JP2020512738A - Adaptive transmission method and apparatus - Google Patents

Abstract

Embodiments of the present invention provide an adaptive transmission method and apparatus, and relate to the field of data transmission technology. The adaptive transmission method is a step of obtaining a first uplink transmission rate and a second uplink transmission rate of a terminal, the first uplink transmission rate being an available uplink transmission rate, and a second uplink transmission rate. The uplink transmission rate of is the uplink transmission rate required for transmission of the service, the step of obtaining and the adaptive transmission policy if the first uplink transmission rate is less than the second uplink transmission rate. In the determining step, the adaptive transmission policy is used to instruct the terminal to reduce the size of the uplink acknowledgment data packet transmitted in the unit period, so that the first uplink transmission rate is Can meet the downlink transmission rate requirement, according to the deciding step and the adaptive transmission policy, peer end And a step of transmitting the data. Thus, the problem of the prior art that the downlink throughput is relatively low due to the relatively low uplink transmission rate is solved, and the downlink throughput is improved because data can be adaptively transmitted according to the adaptive transmission policy. ..

Description

  The embodiments of the present application relate to the technical field of data transmission, and more particularly to an adaptive transmission method and apparatus.

  A low-latency Internet transfer protocol based on Transfer Control Protocol (TCP) and User Datagram Protocol (UDP) (Quick UDP Internet Connection, QUIC) is a reliable connection-oriented transport layer communication. It is a protocol. When sending data packets to ensure that packet loss does not occur, the sending end assigns a sequence number to each data packet, and the receiving end receives the corresponding positive acknowledgment for successfully received data packets. A response signal (ACKNOWLEDGEMENT, ACK) is returned. For TCP-based services or QUIC-based services, the service rate is determined based on both downlink data transmission rate and uplink acknowledgment transmission rate.

  Usually, in wireless networks, downlink transmission rate is relatively high and uplink transmission is a bottleneck. Therefore, in the existing solution, the downlink throughput may be relatively low due to the limited uplink transmission rate.

  To solve the problem of the prior art that downlink throughput is low due to low uplink transmission rate, embodiments of the present invention provide an adaptive transmission method and apparatus. The technical solution is as follows.

  According to the first aspect, an adaptive transmission method is provided, which may be applied to a terminal or a network side device.

  The method includes obtaining a first uplink transmission rate available to the terminal and a second uplink transmission rate required for transmission of the service. If the first uplink transmission rate is less than the second uplink transmission rate, it indicates that the requirement cannot be met in the uplink. In this case, the adaptive transmission policy is determined and the data may be transmitted to the peer end according to the adaptive transmission policy. The adaptive transmission policy is used to instruct the terminal to reduce the size of the uplink acknowledgment data packets sent in the unit time period so that the service's uplink acknowledgment data packets are When transmitted at a rate below the transmission rate, downlink data packets of the service may be transmitted at a rate above the downlink transmission rate.

  When the first uplink transmission rate is lower than the second uplink transmission rate, the adaptive transmission policy is determined, and the data is transmitted to the peer end by the adaptive transmission policy, so that the uplink transmission rate in the related art is relatively low. The problem of relatively low downlink throughput due to the low is eliminated and the size of the uplink acknowledgment data packet is reduced to reduce the time used to send the uplink acknowledgment data packet that needs to be sent. Can be reduced. Thereby, the normal uplink transmission is guaranteed when the first uplink transmission rate is relatively low, and the downlink throughput is improved.

  In a first possible implementation, the step of obtaining a first uplink transmission rate comprises the steps of: if the method is applied to the terminal, the terminal obtaining an uplink rate calculation parameter; Determining a first uplink transmission rate based on, or, if the method is applied to a network-side device, receiving a first uplink transmission rate transmitted by a terminal. The first uplink transmission rate transmitted by the terminal is the rate calculated and transmitted by the terminal based on the uplink rate calculation parameter. The uplink rate calculation parameters are the past uplink transmission rate of the terminal, the channel quality information of the terminal, the service information of the terminal, the quality of service (QoS) information of the terminal, and the uplink transmitted by the network side device. At least one of the available transmission rates is included. The past uplink transmission rate is the uplink transmission rate ever supported by the terminal.

  In a second possible implementation, the steps of obtaining a second uplink transmission rate include obtaining a downlink transmission rate and calculating a second uplink transmission rate based on the downlink transmission rate. May be included.

  Obtaining the downlink transmission rate may include the following implementation. In the first implementation, when the method is applied to a terminal, a downlink transmission rate transmitted by a network side device is received, or a downlink rate calculation parameter transmitted by a network side device is received, The downlink transmission rate is calculated based on the downlink rate calculation parameter. In the second implementation, the downlink transmission rate is calculated based on the downlink rate calculation parameter when the method is applied to the network side device.

  During the actual implementation, the service requirement of the terminal is further obtained, and the second uplink transmission rate may be calculated based on the downlink transmission rate and the service requirement. The service request may include at least one of service type and service context information.

  The step of obtaining the service request of the terminal includes the step of directly obtaining the service request by the terminal when the method is applied to the terminal, or the step of obtaining the service request of the network by the terminal when the method is applied to the network side device. The receiving device may include the step of receiving.

  In a third possible implementation, the step of determining the adaptive transmission policy may include at least one of the following three possible implementations.

  In a first possible implementation, the target data packet format of the uplink acknowledgment data packet is determined. The size of the uplink acknowledgment data packet in the target data packet format is smaller than the size of the uplink acknowledgment data packet in the initial data packet format. The time when the target data packet format is determined is the first time, and the initial data packet format is the data packet format used when the uplink acknowledgment data packet needs to be sent at the first time. .

  In a second possible implementation, the transmission opportunity for uplink acknowledgment data packets is determined. The transmission opportunity is returning an uplink acknowledgment data packet after M downlink data packets have been received, M is an integer greater than N, and the time when the transmission opportunity is determined is the second time. Yes, N is the number of downlink data packets received if the uplink acknowledgment data packet needs to be transmitted at the second time point.

  In a third possible implementation, if the network-side device does not enable the Forward Error Correction (FEC) mechanism for downlink data transmission, the first command information is generated or the downlink is generated. A first size of FEC group for data transmission is calculated. The first command information is used to command to enable the FEC mechanism for downlink data transmission, and when the network-side device has enabled FEC for downlink data transmission, the FEC group for downlink data transmission is defined. The second size is calculated. The second size is smaller than the original size of the FEC group, the original size being the size of the FEC group used in the FEC mechanism for downlink data transmission enabled by the network side device.

  The target data packet format is determined such that the size of the encapsulated uplink acknowledgment data packet is smaller than the size of the encapsulated data packet in the initial data packet format. Therefore, the amount of data that needs to be uploaded by the terminal is reduced, and it is still guaranteed that the uplink rate and the downlink rate match if the first uplink transmission rate is less than the second uplink transmission rate. Can be done. Thereby, downlink transmission throughput is guaranteed.

  The transmission opportunity is determined, and after the M downlink data packets are received, the uplink acknowledgment data packet is transmitted to the network side device. As such, the number of uplink acknowledgment data packets that need to be transmitted is reduced. In other words, the uplink rate and the downlink rate are guaranteed to match, which guarantees the downlink transmission throughput.

  If the network-side device does not enable the FEC mechanism for downlink data transmission, the first command information is generated or the first size is calculated. Thereby, by ensuring the accuracy of the downlink data packets received by the terminal, the number of uplink acknowledgment data packets that need to be uploaded is reduced and downlink transmission throughput is guaranteed. Similarly, if the network side device has enabled the FEC mechanism for downlink data transmission, a second size of FEC group for downlink data transmission is calculated. Thereby, by ensuring the accuracy of the downlink data packets received by the terminal, the number of uplink acknowledgment data packets that need to be uploaded is reduced and downlink transmission throughput is guaranteed.

  In the above method, determining the target data packet format of the uplink acknowledgment data packet includes calculating a difference between the second uplink transmission rate and the first uplink transmission rate, and calculating the difference. Obtaining a corresponding target data packet format, wherein the larger the uplink acknowledgment data packet in the target data packet format, the smaller the difference.

  Determining the transmission opportunity of the uplink acknowledgment data packet includes calculating a difference between the second uplink transmission rate and the first uplink transmission rate, and obtaining a value of M corresponding to the difference. And a step of acquiring, in which the difference increases as the value of M increases.

  The step of calculating the second size of the FEC group for the downlink data transmission includes the step of calculating the difference between the second uplink transmission rate and the first uplink transmission rate, and the second step corresponding to the difference. The step of acquiring the second size, and the step of acquiring, in which the difference corresponding to the second size decreases as the value of the second size increases.

  In a fourth possible implementation, if the above method is applied to the terminal, the step of transmitting the data to the peer end according to the adaptive transmission policy comprises the adaptive transmission policy having a target data packet format of the uplink acknowledgment data packet. Sending an uplink acknowledgment data packet to a network side device based on the target data packet format, if the adaptive transmission policy has an opportunity to send the uplink acknowledgment data packet, the network based on the sending opportunity Transmitting an uplink acknowledgment data packet to the device on the network side, transmitting the first command information to the device on the network side if the adaptive transmission policy has the first command information, and transmitting the first command information. After receiving, The first command information is used for instructing to enable the FEC mechanism for downlink data transmission, the transmitting step, the adaptive transmission policy, and the forward error correction FEC mechanism for downlink data transmission. Has a first size, the step of sending the first size to the network side device, after receiving the first size, the network side device enables the FEC mechanism for downlink data transmission, And transmitting a downlink data packet to the terminal based on the first size, the first size being a size of a pre-generated FEC group for the downlink data transmission, the transmitting step, or the adaptive transmission policy being the first. If you have a size of 2, give the network-side device a second size In the transmitting step, after receiving the second size, the network-side device sends a downlink data packet to the terminal based on the second size, the second size being for downlink data transmission. Includes transmitting, which is the size of the pre-generated FEC group.

  When the method is applied to a network-side device, the step of transmitting data to the peer end according to the adaptive transmission policy includes the adaptive transmission policy is a target data packet format of the uplink acknowledgment data packet, and / or the uplink acknowledgment data packet. Sending a target data packet format and / or a transmission opportunity to the terminal and receiving an uplink acknowledgment data packet transmitted by the terminal based on the target data packet format and / or the transmission opportunity, When the adaptive transmission policy has the first command information, enabling the FEC mechanism for the downlink data transmission, the first command information enabling the FEC mechanism for the downlink data transmission. Enabling step, if the adaptive transmission policy has a first size, enabling the FEC mechanism for downlink data transmission, and based on the first size, the downlink data packet to the terminal. In the first size is a size of a pre-generated FEC group for downlink data transmission, or a second size if the adaptive transmission policy has a second size. Based on the above, transmitting the downlink data packet to the terminal, the second size includes transmitting, which is the size of the pre-generated FEC group for the downlink data transmission.

  According to a second aspect, an adaptive transmission device is provided. The adaptive transmission device includes a processor and a transmitter connected to the processor. The processor is configured to execute the instruction, and the processor implements the adaptive transmission method in the first aspect by executing the instruction.

  According to a third aspect, an adaptive transmission device is provided. The adaptive transmission device comprises at least one unit, the at least one unit being configured to implement the adaptive transmission method provided in the first aspect.

It is a schematic diagram of a mounting environment concerning an embodiment of the present invention.

6 is a flowchart of an adaptive transmission method according to an exemplary embodiment of the present invention.

FIG. 6 is a schematic diagram of a possible structure of an uplink acknowledgment data packet in TCP according to an embodiment of the present invention.

6 is a flowchart of an adaptive transmission method according to an exemplary embodiment of the present invention.

1 is a schematic structural diagram of an adaptive transmission apparatus according to an exemplary embodiment of the present invention.

1 is a schematic structural diagram of an adaptive transmission apparatus according to an exemplary embodiment of the present invention.

  References herein to "first," "second," etc. do not indicate any order, number, or importance, and are only used to distinguish different components. Similarly, "a", "one" and the like are not intended to be limiting in number but are meant to be indicative of at least one. “Connection”, “link”, etc. are not limited to physical or mechanical connection, but may include electrical connection regardless of direct link or indirect link.

  A "module" as referred to herein is typically a program or instruction stored in memory and capable of implementing some functionality. A "unit" as referred to herein is a functional structure that is typically divided according to logic. A "unit" may be implemented in hardware only, or in a combination of software and hardware.

  As used herein, "plurality" means two or more than two. “And / or” describes a relationship between related objects and indicates that there may be three relationships. For example, A and / or B may represent the following three situations: only A exists, both A and B exist, only B exists. The symbol "/" generally indicates an "or" relationship between related objects.

  FIG. 1 is a schematic diagram of an implementation environment involved in an adaptive transmission method according to an embodiment of the present invention. As shown in FIG. 1, the implementation environment may include a terminal 110 and a network-side device 120.

  Terminal 110 is a mobile terminal, such as a mobile phone (also referred to as a “cellular” telephone) or a computer having a mobile terminal, such as a portable, pocket-sized, handheld, self-contained, or on-board mobile device. You may It is not limited to this. In another example, the terminal 110 may be a subscriber unit, a subscriber station, a mobile station, a mobile console, a mobile station, a remote station, or a remote station. Point (Access Point, AP), remote terminal (Remote Terminal), access terminal (Access Terminal, AT), user equipment (User Terminal, UT), user agent (User Agent, UA), terminal (User Device), subscriber On-premises equipment (Customer Premieres Equipment, CPE) or user terminal (User) Equipment, UE). Optionally, the terminal 110 may be a relay. This embodiment does not limit this.

  During actual implementation, the terminal 110 may establish a wireless connection to the network-side device 120 using a wireless air interface and send uplink data to the network-side device 120 through the wireless connection. The wireless air interface may be a wireless air interface at any frequency based on 4G and 5G standards. For example, the wireless air interface is a new radio (New Radio, NR) air interface. Alternatively, the wireless air interface may be a 5G-based wireless air interface based on the next generation mobile communication network technology standard. Optionally, the wireless air interface may be a Wireless Fidelity (WiFi) air interface.

  In addition, for edge users at the cell edge, the uplink transmission rate of the edge user usually cannot meet the downlink transmission requirements due to the relatively poor network coverage at the cell edge. Therefore, the terminal 110 described in the following embodiments may be an edge user at the cell edge. This embodiment does not limit this.

  The network side device 120 may be an access network (Radio Access Network, RAN) device, a core network device, a service server, or any relay device in a service data transmission process. The relay device may be a UE. It is not limited to this. In addition, during the actual implementation, the network-side device 120 may be further divided into two logical functional entities, a control plane and a user plane, and the functions of the network-side device described in the embodiments below are controlled. It may be implemented by a plane or a user plane. It is not limited to this.

  The data packet exchanged between the terminal 110 and the network-side device 120 may be a data packet encapsulated based on the TCP or QUIC protocol. Alternatively, optionally, the data packet exchanged between terminal 110 and network-side device 120 may be a data packet encapsulated according to another transport or application layer protocol, where the protocol is It is a feedback-based protocol. This embodiment does not limit this.

  The adaptive transmission method provided in the following embodiments may be applied to the terminal 110 shown in FIG. 1 or may be applied to the network side device 120 shown in FIG. These embodiments do not limit this. In the following embodiments, the uplink means a route from the terminal to the network side device, and the downlink means a route from the network side device to the terminal. It is not limited to this. In addition, in the following embodiments, the terminal 110 functions as a receiving end of the downlink data packet and has a function of transmitting the uplink feedback information of the downlink data packet.

  FIG. 2 is a method flowchart of an adaptive transmission method according to an embodiment of the present invention. This embodiment will be described using an example in which the adaptive transmission method is applied to the terminal 110 shown in FIG. As shown in FIG. 2, the adaptive transmission method includes the following steps.

  Step 201. Obtaining an uplink rate calculation parameter and determining a first uplink transmission rate based on the uplink rate calculation parameter.

  The uplink rate calculation parameters are the past uplink transmission rate of the terminal, the channel quality information of the terminal, the service information of the terminal, the quality of service (QoS) information of the terminal, and the uplink transmitted by the network side device. At least one of the available transmission rates is included. The past uplink transmission rate is the uplink transmission rate ever supported by the terminal. For example, the past uplink transmission rate is calculated by the terminal based on the past period.

  The first uplink transmission rate is an uplink transmission rate available to the terminal.

  For example, the uplink rate calculation parameter includes a past uplink transmission rate. The terminal calculates the first uplink transmission rate based on the past uplink transmission rates. For example, the terminal may directly use the past uplink transmission rate as the first uplink transmission rate.

  For example, the uplink rate calculation parameter includes the past uplink transmission rate and channel quality information of the terminal. The terminal performs a weighted calculation on the past uplink transmission rate and the channel quality information of the terminal to obtain the first uplink transmission rate.

  Optionally, the uplink rate calculation parameter may further include a guaranteed bit rate transmitted by the network side device. In this case, this step may include the step of determining the received guaranteed bit rate as the first uplink transmission rate.

  Step 202. Get the downlink transmission rate.

  The terminal may obtain the downlink transmission rate in the following three possible implementations.

  In a first possible implementation, the terminal receives the downlink transmission rate sent by the network-side device. The downlink transmission rate sent by the network side device is the rate calculated and transmitted by the network side device based on the downlink rate calculation parameter. The downlink rate calculation parameter includes at least one of target information, a guaranteed rate of the downlink service, and bit rate information of the downlink service. The target information includes a downlink service data amount and a downlink service transmission period.

  The network-side device calculates the downlink transmission rate based on the downlink rate calculation parameter, the downlink transmission rate determines the downlink service data amount when the downlink rate calculation parameter includes target information. If the downlink rate calculation parameter includes the guaranteed rate of the downlink service, the downlink transmission rate is equal to the guaranteed rate of the downlink service, or the downlink rate calculation parameter is down. When including the link service bit rate information, the downlink transmission rate is equal to the downlink service bit rate multiplied by k, where k is a constant, typically 1.2 or 1.3, which is a limitation. What is done And a Ikoto.

  The downlink transmission rate may be a rate which is periodically acquired and transmitted to the terminal before the network side device transmits the downlink data packet, or obtained in the process in which the network side device transmits the downlink data packet. It should be noted that it may be the rate at which it is sent to the terminal. It is not limited to this.

  In a second possible implementation, the terminal receives a downlink rate calculation parameter sent by the network-side device and calculates a downlink transmission rate based on the downlink rate calculation parameter. Downlink rate calculation parameters are described in the first possible implementation. Details will not be repeated here. The calculation method by which the terminal calculates the downlink transmission rate based on the downlink rate calculation parameter is the same as the calculation method by which the network side device calculates the downlink transmission rate based on the downlink rate calculation parameter. Details will not be repeated here.

  In a third possible implementation, the terminal calculates the downlink transmission rate based on the downlink data reception status.

  Optionally, the terminal obtains the size of the downlink data packet received and the period used to receive the downlink data packet, calculates the ratio of the obtained size to the obtained period, and calculates The ratio may be used as the downlink transmission rate.

  It should be noted that only the example in which the terminal acquires the downlink transmission rate in the acquisition scheme described above is used above. Optionally, the terminal may obtain the downlink transmission rate with another acquisition scheme. It is not limited to this.

  Step 203. A second uplink transmission rate is calculated based on the downlink transmission rate.

  The second uplink transmission rate is calculated based on the downlink transmission rate and the relationship between the downlink transmission rate and the uplink transmission rate. The relationship between the downlink transmission rate and the uplink transmission rate is the relationship between the size of the downlink data packet, the size of the uplink acknowledgment data packet, the number of uplink acknowledgment data packets and the number of downlink data packets. Can be obtained through conversion based on the correspondence relationship of

  TCP is used as an example. When two downlink data packets correspond to one uplink acknowledgment data packet, the maximum size of the downlink data packet is 1500 bytes, and when the size of the uplink acknowledgment data packet is 40 bytes, the uplink data The difference between the amount and the downlink data amount is (1500 × 2) / 40 = 75 times. If the difference between the amount of uplink data and the amount of downlink data is converted into a rate difference, the downlink transmission rate is 75 times greater than the uplink transmission rate. In other words, the second uplink transmission rate is equal to the downlink transmission rate divided by 75.

  Optionally, the terminal may further obtain the service requirement of the terminal and calculate a second uplink transmission rate based on the downlink transmission rate and the service requirement. The service request may include at least one of service type and service context information.

  If the downlink service is a hybrid service, it is inaccurate to obtain the second uplink transmission rate based on the relationship between the downlink transmission rate and the uplink transmission rate. In this case, the downlink transmission rates of the various services need to be further distinguished. Therefore, the second uplink transmission rate needs to be obtained based on the downlink transmission rate of the service of the service type and the service type. Specifically, when calculating a specific downlink transmission rate, the terminal individually collects statistics about downlink data packets of various service types, obtains the downlink transmission rate of the service, and collects the second transmission rate of the service. Get the uplink transmission rate.

  During the actual implementation, steps 201 to 203 include transport layer, network layer, physical layer, media access control (MAC) layer, radio link control (RLC) protocol layer, or packet. It may be performed by any entity in the Data Convergence Protocol (PDCP) layer.

  It should be further noted that steps 201 to 203 may be performed periodically. It is not limited to this.

  Step 204. If the first uplink transmission rate is less than the second uplink transmission rate, the adaptive transmission policy is determined.

  After calculating the first uplink transmission rate and the second uplink transmission rate, the terminal may detect whether the first uplink transmission rate is less than the second uplink transmission rate, and If the link transmission rate is less than the second uplink transmission rate, the terminal determines an adaptive transmission policy.

  The adaptive transmission policy is used to instruct the terminal to reduce the size of the uplink acknowledgment data packets sent in the unit time period so that the service's uplink acknowledgment data packets are When transmitted at a rate below the transmission rate, downlink data packets of the service may be transmitted at a rate above the downlink transmission rate. Optionally, the total size of the uplink acknowledgment data packets sent by the terminal in a unit period according to the instructions of the adaptive transmission policy is the uplink acknowledgment transmitted by the terminal in the unit period according to the instructions of the past transmission policy. It is smaller than the total size of the response data packet. The past transmission policy is the transmission policy used before the adaptive transmission policy is determined. The unit period may be a preset period, for example 1 second or 30 seconds. The reduction in the total size of the uplink acknowledgment data packets transmitted in a unit period is the reduction in size of one uplink acknowledgment data packet that needs to be transmitted, or the uplink acknowledgment data that needs to be transmitted. It may be a reduced number of packets, or both.

  During the actual implementation, the terminal may determine the adaptive transmission policy in at least one of the following possible implementations.

  In a first possible implementation, the target data packet format of the uplink acknowledgment data packet is determined.

  If the first uplink transmission rate is less than the second uplink transmission rate, the terminal has a relatively small uplink acknowledgment in order to match the uplink rate with the downlink rate and reduce the effect on downlink throughput. Data packets may be constructed and transmitted. Optionally, the terminal may determine the target data packet format of the uplink acknowledgment data packet. The size of the uplink acknowledgment data packet in the target data packet format is smaller than the size of the uplink acknowledgment data packet in the initial data packet format. The time when the target data packet format is determined is the first time, and the initial data packet format is the data packet format used when the uplink acknowledgment data packet needs to be sent at the first time. . Optionally, the initial data packet format is the data packet format of previously transmitted uplink acknowledgment data packets, in other words the data packet of uplink acknowledgment data packets used before the adaptive transmission policy is used. Format. The initial data packet format is a format defined in the system.

  The target data packet format includes indication information used to indicate the highest sequence number of correctly received downlink data packets, or includes the indication information and the received time stamp information. The indication information may be the maximum sequence number of downlink data packets received continuously or the sequence number of the next downlink data packet to be received. During the actual implementation, if the target data packet format does not include Selective Acknowledgment (SACK), the indication information is the sequence of the next downlink data packet of continuously received downlink data packets. If the target data packet format includes a SACK, the indication information is a sequence number of the next downlink data packet of the downlink data packet confirmed by the SACK.

  Optionally, FIG. 3 shows the general format of an uplink acknowledgment data packet in TCP. In the case of TCP, the target data packet format is TCP header or TCP header + timestamp (optional). Referring to FIG. 3, the 32-bit acknowledgment sequence number in the TCP header is the highest sequence number of consecutively received downlink data packets. Optionally, some domains in the TCP header of the target data packet format may be omitted to further reduce the size of the uplink acknowledgment data packet in the target data packet format. For example, the 32-bit sequence number domain shown in FIG. 3 may be omitted in the TCP header. In TCP, a timestamp in the option and some received data packet information (TCP SACK or TCP Duplicate-Selective Acknowledgment (D-SACK)) is used during the establishment of the TCP connection by the receiver and This is a function agreed upon by the sender. Therefore, once the feature is determined to be supported, the time stamp information is always carried, and if the data packets are received discontinuously, some received data packet information in the option is carried. Therefore, the uplink acknowledgment data packet in the target data packet format is smaller than the uplink acknowledgment data packet in the initial data packet format. For example, if the initial data packet format is TCP header + time stamp, the target data packet format may be TCP header. In another example, if the initial data packet format is TCP D-SACK, the target data packet format may be TCP header or TCP header + timestamp.

  In addition, the uplink acknowledgment data packet may further include a data portion, which typically includes a relatively large amount of content. As such, in this embodiment, the target data packet format may not include a data portion to reduce the size of the uplink acknowledgment data packet in the target data packet format, and the data portion and the uplink acknowledgment data packet may be separate. Sent to. It is not limited to this.

  Optionally, in the QUIC, the data packet format is the Largest ACKed (the QUIC ACK includes only one domain), N ACK blocks (N ≧ 1), Largest ACKed + timestamp, Largest ACKed + Time since large ACKed block, or Large. It may include ACKed + timestamp + Time since large ACKed block. During the actual implementation, the data packet format may further include another field, eg the type field. This embodiment does not limit this. In general, the acknowledgment packet format in QUIC is not completely determined. With subsequent evolution, the domain name in the data packet format described above may change. Only one example is used here and the function of each domain is used as a limitation.

During the actual implementation, this step comprises calculating a difference between the second uplink transmission rate and the first uplink transmission rate, and obtaining a target data packet format corresponding to the difference. May be included. The larger the determined uplink acknowledgment data packet in the target data packet format, the smaller the difference. Optionally, the terminal may determine the target data packet format corresponding to the difference based on the correspondence between the difference and the target data packet format. The correspondence may be a correspondence between the difference range and the data packet format. For example, the initial data packet format is TCP SACK. Table 1 shows possible correspondences. In another example, the initial data packet format is TCP D-SACK. Table 2 shows possible correspondences.

  For example, the method applies to TCP and the initial data packet format is TCP SACK. Based on Table 1, assuming that the calculated difference is 10, the terminal may determine the TCP header + timestamp as the target data packet format, or, assuming that the calculated difference is 50, the terminal may use TCP The header may be determined as the target data packet format.

  In a second possible implementation, the transmission opportunity for uplink acknowledgment data packets is determined. The transmission opportunity is returning an uplink acknowledgment data packet after M downlink data packets have been received, M is an integer greater than N, and the time when the transmission opportunity is determined is the second time. Yes, N is the number of downlink data packets received if the uplink acknowledgment data packet needs to be transmitted at the second time point.

  For example, when determining a transmission opportunity, after receiving three downlink data packets, the terminal sends one uplink acknowledgment data packet to the network side device. In this case, N may be 3 and M determined by the terminal may be 4 or 5. It is not limited to this.

  The terminal may acquire the preset M. Of course during actual implementation, this step is further to calculate the difference between the second uplink transmission rate and the first uplink transmission rate and to obtain the value of M corresponding to the difference. And a step of acquiring, in which the difference increases as the value of M increases. Optionally, the terminal may query the value of M corresponding to the calculated difference based on the correspondence between the difference range and the value of M. It is not limited to this.

  The higher the value of M, the greater the number of downlink data packets received before the uplink acknowledgment data packet is returned. Therefore, since the network side device does not receive the uplink acknowledgment data packet after transmitting a large number of downlink data packets, the value of M is set to a value larger than a preset value in order to solve the problem that the system performance is deteriorated. The small, preset value may be an empirical value. This embodiment does not limit this.

  It should be noted that the transmission opportunity may alternatively return an uplink acknowledgment data packet within the target duration after each downlink data packet is correctly received. The target duration is less than the preset period, the preset period is the interval period in which the uplink acknowledgment data packet is returned after each downlink data packet has been correctly received so far. For example, the preset period is 20 ms. In order to guarantee the return rate of the uplink acknowledgment data packet, the terminal may return the uplink acknowledgment data packet to the network side device within 5 ms after receiving the downlink data packet.

  In a third possible implementation, if the network-side device does not enable the Forward Error Correction (FEC) mechanism for downlink data transmission, the first command information is generated or the downlink information is generated. A first size of FEC group for data transmission is calculated. The first command information is used to command to enable the FEC mechanism for downlink data transmission, and when the network-side device enables the FEC mechanism for downlink data transmission, the FEC group for downlink data transmission. A second size of is calculated. The second size is smaller than the original size of the FEC group. The original size is the size of the FEC group used in the FEC mechanism for downlink data transmission enabled by the network side device.

  In a third possible implementation, the terminal may further detect if the network-side device has enabled the FEC mechanism for downlink data transmission. After the FEC mechanism for downlink data transmission is enabled, the accuracy of reception of downlink data packets by the terminal is improved. In other words, the number or size of uplink acknowledgment data packets that need to be transmitted is reduced. Therefore, if the network-side device does not enable the FEC mechanism for downlink data transmission, an uplink acknowledgment data packet is sent if the first uplink transmission rate is less than the second uplink transmission rate. In order to ensure the, the terminal may generate a first command information, which is used to command the network side device to enable the FEC mechanism for downlink data transmission. Optionally, the terminal may calculate a first size of FEC group. This embodiment does not limit this. However, if the detection result of the terminal is that the network-side device has enabled the FEC mechanism for downlink data transmission, the smaller the FEC group, the higher the redundancy, and the terminal has a problem with downlink data packets. The terminal may calculate a second size of the FEC group for the downlink data transmission in order to guarantee the transmission of the uplink acknowledgment data packet, since it is more likely to receive it. It should be noted that the FEC mechanism exists only at the server or transport layer. Therefore, the network side device may be a service server or a device having a transport layer function.

  Optionally, the terminal may calculate the first size based on the existing calculation scheme of FEC group. It is not limited to this. The step of calculating the second size by the terminal calculates the difference between the second uplink transmission rate and the first uplink transmission rate, and obtains the second size corresponding to the difference. The step of acquiring, wherein the larger the value of the second size is, the smaller the difference corresponding to the second size is.

  Only one example in which the terminal determines the adaptive transmission policy in at least one of the three implementations above is used above. Optionally, the terminal may determine the adaptive transmission policy in another way. This embodiment does not limit this.

  Optionally, the terminal may perform the transmission according to an existing transmission policy if the first uplink transmission rate is not less than the second uplink transmission rate. In this embodiment, details are not described again.

  Step 205. Data is transmitted to the peer end according to the adaptive transmission policy.

  Since the adaptive transmission policy may include multiple implementations, this stage may correspondingly include the following possible implementations.

  If the adaptive transmission policy includes the target data packet format of the uplink acknowledgment data packet, the uplink acknowledgment data packet is sent to the network side device based on the target data packet format.

  If the uplink acknowledgment data packet needs to be sent after it is determined that the target data packet format has been obtained, the terminal shall send the uplink acknowledgment data packet in the target data packet format to the network-side device. Good. For example, in a TCP-based communication system, if the obtained target data packet format is determined to be a TCP header, the terminal sends an uplink acknowledgment data packet, and the uplink acknowledgment including only the TCP header. The data packet may be transmitted.

  If the adaptive transmission policy includes a transmission opportunity for the uplink acknowledgment data packet, the uplink acknowledgment data packet is transmitted to the network-side device based on the transmission opportunity.

  Optionally, if the transmission opportunity returns an uplink acknowledgment data packet after M downlink data packets have been received, then the terminal is in charge of M during data transmission between the terminal and the network side device. Uplink acknowledgment data packets may be returned after receiving the number of downlink data packets. It is not limited to this. If the transmission opportunity returns an uplink acknowledgment data packet within the target duration after the downlink data packet is received, the terminal shall detect the uplink acknowledgment data packet within the target duration after the downlink data packet is received. The data packet may be returned to the network side device.

  If the adaptive transmission policy includes the first command information, the first command information is transmitted to the network-side device, and after receiving the first command information, the network-side device receives the forward error correction FEC mechanism for downlink data transmission. To enable. The first command information is used to command the FEC mechanism for downlink data transmission.

  In the case of TCP, the terminal may send the first command information to the network side device using the TCP option. It is not limited to this. In the case of QUIC, the terminal may send the first command information to the network-side device using QUIC QINDOW_UPDATE. Only one example where the terminal sends the first command information to the network side device using the above two types of information is used above. Optionally, during the actual implementation, for each transmission system, the terminal may send the first command information to the network-side device in another way. The actual implementation is not limited to this embodiment.

  If the adaptive transmission policy includes a first size, the first size is sent to the network-side device, and after receiving the first size, the network-side device enables the FEC mechanism for downlink data transmission, Send downlink data packets to the terminal based on the size of The first size is a size of the FEC group generated by the terminal and used for downlink data transmission.

  This implementation is similar to the implementation above. Details will not be repeated here.

  If the adaptive transmission policy includes the second size, the second size is transmitted to the network-side device, and after receiving the second size, the network-side device terminates the downlink data packet based on the second size. Send to. The second size is the size of the FEC group generated by the terminal and used for downlink data transmission.

  During the actual implementation, steps 204 and 205 may be implemented by the transport layer or physical layer in the terminal. This embodiment does not limit this.

  In conclusion, according to the adaptive transmission method provided in this embodiment, the adaptive transmission policy is determined when the first uplink transmission rate is smaller than the second uplink transmission rate, and the data is transmitted to the peer end by the adaptive transmission policy. By being transmitted, the problem of relatively low downlink throughput in the related art due to relatively low uplink transmission rate is solved, and by reducing the size of the uplink acknowledgment data packet, it needs to be transmitted. The time used to send certain uplink acknowledgment data packets may be reduced. Thereby, the normal uplink transmission is guaranteed when the first uplink transmission rate is relatively low, and the downlink throughput is improved.

  FIG. 4 is a method flowchart of an adaptive transmission method according to another embodiment of the present invention. This embodiment will be described using an example in which the adaptive transmission method is applied to the network-side device 120 in FIG. As shown in FIG. 4, the adaptive transmission method includes the following steps.

  Step 401. Receive a first uplink transmission rate sent by the terminal.

  The first uplink transmission rate is the rate calculated and transmitted by the terminal based on the uplink rate calculation parameter. The calculation method for the terminal to calculate the first uplink transmission rate is the same as the calculation method of step 201 in the above embodiment. Details will not be repeated here.

  Step 402. Get downlink transmission rate

  Obtaining the downlink transmission rate by the network-side device may include obtaining a downlink rate calculation parameter and calculating a downlink transmission rate based on the downlink rate calculation parameter. The specific calculation method is the same as the calculation method in step 202 in the above embodiment. Details will not be repeated here.

  Step 403. A second uplink transmission rate is calculated based on the downlink transmission rate.

  This step is similar to step 203 in the above-described embodiment. Details will not be repeated here.

  During the actual implementation, the network-side device may further receive the service request sent by the terminal and then calculate the second uplink transmission rate based on the downlink transmission rate and the service request. The service request may include at least one of service type and service context information. In addition, the calculation method for the network side device to calculate the second uplink transmission rate based on the downlink transmission rate and the service request is the same as the calculation method for the terminal to calculate the second uplink transmission rate in step 203. It is the same. Details will not be repeated here.

  In addition, only the example where the network side device obtains the second uplink transmission rate using steps 402 and 403 is used in this embodiment. Optionally, the network-side device may obtain the second uplink transmission rate by receiving the second uplink transmission rate sent by the terminal. The second uplink transmission rate is the rate acquired and transmitted by the terminal. The acquisition method for the terminal to acquire the second uplink transmission rate is the same as the acquisition method in steps 202 and 203 in the above-described embodiment. Details will not be repeated here.

  Steps 401 to 403 may be performed by any entity in the transport layer, network layer, physical layer, MAC layer, RLC layer, or PDCP layer.

  Step 404. If the first uplink transmission rate is less than the second uplink transmission rate, the adaptive transmission policy is determined.

  This stage is similar to stage 204 in the embodiment described above. Details will not be repeated here.

  Optionally, if the first uplink transmission rate is not less than the second uplink rate, the network-side device may perform the transmission according to the existing transmission policy. In this embodiment, details are not described again.

  Step 405. Data is transmitted to the peer end according to the adaptive transmission policy.

  Correspondingly, this stage may include the following possible implementations, since the adaptive transmission policy may include multiple implementations.

  If the adaptive transmission policy includes a target data packet format of the uplink acknowledgment data packet and / or an opportunity of transmission of the uplink acknowledgment data packet, the target data packet format and / or the opportunity of transmission is transmitted to the terminal, the target data packet format And / or an uplink acknowledgment data packet transmitted by the terminal based on the transmission opportunity is received.

  Optionally, when the terminal receives the target data packet format, the terminal sends an uplink acknowledgment data packet in the target data packet format if the terminal needs to send an uplink acknowledgment data packet. May be sent to. For example, if the target data packet format is TCP ACK, the terminal may send the uplink acknowledgment data packet in TCP ACK format to the network side device when the uplink acknowledgment data packet needs to be sent. . When the terminal receives a transmission opportunity, the terminal may send an uplink acknowledgment data packet to the network side device when the transmission opportunity arrives. For example, when four downlink data packets are received and the transmission opportunity returns an uplink acknowledgment data packet to the network-side device, the terminal may update every time the terminal receives four downlink data packets. The link acknowledgment data packet may be returned to the network side device.

  If the adaptive transmission policy includes the first command information, the FEC mechanism for downlink data transmission is enabled. The first command information is used to command the FEC mechanism for downlink data transmission.

  If the adaptive transmission policy includes the first size, the FEC mechanism for downlink data transmission is enabled and the downlink data packet is sent to the terminal based on the first size. The first size is a size of the FEC group generated by the network side device and used for downlink data transmission.

  If the adaptive transmission policy includes the second size, the downlink data packet is transmitted to the terminal based on the second size. The second size is the size of the FEC group generated by the network side device and used for downlink data transmission.

  Steps 404 and 405 may be implemented by the transport layer or physical layer in the network side device. This embodiment does not limit this.

  In conclusion, according to the adaptive transmission method provided in this embodiment, the adaptive transmission policy is determined when the first uplink transmission rate is smaller than the second uplink transmission rate, and the data is transmitted to the peer end by the adaptive transmission policy. By being transmitted, the problem of relatively low downlink throughput in the related art due to relatively low uplink transmission rate is solved, and by reducing the size of the uplink acknowledgment data packet, it needs to be transmitted. The time used to send certain uplink acknowledgment data packets may be reduced. Thereby, the normal uplink transmission is guaranteed when the first uplink transmission rate is relatively low, and the downlink throughput is improved.

  In the scenario where the network side device sends downlink data packets to the terminal and the terminal feeds back uplink acknowledgment data packets, only one example where the above method is applied is used to describe the above embodiments. . During the actual implementation, the method may be applied to the scenario where the terminal sends the uplink data packet to the network side device and the network side device feeds back the downlink acknowledgment data packet. In this case, the method may include the following steps.

  1. Obtaining a first downlink transmission rate and a second downlink transmission rate of the network side device. The first downlink transmission rate is an available downlink transmission rate and the second downlink transmission rate is needed to support the uplink transmission rate at which the uplink data packets of the service are transmitted. Downlink transmission rate.

  2. If the first downlink transmission rate is less than the second downlink transmission rate, then determine an adaptive transmission policy. The adaptive transmission policy is used to instruct the network-side device to reduce the size of downlink acknowledgment data packets sent within a unit time period so that the downlink acknowledgment data packets of the service are If transmitted at a rate below the downlink transmission rate, the uplink data packets of the service may be transmitted above the uplink transmission rate.

  3. Data is transmitted to the peer end according to the adaptive transmission policy.

  The mounting details of the steps are similar to the mounting details of the embodiment corresponding to FIGS. 2 and 3. In this embodiment, details are not described again.

  FIG. 5 is a schematic structural diagram of an adaptive transmission apparatus according to an exemplary embodiment of the present application. The adaptive transmission device may be the terminal 110 of the mobile communication system shown in FIG. 1 or the network side device 120 shown in FIG. The adaptive transmission device includes a processor 51, a receiver 52, a transmitter 53, a memory 54, and a bus 55.

  Processor 51 includes one or more processing cores, which operate software programs and modules to execute various functional applications and process information.

  The receiver 52 and the transmitter 53 may be implemented as communication components. The communication component may be a communication chip. The communication chip may include a reception module, a transmission module, a modulation and demodulation module, etc., and is configured to modulate and / or demodulate information using a wireless signal and receive or transmit information.

  The memory 54 is connected to the processor 51 by using the bus 55.

  The memory 54 may mainly include a program storage area and a data storage area. The program storage area may store an operation system 541, an acquisition module 542, a determination module 543, a transmission module 544, an application program 545 required by at least one other function, and the like. The data storage area may store data and the like formed based on the use of the signal receiving end. Additionally, the memory 54 may be implemented with any type of volatile or non-volatile storage device, or a combination thereof.

  The processor 51 is arranged to perform the functions of the acquisition module 542 for implementing the relevant acquisition stages in the method embodiments described above. The processor 51 is arranged to perform the functions of the decision module 543 for implementing the relevant decision steps in the method embodiments described above. The processor 51 is arranged to perform the functions of the transmission module 544 for implementing the relevant transmission stages in the method embodiments described above.

  In addition, the memory 54 is a static random access memory (SRAM), an electrically erasable programmable read only memory (EEPROM), an erasable programmable read only memory (EPROM), a programmable read only memory (PROM), a read only memory (ROM). , A magnetic memory, a flash memory, a magnetic disk, or an optical disk, and may be implemented by any type of volatile or non-volatile storage device, or a combination thereof.

  FIG. 6 is a schematic structural diagram of an adaptive transmission apparatus according to an embodiment of the present invention. As shown in FIG. 6, the adaptive transmission device may include an acquisition unit 610, a determination unit 620, and a transmission unit 630.

  When the adaptive transmission device is applied to the terminal, the function of the unit is as follows.

  The acquisition unit 610 is configured to perform steps 201 to 203 in the above-described embodiment.

  The decision unit 620 is configured to perform the step 204 in the above-described embodiment.

  The transmission unit 630 is configured to perform the step 205 in the above-described embodiment.

  When the adaptive transmission device is applied to the network side device, the function of the unit is as follows.

  The acquisition unit 610 is configured to perform steps 401 to 403 in the above-described embodiment.

  The decision unit 620 is configured to perform the step 404 in the above-described embodiment.

  The transmission unit 630 is configured to perform the step 405 in the above-described embodiment.

  In conclusion, according to the adaptive transmission method provided in this embodiment, the adaptive transmission policy is determined when the first uplink transmission rate is smaller than the second uplink transmission rate, and the data is transmitted to the peer end by the adaptive transmission policy. By being transmitted, the problem of relatively low downlink throughput in the related art due to relatively low uplink transmission rate is solved, and by reducing the size of the uplink acknowledgment data packet, it needs to be transmitted. The time used to send certain uplink acknowledgment data packets may be reduced. Thereby, the normal uplink transmission is guaranteed when the first uplink transmission rate is relatively low, and the downlink throughput is improved.

  Those skilled in the art will understand that each unit and each algorithm step may be implemented by electronic hardware or a combination of computer software and electronic hardware in combination with the examples described in the embodiments disclosed herein. Will recognize. Whether the function is performed by hardware or software depends on the particular application of the technical solution and the design constraints.

  It will be apparent to those skilled in the art that, for ease and brevity of the description, for detailed working processes of the above-described apparatus and units, refer to the corresponding processes in the above-described method embodiments. Details will not be repeated here.

  It should be appreciated that in the embodiments provided herein, the disclosed apparatus and method may be implemented in other ways. For example, the described apparatus embodiment is merely an example. For example, the division of units may only be division of logical functions, and in actual implementation there may be other divisions. For example, multiple units or components may be combined or integrated into another system, or some functionality may be ignored or not performed.

  Units described as separate parts may or may not be physically separate, and parts labeled as units may or may not be physical units and may be located in one place. , Or may be distributed over multiple network units. Some or all of these units may be selected based on the actual requirements to achieve the goals of the solution of the embodiments.

  The above description is merely specific implementations of the present application and is not intended to limit the protection scope of the present application. Any modification or substitution readily figured out by a person skilled in the art within the technical scope disclosed in the present application shall fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Terminal 110 is a mobile terminal, such as a mobile phone (also referred to as a “cellular” telephone) or a computer having a mobile terminal, such as a portable, pocket-sized, handheld, self-contained, or on-board mobile device. You may It is not limited to this. In another example, the terminal 110 may be a subscriber unit, a subscriber station, a mobile station, a mobile console, a mobile station, a remote station, or a remote station. Point (Access Point, AP), remote terminal (Remote Terminal), access terminal (Access Terminal, AT), user terminal (User Terminal, UT), user agent (User Agent, UA), terminal (User Device), subscriber premises equipment (Customer premises equipment, CPE), or user equipment (user Equ pment, may be a UE). Optionally, the terminal 110 may be a relay. This embodiment does not limit this.

The network-side device 120 may be a radio access network (RAN) device, a core network device, a service server, or any relay device in the service data transmission process. The relay device may be a UE. It is not limited to this. In addition, during the actual implementation, the network-side device 120 may be further divided into two logical functional entities, a control plane and a user plane, and the functions of the network-side device described in the embodiments below are controlled. It may be implemented by a plane or a user plane. It is not limited to this.

Optionally, if the first uplink transmission rate is not less than the second uplink transmission rate, the network-side device may perform the transmission according to the existing transmission policy. In this embodiment, details are not described again.

Claims (30)

An adaptive transmission method,
Obtaining a first uplink transmission rate and a second uplink transmission rate of the terminal, wherein the first uplink transmission rate is an available uplink transmission rate, and the second uplink transmission rate is available. The transmission rate is an uplink transmission rate required to support the downlink transmission rate at which the downlink data packet of the service is transmitted, the obtaining step, and
Determining the adaptive transmission policy when the first uplink transmission rate is lower than the second uplink transmission rate, the adaptive transmission policy being transmitted to the terminal in the unit period. Used to instruct to reduce the size of an acknowledgment data packet, the uplink acknowledgment data packet of the service being transmitted at a rate less than or equal to the first uplink transmission rate, the service. Determining that the downlink data packets of can be transmitted at a rate greater than or equal to the downlink transmission rate;
Transmitting data to a peer end according to the adaptive transmission policy. The steps of determining the adaptive transmission policy include:
Determining the target data packet format of the uplink acknowledgment data packet, wherein the size of the uplink acknowledgment data packet in the target data packet format is the size of the uplink acknowledgment data packet in the initial data packet format. Is smaller, the time when the target data packet format is determined is a first time, and the initial data packet format is used when the uplink acknowledgment data packet needs to be transmitted at the first time. Determining which is the data packet format used and / or determining the transmission opportunity of the uplink acknowledgment data packet, the transmission opportunity being M downlink data Returning the uplink acknowledgment data packet after a packet is received, M is an integer greater than N, the time when the transmission opportunity is determined is the second time, and N is the up Determining the number of downlink data packets received when a link acknowledgment data packet needs to be transmitted at said second time point, and / or
If the network-side device does not enable the forward error correction FEC mechanism for downlink data transmission, generate first command information or calculate a first size of FEC group for the downlink data transmission. The first command information is used to command to enable the FEC mechanism for the downlink data transmission, and the network-side device enables the FEC mechanism for the downlink data transmission. The second size of the FEC group for the downlink data transmission is calculated, the second size is smaller than the original size of the FEC group, and the original size depends on the network-side device. Enabled Downlin Wherein for data transmission is the size of the FEC group used in the FEC mechanism, comprising the step of generating or computing method according to claim 1. The method of determining a target data packet format of the uplink acknowledgment data packet comprises:
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate;
Obtaining the target data packet format corresponding to the difference, wherein the larger the uplink acknowledgment data packet in the target data packet format, the smaller the difference. The method described. The step of determining an opportunity to transmit the uplink acknowledgment data packet comprises:
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate;
Obtaining the value of M corresponding to the difference, wherein the larger the value of M, the larger the difference. Calculating the second size of the FEC group for the downlink data transmission,
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate;
Acquiring the second size corresponding to the difference, wherein the larger the value of the second size, the smaller the difference corresponding to the second size. Item 2. The method according to Item 2. The method is applied to the terminal, and the step of transmitting data to a peer end according to the adaptive transmission policy comprises:
Transmitting the uplink acknowledgment data packet to the network-side device based on the target data packet format, if the adaptive transmission policy comprises the target data packet format of the uplink acknowledgment data packet,
Transmitting the uplink acknowledgment data packet to the network-side device based on the transmission opportunity, if the adaptive transmission policy has the transmission opportunity of the uplink acknowledgment data packet,
Transmitting the first command information to the network-side device when the adaptive transmission policy includes the first command information, the first command information including the FEC for the downlink data transmission. A sending step, used to instruct the mechanism to be enabled,
If the adaptive transmission policy has the first size, the step of transmitting the first size to the network side device, after receiving the first size, the network side device may Enable the FEC mechanism for link data transmission and send a downlink data packet to the terminal based on the first size, the first size being a pre-generated FEC group for the downlink data transmission. Transmitting the second size to the network-side device if the adaptive transmission policy has the second size, and the second size is received. Then, the network side device downlinks to the terminal based on the second size. Sends Tapaketto, the second size, said the size of the FEC group which is previously generated for the downlink data transmission, comprising the step of transmitting, the method according to any one of claims 1 to 5. The method is applied to the network-side device, and the step of transmitting data to a peer end according to the adaptive transmission policy comprises:
If the adaptive transmission policy comprises the target data packet format of the uplink acknowledgment data packet and / or the transmission opportunity of the uplink acknowledgment data packet, the target data packet format of the terminal and / or the Transmitting a transmission opportunity and receiving the uplink acknowledgment data packet transmitted by the terminal based on the target data packet format and / or the transmission opportunity;
Enabling the FEC mechanism for the downlink data transmission when the adaptive transmission policy includes the first instruction information, the first instruction information including the FEC mechanism for the downlink data transmission. Used to instruct to enable, the enabling step,
Enabling the FEC mechanism for the downlink data transmission if the adaptive transmission policy has the first size, and transmitting downlink data packets to the terminal based on the first size. , The first size is a size of a pre-generated FEC group for the downlink data transmission, the transmitting step, or to the second size if the adaptive transmission policy has the second size. Based on transmitting the downlink data packet to the terminal, the second size being a size of a pre-generated FEC group for the downlink data transmission. The method according to any one of 1 to 5. The step of obtaining the first uplink transmission rate of the terminal comprises:
When the method is applied to the terminal, the method includes obtaining an uplink rate calculation parameter, and determining the first uplink transmission rate based on the uplink rate calculation parameter, or the method The method according to any one of claims 1 to 7, comprising: receiving the first uplink transmission rate transmitted by the terminal when is applied to the network-side device. The step of obtaining the second uplink transmission rate of the terminal comprises:
Obtaining the downlink transmission rate,
Calculating the second uplink transmission rate based on the downlink transmission rate. The method is applied to the terminal, and the step of obtaining the downlink transmission rate comprises:
Receiving the downlink transmission rate transmitted by the network side device, or receiving a downlink rate calculation parameter transmitted by the network side device, and performing the downlink transmission based on the downlink rate calculation parameter. The method of claim 9 including the step of calculating a rate. An adaptive transmission device comprising a processor,
The processor is configured to obtain a first uplink transmission rate and a second uplink transmission rate of the terminal, the first uplink transmission rate being an available uplink transmission rate, The second uplink transmission rate is an uplink transmission rate required to support a downlink transmission rate at which a downlink data packet of a service is transmitted,
The processor is further configured to determine an adaptive transmission policy when the first uplink transmission rate is less than the second uplink transmission rate, the adaptive transmission policy being transmitted in a unit period. Used to instruct the terminal to reduce the size of an uplink acknowledgment data packet that is transmitted, the uplink acknowledgment data packet of the service being transmitted at a rate less than or equal to the first uplink transmission rate. The downlink data packets of the service may be transmitted at a rate greater than or equal to the downlink transmission rate,
The processor is further configured to transmit data to a peer end according to the adaptive transmission policy. The processor further comprises
The uplink acknowledgment data packet is configured to determine a target data packet format of the uplink acknowledgment data packet, and the size of the uplink acknowledgment data packet in the target data packet format is an uplink acknowledgment data packet in an initial data packet format. Is smaller than the size of the first data packet format, the time point at which the target data packet format is determined is a first time point, and the initial data packet format requires that the uplink acknowledgment data packet be transmitted at the first time point. The data packet format used in the case, and / or the processor is further configured to determine a transmission opportunity of the uplink acknowledgment data packet, the transmission opportunity being , Returning the uplink acknowledgment data packet after M downlink data packets have been received, M being an integer greater than N, and the time when the transmission opportunity is determined is a second time. Yes, N is the number of downlink data packets received if the uplink acknowledgment data packet needs to be transmitted at the second time point, and / or
The processor is further used to instruct the network-side device to enable the FEC mechanism for downlink data transmission if the forward error correction FEC mechanism for downlink data transmission is not enabled. Of the FEC group for the downlink data transmission, or the network side device has enabled the FEC mechanism for the downlink data transmission. In the case, it is configured to calculate a second size of the FEC group for the downlink data transmission, the second size being smaller than the original size of the FEC group, and the original size being Network side device More said for that was enabled the downlink data transmission is the size of the FEC group used in the FEC mechanism according to claim 11. The processor further comprises
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate,
13. The apparatus of claim 12, configured to obtain the target data packet format corresponding to the difference, the larger the uplink acknowledgment data packet in the target data packet format, the smaller the difference. The processor further comprises
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate,
13. The apparatus of claim 12, configured to obtain a value of M corresponding to the difference, the greater the value of M, the greater the difference. The processor further comprises
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate,
The method according to claim 12, wherein the second size corresponding to the difference is obtained, and the larger the value of the second size is, the smaller the difference corresponding to the second size is. apparatus. The device is applied to the terminal, and the processor further comprises
If the adaptive transmission policy comprises the target data packet format of the uplink acknowledgment data packet, the adaptive transmission policy is configured to send the uplink acknowledgment data packet to the network-side device based on the target data packet format. Has been done,
The processor is further configured to, when the adaptive transmission policy has the transmission opportunity of the uplink acknowledgment data packet, transmit the uplink acknowledgment data packet to the network-side device based on the transmission opportunity. Configured or
The processor is further configured to send the first command information to the network-side device if the adaptive transmission policy has the first command information, and the first command information is Used to instruct to enable the FEC mechanism for downlink data transmission,
The processor is further configured to send the first size to the network-side device if the adaptive transmission policy has the first size, and after receiving the first size, the The network-side device enables the FEC mechanism for the downlink data transmission and sends a downlink data packet to the terminal based on the first size, the first size being the downlink data transmission. Or a size of a pre-generated FEC group for, or the processor is further configured to send the second size to the network-side device if the adaptive transmission policy has the second size. And, after receiving the second size, the network-side device The downlink data packet is transmitted to the terminal based on the second size, and the second size is a size of a pre-generated FEC group for the downlink data transmission. The device according to any one of claims. The apparatus is applied to the network-side device, and the processor further comprises:
If the adaptive transmission policy comprises the target data packet format of the uplink acknowledgment data packet and / or the transmission opportunity of the uplink acknowledgment data packet, the target data packet format of the terminal and / or the Configured to transmit a transmission opportunity and receive the uplink acknowledgment data packet transmitted by the terminal based on the target data packet format and / or the transmission opportunity;
The processor is further configured to enable the FEC mechanism for the downlink data transmission when the adaptive transmission policy comprises the first command information, the first command information being the down command. Used to instruct to enable the FEC mechanism for link data transmission,
The processor further enables the FEC mechanism for the downlink data transmission if the adaptive transmission policy has the first size and sends a downlink data packet to the terminal based on the first size. And the first size is a size of a pre-generated FEC group for the downlink data transmission, or the processor is further configured such that the adaptive transmission policy sets the second size. If it has, it is configured to send a downlink data packet to the terminal based on the second size, the second size being a size of a pre-generated FEC group for the downlink data transmission. The device according to any one of claims 11 to 15, wherein If the device is applied to the terminal, the processor is further configured to obtain an uplink rate calculation parameter and determine the first uplink transmission rate based on the uplink rate calculation parameter. Or if the apparatus is applied to the network side device, the apparatus further comprises a receiver, the receiver configured to receive the first uplink transmission rate transmitted by the terminal. Has been
A device according to any one of claims 11 to 17. The processor further comprises
Obtaining the downlink transmission rate,
The apparatus according to any one of claims 11 to 17, wherein the apparatus is configured to calculate the second uplink transmission rate based on the downlink transmission rate. The device is applied to the terminal, the device further comprises a receiver, the receiver comprising:
Is configured to receive the downlink transmission rate transmitted by the network side device, or to receive a downlink rate calculation parameter transmitted by the network side device, and based on the downlink rate calculation parameter. 20. The apparatus of claim 19, configured to calculate the downlink transmission rate. An adaptive transmission device, which is an acquisition unit configured to acquire a first uplink transmission rate and a second uplink transmission rate of a terminal, the first uplink transmission rate being available Acquisition unit, the second uplink transmission rate is an uplink transmission rate required to support a downlink transmission rate at which a downlink data packet of a service is transmitted. When,
A determining unit configured to determine an adaptive transmission policy when the first uplink transmission rate is lower than the second uplink transmission rate, wherein the adaptive transmission policy is transmitted in a unit period. Used to instruct the terminal to reduce the size of an uplink acknowledgment data packet that is transmitted, the uplink acknowledgment data packet of the service being transmitted at a rate less than or equal to the first uplink transmission rate. A decision unit, wherein the downlink data packets of the service may be transmitted at a rate greater than or equal to the downlink transmission rate,
A transmission unit configured to transmit data to a peer end according to the adaptive transmission policy determined by the determination unit. The decision unit further comprises:
The uplink acknowledgment data packet is configured to determine a target data packet format of the uplink acknowledgment data packet, and the size of the uplink acknowledgment data packet in the target data packet format is an uplink acknowledgment data packet in an initial data packet format. Is smaller than the size of the first data packet format, the time point at which the target data packet format is determined is a first time point, and the initial data packet format requires that the uplink acknowledgment data packet be transmitted at the first time point. The data packet format used in the case, and / or the determining unit is further configured to determine a transmission opportunity of the uplink acknowledgment data packet, and the transmission opportunity. Is to return the uplink acknowledgment data packet after M downlink data packets have been received, M is an integer greater than N, and the time when the transmission opportunity is determined is a second time. And N is the number of downlink data packets received if the uplink acknowledgment data packet needs to be transmitted at the second time point, and / or
The determining unit is further used to instruct the network-side device to enable the FEC mechanism for downlink data transmission if the forward error correction FEC mechanism for downlink data transmission is not enabled. Is configured to generate one command information or calculate a first size of an FEC group for the downlink data transmission, the network side device enabling the FEC mechanism for the downlink data transmission. And configured to calculate a second size of the FEC group for the downlink data transmission, the second size being less than the original size of the FEC group, and the original size being The network device By the size of the FEC group used for the FEC mechanism for that it was enabled the downlink data transmission, including a method of generating or computing apparatus of claim 21. The decision unit further comprises:
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate,
23. The apparatus of claim 22, configured to obtain the target data packet format corresponding to the difference, the larger the uplink acknowledgment data packet in the target data packet format, the smaller the difference. The decision unit further comprises:
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate,
23. The apparatus of claim 22, configured to obtain a value of M corresponding to the difference, the greater the value of M, the greater the difference. The decision unit further comprises:
Calculating a difference between the second uplink transmission rate and the first uplink transmission rate,
23. The method of claim 22, wherein the difference is configured to obtain the second size corresponding to the difference, and the larger the value of the second size, the smaller the difference corresponding to the second size. apparatus. The device is applied to the terminal, and the transmission unit further comprises:
If the adaptive transmission policy comprises the target data packet format of the uplink acknowledgment data packet, the adaptive transmission policy is configured to send the uplink acknowledgment data packet to the network-side device based on the target data packet format. Has been done,
The transmission unit is further configured to, when the adaptive transmission policy has the transmission opportunity of the uplink acknowledgment data packet, transmit the uplink acknowledgment data packet to the network-side device based on the transmission opportunity. Is configured to
The transmission unit is further configured to send the first command information to the network-side device if the adaptive transmission policy has the first command information, the first command information comprising: Used to instruct to enable the FEC mechanism for the downlink data transmission,
The transmission unit is further configured to send the first size to the network-side device if the adaptive transmission policy has the first size, and after receiving the first size, The network side device enables the FEC mechanism for the downlink data transmission and sends a downlink data packet to the terminal based on the first size, the first size being the downlink data. A size of a pre-generated FEC group for transmission, or the transmission unit further sends the second size to the network side device if the adaptive transmission policy has the second size. Is configured and, after receiving the second size, the network-side device 22. Sending a downlink data packet to the terminal based on the second size, the second size being a size of a pre-generated FEC group for the downlink data transmission. 25. The device according to any one of 25. The apparatus is applied to the network side device, and the transmission unit further comprises:
If the adaptive transmission policy comprises the target data packet format of the uplink acknowledgment data packet and / or the transmission opportunity of the uplink acknowledgment data packet, the target data packet format of the terminal and / or the Configured to transmit a transmission opportunity and receive the uplink acknowledgment data packet transmitted by the terminal based on the target data packet format and / or the transmission opportunity;
The transmission unit is further configured to enable the FEC mechanism for the downlink data transmission when the adaptive transmission policy comprises the first command information, the first command information comprising: Used to instruct to enable the FEC mechanism for downlink data transmission,
The transmission unit further enables the FEC mechanism for the downlink data transmission if the adaptive transmission policy has the first size and sends downlink data packets to the terminal based on the first size. The first size is a size of a pre-generated FEC group for the downlink data transmission, or the transmission unit is further configured to transmit the adaptive transmission policy to the second. If it has a size, it is configured to send a downlink data packet to the terminal based on the second size, the second size being a size of a pre-generated FEC group for the downlink data transmission. 26. The device according to any one of claims 21 to 25 which is The acquisition unit further comprises
When the apparatus is applied to the terminal, it is configured to obtain an uplink rate calculation parameter and determine the first uplink transmission rate based on the uplink rate calculation parameter, or the apparatus 28. The apparatus according to any one of claims 21 to 27, which is configured to receive the first uplink transmission rate transmitted by the terminal when is applied to the network side device. The acquisition unit further comprises
Obtaining the downlink transmission rate,
28. The apparatus according to any one of claims 21 to 27, configured to calculate the second uplink transmission rate based on the downlink transmission rate. The device is applied to the terminal, and the acquisition unit further comprises:
Is configured to receive the downlink transmission rate transmitted by the network side device, or to receive a downlink rate calculation parameter transmitted by the network side device, and based on the downlink rate calculation parameter. 30. The apparatus of claim 29, configured to calculate the downlink transmission rate.