and a core network control plane device of the network where the first network side device is located; the wireless backhaul device establishes a user plane connection with the first network side device and a core network user plane device of the network where the first network side device is located. Among them, the core network user plane device that provides services for the wireless backhaul device can be built into the first network side device, or can be placed outside the first network side device.

[0071] In 202, the wireless backhaul device can learn that the device connected to the first network side device is a wireless backhaul device through the indication information sent to the first network side device, and can learn the capability information of the wireless backhaul device, such as whether it supports the dual connection function, whether it is an independent device or a non-independent device, whether it supports full duplex or half duplex, whether it supports in-band or out-of-band backhaul function, whether it supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function below the PDCP layer, etc. Optionally, if the wireless backhaul device supports the dual connection function of LTE-NR, the first network side device is of LTE standard, the second network side device is of NR standard, and the core network device connected to the first network device is an LTE core network device, and the second network side device is connected to the LTE core network side device through the first network side device. In the networking mode of the first embodiment, the second network side device will not be connected to the NR core network device. Among them, whether the dual connection function is supported can be: whether the dual connection function of LTE-NR is supported, or whether the dual connection function of NR-NR is supported, or whether the dual connection function of LTE-LTE is supported, etc.

[0072] Alternatively, if Figure 2C As shown, the at least one indication information may be carried in an RRC message and sent by the wireless backhaul device to the first network side device, and the first network side device may parse the RRC message to obtain the at least one indication information.

[0073] Alternatively, if Figure 2D As shown, the at least one indication information may also be carried in a non-access stratum (NAS) layer message. Since the first network side device does not have a NAS layer, the first network side device transparently transmits the NAS layer message to the core network side device of the network where the first network side device is located, and the core network side device parses the indication information from the NAS layer message, and then sends the indication information (for example, an S1 interface or NG interface message carried between the first network device and the core network side device) to the first network side device, wherein the NG interface is the interface between the network side device and the core network side device in the NR system.

[0074] 203, the first network side device determines to use the second network side device as a secondary access device for providing a dual connection service for the wireless backhaul device, and sends at least one indication information to the second network side device:

[0075] Whether the wireless backhaul device is accessed, whether the wireless backhaul device is a non-standalone device or an independent standalone device, whether the wireless backhaul device supports full-duplex mode or half-duplex mode, whether the wireless backhaul device supports in-band backhaul function or out-of-band backhaul function, and whether the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer.

[0076] Optionally, the at least one item of indication information may be carried in a secondary access device adding request message, such as SgNBAddition Request, so that the second network side device knows that it is a secondary access device serving as the wireless backhaul device.

[0077] Optionally, the first network side device is a primary access device, and the second network side device is a secondary access device; accordingly, the cell of the first network side device belongs to a primary cell group, and the cell of the second network side device belongs to a secondary cell group. The primary cell group includes a primary cell and at least one secondary cell; the secondary cell group includes a primary cell and at least one secondary cell in a secondary cell group.

[0078] Optionally, the first network side device is an independent network side device, and the second network side device is a non-independent network side device.

[0079] Optionally, after the wireless backhaul device establishes a connection with the first network side device through a random access process, the first network side device may send a measurement configuration to the wireless backhaul device, wherein the measurement configuration indicates the frequency of the cell under at least one network side device to be measured. The wireless backhaul device performs measurement according to the measurement configuration, and reports the measurement result of the cell under the at least one network side device to the first network side device. The first network side device selects a network side device as the second network side device according to the measurement result for access by the wireless backhaul device. Among them, the second network side device and the first network side device may belong to the same network standard or different network standards. Belonging to the same network standard, for example: the second network side device and the first network side device both adopt the LTE standard, or both adopt the NR standard, or belonging to different network standards, for example: the second network side device adopts the NR standard, and the first network side device adopts the LTE standard, etc. The eNB as a master access device can be represented as mastereNB (MeNB), and the gNB as a secondary access device can be represented as secondary gNB (SgNB).

[0080] 204. The second network side device sends, to the first network side device, configuration information generated by the second network side device and used to configure a wireless link between the wireless backhaul device and the second network side device.

[0081] Optionally, the configuration information can be carried in a secondary access device addition response message, such as SgNB AdditionRequest Acknowledge, so that the first network side device is informed of the second network side device's approval of the request for secondary access addition.

[0082] Optionally, the configuration information includes one or a combination of the following: a transmission time unit configuration of the wireless link, a cell identifier of the wireless backhaul device. The transmission time unit of the wireless link specifically refers to the time available for the wireless link to transmit data, and the unit may be milliseconds, or a time domain symbol, or a time slot, etc.

[0083] Optionally, the second network side device also indicates to the first network side device the association relationship between the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the wireless backhaul device. Among them, this association relationship can be reflected as the cell identifier of the wireless backhaul device. The cell of the wireless backhaul device is used as a cell under the second network side device, that is, the cell identifier of the wireless backhaul device and the cell identifier of the second network side device both contain the same network side device identifier (for example, a base station identifier). Therefore, after the first network side device receives the cell identifier of the wireless backhaul device sent by the second network side device, it can be known that the cell of the wireless backhaul device is a cell under the second network side device based on the network side device (for example, a base station) identifier contained in the cell identifier of the wireless backhaul device.

[0084] 205. The first network side device sends the configuration information to the wireless backhaul device.

[0085] Optionally, the configuration information may be carried in an RRC message (eg, RRC connection reconfiguration) and sent to the wireless backhaul device.

[0086] Optionally, when the configuration information does not include the cell identifier of the wireless backhaul device, the wireless backhaul device may notify the network management system that it provides wireless backhaul services for the second network side device, so that the network management system (e.g., OAM) allocates the cell identifier to the wireless backhaul device, that is, the wireless backhaul device obtains the allocated cell identifier from the network management system. The wireless backhaul device may notify the first network side device and the second network side device of the acquired cell identifier respectively; or, the wireless backhaul device notifies the first network side device of the acquired cell identifier, and the first network side device further notifies the second network side device; or, the wireless backhaul device notifies the second network side device of the acquired cell identifier, and the second network side device further notifies the first network side device.

[0087] The wireless backhaul device notifies the second network side device of the acquired cell identifier, and the second network side device may be notified by triggering the process of establishing an X2 interface with the second network side device after the wireless backhaul device accesses the second network side device. The second network side device notifies the first network side device of the cell identifier of the wireless backhaul device, and this may be achieved by the second network side device triggering a process of performing a base station configuration update with the first network side device.

[0088] 206. The wireless backhaul device establishes a wireless link with the second network side device according to the configuration information.

[0089] By applying the technical solution provided in the first embodiment of the present application, the wireless backhaul device can access the first network side device and complete authentication and authorization with the core network device of the network where the first network side device is located. When the first network side device knows that the wireless backhaul device supports the dual connection function (or supports the wireless backhaul function of different access technologies), the second network side device is configured as an auxiliary access device to the wireless backhaul device to realize the dual connection of the wireless backhaul device.

[0090] The second embodiment of the present application provides a wireless backhaul communication processing method, such as Figure 3A The system architecture diagram shown and Figure 3B The system interaction diagram shown includes the following contents: In this embodiment, the wireless backhaul device establishes a wireless link with the second network side device, and is connected to the core network side device of the network where the second network side device is located through the second network side device.

[0091] 301. The second network side device sends system information, where the system information includes at least one of the following indication information: an indication of allowing a wireless backhaul device to access, and a random access resource used by the wireless backhaul device when accessing the second network side device.

[0092] In 301, the indication information in the system information indicates that only wireless backhaul devices are allowed to access. Therefore, non-wireless backhaul devices, such as all terminal side devices before 3GPP standard specification version 15 and version 15, cannot access the second network side device.

[0093] Optionally, the system information is carried in a master information block (MIB) or a system information block (SIB), such as SIB1.

[0094] 302. The wireless backhaul device receives the system information and initiates a random access process according to the indication information.

[0095] 303, during the random access process or after the random access process is completed, the wireless backhaul device sends at least one of the following indication information to the second network side device:

[0096] Whether the wireless backhaul device is accessed, whether the wireless backhaul device is a non-standalone device or an independent standalone device, whether the wireless backhaul device supports full-duplex mode or half-duplex mode, whether the wireless backhaul device supports in-band backhaul function or out-of-band backhaul function, and whether the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer.

[0097] Optionally, the method further comprises:

[0098] 304, the wireless backhaul device sends a notification to the second network side device, the notification indicating the association relationship between the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the wireless backhaul device. This association relationship can be reflected as the cell identifier of the wireless backhaul device. The cell of the wireless backhaul device is used as a cell under the second network side device, that is, the cell identifier of the wireless backhaul device and the cell identifier of the second network side device both contain the same network side device identifier. Therefore, after the second network side device receives the cell identifier of the wireless backhaul device sent by the wireless backhaul device, it can be known that the cell of the wireless backhaul device is a cell under the second network side device based on the network side device identifier contained in the cell identifier of the wireless backhaul device.

[0099] The wireless backhaul device notifies the second network side device of the acquired cell identifier, and may notify the second network side device by triggering the process of establishing an X2 interface with the second network side device after the wireless backhaul device accesses the second network side device.

[0100] 305. The second network side device notifies the first network side device of the association relationship in the notification.

[0101] Optionally, the second network side device notifies the association relationship in a network side configuration update sent to the first network side device. This association relationship can be reflected as a cell identifier of the wireless backhaul device. For example, the second network side device notifies the first network side device of the cell identifier of the wireless backhaul device, which can be achieved by the second network side device triggering a process of performing a network side configuration update with the first network side device.

[0102] 306. The first network-side device saves the association relationship in the received notification.

[0103] Optionally, after the first network side device saves the association relationship, a configuration response of the network side device may be sent to the second network side device.

[0104] In this embodiment, the core network device that provides services for the wireless backhaul device is a core network device of the network where the second network side device is located. The user plane device of the core network can be built into the second network side device, or the user plane device and control plane device of the core network are both built into the second network side device.

[0105] By applying the technical solution provided in the second embodiment of the present application, the wireless backhaul device can be directly connected to the second network side device without going through the first network side device to establish a wireless link.

[0106] The third embodiment of the present application provides a wireless backhaul communication processing method, such as Figure 4A The system architecture diagram shown and Figure 4B The system interaction diagram shown includes the following contents. In this embodiment, the wireless backhaul device establishes a wireless link with the second network side device, and through the second network side device, the first network side device is connected to the core network side device of the network where the first network side device is located. Optionally, the first network side device is an independent network side device, and the second network side device is a non-independent network side device. Optionally, the first network side device is an LTE standard, the second network side device is an NR standard, and the second network side device is connected to the LTE core network side device through the first network side device. In the networking method of this embodiment, the second network side device will not be connected to the NR core network device.

[0107] 401. The second network side device sends system information, where the system information includes at least one of the following indication information: an indication of allowing a wireless backhaul device to access, and a random access resource used by the wireless backhaul device when accessing the second network side device.

[0108] In 401, the indication information in the system information indicates that only wireless backhaul devices are allowed to access. Therefore, non-wireless backhaul devices, such as all terminal side devices of 3GPP standard specification version 15 and before, cannot access the second network side device.

[0109] Optionally, the system information is carried in a master information block, or may be carried in a system information block, such as SIB1.

[0110] 402. The wireless backhaul device initiates a random access process to the second network side device according to the system information, and sends at least one of the following indication information to the second network side device during or after the random access process is completed:

[0111] whether the wireless backhaul device is accessed, whether the wireless backhaul device is a non-standalone device, whether the wireless backhaul device supports dual-connection wireless backhaul function, whether the wireless backhaul device supports full-duplex or half-duplex mode, whether the wireless backhaul device supports in-band backhaul function or out-of-band backhaul function, whether the wireless backhaul device supports data forwarding function above the packet data convergence protocol PDCP layer or data forwarding function at and below the PDCP layer.

[0112] 403, the second network side device selects a first network side device for the wireless backhaul device, and sends the at least one indication information to the first network side device.

[0113] In 403, the first network side device selected by the second network side device for the wireless backhaul device is a network side device that allows the wireless backhaul device to access, for example: the first network side device has a built-in core network user plane device that provides services for the wireless backhaul device. The first network side device selects a core network device that provides services for the wireless backhaul device according to the indication information, wherein the core network device is a core network device of the network where the first network side device is located. As a possible implementation, Figure 4CIn the protocol stack architecture diagram shown in the figure, after receiving the random access request sent by the wireless backhaul device, the second network side device can encapsulate the NAS message of the wireless backhaul device in the first interface message (e.g., X2 interface (X2AP) message) with the first network side device and send it to the first network side device, the first network side device extracts the NAS message from the first interface message, and generates a second interface message (e.g., S1 interface (S1AP) message) between the first network side device and the core network side device where the first network side device is located according to the first interface message, and re-encapsulates the NAS message in the second interface message and sends it to the core network side device, so that the core network side device parses the NAS message of the wireless backhaul device according to the second interface message, thereby realizing the connection between the wireless backhaul device and the core network side device. Wherein, SCTP is the abbreviation of stream control transmission protocol layer, IP is the abbreviation of internet protocol (IP) layer, L1 layer is physical layer, and L2 layer is data link layer. For example, the L1 layer is the physical layer defined by the open system interconnection reference model (OSI), and the L2 layer is the data link layer (DLL) defined by OSI.

[0114] As another possible implementation, Figure 4D According to the protocol stack architecture diagram shown in the figure, after receiving the random access request sent by the wireless backhaul device, the second network side device can generate an S1 interface message between the first network side device and the core network device of the network where the first network side device is located according to the RRC message encapsulating the NAS message of the wireless backhaul device, and send the S1 interface message encapsulating the NAS message to the first network side device by carrying it in the X2 interface message of the first network side device. After receiving the X2 interface message, the first network side device extracts the S1 interface message from it and forwards the S1 interface message to the core network device of the network where the first network side device is located, so that the core network device can parse the NAS message of the wireless backhaul device from the interface message, thereby realizing the connection between the wireless backhaul device and the core network side device.

[0115] In this embodiment, the second network device is a non-independent network device, and the second network side device will not be connected to the core network device of the network where the second network side device is located.

[0116] By applying the technical solution provided in the third embodiment of the present application, the second network side device (especially the non-independent network side device) can serve as an access device of the wireless backhaul device, and be connected to the core network device of the network where the first network side device is located through the first network side device, thereby realizing the network access process of the wireless backhaul device.

[0117] A fourth embodiment of the present application provides a wireless backhaul communication processing method, such as Figure 5A The system architecture diagram shown and Figure 5B The system interaction diagram shown includes the following contents.

[0118] 501. The terminal side device establishes an RRC connection with the first network side device through a random access process.

[0119] 502, the first network side device sends a measurement configuration to the terminal side device, and selects a wireless backhaul device as an auxiliary access device of the terminal side device according to the measurement results reported by the terminal side device, wherein the first network side device is the main access device of the terminal side device.

[0120] In 502, optionally, the first network side device and the wireless backhaul device may belong to the same network standard or different network standards. The same network standard, for example, the first network device and the wireless backhaul device both adopt the LTE standard, or both adopt the NR standard. The different network standards, for example, the first network device adopts the LTE standard, and the wireless backhaul device adopts the NR standard, etc.

[0121] The first network side device can also select a second network side device for the wireless backhaul device based on the measurement result. Specifically, the first network side device finds the corresponding second network side device based on the cell identifier of the wireless backhaul device reported by the terminal side device and the previously acquired association relationship between the wireless backhaul device and the second network side device. For example: based on the network side device identifier contained in the cell identifier of the wireless backhaul device, it can be known that the cell of the wireless backhaul device is a cell under the second network side device.

[0122] 503, the first network side device sends an auxiliary access device addition request message, for example (SgNB Addition Request), to the wireless backhaul device through the second network side device to which the wireless backhaul device is connected, to request the wireless backhaul device to serve as an auxiliary access device of the terminal side device.

[0123] 504. The wireless backhaul device sends a secondary access device addition response message, such as (SgNB Addition Request Acknowledge), to the first network side device through the second network side device. The response message includes the wireless resource configuration between the wireless backhaul device and the terminal side device.

[0124] Through steps 503 and 504, a GTP tunnel corresponding to the user data bearer is established between the first network side device and the second network side device for the terminal side device. At the same time, a GTP tunnel corresponding to the user data bearer is also established between the second network side device and the wireless backhaul device for the terminal side device, and the two GTP tunnels are one-to-one corresponding, such as Figure 5C As shown in FIG. 1 , GTP is the abbreviation of the general packet radio service tunneling protocol layer, and UDP is the abbreviation of the user datagram protocol layer.

[0125] 505. The first network side device sends the wireless resource configuration to the terminal side device.

[0126] 506. The terminal side device completes the configuration of the link with the wireless backhaul device according to the wireless resource configuration.

[0127] By applying the technical solution provided in the fourth embodiment of the present application, the second network side device (especially the non-independent network side device) can use the wireless backhaul device to which it is connected as an auxiliary access device of the terminal side device, thereby realizing dual connection of the terminal side device.

[0128] The fifth embodiment of the present application provides a communication processing device 600, such as Figure 6 As shown in the schematic diagram of the unit structure of the communication processing device, the communication processing device 600 includes a receiving unit 601, a sending unit 602 and a processing unit 603.

[0129] The communication processing device 600 provided in the fifth embodiment of the present application may also be a wireless backhaul device, which is used to implement the method performed by the wireless backhaul device in any one of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment. Specifically, the receiving unit 601 is used to perform the receiving action of the wireless backhaul device, the sending unit 1102 is used to perform the sending action of the wireless backhaul device, and the processing unit is used to perform the processing action of the wireless backhaul device. For details, please refer to the contents described in the first embodiment, the second embodiment, the third embodiment and the fourth embodiment.

[0130] The communication processing device 600 provided in the fifth embodiment of the present application may also be a network-side device, used to implement the method performed by the first network-side device or the second network-side device in any one of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment. Specifically, the receiving unit 601 is used to perform the receiving action of the network-side device, the sending unit 1102 is used to perform the sending action of the network-side device, and the processing unit is used to perform the processing action of the network-side device. For details, please refer to the contents described in the first embodiment, the second embodiment, the third embodiment and the fourth embodiment.

[0131] In the specific hardware implementation, such as Figure 7 In the hardware structure diagram of the communication processing device shown in the figure, the function of the receiving unit 601 can be implemented by the receiver 701, the sending unit 602 can be implemented by the transmitter 702, and the function of the processing unit 703 can be implemented by the processor 703. The communication processing device can also include various electronic circuits, such as a bus 704, a memory 705, and a communication interface 706, etc. Among them, the memory can contain instruction codes, and when the instruction codes are called by the processor 703, they are used to implement the method executed by the first network side device, the second network side device or the wireless backhaul device in any one of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment. Among them, the instruction code contains a data structure for implementing the functions of each protocol layer (such as the RRC layer, the MAC layer and the PHY layer).

[0132] The communication interface may be a wired communication interface, a wireless communication interface or a combination thereof, wherein the wired communication interface may be, for example, an Ethernet interface. The Ethernet interface may be an optical interface, an electrical interface or a combination thereof; and the wireless communication interface may be a wireless local area network interface.

[0133] The bus may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc.

[0134] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0135] The present application is described with reference to the flowcharts and / or block diagrams of the methods, apparatus (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0136] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0137] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

Claims

1. A wireless backhaul communication processing method, characterized in that: include: The first network side device determines to use the second network side device as an auxiliary access device of the wireless backhaul device; The first network side device sends a secondary access device adding request message to the second network side device, where the secondary access device adding request message includes first information, and the first information indicates that the wireless backhaul device is accessed; The first network side device receives an auxiliary access device adding response message sent by the second network side device, where the auxiliary access device adding response message includes configuration information for configuring a wireless link between the wireless backhaul device and the second network side device.

2. The method according to claim 1, characterized in that The configuration information includes at least one of the following: a transmission time unit configuration of the wireless link and a cell identifier of the wireless backhaul device.

3. The method according to claim 1, characterized in that Also includes: During the random access process between the wireless backhaul device and the first network side device or after the random access process is completed, the first network side device receives a radio resource control RRC message sent by the wireless backhaul device, the RRC message includes second information, and the second information indicates that the wireless backhaul device is accessing.

4. The method according to claim 1, characterized in that The first network side device is an evolved base station eNB that serves as the main access device of the wireless backhaul device and adopts the long term evolution LTE standard, and the second network side device is a next generation base station gNB that adopts the new wireless NR standard.

5. The method according to any one of claims 1 to 4, characterized in that: Also includes: The first network side device receives third information sent by the second network side device, and the third information indicates an association relationship between the second network side device and a cell of the wireless backhaul device, or an association relationship between the cell of the second network side device and a cell of the wireless backhaul device, or an association relationship between the cell of the second network side device and the wireless backhaul device.

6. A wireless backhaul communication processing method, characterized in that: include: The second network side device receives a secondary access device adding request message sent from the first network side device, where the secondary access device adding request message includes first information, where the first information indicates that wireless backhaul device access is performed; The second network side device sends an auxiliary access device adding response message to the first network side device, and the auxiliary access device adding response message includes configuration information for configuring a wireless link between the wireless backhaul device and the second network side device.

7. The method according to claim 6, characterized in that The configuration information includes at least one of the following: a transmission time unit configuration of the wireless link and a cell identifier of the wireless backhaul device.

8. The method according to claim 6, characterized in that The first network side device is an evolved base station eNB that serves as the main access device of the wireless backhaul device and adopts the long term evolution LTE standard, and the second network side device is a next generation base station gNB that adopts the new wireless NR standard.

9. The method according to any one of claims 6 to 8, characterized in that: Also includes: The third information sent by the second network side device to the first network side device indicates the association relationship between the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the cell of the wireless backhaul device, or the association relationship between the cell of the second network side device and the wireless backhaul device.

10. A first network side device, characterized in that: The method comprises a memory storing a computer program and a processor, wherein the computer program is executed by the processor so that the first network side device executes the method according to any one of claims 1 to 5.

11. A second network side device, characterized in that: It comprises a memory storing a computer program and a processor, wherein the computer program is executed by the processor to enable the second network side device to perform the method as claimed in any one of claims 6 to 9.

12. A communication system, characterized in that: It comprises a first network side device and a second network side device, wherein the first network side device is used to execute the method as described in any one of claims 1 to 5; the second network side device is used to execute the method as described in any one of claims 6 to 9.

13. The communication system according to claim 12, characterized in that Also includes wireless backhaul equipment.

14. A computer-readable storage medium, characterized in that: The storage medium includes a computer program, and the computer program is executed by a processor so that the method according to any one of claims 1 to 9 is performed.

15. A computer program product, characterized in that The program product comprises computer executable codes, which are used to implement the method according to any one of claims 1 to 9 when executed by a processor.

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