RU2791874C2 - Method and device for information sending, method and device for information reception, base station, terminal, and communication system - Google Patents

Abstract

FIELD: communication.

SUBSTANCE: base station sends uplink transmission configuration information to a terminal. Uplink transmission configuration information includes uplink channel resource configuration information and downlink control channel search space configuration information. Information carried in the downlink control channel of the downlink control channel search space includes downlink control information (DCI). By means of indication of uplink transmission configuration information, information transmission can be gradually implemented regardless whether the terminal is in RRC-CONNECT state or RRC-IDLE state. When the terminal is in RRC-IDLE state, data transmission can be performed without state switching.

EFFECT: reduction in consumption of energy and terminal resources.

8 cl, 12 dwg

Description

This application claims priority to Chinese Patent Application No. 201910054154.1 filed with CNIPA on January 21, 2019, the disclosure of which is incorporated herein by reference in its entirety.

Technical field

The present application relates to the field of communication and, in particular, to a method and device for sending information, a method and device for receiving information, a base station, a terminal, and a communication system.

Prior Art

Currently, the terminal needs to transition to the radio resource control connection state (RRC-CONNECT) from the radio resource control idle state (RRC-IDLE) before sending or receiving data. However, system resources will be consumed and the power consumption of the terminal will increase when the terminal enters the RRC-CONNECT state from the RRC-IDLE state. Therefore, there is a need to provide a new data transmission method to solve this problem.

Brief description of the essence of the invention

The information sending method and apparatus, the information receiving method and apparatus, the base station, the terminal, and the communication system in the embodiments of the present disclosure mainly provide a new information transmission solution for enabling the terminal to maintain uplink data transmission in the RRC-IDLE state to solve the above-described technical problem.

In order to solve the above technical problem, an embodiment of the present disclosure provides a method for sending information. The method includes the steps described below.

The uplink transmission configuration information is sent to the terminal, where the uplink transmission configuration information includes at least one of: uplink channel resource configuration information and downlink control channel search space configuration information. Meanwhile, the information carried in the downlink control channel of the downlink control channel search space includes downlink control information (DCI).

An embodiment of the present disclosure further provides a method for receiving information. The method includes the steps described below.

Uplink transmission configuration information sent by the base station is received, where the uplink transmission configuration information includes at least one of: uplink channel resource configuration information and downlink control channel search space configuration information. Meanwhile, the information carried in the downlink control channel of the downlink control channel search space includes DCI.

An embodiment of the present disclosure further provides an information sending device. The device includes a sending module.

The sending module is configured to send uplink transmission configuration information to the terminal. The uplink transmission configuration information includes at least one of: uplink channel resource configuration information and downlink control channel search space configuration information. Meanwhile, the information carried in the downlink control channel of the downlink control channel search space includes DCI.

An embodiment of the present disclosure further provides an information receiving device. The device includes a receiving module.

The receiving module is configured to receive uplink transmission configuration information sent by the base station. The uplink transmission configuration information includes at least one of: uplink channel resource configuration information and downlink control channel search space configuration information. Meanwhile, the information carried in the downlink control channel of the downlink control channel search space includes DCI.

An embodiment of the present disclosure further provides a base station. The base station includes a first processor, a first memory, and a first communication bus.

The first communication bus is configured to provide connection and communication between the first processor and the first memory.

The first processor is configured to execute one or more programs stored in memory to implement the steps of the information sending method described above.

An embodiment of the present disclosure further provides a terminal. The terminal includes a second processor, a second memory, and a second communication bus.

The second communication bus is configured to provide connection and communication between the second processor and the second memory.

The second processor is configured to execute one or more programs stored in the memory to implement the information receiving method steps described above.

An embodiment of the present disclosure further provides a communication system. The communication system includes a base station as described above and at least one terminal as described above.

An embodiment of the present disclosure further provides a readable storage medium. The storage medium stores the information sending program and/or the information receiving program. The information sending program is executed by one or more processors to implement the steps in the information sending method described above. The information receiving program is executed by one or more processors to implement the steps in the information receiving method described above.

The present application provides the useful results described below.

According to the information sending method and apparatus, the information receiving method and apparatus, the base station, the terminal, and the communication system in the embodiments of the present disclosure, the base station sends uplink transmission configuration information to the terminal. The uplink transmission configuration information includes uplink channel resource configuration information and/or downlink control channel search space configuration information. The information carried in the downlink control channel of the downlink control channel search space includes DCI. The uplink channel resource configuration information in the uplink transmission configuration information sent by the base station may indicate an uplink channel to the terminal to help the terminal implement the uplink transmission. Moreover, the downlink control channel search space configuration information in the uplink transmission configuration information can indicate the downlink control channel search space to the terminal, so that the terminal can detect the DCI sent by the base station and downlink transmission between the base station is realized. and terminal. Therefore, by indicating the uplink transmission configuration information, the transmission of information can be seamlessly realized regardless of whether the terminal is in the RRC-CONNECT state or the RRC-IDLE state. Naturally, when the terminal is in the RRC-IDLE state, data transmission can be completed without state switching, thereby reducing the power consumption and resource consumption caused by the terminal state switching, which is beneficial for achieving the optimal resource configuration of the terminal and improves the user experience on the terminal side.

Other features of the present application and corresponding useful results are set forth in the description below, and it should be understood that at least part of the useful results will become apparent from the description of the present application.

Brief description of the drawings

Fig. 1 is a flowchart showing interaction between a base station and a terminal in an information transmission decision according to Embodiment 1 of the present disclosure;

Fig. 2 is a flowchart showing another interaction between a base station and a terminal in an information transmission decision according to Embodiment 1 of the present disclosure;

Fig. 3 is a flowchart showing another interaction between a base station and a terminal in an information transmission decision according to Embodiment 1 of the present disclosure;

Fig. 4 is a block diagram of an information sending apparatus according to Embodiment 2 of the present disclosure;

Fig. 5 is a block diagram of an information receiving apparatus according to Embodiment 2 of the present disclosure;

Fig. 6 is a diagram showing an uplink channel resource indicated by uplink channel resource configuration information according to Embodiment 3 of the present disclosure;

Fig. 7 is a diagram showing a relationship between a search space indicated by the downlink control channel search space configuration information and an uplink channel resource indicated by the uplink channel resource configuration information, according to Embodiment 3 of the present disclosure;

Fig. 8 is a diagram showing a positional relationship between a paging (paging) occurrence in a paging transmission window and a send capability in the paging space shown in Example 1 according to Embodiment 3 of the present disclosure;

Fig. 9 is a diagram showing a positional relationship between a paging occurrence in a paging transmission window and a send capability in the search space shown in Example 2 according to Embodiment 3 of the present disclosure;

Fig. 10 is a block diagram illustrating base station hardware according to Embodiment 4 of the present disclosure;

Fig. 11 is a block diagram illustrating the terminal hardware according to Embodiment 4 of the present disclosure; And

Fig. 12 is a diagram showing structures of a communication system according to Embodiment 4 of the present disclosure.

Detailed description

To more clearly illustrate the objectives, technical solutions and advantages of the present application, embodiments of the present disclosure are further described below in detail by means of embodiments in conjunction with the drawings. It should be understood that the embodiments described herein are only intended to explain the present application and are not intended to limit the present application.

Embodiment 1

With the development of smart terminals and the enrichment of wireless data application services, the number of data users in the wireless network has increased significantly, wireless data content is no longer limited to traditional texts or images, and there are more and more multimedia services such as high-definition video and mobile TV, which leads to a sharp increase in wireless network traffic. Mobile Internet and the Internet of Things will be the main driving force for the development of mobile communications.

For the Internet of Things, the 3rd Generation Partnership Project (3GPP) standardization organization has developed two representative communication standard protocols: Machine Type Communications (MTC) and Narrowband Internet of Things (NB-IoT). For the mobile Internet, the 3GPP standards organization has recently developed the New Radio (NR) 5G communication standard protocol. According to the previous communication standard protocol, the terminal enters the RRC-IDLE state when there is no data to be sent or received in order to reduce the power consumption of the terminal. According to the previous communication standard protocol, it is required that the terminal switches from the RRC-IDLE state to the RRC-CONNECT state before sending or receiving data, and then transmitting the data.

Resource consumption and system power consumption will be generated when the terminal enters the RRC-CONNECT state from the RRC-IDLE state. Power consumption and resource consumption caused by state switching are especially significant in IoT applications. The amount of data transmitted by the terminal in the Internet of Things is small, but the transmission process may be performed periodically, resulting in more power consumption and resource consumption due to switching the RRC state each time the terminal transmits a small amount of data, thereby affecting the performance of the terminal and waiting time and reducing the user experience on the terminal side.

In order to solve the above problem, the embodiment provides a method for sending information and a method for receiving information. The information sending method is applied on the base station side, and the information receiving method is applied on the terminal side. Referring to a flowchart illustrating the interaction between a base station and a terminal, as shown in FIG. 1.

In S102, the base station sends uplink transmission configuration information to the terminal.

The terminal will receive uplink transmission configuration information sent by the base station. In an embodiment, the uplink transmission configuration information includes at least one of the following two types of information: (1) uplink channel resource configuration information; or (2) downlink control channel search space configuration information.

In some embodiment examples, the uplink transmission configuration information includes only one of the previous two types of information, while in some other embodiment examples, the uplink transmission configuration information may include both of the previous two types of configuration information. . In an embodiment, the uplink transmission configuration information may be used to indicate that the terminal should perform an uplink transmission in the RRC-CONNECT state, or indicate that the terminal should perform an uplink transmission in the RRC-IDLE state. Therefore, in the embodiment, the terminal does not need to switch from the RRC-IDLE state to the RRC-CONNECT state even if the terminal needs to perform uplink data transmission in the RRC-IDLE state, avoiding various signaling interactions required in the state switching process, thereby avoiding power consumption and system resource consumption generated by the terminal in the process of exchanging state switching signaling, which is advantageous for the optimal resource configuration of the terminal.

In some exemplary embodiments, the base station and the terminal may agree that both the uplink transmission by the terminal in the RRC-IDLE state and the uplink transmission by the terminal in the non-idle state can be implemented through the configuration of uplink transmission configuration information. communication lines. In some other exemplary embodiments, the base station may set the idle state transmission indication identifier in the uplink transmission configuration indication information and use the idle state transmission indication identifier to indicate whether the terminal can perform the uplink transmission in the RRC-IDLE state. .

If the uplink transmission configuration information includes the previous first type of configuration information, that is, uplink channel resource configuration information, the base station may indicate the uplink channel resource to the terminal through the configuration information. The uplink channel configured by the uplink channel resource configuration information may be a special resource for the terminal receiving the uplink transmission configuration information. Of course, in some other cases, the uplink channel configured by the uplink channel resource configuration information may also be a resource shared by a group of terminals (the number of terminals is more than one). It should be understood that the uplink channel resources configured by the uplink channel resource configuration information may be continuously allocated or discretely allocated, such as periodically allocated in the time domain.

If the uplink transmission configuration information includes the preceding second type of configuration information, that is, downlink control channel search space configuration information, the configuration information may indicate the downlink control channel search space to the terminal.

In an embodiment, the downlink control channel search space configuration information includes at least one of the following: 1) time domain position information of the downlink control channel search space; 2) frequency domain position information of the downlink control channel search space; and 3) downlink control channel allocation information in the downlink control channel search space.

The downlink control channel search spaces configured via the downlink control channel search spaces configuration information may be continuously distributed or discretely distributed, such as periodically distributed, in the time domain.

When the uplink channel configured by the uplink channel resource configuration information is a resource allocated to a specific terminal, the downlink control channel search space configured by the downlink control channel search space configuration information is also allocated to the terminal. Accordingly, when the uplink channel configured by the uplink channel resource configuration information is a resource shared by a group of terminals, the downlink control channel search space configured by the downlink control channel search space configuration information is also shared by terminal groups.

In some exemplary embodiments, the uplink transmission configuration information includes at least one of uplink channel resource configuration information and downlink control channel search space configuration information, and may further include (3) physical channel configuration information random access (PRACH).

The configuration information of the physical random access channel includes at least one of: 1) configuration information of the time-frequency resources occupied by the physical random access channel; and 2) configuration information of the random access signal sent on the physical random access channel.

When the uplink transmission configuration information includes the physical random access channel configuration information and the uplink channel resource configuration information, the uplink transmission may be understood as sending uplink data when a random access signal is sent, and the uplink transmission may also be understood as transmission of a random access signal carrying uplink data in a 5GNR system.

In an embodiment, one downlink control channel search space corresponds to at least one uplink channel, and in some examples, each uplink channel resource corresponds to one downlink control channel search space. It should be understood that the information carried in the downlink channel of the downlink control channel search space includes DCI. In some examples, the DCI may include at least one of the following types of information: first scheduling information; second scheduling information; hybrid automatic repeat-acknowledge request (HARQ-ACK) information about the data sent on the uplink channel; uplink transmission power adjustment information; first indication information; uplink grant (UL grant); time advance (TA) update information; handshake information resource configuration information for DCI; or a downlink grant (DL grant).

The information that may be carried in the DCI is described below.

For the first scheduling information, in some exemplary embodiments, when the first condition is satisfied, the base station sends, in the downlink control channel search space indicated by the downlink control channel search space configuration information, the first scheduling information used to indicate downlink data transmission link so that the terminal receives the downlink data according to the first scheduling information.

Referring to a flowchart illustrating the interaction between a terminal and a base station, as shown in FIG. 2.

In S202, the base station determines that the first condition is satisfied at the current time.

In S204, the base station sends the first scheduling information to the terminal.

In S206, the terminal receives, according to the first scheduling information, downlink data sent by the base station.

As can be seen from FIG. 2, the terminal will also receive the first scheduling information sent by the base station when the first condition is satisfied, and receive downlink data according to the first scheduling information.

In some examples, the first scheduling information may be a paging message sent by the base station to the terminal, and the downlink data transmitted on the downlink channel indicated by the first scheduling information is the downlink data indicated by the paging message to the terminal. The first scheduling information may include at least one of downlink channel configuration information, modulation order of downlink data to be transmitted, or transmission data block size indication information.

The first condition includes at least one of the conditions described below.

Condition 1: The downlink control channel search space at least partially overlaps the paging transmission window (PTW).

Condition 2: The downlink control channel of the downlink control channel search space at least partially overlaps the PTW.

Condition 3: The terminal TA is in a valid state. The terminal here refers to the target terminal to which the base station sends the paging message. The base station must be able to determine that the target terminal's timing advance is in a valid state.

It should be understood that "at least partially overlapping" refers to the fact that an overlap exists; for example, the downlink control channel search space at least partially overlapping the PTW may be such that the downlink control channel search space completely overlaps or partially overlaps the PTW. Similarly, a downlink control channel at least partially overlapping the PTW may also be such that the downlink control channel fully overlaps or partially overlaps the PTW.

In some other exemplary embodiments, in addition to at least one of the previous three conditions, the first condition further includes condition 4.

Condition 4: The base station has detected, in the uplink channel corresponding to the downlink control channel search space, that the terminal has performed data transmission.

Therefore, condition 4 is that the terminal has performed data transmission to the base station on the uplink channel corresponding to the search space of the downlink control channel.

In some exemplary embodiments, when it is determined that the first condition is satisfied, the base station and the terminal may perform operations in a certain manner with reference to one of the two exemplary methods described below. Two exemplary methods are described separately below.

First example:

The base station performs operations in several ways, as described below.

1) The base station does not send a paging message in a paging opportunity (PO) to the PTW. That is, the base station does not send a paging message at any of the POs in the PTW.

2) In the case where the PO in the PTW at least partially overlaps the downlink control channel search space, the base station does not send a paging message to the PO.

3) In the case where the PO in the PTW at least partially overlaps the downlink control channel of the downlink control channel search space, the base station does not send a paging message to the PO.

4) In the case where the time domain interval between the PO in the PTW and the downlink control channel of the downlink control channel search space is less than or equal to the first threshold, the base station does not send a paging message to the PO. The first threshold here may be configured by the base station or network and then sent to the terminal, or may be a value in the default configuration.

Accordingly, in the case where the first condition is satisfied, the terminal performs at least one of the operations described below.

1) The paging message is not detected at the PO in the PTW, that is, the terminal does not detect the paging message at any of the POs in the PTW.

2) In the case where the PO in the PTW at least partially overlaps the downlink control channel search space, the terminal does not detect the paging message in the PO.

3) In the case where the PO in the PTW at least partially overlaps the downlink control channel of the downlink control channel search space, the terminal does not detect the paging message in the PO.

4) In the case where the time domain interval between the PO in the PTW and the downlink control channel of the downlink control channel search space is less than or equal to the first threshold, the terminal does not detect the paging message in the PO.

It should be understood that the operation method of the terminal corresponds to the operation method of the base station. If the base station performs operation 1), the terminal also performs operation 1); and if the base station performs the operation in method 4), the terminal also performs the operation in method 4).

It should be noted that "PO" included in several ways of working here does not specifically refer to a specific PO, but refers to all POs in the PTW that satisfy the corresponding condition. For example, the PO described in method 2) where the base station does not send a paging message refers to all POs in the PTW that at least partially overlap the downlink control channel search space. Similarly, the PO described in method 3) where the base station does not send a paging message refers to all POs that at least partially overlap the downlink control channel of the downlink control channel search space.

Second example:

In some other exemplary embodiments, when it is determined that the first condition is satisfied, the base station side may perform the operation in the manners described below.

(1) The base station sends a paging message to the PO in the PTW. That is, the base station sends a paging message at all POs in the PTW.

(2) In the case where the PO in the PTW does not overlap the downlink control channel search space, the base station sends a paging message to the PO.

(3) In the case where the PO in the PTW does not overlap the downlink control channel of the downlink control channel search space, the base station sends a paging message to the PO.

(4) In a case where the time domain interval between the PO in the PTW and the downlink control channel of the downlink control channel search space is greater than or equal to the second threshold, the base station sends a paging message to the PO. The second threshold here may be configured by the base station or network and then sent to the terminal, or may be a value in the default configuration. It should be understood that the values of the second threshold and the first threshold may be the same or different.

Accordingly, in the case where the first condition is satisfied, the terminal performs at least one of the operations described below.

(1) The terminal detects the paging message at the PO in the PTW. That is, the terminal detects the paging message in all POs in the PTW.

(2) In the case where the PO in the PTW does not overlap the downlink control channel search space, the terminal detects the paging message in the PO.

(3) In the case where the PO in the PTW does not overlap the downlink control channel of the downlink control channel search space, the terminal detects the paging message in the PO.

(4) In the case where the time domain interval between the PO in the PTW and the downlink control channel of the downlink control channel search space is greater than or equal to the second threshold, the terminal detects a paging message in the PO.

The second example is similar to the first example, and the operation method of the terminal also corresponds to the operation method of the base station. Similarly, in the second example, "PO" in various ways of working does not specifically refer to a specific PO, but refers to all POs in the PTW that satisfy the corresponding condition.

As for the second scheduling information, in some exemplary embodiments, the base station sends the second scheduling information in the downlink control channel search space, and the DCI carrying the second scheduling information is scrambled with a terminal unique radio network temporary identifier (RNTI). In the embodiment, the base station sending the second scheduling information in the downlink control channel search space does not depend on whether the previous first condition is satisfied, that is, in this example, the first condition is required to be satisfied when the base station sends the first information scheduling to the terminal, but the first condition is not required to be satisfied when the base station sends the second scheduling information to the terminal. The second scheduling information is used to indicate, to the terminal, downlink data transmission. The terminal detects, in the downlink control channel search space, second scheduling information for sending downlink data. Then, the base station sends the downlink data to the terminal on the downlink channel indicated by the second scheduling information for reception by the terminal.

It should be understood that after the terminal has detected the downlink data sent by the base station according to the second scheduling information, the terminal may correctly receive the downlink data or may fail to receive the downlink data. Therefore, in some examples, when the terminal cannot detect downlink data sent by the base station, the terminal may send negative acknowledgment indication (NACK) information representing data reception failure to the base station. When the base station receives NACK indication information for the downlink data sent by the terminal, the base station may send retransmission scheduling information for the downlink data in the first downlink control channel search space. Then, the downlink data is sent to the terminal again. Therefore, in the case where the terminal cannot correctly receive downlink data according to the second scheduling information, the terminal can detect downlink data retransmission scheduling information in the first downlink control channel search space.

The first downlink control channel search space for sending retransmission scheduling information may be configured in at least one of the methods described below.

Method 1: The first downlink control channel search space for sending retransmission scheduling information is configured by the second scheduling information. That is, the base station sends the second scheduling information to the terminal, so that when the terminal receives downlink data, the first downlink control channel search space for sending retransmission scheduling information after downlink data transmission failure is configured in the second scheduling information.

Method 2: The first downlink control channel search space for sending retransmission scheduling information is configured in the downlink channel indicated by the second scheduling information.

Method 3: The first downlink control channel search space for sending retransmission scheduling information is configured by uplink transmission configuration information. It should be understood that when the base station indicates the first downlink control channel search space to the terminal by the uplink transmission configuration information, the base station can configure the first downlink control channel search space by the downlink control channel search space configuration information or by other information.

Method 4: The first downlink control channel search space for sending retransmission scheduling information is configured in the system information (SI).

Information about the HARQ-ACK data sent on the uplink channel

As described above, the downlink control channel search space configuration information may be used to configure the downlink control channel search space for the terminal. In some examples, the DCI carried on the downlink control channel includes information about the HARQ-ACK of data sent on the uplink channel. The HARQ-ACK information is used for the base station to feed back the uplink data reception situation of the base station to the terminal. Of course, the HARQ-ACK information may be a positive acknowledgment (ACK) or NACK.

In some exemplary embodiments, the base station may represent whether the HARQ-ACK is ACK or NACK information using 1-bit information. For example, in some exemplary embodiments, the information sent by the base station to the terminal includes 4 bits, and the value of the first three bits "001" represents that the information is HARQ-ACK information. After receiving the information and determining that the information is HARQ-ACK information, the terminal may further determine whether the HARQ-ACK information is ACK or NACK information by analyzing the last bit information. Of course, in some other exemplary embodiments, the base station may indicate to the terminal whether the HARQ-ACK information is ACK or NACK information with a few bits.

In some other exemplary embodiments, the base station may represent whether the HARQ-ACK information is an ACK or a NACK using a sequence; for example, the base station may represent the ACK by carrying the first sequence in the HARQ-ACK information, and may indicate that the HARQ-ACK is NACK by carrying the second sequence in the HARQ-ACK information. Here, the first sequence and the second sequence may be configured by the base station, or a default configuration may be adopted. Also, the first sequence can be obtained from sequence spreading of 1-bit ACK information, and the second sequence can be obtained from sequence spreading of 1-bit NACK information.

Uplink transmission power adjustment information:

For the uplink transmission power adjustment information, in the exemplary embodiment, if the HARQ-ACK in the DCI sent by the base station to the terminal is ACK, the DCI also includes uplink transmission power adjustment information. The uplink transmission power adjustment information may indicate that the terminal should adjust the transmission power so that the transmission power for the uplink transmission on the next available uplink channel resource is obtained. Here, the current transmit power of the terminal is referred to as "current transmit power", and the transmit power for uplink transmission on the next available uplink channel resource is referred to as "target transmit power". Then, the uplink transmission power adjustment information is used to indicate that the terminal should adjust the current transmission power in order to obtain the target transmission power.

It should be understood that the uplink transmission power adjustment information may indicate, in at least one of two ways, that the terminal should perform transmission power adjustment.

In some exemplary embodiments, the uplink transmit power control information carries the transmit power control policy. The adjustment policy is used to indicate that the target transmit power can be obtained if the terminal adjusts the current transmit power. In the example for reference, the adjustment policy carried in the uplink transmission power adjustment information is a power adjustment value, which may be a positive number or a negative number. Undoubtedly, the target transmission power, the current transmission power, and the power adjustment value satisfy the following relationship: target transmission power = current transmission power + power adjustment value.

For example, in one example, the power adjustment value is -3 decibels per milliwatt (dBm), and then the terminal can obtain the target transmit power from the current transmit power plus (-3 dBm) after receiving the power adjustment value.

In some other exemplary embodiments, the target transmit power value may be directly carried in the uplink transmit power control information, so that when the terminal receives a DCI carrying the uplink transmit power control information sent by the base station, the terminal may directly obtain the target transmit power. by parsing the uplink transmission power adjustment information without performing the calculation by the terminal itself.

For the first indication information, in some exemplary embodiments, the DCI may include first indication information for indicating that the terminal should perform at least one of the following operations:

1. Sending a random access signal on a random access channel;

2. return to idle radio resource control (RRC) state;

3. exiting the uplink transmission mode configured by the uplink transmission configuration information;

4. releasing an uplink channel resource and/or a search space resource configured by the uplink transmission configuration information; or

5. Performing an uplink transmission on the next available uplink channel resource.

It should be understood that the first indication information may also indicate that the terminal should perform two or even more of the previous operations at the same time. For example, in some examples, after the terminal has detected the DCI sent by the base station, the terminal determines by analysis that the base station instructs the terminal to simultaneously perform operations 2, 3, and 4 itself, and then the terminal can exit the corresponding uplink transmission mode, release the uplink channel resource and/or the search space resource configured by the uplink transmission configuration information, and simultaneously return to the RRC-idle state.

In an embodiment, when the terminal sends a random access signal on the random access channel according to the indication of the first indication information: if the format of the DCI carrying the first indication information is the first format, the terminal sends the random access signal on the random access channel. A DCI having a first format here refers to a DCI including at least random access configuration information. In some examples, the DCI having the first format may be the physical downlink control channel order (PDCCH order).

In one exemplary embodiment, the HARQ-ACK in the DCI received by the terminal is NACK, and then, when the terminal performs an uplink transmission on the next available uplink channel resource according to the indication of the first indication information, the transmitted data may be data corresponding to NACK in DCI, or other data.

For an uplink grant, in some examples, when the DCI sent by the base station to the terminal includes an uplink grant, and the value of at least one field in the uplink grant is the first set of values, the DCI indicates that the data sent on the corresponding uplink channel were correctly received. The field here may refer to an information element (IE). It should be understood that the first set of values may be configured by the base station and then notified to the terminal, or a default configuration may be adopted.

The IE in the UL grant for "indicating that data sent on the corresponding uplink channel was correctly received" may be uplink transmission resource allocation information. One value in the first set of values may be a value corresponding to invalid uplink transmission resource allocation information. For example, in some exemplary embodiments, the values in the first set of values include "00", "01", "10", and "11", where "00", "01", and "10" are all valid resource allocation information. uplink transmission, and only "11" is a value corresponding to invalid uplink transmission resource allocation information. Then, the base station may indicate to the terminal by carrying "11" in the UL grant that the uplink data on the corresponding uplink channel has been correctly received.

In an embodiment, the resource indicated by the UL grant may be used to perform HARQ retransmission on the uplink data of a previous uplink transmission, and may also be used to transmit other uplink data. The necessary configuration information for uplink transmission is included in the UL grant.

As for the TA update information, in some exemplary embodiments, the DCI includes TA update information. Similar to the case of the uplink transmission power adjustment information, when the base station instructs the terminal to adjust the TA, the base station may also instruct the terminal by notifying the terminal to adjust the TA value. However, in an embodiment, the TA adjustment value is not necessarily the variation of the updated TA value relative to the current TA value, but may be the amount of change of the updated TA value relative to the reference TA value. The reference TA value may be the last stored TA value or the TA value sent in a random access response (RAR). Therefore, in these examples, the TA update information in the DCI may be the change amount of the updated TA value relative to the reference TA value.

Of course, the base station may also directly notify the terminal of the updated TA value, so in these examples, the TA update information carried in the DCI may be the updated TA value in other examples in the embodiment.

It should be understood that in some exemplary embodiments, the TA update information may include both the updated TA value and the amount of change in the updated TA value relative to the reference TA value.

After receiving the DCI, the terminal may obtain an updated TA value according to the TA update information in the DCI, and store the updated TA value for later sending uplink information.

As for the DCI handshake information resource configuration information, in one exemplary embodiment, if the DCI sent by the base station to the terminal includes at least one of ACK information or TA update information, the terminal will return handshake information for DCI to the base station. after taking DCI. The acknowledgment information for the DCI is used by the terminal to notify the base station whether the DCI sent by the base station has been successfully received by the terminal. In order for the terminal to know which resources are used to send the DCI handshake information, in one exemplary embodiment, the DCI also includes DCI handshake information resource configuration information if the DCI includes ACK information and/or TA update information.

It should be understood that if the DCI sent by the base station to the terminal includes ACK information and/or TA update information, the base station will also receive acknowledgment information for the DCI, and the base station will receive acknowledgment information according to the acknowledgment information resource configuration information. at DCI.

With reference to a flowchart illustrating the interaction between a terminal and a base station, as shown in FIG. 3, in S302, the base station sends the DCI to the terminal.

In this example, ACK information, TA update information, and DCI handshake information resource configuration information are notified in the DCI information.

In S304, the terminal sends acknowledgment information for DCI to the base station using the resource configured using the resource configuration information.

In some exemplary embodiments, if the DCI sent by the base station to the terminal includes ACK information and/or TA update information, the terminal will discover a downlink control channel search space in a first time window, where the length of the first time window can be configured by the base by the station or adopts the default configuration, and the start time of the first time window may also be configured by the base station or adopts the default configuration. It should be understood that the length of the first time window and the start time of the first time window may be configured differently. For example, in one exemplary embodiment, the length of the first time window is configured by the base station, and the default configuration is taken for the start time of the first time window. Of course, in some other exemplary embodiments, the two parameters for the terminal to determine the first time window may also be configured in the same way, for example, both of the two parameters are configured by the base station, or default configurations are adopted for both of the two parameters.

In some other exemplary embodiments, if the DCI sent by the base station to the terminal includes ACK information and/or TA update information, the terminal will continue to discover the downlink control channel search space until the end of the downlink control channel search space.

With regard to the downlink grant, in some exemplary embodiments, a DCI including a downlink grant may be used to indicate that data sent on an uplink channel corresponding to the DCI has been correctly received. When the terminal receives the DCI, the terminal can determine that the data sent by the terminal itself to the base station via the uplink channel corresponding to the DCI has been correctly received by the base station.

According to the information sending method and the information receiving method provided in the embodiment, the uplink transmission configuration information sent by the base station to the terminal can allow the terminal in the RRC-IDLE state to directly perform uplink data transmission, so that the state switching process of the terminal drops down to uplink transmission, avoiding interaction signaling caused by state switching, and naturally reducing terminal power consumption and system resource occupancy by the terminal. When the transmission decision is applied to a scenario where frequent data transmission is required or a scenario where periodic uplink transmission is required, the power consumption of the terminal can be significantly reduced, the durability of the terminal can be increased, and the user experience on the terminal side can be improved.

Embodiment 2

This embodiment provides an information sending device. With reference to FIG. 4, the information sending apparatus 40 may be applied at the base station side and may be deployed at the base station to implement the information sending method described in the previous embodiment. The information sending apparatus 40 includes a sending unit 402 configured to send uplink transmission configuration information by the terminal.

This embodiment further provides an information receiving apparatus that can be applied at the terminal side. With reference to FIG. 5, the information receiving apparatus 50 includes a receiving unit 502 configured to receive uplink transmission configuration information sent by the base station. The information receiving apparatus 50 may be deployed in the terminal to implement the information receiving method described in the previous embodiment.

In an embodiment, the function of the sending unit 402 may be jointly implemented by the processor and the communication unit on the base station side, and the function of the receiving unit 502 may be jointly implemented by the communication unit and the processor of the terminal.

In an embodiment, the uplink transmission configuration information includes at least one of the following two types of information: (1) uplink channel resource configuration information; and (2) downlink control channel search space configuration information. In some embodiment examples, the uplink transmission configuration information includes only one of the preceding two types of information, while in some other embodiment examples, the uplink transmission configuration information may include both of the preceding two types of configuration information. . In an embodiment, the uplink transmission configuration information may be used to indicate that the terminal should perform an uplink transmission in the RRC-CONNECT state, or indicate that the terminal should perform an uplink transmission in the RRC-IDLE state. Therefore, in the embodiment, the terminal does not need to switch from the RRC-IDLE state to the RRC-CONNECT state even if the terminal needs to perform uplink data transmission in the RRC-IDLE state, avoiding various signaling interactions required in the state switching process, thereby avoiding power consumption and system resource consumption generated by the terminal in the switching signaling exchange process state, which is beneficial for the optimal resource configuration of the terminal.

If the uplink transmission configuration information includes the previous first type of configuration information, that is, uplink channel resource configuration information, the base station may indicate the uplink channel resource to the terminal through the configuration information. The uplink channel configured by the uplink channel resource configuration information may be a special resource for the terminal receiving the uplink transmission configuration information. Of course, in some other cases, the uplink channel configured by the uplink channel resource configuration information may also be a resource shared by a group of terminals (the number of terminals is more than one). It should be understood that the uplink channel resources configured by the uplink channel resource configuration information may be continuously allocated or discretely allocated, such as periodically allocated in the time domain.

If the uplink transmission configuration information includes the preceding second type of configuration information, that is, downlink control channel search space configuration information, the configuration information may indicate the downlink control channel search space to the terminal.

In an embodiment, the downlink control channel search space configuration information includes at least one of the following: (1) time domain position information of the downlink control channel search space; (2) position information of the frequency domain of the position control channel search space; and (3) downlink control channel allocation information in the downlink control channel search space.

The downlink control channel search spaces configured by the downlink control channel search spaces configuration information may be continuously allocated or discretely distributed, such as periodically distributed in the time domain.

When the uplink channel configured by the uplink channel resource configuration information is a resource allocated to a specific terminal, the downlink control channel search space configured by the downlink control channel search space configuration information is also allocated to the terminal. Accordingly, when the uplink channel configured by the uplink channel resource configuration information is a resource shared by a group of terminals, the downlink control channel search space configured by the downlink control channel search space configuration information is also shared by terminal groups.

Also, in an embodiment, one downlink control channel search space corresponds to at least one uplink channel, and in some examples, each uplink channel resource corresponds to one downlink control channel search space. It should be understood that the information carried in the downlink channel of the downlink control channel search space includes DCI. In some examples, the DCI may include at least one of the following types of information: first scheduling information; second scheduling information; information about the HARQ-ACK data sent on the uplink channel; uplink transmission power adjustment information; first indication information; providing an uplink; TA update information; handshake information resource configuration information for DCI; and providing a downlink.

Regarding the details of how the information sending device 40 implements the information sending method described in Embodiment 1, and the details of how the information receiving device 50 implements the information receiving method described in Embodiment 1, reference can be made to the description of Embodiment 1, and repetition is not given here.

It should be understood that in other exemplary embodiments, the information sending device 40 may also include a receiving module configured to receive information sent by the terminal. The information receiving device 50 may also include a sending unit configured to send information to the base station.

According to the information sending apparatus and the information receiving apparatus provided in the embodiment, the uplink transmission configuration information sent by the base station to the terminal can allow the terminal in the RRC-IDLE state to directly perform uplink data transmission, so that the state switching process of the terminal drops to uplink transmission, avoiding the signaling interaction caused by the state switch, and naturally reducing the power consumption of the terminal and the utilization of system resources by the terminal. When the transmission solution is applied to a scenario where frequent data transmission is required or a scenario where periodic uplink transmission is required, the power consumption of the terminal can be significantly reduced, the durability of the terminal can be increased, and the user experience at the terminal side can be improved.

Embodiment 3

The information transmission scheme will continue to be described in the embodiment in conjunction with examples to enable those skilled in the art to better understand the advantages and details of the previous information sending method and information receiving method.

In a wireless communication system, a base station sends uplink transmission configuration information to a terminal (eg, UE). The uplink channel configuration information includes: uplink channel resource configuration information; and downlink control channel search space configuration information.

In an embodiment, the uplink transmission configuration information may support UE data transmission in the RRC-IDLE state.

The uplink channel resource configuration information indicates the position information of the uplink channel resource group. As shown in FIG. 6, the uplink channel resource configuration period is one hour, and the amount of time domain position offset of the uplink channel resource within the configuration period is 10 minutes. Fig. 6 is a diagram showing the positions of 24 uplink channel resources within 24 hours; The 24 uplink channel resources are uplink channel resource 601, uplink channel resource 602, ..., uplink channel resource 624.

In an embodiment, the base station configures a terminal-specific downlink control channel search space for the terminal via downlink control channel search space configuration information, and the search space includes at least one send resource set (also referred to as send capability) downlink control channel. The DCI is carried on the downlink control channel and sent. Each uplink channel resource corresponds to one downlink control channel search space. As shown in FIG. 7, uplink channel resource 601 corresponds to search space 701, uplink channel resource 602 corresponds to search space 702, ... and uplink channel resource 624 corresponds to search space 724. In an embodiment, a time domain interval exists between the start time of the search space and the end time of the uplink channel resource corresponding to the search space. For example, a certain time domain interval exists between the end time of the uplink channel resource 601 and the start time of the search space 701. Here, the time domain interval between the end time of the uplink channel resource 601 and the start time of the search space 701 is defined as time domain interval 1, and so on, and the time domain interval between the end time of the uplink channel resource 624 and the start time of the search space 724 may be defined as a time domain interval of 24.

Example 1

In this example, the position in the time domain of the paging window 801 where the base station sends the paging information is shown in FIG. 8, and the PTW includes two paging events (POs), ie, a paging event 8011 and a paging event 8012. Two downlink control channel send opportunities exist in search space 701, ie send opportunity 7011 and send opportunity 7012. The time domain position of the paging window 8011 overlaps the time domain position of the search space 701, and the paging opportunity 8012 overlaps the send opportunity 7012.

In this example, in the case where the PO in the PTW at least partially overlaps the downlink control channel of the downlink control channel search space, the base station does not send a paging message to the PO; in case the PO in the PTW does not overlap the corresponding downlink control channel of the downlink control channel search space, the base station sends a paging message to the PO. Therefore, the base station does not send a page in the paging opportunity 8012, but the base station may send a page in the paging opportunity 8011 and send the page in the send opportunity 7012 in the search space 701. The terminal also tries to accept the paging at the paging opportunity 8011 and the send opportunity 7012.

Example 2

In this example, the position in the time domain of the paging transmission window where the base station sends the paging information is shown in FIG. 9, and the paging window 901 includes two paging occasions (POs), that is, a paging occasion 9011 and a paging occasion 9012. Two downlink control channel send opportunities exist in search space 701, ie send opportunity 7011 and send opportunity 7012. The time domain position of the paging window 901 overlaps the time domain position of the search space 701, the time domain interval between the paging opportunity 9011 and the send opportunity 7011 is D, and D is less than or equal to a threshold T configured by the base station (assuming threshold T is the first threshold). Those skilled in the art will appreciate that a default configuration may also be accepted for the threshold value T. The paging opportunity 9012 partially overrides the send opportunity 7012.

In this example, in the case where the PO in the PTW at least partially overlaps the downlink control channel of the downlink control channel search space, the base station does not send a paging message to the PO; in a case where the time domain interval between the PO in the PTW and the downlink control channel of the search space of the downlink control channel is less than or equal to the first threshold, the base station does not send a paging message to the PO. Because the time domain interval D between the paging opportunity 9011 and the send opportunity 7011 is less than or equal to T, the base station does not send the page at the paging opportunity 9011, but sends the page at the send opportunity 7011. Because the paging opportunity 9012 partially overrides the send opportunity 7012, the base station does not send the page at the paging opportunity 9012, but chooses to send the page at the send opportunity 7012. Accordingly, the terminal attempts to receive the paging at send opportunity 7011 and send opportunity 7012 corresponding to the paging transmission window 901 .

Embodiment 4

An embodiment provides a storage medium. The storage medium may store one or more computer programs that can be read, compiled, and executed by one or more processors. In an embodiment, the storage medium may store one of the information sending program or the information receiving program. The information sending program may be executed by one or more processors to implement any of the information sending method described in the foregoing embodiment. The information receiving program may be executed by one or more processors to implement any of the information receiving method described in the foregoing embodiment.

An embodiment further provides a base station. As shown in FIG. 10, the base station 100 includes a first processor 101, a first memory 102, and a first communication bus 103 used to connect the first processor 101 and the first memory 102. The first memory 102 may be a storage medium that stores a program to send information. The first processor 101 can read and compile the information sending program and execute the steps of the information sending method described in the previous embodiment. With regard to the implementation details of the method for sending information by the base station 100, reference may be made to the description of the previous embodiment. The repetition is not given here.

The embodiment further provides a terminal. As shown in FIG. 11, terminal 110 includes a second processor 111, a second memory 112, and a second communication bus 113 used to connect the second processor 111 and the second memory 112. The second memory 112 may be a storage medium that stores an information receiving program. The second processor 111 may read and compile the information receiving program and execute the steps of the information receiving method described in the previous embodiment. With regard to the implementation details of the method for receiving information by the terminal 110, reference may be made to the description of the previous embodiment. The repetition is not given here.

An embodiment further provides a communication system. With reference to FIG. 12, communication system 12 includes a base station 100 and a terminal 110. In some exemplary embodiments, communication system 12 includes one base station 100 and a plurality of terminals 110. In some other exemplary embodiments, communication system 12 may include more than one base station 100.

The communication system provided in the embodiment can be applied to a scenario where long-term waiting and periodic transmission of uplink data is required, such as the IoT scenario, avoiding RRC state switching during data transmission, reducing signaling interaction, greatly reducing terminal power consumption, and increasing terminal durability.

Those skilled in the art will appreciate that the method and apparatus for sending information, the method and apparatus for receiving information, the terminal, the base station, the communication system, and the storage medium provided in various embodiments of the present application can be applied not only to existing communication systems and 5G communications systems currently being deployed, but also in any future communications system.

In the present application, unless there is a conflict, features of different embodiments may be combined with each other and used in the same embodiment.

Obviously, those skilled in the art will appreciate that the functional modules/blocks in all or part of the system, devices, and method steps disclosed above may be implemented as software (which may be implemented as software codes executable by a computing device), firmware, hardware, and a suitable combination thereof. In a hardware implementation, the separation of the preceding functional modules/blocks may not correspond to the separation of the physical components. For example, one physical component may have multiple functions, or one function or step may be shared by multiple physical components. Some or all of the physical components may be implemented as software, executed by a processor such as a central processing unit, digital signal processor, or microprocessor, may be implemented as hardware, or may be implemented as integrated circuits such as ASICs. Such software may be distributed on a computer-readable medium and executed by a computing device. Moreover, in some cases, the steps illustrated or described herein may be performed in a different order from the sequence described herein. Computer-readable media may include computer storage media (or non-volatile media) and communication media (or transient media). As known to those skilled in the art, the term computer storage media includes volatile and nonvolatile media, and removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, random access memory (RAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, CD-ROM read only memory ( CD-ROM), digital video disc (DVD) or other optical disc storage, magnetic cassette, magnetic tape, disk storage or other magnetic storage device, or any other medium used to store desired information and accessed by a computer . Moreover, as is known to those skilled in the art, communication media generally includes computer-readable instructions, data structures, program modules, or other data on carriers or modulated data signals carried by other transport mechanisms, and may include any media. (environment) of information delivery. Therefore, the present application is not limited to any particular combination of hardware and software.

The foregoing is a more detailed description of embodiments of the present disclosure in conjunction with implementations and should not be construed as limiting the embodiments of the present application. For those skilled in the art to which this application pertains, simple inferences or substitutions can be made without deviating from the concept of this application and are considered to be within the scope of this application.

Claims (22)

1. A wireless communication method comprising the step of: sending, by means of the base station, to the terminal, uplink transmission configuration information containing uplink channel resource configuration information, and downlink control channel search space configuration information, wherein the information carried in the downlink control channel of the downlink control channel search space comprises downlink control information (DCI), The DCI indicates a hybrid automatic repeat request-acknowledge (HARQ-ACK) of the data sent on the uplink channel, and The DCI further indicates the variation of the updated time advance (TA) value relative to the reference TA value, the method further comprising, upon satisfying the first condition that the TA of the terminal is in a valid state, sending scheduling information in the downlink control channel search space for scheduling downlink data transmission. 2. The method of claim 1, further comprising, upon satisfaction of the first condition, the step of: in the case where a paging opportunity (PO) at least partially overlaps the downlink control channel search space, skipping sending a paging message at that PO . 3. The method of claim 1, further comprising sending, in the downlink control channel search space, scheduling information for scheduling downlink data transmission, wherein the scheduling information is scrambled with a terminal specific radio network temporary identifier (RNTI) . 4. A wireless communication method comprising the step of: receive by the terminal from the base station configuration information containing uplink channel resource configuration information, and downlink control channel search space configuration information, wherein the information carried in the downlink control channel of the downlink control channel search space comprises downlink control information (DCI), The DCI indicates a hybrid automatic repeat request-acknowledge (HARQ-ACK) of the data sent on the uplink channel, and The DCI further indicates the variation of the updated time advance (TA) value relative to the reference TA value, the method further comprising, upon satisfying the first condition that the TA of the terminal is in a valid state, performing detection in the downlink control channel search space of scheduling information for scheduling downlink data transmission. 5. The method of claim 4, further comprising, upon satisfaction of the first condition, the step of: in the case where the paging opportunity (PO) at least partially overlaps the search space of the downlink control channel, skip detection of the paging message in this PO . 6. The method of claim 4, further comprising detecting, in the downlink control channel search space, scheduling information for scheduling downlink data transmission, wherein the scheduling information is scrambled with a terminal specific radio network temporary identifier (RNTI) . 7. A wireless communication device comprising a processor and memory, wherein the processor is configured to read the code from the memory and carry out the method according to any one of paragraphs. 1-3. 8. A wireless communication device comprising a processor and memory, wherein the processor is configured to read the code from the memory and carry out the method according to any one of paragraphs. 4-6.

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