Radio Remote Unit Mobility Management Method, Apparatus, System, and Storage Medium

Abstract

The present disclosure relates to a method, apparatus, system, and storage medium for mobility management between radio remote units. The method for mobility management between radio remote units includes: informing a remote aggregation unit of user terminal exclusive sounding reference signal configuration information for updating the association relationship between a radio remote unit and a user terminal; receiving sounding reference signal related information sent by the remote aggregation unit; performing channel estimation based on the received signals of the sounding reference signals of each radio remote unit; and updating an association list between the radio remote unit and the user terminal according to the channel estimation result, the time-frequency position of the sounding reference signal, and the radio remote unit port number. The present disclosure can enable radio resource management and scheduling optimization based on the RRU, save the energy consumption of the RRU, and reduce costs based on the association list between the RRU and the UE.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications and terminals, and in particular to a method, device, system, and storage medium for managing mobility between radio remote units. Background Art

[0002] In related technologies, the mainstream indoor 5G BBU (Building Base band Unit, indoor baseband processing unit, referred to as baseband unit) needs to support 4 2T2R cells (2Transmit 2Receive cell, dual-receive dual-transmit cell), or 2 4T4R (4 input 4 output) cells. Each HUB (remote aggregation unit) can currently support a maximum of 8 RRUs (Remote Radio Units).

[0003] For example, one BBU is connected to four HUBs (remote convergence units), each HUB is connected to eight RRUs, and the eight RRUs of each HUB have the same cell ID.

[0004] Traditional extended small base station solution: 8 HUBs connected to the indoor HUB broadcast downlink signals simultaneously (high energy consumption), and directly merge multiple RRU signals uplink and transmit them back to the BBU (increased noise floor).

[0005] According to the ORAN (Open Radio Access Network) standard, the fronthaul interface division method between BBU / DU and RRU can consider Option 6 (high cost), Option 7-2 and Option 8. The latter two will have the problem of increased uplink noise floor. Summary of the invention

[0006] The inventors have found through research that in order to avoid excessive increase in uplink noise floor, the number of RRUs connected to the HUB (using the same cell ID) should be small.

[0007] However, due to the limited transmission bandwidth of the indoor fronthaul interface (for example: 10G), the number of cells that can be supported simultaneously in a BBU is usually 4 (option 6 may be more but the cost is high). The future 5G indoor procurement cost of operators will be directly related to the number of cells. In order to reduce the indoor coverage cost, the number of RRUs connected to the HUB (using the same cell ID) should be as large as possible, and different RRUs may be distributed in different indoor spaces / floors, etc. For BBU, related technologies cannot associate the UE (user terminal) with the RRU that receives the UE's uplink useful signal. The downlink requires all RRUs to broadcast the same information, which consumes a lot of energy. The merging of multiple uplink RRU signals will lead to an increase in the noise floor and a more complex interference environment.

[0008] In view of at least one of the above technical problems, the present disclosure provides a method, apparatus, and system for mobility management between radio remote units (RRUs), and a storage medium, which can enable radio resource management and scheduling optimization based on the association list between the RRU and the user equipment (UE).

[0009] According to one aspect of the present disclosure, there is provided a method for mobility management between radio remote units, including:

[0010] Informing a remote aggregation unit of the configuration information of the user equipment-specific sounding reference signal for updating the association relationship between the radio remote unit and the user equipment;

[0011] Receiving the sounding reference signal-related information sent by the remote aggregation unit, where the sounding reference signal-related information is formed by the remote aggregation unit cascading the time-frequency positions of the sounding reference signals received by each radio remote unit and the radio remote unit port numbers that can be recognized;

[0012] Performing channel estimation according to the received signals of the sounding reference signals of each radio remote unit;

[0013] Updating the association list between the radio remote unit and the user equipment according to the channel estimation result, the time-frequency position of the sounding reference signal, and the radio remote unit port number.

[0014] In some embodiments of the present disclosure, the method for mobility management between radio remote units further includes:

[0015] Updating the radio resource management and high-layer signaling configuration related to the user equipment according to the association list between the radio remote unit and the user equipment.

[0016] In some embodiments of the present disclosure, the informing the remote aggregation unit of the configuration information of the user equipment-specific sounding reference signal for updating the association relationship between the radio remote unit and the user equipment includes:

[0017] Configuring, according to the association list between the radio remote unit and the user equipment and the time-frequency resource division of each radio remote unit, a sounding reference symbol for the user equipment to update the association list between the radio remote unit and the user equipment and obtain uplink channel information;

[0018] Configuring the user equipment-specific sounding reference signal configuration information for the remote aggregation unit.

[0019] In some embodiments of the present disclosure, the user equipment-specific sounding reference signal configuration information includes at least one of the time-frequency resource positions of the sounding reference signals sent by all the access user equipment in the current cell, the sounding reference signal transmission opportunity, the sounding reference signal transmission period, and the number for distinguishing user equipment configurations.

[0020] In some embodiments of the present disclosure, configuring user terminal-specific sounding reference signal configuration information for the remote convergence unit includes:

[0021] The user terminal exclusive sounding reference signal configuration information is configured for the remote convergence unit through at least one of a network management protocol, a fronthaul interface control plane protocol, and a fronthaul interface management plane protocol.

[0022] In some embodiments of the present disclosure, the radio frequency remote units are multiple radio frequency remote units within an indoor low-cost coverage cell of a 5G new air interface extended small base station.

[0023] According to another aspect of the present disclosure, there is provided an inter-RF remote unit mobility management device, comprising:

[0024] A configuration information notification module, used to notify the remote convergence unit of user terminal-specific sounding reference signal configuration information used for updating the association relationship between the radio remote unit and the user terminal;

[0025] A related information receiving module, configured to receive the sounding reference signal related information sent by the remote convergence unit, wherein the sounding reference signal related information is formed by the remote convergence unit concatenating the sounding reference signal received by each remote radio unit with an identifiable time-frequency position of the sounding reference signal and a port number of the remote radio unit;

[0026] A channel estimation module, configured to perform channel estimation based on a received signal of a sounding reference signal of each radio remote unit;

[0027] The list updating module is used to update the association list between the remote radio unit and the user terminal according to the channel estimation result, the time-frequency position of the sounding reference signal and the port number of the remote radio unit.

[0028] In some embodiments of the present disclosure, the inter-RFRU mobility management device is a base station or a network management device.

[0029] In some embodiments of the present disclosure, the inter-RFU mobility management apparatus is used to execute operations to implement the inter-RFU mobility management method as described in any of the above embodiments.

[0030] According to another aspect of the present disclosure, there is provided an inter-RF remote unit mobility management device, comprising:

[0031] A memory for storing instructions;

[0032] The processor is configured to execute the instruction so that the inter-RFU mobility management apparatus performs operations to implement the inter-RFU mobility management method as described in any one of the above embodiments.

[0033] According to another aspect of the present disclosure, there is provided a mobility management system between radio remote units (RRUs), including the mobility management device between RRUs as described in any of the above embodiments.

[0034] In some embodiments of the present disclosure, the mobility management system between RRUs further includes:

[0035] A remote aggregation unit, configured to generate detection reference signal related information after receiving multiple RRUs signals, and send the detection reference signal related information to the mobility management device between RRUs;

[0036] Wherein, the remote aggregation unit, when generating the detection reference signal related information, according to the configuration of the mobility management device between RRUs, does not merge the time-frequency resources of the detection reference signal sent by the user equipment (UE), and adopts a cascading method to append a number for distinguishing the time-frequency position of the detection reference signal and the RRU serial number or port number.

[0037] According to another aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the mobility management method between RRUs as described in any of the above embodiments is implemented.

[0038] The present disclosure can enable radio resource management and scheduling optimization based on the RRU and UE association list, save the energy consumption of RRUs, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 Schematic diagrams of some embodiments of a 5G NR extended small base station.

[0041] Figure 2 Schematic diagram of the division method of the fronthaul interface between the related technology BBU / DU and RRU.

[0042] Figure 3 Schematic diagrams of some embodiments of the mobility management method between RRUs of the present disclosure.

[0043] Figure 4 Schematic diagrams of other embodiments of the mobility management method between RRUs of the present disclosure.

[0044] Figure 5 It is a schematic diagram of Option 7-2, the division method of the fronthaul interface between the BBU / DU and the RRU in some embodiments of the present disclosure.

[0045] Figure 6 It is a schematic diagram of some embodiments of the mobility management device between radio remote units in the present disclosure.

[0046] Figure 7 It is a structural schematic diagram of some other embodiments of the mobility management device between radio remote units in the present disclosure. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some embodiments of the present disclosure, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present disclosure and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0048] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present disclosure.

[0049] Meanwhile, it should be understood that, for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship.

[0050] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the authorization specification.

[0051] In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0052] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0053] Figure 1 It is a schematic diagram of some embodiments of a 5G NR extended small cell. As Figure 1 shown, the baseband unit BBU is connected to the remote aggregation unit HUB, and each HUB can support a maximum of 8 connected RRUs.

[0054] As Figure 1 shown, the BBU can be replaced by a CU (Centralized Unit) and a DU (Distributed Unit).

[0055] For example: 1 BBU is connected to 4 HUBs, each HUB is connected to 8 RRUs, and the 8 RRUs of each HUB have the same cell id (cell identifier).

[0056] According to the discussion of the ORAN (Open Radio Access Network) standard, the division method of the fronthaul interface between the BBU / DU and the RRU can consider Option 6 (high cost), Option 7-2, and Option 8. The latter two will have the problem of uplink noise floor elevation.

[0057] Figure 2 It is a schematic diagram of the division method of the fronthaul interface between the BBU / DU and the RRU in the related technology. For the Option 6 division method (division option), the division is performed between the MAC (Media Access Control Address) and encoding / decoding. For the Option 7-2 division method, the division is performed between the RE mapping (resource mapping) and the FFT (Fast Fourier Transform) / IFFT (Inverse Fast Fourier Transform decoding). For the Option 8 division method, the division is performed between adding CP (Cyclic Prefix) / removing CP and RF (Radio Frequency).

[0058] Table 1 specifically gives the function division, uplink noise floor elevation, and cause analysis of the three division methods of Option 6, Option 7-2, and Option 8.

[0059] Table 1

[0060]

[0061]

[0062] In Table 1, IF is Intermediate frequency, PHY is Physical Layer, UL is UpLink, and DL is Down-link. High-PHY and Low-PHY are in the 5G system, where the L1PHY layer is further divided into High-PHY and Low-PHY. High-PHY refers to the software entity in L1 that has no direct strong correlation with the DSP (Digital Signal Processor), and Low-PHY refers to those software entities that have a strong correlation with the DSP. RLC is RadioLink Control. PDCP is Packet Data Convergence Protocol. Core Network is the core network; Optical Multiplexer is the optical multiplexer, and FHGW is the fronthaul Gateway.

[0063] To avoid excessive uplink noise floor elevation, the number of RRUs connected to the HUB (using the same cell id) should be small.

[0064] However, due to the limited transmission bandwidth of the indoor distribution fronthaul interface (for example: 10G), the number of cells that can be supported simultaneously in a BBU is usually 4 (option 6 may support more, but it is costly). The future 5G indoor distribution procurement cost for operators will be directly related to the number of cells. To reduce the indoor coverage cost, the number of RRUs connected to the HUB (using the same cell id) should be as large as possible, and different RRUs may be distributed in different indoor spaces / floors, etc. For the BBU, currently, it is impossible to associate the UE with the RRU that receives the useful uplink signal of the UE. For the downlink, all RRUs need to broadcast the same information, which consumes a large amount of energy. The combination of signals from multiple RRUs in the uplink will bring noise floor elevation and a more complex interference environment.

[0065] In view of at least one of the above technical problems, for the newly built 5G indoor coverage in non-hotspot areas or blind spot filling scenarios, the present disclosure provides a method, device, system, and storage medium for mobility management between radio remote units, that is, provides a low-cost indoor coverage solution for 5G NR extended small base stations.

[0066] The present disclosure will be described below through specific embodiments.

[0067] Figure 3 It is a schematic diagram of some embodiments of the method for mobility management between radio remote units of the present disclosure. Preferably, this embodiment can be executed by the device for mobility management between radio remote units of the present disclosure or the system for mobility management between radio remote units of the present disclosure. The method may include at least one of the following steps, where:

[0068] Step 31: Notify the remote convergence unit of user terminal-specific sounding reference signal configuration information for updating the association relationship between the radio remote unit and the user terminal.

[0069] In some embodiments of the present disclosure, the radio frequency remote unit may be a plurality of radio frequency remote units within an indoor low-cost coverage cell of a 5G new air interface extended small base station.

[0070] In some embodiments of the present disclosure, the inter-RFRU mobility management device may be a base station or an OAM (Operation Administration and Maintenance, ie, a network management device).

[0071] In some embodiments of the present disclosure, the inter-radio remote unit mobility management device may be a BBU.

[0072] In some embodiments of the present disclosure, step 31 may include step 311 and step 312, wherein:

[0073] Step 311: According to the association list between the remote radio unit and the user terminal and the time-frequency resource division of each remote radio unit, the user terminal is configured to update the association list between the remote radio unit and the user terminal, and obtain a sounding reference symbol for uplink channel information.

[0074] Step 312: configure user terminal-specific sounding reference signal configuration information for the remote convergence unit.

[0075] In some embodiments of the present disclosure, the user terminal-specific sounding reference signal configuration information may include at least one of the time-frequency resource locations for sending sounding reference signals by all access user terminals in the current cell, the timing for sending sounding reference signals, the period for sending sounding reference signals, and a number used to distinguish user terminal configurations.

[0076] In some embodiments of the present disclosure, step 312 may include: configuring user terminal-specific sounding reference signal configuration information for the remote convergence unit through at least one of a network management protocol, a fronthaul interface control plane protocol, and a fronthaul interface management plane protocol.

[0077] Step 32: Receive the sounding reference signal related information sent by the remote convergence unit, wherein the sounding reference signal related information is formed by the remote convergence unit concatenating the sounding reference signal received by each remote radio unit with an identifiable time-frequency position of the sounding reference signal and a port number of the remote radio unit.

[0078] Step 33: performing channel estimation according to the sounding reference signal received by each radio remote unit.

[0079] Step 34: Update the association list between the remote radio unit (RRU) and the user equipment (UE) according to the channel estimation result, the time-frequency position of the sounding reference signal, and the RRU port number.

[0080] In some embodiments of the present disclosure, after step 34, the RRU inter-mobility management method may further include: updating the radio resource management and high-layer signaling configuration related to the UE according to the association list between the RRU and the UE.

[0081] Based on the RRU inter-mobility management method provided in the above embodiments of the present disclosure, it is necessary to improve the 5G fronthaul solution with more test verifications in the industry for Option 7-2, and design a method for indoor low-cost coverage radio resource management applicable to 5G NR extended small cells. Based on the association list between the RRU and the UE, enable the radio resource management and scheduling optimization based on the RRU, thereby saving the RRU energy consumption, reducing the cost, supporting a larger number of RRUs connected to the HUB belonging to the same cell ID, and at the same time reducing the excessive uplink noise floor and interference rise.

[0082] The above embodiments of the present disclosure belong to the fields of wireless communication and terminals. The present disclosure is applicable to an indoor low-cost coverage solution for 5G NR extended small cells, and is used for newly building indoor coverage in non-hotspot areas or blind spot filling scenarios.

[0083] Figure 4 It is a schematic diagram of some other embodiments of the RRU inter-mobility management method of the present disclosure. Preferably, this embodiment can be executed by the RRU inter-mobility management system of the present disclosure. The method may include at least one of the following steps, where:

[0084] Step 41: The base station / OAM semi-statically configures the sounding reference signal (SRS) for the UE to obtain the uplink channel information for RRU-UE update according to the RRU-UE association list and the time-frequency resource division of each RRU.

[0085] In some embodiments of the present disclosure, the base station / OAM may obtain the RRU-UE association list according to the initial random access configuration of the RRU for SSB punching or SRS measurement and other implementation schemes.

[0086] In some embodiments of the present disclosure, step 41 may include: for the convenience of subsequent implementation processing, configure the SRS of all access users in the cell within the time-frequency resources shared by multiple RRUs.

[0087] Step 42: The base station / OAM configures the HUB with the time-frequency resource location, SRS sending timing / period, and number used to distinguish UE configurations for all UEs accessing the current cell to send SRS through the network management protocol or the fronthaul interface control plane / management plane protocol.

[0088] Step 43: After receiving multiple RRU signals, the HUB does not combine the time-frequency resources of the SRS signal sent by the UE according to the base station / network management configuration, but adopts a cascade method, attaches the number used to distinguish the time-frequency position of the SRS signal and the RRU sequence number / port number, and sends it to the base station / OAM through the network management protocol or the fronthaul interface user plane / control plane protocol.

[0089] Figure 5 FIG. 2 is a schematic diagram of Option 7-2 of the fronthaul interface division method between the BBU / DU and the RRU in some embodiments of the present disclosure. Figure 5 As shown, in the Option 7-2 partitioning method, the RRU performs the RF, CP removal and FFT functions, and the BBU / DU performs the REmapping, channel estimation, equalization and diversity combining, dissection, descrambling, rate matching, decoding and MAC functions.

[0090] In some embodiments of the present disclosure, Figure 5 As shown, the correspondence between the time-frequency position number of the SRS signal attached to the HUB and the RRU number / port number is Index-0: SRS time-frequency position number 0, RRU number RRU0; Index-1: SRS time-frequency position number 0, RRU number RRU1; ...; Index-n: SRS time-frequency position number 0, RRU number RRUn.

[0091] Step 44: The base station / OAM performs channel estimation for the SRS reception signal of each RRU, and updates the RRU-UE association list according to the time-frequency position information and number of the SRS signal sent by the base station / OAM to the UE and the channel estimation result.

[0092] For example, the RSRP of the SRS signal with SRS number 0 received by RRU2 is higher than the RSRP of the SRS signal with SRS number 0 received by RRU1. The base station / OAM searches the SRS signal configuration and finds that the signal with SRS number 0 is sent by UE0. Therefore, the association between UE0 and RRU1 is changed to that between UE0 and RRU2.

[0093] For example, the SRS signals of SRS number 0 received by RRU1 and RRU2 are both higher than the preset threshold Thr_RSRP, the base station / OAM searches for the SRS signal configuration, and the SRS number 0 signal is sent by UE0, so UE0 is associated with RRU1 and RRU2 at the same time.

[0094] Step 45: The base station / OAM updates the relevant radio resource management and high-layer signaling configurations of the UE according to the RRU-UE association list.

[0095] The related technologies do not have technical solutions to solve the method of intra-cell RRU-to-RRU handover based on different RRUs when different RRUs belong to the same cell ID under 5G NR indoor distributed coverage.

[0096] The above embodiments of the present disclosure propose a method for intra-cell RRU mobility management with low-cost indoor coverage applicable to 5G NR extended small base stations.

[0097] The solution of the above embodiments of the present disclosure is based on the 7-2 division method of the fronthaul of the extended indoor distributed small base station. The UE-specific SRS configuration for updating the RRU-UE association relationship is informed to the remote aggregation unit HUB by the base station / OAM through the network management protocol and / or the fronthaul interface control plane / management plane protocol. The HUB cascades and attaches the SRS signals received by each RRU with the time-frequency position and RRU port number that can identify the SRS, and sends them to the BBU / OAM through the network management protocol or the fronthaul interface user plane / control plane. The base station / OAM updates the RRU-UE association relationship according to the SRS measurement results, UE-specific SRS configuration information, and RRU port numbers. This method does not modify the existing 3GPP protocol, is simple to implement, and can achieve RRU-to-RRU handover within the same cell through periodic configuration. And it can enable multi-RRU wireless resource allocation optimization through the multi-RRU and UE association relationship, improving the user transmission rate.

[0098] The solution of the above embodiments of the present disclosure can enable radio resource management and scheduling optimization based on RRU. The above embodiments of the present disclosure can significantly reduce the background noise and interference rise, improve the uplink coverage, reduce the downlink RRU power consumption, expand the number of RRUs supported by a single BBU, significantly reduce the cost of indoor small base stations, and are suitable for newly built indoor non-hotspot scenarios and blind spot filling areas.

[0099] Figure 6 It is a schematic diagram of some embodiments of the mobility management device between radio frequency remote units of the present disclosure. As Figure 6 shown, the mobility management device between radio frequency remote units of the present disclosure may include a configuration information notification module 61, a related information receiving module 62, a channel estimation module 63, and a list update module 64, where:

[0100] The configuration information notification module 61 is used to inform the remote aggregation unit of the user terminal-specific sounding reference signal configuration information for updating the radio frequency remote unit-user terminal association relationship.

[0101] In some embodiments of the present disclosure, the radio frequency remote unit may be multiple radio frequency remote units in the indoor low-cost coverage cell of a 5G new radio extended small base station.

[0102] In some embodiments of the present disclosure, the user terminal-specific sounding reference signal configuration information may include at least one of the time-frequency resource locations for sending sounding reference signals by all access user terminals in the current cell, the timing for sending sounding reference signals, the period for sending sounding reference signals, and a number used to distinguish user terminal configurations.

[0103] In some embodiments of the present disclosure, the configuration information notification module 61 can be used to configure the user terminal for updating the association list between the radio remote unit and the user terminal and the time-frequency resource division of each radio remote unit, and obtain the detection reference symbol of the uplink channel information; and configure the user terminal-specific detection reference signal configuration information for the remote convergence unit.

[0104] In some embodiments of the present disclosure, the configuration information notification module 61 can be used to configure the user terminal exclusive detection reference signal configuration information for the remote aggregation unit through at least one of the network management protocol, the fronthaul interface control plane protocol and the fronthaul interface management plane protocol.

[0105] The related information receiving module 62 is used to receive the sounding reference signal related information sent by the remote convergence unit, wherein the sounding reference signal related information is formed by the remote convergence unit concatenating the sounding reference signal received by each radio remote unit with an identifiable time-frequency position of the sounding reference signal and the radio remote unit port number.

[0106] The channel estimation module 63 is configured to perform channel estimation according to the sounding reference signal received by each radio remote unit.

[0107] The list updating module 64 is used to update the association list between the remote radio unit and the user terminal according to the channel estimation result, the time-frequency position of the sounding reference signal and the port number of the remote radio unit.

[0108] In some embodiments of the present disclosure, the inter-RFRU mobility management device may be a base station or a network management device.

[0109] In some embodiments of the present disclosure, the inter-radio remote unit mobility management device may be a BBU.

[0110] In some embodiments of the present disclosure, the inter-RRU mobility management apparatus may also be used to update the radio resource management and high-layer signaling configuration related to the user terminal according to the association list between the RRU and the user terminal.

[0111] In some embodiments of the present disclosure, the inter-RF remote unit mobility management device is used to implement any of the above embodiments (for exampleFigures 3 - 5 The operations of the radio frequency remote unit (RRU) - to - RRU mobility management method according to any of the embodiments.

[0112] Based on the RRU - to - RRU mobility management device provided in the above - mentioned embodiments of the present disclosure, it is necessary to improve the 5G fronthaul solution with more industry tests and validations for Option 7 - 2 currently, and design a method for indoor low - cost coverage radio resource management applicable to 5G NR extended small cells. Based on the association list of RRU and UE, enable RRU - based radio resource management and scheduling optimization, thereby saving RRU energy consumption, reducing costs, supporting a larger number of RRUs connected to the HUB belonging to the same cell ID, and at the same time reducing excessive uplink noise floor and interference rise.

[0113] Figure 7 It is a schematic structural diagram of some other embodiments of the RRU - to - RRU mobility management device of the present disclosure. As Figure 7 shown, the RRU - to - RRU mobility management device includes a memory 71 and a processor 72.

[0114] The memory 71 is used to store instructions. The processor 72 is coupled to the memory 71, and the processor 72 is configured to execute the methods related to the RRU - to - RRU mobility management method described in the above - mentioned embodiments (for example Figures 3 - 5 any of the embodiments).

[0115] As Figure 7 shown, the RRU - to - RRU mobility management device further includes a communication interface 73 for information interaction with other devices. At the same time, the RRU - to - RRU mobility management device further includes a bus 74, and the processor 72, the communication interface 73, and the memory 71 complete mutual communication through the bus 74.

[0116] The memory 71 may include a high - speed RAM memory, and may also include non - volatile memory, such as at least one disk memory. The memory 71 may also be a memory array. The memory 71 may also be partitioned, and the blocks may be combined into virtual volumes according to certain rules.

[0117] In addition, the processor 72 may be a central processing unit (CPU), or may be an application - specific integrated circuit (ASIC), or may be one or more integrated circuits configured to implement the embodiments of the present disclosure.

[0118] The solutions of the above embodiments of the present disclosure can enable radio resource management and scheduling optimization based on RRU. The above embodiments of the present disclosure can significantly reduce the background noise and interference rise, improve the uplink coverage, reduce the downlink RRU power consumption, expand the number of RRUs supported by a single BBU, significantly reduce the cost of indoor small base stations, and are suitable for new indoor non-hotspot scenarios and blind area filling.

[0119] According to another aspect of the present disclosure, there is provided a mobility management system between radio remote units, including a mobility management device between radio remote units as described in any of the above embodiments (for example Figure 6 or Figure 7 the embodiment).

[0120] In some embodiments of the present disclosure, the mobility management system between radio remote units may further include:

[0121] A remote aggregation unit, configured to generate sounding reference signal related information after receiving signals from multiple radio remote units, and send the sounding reference signal related information to the mobility management device between radio remote units.

[0122] In some embodiments of the present disclosure, the remote aggregation unit, when generating sounding reference signal related information, does not merge the time-frequency resources of the sounding reference signals sent by the user terminal according to the configuration of the mobility management device between radio remote units, and adopts a cascading method to append a number for distinguishing the time-frequency position of the sounding reference signal and the radio remote unit serial number or port number.

[0123] The solutions of the above embodiments of the present disclosure are based on the extended indoor distributed small cell fronthaul 7-2 division method. Through the base station / OAM, the UE-specific SRS configuration for updating the RRU-UE association relationship is informed to the remote aggregation unit HUB through the network management protocol and / or the fronthaul interface control plane / management plane protocol. The HUB cascades and appends the numbers that can identify the SRS time-frequency position and the RRU port to the SRS signals received by each RRU, and sends them to the BBU / OAM through the network management protocol or the fronthaul interface user plane / control plane. The base station / OAM updates the RRU-UE association relationship according to the SRS measurement results, UE-specific SRS configuration information, RRU port number and other information. This method does not modify the existing 3GPP protocol, is simple to implement, and can achieve handover between RRUs in the same cell through periodic configuration. And it can enable multi-RRU radio resource allocation optimization through the multi-RRU-UE association relationship, improving the user transmission rate.

[0124] According to another aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, they implement the functions as described in any of the above embodiments (for example Figures 3 - 5The mobility management method between radio remote units described in any of the embodiments.

[0125] Based on the non-transitory computer-readable storage medium provided by the above embodiments of the present disclosure, it is necessary to improve the 5G fronthaul solution with more industry test verifications for Option 7-2, and design a method for indoor low-cost coverage radio resource management applicable to 5G NR extended small base stations. Based on the association list of RRU and UE, enable radio resource management and scheduling optimization based on RRU, thereby saving RRU energy consumption, reducing costs, supporting a larger number of RRUs connected to the HUB belonging to the same cell ID, and at the same time reducing excessive uplink noise floor and interference rise.

[0126] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, apparatus, or computer program product. Therefore, the present disclosure can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable non-transitory storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0127] The present disclosure is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows 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 the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0128] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing devices to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0129] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide for implementing the process Figure 1 in one process or multiple processes and / or blocks Figure 1 steps for the functions specified in one block or multiple blocks.

[0130] The functional units described above can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof for performing the functions described in this application.

[0131] So far, the present disclosure has been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0132] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware or by a program instructing relevant hardware. The program can be stored in a non-transitory computer-readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk, an optical disk, etc.

[0133] The description of the present disclosure is given for purposes of illustration and description, and is not intended to be exhaustive or to limit the present disclosure to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles and practical applications of the present disclosure, and to enable those of ordinary skill in the art to understand the present disclosure and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A method for mobility management between radio frequency remote units, characterized in that include: The inter-RF remote unit mobility management device notifies the remote convergence unit of user terminal-specific sounding reference signal configuration information for updating the association relationship between the RF remote unit and the user terminal, wherein the notifying the remote convergence unit of the user terminal-specific sounding reference signal configuration information for updating the association relationship between the RF remote unit and the user terminal comprises: configuring the user terminal-specific sounding reference signal configuration information for the remote convergence unit, wherein the user terminal-specific sounding reference signal configuration information includes a number for distinguishing the user terminal configuration; The inter-RFU mobility management device receives the sounding reference signal related information sent by the remote convergence unit, wherein the sounding reference signal related information is formed by the remote convergence unit concatenating the sounding reference signal received by each remote RF unit with an identifiable time-frequency position of the sounding reference signal and a remote RF unit port number, and the sounding reference signal related information is generated by the remote convergence unit according to the configuration of the inter-RFU mobility management device, without merging the time-frequency resources of the sounding reference signal sent by the user terminal, and by using a cascade method, and adding a number for distinguishing the time-frequency position of the sounding reference signal and a remote RF unit sequence number or a port number; The inter-RRU mobility management device performs channel estimation based on the sounding reference signal reception signal of each RRU; The inter-RFU mobility management device updates the association list between the RFU and the user terminal according to the channel estimation result, the time-frequency position of the sounding reference signal and the port number of the RFU, wherein the inter-RFU mobility management device is a base station or a network management device, and the channel estimation result is the reference signal received power of the sounding reference signal received signal of each RFU.

2. The method for mobility management between radio frequency remote units according to claim 1, wherein Also includes: The inter-RRU mobility management device updates the radio resource management and high-layer signaling configuration related to the user terminal according to the association list between the RRU and the user terminal.

3. The mobility management method between radio frequency remote units according to claim 1 or 2, characterized in that The step of notifying the remote convergence unit of the user terminal-specific sounding reference signal configuration information for updating the association relationship between the radio remote unit and the user terminal further comprises: According to the association list between the remote radio unit and the user terminal and the time-frequency resource division of each remote radio unit, the user terminal is configured with a sounding reference symbol for updating the association list between the remote radio unit and the user terminal to obtain uplink channel information.

4. The method for managing mobility between remote radio units according to claim 3, characterized in that: The user terminal-specific sounding reference signal configuration information also includes at least one of the time-frequency resource position, the sounding reference signal sending timing, and the sounding reference signal sending period for all access user terminals in the current cell to send the sounding reference signal.

5. The mobility management method between radio frequency remote units according to claim 3, wherein The configuring of user terminal-specific sounding reference signal configuration information for the remote convergence unit includes: The user terminal exclusive sounding reference signal configuration information is configured for the remote convergence unit through at least one of a network management protocol, a fronthaul interface control plane protocol, and a fronthaul interface management plane protocol.

6. The method for managing mobility between remote radio units according to claim 1 or 2, characterized in that: The radio frequency remote unit is a plurality of radio frequency remote units within the indoor low-cost coverage cell of a 5G new air interface extended small base station.

7. A mobility management device between radio frequency remote units, characterized in that, It includes: A configuration information notification module, configured to notify the remote aggregation unit of the user terminal-specific sounding reference signal configuration information for updating the association relationship between the radio frequency remote unit and the user terminal. Wherein, notifying the remote aggregation unit of the user terminal-specific sounding reference signal configuration information for updating the association relationship between the radio frequency remote unit and the user terminal includes: configuring the user terminal-specific sounding reference signal configuration information for the remote aggregation unit, and the user terminal-specific sounding reference signal configuration information includes a number used to distinguish the user terminal configuration; A related information receiving module, configured to receive the sounding reference signal related information sent by the remote aggregation unit. Wherein, the sounding reference signal related information is formed by the remote aggregation unit concatenating the time-frequency position of the sounding reference signal and the radio frequency remote unit port number that can be recognized from the sounding reference signals received by each radio frequency remote unit. The sounding reference signal related information is generated by the remote aggregation unit not merging the time-frequency resources of the sounding reference signals sent by the user terminal according to the configuration of the mobility management device between radio frequency remote units, and adopting a concatenation method, and attaching a number for distinguishing the time-frequency position of the sounding reference signal and the radio frequency remote unit serial number or port number; A channel estimation module, configured to perform channel estimation based on the received signals of the sounding reference signals of each radio frequency remote unit; A list update module, configured to update the association list between the radio frequency remote unit and the user terminal according to the channel estimation result, the time-frequency position of the sounding reference signal, and the radio frequency remote unit port number. Wherein, the channel estimation result is the reference signal received power of the received signals of the sounding reference signals of each radio frequency remote unit; Wherein, the mobility management device between radio frequency remote units is a base station or a network management device.

8. The mobility management device between radio frequency remote units according to claim 7, characterized in that The mobility management device between radio frequency remote units is used to implement the mobility management method between radio frequency remote units as described in any one of claims 2-6.

9. A mobility management device between radio frequency remote units, characterized in that It includes: A memory, configured to store instructions; A processor, configured to execute the instructions, so that the mobility management device between radio frequency remote units performs operations to implement the mobility management method between radio frequency remote units as described in any one of claims 1-6.

10. A mobility management system between radio frequency remote units, characterized in that, It includes the mobility management device between radio frequency remote units as described in any one of claims 7-9.

11. The radio frequency remote unit mobility management system according to claim 10, wherein It further includes: A remote aggregation unit, configured to generate sounding reference signal related information after receiving multiple radio frequency remote unit signals, and send the sounding reference signal related information to the mobility management device between radio frequency remote units; Wherein, the remote aggregation unit, when generating the sounding reference signal related information, does not merge the time-frequency resources of the sounding reference signals sent by the user terminal according to the configuration of the mobility management device between radio frequency remote units, and adopts a concatenation method, and attaches a number for distinguishing the time-frequency position of the sounding reference signal and the radio frequency remote unit serial number or port number.

12. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions, which, when executed by a processor, implement the radio frequency remote unit mobility management method according to any one of claims 1-6.

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