CN110139364B

CN110139364B - Data transmission method, device, storage medium, base station and terminal

Info

Publication number: CN110139364B
Application number: CN201810107937.7A
Authority: CN
Inventors: 陈宪明; 戴博; 方惠英; 刘锟; 杨维维
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2018-02-02
Filing date: 2018-02-02
Publication date: 2024-05-31
Anticipated expiration: 2038-02-02
Also published as: WO2019149096A1; CN110139364A

Abstract

The invention discloses a data transmission method, a device, a storage medium, a base station and a terminal, wherein the method comprises the following steps: the base station sends a carrier configuration message to the terminal, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers; the base station uses the carrier set to transmit downlink data or receive uplink data. The invention informs the configuration information of the terminal carrier set through the carrier configuration message and uses the carrier set to send downlink data or receive uplink data, thereby realizing the load balance on different NB-IoT carriers, ensuring smooth uplink data or downlink data transmission process and leading the data transmission process to be more flexible.

Description

Data transmission method, device, storage medium, base station and terminal

Technical Field

The present invention relates to the field of communications, and in particular, to a data transmission method, apparatus, storage medium, base station, and terminal.

Background

To meet the cellular internet of things demands, in the Rel-13 protocol version promulgated by the 3GPP (third generation partnership project, 3rd Generation Partnership Project) organization, the Narrowband internet of things access system (NB-IoT) was first supported. In the subsequently released Rel-14 and the Rel-15 protocol version in question, the NB-IoT system described above is enhanced; new characteristics include positioning, multicasting, capacity increase (paging and access with non-anchor carriers), delay/power consumption reduction and time division duplexing; in particular to delay/power consumption reduction, enhanced aspects include introducing a wake-up signal, data transmission using a random access procedure, supporting additional transmission of system information blocks. To support a wider range of internet of things applications and deployment scenarios, NB-IoT systems will continue to be enhanced in the Rel-16 stage.

In an NB-IoT system, a base station and a terminal transmit uplink data or downlink data on one NB-IoT carrier, and the data transmission is not flexible enough.

Disclosure of Invention

The invention provides a data transmission method, a data transmission device, a storage medium, a base station and a terminal, which are used for solving the problem that data transmission is not flexible enough in the prior art.

In order to solve the above technical problems, in one aspect, the present invention provides a data transmission method, including: the base station sends a carrier configuration message to the terminal, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers; and the base station uses the carrier wave set to send downlink data or receive uplink data.

Optionally, the downlink data is one of the following: downlink service data, message 2 in random access procedure, message 4 in random access procedure, paging message.

Optionally, the uplink data is one of the following: uplink service data, message 3 in random access procedure, message 5 in random access procedure.

In another aspect, the present invention further provides a data transmission method, including: the method comprises the steps that a terminal receives a carrier configuration message sent by a base station, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers; and the terminal uses the carrier wave set to receive downlink data or send uplink data.

On the other hand, the invention also provides a data transmission device, which comprises: the first sending module is used for sending a carrier configuration message to the terminal, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers; and the first transceiver module is used for transmitting downlink data or receiving uplink data by using the carrier set.

On the other hand, the invention also provides a data transmission device, which comprises: a third receiving module, configured to receive a carrier configuration message sent by a base station, where the carrier configuration message carries configuration information of a carrier set, and the carrier set includes one or more carriers; and the second transceiver module is used for receiving downlink data or transmitting uplink data by using the carrier wave set.

In another aspect, the present invention also provides a storage medium storing a computer program which, when executed by a processor, implements the steps of the data transmission method described above.

In another aspect, the present invention further provides a base station, at least including a memory, and a processor, where the memory stores a computer program, and the processor implements the steps of the method when executing the computer program on the memory.

On the other hand, the invention also provides a terminal, which at least comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the method when executing the computer program on the memory.

According to some embodiments of the invention, the configuration information of the carrier set of the terminal can be informed through the carrier configuration message, and the carrier set is used for sending downlink data or receiving uplink data, so that load balancing on different NB-IoT carriers is realized, and the uplink data or the downlink data transmission process is smooth, so that the data transmission process is more flexible.

Drawings

Fig. 1 is a flowchart of a data transmission method in a first embodiment of the present invention;

fig. 2 is a flowchart of a data transmission method according to a second embodiment of the present invention;

Fig. 3 is a schematic structural view of a data transmission device according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a data transmission device according to a fourth embodiment of the present invention.

Detailed Description

In order to solve the problem that the data transmission in the prior art is not flexible enough; the invention provides a data transmission method, a data transmission device, a storage medium, a base station and a terminal, and the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Example 1

The embodiment of the invention provides a data transmission method, and the flow of the method is shown in fig. 1, and the method comprises steps S101 to S102:

S101, a base station sends a carrier configuration message to a terminal, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers;

S102, the base station uses the carrier wave set to send downlink data or receive uplink data.

According to the embodiment of the invention, the configuration information of the carrier set of the terminal is informed through the carrier configuration message, and the carrier set is used for sending downlink data or receiving uplink data, so that the load balance on different NB-IoT carriers is realized, the uplink data or downlink data transmission process is smooth, the data transmission process is more flexible, and the problems of blocking of uplink and downlink data transmission and inflexibility of data transmission are reduced.

Wherein, the downlink data is one of the following: downlink service data, message 2 in random access procedure, message 4 in random access procedure, paging message. Specifically, the message 2 in the random access procedure includes: message 2 in contention random access procedure or message 2 in non-contention random access procedure.

The uplink data is one of the following: uplink service data, message 3 in random access procedure, message 5 in random access procedure.

The process of the base station transmitting downlink data by using the carrier wave set specifically comprises the following steps: the base station sends downlink allocation information on the appointed carrier, wherein the downlink allocation information is used for scheduling downlink data and carries indication information of the carrier which sends the downlink data in the carrier set; the base station transmits downlink data on a carrier wave for transmitting the downlink data; the carrier is designated as the 1 st carrier in the carrier set, or the carrier configured by the base station through the carrier configuration message, or the carrier receiving the message 1 in the random access process, or the carrier selected from the carrier set according to the terminal identification. The carriers configured by the base station through the carrier configuration message belong to the carrier set, and the message 1 in the random access process includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure.

After the base station sends the downlink data by using the carrier set, the base station may also receive HARQ-ACK feedback corresponding to the downlink data according to one of the following manners: (1) Receiving on the 1 st carrier in the carrier set used for receiving the uplink data; (2) receiving on a carrier on which downlink allocation information is transmitted; (3) receiving on a carrier transmitting downlink data; (4) Receiving on a carrier wave which is sent downwards before starting HARQ-ACK feedback transmission; (5) Received on the carrier receiving message 1 during random access.

The base station receiving uplink data by using the carrier set may specifically include: the base station sends uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling uplink data and carries indication information of a carrier for receiving the uplink data in a carrier set; the base station receives the uplink data on a carrier wave for receiving the uplink data; the designated carrier is the 1 st carrier in the carrier set used for sending downlink data, or the carrier for sending the message 2 in the random access process, or the carrier configured by the base station through the carrier configuration message, or the carrier for receiving the message 1 in the random access process. Specifically, the message 2 in the random access procedure includes: message 2 in contention random access procedure or message 2 in non-contention random access procedure; message 1 in the random access procedure includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure; the carrier configured by the base station through the carrier configuration message belongs to a carrier set used for transmitting downlink data.

In the above process, the carrier set used by the base station for transmitting downlink data and the carrier set used by the base station for receiving uplink data are the same carrier set.

In a process of implementing the method, the method may further include any one of the following configuration processes:

(1) The base station configures a carrier list through a carrier configuration message; the carrier set is a carrier list. In this process, the meaning that the carrier set is represented by the carrier list is that the carrier set and the carrier list are equivalently present, and the carrier set is the carrier list, that is, the carrier list is the carrier set.

(2) The base station configures a carrier set list through a carrier configuration message; the carrier set is one of all carrier sets contained in the carrier set list.

(3) The base station configures a carrier list through a carrier configuration message, wherein all carriers contained in the carrier list are carriers which can be used for transmitting downlink allocation information; the base station determines a first carrier set corresponding to each carrier in the carrier list through carrier configuration information configuration or according to a first preset rule; the carrier set is a first carrier set corresponding to a carrier for transmitting downlink allocation information.

The first preset rule comprises the following steps: in the first carrier set corresponding to the carrier with the number K in the carrier list, the carrier with the number p is the carrier with the number (k+p) mod K in the carrier list; k is an integer greater than or equal to 0 and smaller than K, P is an integer greater than or equal to 0 and smaller than P, K is the number of carriers contained in the carrier list, and P is the number of carriers contained in the first carrier set.

(4) The base station configures a resource list and a carrier list through a carrier configuration message, wherein all resources contained in the resource list are resources which can be used for transmitting the message 1 in the random access process; the base station configures or determines a second carrier set corresponding to each resource in the resource list according to a second preset rule through the carrier configuration message, wherein the second carrier set is contained in the carrier list; the carrier set is a second carrier set corresponding to the resource that receives message 1.

The second preset rule comprises the following steps: in the second carrier set corresponding to the resource with the number x in the resource list, the carrier with the number q is the carrier with the number (y+q) mod Y in the carrier list; wherein Y is an integer greater than or equal to 0 and less than Y, and represents the number of the carrier in the carrier list where the resource with the number x is located, Q is an integer greater than or equal to 0 and less than Q, Y is the number of carriers contained in the carrier list, and Q is the number of carriers contained in the second carrier set.

In implementation, the carrier configuration message may be one of the following: downlink special radio resource control RRC message, system information block message.

Before the base station transmits downlink data or receives uplink data by using the carrier set, the method may further include: the base station receives a message 1 in the random access process or a message 3 in the random access process sent by the terminal; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using the carrier set. Wherein the base station receives message 1 in one of the following ways: receiving on a proprietary resource bound with the capability to transmit data using a set of carriers; received on a proprietary resource bound to the advanced data transfer EDT.

Example two

The embodiment of the invention provides a data transmission method, and the flow of the method is shown in fig. 2, and the method comprises steps S201 to S202:

s201, a terminal receives a carrier configuration message sent by a base station, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers;

s202, the terminal uses the carrier wave set to receive downlink data or send uplink data.

According to the embodiment of the invention, the configuration information of the carrier set is obtained through the carrier configuration message, and the carrier set is used for receiving downlink data or sending uplink data, so that the load balance on different NB-IoT carriers is realized, the uplink data or downlink data transmission process is smooth, the data transmission process is more flexible, and the problems of blocking of uplink and downlink data transmission and inflexibility of data transmission are reduced.

The downlink data is one of the following: downlink service data, message 2 in random access procedure, message 4 in random access procedure, paging message. Specifically, the message 2 in the random access procedure includes: message 2 in contention random access procedure or message 2 in non-contention random access procedure.

The uplink data includes one of: uplink service data, message 3 in random access procedure, message 5 in random access procedure.

The process of receiving downlink data by the terminal by using the carrier wave set specifically comprises the following steps: the terminal receives downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling downlink data and carries indication information of a carrier for receiving the downlink data in a carrier set; the terminal receives downlink data on a carrier wave for receiving the downlink data; the carrier is designated as the 1 st carrier in the carrier set, or the carrier configured by the base station through the carrier configuration message, or the carrier for transmitting the message 1 in the random access process, or the carrier selected from the carrier set according to the terminal identification. The carriers configured by the base station through the carrier configuration message belong to the carrier set, and the message 1 in the random access process includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure.

After the terminal receives the downlink data by using the carrier set, the method may further include: transmitting HARQ-ACK feedback corresponding to downlink data according to one of the following modes: (1) Transmitting on the 1 st carrier in the carrier set used for transmitting the uplink data; (2) transmitting on a carrier on which downlink allocation information is received; (3) transmitting on a carrier on which downlink data is received; (4) Transmitting on a carrier wave for downlink reception before starting HARQ-ACK feedback transmission; (5) On the carrier on which message 1 is transmitted during random access.

The terminal sending uplink data by using the carrier set may specifically include: the terminal receives uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling uplink data and carries indication information of a carrier which transmits the uplink data in a carrier set; the terminal transmits uplink data on a carrier wave for transmitting the uplink data; the designated carrier is the 1 st carrier in the carrier set used for receiving the downlink data, or the carrier for receiving the message 2 in the random access process, or the carrier configured by the base station through the carrier configuration message, or the carrier for transmitting the message 1 in the random access process. Specifically, the message 2 in the random access procedure includes: message 2 in contention random access procedure or message 2 in non-contention random access procedure; message 1 in the random access procedure includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure; the carrier configured by the base station through the carrier configuration message belongs to a carrier set used for transmitting downlink data.

In the above process, the carrier set used by the terminal to receive the downlink data and the carrier set used by the terminal to send the uplink data are the same carrier set.

In a process of implementing the above method, the above method may further include any one of the following processes:

(1) The terminal acquires a carrier list through a carrier configuration message; the carrier set is a carrier list. In this process, the meaning that the carrier set is represented by the carrier list is that the carrier set and the carrier list are equivalently present, and the carrier set is the carrier list, that is, the carrier list is the carrier set.

(2) The terminal acquires a carrier set list through a carrier configuration message; the carrier set is one of all carrier sets contained in the carrier set list.

(3) The terminal acquires a carrier list through a carrier configuration message, wherein all carriers contained in the carrier list are carriers which can be used for transmitting downlink allocation information; the terminal obtains or determines a first carrier set corresponding to each carrier in the carrier list according to a first preset rule through the carrier configuration message; the carrier set is a first carrier set corresponding to a carrier for receiving downlink allocation information

(4) The terminal obtains a resource list and a carrier list through a carrier configuration message, wherein all resources contained in the resource list are resources which can be used for transmitting the message 1 in the random access process; the terminal obtains or determines a second carrier set corresponding to each resource in the resource list according to a second preset rule through the carrier configuration message, wherein the second carrier set is contained in the carrier list; the carrier set is a second carrier set corresponding to the resource that sent message 1.

The carrier set is one of all carrier sets contained in the carrier set list, and when the carrier set of one of all carrier sets contained in the carrier set list is specifically determined, the following determination method is adopted: and determining a carrier set according to the identification of the terminal or the resource of the message 1 in the random access process.

In implementation, the carrier configuration message is one of the following: downlink special radio resource control RRC message, system information block message.

Before the terminal receives the downlink data or transmits the uplink data by using the carrier set, the method may further include: the terminal sends a message 1 in the random access process or a message 3 in the random access process to the base station; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using the carrier set. Wherein the terminal sends message 1 in one of the following ways: transmitting on a dedicated resource bound to the ability to transmit data using a set of carriers; sent on a proprietary resource bound to the advanced data transfer EDT.

In the implementation process, the terminal determines whether the downlink allocation information carries indication information of a carrier for receiving downlink data or whether the uplink grant information carries indication information of a carrier for sending uplink data according to the number of carriers included in the carrier set.

Example III

An embodiment of the present invention provides a data transmission device, where a structural schematic diagram of the device is shown in fig. 3, and the device includes:

A first sending module 10, configured to send a carrier configuration message to a terminal, where the carrier configuration message carries configuration information of a carrier set, and the carrier set includes one or more carriers; the first transceiver module 11 is coupled to the first transmitting module 10, and is configured to transmit downlink data or receive uplink data using a carrier set.

The first transceiver module is specifically configured to: transmitting downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling downlink data and carries indication information of a carrier for transmitting the downlink data in a carrier set; transmitting downlink data on a carrier wave transmitting the downlink data; the carrier is designated as the 1 st carrier in the carrier set, or the carrier configured by the base station through the carrier configuration message, or the carrier receiving the message 1 in the random access process, or the carrier selected from the carrier set according to the terminal identification. The carriers configured by the base station through the carrier configuration message belong to the carrier set, and the message 1 in the random access process includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure.

The device further comprises: the first receiving module is configured to receive HARQ-ACK feedback corresponding to downlink data according to one of the following manners: receiving on the 1 st carrier in the carrier set used for receiving the uplink data; receiving on a carrier wave transmitting downlink allocation information; receiving on a carrier wave transmitting downlink data; receiving on a carrier wave which is sent downwards before starting HARQ-ACK feedback transmission; received on the carrier receiving message 1 during random access.

The first transceiver module is specifically configured to: transmitting uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling uplink data and carries indication information of a carrier for receiving the uplink data in a carrier set; receiving uplink data on a carrier wave receiving the uplink data; the designated carrier is the 1st carrier in the carrier set used for sending downlink data, or the carrier for sending the message 2 in the random access process, or the carrier configured by the base station through the carrier configuration message, or the carrier for receiving the message 1 in the random access process. Specifically, the message 2 in the random access procedure includes: message 2 in contention random access procedure or message 2 in non-contention random access procedure; message 1 in the random access procedure includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure; the carrier configured by the base station through the carrier configuration message belongs to a carrier set used for transmitting downlink data.

The apparatus may further comprise a configuration module for implementing any one of the following configuration procedures:

The carrier configuration message may be one of the following: downlink special radio resource control RRC message, system information block message.

In a preferred implementation, the apparatus may further include: the second receiving module is used for receiving a message 1 in the random access process or a message 3 in the random access process sent by the terminal; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using the carrier set.

Example IV

An embodiment of the present invention provides a data transmission device, where a structural schematic diagram of the device is shown in fig. 4, and the device includes:

a third receiving module 20, configured to receive a carrier configuration message sent by a base station, where the carrier configuration message carries configuration information of a carrier set, and the carrier set includes one or more carriers; the second transceiver module 21 is coupled to the third receiving module 20, and is configured to receive downlink data or transmit uplink data using the carrier set.

The second transceiver module is specifically configured to: receiving downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling downlink data and carries indication information of a carrier for receiving the downlink data in a carrier set; receiving downlink data on a carrier wave receiving the downlink data; the carrier is designated as the 1 st carrier in the carrier set, or the carrier configured by the base station through the carrier configuration message, or the carrier for transmitting the message 1 in the random access process, or the carrier selected from the carrier set according to the terminal identification.

The apparatus may further include: the second sending module is configured to send HARQ-ACK feedback corresponding to the downlink data according to one of the following manners: transmitting on the 1 st carrier in the carrier set used for transmitting the uplink data; transmitting on a carrier wave receiving downlink allocation information; transmitting on a carrier wave receiving downlink data; transmitting on a carrier wave for downlink reception before starting HARQ-ACK feedback transmission; on the carrier on which message 1 is transmitted during random access.

The second transceiver module is specifically configured to: receiving uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling uplink data and carries indication information of a carrier for transmitting the uplink data in a carrier set; transmitting uplink data on a carrier wave transmitting the uplink data; the designated carrier is the 1st carrier in the carrier set used for receiving the downlink data, or the carrier for receiving the message 2 in the random access process, or the carrier configured by the base station through the carrier configuration message, or the carrier for transmitting the message 1 in the random access process. Specifically, the message 2 in the random access procedure includes: message 2 in contention random access procedure or message 2 in non-contention random access procedure; message 1 in the random access procedure includes: message 1 in contention random access procedure or message 1 in non-contention random access procedure; the carrier configured by the base station through the carrier configuration message belongs to a carrier set used for transmitting downlink data.

The above device may also implement any one of the following processes:

The carrier configuration message is one of the following: downlink special radio resource control RRC message, system information block message.

Optionally, the apparatus may further include: a third sending module, configured to send a message 1 in a random access procedure or a message 3 in a random access procedure to a base station; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using the carrier set.

Example five

In this embodiment, the system is a TDD (time division duplex ) NB-IoT system.

The preset terminal has the capability of transmitting data by utilizing the carrier wave set; the base station sends a special RRC message to the terminal; the terminal receives the special RRC message; the dedicated RRC message carries configuration information of a carrier set, where the configuration information of the carrier set is formed by configuration information of each carrier included in the carrier set.

The base station transmits NPDSCH data and receives NPUSCH format 1 data by utilizing a carrier set; the terminal receives NPDSCH data and transmits NPUSCH format 1 data using the carrier set.

Wherein, the carrier set comprises 4 carriers (indexes are 0, 1,2 and 3 in sequence); for one Non-anchor (Non-anchor) carrier in the carrier set, the corresponding configuration information includes frequency location information, downlink valid subframe information, downlink transmission gap information, an operation mode, and configuration information related to the operation mode, and Narrowband Reference Signal (NRS) power information.

The base station transmits NPDSCH data using a set of carriers, including: the base station sends downlink allocation NPDCCH data on a designated carrier in the carrier set, wherein the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through a special RRC message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal; the downlink allocation NPDCCH is used to schedule NPDSCH data and carries carriers of the 2-bit indication carrier set that are transmitted NPDSCH. Then, the base station transmits NPDSCH data on the carrier of transmission NPDSCH; for example, a 2-bit value of "10" indicates that the carrier with index 2 in the carrier set is the carrier for transmission NPDSCH; in this case, the base station transmits NPDSCH data to the terminal on the carrier with index 2 in the carrier set.

After the base station sends NPDSCH, the base station also needs to receive HARQ-ACK feedback corresponding to NPDSCH; the carrier used by the base station to receive HARQ-ACK feedback is one of:

option-1: the 1 st carrier in the carrier set;

option-2: a carrier wave for transmitting downlink allocation NPDCCH data;

option-3: transmitting NPDSCH carriers;

Option-4: the carrier wave of downlink transmission is carried out before the HARQ-ACK feedback transmission starts, and the downlink transmission comprises NPDCCH transmission and NPDSCH transmission; for example, if the base station is transmitting NPDCCH before the start of the HARQ-ACK feedback transmission, the carrier receiving the HARQ-ACK feedback is the carrier transmitting NPDCCH; if the base station is transmitting NPDSCH before the HARQ-ACK feedback transmission starts, the carrier wave for receiving the HARQ-ACK feedback is the carrier wave for transmitting NPDSCH data;

Option-5: allocating NPDCCH carrier waves for transmitting downlink when NPDCCH transmission and HARQ-ACK feedback transmission overlap in time; otherwise, the carrier is sent NPDSCH.

In all embodiments of the invention, if not specifically specified, the NPDCCH includes downlink allocation NPDCCH and/or uplink grant NPDCCH data.

The terminal receives NPDSCH data using the carrier set, including: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set, wherein the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through a special RRC message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal; the downlink allocation NPDCCH is used to schedule NPDSCH data and carries carriers of the 2-bit indication carrier set that are transmitted NPDSCH. The terminal then receives NPDSCH data on the carrier of transmission NPDSCH; for example, a 2-bit value of "10" indicates that the carrier with index 2 in the carrier set is the carrier for transmission NPDSCH; in this case, the base station receives NPDSCH data on the carrier with index 2 in the carrier set.

After receiving NPDSCH, the terminal needs to send HARQ-ACK feedback corresponding to NPDSCH; the carrier used for the terminal to send HARQ-ACK feedback is one of:

option-1: the 1 st carrier in the carrier set;

Option-2: receiving carrier waves of downlink allocation NPDCCH data;

option-3: receiving NPDSCH carriers;

Option-4: the carrier wave of downlink reception before the HARQ-ACK feedback transmission starts, wherein the downlink reception comprises NPDCCH reception and NPDSCH reception; for example, if the terminal is receiving NPDCCH before the start of the HARQ-ACK feedback transmission, the carrier transmitting NPUSCH format 2 is the carrier of reception NPDCCH; if the terminal is receiving NPDSCH before the HARQ-ACK feedback transmission starts, the carrier wave for sending the HARQ-ACK feedback is the carrier wave for receiving NPDSCH data;

option-5: allocating NPDCCH carrier waves for receiving downlink when NPDCCH transmission overlaps with HARQ-ACK feedback transmission in time; otherwise, a carrier wave of NPDSCH is received.

The terminal sends NPUSCH format 1 data by using the carrier wave set, which comprises the following steps: the terminal receives uplink grant NPDCCH data on a designated carrier in the carrier set; the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through the special RRC message, for example, the 2 nd carrier in the carrier set is configured to the terminal; the uplink grant NPDCCH is used to schedule NPUSCH format 1 data and carries 2 bits indicating the carrier in the carrier set that transmits NPUSCH format 1. Then, the terminal transmits NPUSCH format 1 data on a carrier wave for transmitting NPUSCH format 1; for example, a 2-bit value of "01" indicates that the carrier with index 1 in the carrier set is the carrier for transmitting NPUSCH format 1 data; and the terminal transmits the NPUSCH format 1 data on the carrier with the index of 1 in the carrier set.

The base station receives NPUSCH format 1 data using a carrier set, comprising: the base station transmits uplink grant NPDCCH data on a designated carrier in the carrier set; the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal, for example, the 2 nd carrier in the carrier set is configured to the terminal; the uplink grant NPDCCH data is used to schedule NPUSCH format 1 data and carries a carrier of 2 bits indicating that NPUSCH format 1 is transmitted in the carrier set. Then, the base station receives NPUSCH format 1 data on a carrier transmitting NPUSCH format 1; for example, a 2-bit value of "01" indicates that the carrier with index 1 in the carrier set is the carrier for transmitting NPUSCH format 1 data; the base station receives NPUSCH format 1 data on a carrier with index 1 in the carrier set.

If the carrier set contains only 1 carrier, the base station and the terminal use the carrier set is equivalent to using the unique carrier in the carrier set. In this case, the base station and the terminal transmit downlink allocation NPDCCH and uplink grants NPDCCH and NPDSCH and NPUSCH format 1 data on unique carriers of the carrier set; uplink grant NPDCCH does not carry a carrier field indicating "transport NPUSCH format 1" and downlink allocation NPDCCH does not carry a carrier field indicating "transport NPDSCH".

It should be noted that, in all embodiments of the present invention, NPDSCH data is equivalent to downlink traffic data and NPUSCH format 1 data is equivalent to uplink traffic data; transmitting (including transmitting and receiving) data with the carrier set is transmitting data within a plurality of carrier ranges contained in the carrier set, and transmitting data with a plurality of carriers contained in the carrier set not simultaneously; the transmission includes sending and/or receiving.

Example six

In this embodiment, the system is a TDD or FDD (frequency division Duplex ) NB-IoT system.

The terminal reports to the base station that the terminal has the capability to transmit data using the set of carriers using a first dedicated RRC message, wherein the first dedicated RRC message is message 3 or a dedicated RRC message sent by other terminals to the base station. The base station sends a second proprietary RRC message to the terminal, and the terminal receives the second proprietary RRC message, wherein the second proprietary RRC message carries configuration information of a carrier set 0 and configuration information of a carrier set 1 (configuration information of two carrier sets in total), and the configuration information of the carrier set 0 or the carrier set 1 is composed of the configuration information of each carrier contained in the carrier set; for FDD systems, the carrier set 0 is a set of uplink carriers and the carrier set 1 is a set of downlink carriers.

Wherein, carrier set 1 contains 4 carriers (index is 0, 1,2 and 3 in sequence); for one Non-anchor carrier in the carrier set 1, the corresponding configuration information includes frequency location information, downlink valid subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and Narrowband REFERENCE SIGNAL (NRS) power information. Wherein, carrier set 0 contains 4 carriers (index of carriers is 0, 1,2 and 3 in sequence); for one carrier in carrier set 0, the corresponding configuration information includes at least frequency location information.

The base station transmits NPDSCH data to the terminal by using the carrier set 1, and receives NPUSCH format 1 data by using the carrier set 0; the terminal receives NPDSCH data using carrier set 1 and transmits NPUSCH format 1 data to the base station using carrier set 0.

The base station transmits NPDSCH data using carrier set 1, including: the base station transmits downlink allocation NPDCCH data on a designated carrier in the carrier set 1; the designated carrier is the 1 st carrier (index is 0) in the carrier set 1 or the base station is configured to the terminal through a second proprietary RRC message, for example, the 2 nd carrier (index is 1) in the carrier set 1 is configured to the terminal; downlink allocation NPDCCH data is used to schedule NPDSCH data and carries a carrier of 2 bits indicating transmission NPDSCH in carrier set 1. The base station then transmits NPDSCH on the carrier of transmission NPDSCH; for example, a 2-bit value of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier of transmission NPDSCH; at this time, the base station transmits NPDSCH data to the terminal on the carrier with index 2 in carrier set 1.

The terminal receives NPDSCH data using carrier set 1, including: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set 1; the designated carrier is the 1 st carrier (index is 0) in the carrier set 1 or the base station is configured to the terminal through a second proprietary RRC message, for example, the 2 nd carrier (index is 1) in the carrier set 1 is configured to the terminal; downlink allocation NPDCCH data is used to schedule NPDSCH data and carries a carrier of 2 bits indicating transmission NPDSCH in carrier set 1. The terminal then receives NPDSCH on the carrier of transmission NPDSCH; for example, a 2-bit value of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier of transmission NPDSCH; at this time, the terminal receives NPDSCH data on the carrier with index 2 in carrier set 1.

After the base station sends NPDSCH, the base station also needs to receive HARQ-ACK feedback corresponding to NPDSCH; the base station receives HARQ-ACK feedback on the 1 st carrier in carrier set 0. After receiving NPDSCH, the terminal also needs to send HARQ-ACK feedback corresponding to NPDSCH; the terminal sends HARQ-ACK feedback on the 1 st carrier in carrier set 0.

The terminal sends NPUSCH format 1 data by using carrier set 0, which includes: the terminal receives uplink grant NPDCCH data on a designated carrier in the carrier set 1; the designated carrier is the 1 st carrier (index is 0) in the carrier set 1 or the base station is configured through a second proprietary RRC message, for example, the 2 nd carrier in the carrier set 1 is configured; the uplink grant NPDCCH data is used to schedule NPUSCH format 1 and carries 2 bits indicating the carrier in carrier set 0 that NPUSCH format 1 is transmitted. Then, the terminal transmits NPUSCH format 1 data on a carrier wave for transmitting NPUSCH format 1; for example, a 2-bit value of "01" indicates that the carrier with index 1 in carrier set 0 is the carrier transmitting NPUSCH format 1; NPUSCH format 1 data is sent on carrier index 1 in carrier set 0.

Wherein, the base station receives NPUSCH format 1 data by using carrier set 0, which comprises: the base station transmits uplink grant NPDCCH data on a designated carrier in the carrier set 1; the designated carrier is the 1 st carrier (index is 0) in the carrier set 1 or the base station is configured through a second proprietary RRC message, for example, the 2 nd carrier in the carrier set 1 is configured; the uplink grant NPDCCH data is used to schedule NPUSCH format 1 and carries 2 bits indicating the carrier in carrier set 0 that NPUSCH format 1 is transmitted. Then, the base station receives NPUSCH format 1 data on a carrier transmitting NPUSCH format 1; for example, a 2-bit value of "01" indicates that the carrier with index 1 in carrier set 0 is the carrier transmitting NPUSCH format 1; NPUSCH format 1 data is received on carrier index 1 in carrier set 0.

If carrier set 0 contains only 1 carrier, the base station and terminal use carrier set 0 is equivalent to use of the unique carrier in carrier set 0. In this case, the base station and the terminal transmit NPUSCH format 1 data on the unique carrier of carrier set 0; the uplink grant NPDCCH for scheduling NPUSCH format 1 data does not carry a carrier field for indicating "transmit NPUSCH format 1". If carrier set 1 contains only 1 carrier, the base station and terminal use carrier set 1 is equivalent to use the unique carrier in carrier set 1. In this case, the base station and terminal transmit downlink allocations NPDCCH and uplink grants NPDCCH and NPDSCH on the unique carrier of carrier set 1 and downlink allocation NPDCCH does not carry a field indicating "carrier of transmission NPDSCH".

Example seven

In this embodiment, the system is a TDD NB-IoT system.

The preset terminal has the capability of transmitting data by utilizing the carrier wave set; the base station sends a system information block message to the terminal, and the terminal receives the system information block message; the system information block message carries configuration information of a carrier set list (including 4 carrier sets, and indexes are sequentially 0 to 3), and the configuration information of each set is formed by the configuration information of each carrier contained in the carrier set. Wherein each carrier set contains 4 carriers (index 0, 1, 2 and 3 in sequence); for one non-anchor carrier in the carrier set, the corresponding configuration information includes frequency position information, downlink effective subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and narrow-band reference signal NRS power information.

The base station selects one carrier set of the 4 carrier sets according to the terminal identification (UE_ID) and sends paging information by using the selected carrier set; correspondingly, the terminal selects one carrier set of the 4 carrier sets according to the terminal identification and receives the paging message by using the selected carrier set.

Wherein the index of the carrier set selected by the base station and the terminal is the smallest value among all n values (integers of 0 or more and 3 or less) satisfying the following formula:

floor(UE_ID/(N×Ns))modW＜W(0)+W(1)+…+W(n)

N＝min(T,nB),Ns＝max(1,nB/T),W＝W(0)+W(1)+W(2)+W(3)，

wherein, ue_id represents a user identifier, T represents a paging cycle, nB represents the number of paging occasions in one paging cycle, W (i) represents a weight corresponding to a carrier set with index i, W represents a sum of weights corresponding to 4 carrier sets, and n is an index value of an optional carrier set.

As an example:

UE_ID＝131,T＝256,nB＝T/4,W(0)＝1,W(1)＝2,W(2)＝3,W(3)＝4

W(0)+W(1)＝3,W(0)+W(1)+W(2)＝6,W(0)+W(1)+W(2)+W(3)＝W＝10

floor(UE_ID/(N×Ns))modW＝floor(131/64)mod10＝2

2＜W(0)+W(1)＜W(0)+W(1)+W(2)＜W(0)+W(1)+W(2)+W(3)，

In this case, all n values satisfying the condition are n equal to 1,2 and 3, and the minimum value thereof is 1, so that the index of the carrier set selected by the base station and the terminal is 1.

The base station sends the paging message by using the selected carrier wave set, which comprises the following steps: the base station transmits downlink allocation NPDCCH data on a designated carrier in the carrier set; wherein the designated carrier is the 1st carrier (index is 0) in the carrier set or the base station is configured to the terminal through the system information block message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal; the downlink allocation NPDCCH data is used to schedule paging messages and carries 2 bits indicating the carriers in the set of carriers that are used to transmit paging messages. Then, the base station transmits the paging message on a carrier for transmitting the paging message; for example, the 2-bit value is "10", which indicates that the carrier with index 2 in the carrier set is the carrier for transmitting paging message; the base station transmits a paging message to the terminal on the carrier with index 2 in the carrier set.

The terminal receives the paging message by using the selected carrier wave set, and the method comprises the following steps: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set; wherein the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through the system information block message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal; the downlink allocation NPDCCH data is used to schedule paging messages and carries 2 bits indicating the carriers in the set of carriers that are used to transmit paging messages. Then, the terminal receives the paging message on a carrier for transmitting the paging message; for example, the 2-bit value is "10", which indicates that the carrier with index 2 in the carrier set is the carrier for transmitting paging message; the terminal receives the paging message on the carrier indexed by 2 in the carrier set.

It should be noted that if each of the 4 carrier sets contains only 1 carrier, the base station and terminal select carrier sets are equivalent to select carriers. In this case, the base station and terminal transmit downlink allocation NPDCCH data and paging messages on the selected carrier and downlink allocation NPDCCH does not carry a field indicating "carrier of the set of carriers that transmits paging messages".

Example eight

In this embodiment, the system is a TDD or FDD NB-IoT system.

The terminal reports to the terminal the capability to transmit data using the set of carriers using a proprietary RRC message, wherein the proprietary RRC message is message 3 or a proprietary RRC message sent by other terminals to the base station.

In this embodiment, the base station configures, for the terminal, a carrier list that can be used for transmitting downlink allocation NPDCCH through a system information block message; the downlink allocation NPDCCH is used to schedule paging messages.

Wherein, the carrier list includes 4 carriers (indexes are 0 to 3 in sequence), and for any non-anchor carrier in the carrier list, the corresponding configuration information includes: frequency location information, downlink valid subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and narrowband reference signal NRS power information. For FDD systems, the carrier list is a list of downlink carriers.

Wherein, each carrier in the carrier list corresponds to a carrier set, and the carrier set comprises 2 carriers (index is 0 and 1); the carrier set corresponding to the carrier numbered k (the value range is 0 to 3) in the carrier list is still included in the carrier list, for example, the carrier set corresponding to the carrier numbered k includes the carriers numbered k mod 4 and (k+1) mod 4 in the carrier list (as shown in table 1). Where mod represents the remainder taking operation.

TABLE 1

k	Corresponding carrier wave set
		0	0、1
1	1、2
		2	2、3
3	3、0

The base station and the terminal select one carrier from the carrier list according to the terminal identification (ue_id) to transmit downlink allocation NPDCCH, and transmit paging message by using the carrier set corresponding to the carrier.

Wherein, the base station sends the paging message by using the carrier wave set, comprising: the base station transmits downlink allocation NPDCCH data on the 1 st carrier (equivalent to the carrier selected from the carrier list by the base station) in the carrier set; the downlink allocation NPDCCH is used for scheduling paging messages and carries 1 bit to indicate the carrier in the carrier set for transmitting paging messages. Then, the base station transmits the paging message on the carrier wave transmitting the paging message; for example, a 1-bit value of "0" indicates that the carrier with index 0 in the carrier set is the carrier transmitting the paging message; and sending the paging message to the terminal on the carrier with the index of 0 in the carrier set.

Wherein, the terminal receives the paging message by using the carrier wave set, comprising: the terminal receives downlink allocation NPDCCH data on the 1 st carrier (equivalent to the carrier selected by the terminal from the carrier list) in the carrier set; the downlink allocation NPDCCH is used for scheduling paging messages and carries 1 bit to indicate the carrier in the carrier set for transmitting paging messages. Then, the terminal receives the paging message on the carrier wave transmitting the paging message; for example, a 1-bit value of "0" indicates that the carrier with index 0 in the carrier set is the carrier transmitting the paging message; paging messages are received on carriers indexed 0 in the set of carriers.

It should be noted that, if the carrier set corresponding to each carrier in the carrier list only includes 1 carrier, the base station and the terminal fix to transmit the paging message on the carrier transmitting the downlink assignment NPDCCH, and the downlink assignment NPDCCH does not carry a field indicating "carrier transmitting the paging message in the carrier set".

Example nine

In this embodiment, the system is a TDD NB-IoT system.

The preset terminal has the capability of transmitting data by utilizing the carrier wave set; the base station sends a system information block message to the terminal, and the terminal receives the system information block message; the system information block message carries configuration information of a carrier set list (including 4 carrier sets, and indexes are sequentially 0 to 3), and the configuration information of each set is formed by the configuration information of each carrier contained in the set. Wherein each carrier set contains 4 carriers (index 0, 1,2 and 3 in sequence); for one non-anchor carrier in the carrier set, the corresponding configuration information includes frequency location information, downlink valid subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and narrowband reference signal NRS power information.

The base station configures one or more resources for allowing transmission of the message 1 in each of the 4 carrier sets to the terminal through a system information block message; correspondingly, the terminal selects a resource allowing transmission of message 1 to transmit message 1. After the terminal transmits the message 1 on a resource allowing the message 1 to be transmitted, the terminal receives the message 2 and the message 4 and transmits the message 3 and the message 5 by utilizing a carrier set corresponding to the resource transmitting the message 1; after receiving message 1 on a resource that allows message 1 to be transmitted, the base station transmits message 2 and message 4 and receives message 3 and message 5 by using a carrier set corresponding to the resource that receives message 1.

The base station sends the message 2 and the message 4 by using the carrier set corresponding to the resource for receiving the message 1, and the method comprises the following steps: the base station transmits downlink allocation NPDCCH data on a designated carrier in the carrier set; the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal through the system information block message; the downlink allocation NPDCCH data is used to schedule message 2 or message 4 and carries 2 bits indicating the carrier of the set of carriers on which message 2 or message 4 is transmitted. Then, the base station transmits message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 2 bit of "10" indicates that the carrier with index 2 in the carrier set is the carrier that transmitted message 2 or message 4; in this case, the base station transmits message 2 or message 4 to the terminal on the carrier indexed 2 in the carrier set.

After sending the message 4, the base station also needs to receive HARQ-ACK feedback corresponding to the message 4; the base station receives HARQ-ACK feedback on the 1 st carrier in the set of carriers, or on the carrier on which the downlink allocation NPDCCH data was sent, or on the carrier on which message 4 was sent, or on the carrier on which message 1 was received (i.e., the carrier on which the resources of message 1 were received).

The terminal receives the message 2 and the message 4 by using the carrier set corresponding to the resource for sending the message 1, and the method comprises the following steps: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set; the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal through the system information block message; the downlink allocation NPDCCH data is used to schedule message 2 or message 4 and carries 2 bits indicating the carrier of the set of carriers on which message 2 or message 4 is transmitted. Then, the terminal receives message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 2 bit of "10" indicates that the carrier with index 2 in the carrier set is the carrier that transmitted message 2 or message 4; the terminal receives message 2 or message 4 data from the base station on a carrier indexed 2 in the carrier set.

After receiving the message 4, the terminal also needs to send HARQ-ACK feedback corresponding to the message 4; the terminal receives HARQ-ACK feedback on the 1 st carrier in the set of carriers, or on the carrier receiving the downlink allocation NPDCCH data, or on the carrier receiving message 4, or on the carrier sending message 1 (i.e., the carrier where the resources of message 1 are located).

The method for sending the message 3 and the message 5 by the terminal by utilizing the carrier wave set corresponding to the resource for sending the message 1 comprises the following steps: the terminal receives uplink grant NPDCCH data on a designated carrier in the carrier set, wherein the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal through the system information block message, and the uplink grant NPDCCH data is used for scheduling message 3 or message 5 and carries a carrier with 2 bits for indicating transmission of message 3 or message 5 in the carrier set; or the terminal acquires uplink grant information for scheduling message 3 carried by message 2, wherein the uplink grant information comprises 2 bits indicating a carrier wave for transmitting message 3 in the carrier wave set. Then, the terminal transmits the message 3 or the message 5 on the carrier wave transmitting the message 3 or the message 5; for example, a 2 bit of "10" indicates that the carrier with index 2 is the carrier that transmitted message 3 or message 5; the terminal sends message 3 or message 5 on the carrier indexed 2 in the carrier set.

The base station receives the message 3 or the message 5 by using the carrier set corresponding to the resource for receiving the message 1, and includes: the base station transmits uplink grant NPDCCH data on a designated carrier in the carrier set, wherein the designated carrier is the 1 st carrier (index is 0) in the carrier set or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier (index is 1) in the carrier set is configured to the terminal through the system information block message, and the uplink grant NPDCCH data is used for scheduling message 3 or message 5 and carries a carrier with 2 bits for indicating transmission of message 3 or message 5 in the carrier set; or the base station transmits uplink grant information for scheduling message 3 to the terminal using message 2, the uplink grant information including 2 bits indicating a carrier of the carrier set on which message 3 is transmitted. Then, the base station receives message 3 or message 5 on the carrier transmitting message 3 or message 5; for example, a 2 bit of "10" indicates that the carrier with index 2 is the carrier that transmitted message 3 or message 5; message 3 or message 5 is received on a carrier indexed 2 in the carrier set.

In the related art, the random access procedure includes a contention random access procedure (also referred to as an initial random access procedure) and a non-contention random access procedure; the contention random access procedure contains 5 messages (message 1, message 2, message 3, message 4 and message 5); the non-contention random access procedure contains only 2 messages (message 1 and message 2) and message 1 is scheduled by NPDCCH; wherein message 1 is equivalent to a preamble signal, message 2 is also referred to as a Random Access Response (RAR) message; message 1, message 3 and message 5 are messages sent by the terminal to the base station; message 2 and message 4 are messages sent by the base station to the terminal.

In the ninth to fifteenth embodiments of the present invention, if not specifically indicated, the message 1 and the message 2 are the message 1 and the message 2 in the contention random access procedure.

In the present embodiment, the resource that allows transmission of the message 1 in the contention random access procedure is also a resource that allows transmission of the non-contention message 1 (message 1 in the non-contention random access procedure). After the terminal transmits the message 1 on a resource allowing transmission of the non-contention message 1, receiving the non-contention message 2 (the message 2 in the non-contention random access procedure) by using a carrier set corresponding to the resource transmitting the non-contention message 1; after receiving the non-contention message 1 on a resource allowing transmission of the non-contention message 1, the base station transmits the non-contention message 2 using a carrier set corresponding to the resource receiving the non-contention message 1.

Transmitting the non-contention message 2 by using the carrier set corresponding to the resource receiving the non-contention message 1, including: the base station transmits downlink allocation NPDCCH data on a designated carrier in the carrier set; wherein, the downlink allocation NPDCCH data is used for scheduling the non-contention message 2 and carries a carrier for transmitting the non-contention message 2 in the 2-bit indication carrier set; wherein, the appointed carrier wave is the same carrier wave as the carrier wave for sending the downlink allocation NPDCCH data of the message 2 in the process of scheduling contention random access; then, the base station transmits the non-contention message 2 on the carrier transmitting the non-contention message 2.

Receiving the non-contention message 2 by using the carrier set corresponding to the resource for transmitting the non-contention message 1, including: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set; wherein, the downlink allocation NPDCCH data is used for scheduling the non-contention message 2 and carries a carrier for transmitting the non-contention message 2 in the 2-bit indication carrier set; wherein, the appointed carrier wave is the same carrier wave as the carrier wave for sending the downlink allocation NPDCCH data of the message 2 in the process of scheduling contention random access; then, the terminal receives the non-contention message 2 on the carrier transmitting the non-contention message 2.

It should be noted that if each of the 4 carrier sets contains only 1 carrier, the base station and the terminal use the carrier set is equivalent to using the unique carrier in the carrier set. In this case, the base station and the terminal transmit downlink allocation NPDCCH and uplink grant NPDCCH data and message 2 (including contention and non-contention message 2)/message 3/message 4 on unique carriers of the carrier set; the downlink allocation or uplink grant NPDCCH does not carry a field indicating "carrier of transmission message in carrier set".

Examples ten

In this embodiment, the system is a TDD or FDD NB-IoT system.

The terminal implicitly indicates the terminal to have the capability of transmitting data by using the carrier set through the message 1;

wherein the message 1 is transmitted in one of the following ways:

Mode 1: transmitting message 1 on a proprietary message 1 resource (i.e., the terminal has the capability to transmit data using a set of carriers bound to the proprietary message 1 resource); in this case, when the base station receives message 1 on the proprietary message 1 resource, the terminal that sent message 1 by default has the ability to transmit data using the set of carriers; transmitting message 1 on a proprietary message 1 resource at 3.75kHz or 1.25kHz subcarrier spacing; the base station configures proprietary message 1 resources for the terminal through the system information block message.

Mode 2: transmitting message 1 on message 1 resources dedicated to advanced data transfer (EARLY DATA Transmission, EDT for short) (i.e., the terminal has the capability to transmit data using a set of carriers bound with message 1 resources dedicated to EDT); in this case, when the base station receives message 1 on the message 1 resource dedicated to EDT, the terminal that transmits the message 1 by default needs to transmit traffic data in the random access procedure and the terminal has the capability to transmit data using the carrier set; the base station configures message 1 resources dedicated to EDT for the terminal through the system information block message.

In this embodiment, the base station configures a resource list available for transmitting the message 1 to the terminal through a system information block message, and two carrier lists (denoted as a carrier list 0 and a carrier list 1) corresponding to the resource list; all resources in the resource list are distributed within the carrier range contained in carrier list 0.

For one non-anchor carrier in the carrier list 1, the corresponding configuration information includes frequency position information, downlink effective subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and narrowband reference signal NRS power information; for one carrier in carrier list 0, the corresponding configuration information includes at least frequency location information. In addition, for FDD systems, carrier list 0 is a list of uplink carriers and carrier list 1 is a list of downlink carriers.

Wherein each carrier list in the two carrier lists comprises 8 carriers; each resource in the resource list corresponds to two sets of carriers (denoted as carrier set 0 and carrier set 1), each of the two sets of carriers comprising 4 carriers.

Wherein, carrier set 0 corresponding to x resources numbered in the resource list is contained in carrier list 0; for example, carrier set 0 corresponding to resource number x includes carriers numbered y mod 8, (y+1) mod 8, (y+2) mod 8, (y+3) mod 8 in carrier list 0 (as shown in table 2); or the 1 st carrier in the carrier set 0 corresponding to the resource with the number x is the carrier with the number y mod 8 in the carrier list 0, and the numbers of the other 3 carriers are configured through a system information block message, for example, 7 bits Bitmap or 6 bits (which can indicate 64 states and is greater than the combination number 35 corresponding to the C ₇ ³) are used for configuration; wherein the value range of y is 0 to 7, which indicates the number of the carrier with the number x resource in the carrier list 0.

TABLE 2

Corresponding y	Corresponding carrier set 0
		0	0、1、2、3
1	1、2、3、4
		2	2、3、4、5
3	3、4、5、6
		4	4、5、6、7
5	5、6、7、0
		6	6、7、0、1
7	7、0、1、2

Wherein, the carrier set 1 corresponding to the x resource numbered in the resource list is contained in the carrier list 1; for example, the carrier set 1 corresponding to the resource with the number x includes carriers with the number z mod 8, (z+1) mod 8, (z+2) mod 8, (z+3) mod 8 in the carrier list 1, where the value z ranges from 0 to 7, and indicates the number of the 1 st carrier in the carrier set 1 corresponding to the resource with the number x in the carrier list 1, and the base station configures the value z to the terminal through the system information block message; or the serial numbers of all carriers contained in the carrier set 0 corresponding to the x resource are directly configured through the system information block message, for example, 8-bit Bitmap or 7-bit (64 states can be indicated and more than the number of combinations 70 corresponding to C ₈ ⁴) are used for configuration.

The terminal selects one resource from the resource list to send a message 1; after the terminal sends the message 1, the terminal receives the message 2 and the message 4 by using the carrier set 1 corresponding to the resource for sending the message 1, and sends the message 3 and the message 5 by using the carrier set 0 corresponding to the resource for sending the message 1; correspondingly, the base station transmits the message 2 and the message 4 by using the carrier set 1 corresponding to the resource for receiving the message 1, and receives the message 3 and the message 5 by using the carrier set 0 corresponding to the resource for receiving the message 1.

Transmitting the message 2 and the message 4 by using the carrier set 1 corresponding to the resource for receiving the message 1, including: the base station transmits downlink allocation NPDCCH data on a designated carrier in the carrier set 1; the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier in the carrier set 1 is configured to the terminal; the downlink allocation NPDCCH data is used for scheduling message 2 or message 4 and carries 2-bit indication carrier set 1 to transmit message 2 or message 4 carrier; then, the base station transmits message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 2 bit of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier that transmitted message 2 or message 4; message 2 or message 4 is sent to the terminal on carrier index 2 in carrier set 1.

After the base station sends the message 4, the base station also needs to receive HARQ-ACK feedback corresponding to the message 4; the base station receives HARQ-ACK feedback on the carrier receiving message 1 (for FDD systems, the carrier is the uplink carrier) or on the 1 st carrier in the carrier set 0 corresponding to the received message 1 resource.

Receiving the message 2 and the message 4 by using the carrier set 1 corresponding to the resource for sending the message 1, including: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set 1; the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier in the carrier set 1 is configured to the terminal; the downlink allocation NPDCCH data is used for scheduling message 2 or message 4 and carries 2-bit indication carrier set 1 to transmit message 2 or message 4 carrier; then, the terminal receives message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a2 bit of "10" indicates that the carrier indexed 2 in carrier set 1 is the carrier transmitting message 2 or message 4; message 2 or message 4 data is received on carrier index 2 in carrier set 1.

After receiving the message 4, the terminal also needs to send HARQ-ACK feedback corresponding to the message 4; the terminal sends HARQ-ACK feedback to the base station on the carrier wave for sending the message 1 or on the 1 st carrier wave in the carrier wave set 0 corresponding to the resource for sending the message 1.

Transmitting the message 3 or the message 5 by using the carrier set 0 corresponding to the resource for transmitting the message 1, including: the terminal receives uplink grant NPDCCH data on a designated carrier in a carrier set 1 corresponding to the resource of the sent message 1, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier in the carrier set 1 is configured to the terminal, and the uplink grant NPDCCH data is used for scheduling a message 3 or a message 5 and carries a carrier with 2 bits for indicating the transmission of the message 3 or the message 5 in the carrier set 0; or the terminal acquires the uplink grant information for scheduling message 3 carried by message 2, where the uplink grant information includes 2 bits indicating the carrier wave for transmitting message 3 in carrier wave set 0. Then, the terminal transmits the message 3 or the message 5 on the carrier wave transmitting the message 3 or the message 5; for example, a 2bit of "10" indicates that the carrier with index 2 is the carrier that transmitted message 3 or message 5; in this case, the terminal transmits message 3 or message 5 to the base station on carrier index 2 in carrier set 0.

Receiving the message 3 or the message 5 by using the carrier set 0 corresponding to the resource for receiving the message 1, including: the base station sends uplink grant NPDCCH data on a designated carrier in a carrier set 1 corresponding to the received message 1 resource, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to a terminal through a system information block message, for example, the 2 nd carrier in the carrier set 1 is configured to the terminal, and the uplink grant NPDCCH data is used for scheduling a message 3 or a message 5 and carries a carrier with 2 bits indicating that the message 3 or the message 5 is transmitted in the carrier set 0; or the base station transmits the uplink grant information of the scheduling message 3 to the terminal by using the message 2, wherein the uplink grant information comprises 2 bits indicating the carrier for transmitting the message 3 in the carrier set 0. Then, the base station receives message 3 or message 5 on the carrier transmitting message 3 or message 5; for example, a 2 bit of "10" indicates that the carrier with index 2 is the carrier that transmitted message 3 or message 5; in this case, the base station receives message 3 or message 5 on carrier index 2 in carrier set 0.

In the present embodiment, the resource list available for transmission of message 1 in the contention random access procedure is also a resource list available for transmission of non-contention message 1 (message 1 in the non-contention random access procedure). The terminal selects one resource from the resource list to send a non-competition message 1; then, the terminal receives a non-contention message 2 by using a carrier set 1 corresponding to the resource for transmitting the non-contention message 1; correspondingly, the base station sends the non-contention message 2 to the terminal by using the carrier set 1 corresponding to the resource for receiving the non-contention message 1.

Transmitting the non-contention message 2 by using the carrier set 1 corresponding to the received non-contention message 1 resource includes: the base station transmits downlink allocation NPDCCH data on a designated carrier in the carrier set 1; wherein, the downlink allocation NPDCCH data is used for scheduling the non-contention message 2 and carries a carrier of 2-bit indication carrier set 1 for transmitting the non-contention message 2; the designated carrier is the same carrier as the carrier which is used for sending downlink allocation NPDCCH data of the message 2 in the process of scheduling contention random access; then, the base station transmits the non-contention message 2 to the terminal on the carrier transmitting the non-contention message 2.

Receiving the non-contention message 2 by using the carrier set 1 corresponding to the resource for sending the non-contention message 1, including: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set 1; wherein, the downlink allocation NPDCCH data is used for scheduling the non-contention message 2 and carries a carrier of 2-bit indication carrier set 1 for transmitting the non-contention message 2; the designated carrier is the same carrier as the carrier which is used for sending downlink allocation NPDCCH data of the message 2 in the process of scheduling contention random access; then, the terminal receives the non-contention message 2 on the carrier transmitting the non-contention message 2.

It should be noted that, if the carrier set 0 contains only 1 carrier, the base station and the terminal use the carrier set 0 equivalently to use the unique carrier in the carrier set 0; in this case, the base station and the terminal transmit message 3 and message 5 on the unique carrier of carrier set 0; wherein the uplink grant NPDCCH for scheduling message 3 or message 5 or the uplink grant information for scheduling message 3 carried in message 2 does not carry a field indicating "carrier of carrier set 0 transmitting message 3 or message 5". If the carrier set 1 contains only 1 carrier, the base station and the terminal use the carrier set 1 to be equivalent to use the unique carrier in the carrier set 1; in this case, the base station and terminal transmit downlink allocations NPDCCH and uplink grants NPDCCH and messages 2 (including competing and non-competing messages 2) and messages 4 on the unique carriers of carrier set 1; wherein the downlink allocation NPDCCH for scheduling message 2 or message 4 does not carry the field indicating "carrier in carrier set 1 for transmitting message 2 or message 4".

The number of carriers included in the carrier set 0 may be different from the number of carriers included in the carrier set 1. For example, carrier set 0 contains 2 carriers and carrier set 1 contains 4 carriers; in this case, when the base station and the terminal transmit the message 2 or the message 4 using the carrier set 1, the downlink allocation NPDCCH for scheduling the message 2 or the message 4 carries 2 bits indicating the carrier of the message 2 or the message 4 in the carrier set 1; when the base station and the terminal transmit the message 3 or the message 5 by using the carrier set 0, the uplink grant NPDCCH for scheduling the message 3 or the message 5 or the uplink grant information for scheduling the message 3 carried in the message 2 carries 1 bit to indicate the carrier for transmitting the message 3 in the carrier set 0. For another example, carrier set 0 contains 1 carrier and carrier set 1 contains 2 carriers; in this case, when the base station and the terminal transmit the message 2 or the message 4 using the carrier set 1, the downlink allocation NPDCCH for scheduling the message 2 or the message 4 carries 1 bit indicating the carrier for transmitting the message 2 or the message 4 in the carrier set 1; when the base station and the terminal transmit the message 3 or the message 5 using the carrier set 0, the uplink grant NPDCCH for the scheduling message 3 or the message 5 or the uplink grant information for the scheduling message 3 carried in the message 2 does not carry a field indicating "carrier of the carrier set 0 transmitting the message 3".

The downlink allocation NPDCCH for scheduling message 2 or message 4 and the uplink grant NPDCCH payload (i.e., all information carried, also referred to as downlink control information) for scheduling message 3 or message 5 are the same size (in bits) regardless of whether carrier set 0 and carrier set 1 contain the same number of carriers. In this case, the terminal can determine the size of the field of the indication "carrier transmitting message 3 or message 5 in carrier set 0" carried by uplink grant NPDCCH according to the number of carriers contained in carrier set 0; the size of the carrier field, which is carried by the downlink allocation NPDCCH and indicates to transmit message 2 or 4 in carrier set 1, is determined according to the number of carriers contained in carrier set 1.

Example eleven

In this embodiment, the system is a TDD or FDD NB-IoT system.

The terminal reports via message 3 that the terminal has the capability to transmit data using the set of carriers.

Wherein each carrier list of the two carrier lists comprises 8 carriers; each message 1 resource in the resource list corresponds to two sets of carriers (denoted as carrier set 0 and carrier set 1), each of the two sets of carriers comprising 4 carriers.

Wherein, carrier set 0 corresponding to x resources numbered in the resource list is contained in carrier list 0; for example, carrier set 0 corresponding to resource number x includes carriers numbered y mod 8, (y+1) mod 8, (y+2) mod 8, (y+3) mod 8 in carrier list 0 (as shown in table 2); wherein the value range of y is 0 to 7, which indicates that the number x in the resource list is the number of the carrier in which the resource is located in the carrier list 0.

Wherein, the carrier set 1 corresponding to the x resource numbered in the resource list is contained in the carrier list 1; for example, the carrier set 1 corresponding to the resource with the number x includes carriers with the number z mod 8, (z+1) mod 8, (z+2) mod 8, (z+3) mod 8 in the carrier list 1; wherein the value range of z is an integer from 0 to 7, which represents the number of the carrier wave of the transmission message 2 corresponding to the x resource numbered in the resource list in the carrier wave list 1; the base station configures the value of z to the terminal through a system information block message.

The terminal selects one resource from the resource list to send a message 1; after the terminal transmits the message 1, the terminal receives the message 2 on the carrier of the transmission message 2 corresponding to the resource transmitting the message 1, transmits the message 3 (information carrying the terminal having the capability of transmitting data using the carrier set) on the carrier on which the resource transmitting the message 1 is located, receives the message 4 using the carrier set 1 corresponding to the resource transmitting the message 1 and transmits the message 5 using the carrier set 0 corresponding to the resource transmitting the message 1; correspondingly, the base station transmits the message 2 on the carrier of the transmission message 2 corresponding to the resource of the reception message 1, receives the message 3 on the carrier of the resource of the reception message 1, transmits the message 4 by using the carrier set 1 corresponding to the resource of the reception message 1, and receives the message 5 by using the carrier set 0 corresponding to the resource of the reception message 1.

Wherein, sending the message 4 by using the carrier set 1 corresponding to the resource of the received message 1 includes: the base station sends downlink allocation NPDCCH data on a designated carrier in the carrier set 1, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, and the downlink allocation NPDCCH data is used for scheduling the message 4 and carries 2 bits to indicate the carrier in the carrier set 1 for transmitting the message 4. Then, the base station transmits message 4 data on the carrier on which message 4 was transmitted; for example, a2 bit of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier that transmitted message 4; in this case, the base station transmits message 4 to the terminal on carrier index 2 in carrier set 1.

Wherein, receiving the message 4 by using the carrier set 1 corresponding to the resource for sending the message 1 includes: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set 1, where the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, and the downlink allocation NPDCCH data is used for scheduling the message 4 and carries a carrier with 2 bits indicating the transmission of the message 4 in the carrier set 1. Then, the terminal receives message 4 data on the carrier on which message 4 is transmitted; for example, a 2 bit of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier that transmitted message 4; in this case, the terminal receives message 4 on carrier index 2 in carrier set 1.

After sending the message 4, the base station also needs to receive HARQ-ACK feedback corresponding to the message 4; the base station receives HARQ-ACK feedback on the receive message 1 carrier. After receiving the message 4, the terminal also needs to send HARQ-ACK feedback corresponding to the message 4; the terminal sends HARQ-ACK feedback on the send message 1 carrier.

Wherein, sending the message 5 by using the carrier set 0 corresponding to the resource for sending the message 1 includes: the terminal receives uplink grant NPDCCH data on a designated carrier in a carrier set 1 corresponding to the resource of the sent message 1, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, and the uplink grant NPDCCH is used for scheduling the message 5 and carries a carrier of 2-bit indication carrier set 0 for transmitting the message 5. Then, the terminal sends message 5 on the carrier on which message 5 was transmitted; for example, a 2 bit of "10" indicates that the carrier with index 2 is the carrier that transmitted message 5; in this case, the terminal sends message 5 to the base station on carrier index 2 in carrier set 0.

Wherein, receiving the message 5 by using the carrier set 0 corresponding to the resource of the received message 1 includes: the base station sends uplink grant NPDCCH data on a designated carrier in a carrier set 1 corresponding to the received message 1 resource, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, and the uplink grant NPDCCH is used for scheduling the message 5 and carries a carrier of 2-bit indication carrier set 0 for transmitting the message 5. Then, the base station receives message 5 on the carrier on which message 5 was transmitted; for example, a2 bit of "10" indicates that the carrier with index 2 is the carrier that transmitted message 5; in this case, the base station receives message 5 on carrier index 2 in carrier set 0.

Example twelve

In this embodiment, the system is a TDD or FDD NB-IoT system.

In this embodiment, the base station configures, for the terminal, a resource list available for transmitting the non-contention message 1 and two carrier lists (denoted as carrier list 0 and carrier list 1) corresponding to the resource list through a system information block message; all resources in the resource list are distributed within the carriers contained in carrier list 0.

Wherein each of the two carrier lists includes 8 carriers.

Each resource in the resource list corresponds to a carrier set (denoted as carrier set 1); carrier set 1 includes 4 carriers and is included in carrier list 1; alternatively, the carrier set 1 corresponding to the resource with the number x in the resource list includes the carrier with the number z mod8, (z+1) mod8, (z+2) mod8, (z+3) mod8 in the carrier list 1; wherein the value range of z is 0 to 7, which indicates the number of the 1 st carrier in the carrier list 1 in the carrier set 1 corresponding to the x-numbered resource; the base station configures the value of z to the terminal through the system information block message.

The terminal selects one resource from the resource list to send a non-competition message 1; then, the terminal receives a non-contention message 2 by using a carrier set 1 corresponding to the resource for transmitting the non-contention message 1; correspondingly, the base station sends the non-contention message 2 to the terminal by using the carrier set 1 corresponding to the resource for receiving the non-contention message 1.

Wherein, the base station sends the non-contention message 2 by using the carrier set 1 corresponding to the resource for receiving the non-contention message 1, which includes: the base station sends downlink allocation NPDCCH data on a designated carrier in the carrier set 1, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier in the carrier set 1 is configured to the terminal; downlink allocation NPDCCH data is used to schedule non-contention message 2 and carries a carrier of 2 bits indicating that non-contention message 2 is transmitted in carrier set 1. Then, the base station transmits the non-contention message 2 on the carrier transmitting the non-contention message 2; for example, a2 bit of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier transmitting non-contention message 2; the base station transmits a non-contention message 2 to the terminal on the carrier with index 2 in carrier set 1.

Wherein, the terminal receives the non-contention message 2 by using the carrier set 1 corresponding to the resource for sending the non-contention message 1, which includes: the terminal receives downlink allocation NPDCCH data on a designated carrier in the carrier set 1, wherein the designated carrier is the 1 st carrier in the carrier set 1 or the base station is configured to the terminal through a system information block message, for example, the 2 nd carrier in the carrier set 1 is configured to the terminal; downlink allocation NPDCCH data is used to schedule non-contention message 2 and carries a carrier of 2 bits indicating that non-contention message 2 is transmitted in carrier set 1. Then, the terminal receives the non-contention message 2 on the carrier transmitting the non-contention message 2; for example, a 2bit of "10" indicates that the carrier with index 2 in carrier set 1 is the carrier transmitting non-contention message 2; the terminal receives the non-contention message 2 on the carrier with index 2 in carrier set 1.

It should be noted that, if the carrier set 1 contains only 1 carrier, the base station and the terminal use the carrier set 1 equivalently to use the unique carrier in the carrier set 1. In this case, the base station and the terminal transmit downlink allocation NPDCCH and non-contention message 2 on the unique carrier of carrier set 1; wherein the downlink allocation NPDCCH does not carry a field indicating "carrier transmitting non-contention message 2".

Example thirteen

In this embodiment, the system is a TDD or FDD NB-IoT system.

The base station configures a carrier list (equivalent to a carrier set) which can be used for transmitting downlink allocation NPDCCH to the terminal through a system information block message; the downlink allocation NPDCCH is used to schedule paging messages.

The base station and the terminal select one carrier transmission downlink allocation NPDCCH from the carrier list according to the terminal identification (ue_id) and transmit a paging message using the carrier list.

Wherein, the carrier list comprises 16 carriers (indexes are 0 to 15 in sequence); the configuration information includes frequency location information, downlink valid subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and narrowband reference signal NRS power information for any one of the non-anchor carriers in the carrier list. For FDD systems, the carrier list is a list of downlink carriers.

The base station sends a paging message by using the carrier list, including: the 4 bits carried by the downlink allocation NPDCCH indicate the carrier for transmitting the paging message in the carrier list and send the paging message on the carrier for transmitting the paging message; for example, a 4-bit value of "0011" indicates that the carrier with index 3 in the carrier list is the carrier transmitting the paging message, and the paging message is transmitted on the carrier with index 3.

The terminal receives the paging message by using the carrier list, and the method comprises the following steps: acquiring a carrier for transmitting the paging message in the carrier list by using 4 bits carried by downlink allocation NPDCCH and receiving the paging message on the carrier for transmitting the paging message; for example, a 4-bit value of "0011" indicates that the carrier with index 3 in the carrier list is the carrier transmitting the paging message, and the paging message is received on the carrier with index 3.

Examples fourteen

In this embodiment, the system is a TDD NB-IoT system.

The base station configures a resource list available for transmitting the message 1 and a corresponding carrier list (equivalent to a carrier set) to the terminal through a system information block message; all resources in the resource list are distributed over all carriers contained in the carrier list. Wherein, the carrier list comprises 16 carriers (the indexes of the carriers are 0 to 15 in sequence); wherein, for any non-anchor carrier in the carrier list, the corresponding configuration information includes frequency position information, downlink valid subframe information, downlink transmission gap information, an operation mode, configuration information related to the operation mode, and narrowband reference signal NRS power information.

The terminal randomly selects one resource from the resource list to send a message 1; then, the terminal receives the message 2 and the message 4 and sends the message 3 and the message 5 by using the carrier list; accordingly, the base station transmits messages 2 and 4 and receives messages 3 and 5 using the carrier list.

Wherein, the base station sends the message 2 and the message 4 by using the carrier list, and the method comprises the following steps: the base station sends downlink allocation NPDCCH data on the carrier wave of the received message 1; the downlink allocation NPDCCH data is used to schedule message 2 or message 4 and carries 4 bits indicating the carrier of the transmission message 2 or message 4 in the carrier list. Then, the base station transmits message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 4 bit of "0011" indicates that the carrier with index 3 in the carrier list is the carrier that transmitted message 2 or message 4; the base station transmits message 2 or message 4 data to the terminal on the carrier indexed 3 in the carrier list.

Wherein, the terminal receives the message 2 and the message 4 by using the carrier list, and the method comprises the following steps: the terminal receives downlink allocation NPDCCH data on the carrier wave of the sent message 1; the downlink allocation NPDCCH data is used to schedule message 2 or message 4 and carries 4 bits indicating the carrier of the transmission message 2 or message 4 in the carrier list. Then, the terminal receives message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 4 bit of "0011" indicates that the carrier with index 3 in the carrier list is the carrier that transmitted message 2 or message 4; the terminal receives message 2 or message 4 data on the carrier indexed 3 in the carrier list.

After the base station sends the message 4, the base station also needs to receive HARQ-ACK feedback corresponding to the message 4; the base station receives HARQ-ACK feedback on the carrier on which message 1 was received or on the carrier on which message 4 was sent. After receiving the message 4, the terminal also needs to send HARQ-ACK feedback corresponding to the message 4; the terminal sends HARQ-ACK feedback on the carrier on which message 1 was sent or on the carrier on which message 4 was received.

Wherein, the terminal sends the message 3 and the message 5 by using the carrier list, and the method comprises the following steps: the terminal receives uplink grant NPDCCH data on the carrier for sending the message 1, wherein the uplink grant NPDCCH data is used for scheduling the message 3 or the message 5 and carries 4 bits for indicating the carrier for transmitting the message 3 or the message 5 in the carrier list; or the terminal acquires uplink grant information for scheduling message 3 carried by message 2, wherein the uplink grant information comprises 4 bits of carrier waves for transmitting message 3 in the indication carrier wave list. Then, the terminal transmits the message 3 or the message 5 on the carrier wave transmitting the message 3 or the message 5; for example, a4 bit of "0011" indicates that the carrier with index 3 in the carrier list is the carrier that transmitted message 3 or message 5; in this case, the terminal transmits message 3 or message 5 on the carrier indexed 3 in the carrier list.

Wherein, the base station receives the message 3 and the message 5 by using the carrier list, and the method comprises the following steps: the base station transmits uplink grant NPDCCH data on a carrier receiving the message 1, wherein the uplink grant NPDCCH data is used for scheduling the carrier of the message 3 or the message 5 and carries 4 bits for indicating the carrier for transmitting the message 3 or the message 5 in a carrier list; or the base station transmits uplink grant information for scheduling message 3 to the terminal through message 2, wherein the uplink grant information contains 4 bits indicating a carrier for transmitting message 3 in the carrier list. Then, the base station receives message 3 or message 5 on the carrier transmitting message 3 or message 5; for example, a 4 bit of "0011" indicates that the carrier with index 3 in the carrier list is the carrier that transmitted message 3 or message 5; in this case, the base station receives message 3 or message 5 on the carrier indexed 3 in the carrier list.

Example fifteen

In this embodiment, the system is a TDD or FDD NB-IoT system.

The base station configures a resource list available for transmitting the message 1 and two carrier lists corresponding to the resource list (shown as a carrier list 0 and a carrier list 1, which are equivalent to two carrier sets) to the terminal through a system information block message; all resources in the resource list are distributed within the carrier range contained in carrier list 0.

Wherein each of the two carrier lists includes 16 carriers.

The terminal selects one resource from the resource list to send message 1. Then, the terminal receives the message 2 and the message 4 by using the carrier list 1 and sends the message 3 and the message 5 by using the carrier list 0; the base station transmits messages 2 and 4 using carrier list 1 and receives messages 3 and 5 using carrier set 0.

Transmitting message 2 and message 4 using carrier set 1, comprising: the base station sends downlink allocation NPDCCH data on a designated carrier in a carrier list 1, wherein the designated carrier is a carrier corresponding to a resource for receiving a message 1 in the carrier list 1, and the base station is configured to a terminal through a system information block message; downlink allocation NPDCCH data is used for scheduling message 2 or message 4 and carries 4 bits indicating the carrier of message 2 or message 4 in carrier list 1; then, the base station transmits message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 4-bit value of "0010" indicates that the carrier with index 2 in carrier list 1 is the carrier that transmitted message 2 or message 4; in this case, the base station transmits message 2 or message 4 to the terminal on the carrier indexed 2 in carrier list 1.

Receiving message 2 and message 4 with carrier set 1, comprising: the terminal receives downlink allocation NPDCCH data on a designated carrier in a carrier list 1, wherein the designated carrier is a carrier corresponding to a resource for transmitting a message 1 in the carrier list 1, and is configured to the terminal by a base station through a system information block message; downlink allocation NPDCCH data is used for scheduling message 2 or message 4 and carries 4 bits indicating the carrier of message 2 or message 4 in carrier list 1; then, the terminal receives message 2 or message 4 on the carrier transmitting message 2 or message 4; for example, a 4 bit of "0010" indicates that the carrier with index 2 in carrier list 1 is the carrier that transmitted message 2 or message 4; message 2 or message 4 is received on the carrier with index 2.

After the base station sends the message 4, the base station also needs to receive HARQ-ACK feedback corresponding to the message 4; the base station receives HARQ-ACK feedback on the carrier on which message 1 was received. After receiving the message 4, the terminal also needs to send HARQ-ACK feedback corresponding to the message 4; HARQ-ACK feedback is sent on the carrier on which message 1 was sent.

Transmitting message 3 or message 5 using carrier list 0, comprising: the terminal receives uplink grant NPDCCH data on a designated carrier in a carrier list 1, wherein the designated carrier is a carrier corresponding to a resource for transmitting a message 1 in the carrier list 1, and is configured to the terminal by a base station through a system information block message; uplink grant NPDCCH data is used for scheduling message 3 or message 5 and carries 4 bits indicating the carrier in carrier list 0 that transmits message 3 or message 5; or the terminal acquires the uplink grant information for scheduling message 3 carried by message 2, where the uplink grant information includes 4 bits indicating the carrier wave of message 3 in carrier wave list 0. Then, the terminal transmits the message 3 or the message 5 on the carrier wave transmitting the message 3 or the message 5; for example, a 4-bit "0010" indicates that the carrier with index 2 is the carrier that transmitted message 3 or message 5; the terminal sends message 3 or message 5 to the base station on carrier index 2 in carrier list 0.

Receiving message 3 or message 5 using carrier list 0, comprising: the base station sends uplink grant NPDCCH data on a designated carrier in a carrier list 1, wherein the designated carrier is a carrier corresponding to a resource for receiving a message 1 in the carrier list 1, and the base station is configured to a terminal through a system information block message; uplink grant NPDCCH data is used for scheduling message 3 or message 5 and carries 4 bits indicating the carrier in carrier list 0 that transmits message 3 or message 5; or the base station transmits uplink grant information for scheduling message 3 through message 2, the uplink grant information including 4 bits indicating carriers for transmitting message 3 in carrier list 0. Then, the base station receives message 3 or message 5 on the carrier transmitting message 3 or message 5; for example, a 4-bit "0010" indicates that the carrier with index 2 is the carrier that transmitted message 3 or message 5; the base station receives message 3 or message 5 on carrier index 2 in carrier list 0.

Message 2 (including competing message 2 and non-competing message 2) or message 3 or message 4 or message 5 can only be transmitted within the corresponding time window, so message 2 or message 3 or message 4 or message 5 is delay sensitive; if a given message 2 or message 3 or message 4 or message 5 transmission is blocked by other message 2 or message 3 or message 4 or message 5 transmissions employing different or the same coverage levels, the blocking problem cannot be solved by delay scheduling the given message 2 or message 3 or message 4 or message 5; in addition, if message 2 or message 3 or message 4 or message 5 transmission fails, the terminal needs to re-initiate message 1 transmission to re-attempt random access, so that more terminal power consumption and resource overhead may be caused. In the prior art, the base station and the terminal transmit message 2 or message 3 or message 4 or message 5 by using a fixed carrier; the above approach causes more blocking problems, especially when a large number of terminals are accessed simultaneously. In the above-described ninth to fifteenth embodiments, the base station and the terminal can transmit one or more of the message 2, the message 3, the message 4, and the message 5 using the carrier set. The method shown in the above embodiment avoids or alleviates the problem of mutual congestion between the transmissions of message 2, message 3, message 4 and/or message 5 using different coverage levels or the same coverage level, eventually reducing the power consumption of the terminal and avoiding unnecessary resource overhead.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and accordingly the scope of the invention is not limited to the embodiments described above.

Claims

1. A data transmission method, comprising:

The base station sends a carrier configuration message to the terminal, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers;

The base station uses the carrier wave set to send downlink data or receive uplink data; the downlink data is one of the following: downlink service data, message 2 in random access process, message 4 in random access process, paging message; the uplink data is one of the following: uplink service data, a message 3 in a random access process and a message 5 in a random access process;

The base station transmitting downlink data using the carrier set includes: the base station transmits downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling the downlink data and carries indication information of a carrier which transmits the downlink data in the carrier set; the base station transmits the downlink data on the carrier wave for transmitting the downlink data; the designated carrier is the 1 st carrier in the carrier set, or a carrier configured by the base station through the carrier configuration message, or a carrier receiving the message 1 in the random access process, or a carrier selected from the carrier set according to the terminal identification;

the base station receiving uplink data using the carrier set includes:

The base station sends uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling the uplink data and carries indication information of a carrier which receives the uplink data in the carrier set;

the base station receives the uplink data on the carrier wave for receiving the uplink data;

The designated carrier is the 1 st carrier in a carrier set used for sending downlink data, or a carrier for sending a message 2 in a random access process, or a carrier configured by a base station through the carrier configuration message, or a carrier for receiving a message 1 in the random access process.

2. The method of claim 1, wherein,

After the base station sends the downlink data by using the carrier set, the method further includes: receiving HARQ-ACK feedback corresponding to the downlink data according to one of the following modes:

Receiving on the 1 st carrier in the carrier set used for receiving the uplink data;

Receiving on a carrier wave for transmitting the downlink allocation information;

Receiving on a carrier wave transmitting the downlink data;

receiving on a carrier wave which is sent in a downlink before the HARQ-ACK feedback transmission starts;

received on the carrier receiving message 1 during random access.

3. The method of claim 1, wherein the set of carriers used by the base station to transmit downlink data is the same set of carriers as the set of carriers used by the base station to receive uplink data.

4. The method of claim 1, wherein,

The method further comprises at least one of:

the base station configures a carrier list through a carrier configuration message; the carrier set is the carrier list;

The base station configures a carrier set list through the carrier configuration message; the carrier set is one of all carrier sets contained in the carrier set list;

The base station configures a carrier list through the carrier configuration message, wherein all carriers contained in the carrier list are carriers which can be used for transmitting downlink allocation information; the base station configures through the carrier configuration message or determines a first carrier set corresponding to each carrier in the carrier list according to a first preset rule; the carrier wave set is a first carrier wave set corresponding to the carrier wave for transmitting the downlink allocation information;

The base station configures a resource list and a carrier list through the carrier configuration message, wherein all resources contained in the resource list are resources which can be used for transmitting the message 1 in the random access process; the base station configures or determines a second carrier set corresponding to each resource in the resource list according to the carrier configuration message, wherein the second carrier set is contained in the carrier list; the carrier set is a second carrier set corresponding to the resource for receiving the message 1.

5. The method of claim 4, wherein the first preset rule comprises:

In a first carrier set corresponding to a carrier with a number K in the carrier list, a carrier with a number p is a carrier with a number (k+p) mod K in the carrier list; the K is an integer greater than or equal to 0 and smaller than K, the P is an integer greater than or equal to 0 and smaller than P, the K is the number of carriers contained in the carrier list, and the P is the number of carriers contained in the first carrier set.

6. The method of claim 4, wherein the second preset rule comprises:

In the second carrier set corresponding to the resource with the number x in the resource list, the carrier with the number q is the carrier with the number (y+q) mod Y in the carrier list; and Y is an integer greater than or equal to 0 and less than Y, and represents the number of the carrier wave with the number x in the carrier wave list, Q is an integer greater than or equal to 0 and less than Q, Y is the number of carrier waves contained in the carrier wave list, and Q is the number of carrier waves contained in the second carrier wave set.

7. The method of claim 1, wherein the carrier configuration message is one of: downlink special radio resource control RRC message, system information block message.

8. The method of claim 1, wherein prior to the base station transmitting downlink data or receiving uplink data using the set of carriers, further comprising: the base station receives a message 1 in the random access process or a message 3 in the random access process sent by the terminal; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using a carrier set.

9. The method of claim 8, wherein the base station receives the message 1 in one of the following ways: receiving on a proprietary resource bound with the capability to transmit data using a set of carriers; received on a proprietary resource bound to the advanced data transfer EDT.

10. A data transmission method, comprising:

The method comprises the steps that a terminal receives a carrier configuration message sent by a base station, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers;

the terminal uses the carrier wave set to receive downlink data or send uplink data; the downlink data is one of the following: downlink service data, message 2 in random access process, message 4 in random access process, paging message; the upstream data includes one of: uplink service data, a message 3 in a random access process and a message 5 in a random access process;

the terminal receives downlink data by using the carrier wave set, and the method comprises the following steps: the terminal receives downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling the downlink data and carries indication information of a carrier which receives the downlink data in the carrier set; the terminal receives the downlink data on the carrier wave for receiving the downlink data; the designated carrier is the 1 st carrier in the carrier set, or the carrier configured by the base station through the carrier configuration message, or the carrier for sending the message 1 in the random access process, or the carrier selected from the carrier set according to the terminal identification;

The terminal uses the carrier wave set to send uplink data, which comprises the following steps: the terminal receives uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling the uplink data and carries indication information of a carrier which transmits the uplink data in the carrier set; the terminal transmits the uplink data on the carrier wave for transmitting the uplink data; the designated carrier is the 1 st carrier in a carrier set used for receiving downlink data, or a carrier for receiving a message 2 in a random access process, or a carrier configured by a base station through the carrier configuration message, or a carrier for transmitting the message 1 in the random access process.

11. The method of claim 10, wherein,

After the terminal receives the downlink data by using the carrier set, the method further includes: and transmitting HARQ-ACK feedback corresponding to the downlink data according to one of the following modes:

Transmitting on the 1 st carrier in the carrier set used for transmitting the uplink data;

transmitting on a carrier wave receiving the downlink allocation information;

transmitting on a carrier wave receiving the downlink data;

transmitting on a carrier wave for downlink reception before starting the HARQ-ACK feedback transmission;

On the carrier on which message 1 is transmitted during random access.

12. The method of claim 10, wherein the set of carriers used by the terminal to receive downlink data is the same set of carriers used by the terminal to transmit uplink data.

13. The method of claim 10, wherein,

The method further comprises at least one of:

The terminal acquires a carrier list through a carrier configuration message; the carrier set is the carrier list;

The terminal acquires a carrier set list through the carrier configuration message; the carrier set is one of all carrier sets contained in the carrier set list;

The terminal acquires a carrier list through the carrier configuration message, wherein all carriers contained in the carrier list are carriers which can be used for transmitting downlink allocation information; the terminal obtains or determines a first carrier set corresponding to each carrier in the carrier list according to a first preset rule through the carrier configuration message; the carrier wave set is a first carrier wave set corresponding to the carrier wave for receiving the downlink allocation information;

The terminal obtains a resource list and a carrier list through the carrier configuration message, wherein all resources contained in the resource list are resources which can be used for transmitting the message 1 in the random access process; the terminal obtains or determines a second carrier set corresponding to each resource in the resource list according to a second preset rule through the carrier configuration message, wherein the second carrier set is contained in the carrier list; the carrier set is a second carrier set corresponding to the resource for transmitting the message 1.

14. The method of claim 13, wherein the first preset rule comprises:

15. The method of claim 13, wherein the second preset rule comprises:

16. The method of claim 13, wherein the set of carriers is one of all sets of carriers contained in the set of carriers list, comprising: and determining the carrier wave set according to the identification of the terminal or the resource of the message 1 in the random access process.

17. The method of claim 10, wherein the carrier configuration message is one of: downlink special radio resource control RRC message, system information block message.

18. The method of claim 10, wherein before the terminal receives downlink data or transmits uplink data using the set of carriers, further comprising: the terminal sends a message 1 in the random access process or a message 3 in the random access process to the base station; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using a carrier set.

19. The method of claim 18, wherein the terminal sends the message 1 in one of the following ways: transmitting on a dedicated resource bound to the ability to transmit data using a set of carriers; sent on a proprietary resource bound to the advanced data transfer EDT.

20. The method of claim 10, wherein the terminal determines whether the downlink allocation information carries indication information of a carrier for receiving downlink data or whether the uplink grant information carries indication information of a carrier for transmitting uplink data according to the number of carriers included in the carrier set.

21. A data transmission apparatus, comprising:

the first sending module is used for sending a carrier configuration message to the terminal, wherein the carrier configuration message carries configuration information of a carrier set, and the carrier set comprises one or more carriers;

The first transceiver module is used for sending downlink data or receiving uplink data by using the carrier wave set; the downlink data is one of the following: downlink service data, message 2 in random access process, message 4 in random access process, paging message; the uplink data is one of the following: uplink service data, a message 3 in a random access process and a message 5 in a random access process;

The first transceiver module is specifically configured to: transmitting downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling the downlink data and carries indication information of a carrier for transmitting the downlink data in the carrier set; transmitting the downlink data on the carrier wave for transmitting the downlink data; the designated carrier is the 1 st carrier in the carrier set, or a carrier configured by the base station through the carrier configuration message, or a carrier receiving the message 1 in the random access process, or a carrier selected from the carrier set according to the terminal identification;

The first transceiver module is specifically configured to: transmitting uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling the uplink data and carries indication information of a carrier which receives the uplink data in the carrier set; receiving the uplink data on the carrier wave for receiving the uplink data; the designated carrier is the 1 st carrier in a carrier set used for sending downlink data, or a carrier for sending a message 2 in a random access process, or a carrier configured by a base station through the carrier configuration message, or a carrier for receiving a message 1 in the random access process.

22. The apparatus as recited in claim 21, further comprising: the first receiving module is configured to receive HARQ-ACK feedback corresponding to the downlink data according to one of the following manners:

Receiving on a carrier wave transmitting the downlink data;

received on the carrier receiving message 1 during random access.

23. The apparatus of claim 21, wherein the carrier configuration message is one of: downlink special radio resource control RRC message, system information block message.

24. The apparatus as recited in claim 21, further comprising:

The second receiving module is used for receiving a message 1 in the random access process or a message 3 in the random access process sent by the terminal; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using a carrier set.

25. A data transmission apparatus, comprising:

A third receiving module, configured to receive a carrier configuration message sent by a base station, where the carrier configuration message carries configuration information of a carrier set, and the carrier set includes one or more carriers;

The second transceiver module is used for receiving downlink data or sending uplink data by using the carrier wave set; the downlink data is one of the following: downlink service data, message 2 in random access process, message 4 in random access process, paging message; the upstream data includes one of: uplink service data, a message 3 in a random access process and a message 5 in a random access process;

the second transceiver module is specifically configured to: receiving downlink allocation information on a designated carrier, wherein the downlink allocation information is used for scheduling the downlink data and carries indication information of a carrier which receives the downlink data in the carrier set; receiving the downlink data on the carrier wave for receiving the downlink data; the designated carrier is the 1 st carrier in the carrier set, or the carrier configured by the base station through the carrier configuration message, or the carrier for sending the message 1 in the random access process, or the carrier selected from the carrier set according to the terminal identification;

The second transceiver module is specifically configured to: receiving uplink grant information on a designated carrier, wherein the uplink grant information is used for scheduling the uplink data and carries indication information of a carrier which transmits the uplink data in the carrier set; transmitting the uplink data on the carrier wave for transmitting the uplink data; the designated carrier is the 1 st carrier in a carrier set used for receiving downlink data, or a carrier for receiving a message 2 in a random access process, or a carrier configured by a base station through the carrier configuration message, or a carrier for transmitting the message 1 in the random access process.

26. The apparatus as recited in claim 25, further comprising: the second sending module is configured to send HARQ-ACK feedback corresponding to the downlink data according to one of the following manners:

transmitting on a carrier wave receiving the downlink allocation information;

transmitting on a carrier wave receiving the downlink data;

On the carrier on which message 1 is transmitted during random access.

27. The apparatus of claim 25, wherein the carrier configuration message is one of: downlink special radio resource control RRC message, system information block message.

28. The apparatus as recited in claim 25, further comprising:

A third sending module, configured to send a message 1 in a random access procedure or a message 3 in a random access procedure to a base station; the message 1 or the message 3 carries indication information that the terminal has the capability of transmitting data by using a carrier set.

29. A storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the data transmission method of any one of claims 1 to 9 or claims 10 to 20.

30. A base station comprising at least a memory, a processor, the memory having stored thereon a computer program, characterized in that the processor, when executing the computer program on the memory, implements the steps of the method according to any of claims 1 to 9.

31. A terminal comprising at least a memory, a processor, the memory having stored thereon a computer program, characterized in that the processor, when executing the computer program on the memory, implements the steps of the method according to any of claims 10 to 20.