A 5G communication base station uplink noise and interference suppression system and method

Abstract

The present invention relates to the technical field related to communication background noise and interference suppression, specifically to a 5G communication base station uplink background noise and interference suppression system and method, including a terminal integration module, an external RRU, a HUB module and an external BBU, the terminal integration module is connected to the external RRU, the external RRU is connected to the HUB module using a repeater, and the HUB module is connected to the external BBU; the present invention has the characteristics of reducing network delay to a minimum, avoiding problems such as queuing for data round-trip routing, not causing service congestion, and providing better access services for terminals. At the same time, it can effectively distinguish whether the RRU signal received by the optical port is background noise or interference or service data, and then perform background noise and interference suppression, thereby further reducing the background noise of the uplink signal of the entire system.

Description

Technical Field

[0001] The present invention relates to the technical field related to communication background noise and interference suppression, and specifically to a 5G communication base station uplink background noise and interference suppression system and method. Background Art

[0002] In 5G communication, for scenarios with strict low latency and high reliability, it is required that the network-side latency is almost negligible, and it is mainly targeted at machine-type terminals deployed regionally. In the design of traditional cellular networks, the function and physical devices have a strong binding relationship, and using a centralized control and data path will inevitably cause a latency bottleneck.

[0003] In the existing terminal management process of cellular networks, as the number of machine-type terminals increases, it will increase the burden on the core network and easily cause the problem of signaling storms.

[0004] And when accessing the 5G communication network, the area where the electromagnetic wave signal cannot reach is called a "dead zone". In such a dead zone, the terminal can access the network by using the relay function of the repeater and receive the services of the network.

[0005] However, if there are not enough resources in the existing service station, that is, when the service load is too heavy, the service station will block the relay access call initiated by this terminal, and in this case, this terminal cannot enjoy the services provided by the network.

[0006] The typical networking methods of existing 5G distributed base stations are a combination of star and chain. During uplink communication, the expansion unit HUB superimposes the uplink signals from N RRU, and then transmits them to the BBU through 1 optical port. However, after the HUB superimposes the signals, the background noise will also be superimposed, which will inevitably cause the uplift of the background noise of the entire system. In a communication system, background noise is an important factor for the deterioration of communication performance. At a minimum, it affects the call quality and reduces the uplink and downlink data transmission rates. At worst, the service data will be completely submerged, and the wireless signals in the affected area will be completely interrupted, which will affect the entire communication system. Summary of the Invention

[0007] The purpose of the present invention is to address the deficiencies in the prior art, and it has the characteristics of minimizing network latency, avoiding problems such as data round-trip routing queuing and waiting, not causing service blockage, and providing better access services for terminals. At the same time, it can effectively distinguish whether the RRU signal received by the optical port is background noise, interference, or service data, and then perform background noise and interference suppression, thereby further reducing the background noise of the uplink signal of the entire system.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A 5G communication base station uplink noise floor and interference suppression system and method, including a terminal integration module, an external RRU, a HUB module, and an external BBU. The terminal integration module is connected to the external RRU. The external RRU is connected to the HUB module using a repeater. The HUB module is connected to the external BBU;

[0010] The terminal integration module includes multiple EP terminal entrances, a DCS functional entity, and a core network. The multiple EP terminal entrances are connected to the DCS functional entity. The DCS functional entity is connected to the core network. The core network is connected to the external RRU;

[0011] The HUB module internally integrates a power detection and judgment module, a CP related operation and result judgment module, a signal superposition module, and a digital filter. The power detection and judgment module is connected to the external RRU through optical fiber communication. The power detection and judgment module is communicatively connected to the CP related operation and result judgment module. The CP related operation and result judgment module is communicatively connected to the signal superposition module. The signal superposition module is communicatively connected to the digital filter. The digital filter is connected to the external BBU.

[0012] Further, the power detection and judgment module is set with a power threshold value, and the power threshold value is set according to the receiving sensitivity of the base station.

[0013] Further, the CP related operation and result judgment module is set with a peak threshold value, and the peak threshold value is determined according to the relevant superposition times and link gain.

[0014] Further, the steps of the terminal integration method are as follows:

[0015] Step 1, the DSC functional entity sends broadcast information;

[0016] Step 2, the terminal performs a network selection process according to the broadcast message, based on its own device type and the network type to be accessed, and initiates a network access process;

[0017] Step 3, the DSC functional entity verifies the legality of the terminal identity according to the terminal identity authentication information and the fixed identification information of the terminal received from the terminal;

[0018] Step 4, after the terminal identity passes the legality verification, the DSC functional entity sends an attachment response message to the terminal;

[0019] Step 5, the terminal verifies the legality of the accessed DSC functional entity according to the DSC functional entity identity authentication information received;

[0020] Step 6, after the terminal completes the verification of the legality of the DSC functional entity, it sends an attachment completion message to the DSC functional entity;

[0021] Step 7, after the DSC receives the attachment completion message, it indexes the context established locally for the terminal based on the temporary terminal identifier and updates the terminal status to successfully attached.

[0022] Step 8, the DSC updates the information on the number of currently accessed terminals and sends the information on the number of accessed terminals to the core network through the cluster information update process.

[0023] Furthermore, the method steps for terminal integration are as follows:

[0024] Step 1, the DSC sends broadcast information in a broadcast manner.

[0025] Step 2, initiate a network access process based on the network identifier, DSC identifier, and DSC supported service list information carried in the broadcast message.

[0026] Step 3, the DSC sends an authentication request to the core network.

[0027] Step 4, the core network authenticates the terminal based on the terminal fixed identifier received from the DSC, the terminal authentication information, and the previously saved terminal subscription information.

[0028] Step 23, after the core network completes the authentication of the terminal, it sends an authentication completion message to the DSC.

[0029] Step 6, the DSC assigns a temporary terminal identifier to the terminal, establishes a context for the terminal, and saves the terminal fixed identifier information, the temporary terminal identifier information, the security context information of the terminal, and the terminal subscription service list.

[0030] Step 7, based on the received core network authentication information and combined with the security context previously saved by the terminal, the terminal verifies the network legality and saves the temporary terminal identifier.

[0031] Step 8, after completing the verification of the network legality, the terminal sends an attachment completion message to the DSC.

[0032] Step 9, the DSC updates the terminal status information saved locally.

[0033] Step 10, the DSC sends the terminal status information to the core network, and the core network saves the terminal online status information.

[0034] Furthermore, the method steps for connecting the external RRU to the HUB module using a repeater are as follows:

[0035] Step 1, the repeater receives the access request from the terminal.

[0036] Step 2, the repeater performs access authentication on the access request. If the authentication is passed, the resource requirement information carried in the access request is forwarded to the service station;

[0037] Step 3, the service station establishes a service relationship with the terminal and returns the corresponding service resources to the terminal through the repeater according to the received resource requirement information.

[0038] Furthermore, the method steps for uplink noise floor and interference suppression are as follows:

[0039] Step 1, the HUB module receives the uplink signals of the external RRU sent by the repeaters of each port and performs power detection through the power detection and judgment module;

[0040] Step 2, compare the detection result of Step 1 with the preset power threshold value. If it is lower than the power threshold value, set this port to zero. If it is higher than the power threshold value, perform relevant operations on the CP of this signal;

[0041] Step 3, compare the relevant operation result of the CP in Step 2 with the preset peak threshold value. If this value is greater than the peak threshold value, set this signal to zero. If this value is less than the peak threshold value, retain this service data;

[0042] Step 4, perform data superposition on the service data retained in Step 3 through the signal superposition module inside the HUB module;

[0043] Step 5, perform filtering processing on the service data superposed in Step 4 through the digital filter;

[0044] Step 6, send the uplink signal superposed and filtered in Step 5 to the external BBU module to complete the demodulation and decoding of the uplink signal through the external BBU module.

[0045] Furthermore, the CP is the same as the OFDM tail coding. The relevant operation of the CP is to perform correlation operation on the CP and the OFDM tail. If it is service data, the relevant operation result will generate a peak.

[0046] The beneficial effects of the present invention are:

[0047] As can be seen from the above technical solutions, the beneficial effects of the present invention:

[0048] In 5G communication, the terminal integration module features centralized management combined with distributed organization and transmission. Meanwhile, the repeater has an identity identifier with an encryption policy. For access requests that do not meet the conditions, access can be denied. In this way, when there are insufficient resources in the service station, the service station provides services to terminals with security priority, which will not cause service blockage and can provide better access services for terminals. Through the HUB, it can distinguish whether the RRU signal received by its optical port is background noise / interference or service data. If the RRU uploads background noise / interference, the HUB sets it to 0 and does not pass it to the BBU, thereby reducing the background noise of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0050] Figure 1 It is a schematic diagram of the overall system structure of the present invention;

[0051] Figure 2 It is a schematic diagram of the first method for terminal integration of the present invention;

[0052] Figure 3 It is a schematic diagram of the second method for terminal integration of the present invention;

[0053] Figure 4 It is a schematic diagram of the method for the repeater to access the network of the present invention;

[0054] Figure 5 It is a schematic diagram of a method for suppressing uplink background noise and interference in a 5G communication base station of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] Referring to Figures 1 to 5 as shown, the present embodiment provides a system and method for suppressing uplink background noise and interference in a 5G communication base station, including a terminal integration module, an external RRU, a HUB module, and an external BBU. The terminal integration module is connected to the external RRU. The external RRU is connected to the HUB module using a repeater. The HUB module is connected to the external BBU;

[0056] The terminal integration module includes multiple EP terminal entrances, a DCS functional entity, and a core network. Multiple EP terminal entrances are connected to the DCS functional entity. The DCS functional entity is connected to the core network. The core network is connected to the external RRU;

[0057] The HUB module integrates a power detection and judgment module, a CP-related operation and result judgment module, a signal superposition module, and a digital filter. The power detection and judgment module is connected to an external RRU through optical fiber communication. The power detection and judgment module is communicatively connected to the CP-related operation and result judgment module. The CP-related operation and result judgment module is communicatively connected to the signal superposition module. The signal superposition module is communicatively connected to the digital filter. The digital filter is connected to an external BBU.

[0058] In 5G communication, the terminal integration module has the characteristics of centralized management and distributed organization and transmission combination. At the same time, the repeater has an identity identifier with an encryption policy. For access requests that do not meet the conditions, access can be refused. In this way, when there are not enough resources in the service station, the service station provides services for terminals with security priority, which will not cause service congestion and can provide better access services for terminals. Through the HUB, it can be distinguished whether the RRU signal received by its optical port is background noise / interference or service data. If the RRU uploads background noise / interference, the HUB sets it to 0 and does not transmit it to the BBU, thereby reducing the background noise of the entire system.

[0059] Refer to Figures 1 to 5 As shown, the power detection and judgment module is provided with a power threshold value, and the power threshold value is set according to the receiving sensitivity of the base station. In this embodiment, the HUB module receives the uplink signals of external RRUs on each port, detects the signal power of the uplink signals, and compares the detected value with the preset power threshold value.

[0060] Refer to Figures 1 to 5 As shown, the CP-related operation and result judgment module is provided with a peak threshold value, and the peak threshold value is determined according to the relevant superposition times and link gain. In this embodiment, the signals with detected power signals greater than the power threshold value are subjected to CP-related operations, and the operation results are compared and processed with the preset peak threshold value.

[0061] Refer to Figures 1 to 5 As shown, the steps of the terminal integration method are as follows:

[0062] Step 1, the DSC functional entity sends broadcast information;

[0063] Step 2, the terminal performs a network selection process and initiates a network access process according to the broadcast message, based on its own device type and the network type to be accessed;

[0064] Step 3, the DSC functional entity verifies the legality of the terminal identity according to the terminal identity authentication information and the fixed identification information of the terminal received from the terminal;

[0065] Step 4, after the terminal identity passes the legality verification, the DSC functional entity sends an attachment response message to the terminal;

[0066] Step 5, the terminal verifies the legality of the accessed DSC functional entity according to the DSC functional entity identity verification information received;

[0067] Step 6, after the terminal completes the verification of the DSC functional entity legality, it sends an attachment completion message to the DSC functional entity;

[0068] Step 7, after receiving the attachment completion message, the DSC indexes the context established locally by the terminal according to the terminal temporary identifier and updates the terminal status to successfully attached;

[0069] Step 8, the DSC updates the information on the number of currently accessed terminals and sends the information on the number of accessed terminals to the core network through the cluster information update process. In this embodiment, this method is applicable to a type of terminal that is invisible to the core network. The core network performs group management on the group dynamically formed by the terminals in the cluster, and the core network manages the terminals through the local control center DSC; the DSC functional entity determines to obtain the authorization of the core network and manages the EPs in the cluster; the specific terminal management process may include the terminal attachment / detachment process, the terminal status update process, the terminal service activation / deactivation process, etc.

[0070] Refer to Figures 1 to 5 As shown in

[0071] Step 1, the DSC sends broadcast information by broadcasting;

[0072] Step 2, initiate a network access process according to the network identifier, DSC identifier, and DSC supported service list information carried in the broadcast message;

[0073] Step 3, the DSC sends an authentication request to the core network;

[0074] Step 4, the core network authenticates the terminal according to the terminal fixed identifier received from the DSC, the terminal identity authentication information, and the originally saved terminal subscription information;

[0075] Step 5, after the core network completes the authentication of the terminal, it sends an authentication completion message to the DSC;

[0076] Step 6, the DSC assigns a terminal temporary identifier to the terminal, establishes a context for the terminal, and saves the terminal fixed identifier information, the terminal temporary identifier information, the security context information of the terminal, and the terminal subscription service list;

[0077] Step 7, based on the received core network authentication information and in combination with the security context pre - saved by the terminal, the terminal verifies the network legality and saves the terminal temporary identifier.

[0078] Step 8, after completing the verification of network legality, the terminal sends an attachment completion message to the DSC.

[0079] Step 9, the DSC updates the terminal status information saved locally.

[0080] Step 10, the DSC sends the terminal status information to the core network, and the core network saves the terminal's on - network status information. In this embodiment, this method is for type - two terminals. For this type of terminal, the core network manages and controls the terminal, and the terminal forwards relevant message information through the DSC. During the network access process, the terminal sends an attachment request message to the DSC, which carries the terminal's fixed identifier information and the terminal authentication information. After the terminal identity information passes the verification, the terminal saves the on - network status information. In addition, the terminal also saves the serving DSC information. The DSC sends an attachment response message to the terminal, which carries the terminal temporary identifier information, the terminal fixed identifier information, and the core network authentication information. The terminal saves the terminal temporary identifier, and the core network (such as the subscription center) saves the terminal's on - network status information.

[0081] Refer to Figures 1 to 5 As shown in

[0082] Step 1, the repeater receives the access request from the terminal.

[0083] Step 2, the repeater performs access authentication on the access request. If the authentication is passed, it forwards the resource requirement information carried in the access request to the service station.

[0084] Step 3, the service station establishes a service relationship with the terminal and returns the corresponding service resources to the terminal through the repeater according to the received resource requirement information.

[0085] In this embodiment, the repeater uses the private key to decrypt the access request to obtain the identity identifier and resource requirement information of the access device; determines whether the identity identifier and resource requirement information of the access request match the access identifier and user resource allocation level of the main edge computing node respectively. If the match is passed, the security of the access request is verified; the service station receives the resource requirement information and, according to the relay access link channel condition of the service station, returns the relevant resources corresponding to the resource requirement to the terminal through the repeater; the service station determines whether it has sufficient resources to support the access of the terminal. If so, the service station determines whether the relay access link channel bandwidth is greater than the bandwidth required for resource transmission. If so, the service station feeds back an access response message to the repeater and allocates corresponding channel resources to the relay access link and returns them to the terminal.

[0086] Refer to Figures 1 to 5 As shown, the steps of the uplink noise floor and interference suppression method are as follows:

[0087] Step 1, the HUB module receives the uplink signals of the external RRU sent by the repeaters of each port and performs power detection through the power detection and judgment module;

[0088] Step 2, compare the detection result of Step 1 with the preset power threshold value. If it is lower than the power threshold value, set this port to zero. If it is higher than the power threshold value, perform relevant operations on the CP of this signal;

[0089] Step 3, compare the relevant operation result of the CP in Step 2 with the preset peak threshold value. If this value is greater than the peak threshold value, set this signal to zero. If this value is less than the peak threshold value, retain this service data;

[0090] Step 4, perform data superposition on the service data retained in Step 3 through the signal superposition module inside the HUB module;

[0091] Step 5, filter the service data superposed in Step 4 through the digital filter;

[0092] Step 6, send the uplink signal after superposition and filtering in Step 5 to the external BBU module to complete the demodulation and decoding of the uplink signal through the external BBU module.

[0093] In this embodiment, during uplink communication, the external RRU transmits the received uplink signal of the mobile terminal to the HUB module; the HUB module receives the uplink signals of the external RRUs on each port, detects the signal power of the uplink signals, and compares the detected value with a preset power threshold value. If the detected power signal is greater than the power threshold value, relevant operations of the CP are performed. If the detected power signal is less than or equal to the power threshold value, the signal is determined to be the background noise, and this port is set to zero; the signals with the detected power signal greater than the power threshold value are subjected to relevant operations of the CP, and the operation results are compared and processed with a preset peak threshold value. If the peak value of the received uplink signal is greater than the peak threshold value, the signal is retained. If it is less than or equal to the peak threshold value, the signal is determined to be an interference signal, and this port is set to zero; the processed uplink signals of each external RRU are superimposed within the HUB module, and after superimposition, they are filtered by the digital filter, and the superimposed and filtered uplink signals are sent to the external BBU module, and the external BBU module completes the demodulation and decoding of the uplink signals.

[0094] Refer to Figures 1 to 5 As shown, the CP is the same as the OFDM tail coding. The relevant operation of the CP is to perform a correlation operation between the CP and the OFDM tail. If it is service data, the relevant operation result will generate a peak value. In this embodiment, the relevant operation of the CP is to perform a correlation operation between the CP and the OFDM tail. If it is service data, the content of the CP and the OFDM tail is the same, and the relevant operation will generate a peak value.

[0095] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A 5G communication base station uplink noise and interference suppression system, characterized in that: It includes a terminal integration module, an external RRU, a HUB module and an external BBU, wherein the terminal integration module is connected to the external RRU, the external RRU is connected to the HUB module using a repeater, and the HUB module is connected to the external BBU; The terminal integration module includes multiple EP terminal entrances, a DCS functional entity and a core network, wherein the multiple EP terminal entrances are connected to the DCS functional entity, the DCS functional entity is connected to the core network, and the core network is connected to an external RRU; The HUB module integrates a power detection and judgment module, a CP-related operation and result judgment module, a signal superposition module and a digital filter. The power detection and judgment module is connected to an external RRU via optical fiber communication. The power detection and judgment module is connected to the CP-related operation and result judgment module in communication. The CP-related operation and result judgment module is connected to the signal superposition module in communication. The signal superposition module is connected to the digital filter in communication. The digital filter is connected to an external BBU. The system is used to execute a terminal integration method, a method for connecting the external RRU with the HUB module using a repeater, and an uplink noise floor and interference suppression method, wherein the terminal integration method includes method one or method two, and the steps of method one are as follows: Step 1: The DSC functional entity sends a broadcast message; Step 2: The terminal performs a network selection process based on the broadcast message, its own device type, and the type of network to be accessed, and initiates a network access process; Step 3: The DSC functional entity verifies the legitimacy of the terminal identity based on the terminal identity verification information and the fixed identification information of the terminal received from the terminal; Step 4: After the terminal identity passes the legitimacy verification, the DSC functional entity sends an attachment response message to the terminal; Step 5: The terminal verifies the legitimacy of the connected DSC functional entity based on the received DSC identity authentication information; Step 6: After the terminal completes the legitimacy verification of the DSC functional entity, it sends an attachment completion message to the DSC functional entity; Step 7, after receiving the attachment completion message, the DSC functional entity indexes the context established locally by the terminal according to the terminal temporary identifier, and updates the terminal status to successfully attached; Step 8: The DSC functional entity updates the number of currently connected terminals and sends the number of connected terminals to the core network through the cluster information update process; The steps of the second method are as follows: Step 1: The DSC functional entity sends a broadcast message via broadcast mode; Step 2: The DSC functional entity initiates a network access process according to the network identifier, DSC functional entity identifier, and DSC functional entity supported service list information carried in the broadcast message; Step 3: The DSC functional entity sends an identity authentication request to the core network; Step 4: The core network authenticates the terminal based on the terminal fixed identifier received from the DSC functional entity, the terminal identity authentication information, and the previously saved terminal contract information; Step 5: After the core network completes the identity authentication of the terminal, it sends an identity authentication completion message to the DSC functional entity; Step 6: The DSC functional entity allocates a temporary terminal identifier to the terminal, establishes a security context for the terminal, and saves the terminal fixed identifier, the terminal temporary identifier, the terminal security context, and the terminal subscription service list; Step 7: Based on the received core network verification information and the security context pre-saved by the terminal, the terminal verifies the legitimacy of the network and saves the temporary terminal identifier; Step 8: After completing the network legitimacy verification, the terminal sends an attachment completion message to the DSC functional entity; Step 9: The DSC functional entity updates the terminal status information stored locally; Step 10, the DSC functional entity sends the terminal status information to the core network, and the core network saves the terminal network status information; The method steps of connecting the external RRU with the HUB module using a repeater are as follows: Step 1, the repeater receives an access request from a terminal; Step 2, the repeater performs access authentication on the access request, and if the authentication is successful, forwards the resource demand information carried in the access request to the service station; Step 3, the service station establishes a service relationship with the terminal, and returns corresponding service resources to the terminal through the repeater according to the received resource demand information; The steps of the uplink noise floor and interference suppression method are as follows: Step 1, the HUB module receives the uplink signal of the external RRU sent by the repeater of each port, and performs power detection through the power detection and judgment module; Step 2, comparing the detection result of step 1 with the preset power threshold value, if it is lower than the power threshold value, the port is set to zero, if it is higher than the power threshold value, the signal is subjected to CP correlation operation; Step 3, comparing the correlation operation result of the CP in step 2 with the preset peak threshold value, if the value is greater than the peak threshold value, the signal is set to zero, if the value is less than the peak threshold value, the service data is retained, and the uplink signal includes the service data; Step 4, superimposing the service data retained in step 3 through the signal superposition module inside the HUB module; Step 5, filtering the service data after superposition in step 4 through the digital filter; Step 6: Send the uplink signal after superimposing and filtering in step 5 to the external BBU module, and complete the demodulation and decoding of the uplink signal through the external BBU module.

2. A 5G communication base station uplink noise floor and interference suppression system according to claim 1, characterized in that: The power detection and judgment module is provided with a power threshold value, and the power threshold value is set according to the receiving sensitivity of the base station.

3. A 5G communication base station uplink noise floor and interference suppression system according to claim 1, characterized in that: The CP related operation and result judgment module is provided with a peak threshold value, and the peak threshold value is determined according to the number of superposition times and the link gain.

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