WO2018058596A1 - Data transmission method and device - Google Patents

Abstract

Provided by the present application are a data transmission method and a device, comprising: a network device sending nth downlink data to a terminal device in an nth scheduling period; the network device receiving uplink feedback information from the terminal device in an (n+1)th scheduling period; if the terminal device does not correctly receive the nth downlink data, wherein sending start time of the uplink feedback information is not earlier than the receiving completion time of the downlink data, then the sending start time of data retransmission is not earlier than receiving completion time of the uplink feedback information in the (n+1)th scheduling period. The terminal device may send the uplink feedback information to the network device in the (n+1)th scheduling period, thereby reducing data transmission delay caused by a timing delay of the feedback information.

Description

Data transmission method and device Technical field

The present application relates to the field of wireless communications, and in particular, to a data transmission method and device.

Background technique

In order to ensure the reliability of data transmission, in the LTE system, a feedback retransmission mechanism is usually used for data transmission. Specifically, after receiving the downlink data sent by the sending end in the nth scheduling period, the receiving end may send, in the n+k scheduling period, the sending end to indicate that the downlink data in the nth scheduling period is Whether the feedback information is successfully received; and the transmitting end may determine, according to the received feedback information, whether the downlink data in the nth scheduling period needs to be retransmitted.

In the LTE system, the uplink feedback information usually occupies the entire scheduling period in the time domain, and the downlink feedback information usually occupies the first symbol in each scheduling period in the time domain. Since the process of generating the feedback information needs to consume a certain time, the receiving end can only send the first to the second and second scheduling periods to indicate whether the downlink data in the nth scheduling period is successfully received. Feedback. For example, for frequency division dual (FDD), the value of k is 4, and for time division duplexing (TDD), although k can have multiple values, However, each value is not less than 4.

That is to say, if a certain transmission error occurs in a certain data in the nth scheduling period, the transmitting end can retransmit the data at least after at least 4 scheduling periods. It can be seen that the feedback retransmission mechanism generally used in the LTE system causes a large data transmission delay due to a large timing delay of the feedback information.

Summary of the invention

The application provides a data transmission method and device to shorten the data transmission delay caused by the timing delay of the feedback information.

In a first aspect, the present application provides a data transmission method, where the method includes: the network device sends the nth downlink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the nth downlink scheduling information is used. The Nth downlink data is scheduled to be transmitted, where the nth data is downlink data in the nth scheduling period, and the value of n is an integer; the network device sends the nth downlink data to the terminal device in the nth scheduling period. The network device receives uplink feedback information from the terminal device in the (n+1)th scheduling period, and the uplink feedback information The device is configured to indicate whether the device correctly receives the nth downlink data; if the terminal device does not correctly receive the nth downlink data, the network device sends the terminal device to the terminal device in the n+2th scheduling period. Transmitting the retransmission data of the nth downlink data, where the initial transmission time of the uplink feedback information is not earlier than the reception completion time of the downlink data; the initial transmission time of the retransmission data is not earlier than the first The reception completion time of the uplink feedback information in the n+1 scheduling period.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the nth downlink scheduling information is carried by a first symbol in the nth scheduling period.

With reference to the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the first k symbols of the nth scheduling period are used to carry the downlink reference signal, where k is An integer with a value not less than 1.

In a second aspect, the present application further provides another data transmission method, including: receiving, by the terminal device, the nth downlink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the integer value of n is an integer The terminal device receives the nth downlink data from the network device in the nth scheduling period according to the scheduling of the nth downlink scheduling information; the terminal device sends the uplink feedback information to the network device in the (n+1)th scheduling period, The uplink feedback information is used to indicate whether the nth downlink data is correctly received by the terminal device; if the uplink feedback information is used to indicate that the nth downlink data is not correctly received by the terminal device, The terminal device receives the retransmission data of the nth downlink data in the n+2th scheduling period, where the initial transmission start time of the uplink feedback information is not earlier than the reception completion time of the downlink data; The initial transmission start time of the downlink data of the n+2 scheduling period is not earlier than the uplink feedback information transmission completion time.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first k symbols of the (n+1)th scheduling period are used to carry an uplink reference signal, and k is an integer whose value is not less than 1.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the uplink feedback information is carried by the second symbol or the third symbol of the (n+1)th scheduling period.

In a third aspect, the present application further provides a data transmission method, where the network device sends the nth uplink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; The network device receives the nth uplink data scheduled by the nth uplink scheduling information from the terminal device in the nth scheduling period; the indication information sent by the network device in the (n+1)th scheduling period, the indication The information is used to indicate whether the nth uplink data is correctly received by the network device, where the sending start time of the indication information is not earlier than the nth uplink data receiving completion time.

With the third aspect, in a first possible implementation manner of the third aspect, the sending, by the network device, the indication information to the terminal device includes: sending, by the network device, the downlink feedback information to the terminal device in the (n+1)th scheduling period, where The downlink feedback information is used to indicate whether the uplink data in the nth scheduling period is correctly received by the network device, where the initial sending start time of the downlink feedback information is not earlier than the receiving completion time of the uplink data. .

With reference to the third aspect, in a second possible implementation manner of the third aspect, the sending, by the network device, the indication information to the terminal device includes: if the nth uplink data is not correctly received, the network device is at the nth The n+1 uplink scheduling information is sent to the terminal device in the +1 scheduling period, where the n+1th uplink scheduling information is used to schedule the terminal device to send the retransmission data of the nth uplink data in the (n+1)th scheduling period. The network device receives the retransmission data of the (n+1)th uplink data in the (n+1)th scheduling period, where the initial transmission start time of the uplink scheduling information is not earlier than the completion of the receiving of the uplink data. time.

With reference to the third aspect, or any one of the first or the second possible implementation manners of the third aspect, in the third possible implementation manner of the third aspect, the uplink scheduling information is the first one of the nth scheduling periods 6 matches or 7th symbols are carried.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the downlink feedback information is carried by the second symbol or the third symbol of the nth scheduling period.

With reference to the third aspect, or any one of the first to fourth possible implementation manners of the third aspect, in the fifth possible implementation manner of the third aspect, the downlink scheduling information and the uplink scheduling information are configured by the nth scheduling Different symbols are carried during the period.

In a fourth aspect, the present application further provides a data transmission method, including: receiving, by the terminal device, the nth uplink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the value of n is The terminal device sends the nth uplink data to the network device in the nth scheduling period according to the scheduling of the nth uplink scheduling information; the terminal device receives the indication information from the network device in the (n+1)th scheduling period, The indication information is used to indicate whether the nth uplink data is correctly received by the network device.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving, by the terminal device, the indication information from the network device in the (n+1)th scheduling period, that the terminal device is in the n+1th scheduling period The network device receives downlink feedback information, where the downlink feedback information is used to indicate whether uplink data in the nth scheduling period is correctly received by the network device.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the terminal device is in the (n+1)th scheduling And receiving the indication information from the network device, where the terminal device receives the (n+1)th uplink scheduling information from the network device in the (n+1)th scheduling period; the method further includes: the terminal device according to the nth +1 scheduling of uplink scheduling information, and transmitting retransmission data of the nth uplink data in the (n+1)th scheduling period.

In a fifth aspect, the present application further provides a network device, including a unit module for performing the method steps in the implementation manners of the first aspect or the third aspect. The receiving unit and the sending unit may be implemented by a transceiver module in the network device, or may be implemented by the processor to control the transceiver module.

In a sixth aspect, the present application further provides a terminal device, including a unit module for performing the method steps in the implementation manners of the second aspect or the fourth aspect. The receiving unit and the sending unit may be implemented by a transceiver in the terminal device, or may be implemented by the processor to control the transceiver.

In a seventh aspect, the present application further provides a wireless communication system, including the network device according to any one of the foregoing third aspect or the third aspect, or the foregoing fourth aspect or any implementation manner of the fourth aspect The terminal device.

The terminal device may send the uplink feedback information to the network device in the (n+1)th scheduling period, so that the data transmission delay caused by the timing delay of the feedback information may be reduced.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments will be briefly described below. Obviously, for those skilled in the art, without any creative labor, Other drawings can also be obtained from these figures.

1 is a schematic flowchart of an embodiment of a data transmission method according to the present application;

2 is a schematic flowchart of another embodiment of a data transmission method according to the present application;

3 is a schematic structural diagram of an embodiment of an uplink scheduling period of the present application;

4 is a schematic structural diagram of an embodiment of a downlink scheduling period of the present application;

FIG. 5 is a schematic structural diagram of an embodiment of a terminal device according to the present application;

6 is a schematic structural diagram of an embodiment of a network device according to the present application;

7 is a schematic structural diagram of another embodiment of a terminal device according to the present application;

FIG. 8 is a schematic structural diagram of another embodiment of a network device according to the present application.

detailed description

In order to facilitate the following description and clearly explain the present application, the following briefly describes the concepts that may be used in this application:

In various embodiments of the present application, the terminal device may be a device that provides voice and or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem. The terminal device can communicate with one or more core networks via a radio access network (RAN), and the terminal device can be a mobile terminal, such as a mobile phone (or "cellular" phone) and has a mobile terminal. The computer, for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and or data with the wireless access network. For example, personal communication service (PCS) telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (personal Digital assistant, PDA for short. The terminal device may also be referred to as a system, a subscriber unit (SU), a subscriber station (referred to as SS), a mobile station (MS), a remote station (RS), and an access station. Point (access point, AP for short), remote terminal (RT), access terminal (AT), user terminal (UT), user agent (UA) User equipment, or user equipment (UE). The network device may be a base station, an enhanced base station, or a relay having a scheduling function, or a device having a base station function, or the like. The base station may be an evolved Node B (eNB) in the LTE system, or may be a base station in other systems, which is not limited in this embodiment.

In various embodiments of the present application, the feedback information may include an acknowledgement (ACK) and a negative acknowledgment (NACK). The downlink feedback information in the nth scheduling period may be used to indicate whether the uplink data in the n-1th scheduling period is correctly received by the network device, and the uplink feedback information in the nth scheduling period may be used to indicate the n-1th scheduling Whether the downlink data in the period is correctly received by the terminal device. For example, if the terminal device correctly receives the downlink data sent by the network device in the nth scheduling period, the terminal device may send the uplink ACK in the n+1th scheduling period; if the network device fails to correctly receive the downlink sent in the nth scheduling period, Data, then the uplink NACK can be sent in the n+1th scheduling period. Similarly, if the network device correctly receives the uplink data sent by the terminal device in the nth scheduling period, the downlink ACK may be sent in the n+1th scheduling period; if the terminal device fails to receive correctly, it is sent in the nth scheduling period. The uplink data, then the downlink NACK can be sent in the n+1th scheduling period. Where n can be any An integer, usually a non-negative integer.

In various embodiments of the present application, the scheduling period refers to a time period in which one scheduling signaling sent by the base station takes effect. In LTE, one scheduling period is one scheduling period (1 ms), and in other wireless communication systems, such as 5G communication. In the system, one scheduling period may be one scheduling period (the length of the scheduling period may be 1 ms, 0.5 ms, 0.25 ms, etc.) or one time slot (one time slot is generally half a scheduling period, or a quarter scheduling period). , or one or several OFDM symbols, or a mini slot. For the sake of simplicity, the following description of the present application is described by taking the scheduling period as an example, but it should be noted that the values of the respective scheduling periods are included in the method described in the present application.

In various embodiments of the present application, the value of n may be any integer, and the nth scheduling period may be any scheduling period in the data transmission process between the terminal device and the network device, and the n+1th scheduling period may be After the nth scheduling period and adjacent to the nth scheduling period, the scheduling period. The order relationship between the nth scheduling period and the n+1th scheduling period can be as shown in FIG. 1. It should be noted that the terminal device has a timing advance (TA) compared with the nth scheduling period sent by the network device.

In various embodiments of the present application, the zth downlink scheduling information refers to downlink scheduling information transmitted in the zth scheduling period, and the zth downlink data refers to downlink data transmitted in the zth scheduling period; wherein, the zth downlink scheduling information For scheduling the zth downlink data or the z+a downlink data; the zth uplink scheduling information refers to uplink scheduling information transmitted during the zth scheduling period, and the zth uplink data refers to the transmission during the zth scheduling period. Upstream data; wherein the zth uplink scheduling information is used to schedule the z+1th uplink data or the z+a uplink data. The value of z may be n-1, n, n+1, n+2, etc., and the value of a may be a positive integer, such as 1 or 2.

1 is a schematic flowchart of an embodiment of a data transmission method according to the present application. As shown in FIG. 1, the method may include the following steps:

Step 101: The network device sends the nth downlink scheduling information to the terminal device in the nth scheduling period.

To implement scheduling of the nth downlink data, the network device needs to send the nth downlink scheduling information to the terminal device. The network device may send the nth downlink scheduling information in an n scheduling period, and correspondingly, the terminal device receives the nth downlink scheduling information in the nth scheduling period.

It should be noted that the network device may also send the nth downlink scheduling information to the terminal device in a certain scheduling period before the nth scheduling period, for example, the n-1th scheduling period or the n-2th scheduling period. Correspondingly, the terminal device receives the nth downlink scheduling information in a scheduling period before the nth scheduling period.

In order to enable the network device to retransmit the downlink data transmitted in the n-2th scheduling period in the nth scheduling period, In the n scheduling period, the sending start time of the downlink scheduling information is not earlier than the receiving completion time of the uplink feedback information in the nth scheduling period, and the sending start sending time of the downlink scheduling information and the receiving of the uplink feedback information The time interval between completion times is not less than the uplink feedback information processing delay.

The uplink feedback information processing delay includes: a delay generated by the network device demodulating and decoding the content of the uplink feedback information, where the network device generates downlink scheduling information according to the content of the uplink feedback information. The delay, and the network device, according to the downlink scheduling information, includes a generated delay of generating downlink transmission data. Generally, the uplink feedback information processing delay may be the sum of three processing delays included therein. Therefore, the network device can enable the downlink scheduling information to indicate whether the downlink data transmitted in the nth scheduling period is new downlink data or retransmission data of the downlink data in the n-2 scheduling period.

For example, the scheduling period is 125 microseconds, and each scheduling period includes 7 OFDM symbols, and each symbol is about 17 microseconds. When the uplink feedback information is carried by the second symbol in the nth scheduling period, The downlink scheduling information may be carried by the first symbol in the n+1th scheduling period.

Step 102: The network device sends the nth downlink data to the terminal device in the nth scheduling period.

During the nth scheduling period, the network device may send one or more of information or data such as the nth downlink data, downlink control signaling (DCI), or downlink feedback information. The downlink control signaling may include different information, and may be respectively carried by different downlink physical channels. For example, the downlink physical channel may include a downlink physical channel for carrying the nth downlink scheduling information, a downlink physical channel for carrying the nth uplink scheduling information, and the like. The downlink feedback information in the nth scheduling period may be used to indicate whether uplink data in the (n-1)th scheduling period is correctly received by the network device.

In order to adapt to different processing delay requirements and low delay requirements, including uplink data, downlink data, uplink feedback information, downlink feedback information, uplink scheduling information, and downlink scheduling information, the network device transmits downlink scheduling information in different symbols and Upstream scheduling information. For example, the scheduling period is 125 microseconds, and each scheduling period includes 7 OFDM symbols, and each symbol is about 17 microseconds. In the zth scheduling period, downlink scheduling information can be carried by the second symbol, and uplink. The scheduling information can then be carried by the sixth symbol.

Correspondingly, the terminal device may receive one or more of downlink data, downlink control signaling, or downlink feedback information or the like in the nth scheduling period.

Step 103: The terminal device sends uplink feedback information to the network device in the n+1th scheduling period.

The uplink feedback information in the n+1th scheduling period may be used to indicate whether the downlink data carried in the nth scheduling period is correctly received by the terminal device. For example, if the network device is correctly received, it is sent during the nth scheduling period. If the downlink data is sent, the terminal device may send the uplink ACK in the (n+1)th scheduling period; if the downlink data sent by the network device in the nth scheduling period is not correctly received, the terminal device may send the uplink in the (n+1)th scheduling period. NACK.

Due to the presence of the TA, the start time of the n+1th scheduling period is earlier than the time of all the reception completion of the nth scheduling period, and the uplink feedback information in the n+1th scheduling period is used to indicate the Whether the downlink data carried in the nth scheduling period is correctly received by the terminal device, and therefore, the initial sending time of the uplink feedback information in the (n+1)th scheduling period needs to be earlier than the first in the nth scheduling period. n The completion time of the downlink data reception. Generally, the time interval between the initial transmission time of the uplink feedback information and the transmission completion time of the nth downlink data to the terminal in the n+1th scheduling period needs to be not less than the downlink generated by the terminal device processing the nth downlink data. Data processing delay.

The downlink data processing delay generated by processing the nth downlink data may include: a delay generated by the terminal device demodulating and decoding the downlink data, and a generated by the terminal device by generating the uplink feedback information Delay. Normally, the downlink data processing delay can be the sum of the two delays it contains.

The uplink feedback information may be carried by any one or more symbols in the (n+1)th scheduling period. In order to enable the network device to retransmit the uplink data as soon as possible, the uplink feedback information may be carried by a symbol that is as far as possible in the time domain in the n+1th scheduling period, that is, the nth downlink data arrives at the terminal to complete the transmission. The latest uplink OFDM symbol bearer after the downlink data processing delay generated by the terminal device processing the nth downlink data is added.

The scheduling period is 125 microseconds, and each scheduling period includes 7 OFDM symbols, and each symbol is about 17 microseconds. If the TA is 10 milliseconds and the downlink data processing delay is 5 milliseconds, as shown in FIG. 2, the uplink feedback information may be generally carried by the second symbol or the third symbol in the n+1th scheduling period. . It should be noted that if the TA is larger or the downlink data processing delay is larger, the uplink feedback information may also be carried by other symbols after the third symbol in the n+1th scheduling period.

With the sending of the uplink feedback information provided by the embodiment, the terminal device can send the feedback information for the nth downlink data in the (n+1)th scheduling period, so that the downlink data transmission caused by the transmission delay of the feedback information can be shortened. Delay.

After receiving the uplink feedback information, the network device may determine, according to the feedback information, whether the nth downlink data needs to be retransmitted. If the uplink feedback information is an uplink acknowledgement, it indicates that the nth downlink data has been correctly received by the terminal device, so the network device may be in a subsequent scheduling period. Transmitting the other downlink data; if the uplink feedback information is an uplink acknowledgement, it is stated that the nth downlink data is not correctly received by the terminal device, and therefore the network device needs to retransmit the nth downlink data in a subsequent scheduling period. . Therefore, after step 103, the method may further include:

Step 104: If the terminal device does not correctly receive the nth downlink data, the network device sends the retransmission data of the nth downlink data to the terminal device in the n+2th scheduling period.

If the uplink feedback information sent by the terminal device in the (n+1)th scheduling period is a NACK, the network device may also perform retransmission of the nth downlink data in the n+2th scheduling period, that is, the network device sends in the n+2 scheduling period. The downlink data is the retransmission data of the nth downlink data.

In order to enable the network device to perform retransmission of the nth downlink data in the n+2th scheduling period, the downlink data transmission start time in the n+2th scheduling period needs to be earlier than the uplink feedback information transmission completion time. And the time interval between the start time of the downlink data transmission in the n+2th scheduling period and the completion time of the uplink feedback information transmission is generally required to be longer than the uplink feedback information processing delay of the network device receiving the n+1 scheduling period, and retransmitting the data. The delay of the retransmission data includes the delay of generating the downlink scheduling information by the network device, and the delay of generating the encoded downlink retransmission data according to the downlink scheduling.

The uplink feedback information processing delay includes: a delay generated by the network device demodulating and decoding the content of the uplink feedback information, where the network device generates downlink scheduling information according to the content of the uplink feedback information. The delay, and the network device, according to the downlink scheduling information, includes a generated delay of generating downlink transmission data. Generally, the uplink feedback information processing delay may be the sum of three processing delays included therein. Therefore, the network device can be configured to indicate, according to the downlink scheduling information, whether the downlink data transmitted in the (n+1)th scheduling period is new downlink data or retransmission data of the downlink data in the n-1 scheduling period.

In order to provide more processing delay to the network device, before the downlink data transmission start time in the scheduling period, the downlink reference signal for demodulation is sent, for example, the downlink reference signal is sent in the first x symbols, and the downlink scheduling information is used. It can be transmitted in the first symbol or the first y symbols, where x is greater than or equal to 1, and y is greater than or equal to x.

With the retransmission mechanism provided in this embodiment, the terminal device can receive the retransmission data for the erroneous downlink data in the nth scheduling period in the n+2 scheduling period, thereby shortening the data transmission caused by waiting for retransmission data. Delay.

Since the network device and the terminal device need to perform uplink data transmission in addition to downlink data transmission, the present application also provides another data transmission method to shorten the delay caused by the transmission delay of the feedback information. Uplink data transmission delay.

2 is a schematic flowchart of another embodiment of a data transmission method according to the present application. As shown in FIG. 2, the method may include the following steps:

Step 201: The network device sends the nth uplink scheduling information to the terminal device in the nth scheduling period.

Generally, the time interval between the start of the uplink scheduling information in the nth scheduling period and the transmission completion time of the downlink feedback information in the n-1th scheduling period needs to be not less than the delay caused by the uplink scheduling performed by the network device. That is, the time interval between the initial transmission time of the uplink scheduling information transmission in the nth scheduling period and the reception completion time of the uplink data in the n-1th scheduling period is not less than the sum of the uplink data processing delay and the uplink scheduling delay.

The uplink scheduling delay includes: a delay generated by the network device to generate scheduling information according to a demodulation and decoding result of the n-1th uplink data, and generating the nth uplink according to the scheduling information. The delay caused by scheduling information. Generally, the uplink scheduling delay may be the sum of two delays it contains.

The sum of the data processing delay and the uplink scheduling delay is 85 milliseconds, and the scheduling period is 125 microseconds. Each scheduling period includes 7 OFDM symbols, and each symbol is about 17 microseconds. The information may be carried by the sixth or seventh symbol in the nth scheduling period.

In order to facilitate the network device to flexibly select the time for sending the uplink scheduling information, the terminal device may also use the first k symbols of the nth scheduling period to send the uplink reference signal. At this time, the uplink feedback information of the nth scheduling period is not earlier than the uplink. Preferably, the uplink feedback information is carried by one symbol after the uplink reference signal. For example, when the second one of the nth scheduling period is used for transmitting the uplink data, the first symbol of the nth scheduling period may be used to carry the uplink reference signal, and the nth Any one or more of the 5th, 6th, and 7th symbols in the scheduling period may be used to carry the uplink scheduling information.

Step 202: The terminal device sends, according to the scheduling of the nth uplink scheduling information, the nth uplink data that is sent in the nth scheduling period.

After receiving the nth uplink scheduling information, the terminal device may upload the nth uplink data in the nth scheduling period according to the scheduling of the nth uplink scheduling information;

The initial transmission time of the uplink data in the nth scheduling period is not earlier than the reception completion time of the uplink scheduling information in the nth scheduling period. Generally, the time interval between the initial transmission time of the uplink data and the reception completion time of the uplink scheduling information is not less than the uplink scheduling information processing delay of the uplink scheduling information. The uplink scheduling information processing delay may include: a delay generated by the terminal demodulating and decoding the uplink scheduling information, where the terminal device parses the decoding result of the uplink scheduling information to generate an analysis result And a delay generated by the terminal device to generate the uplink transmission data according to the parsing result. Usually The uplink scheduling information processing delay may be the sum of the three delays included in the foregoing.

For example, if the uplink scheduling information is carried by the sixth symbol of the nth scheduling period, the terminal device may send uplink data in any symbol of the nth scheduling period according to the scheduling of the uplink scheduling information. The uplink data may occupy only one symbol or may occupy more symbols.

In order to facilitate the network device to flexibly select the time for sending the uplink scheduling information, the terminal device may also use the first k symbols of the nth scheduling period to send the uplink reference signal. At this time, the uplink feedback information of the nth scheduling period is not earlier than the uplink. Preferably, the uplink feedback information is carried by one symbol after the uplink reference signal. For example, when the second one of the nth scheduling period is used for transmitting the uplink data, the first symbol of the nth scheduling period may be used to carry the uplink reference signal, and the nth Any one or more of the 5th, 6th, and 7th symbols in the scheduling period may be used to carry the uplink scheduling information.

Step 203: The network device sends indication information in the nth scheduling period, where the indication information is used to indicate whether the nth uplink data is correctly received by the network device.

The downlink feedback information may be used to indicate whether uplink data carried in the nth scheduling period is correctly received by the network device. For example, if the network device correctly receives the uplink data sent by the terminal device in the nth scheduling period, the downlink ACK may be sent in the nth scheduling period; if the uplink data sent by the terminal device in the nth scheduling period is not correctly received, A downlink NACK is transmitted during the nth scheduling period.

In order to enable the network device to send the downlink feedback information in the nth scheduling period, the initial sending time of the downlink feedback information in the nth scheduling period needs to be earlier than the receiving completion time of the uplink data in the n-1th scheduling period. .

Generally, the time interval between the initial transmission time of the downlink feedback information in the nth scheduling period and the reception completion time of the uplink data in the nth scheduling period may be not less than the uplink data processing delay. The uplink data processing delay includes: a delay generated by the network device demodulating and decoding the uplink data, and a delay generated by the network device generating the uplink feedback information. Typically, the uplink data processing delay is the sum of the two delays it contains.

The network device may use the nth, because the terminal device may send the uplink data in the last symbol of the nth scheduling period, so that the start sending time of the downlink feedback information is not earlier than the receiving completion time of the uplink data. The downlink feedback information is transmitted by any one of the second symbol to the seventh symbol in the scheduling period. In order to enable the terminal device to retransmit the uplink data in the nth scheduling period, the symbol used to carry the downlink feedback information in the nth scheduling period may be as far as possible in the time domain position. For example, the second symbol bearer in the nth scheduling period can be used. The downlink feedback information.

It is also possible to indicate whether the uplink data in the nth scheduling period is correctly received by the network device by sending the (n+1) uplink scheduling information to the terminal device.

The (n+1)th uplink scheduling information is used to schedule uplink data transmission in the n+1th scheduling period of the terminal device. If the network device fails to correctly receive the uplink data sent by the terminal device in the nth scheduling period, the (n+1)th uplink scheduling information is used to schedule the terminal device to send the nth uplink data in the (n+1)th scheduling period. Reselecting data; if the network device has correctly received the uplink data sent by the terminal device in the nth scheduling period, the (n+1)th uplink scheduling information is used to schedule the terminal device to send in the (n+1)th scheduling period. Reselection data for other upstream data.

FIG. 3 is a schematic structural diagram of an uplink scheduling period of the present application. As shown in FIG. 3, the first symbol of the scheduling period may be used to carry an uplink reference signal, and the second 2 symbol of the scheduling period may be used to carry the uplink feedback information, where the third period of the scheduling period is The seventh symbol can be used to carry upstream data or other information.

FIG. 4 is a schematic structural diagram of a downlink scheduling period of the present application. As shown in FIG. 4, the first symbol of the scheduling period may carry downlink scheduling information, and the second symbol of the scheduling period may be used to carry downlink feedback information, and the sixth symbol of the scheduling period may be used. The uplink scheduling information is carried, and other symbols in the scheduling period may be used to carry downlink data or other information.

Referring to FIG. 5, it is a schematic structural diagram of an embodiment of a terminal device according to the present application. The terminal device can be used to perform the data transmission method in the foregoing related embodiment of FIG. 1.

As shown in FIG. 5, the terminal device may include: a receiving unit 501 and a sending unit 502. The wireless communication device may include other unit modules, such as a processing unit, in addition to the receiving unit 501 and the sending unit 502.

In an embodiment, the receiving unit is configured to receive the nth downlink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; according to the nth downlink scheduling information Dispatching, in the nth scheduling period, receiving the nth downlink data from the network device; the sending unit, configured to send the uplink feedback information to the network device in the (n+1)th scheduling period, where the uplink feedback information is used to indicate the Whether the nth downlink data is correctly received by the terminal device; the sending unit is further configured to: if the uplink feedback information is used to indicate that the nth downlink data is not correctly received by the terminal device, at the n+th Receiving, in the scheduling period, the retransmission data of the nth downlink data, where the initial transmission time of the uplink feedback information is not earlier than the reception completion time of the downlink data; and the downlink data of the n+2 scheduling period The initial transmission time is not earlier than the uplink Feed information transmission completion time.

In another embodiment, the receiving unit is configured to receive the nth uplink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; according to the nth uplink Dispatching the scheduling information, in the nth scheduling period, sending the nth scheduling period uplink data to the network device; the sending unit, configured to receive the indication information from the network device in the (n+1)th scheduling period, where the indication information is used to indicate the Whether the uplink data of the nth scheduling period is correctly received by the network device.

Optionally, the receiving unit is further configured to receive downlink feedback information from the network device in an (n+1)th scheduling period, where the downlink feedback information is used to indicate whether uplink data in the nth scheduling period is The network device receives it correctly.

Optionally, the receiving unit is further configured to receive the (n+1)th uplink scheduling information from the network device in the (n+1)th scheduling period; the sending unit is further configured to perform, according to the (n+1)th uplink scheduling The scheduling of the information is to transmit the retransmission data of the nth uplink data in the (n+1)th scheduling period.

FIG. 6 is a schematic structural diagram of an embodiment of a network device according to the present application. The terminal device may be configured to perform the data transmission method in the foregoing related embodiment of FIG. 2.

As shown in FIG. 6, the network device may include: a receiving unit 601 and a sending unit 602. The wireless communications device may include other unit modules, such as a processing unit, in addition to the receiving unit 601 and the sending unit 602.

In an embodiment, the sending unit is configured to send the nth downlink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the nth downlink scheduling information is used to schedule the transmission of the nth downlink data. The nth data is downlink data in the nth scheduling period, an integer value of n; the nth downlink data is sent to the terminal device in the nth scheduling period; and the receiving unit is configured to be in the n+1th scheduling period And receiving, by the terminal device, the uplink feedback information, where the uplink feedback information is used to indicate whether the terminal is the device that correctly receives the nth downlink data, and the sending unit is further configured to: if the terminal device is not correct Receiving the nth downlink data, transmitting, in the n+2th scheduling period, the retransmission data of the nth downlink data to the terminal device, where the initial transmission time of the retransmission data is not earlier than the n+th The receiving completion time of the uplink feedback information in the scheduling period.

In another embodiment, the sending unit is configured to send the nth uplink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; the receiving unit is used in the Receiving, by the terminal device, the nth uplink data scheduled by the nth uplink scheduling information; the sending The unit is further configured to send the indication information in the (n+1)th scheduling period, where the indication information is used to indicate whether the nth uplink data is correctly received by the network device, where the sending start time of the indication information Not earlier than the nth uplink data reception completion time.

Optionally, the sending unit is configured to send downlink feedback information to the terminal device in the (n+1)th scheduling period, where the downlink feedback information is used to indicate whether the uplink data in the nth scheduling period is used by the network device. Correctly receiving; wherein, the initial sending time of the downlink feedback information is not earlier than the receiving completion time of the uplink data.

Optionally, the sending unit is configured to: if the nth uplink data is not correctly received, send, by the network device, the n+1 uplink scheduling information to the terminal device in the (n+1)th scheduling period, where The n+1 uplink scheduling information is used to schedule the terminal device to send the retransmission data of the nth uplink data in the (n+1)th scheduling period; the receiving unit is further configured to receive the location in the (n+1)th scheduling period. And a retransmission data of the (n+1)th uplink data, where the initial transmission time of the uplink scheduling information is not earlier than the reception completion time of the uplink data.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of an embodiment of a terminal device according to the present application. The terminal device may be the terminal device in any of the foregoing embodiments for implementing the method steps in the foregoing embodiments.

As shown in FIG. 7, the network side device may include a processor 701, a memory 702, and a transceiver module 703. The transceiver module may include components such as a receiver 7031, a transmitter 7032, and an antenna 7033. The network side device may further include more or less components, or combine some components, or different component arrangements, which is not limited in this application.

The processor 701 is a control center of the terminal device, and connects various parts of the entire terminal device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 702, and calling data stored in the memory, To perform various functions of the terminal device and/or process data. The processor 701 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs that have the same function or different functions. For example, the processor may include only a central processing unit (CPU), or may be a GPU, a digital signal processor (DSP), and a control chip in the transceiver module (for example, a baseband chip). )The combination. In the embodiment of the present application, the CPU may be a single operation core, and may also include a multi-operation core.

The transceiver module 703 is configured to establish a communication channel, and enable the terminal device to connect to the receiving device through the communication channel, thereby implementing data transmission between the terminal devices. The transceiver module may include a wireless local area network (WLAN) module, a Bluetooth module, a baseband module, and the like, and a radio frequency (RF) circuit corresponding to the communication module. For wireless local area network communication, Bluetooth communication, infrared communication, and/or cellular communication system communication, such as wideband code division multiple access (WCDMA) and/or high speed downlink access (high speed downlink) Packet access, referred to as HSDPA). The transceiver module is configured to control communication of components in the terminal device and can support direct memory access.

In various implementations of the present application, the various transceiver modules in the transceiver module 703 generally appear in the form of an integrated circuit chip, and can be selectively combined without including all transceiver modules and corresponding Antenna group. For example, the transceiver module can include only a baseband chip, a radio frequency chip, and a corresponding antenna to provide communication functionality in a cellular communication system. The terminal device can be connected to a cellular network or the internet via a wireless communication connection established by the transceiver module, such as wireless local area network access or WCDMA access. In some optional implementations of the present application, a communication module, such as a baseband module, in the transceiver module may be integrated into the processor, typically an APQ+MDM series platform such as that provided by Qualcomm. The radio frequency circuit is used for receiving and transmitting signals during information transmission and reception or during a call. For example, after the downlink information of the network side device is received, it is processed by the processor; in addition, the designed uplink data is sent to the network side device. Generally, the radio frequency circuit includes well-known circuits for performing these functions, including but not limited to an antenna system, a radio frequency transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a codec. (codec) chipset, Subscriber Identity Module (SIM) card, memory, etc. In addition, the RF circuit can communicate with the network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to a global system of mobile communication (GSM), a general packet radio service (gprs), and code division multiple access. (code division multiple access, CDMA for short), wideband code division multiple access (WCDMA), high speed uplink packet access (HSUPA), long-term evolution (long) Term evolution (LTE), e-mail, short messaging service (SMS), etc.

In the embodiment of the present application, the function to be implemented by the receiving unit 501 may be implemented by the transceiver module 703 of the terminal device, or implemented by the transceiver module 703 controlled by the processor 701; It may be implemented by the transceiver module 703 of the terminal device, or may also be implemented by the transceiver module 703 controlled by the processor 401; the function to be implemented by the processing unit may be implemented by the processor 701.

FIG. 8 is a schematic structural diagram of an embodiment of a network side device according to the present application. The network side device may be the network side device in any of the foregoing embodiments, and is used to implement the method steps in the foregoing embodiments.

The wireless communication device may be composed of a processor 801, a memory 802, a transceiver 803, and the like.

The processor 801 is a control center of the network side device, and connects various parts of the entire network side device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory. To perform various functions of the network side device and/or process data. The processor may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and an NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination.

The memory 802 may include a volatile memory, such as a random access memory (RAM); and may also include a non-volatile memory, such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory may also include a combination of the above types of memory. A program or code may be stored in the memory, and the processor in the network element may implement the function of the network element by executing the program or code.

The transceiver 803 can be configured to receive or transmit data, and the transceiver can transmit data to a terminal device or other network side device under control of the processor; the transceiver receives under control of the processor Data sent by a terminal device or other network-side device.

In the embodiment of the present application, the transceiver may be used to implement the method steps for receiving the first transmission request or sending the first system message in the foregoing embodiment. The function to be implemented by the receiving unit 601 may be implemented by the transceiver 803 of the terminal device or by the transceiver 803 controlled by the processor 801; the function to be implemented by the sending unit 602 may also be performed by the terminal device. The transceiver 803 is implemented, or may be implemented by the transceiver 803 controlled by the processor 801; the functions to be implemented by the processing unit 602 may be implemented by the processor 801.

In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in each embodiment of the data transmission method provided by the application. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Those skilled in the art can clearly understand that the technology in the embodiments of the present application can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present application may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application or portions of the embodiments.

The same and similar parts between the various embodiments in this specification can be referred to each other. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.

The embodiments of the present application described above are not intended to limit the scope of the present application.

Claims (32)

A data transmission method, comprising: The network device sends the nth downlink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the nth downlink scheduling information is used to schedule transmission of the nth downlink data, where the nth data is n downlink data in the scheduling period, the integer value of n; Sending, by the network device, the nth downlink data to the terminal device in an nth scheduling period; The network device receives the uplink feedback information from the terminal device in the (n+1)th scheduling period, where the uplink feedback information is used to indicate whether the terminal is the device that correctly receives the nth downlink data; If the terminal device does not correctly receive the nth downlink data, the network device sends the retransmission data of the nth downlink data to the terminal device in the n+2 scheduling period; The initial transmission time of the uplink feedback information is not earlier than the reception completion time of the downlink data; the initial transmission time of the retransmission data is not earlier than the uplink feedback information in the (n+1)th scheduling period. The reception completion time. The method according to claim 1, wherein said nth downlink scheduling information is carried by a first symbol in said nth scheduling period. The method according to claim 1 or 2, wherein the first k symbols of the nth scheduling period are used to carry a downlink reference signal, and k is an integer having a value of not less than 1. A data transmission method, comprising: The terminal device receives the nth downlink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; Receiving, by the terminal device, the nth downlink data from the network device in the nth scheduling period according to the scheduling of the nth downlink scheduling information; The terminal device sends uplink feedback information to the network device in the (n+1)th scheduling period, where the uplink feedback information is used to indicate whether the nth downlink data is correctly received by the terminal device; If the uplink feedback information is used to indicate that the nth downlink data is not correctly received by the terminal device, the terminal device receives retransmission data of the nth downlink data in an n+2th scheduling period; The initial sending start time of the uplink feedback information is not earlier than the receiving completion time of the downlink data; the initial sending start time of the downlink data of the n+2th scheduling period is not earlier than the uplink Feedback The moment when the information transmission is completed. The method according to claim 4, wherein the first k symbols of the n+1th scheduling period are used to carry an uplink reference signal, and k is an integer whose value is not less than 1. The method according to claim 5 or 6, wherein the uplink feedback information is carried by a second symbol or a third symbol of the (n+1)th scheduling period. A data transmission method, comprising: The network device sends the nth uplink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; Receiving, by the network device, the nth uplink data scheduled by the nth uplink scheduling information, in the nth scheduling period; The indication information sent by the network device in the (n+1)th scheduling period, the indication information is used to indicate whether the nth uplink data is correctly received by the network device, where the sending start time of the indication information is not It is earlier than the nth uplink data reception completion time. The method of claim 7, wherein the transmitting, by the network device, the indication information to the terminal device comprises: The network device sends downlink feedback information to the terminal device in the (n+1)th scheduling period, where the downlink feedback information is used to indicate whether uplink data in the nth scheduling period is correctly received by the network device; The initial sending start time of the downlink feedback information is not earlier than the receiving completion time of the uplink data. The method of claim 7, wherein the transmitting, by the network device, the indication information to the terminal device comprises: If the nth uplink data is not correctly received, the network device sends the n+1 uplink scheduling information to the terminal device in the (n+1)th scheduling period, where the (n+1)th uplink scheduling information is used for scheduling Transmitting, by the terminal device, retransmission data of the nth uplink data in an (n+1)th scheduling period; Receiving, by the network device, retransmission data of the (n+1)th uplink data in an (n+1)th scheduling period; The initial sending start time of the uplink scheduling information is not earlier than the receiving of the uplink data. Into the moment. The method according to any one of claims 7 to 9, wherein the uplink scheduling information is carried by a sixth or seventh symbol in the nth scheduling period. The method according to claim 8, wherein the downlink feedback information is carried by a second symbol or a third symbol of the nth scheduling period. The method according to any one of claims 7 to 11, wherein the downlink scheduling information and the uplink scheduling information are carried by different symbols in the nth scheduling period. A data transmission method, comprising: The terminal device receives the nth uplink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; Transmitting, by the terminal device, the nth uplink data to the network device in the nth scheduling period according to the scheduling of the nth uplink scheduling information; The terminal device receives the indication information from the network device in the (n+1)th scheduling period, where the indication information is used to indicate whether the nth uplink data is correctly received by the network device. The method according to claim 13, wherein the receiving, by the terminal device, the indication information from the network device in the (n+1)th scheduling period comprises: The terminal device receives downlink feedback information from the network device in the (n+1)th scheduling period, where the downlink feedback information is used to indicate whether uplink data in the nth scheduling period is correctly received by the network device. The method according to claim 13, wherein the receiving, by the terminal device, the indication information from the network device in the (n+1)th scheduling period comprises: Receiving, by the terminal device, the n+1 uplink scheduling information from the network device in the (n+1)th scheduling period; The method further includes: And the terminal device sends the retransmission data of the nth uplink data in the (n+1)th scheduling period according to the scheduling of the (n+1)th uplink scheduling information. A network device, comprising: a sending unit, configured to send an nth downlink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the nth downlink scheduling information is used to schedule transmission of the nth downlink data, where the nth The data is the downlink data in the nth scheduling period, and the value of n is an integer; the nth downlink data is sent to the terminal device in the nth scheduling period; a receiving unit, configured to receive uplink feedback information from the terminal device in the (n+1)th scheduling period, where the uplink feedback information is used to indicate whether the terminal is the device that correctly receives the nth downlink data; The sending unit is further configured to: if the terminal device does not correctly receive the nth downlink data, send retransmission data of the nth downlink data to the terminal device in an n+2 scheduling period; The initial transmission time of the retransmission data is not earlier than the reception completion time of the uplink feedback information in the (n+1)th scheduling period. The network device according to claim 16, wherein said nth downlink scheduling information is carried by a first symbol in said nth scheduling period. The network device according to claim 16 or 17, wherein the first k symbols of the nth scheduling period are used to carry a downlink reference signal, and k is an integer having a value of not less than 1. A terminal device, comprising: a receiving unit, configured to receive an nth downlink scheduling information from the network device, or an integer value of n, in the nth scheduling period or before the nth scheduling period, and according to the scheduling of the nth downlink scheduling information, at the nth Receiving the nth downlink data from the network device during the scheduling period; a sending unit, configured to send uplink feedback information to the network device in the (n+1)th scheduling period, where the uplink feedback information is used to indicate whether the nth downlink data is correctly received by the terminal device; The sending unit is further configured to: if the uplink feedback information is used to indicate that the nth downlink data is not correctly received by the terminal device, receive retransmission of the nth downlink data in an n+2th scheduling period. Data, wherein the initial transmission time of the uplink feedback information is not earlier than the reception completion time of the downlink data; the initial transmission time of the downlink data of the n+2th scheduling period is not earlier than the uplink feedback information. The transfer completion time. The terminal device according to claim 19, wherein said nth downlink scheduling information is carried by a first symbol in said nth scheduling period. The terminal device according to claim 19 or 20, wherein the first k symbols of the nth scheduling period are used to carry a downlink reference signal, and k is an integer whose value is not less than 1. A network device, comprising: a sending unit, configured to send the nth uplink scheduling information to the terminal device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; a receiving unit, configured to receive, by the terminal device, an nth uplink data that is scheduled by the nth uplink scheduling information; The sending unit is further configured to use the indication information that is sent in the (n+1)th scheduling period, where the indication information is used to indicate whether the nth uplink data is correctly received by the network device, where the indication information is sent. The start time is not earlier than the nth uplink data reception completion time. A network device according to claim 18, wherein The sending unit is configured to send downlink feedback information to the terminal device in the (n+1)th scheduling period, where the downlink feedback information is used to indicate whether uplink data in the nth scheduling period is correctly received by the network device. The initial transmission time of the downlink feedback information is not earlier than the reception completion time of the uplink data. A network device according to claim 18, wherein The sending unit is configured to: if the nth uplink data is not correctly received, the network device sends the n+1 uplink scheduling information to the terminal device in the (n+1)th scheduling period, where the nth The +1 uplink scheduling information is used to schedule the terminal device to send the retransmission data of the nth uplink data in the (n+1)th scheduling period; The receiving unit is further configured to receive the retransmission data of the (n+1)th uplink data in the (n+1)th scheduling period, where the initial sending time of the uplink scheduling information is not earlier than the receiving of the uplink data. Completion time. The network device according to any one of claims 22 to 24, wherein the uplink scheduling information is carried by a sixth or seventh symbol in the nth scheduling period. The method of claim 25, wherein said downlink feedback information is said The second symbol or the third symbol of the n scheduling period is carried. The network device according to any one of claims 22 to 26, wherein the downlink scheduling information and the uplink scheduling information are carried by different symbols in the nth scheduling period. A terminal device, comprising: a receiving unit, configured to receive the nth uplink scheduling information from the network device in the nth scheduling period or before the nth scheduling period, where the value of n is an integer; according to the scheduling of the nth uplink scheduling information, Sending the nth scheduling period uplink data to the network device in the n scheduling period; And a sending unit, configured to receive, by the network device, the indication information, where the indication information is used to indicate whether the uplink data of the nth scheduling period is correctly received by the network device. The terminal device according to claim 28, characterized in that The receiving unit is further configured to receive downlink feedback information from the network device in an (n+1)th scheduling period, where the downlink feedback information is used to indicate whether uplink data in the nth scheduling period is correctly received by the network device. . The terminal device according to claim 28, characterized in that The receiving unit is further configured to receive the n+1 uplink scheduling information from the network device in the (n+1)th scheduling period; The sending unit is further configured to send the retransmission data of the nth uplink data in the (n+1)th scheduling period according to the scheduling of the (n+1)th uplink scheduling information. A wireless communication system, comprising the network device according to any one of claims 16 to 18 or the terminal device according to any one of claims 19 to 21. A wireless communication system, comprising the network device according to any one of claims 22 to 27 or the terminal device according to any one of claims 28 to 30.

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