A Delay- and Reliability-Sensitive Deterministic Wireless Communication System

Abstract

The present invention belongs to the field of communication technology, and specifically relates to a deterministic wireless communication system that is sensitive to delay and reliability. The wireless communication system adopts a quasi-symmetric air interface protocol stack design, including a network side and a terminal side. Both the network side and the terminal side adopt a three-layer protocol with the same architecture. The three-layer protocol corresponds to the L3 logical layer, the L2 link layer and the L1 physical layer arranged in sequence from top to bottom. The collaboration between the protocol layers constitutes a delay-sensitive guarantee mechanism to control and guarantee the system delay. The communication system disclosed in the present invention adopts the RAN only design concept, and forms a dumbbell-shaped protocol layer structure through a three-layer protocol layer design, which greatly simplifies the complexity of the network. Under the premise of following the principle of rational division of labor of the overall protocol stack, it has the characteristics of perfect business logic layer functions, ultra-thin adaptation layer, and strong support for physical layer performance dimension.

Description

Technical field:

[0001] The present invention belongs to the field of communication technology, and in particular relates to a deterministic wireless communication system that is sensitive to delay and reliability. Background technology:

[0002] The current mainstream wireless communication networking technologies, such as the 4G / 5G cellular network technology developed by the 3GPP standardization organization, the WiFi local area network technology developed by the IEEE standardization organization, and the SparkLink protocol, are limited by their existing standard system, network architecture, protocol stack design, link layer and physical layer technology, and are difficult to achieve deterministic wireless transmission requirements with a delay of less than 2ms in terms of end-to-end communication delay indicators. The problems existing in the existing technologies are as follows:

[0003] The cellular network protocol architecture developed by the 3GPP standardization organization must not only meet the needs of many communication scenarios, but also be backward compatible. This makes the fourth-generation 4G and fifth-generation 5G communication standards based on the 3GPP series of standards too redundant and complex, and it is difficult to meet the requirements of ultra-low latency communication in industrial control scenarios.

[0004] The WiFi protocol developed by IEEE is positioned in the local area network and is committed to providing communication needs for users within a limited distance. Its protocol standard is designed based on the non-deterministic listen-before-talk (LBT) mechanism, with poor mobility support functions. The certainty and security of communication quality are difficult to meet the requirements of deterministic communication in industrial control scenarios, and it has inherent defects.

[0005] The SparkLink protocol includes an application adaptation layer. In addition, its data link layer includes two sublayers: media access control and link control. This increases the number of network layers, makes its protocol stack more complex, and introduces additional processing delays.

[0006] In summary, the current mainstream wireless communication technology has failed to find a balance point in many dimensions such as low latency, high reliability, determinism, and security to meet the communication needs of industrial control scenarios. The key to solving the problem of ultra-low latency, high reliability, and high determinism communication lies in formulating a streamlined and complete protocol stack and network architecture to reduce the delay caused by processing and transmission, thereby achieving end-to-end ultra-low latency communication. In view of this, the present invention proposes a new type of latency and reliability-sensitive wireless communication system. Summary of the invention:

[0007] The present invention is to solve the problems existing in the above-mentioned prior art and provide a deterministic wireless communication system which is sensitive to delay and reliability.

[0008] A delay- and reliability-sensitive deterministic wireless communication system.

[0009] It is characterized in that: the wireless communication system adopts a quasi-symmetric air interface protocol stack design, including a network side and a terminal side. Both the network side and the terminal side adopt a three-layer protocol with the same architecture. The three-layer protocol corresponds to the L3 logical layer, L2 link layer and L1 physical layer arranged in sequence from top to bottom. The collaboration between the protocol layers constitutes a delay-sensitive protection mechanism to control and guarantee the system delay.

[0010] Furthermore, the L3 logical layer interacts with the L2 link layer through a logical channel, and the logical channel includes a service logical channel and a control logical channel, wherein the service logical channel is used to carry DRB, and the control logical channel is used to carry SRB, broadcast and paging information; the L2 link layer interacts with the L1 physical layer through a transport channel.

[0011] Furthermore, the service logic channel type is divided into real-time service logic channel and non-real-time service logic channel according to the real-time nature of the service.

[0012] Furthermore, the L3 logic layer is responsible for network access control and resource management of wireless communication systems and service data flow processing, including

[0013] A network access control NAC module, which is responsible for the signaling flow control plane function and performs overall control over terminal user access to the network, mobility, and session management;

[0014] A user data function UDF module, which is used for mapping service data with quality of service QoS, mapping quality of service QoS with data radio bearer DRB or signaling radio bearer SRB, service data flow control and transmission, and control of delay-sensitive logic;

[0015] The data packet aggregation PCP module is responsible for the unified processing of signaling and data packets of the network access control NAC module and the user data function UDF module. As the packet unified inlet and outlet aggregation function entity of the L3 logical layer, it interacts with the L2 link layer by establishing a mapping from radio bearers to logical channels.

[0016] Further, the network access control NAC module includes parallel designed functional units, the functional units including a radio resource control unit RRC, an access management unit AM, a session management unit SM and a mobility management unit MM;

[0017] The user data function UDF module includes an endogenous time sensitive control unit TSC and a service data adaptation unit SDA;

[0018] The data packet convergence PCP module includes a delay-sensitive control anchor point unit and a user plane data flow anchor point unit.

[0019] Furthermore, the network access control NAC module also includes a global logic controller for global scheduling processing of all TE state maintenance, signaling flow control, and signaling priority sorting in the signaling pool constituted by the signaling of each functional unit in the network access control NAC module.

[0020] Furthermore, the L2 link layer provides data transmission to the L3 logic layer and performs wireless resource management, and the L2 link layer includes a wireless access control module RAC.

[0021] Furthermore, the L1 physical layer provides data transmission, HARQ feedback signaling transmission, scheduling request signaling transmission, and channel measurement and result reporting services to the L2 link layer.

[0022] Furthermore, the L1 physical layer includes a multiple access unit, a physical channel providing unit, a modulation and demodulation unit, a channel coding and decoding unit, a physical layer process unit and a physical layer measurement unit.

[0023] A communication method of the wireless communication system, characterized in that: the communication method includes a control plane signaling transmission method and a user plane service data flow transmission method;

[0024] The control plane signaling transmission method is used to implement the signaling process of TE residence in a cellular cell, network access, network resource allocation and management, mobility management, and security management;

[0025] The user plane service data stream transmission method is used to realize the packetization and unpacking of the user plane service data stream and provide a communication delay deterministic guarantee based on QoS differentiation.

[0026] Furthermore, the control plane signaling transmission method is specifically as follows:

[0027] The logic layer of TE triggers the signaling process, and the link layer encapsulates the signaling message, which is sent to XNB through the air interface Uu by the physical layer channel. The physical layer receives and processes the signal, extracts the signaling message through the link layer, and submits it to the logic layer for processing. In addition, according to the scenario requirements, XNB can choose to obtain TE information from NDR through the V3 interface to assist TE access control. According to the scenario requirements, XNB can choose to update TE information to NDR through the V3 interface.

[0028] The user plane service data flow transmission method is specifically as follows:

[0029] The first service node initiates a service process to the network XNB. The logic layer of XNB schedules the service flow based on the native delay-sensitive guarantee mechanism, allocates and schedules wireless resources through the link layer, and sends it to TE through the physical layer channel via the air interface Uu. The physical layer performs signal reception and processing, and the link layer performs PDU grouping and data packet processing. It is submitted to the logic layer for service data flow processing and finally transferred to the second service node for service logic processing.

[0030] Furthermore, the native delay-sensitive guarantee mechanism distinguishes between real-time and non-real-time data bearers at each level in the three-level mapping relationship of QoS Flow-DRB-Logical Channel, formulates a delay-sensitive control strategy for the real-time indicator of each real-time data bearer, and generates corresponding rules based on the strategy to perform delay-sensitive control on the corresponding real-time data bearers.

[0031] Furthermore, the delay-sensitive control strategy includes a combination of one or more of service flow preemption, service flow gating, service flow redundancy, and terminal preemption.

[0032] Furthermore, the logical layer UDF module formulates a delay-sensitive control strategy based on the real-time indicators of the real-time data carrier, and the PCP module generates delay-sensitive control rules for the real-time data carrier based on the strategy provided by the UDF module. The PCP module chooses to execute it itself or send it to the RAC module based on the rule type.

[0033] Furthermore, the types of delay-sensitive control rules correspond to the types of delay-sensitive control policies one by one, wherein service flow preemption and terminal preemption are performed by the RAC module, and service flow gating and service flow redundancy are performed by the PCP module.

[0034] Furthermore, the L2 link layer RAC is provided with an enhanced HARQ only retransmission mechanism and a link transmission early warning mechanism;

[0035] The specific steps of the enhanced HARQ only retransmission mechanism and link transmission early warning mechanism are as follows:

[0036] a) The terminal monitors the DL downlink in real time;

[0037] b) The terminal determines whether it needs to report warning information and its predicted scheduling reference information to the network according to the DL link deterioration situation;

[0038] c) If the current channel and future channel deterioration trend reaches the terminal's preset decision threshold, the terminal will immediately issue an early warning and pre-judgment report;

[0039] d) After receiving the early warning and prediction indication information from the terminal, the network comprehensively judges the service priority of the UE, the overall available resources, the overall factors of all terminals served by the network, and the backup means of reliability assurance, and makes a comprehensive decision to determine whether to adjust the scheduling and wireless resource allocation, and the timing of the adjustment.

[0040] e) After the network determines the scheduling and radio resource allocation adjustment information, it selects the appropriate notification method: DCI / RAC CE / RRC signaling according to the resource allocation mode (dynamic, semi-static) of the current service.

[0041] f) The terminal performs DL downlink data reception and demodulation processing according to the adjusted transmission configuration.

[0042] Furthermore, the terminal performs early warning and prediction reporting in a manner including physical layer UCI, link layer RACCE, and logical layer RRC signaling. The terminal autonomously selects one or more reporting methods to report to the network based on the degree of urgency and service quality criticality information; the terminal prediction information and scheduling autonomy auxiliary information include: warning level, recommended MCS index and its effective time window, update of the maximum number of HARQ retransmissions, and update of the number of repeated transmissions and the retransmission interval.

[0043] Furthermore, the L2 link layer RAC module segments or reassembles service data units SDUs according to the link status.

[0044] Furthermore, the L1 physical layer can implement terminal-autonomous PUCCH-UCI adaptive scheduling, and the implementation steps are:

[0045] a) The terminal equipment TE receives the pre-allocated resource set sent by the base station XNB;

[0046] b) The terminal device TE determines whether to initiate autonomous scheduling based on the current link status;

[0047] c) If the terminal equipment TE enters the autonomous scheduling state, the wireless resources and the coding modulation scheme MCS are determined based on the pre-allocated resource set obtained in step a) according to the current channel conditions; and then the new UCI format proposed in the present invention is sent to the base station XNB through the new PUCCH proposed in the present invention;

[0048] d) The base station XNB performs UCI blind detection based on PUCCH resources, determines the autonomously allocated time-frequency resource location and coding modulation scheme, and performs PUSCH data demodulation;

[0049] e) If the terminal equipment TE does not perform autonomous scheduling, data transmission is performed based on the pre-allocated resources obtained in step a) according to the scheduling information indicated by the base station side.

[0050] Furthermore, the L1 physical layer realizes adaptive spreading of the network based on the channel interference status through the anti-interference module of the DSSS spread spectrum, and the steps are as follows:

[0051] a) The base station decides whether to enable the spread spectrum anti-interference function based on the channel interference status and the pre-designed adaptive threshold;

[0052] b) If the spread spectrum anti-interference function is enabled, the base station configures specific spread spectrum anti-interference related parameters such as spread spectrum factor, spread spectrum sequence, spread spectrum start and end time;

[0053] c) The base station sends the configured spread spectrum related parameters to the terminal TE through any method such as PDCCH DCI, RAC CE control unit, NAC signaling, etc.;

[0054] d) The base station and the terminal perform uplink and downlink transmission based on spread spectrum anti-interference according to the configured spread spectrum start and end time.

[0055] Furthermore, the L1 physical layer has a sampling rate adaptation function, specifically:

[0056] Perform decimation or interpolation operations on the signal to reduce or increase the sampling rate to adapt to the different sampling rates of signals with different protocol standards;

[0057] After the sampling rate adaptation function is adopted, its functional unit can be located at any position before or after the OFDM signal generation module.

[0058] Furthermore, the L2 link layer RAC module is responsible for the preemption of DRB / Logical channel and terminal scheduling preemption execution; and reorders the scheduling priorities of DRB and TE terminals and reallocates wireless resources based on the DRB preemption rules.

[0059] Beneficial effects:

[0060] The present invention adopts the RAN only design concept and forms a dumbbell-shaped protocol layer structure through a three-layer protocol layer design, which greatly simplifies the network complexity. Under the premise of following the principle of rational division of labor of the entire protocol stack, it has the characteristics of complete business logic layer functions, ultra-thin adaptation layer, and strong support for physical layer (low latency, anti-interference, high reliability) performance dimensions.

[0061] The wireless communication system L3 logic layer of the present invention includes three functional parts, namely, the control plane, the user plane, and the aggregation anchor point, to build a complete differentiated scenario precise matching capability:

[0062] The control plane adopts a fully parallel design mode for control plane functional units, that is, each functional unit adopts a non-hierarchical design, a fully parallel, flat, equal, parallel, and efficient processing mode with little interaction. At the same time, the control plane is based on the principle of centralization, and the overall control of the signaling process is centralized. For lightweight and small cellular systems, centralized decision-making is more efficient and can effectively avoid the system overhead of MESH grid interaction, provided that the computing power capacity demand is controllable.

[0063] The native delay-sensitive deterministic control technology is introduced on the user plane, combined with the underlying adaptive link tracking and scheduling mechanism, to achieve three-dimensional wireless transmission reliability and deterministic guarantee. The delay-sensitive control function can provide low-latency, low-jitter, and highly reliable communication services for business data transmission through business scheduling and resource allocation. Through the delay-sensitive control of the logical layer, combined with the real-time guarantee of wireless scheduling at the link layer and the low-latency frame structure waveform design at the physical layer, a three-dimensional, fully endogenous low-latency and jitter deterministic support system is formed.

[0064] The L3 logical layer designs an aggregation anchor point to achieve the function of unified public processing of control plane signaling flow and user plane data flow. The aggregation anchor point can also be used for public processing of data flow within the Cell, connection with the link layer, dual connection processing between Cells, carrier aggregation, etc.

[0065] The L2 link layer is positioned for link tracking and adaptation, and adopts an ultra-thin high-aggregation HARQ only link adaptation layer design. Through optimized link tracking, early warning, terminal scheduling autonomy and assistance mechanisms, it ensures that in the absence of an ARQ retransmission mechanism, the protocol layer is reduced based on the HARQ only mechanism to achieve more efficient and fast data transmission and reliability requirements.

[0066] The L1 physical layer introduces DSSS direct sequence spread spectrum anti-interference technology and peer-to-peer UL / DL physical layer control channel design, effectively enhances anti-interference through code division multiple access, improves spectrum efficiency in exchange for low-bit rate reliable transmission, and more intelligently tracks links through peer-to-peer design, resource aggregation and other means to implement terminal autonomous scheduling mechanism and further improve transmission reliability. Description of the drawings:

[0067] Figure 1 The wireless communication system protocol stack architecture and network element of the present invention;

[0068] Figure 2 The corresponding relationship diagram of each mechanism implemented by the cooperation of each protocol layer of the system;

[0069] Figure 3 The functions of NAC modules in the L3 logical layer and their interactions;

[0070] Figure 4 UDF module functions and their interactions in the L3 logical layer;

[0071] Figure 5 The functions of the PCP modules in the L3 logical layer and their interactions;

[0072] Figure 6 L1 physical layer uplink and downlink functional modules;

[0073] Figure 7 An example of networking of the wireless communication system of the present invention;

[0074] Figure 8 An example of dual-connection networking of a wireless communication system according to the present invention;

[0075] Fig. 9 Industrial scenario application example of the wireless communication system of the present invention - traditional PLC control mode;

[0076] Fig.10 Industrial scenario application example of the wireless communication system of the present invention - cloud PLC + CU / DU separation control mode;

[0077] Fig.11 Industrial scenario application example of the wireless communication system of the present invention - 5G fusion mode;

[0078] Fig.12 The wireless communication system protocol layer and channel pair uplink / downlink data bearing and flow diagram of the present invention;

[0079] Fig.13 L3 logical layer delay-sensitive control architecture;

[0080] Fig.14 Stream preemption mechanism workflow;

[0081] Fig.15 DRB preemption and protection window operation mechanism;

[0082] Fig.16 One-to-one DRB preemption indication control frame format example;

[0083] Fig.17 One-to-many DRB preemption indication control frame format;

[0084] Fig.18 DL business flow gating mechanism process;

[0085] Fig.19 Workflow of redundancy guarantee mechanism for delay-sensitive services;

[0086] Fig. 20 UL uplink service preemption, gating, and redundancy guarantee mechanism workflow;

[0087] Fig.21 Workflow of the TE terminal preemptive scheduling mechanism triggered by QoS Flow;

[0088] Fig. 22 Highly reliable HARQ transmission mechanism process based on terminal early warning and terminal autonomous scheduling prediction;

[0089] Fig.23 Data packet segment sending process;

[0090] Fig.24 Packet reassembly receiving process flow;

[0091] Fig.25 Terminal autonomous dispatching mechanism workflow;

[0092] Fig.26 Physical layer anti-interference enhancement technology workflow based on DSSS. Specific implementation method:

[0093] The present invention will be further described below in conjunction with the accompanying drawings.

[0094] The specific meanings of the abbreviations appearing in the embodiments of the present invention and the accompanying drawings are as follows:

[0095] AM Access Management

[0096] CU Central Unit

[0097] vCU Virtual Central Unit

[0098] CPE Customer-Premises Equipment

[0099] DC Dual Connectivity

[0100] DCI Downlink Control Indicator Downlink Control Indicator

[0101] DL Downlink

[0102] DRB Data Radio Bearer

[0103] DRX Discontinuous Reception

[0104] DU Distributed Unit

[0105] EHC Ethernet Header Compression Ethernet Header Compression

[0106] HARQ Hybrid Autonomous Re-transmission Request Hybrid Automatic Retransmission Request

[0107] LBT Listen Before Talk

[0108] LLC Logical Link Control

[0109] LTE Long Term Evolution 4G Long Term Evolution

[0110] MAC Medium Access Control

[0111] MCG Master Cell Group

[0112] MBB Mobile Broadband

[0113] MIMO Multiple Input Multiple Output

[0114] MM Mobility Management

[0115] MN Master Node

[0116] MTC Machine Type Communication

[0117] NAS Non-access Stratum

[0118] NR New Radio 5G New Radio

[0119] NRT Non Real Time

[0120] OFDM Orthogonal Frequency Division Multiplex

[0121] OSS Operation Support System

[0122] OT Operation Technology

[0123] PDCCH Physical Downlink Control Channel

[0124] PDCP Packet Data Convergence Protocol Packet Data Convergence Protocol

[0125] PDU Protocol Data Unit Protocol Data Unit

[0126] PHY Physical layer

[0127] PLC Programmable Logic Controller Programmable Logic Controller

[0128] PUCCH Physical Uplink Control Channel Physical Uplink Control Channel

[0129] QoS Quality of Service

[0130] RB Radio Bearer

[0131] RLC Radio Link Control

[0132] ROHC Robust Header Compression Robust header compression

[0133] RRC Radio Resource Control

[0134] RT Real Time

[0135] SCG Secondary Cell Group

[0136] SDAP Service Data Adaptation Protocol Service Data Adaptation Protocol

[0137] SDU Service Data Unit

[0138] SM Session Management

[0139] SN Secondary Node

[0140] SPS Semi-Persistent Scheduling

[0141] SRB Signaling Radio Bearer

[0142] TB Transport Block

[0143] TBS Transport Block Size Transport Block Size

[0144] TSN Time Sensitive Network

[0145] UCI Uplink Control Indicator Uplink transmission control indicator

[0146] UE User Equipment

[0147] UL Uplink

[0148] URLLC Ultra Reliable Low Latency Communication

[0149] NAC Network Access Control

[0150] NDR Network Database

[0151] PCP Packet Convergence Processing

[0152] RAC Radio Access Control Wireless Access Control

[0153] SDA Service Data Adaptation

[0154] TE Terminal Equipment

[0155] TSC Time Sensitive Control

[0156] UDF User Data Function

[0157] XNB Node B Base Station

[0158] Embodiment 1:

[0159] like Figure 1 As shown, the wireless communication system disclosed in this embodiment includes an L3 logical layer, an L2 link layer, and an L1 physical layer arranged in sequence from top to bottom. The system adopts a quasi-symmetric air interface protocol stack design, that is, the network side and the terminal side adopt a consistent three-layer protocol and the functional entities included in each layer are also consistent. The difference between the two sides is only the difference in the management and control objects between the network side and the terminal side. In this system, each device interacts through several network element / functional unit interface definitions Hn and V0~V3, Vm interfaces. The relevant interface definitions are as follows:

[0160] Hm: management interface between OSS and NDR;

[0161] Hn: base station XNB interface;

[0162] Vm: Operation and maintenance and data management interface Vm

[0163] V3: The network database unit NDR provides the base station XNB with network global and user information through the V3 interface.

[0164] V2: Interface between XNB CU and XNB DU units;

[0165] V1: XNB DU L1 and L2 interfaces;

[0166] V0: Interface between Baseband and RF radio unit;

[0167] Uu: wireless air interface;

[0168] DN / Application can access the wireless network through Ethernet, PCIe, EtherCAT, PN, EIP and other interfaces.

[0169] Compared with the existing traditional cellular network, the wireless communication system of this embodiment adopts a core network-free (RAN only) architecture design, so that the number of interfaces between network elements is reduced to 8.

[0170] The L3 logical layer includes three functional parts: control plane, user plane, and aggregation anchor point, which build a complete differentiated scenario precise matching capability. Specifically, the L3 logical layer includes the network access control NAC module, the user data function UDF module, and the data packet aggregation PCP module;

[0171] The network access control NAC module is responsible for the signaling process control plane function and performs overall control over the terminal user's access to the network, mobility, and session management; the network access control NAC module includes various functional units with parallel design, including the radio resource control unit RRC, the access management unit AM, the session management unit SM, and the mobility management unit MM; the parallel design scheme changes the multi-level encapsulation and layered bearing mode of traditional network protocols such as 5G NR, which can effectively reduce the delay of the control plane. The interaction relationship between the NAC module and other functional modules is as follows Figure 2 As shown:

[0172] The user data function UDF module is responsible for mapping service data to service quality QoS, mapping service quality QoS to data radio bearer DRB or signaling radio bearer SRB, and performing service data flow control and transmission as well as delay-sensitive logic control; the user data function UDF module includes an intrinsic time-sensitive control unit TSC and a service data adaptation unit SDA. The functions of the UDF modules and their interactions are as follows: Figure 3 shown.

[0173] The data packet aggregation PCP module is responsible for the unified processing of signaling and data packets of the network access control NAC module and the user data function UDF module. As the packet unified ingress and egress aggregation function entity of the L3 logical layer, it interacts with the L2 link layer by establishing a mapping from radio bearers to logical channels. The data packet aggregation PCP module includes a delay-sensitive control anchor unit and a user plane data flow anchor unit. The functions of the PCP modules and their interaction relationships are as follows: Figure 4 As shown:

[0174] The PCP aggregation anchor has two functional roles: one is to serve as an aggregation point for packet data flows, and the other is to serve as an aggregation anchor for delay-sensitive control rules. The PCP delay-sensitive control rule aggregation anchor is mainly responsible for completing the transformation and mapping of delay-sensitive control policies from upper-layer UDFs into relevant control rules, and is responsible for the execution of DRB gating and DRB redundant transmission. Figure 5 The PCP-PDU is the protocol data unit from the PCP, and the PCP-PDU received by the RAC is the RAC-SDU.

[0175] Placing the packet aggregation anchor PCP function in the L3 logical layer can, on the one hand, unify the processing of packet aggregation of the radio access control RAC and the user data function UDF. On the other hand, it can better support aggregation processing such as dual connections. The packet aggregation anchor PCP supports the mapping of wireless data bearer DRB to logical channels, and uses logical channels as the interface to the link layer.

[0176] The L2 link layer is positioned for link tracking and adaptation, and adopts an ultra-thin high-aggregation HARQ only link adaptation layer design. Through the optimized link tracking, early warning, terminal scheduling autonomy and assistance mechanisms, it ensures that in the absence of an ARQ retransmission mechanism, based on the HARQ only mechanism and reducing the protocol layer, more efficient and fast data transmission and reliability requirements are achieved. The L2 link layer mainly includes the radio access control module RAC, which is responsible for the adaptive tracking of the wireless link and the transmission link adaptation. The specific functions include link adaptation and terminal early warning + scheduling tendency assisted HARQ transmission mechanism, terminal autonomous scheduling and network scheduling joint processing, power control and packet data unit PDU packaging and unpacking processing, etc. The RAC module interacts with the L3 logical layer through the logical channel and interacts with the L1 physical layer through the transmission channel, playing a connecting role between physical resources and logical data.

[0177] The L1 physical layer is mainly responsible for channel coding and decoding, rate matching, scrambling, modulation, MIMO, OFDM, DSSS, sampling rate matching and other functions of the baseband signal, and interacts with the L2 link layer through the transmission channel. The functional modules of the L1 physical layer uplink and downlink are as follows: Figure 6 As shown, the functional modules represented by the dashed boxes are optional modules.

[0178] In this embodiment, the L1 physical layer introduces innovative technical designs such as DSSS direct sequence spread spectrum anti-interference technology and peer-to-peer UL / DL physical layer control channel design. Code division multiple access is used to effectively enhance anti-interference, spectrum efficiency is improved in exchange for low bit rate reliability transmission, and peer-to-peer design, resource aggregation and other means are used to more intelligently track links, realize terminal autonomous scheduling mechanism, and further improve transmission reliability.

[0179] The protocol layers cooperate with each other to implement the above mechanisms. The corresponding relationship between the specific mechanisms and the protocol layers is as follows: Figure 2 shown.

[0180] Embodiment 2:

[0181] like Figure 7-11 This is a specific networking example of the wireless communication system disclosed in Example 1.

[0182] Figure 7This is a typical networking example, in which the base station XNB, the network database unit NDR, and the operation support system OSS are collectively referred to as network-side devices. By deploying one or more network-side unit devices, wireless communication services are provided to factories, ports, parks and other places. Each network-side device processes, encapsulates, forwards, stores, etc. the communication data in accordance with the new delay and reliability sensitive network protocol proposed in the present invention. The terminal device TE form in the figure includes but is not limited to: robotic arms, robots, tower cranes, unmanned vehicles, drones, mobile phones, notebooks, CPE terminals, etc. These terminal devices are accessed through the network interface defined in this protocol, and send and receive information in accordance with the new delay and reliability sensitive network protocol proposed in the present invention. Figure 6 The network unit composition and network interface in are described as follows:

[0183] Network unit:

[0184] TE: terminal equipment;

[0185] XNB: base station equipment, responsible for the main wireless network function processing;

[0186] NDR: Network database functional unit, responsible for global network and user information maintenance;

[0187] OSS: Network Operation, Maintenance and Management Unit;

[0188] Network Interface:

[0189] Hm: management interface between OSS and NDR;

[0190] Hn: base station XNB interface;

[0191] Vm: Operation and maintenance and data management interface Vm

[0192] V3: The network database unit NDR provides the base station XNB with network global and user information through the V3 interface.

[0193] V2: Interface between XNB CU and XNB DU units;

[0194] V1: XNB DU L1 and L2 interfaces;

[0195] V0: Interface between Baseband and RF radio unit;

[0196] Uu: wireless air interface;

[0197] DN / Application can access the wireless network through interfaces such as Ethernet, PCIe, EtherCAT, PN, and EIP.

[0198] The interface design between the network functional units of this embodiment has been streamlined. Compared with traditional cellular networks such as 5G, the number of interfaces has been reduced by more than 90%, greatly reducing the system complexity.

[0199] Figure 8 This is an example of a new type of delay and reliability-sensitive dual-connection networking, where the terminal equipment TE maintains service connections with two base stations XNB at the same time to achieve dual-link redundant reliability data transmission.

[0200] Figure 9-11 The application examples of this embodiment in industrial scenarios are disclosed, including traditional PLC control mode, cloud PLC+CU / DU separation control mode and 5G integration mode.

[0201] Fig. 9 The middle scenario example shows that factories A and B deploy their own wireless networks according to the new delay and reliability sensitive network protocol proposed in the present invention, and the wireless network equipment is operated and maintained and data managed by the uniformly deployed OSS / NDR. Inside each factory, the programmable logic controller PLC establishes a business connection with the drive through the new wireless delay and reliability sensitive network and industrial CPE, realizing factory operation technology OT automation and wireless field-level control.

[0202] Fig.10 The scenario example shows that new wireless networks are deployed in factories A and B respectively, and the wireless network equipment is operated and maintained and data managed by the uniformly deployed OSS / NDR.

[0203] Factory A: Using cloud-based PLC controllers and virtual central units vCU, distributed units DU and industrial CPE equipped with new wireless latency and reliability-sensitive network protocols are used to establish business connections with the drive, achieving factory operation technology OT automation and wireless field-level control. At the same time, the DU in Factory B is controlled by the vCU unit deployed in Factory A, achieving remote network control.

[0204] Factory B: The PLC controller establishes a business connection with the drive through the base station XNB and industrial CPE equipped with a new wireless delay and reliability sensitive network protocol, realizing factory automation and wireless OT field-level control. At the same time, the DU in Factory B is controlled by the vCU unit deployed in Factory A to achieve remote network control.

[0205] Fig.11The scenario is the integration of new latency and reliability-sensitive wireless network protocols and 5G networks to achieve the joint execution of OT field-level control and remote control, data collection and other services. The CPE terminal is responsible for driver layer data collection and sends the data to the corresponding data center for storage and processing through the 5G public network (such as Redcap, NB-IOT and other technologies). In addition, the background control center can also communicate remotely with the CPE through the 5G network, thereby realizing ultra-long-distance non-real-time remote control of the CPE.

[0206] Embodiment 3:

[0207] According to the wireless communication system provided in Embodiment 1 and Embodiment 2, this embodiment provides a delay and reliability sensitive deterministic wireless communication method, including signaling communication and data communication, specifically:

[0208] The control plane signaling transmission method is used to implement a signaling process including TE residency in a cellular cell, network access, network resource allocation and management, mobility management, and security management.

[0209] Control plane signaling transmission process: The logic layer of TE triggers the signaling process, the link layer encapsulates the signaling message, and the physical layer channel sends it to XNB via the air interface Uu, the physical layer receives and processes the signal, extracts the signaling message through the link layer, and submits it to the logic layer for processing. And vice versa.

[0210] In addition, according to the scenario requirements, XNB obtains TE information from NDR through the V3 interface to assist TE access control; according to the requirements, XNB can also update TE information to NDR through the V3 interface.

[0211] The user plane service data stream transmission method is used to realize the packetization and unpacking of the user plane service data stream, and provide a communication delay deterministic guarantee based on QoS differentiation.

[0212] The user plane service data flow transmission process is as follows Fig.12 As shown: the first service node initiates a service flow to the network XNB, the logic layer of XNB schedules the service flow based on the native delay-sensitive guarantee mechanism, allocates and schedules wireless resources through the link layer, and sends the signal to TE through the air interface Uu through the physical layer channel, and the signal is received and processed by the physical layer, and the PDU packet is processed through the link layer, and then submitted to the logic layer for service data flow processing, and finally transferred to the second service node for service logic processing. Vice versa.

[0213] Embodiment 4:

[0214] The flowchart of the delay-sensitive control mechanism of the L3 logical layer in Example 3 is as follows: Fig.13The specific steps are as follows: The UDF module checks the absolute time / clock synchronization status between the network and the terminal. If the synchronization is not completed, the delay-sensitive control process ends; if the synchronization is completed, the following steps are performed:

[0215] a) The UDF module identifies whether the data stream contains a real-time service stream. If so, it proceeds to step b). If not, the delay-sensitive control process ends.

[0216] b) The UDF module formulates the service flow preemption strategy, gating strategy, redundancy strategy and TE preemption strategy according to the service flow status;

[0217] c) (1) The PCP module generates DRB / Logical Channel preemption rules and TE terminal preemption rules according to the service flow preemption strategy and TE preemption strategy in step b), and sends them to the L2 link layer RAC module for execution.

[0218] (2) The PCP module generates gating and redundancy protection rules according to the gating strategy and redundancy strategy in step b), and executes according to the rules: data gating (temporarily closing / opening the gate / current limiting) is performed according to the gating rules;

[0219] Redundancy protection (i.e. multiple copies of data) is implemented according to redundancy rules.

[0220] d) The RAC module adjusts resource allocation in a timely manner according to the preemption rules sent by the PCP module in step c).

[0221] The above process can be divided into two categories according to the tasks to be performed with latency sensitivity:

[0222] For the service flow preemption and terminal preemption in the delay-sensitive protection mechanism, the logical layer UDF module is responsible for QoSFlow monitoring and delay-sensitive protection strategy generation, the logical layer PCP module is responsible for DRB and Logical Channel delay-sensitive protection rule formulation, and the link layer RAC is responsible for execution according to the delay-sensitive protection rules;

[0223] For the service flow gating and service flow redundancy in the delay-sensitive protection mechanism, the logical layer UDF module is responsible for QoSFlow monitoring and delay-sensitive protection strategy generation, and the logical layer PCP module is responsible for the formulation and execution of DRB and Logical Channel delay-sensitive protection rules.

[0224] The delay-sensitive control mechanism mentioned above notifies the terminal (TE) of the delay-sensitive control of the UL uplink through the RAC CE control element, and the RAC link layer of the TE reports the indication information such as UL gating and redundancy protection to the logical layer of the TE; the delay-sensitive control of the DL downlink is decided and executed by the network (XNB) itself.

[0225] For DL ​​downlink data flow, the DRB preemption rules are completed by the RAC scheduler; the DRB gating is executed by the SDA to open or close the gate; the DRB redundancy guarantee is executed by the PCP to make multiple copies of the data.

[0226] For the UL uplink logical channel flow, the preemption rules are completed by the RAC scheduler; the DRB gating is executed by the PCP to open or close the gate; the DRB redundancy guarantee is executed by the PCP to make multiple copies of the data.

[0227] For the preemption of TE terminals, XNB UDF can refer to the information of the highest priority service of each terminal, based on the service monitoring information such as the packet loss rate, delay jitter, priority change, etc. of the service. When the key service quality of the high-priority TE terminal deteriorates or becomes difficult to maintain, or the application layer service priority changes, XNB UDF initiates the preemption operation between TEs. The priority of the service scheduling of the preempted TE needs to give way to the preemptor service, that is, the preemptor service scheduling is prioritized.

[0228] The operation object of the service data flow QoS Flow preemption strategy in the above delay-sensitive guarantee mechanism includes the relationship between the preemptor and the preemptee, the operation timing includes the preemption timing, and the operation urgency includes the preemption urgency;

[0229] The operation object of the QoS Flow gating policy includes the object of the gate to be closed or opened, the operation timing includes the gate opening or closing timing, and the operation urgency includes the gating urgency;

[0230] The operation object of the QoS Flow redundancy protection policy includes the service flow object to be protected, the operation timing includes the redundancy protection timing, and the operation urgency includes the redundancy protection urgency;

[0231] The operation object of the DRB / Logical channel preemption rule includes the relationship between the preemptor and the preemptee, the operation timing includes the preemption timing, and the operation urgency includes the preemption urgency;

[0232] The operation object of the DRB gating rule includes the DRB that determines the gate to be closed or opened, the operation timing includes the gate opening or closing timing, and the operation urgency includes the gating urgency;

[0233] The operation object of the DRB redundancy protection rule includes the protection business flow object, the operation timing includes the protection timing, and the operation urgency includes the redundancy protection urgency.

[0234] Embodiment 5:

[0235] For the DL downlink service data flow preemption mechanism described in the delay-sensitive control mechanism of Example 4, the RAC module adjusts all real-time and non-real-time services of all TEs currently in progress according to the rules, and reconfigures semi-statically configured resources, pre-configured resources, and dynamic resources. The process is as follows Fig.14 As shown:

[0236] UDF is responsible for real-time dynamic monitoring of the transmission status, priority, and service quality of QoS Flow. It also determines whether to trigger a high-priority service flow to preempt the low-priority service flow to ensure the service quality of the high-priority service, generate a preemption strategy, and send it to the PCP module. After receiving the preemption strategy instruction from UDF, PCP maps the flow preemption to the DRB preemption rule and notifies the RAC application to perform the preemption operation. Among them:

[0237] Flow preemption strategy: QoS Flow dynamic priority weight (high, medium, low), preemption urgency (very urgent, emergency), etc.

[0238] DRB preemption rules: Based on policy information and the original priority of the DRB corresponding to the QoS Flow, DRB sorting and priority re-assignment (fine-tuning priority value) are performed.

[0239] DRB preemption scheduling (resource preemption): The RAC scheduler adjusts all ongoing TE services, including real-time and non-real-time services, according to the DRB preemption rules, and performs resource reconfiguration based on resource preemption for its semi-statically configured resources, pre-configured resources, dynamic resources, etc.

[0240] As an implementation method of DRB preemption:

[0241] DRB preemption protection window mechanism Fig.15 The earliest effective time of the preemption operation of the high-priority DRB service on the low-priority DRB service is based on the preemption time indication information indicated by the TSC. At the same time, it is necessary to ensure that the scheduled transmission of the low-priority DRB has been completed, including the maximum number of HARQ retransmissions.

[0242] The frame format in DRB preemption is as follows Fig.16 and 17 shown.

[0243] Fig.16 It is a one-to-one DRB preemption, that is, a high-priority DRB can only have one low-priority DRB at a time. Specifically:

[0244] Preemption policy: bit 00 indicates one-to-one preemption, bit 01 indicates one-to-many preemption; bit 11: reset the preemption relationship associated with the preemptor DRB, that is, restore to the default DRB relationship; bit 10: reserved;

[0245] Number of preemption pairs: the number of pairs of 2-tuples to be preempted indicated in the control frame, i.e. <preemptor, preemptee>;

[0246] DRB sequence number: It is not the DRB ID, but refers to the order in the DRB list configured for the TE terminal.

[0247] For the preempted DRB, in terms of resource allocation and scheduling priority, even if the original configured DRB priority corresponding to the DRB is equal to or higher than the preemptor DRB, due to the preemption relationship, when a resource conflict occurs between the preempted DRB and the preemptor DRB, its resource allocation or scheduling priority is automatically lowered to avoid it.

[0248] Fig.17 It is a one-to-many DRB preemption, that is, a high-priority DRB can preempt multiple DRBs with a priority lower than or equal to the priority at one time according to the priority threshold. Specifically:

[0249] Preemption policy: bit 00 indicates one-to-one preemption, bit 01 indicates one-to-many preemption; bit 11: reset the preemption relationship associated with the preemptor DRB, that is, restore to the default relationship; bit 10: reserved;

[0250] Number of preemption pairs: the number of pairs of 2-tuples to be preempted indicated in the control frame, i.e. <preemptor, preemptee>;

[0251] Occupied DRB priority threshold: DRBs with a priority not exceeding this threshold can be preempted by high-priority DRBs.

[0252] Embodiment 6:

[0253] The DL downlink service data flow gating mechanism in Example 4 is as follows: Fig.18 As shown, specifically:

[0254] UDF is responsible for real-time dynamic monitoring of the transmission status, priority, and service quality of QoS Flow. It also determines whether to trigger the gating operation of a certain service flow to ensure the service quality of high-priority services, and sends the gating policy to the PCP module. After receiving the gating policy indication from UDF, PCP maps the flow gating to the DRB gating rule, and applies the DRB gating operation. Among them:

[0255] Flow gating strategy: QoS Flow gating urgency (extremely urgent, urgent), QoS Flow gating operation (gate opening, closing, flow limiting), etc.

[0256] DRB gating rules: Based on QoS Flow policy information and the many-to-one mapping relationship between QoS Flow and DRB, determine the DRB that needs to perform gating operations and its operations (gate opening, closing, current limiting) and operation timing (immediate execution, waiting for the completion of the ongoing data packet transmission of the DRB). To determine the DRB gating operation, it is necessary to consider the impact of DRB gating on several QoSFlows associated with it. For example, (Flow1, Flow2) --> DRB1, the gating policy indicates that Flow1 is gated, and Flow2 is not indicated but is a critical business. In this case, the DRB gating operation may be mapped to gate current limiting.

[0257] DRB gating execution: When the gating operation time comes, PCP can start gating operation and perform corresponding actions according to DRB gating rules. Specific actions include:

[0258] Gate closing: Stop the service transmission of this DRB until the gate is reopened.

[0259] Gate opening: For a DRB whose gate is currently closed, reopen the gate according to the DRB gating rules to release the data corresponding to the DRB.

[0260] Gate current limiting: For DRBs that can be current limited, their PCP packet data packets can be current limited by delaying or sending them in batches.

[0261] Embodiment 7:

[0262] The DL downlink service data flow redundancy guarantee mechanism in Example 4 is as follows: Fig.19 As shown, UDF is responsible for real-time dynamic monitoring of the transmission status, priority, and service quality of QoSFlow. It also determines whether to trigger the redundant replication transmission operation of a certain service flow to ensure the service quality of high-priority services. The redundant protection policy is sent to the PCP module. After receiving the redundant protection policy indication from UDF, PCP maps it to the DRB redundant replication rule and applies the DRB gating operation. Among them:

[0263] Business flow redundancy protection strategy: QoS Flow gating urgency (extremely urgent, emergency), QoS Flow gating operation (gate opening, closing, flow limiting), etc.

[0264] DRB redundancy guarantee rules: Based on QoS Flow policy information and the many-to-one mapping relationship between QoS Flow and DRB, determine the DRB that needs to perform gating operations and its operations (gate opening, closing, current limiting) and operation timing (immediate execution, waiting for the completion of the ongoing data packet transmission of the DRB). To determine the DRB gating operation, it is necessary to consider the impact of DRB gating on several QoS Flows associated with it, for example, (Flow1, Flow2) --> DRB1, the gating policy indicates that Flow1 is gated, and Flow2 is not indicated but is a critical business, then the DRB gating operation may be mapped to gate current limiting.

[0265] DRB redundant transmission execution: When the timing of the gating operation arrives, PCP can start the gating operation and perform corresponding actions according to the DRB gating rules. Gate closing: Stop the service transmission of this DRB until the gate is reopened. Gate opening: For the DRB with the current gate closed, according to the DRB gating rules, reopen the gate and release the data corresponding to this DRB. Gate current limiting: For DRBs that can be current limited, their PCP packet data packets can be limited by delayed sending or sending in batches.

[0266] UL uplink service preemption, gating, and redundancy protection mechanisms such as Fig. 20 As shown, the detailed process is similar to DL redundancy and will not be elaborated in detail in this embodiment.

[0267] Embodiment 8:

[0268] The TE terminal preemptive scheduling mechanism in Example 3 is as follows: Fig.21 As shown, this mechanism is applicable to the preemption between TEs for DL ​​downlink and UL uplink services. Specifically, XNB UDF can refer to the information of the highest priority service being carried out by each terminal TE, and based on the service monitoring information such as the packet loss rate, delay jitter, and priority change of the service, when the key service quality of the high-priority TE terminal deteriorates or becomes difficult to maintain, or the priority of the application layer service changes, XNB UDF initiates the preemption operation between TEs. The priority of the service scheduling of the preempted TE needs to give way to the preemptor service, that is, the preemptor service scheduling is prioritized. Among them:

[0269] TE preemption policy: TE dynamic priority weight (high, medium, low), preemption urgency (very urgent, urgent).

[0270] TE preemption rules: TE sorting and priority re-assignment (refined priority value) are performed based on policy information and the original priority of TE.

[0271] TE preemption scheduling (resource preemption): The RAC scheduler adjusts all ongoing TE services, including real-time and non-real-time services, according to the TE preemption rules, and performs resource reconfiguration based on resource preemption for its semi-statically configured resources, pre-configured resources, dynamic resources, etc.

[0272] Embodiment 9:

[0273] Embodiment 3 The link layer is provided with a new HARQ only high-reliability transmission mechanism, that is, a high-reliability HARQ transmission mechanism based only on terminal warning and terminal autonomous scheduling prediction without ARQ retransmission. The link transmission warning mechanism relies on the warning and prediction information fed back by the terminal to perform real-time adaptive tracking and adjustment of the link transmission. The terminal's prediction information includes the warning level, the recommended MCS index and its effective time window, the update of the maximum number of HARQ retransmissions, and the update of the number of repeated transmissions and their intervals.

[0274] In this embodiment:

[0275] For the reliability of UL uplink transmission: the network XNB is responsible for monitoring and dynamically adjusting HARQ scheduling and transmission resources. Based on UL link monitoring and transmission bit error rate information, XNB adaptively adjusts the MCS of UL HARQ retransmission, as well as the timing and interval of HARQ retransmission. This ensures effective HARQ retransmission. In addition, the transmission quality is guaranteed without ARQ. The monitoring and prediction of this process are completely determined by the network XNB.

[0276] Reliability of DL downlink transmission: In order to improve the DL transmission quality, the terminal monitoring and feedback timeliness, network decision lag and other problems commonly found in wireless systems are poor. Under the HARQ only link layer mechanism, the terminal link warning and autonomous prejudgment (prediction) are introduced to timely and accurately notify the network to perform link quality improvement operations, thereby ensuring the reliability of DL link transmission. That is, a new terminal autonomous warning and prejudgment design is introduced to achieve high-reliability downlink transmission.

[0277] The workflow diagram of this mechanism is as follows Fig. 22 As shown, specifically

[0278] 1) The terminal monitors the DL downlink in real time;

[0279] 2) The terminal determines whether it needs to report warning information and its predicted scheduling reference information to the network based on the DL link deterioration;

[0280] 3) If the current channel and future channel deterioration trend reaches the terminal preset decision threshold, the terminal immediately selects an appropriate method for early warning and pre-judgment reporting. Optional reporting methods include physical layer UCI, link layer RAC CE, logical layer RRC signaling, etc. The terminal can independently select one or more reporting methods to report to the network based on information such as the degree of urgency and the criticality of service quality. Terminal pre-judgment information and scheduling autonomy auxiliary information include but are not limited to: warning level, recommended MCS index and its effective time window, update of the maximum number of HARQ retransmissions, update of the number of repeated transmissions and retransmission intervals, etc.

[0281] 4) After receiving the early warning and prediction indication information from the terminal, the network comprehensively judges the service priority of the UE, the overall available resources, the overall factors of all terminals served by the network, the backup means of reliability assurance, and other factors, and makes a comprehensive decision to determine whether to adjust the scheduling and wireless resource allocation, and the timing of the adjustment.

[0282] 5) After the network determines the scheduling and radio resource allocation adjustment information, it selects the appropriate notification method according to the resource allocation mode (dynamic, semi-static, etc.) of the current service: DCI / RAC CE / RRC signaling, etc.

[0283] 6) The terminal performs DL downlink data reception and demodulation according to the adjusted transmission configuration.

[0284] Embodiment 10:

[0285] The L2 link layer RAC in Example 3 includes a localized sinking fast processing function that associates segmentation / reassembly with link status. By associating segmentation / reassembly with link status, the service data units SDUs are segmented and reassembled quickly and integratedly according to the link status. This function uses localized sinking fast processing, that is, according to real-time tracking of the link status and scheduler judgment, fast local processing of segmentation and reassembly is performed in real time without cross-layer interaction, thereby simplifying the protocol stack architecture and efficient and low-latency transmission of service data. The workflow of data packet segmentation transmission and reassembly reception is as follows: Fig.23 , 24 shown.

[0286] Embodiment 11:

[0287] As an improvement of the above-mentioned embodiment, the L1 physical layer of this embodiment forms a symmetrical design with the downlink PDCCH and DCI by designing a new PUCCH and UCI for uplink scheduling control information transmission, and endows the terminal device with a certain degree of autonomous scheduling capability by adopting a new uplink and downlink symmetrical physical channel structure design. It is worth noting that the physical layer of existing wireless network protocols such as 3GPP, WiFi, SparkLink, etc. is an asymmetric channel structure design, and the technical features proposed in the present invention are completely different from the existing protocols.

[0288] Based on the above characteristics, the L1 physical layer of this embodiment supports four scheduling modes including PDCCH-DCI-based dynamic scheduling, SPS semi-static scheduling, pre-configured scheduling, and PUCCH-UCI adaptive scheduling autonomously by new terminals. The method steps of autonomous PUCCH-UCI adaptive scheduling by new terminals are as follows: Fig.25 As shown, specifically:

[0289] 1) The terminal device TE receives the pre-allocated resource set sent by the base station XNB;

[0290] 2) The terminal device TE determines whether to initiate autonomous scheduling based on the current link status;

[0291] 3) If the terminal equipment TE enters the autonomous scheduling state, the wireless resources and the coding modulation scheme MCS are determined based on the pre-allocated resource set obtained in step 1 according to the current channel conditions; and then the new UCI format proposed in the present invention is sent to the base station XNB through the new PUCCH proposed in the present invention;

[0292] 4) The base station XNB performs UCI blind detection based on PUCCH resources, determines the autonomously allocated time-frequency resource location and coding modulation scheme, and performs PUSCH data demodulation.

[0293] 5) If the terminal equipment TE does not perform autonomous scheduling, data transmission is performed based on the pre-allocated resources obtained in step 1 according to the scheduling information indicated by the base station side.

[0294] The pre-allocated resource set adopts a two-level design, namely the first resource: a fixed dedicated resource set reserved for high-priority real-time services; the second level is a TE group shared resource set, that is, multiple TEs in a group share. The second-level resource set can be enabled when the first-level resources are insufficient and cannot meet service requirements.

[0295] Embodiment 12:

[0296] As an improvement of the above embodiment, Fig.26As shown, in this embodiment, the L1 physical layer adds an anti-interference module based on DSSS spread spectrum, so that the network can adaptively enable spread spectrum technology based on the channel interference status to ensure high reliability transmission of data. The specific steps are as follows:

[0297] 1) The base station decides whether to enable the spread spectrum anti-interference function based on the channel interference status and the pre-designed adaptive threshold;

[0298] 2) If the spread spectrum anti-interference function is enabled, the base station configures specific spread spectrum anti-interference related parameters such as spread spectrum factor, spread spectrum sequence, spread spectrum start and end time;

[0299] 3) The base station sends the configured spread spectrum related parameters to the terminal TE through any method such as PDCCH DCI, RAC CE control unit, NAC signaling, etc.

[0300] 4) The base station and the terminal perform uplink and downlink transmission based on spread spectrum anti-interference according to the configured spread spectrum start and end time.

[0301] Embodiment 13:

[0302] As an improvement of the above embodiment, the L1 physical layer also has a baseband sampling rate adaptation functional unit, which reduces or increases the sampling rate of the target signal by decimating or interpolating the baseband signal and combining digital filtering to adapt the RF device or chip. The sampling rate adaptation function solves the problem of mismatch between the protocol standard sampling rate and the sampling rate supported by the RF device, so that RF modules with limited sampling rate types can be reused between different standard protocol systems.

[0303] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A delay and reliability sensitive deterministic wireless communication system, characterized by: The wireless communication system adopts a quasi-symmetric air interface protocol stack design, including a network side and a terminal side. Both the network side and the terminal side adopt a three-layer protocol with the same architecture. The three-layer protocol corresponds to an L3 logical layer, an L2 link layer, and an L1 physical layer arranged in sequence from top to bottom. The collaboration between the protocol layers constitutes a delay-sensitive protection mechanism to control and protect the system delay. The L3 logic layer is responsible for network access control and resource management and service data flow processing of the wireless communication system, including: A network access control NAC module, which is responsible for the signaling flow control plane function and performs overall control over terminal user access to the network, mobility, and session management; A user data function UDF module, which is used for mapping service data with quality of service QoS, mapping quality of service QoS with data radio bearer DRB or signaling radio bearer SRB, service data flow control and transmission, and control of delay-sensitive logic; Data packet aggregation PCP module, which is responsible for the unified processing of signaling and data packets of the network access control NAC module and the user data function UDF module, and as a packet unified inlet and outlet aggregation function entity of the L3 logical layer, interacts with the L2 link layer by establishing a mapping from radio bearers to logical channels; The L2 link layer provides data transmission to the L3 logical layer and performs wireless resource management, and the L2 link layer includes a wireless access control module RAC; The L1 physical layer provides data transmission, HARQ feedback signaling transmission, scheduling request signaling transmission, and channel measurement and result reporting services to the L2 link layer.

2. The wireless communication system according to claim 1 is characterized in that: The L3 logic layer interacts with the L2 link layer through a logical channel, wherein the logical channel includes a service logic channel and a control logic channel, wherein the service logic channel is used to carry DRB, and the control logic channel is used to carry SRB, broadcast and paging information; The L2 link layer interacts with the L1 physical layer through a transport channel.

3. The wireless communication system according to claim 2 is characterized in that: The service logic channel type is divided into real-time service logic channel and non-real-time service logic channel according to the real-time nature of the service.

4. The wireless communication system according to claim 1 is characterized in that: The network access control NAC module includes multiple functional units designed in parallel, and the multiple functional units include a radio resource control unit RRC, an access management unit AM, a session management unit SM and a mobility management unit MM; The user data function UDF module includes an endogenous time sensitive control unit TSC and a service data adaptation unit SDA; The data packet convergence PCP module includes a delay-sensitive control anchor point unit and a user plane data flow anchor point unit.

5. The wireless communication system according to claim 4 is characterized in that: The network access control NAC module also includes a global logic controller for global scheduling processing of all TE state maintenance, signaling flow control, and signaling priority sorting in the signaling pool constituted by the signaling of each functional unit in the network access control NAC module.

6. The wireless communication system according to claim 1 is characterized in that: The L1 physical layer includes a multiple access unit, a physical channel providing unit, a modulation and demodulation unit, a channel coding and decoding unit, a physical layer process unit and a physical layer measurement unit.

7. The wireless communication system according to claim 1 is characterized in that: The wireless communication system interacts via the network element interfaces Hx and Vx; The network element interface Hx includes Hm and Hn, wherein Hm is the management interface between OSS and NDR, and Hn is the interface between XNBs; The network element interface Vx includes V3, V2, V1, and V0, wherein V3 is the interface for the network database unit NDR to provide the XNB with network global and user information; V2 is the interface between the XNB central unit CU and the XNB distributed unit DU; V1 is the interface between the L1 physical layer and the L2 logical layer of the XNB's distributed unit DU; and V0 is the interface between the baseband and the RF radio frequency unit.

8. A communication method of a wireless communication system according to any one of claims 1 to 7, characterized in that: The communication method includes a control plane signaling transmission method and a user plane service data flow transmission method; The control plane signaling transmission method is used to implement the signaling process of TE residence in a cellular cell, network access, network resource allocation and management, mobility management, and security management; The user plane service data stream transmission method is used to realize the packetization and unpacking of the user plane service data stream and provide a communication delay deterministic guarantee based on QoS differentiation.

9. The communication method according to claim 8, characterized in that: The control plane signaling transmission method is specifically as follows: The logic layer of TE triggers the signaling process, and the link layer encapsulates the signaling message, which is sent to XNB through the air interface Uu by the physical layer channel. The physical layer receives and processes the signal, extracts the signaling message through the link layer, and submits it to the logic layer for processing. XNB can obtain TE information from NDR to assist TE access control. XNB can also update TE information to NDR. The user plane service data flow transmission method is specifically as follows: The first service node initiates a service process to the network XNB. The logic layer of XNB schedules the service flow based on the native delay-sensitive guarantee mechanism, allocates and schedules wireless resources through the link layer, and sends it to TE through the physical layer channel via the air interface Uu. The physical layer performs signal reception processing, and the link layer performs PDU grouping data packet processing, which is submitted to the logic layer for service data flow processing, and finally transferred to the second service node for service logic processing.

10. A wireless communication method according to claim 9, characterized in that: The native delay-sensitive guarantee mechanism distinguishes between real-time and non-real-time data bearers at each level in the three-level mapping relationship of QoS Flow-DRB-Logical Channel, formulates a delay-sensitive control strategy for the real-time indicator of each real-time data bearer, and generates corresponding rules based on the strategy to perform delay-sensitive control on the corresponding real-time data bearer.

11. A wireless communication method according to claim 10, characterized in that: The delay-sensitive control strategy includes one or more combinations of service flow preemption, service flow gating, service flow redundancy, and terminal preemption.

12. A wireless communication method according to claim 11, characterized in that: The UDF module at the logical layer formulates a delay-sensitive control strategy based on the real-time indicators of the real-time data carrier. The PCP module generates delay-sensitive control rules for the real-time data carrier based on the strategy provided by the UDF module. The PCP module chooses to execute it itself or send it to the RAC module based on the rule type.

13. A wireless communication method according to claim 12, characterized in that: The types of delay-sensitive control rules correspond to the types of delay-sensitive control policies one by one, wherein service flow preemption and terminal preemption are executed by the RAC module, and service flow gating and service flow redundancy are executed by the PCP module.

14. A wireless communication method according to claim 8, characterized in that: The L2 link layer RAC is provided with an enhanced HARQ only retransmission mechanism and a link transmission early warning mechanism; The specific steps of the enhanced HARQ only retransmission mechanism and link transmission early warning mechanism are as follows: a) The terminal monitors the DL downlink in real time; b) The terminal determines whether it needs to report warning information and its predicted scheduling reference information to the network based on the DL link deterioration; c) If the current channel and future channel deterioration trend reaches the terminal's preset decision threshold, the terminal will immediately issue an early warning and pre-judgment report; d) After receiving the early warning and prediction indication information from the terminal, the network comprehensively judges the service priority of the UE, the overall available resources, the overall factors of all terminals served by the network, and the backup means factors for reliability assurance, and makes a comprehensive decision to determine whether to adjust the scheduling and wireless resource allocation, and the timing of the adjustment; e) After the network determines the scheduling and radio resource allocation adjustment information, it selects the appropriate notification method according to the resource allocation mode of the current service; f) The terminal performs DL downlink data reception and demodulation processing according to the adjusted transmission configuration.

15. A wireless communication method according to claim 14, characterized in that: The terminal's early warning and prediction reporting methods include physical layer UCI, link layer RAC CE, and logical layer RRC signaling. The terminal autonomously selects one or more reporting methods to report to the network based on the degree of urgency and service quality criticality information; the terminal prediction information and scheduling autonomy auxiliary information include the early warning level, the recommended MCS index and its effective time window, the update of the maximum HARQ retransmission number, and the update of the number of repeated transmissions and the retransmission interval.

16. A wireless communication method according to claim 8, characterized in that: The L2 link layer RAC module segments or reassembles the service data units SDUs according to the link status.

17. A wireless communication method according to claim 8, characterized in that: The L1 physical layer can implement terminal-autonomous PUCCH-UCI adaptive scheduling, and the implementation steps are: a) The terminal equipment TE receives the pre-allocated resource set sent by the base station XNB; b) The terminal device TE determines whether to initiate autonomous scheduling based on the current link status; c) If the terminal equipment TE enters the autonomous scheduling state, the wireless resources and the coding modulation scheme MCS are determined based on the pre-allocated resource set obtained in step a) according to the current channel conditions, and then an uplink transmission control indication UCI is sent to the base station XNB through the PUCCH; d) The base station XNB performs UCI blind detection based on PUCCH resources, determines the autonomously allocated time-frequency resource location and coding modulation scheme, and performs PUSCH data demodulation; e) If the terminal equipment TE does not perform autonomous scheduling, data transmission is performed based on the pre-allocated resources obtained in step a) according to the scheduling information indicated by the base station side.

18. A wireless communication method according to claim 8, characterized in that: The L1 physical layer uses the DSSS spread spectrum anti-interference module to achieve network adaptive spread spectrum based on channel interference status. The steps are: a) The base station decides whether to enable the spread spectrum anti-interference function based on the channel interference status and the pre-designed adaptive threshold; b) If the spread spectrum anti-interference function is enabled, the base station configures parameters related to the spread spectrum anti-interference, wherein the parameters related to the spread spectrum anti-interference include the spread spectrum factor, the spread spectrum sequence, and the spread spectrum start and end time; c) The base station sends the configured spread spectrum related parameters to the terminal TE through any of the PDCCH DCI, RAC CE control unit or NAC signaling; d) The base station and the terminal perform uplink and downlink transmission based on spread spectrum anti-interference according to the configured spread spectrum start and end time.

19. A wireless communication method according to claim 8, characterized in that: The L1 physical layer includes a sampling rate adaptation functional unit for sampling rate adaptation, and the sampling rate adaptation functional unit implements the sampling rate adaptation method as follows: Perform decimation or interpolation operations on the signal to reduce or increase the sampling rate to adapt to the different sampling rates of signals with different protocol standards; The sampling rate adaptation functional unit may be located at any position before or after the OFDM signal generation module.

20. A wireless communication method according to claim 8, characterized in that: The L2 link layer RAC module is responsible for DRB / Logical channel preemption and terminal scheduling preemption execution; and reorders the scheduling priorities of DRBs and TE terminals and reallocates wireless resources based on the DRB preemption rules.

Images