Service signal sending method and related equipment

Abstract

The invention provides a service signal sending method and related equipment, and relates to a wireless communication system. The sending method comprises: an access network device obtaining an effective capacity demand corresponding to a user equipment, the effective capacity being used for indicating a data transmission rate of a channel satisfying a data transmission requirement corresponding to a business service, the data transmission requirement comprising a signal delay requirement; and the access network equipment determines a pre-code corresponding to the downlink channel according to the effective capacity demand, and the pre-code is used for adjusting the channel capacity of the downlink channel, so that the channel capacity of the downlink channel meets the effective capacity demand. And the access network equipment preprocesses a service signal corresponding to the service according to the precoding, and sends the preprocessed service signal to the user equipment through a downlink channel. In the embodiment of the invention, the access network equipment can ensure that the channel capacity corresponding to each user equipment can meet the real-time and integrity requirements of the service data. Therefore, the total effective capacity of the whole system can be improved while the total throughput of the system is ensured.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of wireless communication, and in particular to a method for transmitting service signals and related devices. BACKGROUND

[0002] Real-time multimedia services, as one of the core services of 5.5G network development, are expected to become the dominant service of the next generation of wireless communication networks. Specifically, broadband real-time interactive services such as metaverse and extended reality (XR) are included. For these services, service data has high real-time and integrity requirements, i.e., service data needs to be transmitted completely and without error under certain delay constraints. If the service data received by the user end does not meet the real-time and integrity requirements, the user end will no longer use these service data, but will discard them directly, which will cause waste of network transmission resources.

[0003] Nowadays, wireless communication systems based on massive antenna technology can support more user equipment. Precoding technology can effectively suppress interference in massive antenna transmission and improve the peak rate of the link. Specifically, precoding adjusts the signal transmission power and direction of the antenna to suppress channel interference, thereby affecting the channel capacity. Generally, wireless communication systems determine system precoding with the goal of optimizing the total throughput of the system, which will cause the system to preferentially improve the channel capacity of channels with good channel quality and reduce the channel capacity of channels with poor channel quality.

[0004] For the user end, the greater the channel capacity of the corresponding channel, the shorter the transmission delay of the service data and the higher the integrity. If system precoding is determined based on optimizing the total throughput of the system, user ends with better channel quality will obtain higher data transmission rates. In this way, user ends with good channel quality may occupy too many network resources, resulting in resource waste. User ends with poor channel quality will be sacrificed, and the service data they transmit often cannot meet the real-time and integrity requirements due to low channel data transmission rates, and thus cannot be used by the user end. In this way, the total effective capacity of the entire system (effective capacity: the channel capacity when the channel can meet the data transmission requirements of the service data) will be severely affected. Therefore, how to meet the service requirements of as many user ends as possible while improving the total effective capacity of the wireless communication system has become a problem to be solved. SUMMARY

[0005] The embodiment of the present application provides a sending method of service signals and related equipment. When sending service signals, the access network equipment determines the precoding of the system downlink channel according to the effective capacity requirements of the channels corresponding to the user equipment, so that the access network equipment can reasonably allocate the transmission resources of the wireless communication network, and the wireless communication network can support the service requirements of as many user equipment as possible. Specifically, the access network equipment can ensure that the channel capacity corresponding to each user equipment can meet the real-time and integrity requirements of the service data. In this way, the total effective capacity of the whole system can be improved while ensuring the total throughput of the system.

[0006] In a first aspect, the embodiment of the present application provides a sending method of service signals, which comprises the following steps:

[0007] When providing service services for the user equipment, the access network equipment first acquires the effective capacity requirements corresponding to each user equipment. The effective capacity requirement is used to indicate a data transmission requirement of the user equipment. Specifically, the effective capacity is used to represent the data transmission rate of the channel when meeting the data transmission requirements, such as signal delay requirements, of the service service. Then the access network equipment determines the precoding of the system downlink channel according to the effective capacity requirements corresponding to each user equipment. The precoding controls the interference of each channel by adjusting the signal transmission power and direction of each sending antenna, and then adjusts the channel capacity of each channel, so that the channel capacity of the downlink channel corresponding to each user equipment meets the effective capacity requirement thereof. Finally, the access network equipment pre-processes the service signals of the service services corresponding to the user equipment according to the precoding, and then sends the pre-processed service signals to the user equipment through the downlink channel.

[0008] In the embodiment of the present application, the access network equipment determines the system precoding according to the effective capacity requirements corresponding to each user equipment, so that the channel capacity corresponding to each user equipment adjusted by the precoding can meet the signal delay requirements of the service services corresponding to each user equipment, to avoid that a large amount of service data cannot be normally used by the user equipment, thereby preventing the waste of network transmission resources. Meanwhile, the access network equipment can more reasonably allocate the network transmission resources, so that the wireless communication network can support as many user equipment as possible, and improve the total effective capacity of the whole system while ensuring the total throughput of the system.

[0009] In an optional implementation, the wireless communication network can provide a service service for a certain user equipment, or provide a mixed service service for the user equipment, that is, the service service corresponding to the user equipment has N, and N is a natural number greater than or equal to 1. The effective capacity is also used to represent the data transmission rate of the channel when meeting the signal integrity requirements of the service service.

[0010] In an optional implementation, when the wireless communication network provides a hybrid service (i.e., multiple service services) for the user equipment, the multiple service services correspond to multiple signal delay requirements and multiple signal integrity requirements. This is because each service service corresponds to a signal delay requirement and a signal integrity requirement. Then, when determining the effective capacity requirement corresponding to the user equipment, the shortest signal delay requirement in the multiple signal delay requirements and the highest signal integrity requirement in the multiple signal integrity requirements need to be determined first. In this way, the effective capacity requirement represents the most stringent data transmission requirement of the user equipment. If the channel capacity of the channel corresponding to the user equipment can meet the most stringent effective capacity requirement, then all service services corresponding to the user equipment can be supported.

[0011] In an optional implementation, the user equipment can determine its effective capacity requirement according to the data transmission requirement (i.e., the shortest signal delay requirement and the highest signal integrity requirement of the service service) of the service service corresponding thereto, and then report the effective capacity requirement to the access network device. Specifically, the user equipment feeds back an effective capacity requirement identifier to the access network device, and then the access network device determines the effective capacity requirement of the user equipment by identifying the effective capacity requirement identifier.

[0012] In an optional implementation, the access network device can also estimate the effective capacity requirement corresponding to each user equipment by itself. Specifically, each user equipment reports the shortest signal delay requirement and the highest signal integrity requirement of the service service corresponding thereto, and then estimates the effective capacity of the user equipment according to the shortest signal delay requirement and the highest signal integrity requirement. Then, the access network device determines the effective capacity requirement corresponding to the user equipment according to the estimated effective capacity.

[0013] In an optional implementation, the access network device can also adjust the effective capacity requirement corresponding to each user equipment through feedback information sent by the user equipment. The feedback information includes delay state information, transmission error rate information and data volume information of the received service signal, and the access network device adjusts the feedback information to obtain an evaluation of the channel capacity allocated to the user equipment, and then adjusts the effective capacity requirement in the next round according to the evaluation.

[0014] In an optional implementation, the precoding is used to affect the channel capacity of the downlink channel by adjusting the signal transmission power and direction of the transmission antenna corresponding to the downlink channel, and therefore when determining the precoding, the constraint condition of the signal transmission power of the transmission antenna needs to be ensured. That is, the signal transmission power of each transmission antenna is ensured to be less than a preset power threshold, so as to protect the equipment in the wireless communication system.

[0015] In a second aspect, an embodiment of the present application provides an access device, which comprises:

[0016] The acquisition unit is configured to acquire an effective capacity requirement corresponding to the user equipment. The effective capacity is used to indicate a transmission rate of a channel satisfying a data transmission requirement of the service, and the data transmission requirement includes a signal delay requirement.

[0017] The determination unit is configured to determine a precoding corresponding to the downlink channel according to the effective capacity requirement, and the precoding is used to adjust a channel capacity of the downlink channel so that the channel capacity of the downlink channel satisfies the effective capacity requirement.

[0018] The processing unit is configured to pre-process a service signal corresponding to the service according to the precoding.

[0019] The transceiver unit is configured to send the pre-processed service signal to the user equipment through the downlink channel.

[0020] In an optional embodiment, the user equipment corresponds to N service requirements, and N is a natural number greater than or equal to 1. The data transmission requirement further includes a signal integrity requirement.

[0021] In an optional embodiment, N is a natural number greater than 1, and the N services correspond to N signal delay requirements and N signal integrity requirements.

[0022] The effective capacity requirement is determined according to a shortest signal delay requirement in the N signal delay requirements and a highest signal integrity requirement in the N signal integrity requirements.

[0023] In an optional embodiment, the acquisition unit is specifically configured to acquire an effective capacity requirement identifier fed back by the user equipment. The effective capacity requirement identifier is determined by the user equipment based on the shortest signal delay requirement and the highest signal integrity requirement.

[0024] The determination unit is further configured to identify the effective capacity requirement identifier to determine the effective capacity requirement.

[0025] In an optional embodiment, the acquisition unit is specifically configured to acquire the shortest signal delay requirement and the highest signal integrity requirement.

[0026] The determination unit is further configured to calculate an effective capacity according to the shortest signal delay requirement and the highest signal integrity requirement, and determine the effective capacity requirement according to the effective capacity.

[0027] In an optional embodiment, the transceiver unit is further configured to receive feedback information sent by the user equipment, and the feedback information includes delay state information, transmission error rate information and data volume information of the service signal.

[0028] The determination unit is further configured to adjust the effective capacity requirement corresponding to the user equipment according to the feedback information.

[0029] In an optional implementation, the precoding is used to adjust the signal transmission power and direction of the transmission antenna corresponding to the downlink channel. The signal transmission power and direction of the transmission antenna are related to the channel capacity of the downlink channel, and the signal transmission power of the transmission antenna is less than a preset power threshold.

[0030] In a third aspect, an access network device is provided. The access network device includes a processor and a memory. The processor is coupled to the memory. The memory is configured to store computer instructions. The computer instructions are loaded and executed by the processor to enable the access network device to implement any of the methods for transmitting a service signal according to the first aspect.

[0031] In a fourth aspect, a computer readable storage medium is provided. The computer readable storage medium stores at least one computer program instruction. The computer program instruction is loaded and executed by a computer to implement any of the methods for transmitting a service signal according to the first aspect.

[0032] In a fifth aspect, a wireless communication system is provided. The wireless communication system includes an access network device and a user equipment. The access network device implements any of the methods for transmitting a service signal according to the first aspect to transmit the service signal to the user equipment through the wireless communication network.

[0033] The technical effects brought by any of the implementation manners of the third aspect to the fifth aspect can refer to the technical effects brought by the corresponding implementation manners of the first aspect and the second aspect, which will not be described herein.

[0034] In the embodiments of the present application, the access network device first acquires the effective capacity requirements of each user equipment, and then determines the system precoding according to the effective capacity requirements of each user equipment. Finally, the access network device transmits the service signal according to the precoding. The precoding is used to adjust the channel capacity of the downlink channel corresponding to each user equipment. The system precoding determined according to the effective capacity requirements of each user equipment can ensure that the channel capacity of the downlink signal corresponding to each user equipment meets its effective capacity requirement, so that the transmission of the service signal meets the signal delay requirement of the service. In this way, the user equipment can normally use the service signal, avoiding the situation that a large amount of service data cannot be normally used by the user equipment, thereby preventing the waste of network transmission resources. At the same time, the access network device can more reasonably allocate network transmission resources, so that the wireless communication network can support as many user equipments as possible, while ensuring the total throughput of the system and improving the total effective capacity of the entire system. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A structure diagram of the effective capacity under the queuing theory according to the embodiments of the present application;

[0036] Figure 2 A network architecture diagram of a wireless communication system provided for an embodiment of the present application;

[0037] Figure 3 A structure schematic diagram of a wireless communication system provided for an embodiment of the present application;

[0038] Figure 4 A flow schematic diagram of a service signal sending method provided for an embodiment of the present application;

[0039] Figure 5 A flowchart of an iteration algorithm of a precoding matrix V provided for an embodiment of the present application;

[0040] Figure 6 A structure schematic diagram of an access device provided for an embodiment of the present application;

[0041] Figure 7 A structure schematic diagram of an access device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0042] Embodiments of the present application provide a service signal sending method and related devices. When sending a service signal, an access network device determines the precoding of a system downlink channel according to the effective capacity requirement of a channel corresponding to each user equipment, so that the access network device can reasonably allocate the transmission resources of a wireless communication network, so that the wireless communication network can support the service requirements of as many user equipments as possible. Specifically, the access network device can ensure that the channel capacity corresponding to each user equipment can meet the real-time and integrity requirements of its service data. In this way, the total effective capacity of the entire system can be improved while ensuring the total throughput of the system.

[0043] In the description of the present application, unless otherwise specified, " / " represents that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural.

[0044] In the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c, can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0045] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms of "first", "second", etc. are used to distinguish the same or similar items or items with basically the same function and role. Those skilled in the art can understand that the terms of "first", "second", etc. do not limit the quantity and execution order, and the terms of "first", "second", etc. also do not limit the difference.

[0046] In the embodiments of the present application, the words such as "exemplary" or "for example" are used to represent as an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific manner, for the convenience of understanding.

[0047] It can be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It can be understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the execution order, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0048] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects. Also, in some scenarios, it can be combined with other features according to the demand. Correspondingly, the devices given in the embodiments of the present application can also realize these features or functions, which are not described here.

[0049] In the present application, except for special description, the same or similar parts between various embodiments can be mutually referred. In the present application, if there is no special description and logical conflict between different embodiments, the terms and / or descriptions of different embodiments are consistent and can be mutually referred. Different embodiments can be combined to form new embodiments according to their inherent logical relationship. The following embodiments of the present application do not constitute a limitation on the protection scope of the present application.

[0050] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the following first gives a brief introduction of the related technologies of the embodiments of the present application:

[0051] Real-time multimedia service is one of the core services of 5.5G network development, and is expected to become the dominant service of the next generation of wireless communication networks. Specifically, it includes real-time broadband communication (RTBC) services such as the metaverse and augmented reality (XR), and XR devices supporting such services are widely considered to be new form devices that are expected to replace mobile phones as the next generation of mobile personal terminals.

[0052] Among them, multimedia data is composed of data components such as text, graphics, images, audio and video data that are related in content. Its most obvious feature is the complexity of data types and the large amount of data information. In addition to the characteristics of multimedia data itself, real-time multimedia data also has important characteristics such as high data rate, high latency and latency jitter requirements, real-time interaction, data synchronization, etc. That is, real-time multimedia data has very high real-time and integrity requirements. Specifically, real-time means that real-time multimedia data needs to be transmitted within a certain latency constraint, and integrity means that real-time multimedia data needs to be transmitted completely and without error. For the user end, if the received data does not meet the real-time and integrity requirements, the user end will not use these data normally, but will discard these data directly. For example, if a video frame data is not transmitted correctly (integrity requirement) to the user end within the specified display time (real-time requirement), the user end will not display the video frame after receiving it, but will discard it directly. This is because the video frame is already outdated content and has no meaning to display.

[0053] Therefore, when providing real-time multimedia services for user equipment, wireless communication networks need to meet the real-time and integrity requirements of such services. Otherwise, the invalid data transmitted cannot provide service for user equipment, and will also greatly waste the transmission resources of wireless communication networks. Therefore, wireless communication networks need to support large bandwidth, low interaction latency and high data integrity (the proportion of data packets that are transmitted completely and without error in the data stream should be large) to meet the immersive experience when people interact with the virtual world.

[0054] Nowadays, wireless communication systems based on massive antenna technology can support more user equipments. While the massive antenna technology improves the system performance, it also has a great interference problem, and the multipath caused by multi-antenna transmission cannot be ignored. Since the implementation of the interference suppression algorithm at the receiving end is usually more complex, the current pre-coding technology is usually used to pre-process the data at the sending end to achieve the purpose of suppressing and interference cancellation. Specifically, the massive antenna technology realizes multi-port transmission through pre-coding technology to realize the parallel transmission of multiple data streams. In this way, the peak rate of the link can be effectively improved, and at the same time, the number of users that the system can simultaneously transmit services is also more, and the spectrum efficiency is higher.

[0055] Specifically, in a wireless communication system, multiple antennas provide multiple channels for multiple user equipments, and pre-coding technology adjusts the signal transmission power and direction of each sending antenna to suppress the channel interference of each channel. According to Shannon's law, for a channel, the smaller the channel interference, the larger the channel capacity. The larger the channel capacity, the stronger the data transmission capability of the channel, and the shorter and higher integrity of the transmitted service data. Therefore, if the wireless communication system wants to provide real-time multimedia services for a user equipment, the channel capacity of the channel transmitting the multimedia data corresponding to the real-time multimedia service needs to match the real-time and integrity requirements of the real-time multimedia service.

[0056] The design of the current wireless communication system has long been aimed at optimizing the total throughput of the system, and the pre-coding of the physical layer is no exception. The optimization goal of system pre-coding is generally the sum rate of the system, that is, the designed system pre-coding wants to maximize the sum rate of each channel of the system as much as possible. This will result in that the better the channel quality of a channel, the higher the data transmission rate of the channel will be, and the worse the channel quality of a channel, the lower the data transmission rate of the channel will be. Thus, for the user end, if the channel quality of the channel corresponding to the user end is better, the channel will obtain a higher data transmission rate, but in fact, the real-time multimedia service corresponding to the user end may not need such a high data transmission rate to guarantee its real-time and integrity requirements, so the channel corresponding to the user end will often occupy too many network transmission resources. If the channel quality of the channel corresponding to the user end is very poor, the channel will obtain a very low data transmission rate, so the data transmission of the channel may not be able to meet the real-time and integrity requirements of the real-time multimedia service corresponding to the user end, and the invalid data transmitted cannot be normally used by the user end, and also causes waste of system transmission resources.

[0057] From the above description, it can be seen that the system precoding determined by optimizing the system and rate usually results in that the network transmission resource corresponding to each user terminal does not match the service requirement (real-time and integrity requirement) of the real-time multimedia service. This results in that the user terminal with good channel quality occupies too much network transmission resource, and the system cannot meet the service requirement of the user terminal with poor channel quality, and cannot provide service for this part of users. Therefore, the wireless communication system cannot meet the service requirement of more users, and also results in waste of system transmission resource.

[0058] The above problem will be described from the perspective of effective capacity. It can be understood that the real-time multimedia service has delay and integrity requirement. For the user terminal, the user terminal can only use the multimedia data accurately transmitted within the delay constraint. These data used normally are effective data. The service data not meeting the delay and integrity requirement, even if successfully transmitted to the user terminal, will not be used by the user terminal, but directly discarded. These discarded data are invalid data. Thus, it can be seen that the actual effective throughput of the user terminal and the throughput of the network air interface cannot be directly corresponded.

[0059] The effective capacity is used to reflect the data transmission rate of the channel in the network air interface, which can meet the signal delay requirement and signal integrity requirement of the service of the user terminal corresponding to the channel. The effective capacity is used as a performance index to measure the statistical quality of service (QoS) or system performance under delay constraint in the queuing dynamic situation. According to the theory of queuing, the effective capacity is defined as the maximum constant arrival that can be supported when the QoS constraint is met under the condition that the probability of queue overflow or delay violation is guaranteed. As shown in Figure 1 The maximum capacity that the system can support when the timeout probability of the data in the queue does not exceed the constraint θ under the service rate r and the arrival rate mu is the effective capacity.

[0060] Two examples are given to describe the effective capacity of the channel. When the video frame is transmitted to the user equipment, when the first video frame is received by the user equipment under the delay constraint condition, the throughput of the system is improved, and the effective capacity is also improved. When the transmission delay of the second video frame is greater than the delay constraint condition (maximum delay), the second video frame cannot be normally used by the user, at this time, the throughput of the system is still improved, but the effective capacity is not improved.

[0061] Suppose a video frame contains 4 data packets, numbered 1, 2, 3, and 4. When the first video frame is completely received, the throughput of the system is improved, and the effective capacity is also improved. When the second video frame is transmitted, data packets numbered 1 and 2 are completely received, but data packet numbered 3 is still lost after retransmission. At this time, the throughput of the system is improved, but the effective capacity of the system is not improved because the second video frame cannot be normally used by the user. Understandably, the difference between the MAC layer throughput and the effective capacity of the user side is called the effective capacity loss, which will usually cause waste of the MAC throughput.

[0062] In summary, different service services on the user side have different arrival rates and delay requirements. If the system precoding is designed based on optimization and capacity without considering the delay and integrity constraints corresponding to the service services, the system capacity will be easily wasted due to packet loss or timeout discard. Since the effective capacity is defined based on the characteristics of the service requirements on the user side, and the channel capacity is determined by the channel environment, optimizing the channel and capacity of the system to design the system precoding will cause the channel capacity to be mismatched with the effective capacity requirements on the user side, and further cause waste of network transmission resources and unfairness among users.

[0063] Therefore, the embodiments of the present application provide a service signal transmission method and related equipment. In the embodiments of the present application, the access network device determines the system precoding based on the effective capacity requirements corresponding to each user equipment, so that the channel capacity of each downlink channel meets the effective capacity requirements corresponding to each user equipment, so as to reasonably allocate the transmission resources of the wireless communication network, meet the service requirements of more user equipments, and further improve the effective capacity of the whole system.

[0064] Before introducing the embodiments of the present application, the system architecture of the embodiments of the present application is introduced:

[0065] Figure 2 A system architecture diagram of a wireless communication system provided by the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the wireless communication system includes an application side server, a core network, an access network, and user equipment. Figure 2

[0066] The application side server is a device for providing computing or application services. In the embodiments of the present application, the application side server is a server for providing real-time multimedia services. Specifically, the application side server needs to select the quality of service requirements of real-time multimedia services, and then sends the quality of service requirements to the core network through a related protocol.

[0067] ​The core network mainly completes three functions of registration, connection and session management. Specifically, the network exposure function module is used to expose the services and capabilities of the 3GPP network function to the application function (AF), and also allows the AF to provide information to the 3GPP network function. The policy and charging function module is used for policy management of charging policy and quality of service policy. The session management function module (SMF) is used to complete the session management functions of the user equipment (UE) IP address allocation, user plane function selection, charging and quality of service policy control, etc. The user plane function module (UPF) is used for specific data forwarding of the user plane, and generates an invoice based on traffic conditions, etc. In the embodiment of the present application, the core network can parse the application information field and determine the quality of service requirement of the real-time multimedia service of the access network device based on the GPRS tunneling protocol. In the case where the specific service requirement cannot be obtained, the data packets belonging to the same user equipment and the service experience feedback of the user equipment can be identified according to the packet characteristics and user feedback.

[0068] The access network is used to connect the user equipment to the core network. The access network device is connected to the user equipment. The access network device can be any kind of wireless transceiver device. Including but not limited to: evolved Node B (NodeB, eNB, e-NodeB or evolutional Node B) in LTE, base station (gNodeB or gNB) or transceiver point in NR, base station of subsequent evolution of 3GPP, access node in WiFi system, wireless relay node and wireless backhaul node, etc. Among them, the base station can be a macro base station, a micro base station, a pico base station, a small station, a relay station or a balloon station, etc., which is not limited. Multiple base stations can support the same technology network mentioned above, or different technology networks mentioned above. Among them, the base station can contain one or more co-sited or non-co-sited transceiver nodes. Specifically, the access network device can also be a wireless controller, a centralized unit and a distributed unit in a cloud radio access network scenario, and can also be a server, a wearable device, or a vehicle-mounted device, etc.

[0069] The following is described by taking a base station as an example. The plurality of access network devices can be base stations of the same type or base stations of different types. The base station can communicate with the terminal device or communicate with the terminal device through a relay station. The terminal device can communicate with a plurality of base stations of different technologies, for example, the terminal device can communicate with a base station supporting an LTE network, and can also communicate with a base station supporting a 5G network, and can also support dual connectivity with the base station of the LTE network and the base station of the 5G network. In the embodiments of the present application, the base station can calculate the multi-time slot precoding weight by obtaining the quality of service requirement of the real-time multimedia service.

[0070] A user equipment (UE), i.e., a terminal device, is a device with wireless transceiver function. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a VR device, an AR device, a wireless terminal in industrial control, a vehicle-mounted terminal, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart power grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable terminal device, etc., which are not limited in the embodiments of the present application. In the present application scenario, the user equipment needs to feed back the quality of service requirement to the base station or the application server after receiving the data packet of the real-time multimedia service.

[0071] Based on the above description, Figure 3 Another structure schematic diagram of a wireless communication system provided by the embodiments of the present application is provided. As shown in Figure 3 The precoding module of the physical layer is used to precode the downlink signal, and then send the preprocessed downlink signal to the user equipment. In the embodiments of the present application, the precoding module needs to determine the system precoding according to the quality of service requirement corresponding to the user equipment. For example, the precoding module can obtain the quality of service requirement corresponding to the user equipment from the packet header of the N3 interface by the predefined 5G QFI. For another example, the quality of service requirement corresponding to the user equipment is delivered to the core network by the media server providing the real-time multimedia service in the form of a flag bit, and then the core network informs the access network device, so that the precoding module obtains the quality of service requirement. For another example, the precoding module can also obtain the quality of service requirement corresponding to the user equipment from the service level agreement (SLA) manager in the network slice manager, which is not limited in the embodiments of the present application.

[0072] Based on the network architecture of the wireless communication network. Figure 4 A flowchart of a service signal sending method provided by the embodiments of the present application is provided. As shown in Figure 4 The sending method comprises the following steps:

[0073] 401、The access network device obtains the effective capacity requirement corresponding to the user equipment.

[0074] It can be understood that the wireless communication system includes a plurality of user equipments, and provides real-time multimedia services for the plurality of user equipments. Among them, the real-time multimedia service has very high real-time and integrity requirements for data transmission, that is, the transmitted real-time multimedia data is required to be transmitted to the user equipment completely under the time delay constraint condition, otherwise it will be discarded by the user equipment. In order to improve the effective capacity of the system, the access network device needs to allocate the transmission resources of the wireless communication network according to the data transmission requirements of each user equipment, so as to ensure that the data transmission of each user equipment meets the signal delay requirement and signal integrity requirement of the corresponding real-time multimedia service as much as possible.

[0075] It can be understood that the channel capacity of the downlink channel corresponding to the user equipment is related to the transmission quality of the downlink signal. The larger the channel capacity of the downlink channel, the shorter the time delay of the downlink signal transmitted in the downlink channel to the user equipment, and the higher the integrity. Therefore, the effective capacity requirement corresponding to the user equipment can be determined according to the data transmission requirement (i.e. real-time and integrity requirement) of the real-time multimedia service corresponding to the user equipment. Among them, the effective capacity requirement is used to indicate the data transmission rate of the channel that meets the signal delay requirement of the real-time multimedia service. Then the access network device allocates network transmission resources according to the effective capacity requirement corresponding to each user equipment, so that the wireless communication system can support more user equipments as much as possible.

[0076] The way in which the access network device obtains the effective capacity corresponding to the user equipment is described below:

[0077] 1) The user equipment reports the effective capacity requirement.

[0078] The user equipment can determine the effective capacity requirement according to the data transmission requirement of the real-time multimedia service corresponding to the user equipment. Then the effective capacity requirement is reported to the access network device. Among them, the user equipment estimates the effective capacity of the channel that can meet the above requirements based on the signal delay requirement and signal integrity requirement of the real-time multimedia service, and then determines the effective capacity requirement based on the estimated effective capacity. For example, the user equipment can estimate the effective capacity according to the data volume of the real-time multimedia service, the time delay constraint condition (the longest transmission time delay) and the signal integrity (the proportion of data with transmission errors in the total data volume), which is used to indicate the channel capacity that the channel at least needs to reach when meeting the above transmission conditions.

[0079] For example, after determining the effective capacity requirement, the user equipment can feed back the effective capacity requirement to the access network equipment by marking a certain effective capacity requirement identification bit of the packet header, or by feeding back information, without limitation.

[0080] 2) Application-side server feeds back the effective capacity requirement:

[0081] The application-side server is configured to provide real-time multimedia services, i.e., the real-time multimedia data to be transmitted is from the application-side server. Therefore, the application-side server can determine the effective capacity requirement according to the signal delay requirement and the signal integrity requirement corresponding to the real-time multimedia service, and then inform the core network through the packet header definition or specific QoS level selection, and then the core network informs the access network equipment. For example, the application-side server can feed back the effective capacity requirement to the access network equipment by marking the ECN flag bit, the SLA flag bit or the QFI flag bit.

[0082] 3) The access network equipment acquires the signal delay requirement and the signal integrity requirement corresponding to the real-time multimedia service of the user equipment, and determines the effective capacity requirement of the user equipment according to the signal delay requirement and the signal integrity requirement corresponding to the real-time multimedia service:

[0083] It can be understood that if the data transmission of the downlink channel meets the signal delay requirement and the signal integrity requirement of the service signal, the service signal can be normally used by the user equipment and will not be discarded. At this time, the service signal is an effective service signal for the user equipment. Therefore, the access network equipment can estimate the effective capacity of the channel that can meet the signal delay requirement and the signal integrity requirement corresponding to the real-time multimedia service, and then determine the effective capacity requirement of the user equipment based on the effective capacity. The effective capacity can be determined by the access network equipment according to the calculation formula. For example, in the case of block fading of the channel, for an independent service, the calculation formula of the effective capacity is:

[0084]

[0085] Wherein, C(θ) is the effective capacity, θ is the integrity requirement parameter, t is used to indicate the waiting time of data in the queue cache, and S[t] is used to indicate the queue length. is used to represent the mathematical expectation.

[0086] After the above formula is normalized, the effective capacity can also be written as:

[0087]

[0088] Wherein, B is used to represent normalized channel bandwidth, T is used to indicate signal delay requirement parameter (i.e. maximum delay), R is the instant rate of the current channel. It can be understood that the access network device can bring the relevant parameters into the above formula after obtaining the signal delay requirement and signal integrity requirement of the real-time multimedia service corresponding to the user equipment, estimate the effective capacity of the user equipment, i.e. obtain the channel capacity requirement of the user equipment. In some special cases, if the signal delay requirement parameter of the service is 0, i.e. the service requires that the service data must be transmitted immediately, then the effective capacity of the channel is determined as the current Shannon capacity of the channel. If the service has no delay constraint, i.e. the signal delay requirement parameter is infinite, then the effective capacity is determined as the delay limited capacity, i.e. the transmission rate that guarantees the queue length not to grow infinitely.

[0089] 4) The access network device determines the effective capacity requirement of the user equipment according to the historical transmission data of the user equipment:

[0090] The access network device can collect the historical scheduling strategy of each user equipment from the core network side to determine the historical data set of the user equipment, which records the corresponding relationship between the historical channel capacity and the historical data volume of the user equipment. Then, the access network device can perceive the feedback information of the user equipment, evaluate whether the historical channel capacity can meet the data transmission requirement of the user equipment according to the feedback of the user equipment, and adjust the scheduling strategy according to the evaluation result to determine the reasonable effective capacity requirement of the user equipment. For example, the user equipment feeds back the transmission result of a data transmission, including the delay, error rate, etc. of the data transmission. Then the access network device judges whether the historical channel capacity corresponding to the data transmission meets the data transmission requirement according to the feedback information, i.e. whether the delay or error rate of the data transmission result meets the real-time and integrity requirement of the data transmission, and then adjusts the strategy based on the judgment result, historical channel capacity, historical data volume and current service data volume to determine the effective capacity requirement of the user equipment, so as to guarantee the robustness of the system.

[0091] It can be understood that the mixed services can exist simultaneously in each user equipment, i.e. one user equipment can correspond to multiple service services (such as multiple real-time multimedia services). Each service service corresponds to a signal delay requirement and a signal integrity requirement. Then, when determining the effective capacity requirement corresponding to the user equipment, the effective capacity requirement of the user equipment can be determined according to the most stringent signal delay requirement and the signal integrity requirement in the mixed services. For example, a user equipment corresponds to service service A and service service B, the signal delay requirement of service service A is x seconds, i.e. the service data of service service A must be transmitted to the user equipment within x seconds, and the signal delay requirement of service service B is y seconds. The signal integrity requirement of service service A is 0.95, i.e. 5% of the data transmission error of service service A is allowed, and the signal integrity requirement of service service B is 0.98. Then, when determining the effective capacity requirement corresponding to the user equipment, the shortest signal delay requirement y seconds and the highest signal integrity requirement 0.98 are determined.

[0092] 402、The access network device determines the precoding corresponding to the downlink channel according to the effective capacity requirement.

[0093] The precoding is used to adjust the channel capacity of each downlink channel of the wireless communication system, so that the channel capacity of the downlink channel corresponding to each user equipment meets the effective capacity requirement thereof. Specifically, the access network device determines the system precoding based on the effective capacity requirement corresponding to each user equipment, so as to adjust the signal transmission power of the transmitting antenna and the antenna direction, thereby changing the channel capacity of the downlink channel. In this way, the channel capacity of the downlink channel corresponding to each user equipment is matched with the effective capacity requirement as much as possible, so that the waste of transmission resources is avoided, the quality of service service is improved, and the wireless communication network can support more user equipment, i.e. the effective capacity of the system is improved while the system throughput is guaranteed.

[0094] The process of determining the precoding by the access network is described in detail as follows:

[0095] For example, the optimization target of the system precoding is as follows:

[0096]

[0097]

[0098] Wherein, V is the precoding, k is used to indicate the number of user streams, i.e. the kth channel, K represents that the wireless communication system has K channels in total, ω k represents the weight coefficient of the kth channel. It can be understood that the coefficient determines the fairness among the user equipment in the system. k The effective capacity of the kth channel is Ck. And Θ is used to indicate the integrity requirement set of the K channels, and V indicates the precoding set of the K channels.

[0099] Among them, formula (3) is used to indicate that the optimization goal of system precoding is to maximize the sum of the effective capacities of K channels; and formula (4) is a signal power constraint condition, which is used to indicate that the sum of the signal transmission powers corresponding to the K channels must be less than the normalized power threshold.

[0100] Next, based on the above effective capacity formula and Shannon's law, C k After representation, the optimization objectives of system precoding are as follows:

[0101]

[0102] Where H indicates the channel quality matrix and V is the precoding matrix. k is the constant term coefficient corresponding to the kth channel, and its value is And I is the identity matrix, is the identity matrix corresponding to the number of flows of k users. It can be understood that N k It is used to indicate the dimension of the identity matrix. SNR is used to indicate the signal-to-noise ratio corresponding to the kth channel.

[0103] Next, for formula (5), after taking the derivative of the transmission weight and setting it to zero, we can get:

[0104]

[0105] in,

[0106]

[0107] and

[0108]

[0109]

[0110] Here, Tr is used to indicate the trace of the matrix.

[0111] Based on the above formula, the precoding matrix V can be obtained through iteration. Figure 5 This is a flowchart of the iterative algorithm of the precoding matrix V provided in the embodiment of the present application. As shown in Figure X, first, it is necessary to initialize so that m is 0, V0 = V ZF Among them, V ZF is the zero-forcing precoding matrix. Next, add 1 to m, that is, m=m+1, and then use V m-1 calculate and Then get the previous step and Substituting into formula (4), we get Then Normalize the power to get V m Then judge V m and V m-1 Is the difference less than the preset threshold ∈? If it is greater than, then return to the loop to execute the above steps. If it is less than or equal to, then output V is V m V = V m

[0112] For example, the wireless communication system may also constrain the signal power of each antenna. The above power constraint condition (shown in formula (4)) may also be:

[0113]

[0114] As can be understood, the above formula (7) indicates that if the signal transmission power corresponding to the rth antenna is greater than the preset power threshold, the signal transmission power needs to be constrained. However, constraining the power of a single antenna is more in line with the physical characteristics of wireless communication systems. Since the power of each antenna is within the optimal operating range of its amplifier, there is no need to trim the precoding matrix, avoiding the destruction of orthogonality between channels. As a result, each channel can achieve a higher data transmission rate, and the system performance is also better.

[0115] Understandably, in extreme cases, some real-time multimedia services do not allow any packets to violate queue delay constraints. This can cause the user's channel capacity demand to approach infinity, making it impossible for the system to allocate network transmission resources. Therefore, access network equipment needs to impose certain restrictions on the channel capacity demand of each user device based on the channel and user information corresponding to the user device. Similarly, if the delay constraints of certain services are very loose, the system will also be unable to reasonably allocate network transmission resources. Therefore, access network equipment needs to limit the channel capacity demand of each user device based on its own service capacity limit, neither too small nor too large.

[0116] The channel capacity requirements of user equipment (UEs) can also serve as a reference for uplink signal transmission in wireless communication systems. Access network equipment can allocate uplink transmission resources to each UE based on the UE's channel capacity requirements, ensuring service guarantees for each UE's uplink applications while conserving energy.

[0117] 403. The access network device preprocesses the service signal according to the precoding, and sends the preprocessed service signal to the user equipment through a downlink channel.

[0118] After the access network device determines the downlink precoding, the access network device pre-processes the service signal according to the downlink precoding, and then sends the pre-processed service signal to the user equipment through the downlink channel. It can be understood that the downlink precoding is determined according to the effective capacity requirement corresponding to each user equipment, so that the channel capacity of the downlink channel matches the effective capacity requirement of the user equipment, so that the downlink channel meets the quality of service while not wasting network transmission resources, so that the wireless communication system can support more user equipment and greatly improve the effective capacity of the system while ensuring the system throughput.

[0119] It can be understood that the user equipment can also feed back the quality of service evaluation for the service to the access network device after receiving the service signal. For example, the user equipment can send feedback information to the access network device, including but not limited to time delay state information, transmission error rate information, and data volume information of the received service signal. After receiving the feedback information, the access network device can perceive the satisfaction degree of the user for the service based on the information, and then dynamically adjust the real effective capacity requirement of the user equipment based on the evaluation of the user, so as to reasonably allocate network transmission resources as much as possible and further improve the performance of the system.

[0120] Based on the above description, the embodiment of the present application also provides an access device. In the embodiment of the present application, the access device can be divided into functional modules according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the embodiment of the present application is illustrative, and is only a logical function division. In actual implementation, another division mode can be used.

[0121] In the case of dividing each functional module according to each function, Figure 6 A possible structure schematic diagram of the access device involved in the above embodiment is shown. As shown in the figure, Figure 6 The access device is applied to wireless network communication. The wireless network communication includes the access device and the user equipment, and the access device and the user equipment communicate through the wireless network. The user equipment includes:

[0122] The acquisition unit 601 is configured to acquire the effective capacity requirement corresponding to the user equipment. The effective capacity is used to indicate the transmission rate of the channel that meets the data transmission requirement of the service, and the data transmission requirement includes the signal time delay requirement.

[0123] The determining unit 602 is configured to determine a precoding corresponding to the downlink channel according to the effective capacity requirement, the precoding being used to adjust a channel capacity of the downlink channel so that the channel capacity of the downlink channel meets the effective capacity requirement.

[0124] The processing unit 603 is configured to pre-process a service signal corresponding to the service service according to the precoding.

[0125] The transceiver unit 604 is configured to send the pre-processed service signal to the user equipment through the downlink channel.

[0126] In an optional implementation, the user equipment corresponds to N service services, and N is a natural number greater than or equal to 1. The data transmission requirement further includes a signal integrity requirement.

[0127] In an optional implementation, N is a natural number greater than 1, wherein the N service services correspond to N signal delay requirements and N signal integrity requirements.

[0128] The effective capacity requirement is determined according to a shortest signal delay requirement in the N signal delay requirements and a highest signal integrity requirement in the N signal integrity requirements.

[0129] In an optional implementation, the obtaining unit 601 is specifically configured to obtain an effective capacity requirement identifier fed back by the user equipment. The effective capacity requirement identifier is determined by the user equipment based on the shortest signal delay requirement and the highest signal integrity requirement.

[0130] The determining unit 602 is further configured to identify the effective capacity requirement identifier to determine the effective capacity requirement.

[0131] In an optional implementation, the obtaining unit 601 is specifically configured to obtain the shortest signal delay requirement and the highest signal integrity requirement.

[0132] The determining unit 602 is further configured to calculate an effective capacity according to the shortest signal delay requirement and the highest signal integrity requirement, and determine the effective capacity requirement according to the effective capacity.

[0133] In an optional implementation, the transceiver unit 604 is further configured to receive feedback information sent by the user equipment, the feedback information including delay state information, transmission error rate information and data volume information of the service signal.

[0134] The determining unit 502 is further configured to adjust the effective capacity requirement corresponding to the user equipment according to the feedback information.

[0135] In an optional implementation, the pre-coding is used to adjust the signal transmission power and direction of the transmission antenna corresponding to the downlink channel. The signal transmission power and direction of the transmission antenna are related to the channel capacity of the downlink channel, and the signal transmission power of the transmission antenna is less than a preset power threshold.

[0136] Figure 7 Figure 1 is a schematic diagram of an access network device according to an embodiment of the present application. The access network device 1800 can include one or more central processing units (CPUs) 1801 and a memory 1805 in which one or more application programs or data are stored.

[0137] The memory 1805 can be volatile memory or persistent storage. The programs stored in the memory 1805 can include one or more modules, each of which can include a series of instruction operations in the management server. Further, the central processing unit 1801 can be configured to communicate with the memory 1805 to execute the series of instruction operations in the memory 1805 on the access network device 1800.

[0138] The central processing unit 1801 is configured to execute the computer programs in the memory 1805, so that the access network device 1800 is configured to perform the following operations: the access network device obtains the effective capacity requirement corresponding to the user equipment, the effective capacity being used to indicate the data transmission rate of the channel satisfying the data transmission requirement of the service, and the data transmission requirement including the signal delay requirement. The access network device determines the pre-coding corresponding to the downlink channel according to the effective capacity requirement, the pre-coding being used to adjust the channel capacity of the downlink channel so that the channel capacity of the downlink channel satisfies the effective capacity requirement. The access network device pre-processes the service signal corresponding to the service according to the pre-coding, and transmits the pre-processed service signal to the user equipment through the downlink channel. For specific implementation, please refer to the steps performed by the access network device in the embodiments shown in Figure 4 The access network device performs the steps in the embodiments shown in the above, which will not be described here.

[0139] The access network device 1800 can further include one or more power supplies 1802, one or more wired or wireless network interfaces 1803, one or more input / output interfaces 1804, and / or one or more operating systems, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

[0140] The embodiments of the present application also provide a computer readable storage medium, which stores at least one computer program instruction, the computer program instruction is loaded and executed by a processor to implement the above-mentioned Figure 4The method for sending a service signal performed by the access network device in any of the embodiments is not described herein again.

[0141] The embodiments of the present application further provide a computer program product, which comprises computer execution instructions. When the computer execution instructions run on a computer, the computer execution instructions make the computer execute the method described above. Figure 4 The method for sending a service signal performed by the access network device in any of the embodiments.

[0142] The embodiments of the present application further provide a wireless communication system, which comprises an access network device and a user equipment. The access network device and the user equipment communicate through a wireless network. The access network device is, for example, the access device shown in Figure 5 The method for sending a service signal performed by the access network device in any of the embodiments is not described herein again.

[0143] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes (or functions) described in the embodiments of the present application are implemented. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or data storage device comprising one or more servers, data centers, etc. integrated with the medium. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)) and the like. In the embodiments of the present application, the computer can comprise the device described above.

[0144] Although the application has been described in connection with various embodiments, it will be understood that the application is capable of further modifications. These modifications will be apparent to those skilled in the art taking into account the disclosure and the appended claims. In the claims, the term "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. A single processor or other unit can fulfil the functions of several items recited in the claims. The terms "first", "second" and the like do not imply any ordering, but rather are used as namers. The terms "comprise", "comprising", "include", "including" and the like are used herein to mean including at least the recited item, but not to the exclusion of other items.

Claims

1. A transmission method of a service signal, characterized by, The method comprises: The access network device acquires the effective capacity requirement corresponding to the user equipment; the effective capacity is used to indicate the data transmission rate of the channel satisfying the data transmission requirement of the service, and the data transmission requirement comprises the signal delay requirement; The access network device determines the precoding corresponding to the downlink channel according to the effective capacity requirement; the precoding is used to adjust the channel capacity of the downlink channel, so that the channel capacity of the downlink channel satisfies the effective capacity requirement; The access network device preprocesses the service signal corresponding to the service according to the precoding, and transmits the preprocessed service signal to the user equipment through the downlink channel.

2. The transmission method of claim 1, wherein, The user equipment corresponds to N service, and N is a natural number greater than or equal to 1; the data transmission requirement further comprises the signal integrity requirement.

3. The transmission method of claim 2, wherein, The N is a natural number greater than 1, wherein the N services correspond to N signal delay requirements and N signal integrity requirements; The effective capacity requirement is determined according to the shortest signal delay requirement in the N signal delay requirements and the highest signal integrity requirement in the N signal integrity requirements.

4. The transmission method of claim 3, wherein, The access network device acquires the effective capacity requirement corresponding to the user equipment, comprising: The access network device acquires the effective capacity requirement identifier fed back by the user equipment; the effective capacity requirement identifier is determined by the user equipment based on the shortest signal delay requirement and the highest signal integrity requirement; The access network device identifies the effective capacity requirement identifier to determine the effective capacity requirement.

5. The transmission method of claim 3, wherein, The access network device acquires the effective capacity requirement corresponding to the user equipment, comprising: The access network device acquires the shortest signal delay requirement and the highest signal integrity requirement; The access network calculates the effective capacity according to the shortest signal delay requirement and the highest signal integrity requirement, and determines the effective capacity requirement according to the effective capacity.

6. The transmission method according to any one of claims 1 to 5, characterized in that, The method further comprises: The access network device receives the feedback information transmitted by the user equipment; the feedback information comprises the delay state information, the transmission error rate information and the data volume information of the service signal; The access network device adjusts the effective capacity requirement corresponding to the user equipment according to the feedback information.

7. The transmission method according to any one of claims 1 to 6, characterized in that, The precoding is used to adjust the signal transmission power and direction of the transmission antenna corresponding to the downlink channel; the signal transmission power and direction of the transmission antenna are related to the channel capacity of the downlink channel, and the signal transmission power of the transmission antenna is less than the preset power threshold.

8. An access device, comprising: The access device comprises: The acquisition unit is used to acquire the effective capacity requirement corresponding to the user equipment; the effective capacity is used to indicate the transmission rate of the channel satisfying the data transmission requirement of the service, and the data transmission requirement comprises the signal delay requirement; The determination unit is used to determine the precoding corresponding to the downlink channel according to the effective capacity requirement; the precoding is used to adjust the channel capacity of the downlink channel, so that the channel capacity of the downlink channel satisfies the effective capacity requirement; The processing unit is used to preprocess the service signal corresponding to the service according to the precoding; a transceiver unit, configured to send the pre-processed service signal to the user equipment through the downlink channel.

9. The access device of claim 8, wherein, The user equipment corresponds to N service services, and N is a natural number greater than or equal to 1; the data transmission requirement further includes a signal integrity requirement.

10. The access device of claim 9, wherein, N is a natural number greater than 1, wherein the N service services correspond to N signal delay requirements and N signal integrity requirements. The effective capacity requirement is determined according to the shortest signal delay requirement in the N signal delay requirements and the highest signal integrity requirement in the N signal integrity requirements.

11. The access device of claim 10, wherein The acquisition unit is specifically configured to acquire an effective capacity requirement identifier fed back by the user equipment; and the effective capacity requirement identifier is determined by the user equipment based on the shortest signal delay requirement and the highest signal integrity requirement. The determination unit is further configured to identify the effective capacity requirement identifier to determine the effective capacity requirement.

12. The access device of claim 10, wherein The acquisition unit is specifically configured to acquire the shortest signal delay requirement and the highest signal integrity requirement. The determination unit is further configured to calculate the effective capacity according to the shortest signal delay requirement and the highest signal integrity requirement, and determine the effective capacity requirement according to the effective capacity.

13. The access device of any one of claims 9 to 12, wherein The transceiver unit is further configured to receive feedback information sent by the user equipment; the feedback information includes delay state information, transmission error rate information and data volume information of the service signal. The determination unit is further configured to adjust the effective capacity requirement corresponding to the user equipment according to the feedback information.

14. The access device of any of claims 9 to 13, wherein, The precoding is used to adjust the signal transmission power and direction of the transmission antenna corresponding to the downlink channel; the signal transmission power and direction of the transmission antenna are related to the channel capacity of the downlink channel, and the signal transmission power of the transmission antenna is less than a preset power threshold.

15. An access network device, comprising: The access network device includes a processor and a memory; the processor is coupled with the memory; the memory is used to store computer instructions, which are loaded and executed by the processor to enable the access network device to implement the service signal sending method of any one of claims 1 to 7.

16. A computer readable storage medium having stored thereon computer instructions, wherein, including: Computer instructions, wherein the computer instructions, when executed, cause the computer to perform the method of the service signal according to any one of claims 1 to 7.

17. A wireless communication system, characterized by The wireless communication system includes an access network device and a user equipment; wherein the access network device performs the service signal sending method of any one of claims 1 to 7 to send the service signal to the user equipment through the wireless communication network.

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