Base station, user terminal and carrier scheduling indication method

Abstract

The embodiment of the present invention discloses a base station, a user terminal and a carrier scheduling indication method, which relates to the field of communications and solves the problem of large signaling overhead caused by a large number of configured carriers of the base station. The specific scheme is: the processing unit generates a CAI field of the current scheduled carrier according to the scheduling status of all configured carriers; the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, M indicating that the current scheduled carrier is the Mth scheduled carrier from the first configured carrier to the current scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier; the sending unit carries the CAI field generated by the processing unit in the DCI and sends it to the UE through the current scheduled carrier. The present invention is used in the process of carrier scheduling indication.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to a base station, a user terminal and a carrier scheduling indication method. Background Art

[0002] In the evolution process of the Long Term Evolution (LTE) system, in order to improve the spectrum bandwidth of the system, the Third Generation Partnership Project (3GPP) proposed the carrier aggregation technology, in which the carrier aggregation technology aggregates multiple continuous or discontinuous carriers together to form a wider spectrum. When the base station is configured with multiple carriers, data can be sent to the user terminal (UE) simultaneously through the configured multiple carriers. When the base station sends data to the UE through the scheduling carrier (the carrier used by the base station to transmit data) in the configured carrier (the carrier configured by the base station), the base station needs to send downlink control information (DCI) to the UE through each scheduling carrier to indicate the physical resource blocks occupied by the UE itself on the scheduling carrier, the modulation and coding method used, and other information, so that the UE can receive data according to the received DCI.

[0003] In the prior art, in order to enable the UE to obtain the scheduling status of all configured carriers of the base station, the base station can add a downlink assignment indication (DAI) 2 field in the DCI sent to the UE to indicate the scheduling status of other configured carriers except the current scheduled carrier (the carrier transmitting the DCI), wherein the number of bits of the DAI2 field is determined according to the number of configured carriers of the base station, and is numerically equal to the number of configured carriers of the base station minus 1.

[0004] There are at least the following problems in the prior art. Since the DAI2 field in the prior art must be able to indicate the scheduling status of all configured carriers except the currently scheduled carrier, the number of bits in the DAI2 field is numerically equal to the number of configured carriers of the base station minus 1. In this way, when the number of configured carriers of the base station is large, the DAI2 field will contain more bits, making the DCI longer, thereby resulting in greater signaling overhead. Summary of the invention

[0005] The present invention provides a base station, a user terminal and a carrier scheduling indication method, which solves the problem of large signaling overhead caused by a large number of configured carriers of the base station.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A first aspect of the present invention provides a base station, the base station comprising: a processing unit and a sending unit;

[0008] The processing unit is used to generate a carrier allocation indication CAI field of a currently scheduled carrier according to the scheduling conditions of all configured carriers; the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the currently scheduled carrier, where M indicates that from the first configured carrier to the currently scheduled carrier, the currently scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier;

[0009] The sending unit is configured to carry the CAI field generated by the processing unit in downlink control information DCI and send it to a user terminal UE through the current scheduled carrier;

[0010] Wherein, M is an integer greater than or equal to 1.

[0011] In conjunction with the first aspect of the present invention, in a possible implementation manner, when the CAI field is used to indicate the total number of scheduled carriers in all the configured carriers and the cumulative index value M of the currently scheduled carrier,

[0012] The processing unit is specifically configured to obtain the total number of the scheduled carriers and obtain M; obtain a first code according to the total number of the scheduled carriers and a preset first mapping relationship, and obtain a second code according to M and a preset second mapping relationship; and combine the first code and the second code to generate the CAI field;

[0013] The first mapping relationship is used to indicate the first encoding corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second encoding corresponding to the M.

[0014] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the first encoding is The number of bits of the second code is

[0015] Wherein, N is the total number of all configured carriers; Indicates the value obtained by rounding log2N upwards.

[0016] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner,

[0017] The processing unit is further configured to determine before obtaining the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and obtaining the second code according to the M and the preset second mapping relationship. Is it greater than 2?

[0018] The processing unit is specifically used when When M is not greater than 2, the first coding is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the second coding is obtained according to the M and the second mapping relationship.

[0019] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner,

[0020] The processing unit is also used when When M is greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the third code is obtained according to M and a preset third mapping relationship; the first code and the third code are combined to generate the CAI field;

[0021] The third mapping relationship is used to indicate the third encoding corresponding to M, and the number of bits of the third encoding is smaller than the number of bits of the second encoding.

[0022] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner,

[0023] The first code is located at the front of the CAI field bits, the second code is located after the CAI field bits;

[0024] or,

[0025] The first code is located after the CAI field. bits, the second code is located at the front of the CAI field bits.

[0026] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner,

[0027] The number of bits in the CAI field is The a is greater than or equal to 2 and less than integer;

[0028] The first code is located at the front of the CAI field bits, the third code is located at the last a bits of the CAI field;

[0029] or,

[0030] The first code is located after the CAI field. bits, and the third code is located at the first a bits of the CAI field.

[0031] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier,

[0032] The processing unit is specifically used to obtain the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier; and generate the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier and a preset fourth mapping relationship.

[0033] In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the fourth mapping relationship is used to indicate a fourth code corresponding to the number of the previous scheduled carrier, and a fifth code corresponding to the number of the next scheduled carrier;

[0034] The processing unit is specifically used to obtain the fourth code according to the number of the previous scheduled carrier and the fourth mapping relationship, and to obtain the fifth code according to the number of the next scheduled carrier and the fourth mapping relationship; and to combine the fourth code and the fifth code to generate the CAI field.

[0035] In combination with the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the fourth mapping relationship is used to indicate a sixth code corresponding to the number of the previous scheduled carrier and the number of the next scheduled carrier after joint encoding; the number of bits of the sixth code is less than the sum of the number of bits of the fourth code and the fifth code;

[0036] The processing unit is specifically configured to obtain the sixth code according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the fourth mapping relationship, and use the sixth code as the CAI field.

[0037] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the CAI field is

[0038] The fourth code is located at the front of the CAI field bits, the fifth code is located after the CAI field bits;

[0039] or,

[0040] The fourth code is located after the CAI field. bits, the fifth code is located at the front of the CAI field bits.

[0041] In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the CAI field is

[0042] A second aspect of the present invention provides a user terminal UE, the UE comprising: a receiving unit and a processing unit;

[0043] The receiving unit is used to receive downlink control information DCI carrying a carrier allocation indication CAI field sent by a base station through at least one currently scheduled carrier; the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and a cumulative index value M of the currently scheduled carrier, wherein M indicates that from the first configured carrier to the currently scheduled carrier, the currently scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier;

[0044] The processing unit is used to obtain the CAI field in the DCI received by the receiving unit, so as to obtain the scheduling status of all the configured carriers.

[0045] In combination with the second aspect of the present invention, in a possible implementation manner, the UE further includes: a sending unit;

[0046] The sending unit is configured to send hybrid automatic repeat request HARQ information to the base station after the processing unit obtains the CAI field in the DCI;

[0047] The HARQ information is used to feedback whether the data sent by the base station through all scheduled carriers is correctly received, and the number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each scheduled carrier is correctly received.

[0048] In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier,

[0049] The CAI field includes a first code and a second code, the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second code is a code obtained by the base station according to M and a preset second mapping relationship, and the second mapping relationship is used to indicate the second code corresponding to M;

[0050] Alternatively, the CAI field includes the first code and a third code, the third code is a code obtained by the base station based on the M and a preset third mapping relationship, and the third mapping relationship is used to indicate the third code corresponding to the M; wherein the number of bits of the third code is less than the number of bits of the second code.

[0051] In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier,

[0052] The CAI field includes a fourth code and a fifth code; the fourth code is a code obtained by the base station according to the number of the previous scheduled carrier and a preset fourth mapping relationship, and the fifth code is a code obtained by the base station according to the number of the subsequent scheduled carrier and the fourth mapping relationship, and the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier, and the fifth code corresponding to the number of the subsequent scheduled carrier;

[0053] Alternatively, the CAI field is the sixth code; the sixth code is the code obtained by the base station according to the number of the previous scheduled carrier, the number of the subsequent scheduled carrier and a preset fourth mapping relationship, and the fourth mapping relationship is used to indicate the sixth code corresponding to the joint encoding of the number of the previous scheduled carrier and the number of the subsequent scheduled carrier.

[0054] In combination with the second aspect and the above possible implementation manner, in another possible implementation manner,

[0055] The processing unit is further configured to determine the total number of the scheduled carriers and determine a cumulative index value M of the at least one currently scheduled carrier according to the CAI field;

[0056] The sending unit is specifically configured to send the HARQ information to the base station according to the total number of the scheduled carriers determined by the processing unit and the cumulative index value M of the at least one currently scheduled carrier.

[0057] In combination with the second aspect and the above possible implementation manner, in another possible implementation manner,

[0058] The processing unit is further configured to determine, according to the CAI field, a number of a previous scheduled carrier and a number of a subsequent scheduled carrier of the at least one currently scheduled carrier, and determine a total number of scheduled carriers according to the number of a previous scheduled carrier and a number of a subsequent scheduled carrier of the at least one currently scheduled carrier;

[0059] The sending unit is specifically configured to send the HARQ information to the base station according to the total number of the scheduled carriers determined by the processing unit and the number of the previous scheduled carrier and the number of the next scheduled carrier of the at least one currently scheduled carrier.

[0060] In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field includes the first encoding and the second encoding,

[0061] The processing unit is specifically configured to obtain, for the CAI field, the total number of the scheduled carriers according to the first mapping relationship and the first encoding, and to obtain M according to the second mapping relationship and the second encoding.

[0062] In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field includes the first encoding and the third encoding,

[0063] The processing unit is specifically configured to obtain, for the CAI field, the total number of the scheduled carriers according to the first mapping relationship and the first encoding, and obtain M according to the third mapping relationship and the third encoding.

[0064] In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field includes the fourth code and the fifth code,

[0065] The processing unit is specifically used to obtain the number of the previous scheduled carrier according to the fourth coding and the fourth mapping relationship for the CAI field, and to obtain the number of the next scheduled carrier according to the fifth coding and the fourth mapping relationship.

[0066] In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field is the sixth encoding,

[0067] The processing unit is specifically configured to obtain, for the CAI field, the number of the previous scheduled carrier and the number of the next scheduled carrier according to the sixth encoding and the fourth mapping relationship.

[0068] A third aspect of the present invention provides a carrier scheduling indication method, the method comprising:

[0069] The base station generates a carrier allocation indication CAI field of the currently scheduled carrier according to the scheduling status of all configured carriers configured by itself; the CAI field is used to indicate the total number of scheduled carriers in all the configured carriers and the cumulative index value M of the currently scheduled carrier, where M indicates that from the first configured carrier to the currently scheduled carrier, the currently scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier;

[0070] The base station carries the CAI field in downlink control information DCI and sends it to the user terminal UE through the current scheduled carrier;

[0071] Wherein, M is an integer greater than or equal to 1.

[0072] In conjunction with the third aspect of the present invention, in a possible implementation manner, when the CAI field is used to indicate the total number of scheduled carriers in all the configured carriers and the cumulative index value M of the currently scheduled carrier, the base station generates a carrier allocation indication CAI field of the currently scheduled carrier according to the scheduling status of all configured carriers configured by itself, including:

[0073] The base station obtains the total number of the scheduled carriers and obtains M;

[0074] The base station obtains a first code according to the total number of the scheduled carriers and a preset first mapping relationship, and obtains a second code according to M and a preset second mapping relationship; wherein the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to M;

[0075] The base station combines the first code and the second code to generate the CAI field.

[0076] In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the first encoding is The number of bits of the second code is

[0077] Wherein, N is the total number of all configured carriers; Indicates the value obtained by rounding log2N upwards.

[0078] In combination with the third aspect and the foregoing possible implementation manner, in another possible implementation manner, before the base station obtains the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and obtains the second code according to M and the preset second mapping relationship, it also includes:

[0079] The base station determines Is it greater than 2?

[0080] The base station acquires a first code according to the total number of the scheduled carriers and a preset first mapping relationship, and acquires a second code according to M and a preset second mapping relationship, including:

[0081] when When M is not greater than 2, the base station obtains the first coding according to the total number of the scheduled carriers and the first mapping relationship, and obtains the second coding according to M and the second mapping relationship.

[0082] In combination with the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the method further includes:

[0083] when When M is greater than 2, the base station obtains the first code according to the total number of the scheduled carriers and the first mapping relationship, and obtains the third code according to M and a preset third mapping relationship; the third mapping relationship is used to indicate the third code corresponding to M, and the number of bits of the third code is less than the number of bits of the second code;

[0084] The base station combines the first code and the third code to generate the CAI field.

[0085] In combination with the third aspect and the above possible implementation manner, in another possible implementation manner,

[0086] The first code is located at the front of the CAI field bits, the second code is located after the CAI field bits;

[0087] or,

[0088] The first code is located after the CAI field. bits, the second code is located at the front of the CAI field bits.

[0089] In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the CAI field is The a is greater than or equal to 2 and less than integer;

[0090] The first code is located at the front of the CAI field bits, the third code is located at the last a bits of the CAI field;

[0091] or,

[0092] The first code is located after the CAI field. bits, and the third code is located at the first a bits of the CAI field.

[0093] In combination with the third aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier, the base station generates a carrier allocation indication CAI field of the currently scheduled carrier according to the scheduling status of all configured carriers configured by itself, including:

[0094] The base station obtains a number of a previous scheduled carrier and a number of a subsequent scheduled carrier of the currently scheduled carrier;

[0095] The base station generates the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier, and a preset fourth mapping relationship.

[0096] In combination with the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the fourth mapping relationship is used to indicate a fourth code corresponding to the number of the previous scheduled carrier, and a fifth code corresponding to the number of the next scheduled carrier;

[0097] The base station generates the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier, and a preset fourth mapping relationship, including:

[0098] The base station acquires the fourth code according to the number of the previous scheduled carrier and the fourth mapping relationship, and acquires the fifth code according to the number of the next scheduled carrier and the fourth mapping relationship;

[0099] The base station combines the fourth code and the fifth code to generate the CAI field.

[0100] In combination with the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the fourth mapping relationship is used to indicate a sixth code corresponding to the number of the previous scheduled carrier and the number of the next scheduled carrier after joint encoding; the number of bits of the sixth code is less than the sum of the number of bits of the fourth code and the fifth code;

[0101] The base station generates the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier, and a preset fourth mapping relationship, including:

[0102] Acquiring, by the base station, the sixth code according to the number of the previous scheduled carrier, the number of the next scheduled carrier, and the fourth mapping relationship;

[0103] The base station uses the sixth code as the CAI field.

[0104] In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the CAI field is

[0105] The fourth code is located at the front of the CAI field bits, the fifth code is located after the CAI field bits;

[0106] or,

[0107] The fourth code is located after the CAI field. bits, the fifth code is located at the front of the CAI field bits.

[0108] In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the number of bits of the CAI field is

[0109] A fourth aspect of the present invention provides a carrier scheduling indication method, including:

[0110] The user terminal UE receives downlink control information DCI carrying a carrier allocation indication CAI field sent by the base station through at least one currently scheduled carrier; the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier, and the M indicates that from the first configured carrier to the currently scheduled carrier, the currently scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier;

[0111] The UE obtains the CAI field in the DCI so as to learn the scheduling status of all configured carriers.

[0112] In conjunction with the fourth aspect of the present invention, in a possible implementation manner, after the UE obtains the CAI field in the DCI, the method further includes:

[0113] The UE sends hybrid automatic repeat request (HARQ) information to the base station;

[0114] The HARQ information is used to feedback whether the data sent by the base station through all scheduled carriers is correctly received, and the number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each scheduled carrier is correctly received.

[0115] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier,

[0116] The CAI field includes a first code and a second code, the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second code is a code obtained by the base station according to M and a preset second mapping relationship, and the second mapping relationship is used to indicate the second code corresponding to M;

[0117] Alternatively, the CAI field includes the first code and a third code, the third code is a code obtained by the base station based on the M and a preset third mapping relationship, and the third mapping relationship is used to indicate the third code corresponding to the M; wherein the number of bits of the third code is less than the number of bits of the second code.

[0118] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier,

[0119] The CAI field includes a fourth code and a fifth code; the fourth code is a code obtained by the base station according to the number of the previous scheduled carrier and a preset fourth mapping relationship, and the fifth code is a code obtained by the base station according to the number of the subsequent scheduled carrier and the fourth mapping relationship, and the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier, and the fifth code corresponding to the number of the subsequent scheduled carrier;

[0120] Alternatively, the CAI field is the sixth code; the sixth code is the code obtained by the base station according to the number of the previous scheduled carrier, the number of the subsequent scheduled carrier and a preset fourth mapping relationship, and the fourth mapping relationship is used to indicate the sixth code corresponding to the joint encoding of the number of the previous scheduled carrier and the number of the subsequent scheduled carrier.

[0121] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the UE sending hybrid automatic repeat request HARQ information to the base station includes:

[0122] The UE determines, according to the CAI field, a total number of the scheduled carriers and a cumulative index value M of the at least one currently scheduled carrier;

[0123] The UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the cumulative index value M of the at least one currently scheduled carrier.

[0124] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the UE sending hybrid automatic repeat request HARQ information to the base station includes:

[0125] The UE determines, according to the CAI field, a number of a previous scheduled carrier and a number of a next scheduled carrier in the at least one currently scheduled carrier;

[0126] The UE determines, according to a number of a previous scheduled carrier and a number of a subsequent scheduled carrier of the at least one currently scheduled carrier, a total number of scheduled carriers;

[0127] The UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the number of the previous scheduled carrier and the number of the next scheduled carrier of the at least one currently scheduled carrier.

[0128] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field includes the first encoding and the second encoding, the UE determines, according to the CAI field, the total number of the scheduled carriers, and determines the cumulative index value M of the at least one currently scheduled carrier, including:

[0129] For the CAI field, the UE obtains the total number of the scheduled carriers according to the first mapping relationship and the first encoding, and obtains the M according to the second mapping relationship and the second encoding.

[0130] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field includes the first code and the third code, the UE determines, according to the CAI field, the total number of the scheduled carriers, and determines the cumulative index value M of the at least one currently scheduled carrier, including:

[0131] For the CAI field, the UE obtains the total number of the scheduled carriers according to the first mapping relationship and the first coding, and obtains the M according to the third mapping relationship and the third coding.

[0132] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field includes the fourth code and the fifth code, the UE determines, according to the CAI field, a number of a previous scheduled carrier and a number of a subsequent scheduled carrier of the at least one currently scheduled carrier, including:

[0133] For the CAI field, the UE obtains the number of the previous scheduled carrier according to the fourth coding and the fourth mapping relationship, and obtains the number of the next scheduled carrier according to the fifth coding and the fourth mapping relationship.

[0134] In combination with the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, when the CAI field is the sixth encoding, the UE determines, according to the CAI field, a number of a previous scheduled carrier and a number of a subsequent scheduled carrier of the at least one currently scheduled carrier, including:

[0135] For the CAI field, the UE obtains the number of the previous scheduled carrier and the number of the next scheduled carrier according to the sixth encoding and the fourth mapping relationship.

[0136] The base station, user terminal and carrier scheduling indication method provided by the embodiment of the present invention, after the base station generates the CAI field of the current scheduled carrier according to the scheduling conditions of all configured carriers configured by itself, the generated CAI field is carried in the DCI and sent to the UE through the current scheduled carrier. Because in the present invention, the CAI field for carrier scheduling indication sent by the base station to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field for carrier scheduling indication sent by the base station to the UE indicates the scheduling conditions of each configured carrier in all other configured carriers except the current scheduled carrier, and because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, therefore, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, so that the field length of the DCI is reduced, thereby reducing the signaling overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0137] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0138] Figure 1 A schematic diagram of the composition of a base station provided in one embodiment of the present invention;

[0139] Figure 2 A schematic diagram of the composition of a UE provided in another embodiment of the present invention;

[0140] Figure 3 A schematic diagram of the composition of another UE provided by another embodiment of the present invention;

[0141] Figure 4 A flowchart of a carrier scheduling indication method provided by another embodiment of the present invention;

[0142] Figure 5 A flowchart of a carrier scheduling indication method provided by another embodiment of the present invention;

[0143] Figure 6 A flowchart of a carrier scheduling indication method provided by another embodiment of the present invention;

[0144] Figure 7 A flowchart of another carrier scheduling indication method provided by another embodiment of the present invention;

[0145] Figure 8 A flowchart of another carrier scheduling indication method provided by another embodiment of the present invention;

[0146] Fig. 9 A flowchart of another carrier scheduling indication method provided by another embodiment of the present invention;

[0147] Fig.10 A schematic diagram of the composition of a base station provided in another embodiment of the present invention;

[0148] Fig.11 A schematic diagram of the composition of a UE provided in another embodiment of the present invention. DETAILED DESCRIPTION

[0149] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0150] Additionally, the terms "system" and "network" are often used interchangeably herein.

[0151] Symbols in the embodiments of the present invention Indicates rounding up.

[0152] An embodiment of the present invention provides a base station, such as Figure 1 As shown, the base station includes: a processing unit 11 and a sending unit 12.

[0153] The processing unit 11 is used to generate a carrier assignment indication (English: Carrier Assignment Indication, CAI for short) field of the currently scheduled carrier according to the scheduling conditions of all configured carriers.

[0154] Among them, the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, where M means that from the first configured carrier to the current scheduled carrier, the current scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier.

[0155] The sending unit 12 is configured to carry the CAI field generated by the processing unit 11 in the DCI and send it to the UE via the currently scheduled carrier.

[0156] Wherein, M is an integer greater than or equal to 1.

[0157] In the embodiment of the present invention, further, when the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the currently scheduled carrier,

[0158] Processing unit 11 is specifically used to obtain the total number of scheduled carriers and obtain M; obtain a first code based on the total number of scheduled carriers and a preset first mapping relationship, and obtain a second code based on M and a preset second mapping relationship; combine the first code and the second code to generate a CAI field.

[0159] The first mapping relationship is used to indicate the first encoding corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second encoding corresponding to the M.

[0160] Optionally, the number of bits of the first encoding and the second encoding is

[0161] Wherein, N is the total number of all configured carriers; Indicates the value obtained by rounding log2N upwards.

[0162] In the embodiment of the present invention, further, the processing unit 11 is also used to obtain the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and obtain the second code according to the M and the preset second mapping relationship, before determining Is it greater than 2?

[0163] The processing unit 11 is specifically used for When M is not greater than 2, a first code is obtained according to the total number of scheduled carriers and the first mapping relationship, and a second code is obtained according to M and the second mapping relationship.

[0164] In the embodiment of the present invention, further, the processing unit 11 is also used when When it is greater than 2, the first code is obtained according to the total number of scheduled carriers and the first mapping relationship, and the third code is obtained according to M and a preset third mapping relationship; the first code and the third code are combined to generate a CAI field.

[0165] The third mapping relationship is used to indicate the third encoding corresponding to M, and the number of bits of the third encoding is smaller than the number of bits of the second encoding.

[0166] In the embodiment of the present invention, further, when the CAI field is generated according to the first encoding and the second encoding, the number of bits of the CAI field is

[0167] The first code is located at the front of the CAI field. bits, the second code is located after the CAI field bits, or the first code is located after the CAI field bits, the second code is located at the front of the CAI field bits.

[0168] In the embodiment of the present invention, further, when the CAI field is generated according to the first encoding and the third encoding, the number of bits of the CAI field is

[0169] Where a is greater than or equal to 2 and less than The first code is located at the front of the CAI field. bits, the third code is located at the last a bits of the CAI field, or the first code is located at the last a bits of the CAI field. bits, and the third code is located in the first a bits of the CAI field.

[0170] In the embodiment of the present invention, further, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier,

[0171] The processing unit 11 is specifically configured to obtain the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier; and generate a CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier and a preset fourth mapping relationship.

[0172] In the embodiment of the present invention, further, the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier and the fifth code corresponding to the number of the next scheduled carrier.

[0173] The processing unit 11 is specifically used to obtain the fourth code according to the number of the previous scheduled carrier and the fourth mapping relationship, and to obtain the fifth code according to the number of the next scheduled carrier and the fourth mapping relationship; and to combine the fourth code and the fifth code to generate the CAI field.

[0174] In an embodiment of the present invention, further, the fourth mapping relationship is used to indicate the sixth code corresponding to the joint coding of the number of the previous scheduled carrier and the number of the next scheduled carrier; the number of bits of the sixth code is less than the sum of the number of bits of the fourth code and the fifth code.

[0175] The processing unit 11 is specifically configured to obtain the sixth code according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the fourth mapping relationship, and use the sixth code as the CAI field.

[0176] In the embodiment of the present invention, further, when the CAI field is generated according to the fourth encoding and the fifth encoding, the number of bits of the CAI field is

[0177] Among them, the fourth code is located at the front of the CAI field bits, the fifth code is located after the CAI field bits; or, the fourth code is located after the CAI field bits, the fifth code is located at the front of the CAI field bits.

[0178] In the embodiment of the present invention, further, when the sixth code is used as the CAI field, the number of bits of the CAI field may be The specific encoding method of the sixth encoding can be found in the following Fig. 9 The embodiments of the present invention are described.

[0179] It should be noted that the specific working process of each functional module in the base station described in the embodiment of the present invention can refer to the specific description of the corresponding process in the method embodiment, and the embodiment of the present invention will not be described in detail here.

[0180] The base station provided in the embodiment of the present invention generates the CAI field of the current scheduled carrier according to the scheduling conditions of all configured carriers configured by itself, and then carries the generated CAI field in the DCI and sends it to the UE through the current scheduled carrier. Because in the present invention, the CAI field sent by the base station to the UE for carrier scheduling indication indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field sent by the base station to the UE for carrier scheduling indication indicates the scheduling conditions of each configured carrier in all other configured carriers except the current scheduled carrier, and because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, therefore, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, thus reducing the field length of the DCI and thus reducing the signaling overhead.

[0181] Another embodiment of the present invention provides a UE, such as Figure 2 As shown, the UE may include: a receiving unit 21 and a processing unit 22.

[0182] The receiving unit 21 is configured to receive downlink control information DCI carrying a carrier allocation indication CAI field sent by a base station via at least one currently scheduled carrier.

[0183] Among them, the CAI field is used to indicate the total number of scheduled carriers among all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, where M means that from the first configured carrier to the current scheduled carrier, the current scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier.

[0184] The processing unit 22 is configured to obtain the CAI field in the DCI received by the receiving unit 21, so as to obtain the scheduling status of all configured carriers.

[0185] In an embodiment of the present invention, further, Figure 3 As shown, the UE may further include: a sending unit 23.

[0186] The sending unit 23 is configured to send hybrid automatic repeat request (HARQ) information to the base station after the processing unit 22 acquires the CAI field in the DCI.

[0187] The HARQ information is used to feedback whether the data sent by the base station through all scheduled carriers is correctly received, and the number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each scheduled carrier is correctly received.

[0188] In the embodiment of the present invention, further, when the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier,

[0189] In one possible implementation, the CAI field includes a first code and a second code, the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second code is a code obtained by the base station according to M and a preset second mapping relationship, and the second mapping relationship is used to indicate the second code corresponding to M.

[0190] In another possible implementation, the CAI field includes a first code and a third code, the third code is a code obtained by the base station according to the M and a preset third mapping relationship, and the third mapping relationship is used to indicate the third code corresponding to the M. The number of bits of the third code is less than the number of bits of the second code.

[0191] In the embodiment of the present invention, further, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier,

[0192] In one possible implementation, the CAI field includes a fourth code and a fifth code; the fourth code is a code obtained by the base station according to the number of the previous scheduled carrier and a preset fourth mapping relationship, and the fifth code is a code obtained by the base station according to the number of the subsequent scheduled carrier and the fourth mapping relationship, and the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier, and the fifth code corresponding to the number of the subsequent scheduled carrier.

[0193] In another possible implementation, the CAI field is a sixth code; the sixth code is a code obtained by the base station according to the number of the previous scheduled carrier, the number of the subsequent scheduled carrier and a preset fourth mapping relationship, and the fourth mapping relationship is used to indicate the sixth code corresponding to the joint encoding of the number of the previous scheduled carrier and the number of the subsequent scheduled carrier.

[0194] In the embodiment of the present invention, further, the processing unit 22 is also used to determine the total number of the scheduled carriers according to the CAI field, and determine the cumulative index value M of the at least one currently scheduled carrier.

[0195] The sending unit 23 is specifically configured to send HARQ information to the base station according to the total number of scheduled carriers determined by the processing unit 22 and the accumulated index value M of at least one currently scheduled carrier.

[0196] In an embodiment of the present invention, further, the processing unit 22 is also used to determine the number of the previous scheduled carrier and the number of the next scheduled carrier of the at least one currently scheduled carrier according to the CAI field, and determine the total number of scheduled carriers according to the number of the previous scheduled carrier and the number of the next scheduled carrier of the at least one currently scheduled carrier.

[0197] The sending unit 23 is specifically configured to send HARQ information to the base station according to the total number of scheduled carriers determined by the processing unit 22 and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0198] In the embodiment of the present invention, further, when the CAI field includes the first encoding and the second encoding,

[0199] The processing unit 22 is specifically configured to obtain, for the CAI field, the total number of scheduled carriers according to the first mapping relationship and the first coding, and obtain M according to the second mapping relationship and the second coding.

[0200] In the embodiment of the present invention, further, when the CAI field includes the first encoding and the third encoding,

[0201] The processing unit 22 is specifically configured to obtain, for the CAI field, the total number of scheduled carriers according to the first mapping relationship and the first coding, and obtain M according to the third mapping relationship and the third coding.

[0202] In the embodiment of the present invention, further, when the CAI field includes the fourth code and the fifth code,

[0203] The processing unit 22 is specifically configured to obtain, for the CAI field, the number of the previous scheduled carrier according to the fourth coding and the fourth mapping relationship, and obtain the number of the next scheduled carrier according to the fifth coding and the fourth mapping relationship.

[0204] In the embodiment of the present invention, further, when the CAI field is the sixth encoding,

[0205] The processing unit 22 is specifically configured to obtain, for the CAI field, the number of the previous scheduled carrier and the number of the next scheduled carrier according to the sixth encoding and the fourth mapping relationship.

[0206] It should be noted that the specific working process of each functional module in the UE described in the embodiment of the present invention can refer to the specific description of the corresponding process in the method embodiment, and the embodiment of the present invention will not be described in detail here.

[0207] The UE provided in the embodiment of the present invention receives a DCI carrying a CAI field sent by a base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI so as to learn the scheduling status of all configured carriers. Since in the present invention, the CAI field received by the UE indicates the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value of the currently scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field sent by the base station to the UE for carrier scheduling indication indicates the scheduling status of each configured carrier in all other configured carriers except the currently scheduled carrier, and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, thus reducing the field length of the DCI and thus reducing the signaling overhead.

[0208] Moreover, based on the scheduling carrier indication provided in the embodiment of the present invention, the UE can determine the number of bits of the HARQ information to be sent to the base station according to the total number of scheduled carriers of the base station. Since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art in which the UE determines the number of bits of the HARQ information to be sent to the base station according to the total number of all configured carriers, the number of bits of the HARQ information is reduced, thereby reducing the signaling overhead.

[0209] Another embodiment of the present invention provides a carrier scheduling indication method, such as Figure 4 As shown, the method may include:

[0210] S301. The base station generates a CAI field of a currently scheduled carrier according to the scheduling conditions of all configured carriers configured by itself.

[0211] In one possible implementation, the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the currently scheduled carrier, where M represents from the first configured carrier to the currently scheduled carrier, the currently scheduled carrier is the Mth scheduled carrier, and M is an integer greater than or equal to 1. Exemplarily, when the cumulative index value of the currently scheduled carrier is 5, it means that starting from the first configured carrier, the currently scheduled carrier is the fifth scheduled carrier.

[0212] In another possible implementation manner, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier.

[0213] S302: The base station carries the CAI field in the DCI and sends it to the UE via the currently scheduled carrier.

[0214] After the base station generates the CAI field of the currently scheduled carrier according to the scheduling conditions of all configured carriers configured by itself, the base station carries the generated CAI field in the DCI and sends it to the UE through the currently scheduled carrier.

[0215] The carrier scheduling indication method provided by the embodiment of the present invention, after the base station generates the CAI field of the current scheduled carrier according to the scheduling conditions of all configured carriers configured by itself, the generated CAI field is carried in the DCI and sent to the UE through the current scheduled carrier. Because in the present invention, the CAI field sent by the base station to the UE for carrier scheduling indication indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field sent by the base station to the UE for carrier scheduling indication indicates the scheduling conditions of each configured carrier in all other configured carriers except the current scheduled carrier, and because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, therefore, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, thus reducing the field length of the DCI, thereby reducing the signaling overhead.

[0216] Further, in S301, when the CAI field of the current scheduled carrier generated by the base station is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, in the first possible implementation method, the specific generation process of the CAI field is (that is, S301 can be specifically): the base station obtains the total number of scheduled carriers in all configured carriers, and obtains the cumulative index value M of the current scheduled carrier, obtains the first code according to the total number of scheduled carriers and the preset first mapping relationship, and obtains the second code according to the cumulative index M of the current scheduled carrier and the preset second mapping relationship, and then combines the first code and the second code to generate the CAI field. Among them, the first mapping relationship is used to indicate the first code corresponding to the total number of scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to the cumulative index M of the current scheduled carrier.

[0217] Exemplarily, the first code may be obtained by binary encoding the total number of scheduled carriers in all configured carriers. Similarly, the second code may be obtained by binary encoding the cumulative index value M of the current scheduled carrier.

[0218] The number of bits of the CAI field generated by the base station according to the combination of the first coding and the second coding is N is the total number of all configured carriers, In a possible implementation, the first code obtained by the base station is located at the front of the CAI field. bits, the second code obtained is located after the CAI field In another possible implementation, the first code obtained by the base station is located at the end of the CAI field. bits, the second code obtained is located at the front of the CAI field bits.

[0219] Further, in order to minimize the length of the CAI field when the number of configured carriers of the base station is large, in a second possible implementation, before the base station obtains the first code according to the total number of scheduled carriers and the preset first mapping relationship, and obtains the second code according to the cumulative index M of the currently scheduled carrier and the preset second mapping relationship, the base station may first determine Is it greater than 2? If the base station determines is not greater than 2, then after obtaining the total number of scheduled carriers in all configured carriers and obtaining the cumulative index value M of the currently scheduled carrier, the base station obtains the first code according to the total number of scheduled carriers and the preset first mapping relationship, and obtains the second code according to the cumulative index M of the currently scheduled carrier and the preset second mapping relationship, and then combines the first code with the second code to generate the CAI field; if the base station determines If the value is greater than 2, after obtaining the total number of scheduled carriers in all configured carriers and the cumulative index value M of the currently scheduled carrier, the base station obtains the first code according to the total number of scheduled carriers and the preset first mapping relationship, and obtains the third code according to the cumulative index M of the currently scheduled carrier and the preset third mapping relationship, and then combines the first code and the third code to generate the CAI field. The third mapping relationship is used to indicate the third code corresponding to the cumulative index M of the currently scheduled carrier, and the number of bits of the third code is less than the number of bits of the second code.

[0220] Optionally, the number of bits of the CAI field generated by the base station according to the combination of the first coding and the third coding is a is greater than or equal to 2 and less than Preferably, the number of bits in the CAI field can be In a possible implementation, the first code acquired by the base station is located at the front of the CAI field. bits, and the third code obtained is located in the last a bits of the CAI field. In another possible implementation, the first code obtained by the base station is located in the last a bits of the CAI field. bits, the third code obtained is located in the first a bits of the CAI field. The specific encoding method of the third code can be found in the following Figure 7 The embodiments of the present invention are described.

[0221] Further, when the CAI field of the current scheduled carrier generated by the base station is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, the specific generation process of the CAI field, that is, S301 can be specifically as follows: the base station obtains the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, and then generates the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the preset fourth mapping relationship.

[0222] Further, in the first possible implementation, the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier and the fifth code corresponding to the number of the next scheduled carrier. That is, the base station can independently encode the number of the previous scheduled carrier and the number of the next scheduled carrier to obtain the CAI field of the current scheduled carrier. In this way, the base station generates the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the preset fourth mapping relationship. The specific process can be: the base station obtains the fourth code according to the number of the previous scheduled carrier and the fourth mapping relationship, and obtains the fifth code according to the number of the next scheduled carrier and the fourth mapping relationship, and then combines the obtained fourth code and fifth code to generate the CAI field.

[0223] Exemplarily, the fourth code may be obtained by binary encoding the number of the previous scheduled carrier, and similarly, the fifth code may be obtained by binary encoding the number of the next scheduled carrier.

[0224] The number of bits in the CAI field can be In a possible implementation, the fourth code obtained by the base station is located at the front of the CAI field. bits, the fifth code is located after the CAI field In another possible implementation, the fourth code obtained by the base station is located at the end of the CAI field. bits, the fifth code is located at the front of the CAI field bits.

[0225] Furthermore, in order to reduce the length of the CAI field as much as possible when the number of configured carriers of the base station is large, in the second possible implementation, the fourth mapping relationship is used to indicate the sixth code corresponding to the number of the previous scheduled carrier and the number of the next scheduled carrier after joint coding; the number of bits of the sixth code is less than the sum of the number of bits of the fourth code and the fifth code. In other words, the base station can jointly encode the number of the previous scheduled carrier and the number of the next scheduled carrier to obtain the CAI field of the current scheduled carrier. In this way, the specific process of the base station generating the CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the preset fourth mapping relationship can be: the base station obtains the sixth code according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the fourth mapping relationship, and uses the sixth code as the CAI field.

[0226] At this time, the number of bits of the CAI field can be The specific encoding method of the sixth encoding can be found in the following Fig. 9 The embodiments of the present invention are described.

[0227] Another embodiment of the present invention provides a carrier scheduling indication method, such as Figure 5 As shown, the method may include:

[0228] S401. A UE receives a DCI carrying a CAI field sent by a base station through at least one currently scheduled carrier.

[0229] Among them, in one possible implementation, the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier, where M represents from the first configured carrier to the currently scheduled carrier, the currently scheduled carrier is the Mth scheduled carrier, and M is an integer greater than or equal to 1. In another possible implementation, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier.

[0230] S402: The UE obtains the CAI field in the DCI to obtain the scheduling status of all configured carriers.

[0231] After the UE receives the DCI carrying the CAI field sent by the base station through at least one currently scheduled carrier, the CAI field in all received DCIs can be acquired so as to acquire the scheduling status of all configured carriers configured by the base station.

[0232] In the carrier scheduling indication method provided by the embodiment of the present invention, the UE receives the DCI carrying the CAI field sent by the base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI, so as to know the scheduling status of all configured carriers. Since in the present invention, the CAI field received by the UE indicates the total number of scheduled carriers and the cumulative index value of the current scheduled carrier in all configured carriers configured by the base station, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field sent by the base station to the UE for carrier scheduling indication indicates the scheduling status of each configured carrier in all other configured carriers except the current scheduled carrier, and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, so that the field length of the DCI is reduced, thereby reducing the signaling overhead.

[0233] After the UE obtains the CAI field in the DCI and learns the scheduling status of all configured carriers, the UE can receive data according to the CAI field in the DCI. In order to ensure the reliability of data transmission, the UE can send HARQ information to the base station to feedback whether it correctly receives the data sent by the base station through all scheduled carriers. Therefore, further, after executing S402, that is, after the UE obtains the CAI field in the DCI, the UE can send HARQ information to the base station.

[0234] The HARQ information is used to feedback whether the data sent by the base station through all scheduled carriers is correctly received. The number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each scheduled carrier is correctly received.

[0235] Further, when the CAI field carried in the DCI received by the UE in S401 is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier, in a first possible implementation method, the CAI field carried in the DCI received by the UE includes a first code and a second code.

[0236] Among them, the first code is the code obtained by the base station according to the total number of scheduled carriers and the preset first mapping relationship, the first mapping relationship is used to indicate the first code corresponding to the total number of scheduled carriers, and the second code is the code obtained by the base station according to M and the preset second mapping relationship, and the second mapping relationship is used to indicate the second code corresponding to M.

[0237] Exemplarily, the first code may be obtained by binary encoding the total number of scheduled carriers in all configured carriers. Similarly, the second code may be obtained by binary encoding the cumulative index value M of the current scheduled carrier.

[0238] In a second possible implementation manner, the CAI field carried in the DCI received by the UE includes the first coding and the third coding.

[0239] Among them, the first code is the code obtained by the base station according to the total number of scheduled carriers and the preset first mapping relationship, the first mapping relationship is used to indicate the first code corresponding to the total number of scheduled carriers, and the third code is the code obtained by the base station according to M and the preset third mapping relationship, the third mapping relationship is used to indicate the third code corresponding to M, wherein the number of bits of the third code is less than the number of bits of the second code.

[0240] Further, when the CAI field carried in the DCI received by the UE in S401 is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, in a first possible implementation method, the CAI field carried in the DCI received by the UE includes a fourth code and a fifth code.

[0241] Among them, the fourth code is the code obtained by the base station according to the number of the previous scheduled carrier and the preset fourth mapping relationship, and the fifth code is the code obtained by the base station according to the number of the next scheduled carrier and the fourth mapping relationship. The fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier and the fifth code corresponding to the number of the next scheduled carrier.

[0242] Exemplarily, the fourth code may be obtained by binary encoding the number of the previous scheduled carrier, and similarly, the fifth code may be obtained by binary encoding the number of the next scheduled carrier.

[0243] In a second possible implementation manner, the CAI field carried in the DCI received by the UE is the sixth encoding.

[0244] Among them, the sixth code is the code obtained by the base station according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the preset fourth mapping relationship, and the fourth mapping relationship is used to indicate the sixth code corresponding to the joint encoding of the number of the previous scheduled carrier and the number of the next scheduled carrier.

[0245] At this time, the number of bits of the CAI field can be The specific encoding method of the sixth encoding can be found in the following Fig. 9 The embodiments of the present invention are described.

[0246] Furthermore, in a possible implementation, when the CAI field carried in the DCI received by the UE in S401 is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier, the UE sends HARQ information to the base station. Specifically, the UE determines the total number of scheduled carriers and the cumulative index value M of at least one currently scheduled carrier based on the CAI field, and then sends HARQ information to the base station based on the total number of scheduled carriers and the cumulative index value M of at least one currently scheduled carrier.

[0247] Among them, when the CAI field includes a first code and a second code, the UE determines the total number of scheduled carriers according to the CAI field, and determines the cumulative index value M of at least one currently scheduled carrier. Specifically, it can be: for each CAI field, the UE obtains the total number of scheduled carriers according to the first mapping relationship and the first code, and obtains M according to the second mapping relationship and the second code; when the CAI field includes a first code and a third code, the UE determines the total number of scheduled carriers according to the CAI field, and determines the cumulative index value M of at least one currently scheduled carrier. Specifically, it can be: for each CAI field, according to the first mapping relationship and the first code, obtain the total number of scheduled carriers, and obtain M according to the third mapping relationship and the third code.

[0248] In another possible implementation, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, the UE sends HARQ information to the base station. Specifically, the UE determines the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier according to the CAI field, and determines the total number of scheduled carriers according to the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier, and then sends HARQ information to the base station according to the total number of scheduled carriers and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0249] Among them, when the CAI field includes the fourth code and the fifth code, the UE determines the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier according to the CAI field. Specifically, it can be: for each CAI field, the UE obtains the number of the previous scheduled carrier according to the fourth code and the fourth mapping relationship, and obtains the number of the next scheduled carrier according to the fifth code and the fourth mapping relationship; when the CAI field is the sixth code, the UE determines the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier according to the CAI field. Specifically, it can be: for each CAI field, the UE obtains the number of the previous scheduled carrier and the number of the next scheduled carrier according to the sixth code and the fourth mapping relationship.

[0250] Optionally, the number of bits of the HARQ information in the present invention is equal to the sum of the number of bits required to feedback whether the data sent on each scheduled carrier is correctly received, that is, the number of bits of the HARQ information in the present invention is determined based on the total number of scheduled carriers, while the number of bits of the HARQ information sent by the UE to the base station in the prior art is determined based on the total number of configured carriers. Since the total number of scheduled carriers of the base station is less than or equal to the total number of scheduled carriers of the base station, based on the scheduled carrier indication provided in an embodiment of the present invention, the UE can determine the number of bits of the HARQ information sent to the base station according to the total number of scheduled carriers of the base station, which is less than the number of bits of the HARQ information sent to the base station determined according to the total number of configured carriers of the base station in the prior art. In this way, the feedback overhead of the UE is reduced.

[0251] Another embodiment of the present invention provides a carrier scheduling indication method. In order to enable the UE to be informed of the carrier scheduling performed by the base station, the base station may carry a CAI field in the DCI sent to the UE, so that the UE can be informed of the carrier scheduling performed by the base station according to the CAI field carried in all received DCI. To facilitate the understanding of those skilled in the art, in the embodiments of the present invention, in addition to the fourth implementation, the total number of all configured carriers of the base station is equal to 16, and the carriers scheduled by the base station are CC0, CC2 and CC5 as an example, and in combination with different implementations, the specific implementation process of the present invention is described in detail, as follows:

[0252] In a first embodiment, if Figure 6 As shown, the method may include:

[0253] S501. The base station obtains the total number of scheduled carriers in all configured carriers, and obtains the cumulative index value M of the currently scheduled carrier.

[0254] Among them, M represents from the first configured carrier to the currently scheduled carrier, and the currently scheduled carrier is the Mth scheduled carrier. Exemplarily, the carriers scheduled by the base station are CC0, CC2 and CC5. Therefore, the total number of scheduled carriers acquired by the base station is 3, the cumulative index value of the currently scheduled carrier CC0 is 1, the cumulative index value of the currently scheduled carrier CC2 is 2, and the cumulative index value of the currently scheduled carrier CC5 is 3.

[0255] S502: The base station obtains a first code according to the total number of scheduled carriers and a preset first mapping relationship, and obtains a second code according to a cumulative index value M of the current scheduled carrier and a preset second mapping relationship.

[0256] The first mapping relationship is used to indicate the first coding corresponding to the total number of scheduled carriers, and the second mapping relationship is used to indicate the second coding corresponding to M.

[0257] Exemplarily, when the number of configured carriers of the base station is equal to 16, the preset first mapping relationship in the base station can be as shown in Table 1, and the preset second mapping relationship can be as shown in Table 2. For CC0, the base station queries Table 1 according to the total number of scheduled carriers obtained (the total number of scheduled carriers is equal to 3), obtains the first code as 0010, and queries Table 2 according to the cumulative index value of the current scheduled carrier CC0 obtained (the cumulative index value of CC0 is equal to 1), and obtains the second code as 0000; for CC2, the first code obtained by the base station is 0010, and according to the cumulative index value of the current scheduled carrier CC2 obtained (the cumulative index value of CC2 is equal to 2), queries Table 2, and obtains the second code as 0001; for CC5, the first code obtained by the base station is 0010, and according to the cumulative index value of the current scheduled carrier CC5 obtained (the cumulative index value of CC5 is equal to 3), queries Table 2, and obtains the second code as 0010.

[0258] It should be noted that, in the embodiment of the present invention, for each currently scheduled carrier, the base station may only obtain the first code once, and then obtain the second code of each currently scheduled carrier respectively.

[0259] Table 1

[0260]

[0261]

[0262] Table 2

[0263]

[0264]

[0265] It should be noted that the numerical values ​​contained in Table 1 and Table 2 of the embodiment of the present invention are only examples. The embodiment of the present invention does not restrict the specific value of the first code corresponding to the total number of scheduled carriers in Table 1, that is, the encoding method, and the specific value of the second code corresponding to the cumulative index value of the current scheduled carrier in Table 2, that is, the encoding method. The specific values ​​of the first code corresponding to the total number of scheduled carriers and the second code corresponding to the cumulative index value of the current scheduled carrier can be set accordingly according to the needs of the actual scenario.

[0266] S503: The base station combines the first code and the second code to generate a CAI field.

[0267] The CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value of the currently scheduled carrier. According to the example in S502, since the total number of all configured carriers of the base station is equal to 16, the number of bits of the CAI field can be In this way, the number of bits of the CAI field generated by the base station is 8. In addition, in the generated CAI field, in a first possible implementation, the first coding is located in the first 4 bits of the CAI field, and the second coding is located in the last 4 bits of the CAI field, and in a second possible implementation, the first coding is located in the last 4 bits of the CAI field, and the second coding is located in the first 4 bits of the CAI field.

[0268] Exemplarily, for CC0, the CAI field of CC0 generated by the base station according to the first possible implementation method is 00100000, and the CAI field of CC0 generated by the base station according to the second possible implementation method is 00000010; for CC2, the CAI field of CC2 generated by the base station according to the first possible implementation method is 00100001, and the CAI field of CC2 generated by the base station according to the second possible implementation method is 00010010; for CC5, the CAI field of CC5 generated by the base station according to the first possible implementation method is 00100010, and the CAI field of CC5 generated by the base station according to the second possible implementation method is 00100010.

[0269] S504: The base station carries the CAI field in the DCI and sends it to the UE via the currently scheduled carrier.

[0270] Among them, the base station can carry the generated CAI field of CC0 in DCI and send it to the UE through CC0, can carry the generated CAI field of CC2 in DCI and send it to the UE through CC2, and can carry the generated CAI field of CC5 in DCI and send it to the UE through CC5.

[0271] S505. The UE receives a DCI carrying a CAI field sent by the base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI, so as to learn the scheduling status of all configured carriers.

[0272] Among them, the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier, including the first coding and the second coding. According to an example of an embodiment of the present invention, in one possible implementation, the first 4 bits of the CAI field are the first coding, and the last 4 bits are the second coding. In another possible implementation, the first 4 bits of the CAI field are the second coding, and the last 4 bits are the first coding.

[0273] When the UE receives the DCI sent by the base station through the CC0, CC2 and CC5, and obtains the CAI field in each DCI, it can learn the scheduling of all configured carriers in combination with the information in each CAI field. After that, the UE can receive data according to the DCI. Optionally, in order to ensure the reliability of data transmission, the UE can send HARQ information to the base station to feedback whether it correctly receives the data sent by the base station through all scheduled carriers. Therefore, after S505, the method can also include S506-S507.

[0274] S506. The UE determines the total number of scheduled carriers according to the CAI field, and determines a cumulative index value M of at least one currently scheduled carrier.

[0275] Specifically, S506 may be: for each obtained CAI field, the UE obtains the total number of scheduled carriers according to the first mapping relationship and the first coding, and obtains M according to the second mapping relationship and the second coding.

[0276] Exemplarily, when the first mapping relationship preset in the base station is as shown in Table 1, the first mapping relationship preset in the UE is also as shown in Table 1; when the second mapping relationship preset in the base station is as shown in Table 2, the second mapping relationship preset in the UE is also as shown in Table 2. When the first 4 bits of the CAI field are the first code and the last 4 bits are the second code, if the UE receives DCI through CC0 and the CAI field carried in the DCI is 00100000, the UE queries Table 1 according to the first code 0010 to obtain the total number of scheduled carriers as 3, and queries Table 2 according to the second code 0000 to obtain the cumulative index value of the current scheduled carrier CC0 as 1. Similarly, if the UE receives DCI through CC2 and the CAI field carried in the DCI is 00100001, the UE can obtain the total number of scheduled carriers as 3 and the cumulative index value of the current scheduled carrier CC5 as 2; if the UE receives DCI through CC5 and the CAI field carried in the DCI is 00100010, the UE can obtain the total number of scheduled carriers as 3 and the cumulative index value of the current scheduled carrier CC5 as 3.

[0277] S507: The UE sends HARQ information to the base station according to the total number of scheduled carriers and the cumulative index value M of at least one currently scheduled carrier.

[0278] The number of bits of the HARQ information may be equal to the sum of the number of bits required to provide feedback on whether the data sent on each of the scheduled carriers is correctly received.

[0279] After knowing the total number of scheduled carriers and the cumulative index value M of at least one currently scheduled carrier, the UE can combine this information in each CAI field to learn the scheduling status of all configured carriers. Then, combined with the actual data reception status sent on each of the scheduled carriers, the UE can send HARQ information to the base station.

[0280] It should be noted that, in the embodiment of the present invention, the UE can send HARQ information to the base station through the main carrier, and can also send HARQ information to the base station through the main carrier and an auxiliary carrier. The embodiment of the present invention does not make any specific restrictions on the carrier used to send the HARQ information. The specific carrier used to send the HARQ information can be selected according to the requirements of the actual application scenario.

[0281] Exemplarily, when the number of bits required for feedback on whether the data sent on each scheduled carrier is correctly received is 1, taking "1" indicating that the UE correctly receives the data and "0" indicating that the UE does not correctly receive the data as an example, when the UE receives DCI through CC0 and CC5 respectively, the UE can know that the base station transmits data through CC0 and CC5 respectively, and can know that the total number of scheduled carriers of the base station is equal to 3, the cumulative index value of CC0 is 1, and the cumulative index value of CC5 is 3. If the UE only correctly receives the data sent by the base station through CC0, the HARQ information sent by the UE to the base station is 100, to indicate that it has correctly received the data sent by the base station through the current scheduled carrier with a cumulative index value of 1, and has not correctly received the data sent by the base station through the scheduled carriers with cumulative index values ​​of 2 and cumulative index values ​​of 3. After the base station receives the HARQ information sent by the UE, the base station can resend at least one of the DCI and data to the UE through the scheduled carriers with cumulative index values ​​of 2 and cumulative index values ​​of 3.

[0282] From the above, it can be seen that when the number of bits required for feedback on whether the data sent on each scheduled carrier is correctly received is 1, the number of bits of the HARQ information is equal to the total number of scheduled carriers of the base station, and the number of bits of the HARQ information sent by the UE to the base station in the prior art is equal to the total number of configured carriers of the base station. Since the total number of scheduled carriers of the base station is less than or equal to the total number of scheduled carriers of the base station, based on the scheduled carrier indication provided in an embodiment of the present invention, the UE can determine the number of bits of the HARQ information sent to the base station according to the total number of scheduled carriers of the base station, which is less than the number of bits of the HARQ information sent to the base station determined according to the total number of configured carriers of the base station in the prior art. In this way, the feedback overhead of the UE is reduced.

[0283] Furthermore, when the time division duplex (TDD) mode is used for data transmission between the base station and the UE, the UE can only use the physical uplink control channel format 3 (PUCCH format 3) to send HARQ information to the base station, but the maximum number of feedback bits supported by PUCCH format 3 is 20. In this way, when the total number of carriers configured by the base station is large (that is, the total number of configured carriers is large), if the HARQ information sent to the base station is determined according to the total number of configured carriers of the base station in the prior art, then the number of bits of the fedback HARQ information will be greater than 20, resulting in failure to send the HARQ information. However, if the UE sends the HARQ information to the base station according to the carrier scheduling indication method provided by the present invention, the probability that the UE determines that the number of bits of the HARQ information sent to the base station is greater than 20 according to the total number of scheduled carriers of the base station will be greatly reduced. Therefore, the UE can use PUCCH format 3 to send HARQ information to the base station.

[0284] In a second embodiment, if Figure 7 As shown, the method may include:

[0285] S601. The base station obtains the total number of scheduled carriers in all configured carriers, and obtains the cumulative index value M of the currently scheduled carrier.

[0286] S602, base station determination Is it greater than 2?

[0287] Among them, after the base station obtains the total number of scheduled carriers and the cumulative index value M of the currently scheduled carrier, in order to reduce the number of bits of the CAI field as much as possible when the total number of configured carriers of the base station is large, the base station can first determine Is it greater than 2? If it is not greater than 2, execute S603-S604. When it is greater than 2, execute S605-S606. Assume that the total number N of configured carriers of the base station is equal to 16. Based on this, the base station can determine Greater than 2, that is, after executing S602, the base station continues to execute S605-S606.

[0288] S603: The base station obtains a first code according to the total number of scheduled carriers and a preset first mapping relationship, and obtains a second code according to the cumulative index value M of the current scheduled carrier and a preset second mapping relationship.

[0289] The first mapping relationship is used to indicate the first coding corresponding to the total number of scheduled carriers, and the second mapping relationship is used to indicate the second coding corresponding to M.

[0290] The number of bits of the first encoding and the second encoding can be

[0291] S604: The base station combines the first code and the second code to generate a CAI field.

[0292] S605: The base station obtains a first code according to the total number of scheduled carriers and a preset first mapping relationship, and obtains a third code according to a cumulative index value M of the currently scheduled carrier and a preset third mapping relationship.

[0293] The third mapping relationship is used to indicate the third code corresponding to the cumulative index value M of the currently scheduled carrier, and the number of bits of the third code is less than the number of bits of the second code. In the third mapping relationship, since multiple different M can correspond to the same third code, the number of bits of the third code can be less than the number of bits of the second code, that is, the number of bits of the third code is less than

[0294] Exemplarily, when the number of configured carriers of the base station is equal to 16, in order to reduce the number of bits of the CAI field as much as possible when the total number of configured carriers of the base station is large, the number of bits of the third encoding may be less than That is to say, the number of bits of the third code can be 2 or 3. Taking the number of bits of the third code as 2 as an example, the third mapping relationship preset in the base station can be shown in Table 3. It can be seen from Table 3 that when M is equal to 1, 5, 9, and 13, respectively, the corresponding third codes are all 00, that is, the number of bits of the third code is 2. For CC0, the base station queries Table 1 according to the total number of scheduled carriers obtained (for example, the total number of scheduled carriers is equal to 3), obtains the first code as 0010, and obtains the cumulative index value of the current scheduled carrier CC0 obtained (the The cumulative index value of CC0 is equal to 1), query Table 3, and obtain the third code as 00; for CC2, the first code obtained by the base station is 0010, and according to the cumulative index value of the currently scheduled carrier CC2 obtained (the cumulative index value of CC2 is equal to 2), query Table 3, and obtain the third code as 01; for CC5, the first code obtained by the base station is 0010, and according to the cumulative index value of the currently scheduled carrier CC5 obtained (the cumulative index value of CC5 is equal to 3), query Table 3, and obtain the third code as 10.

[0295] It should be noted that, in the embodiment of the present invention, for each currently scheduled carrier, the base station may only obtain the first code once, and then obtain the second code of each currently scheduled carrier respectively.

[0296] Table 3

[0297] The cumulative index value of the currently scheduled carrier The third code 1 or 5 or 9 or 13 00 2 or 6 or 10 or 14 01 3 or 7 or 11 or 15 10 4 or 8 or 12 or 16 11

[0298] It should be noted that the numerical values ​​contained in Table 3 of the embodiment of the present invention are only examples. The embodiment of the present invention does not limit the specific value of the third code corresponding to the cumulative index value of the currently scheduled carrier in Table 3. The specific value of the second code corresponding to the cumulative index value of the currently scheduled carrier can be set accordingly according to the needs of the actual scenario.

[0299] S606: The base station combines the first code and the third code to generate a CAI field.

[0300] The CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value of the currently scheduled carrier. According to an example of an embodiment of the present invention, since the total number of all configured carriers of the base station is equal to 16, the number of bits of the CAI field is (here a=2) It can be concluded that the number of bits of the CAI field generated by the base station is 6. Moreover, in the generated CAI field, in a first possible implementation, the first coding is located in the first 4 bits of the CAI field, and the third coding is located in the last 2 bits of the CAI field, and in a second possible implementation, the first coding is located in the last 4 bits of the CAI field, and the third coding is located in the first 2 bits of the CAI field.

[0301] Exemplarily, for CC0, the CAI field of CC0 generated by the base station according to the first possible implementation method is 001000, and the CAI field of CC0 generated by the base station according to the second possible implementation method is 000010; for CC2, the CAI field of CC2 generated by the base station according to the first possible implementation method is 001001, and the CAI field of CC2 generated by the base station according to the second possible implementation method is 010010; for CC5, the CAI field of CC5 generated by the base station according to the first possible implementation method is 001010, and the CAI field of CC5 generated by the base station according to the second possible implementation method is 100010.

[0302] S607: The base station carries the CAI field in the DCI and sends it to the UE via the currently scheduled carrier.

[0303] Among them, the description of S601-S604 and S607 can refer to the description of S501-S504, and will not be repeated here.

[0304] It can be seen from the description of S502-S503 in the previous embodiment of the present invention and S605-S606 in the embodiment of the present invention that when When is greater than 2, the third code obtained by the base station according to the third mapping relationship has fewer bits than the second code obtained by the base station according to the second mapping relationship. In this way, the number of bits of the CAI field generated by the base station according to the combination of the first code and the third code is less than the number of bits of the CAI field generated by the base station according to the combination of the first code and the second code. That is, when When it is greater than 2, preferably, the base station generates the CAI field according to the combination of the first coding and the third coding, so that the field length of the DCI can be further reduced, thereby reducing the signaling overhead.

[0305] S608. The UE receives a DCI carrying a CAI field sent by the base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI, so as to learn the scheduling status of all configured carriers.

[0306] The CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier, and may include the first code and the second code, or the first code and the third code.

[0307] When the CAI field includes the first encoding and the second encoding, according to the examples in S605-S606, in one possible implementation, the first 4 bits of the CAI field are the first encoding, and the last 2 bits are the second encoding. In another possible implementation, the first 2 bits of the CAI field are the second encoding, and the last 4 bits are the first encoding.

[0308] When the CAI field includes the first encoding and the third encoding, according to an example of an embodiment of the present invention, in one possible implementation, the first 4 bits of the CAI field are the first encoding, and the last 2 bits are the third encoding. In another possible implementation, the first 2 bits of the CAI field are the third encoding, and the last 4 bits are the first encoding.

[0309] After the UE receives the DCI sent by the base station and obtains the CAI field in the DCI and learns the scheduling status of all configured carriers, the UE can receive data according to the DCI. Optionally, in order to ensure the reliability of data transmission, the UE can send HARQ information to the base station to provide feedback on whether it has correctly received the data sent by the base station through all scheduled carriers. Therefore, after S608, the method also includes S609-S610.

[0310] S609. The UE determines the total number of scheduled carriers according to the CAI field, and determines a cumulative index value M of at least one currently scheduled carrier.

[0311] When the CAI field includes the first code and the third code, S609 may specifically be: for each CAI field, obtaining the total number of scheduled carriers according to the first mapping relationship and the first code, and obtaining M according to the third mapping relationship and the third code.

[0312] Exemplarily, when the first mapping relationship preset in the base station is as shown in Table 1, the first mapping relationship preset in the UE is also as described in Table 1, and when the third mapping relationship preset in the base station is as shown in Table 3, the third mapping relationship preset in the UE is also as shown in Table 3. When the first 4 bits of the CAI field are the first code and the last 2 bits are the third code, if the UE receives the DCI through CC0, and the CAI field carried in the DCI is 001000, the UE queries Table 1 according to the first code 0010, and obtains that the total number of scheduled carriers is 3, and queries Table 2 according to the third code 00, and obtains that the cumulative index values ​​corresponding to the third code 00 are 1, 5, 9 and 13. Since the DCI carrying the CAI field is received by the UE through the current scheduled carrier CC0, the UE can obtain the cumulative index value of the current scheduled carrier CC0 as 1. Similarly, if the UE receives DCI through CC2 and the CAI field carried in the DCI is 001001, the UE can obtain the total number of scheduled carriers as 3, and can obtain the cumulative index value of the current scheduled carrier CC2 as 2; if the UE receives DCI through CC5 and the CAI field carried in the DCI is 001010, the UE can obtain the total number of scheduled carriers as 3, and can obtain the cumulative index value of the current scheduled carrier CC5 as 3.

[0313] It should be noted that when the CAI field includes a first code and a second code, the UE determines the total number of scheduled carriers based on the CAI field, and the process of determining the cumulative index value M of at least one currently scheduled carrier can refer to the specific description of S506 in the above embodiment, and the embodiments of the present invention will not be repeated here.

[0314] S610. The UE sends HARQ information to the base station according to the total number of scheduled carriers and a cumulative index value M of at least one currently scheduled carrier.

[0315] The number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each of the scheduled carriers is correctly received. The description of S610 can refer to the description of S507, which will not be repeated here.

[0316] It should be noted that the specific description of S601-S610 in the embodiment of the present invention can refer to the description in S501-S507, and the embodiment of the present invention will not be repeated here.

[0317] In a third embodiment, if Figure 8 As shown, the method may include:

[0318] S701. A base station obtains a number of a previous scheduled carrier and a number of a next scheduled carrier of a currently scheduled carrier.

[0319] For example, the carriers scheduled by the base station are CC0, CC2 and CC5. Therefore, for CC0, the previous scheduled carrier is numbered 5, and the next scheduled carrier is numbered 2; for CC2, the previous scheduled carrier is numbered 0, and the next scheduled carrier is numbered 5; for CC5, the previous scheduled carrier is numbered 2, and the next scheduled carrier is numbered 0.

[0320] Exemplarily, when only one carrier among the configured carriers of the base station is scheduled, for example, the total number of configured carriers of the base station is 16, and the scheduled carrier is CC5, then for CC5, the previous scheduled carrier is numbered 5, and the next scheduled carrier is also numbered 5.

[0321] When two carriers are scheduled among the configured carriers of the base station, for example, the total number of configured carriers of the base station is 16, and the scheduled carriers are CC5 and CC8, then, for CC5, the number of the previous scheduled carrier is 8, and the number of the next scheduled carrier is also 8. For CC8, the number of the previous scheduled carrier is 5, and the number of the next scheduled carrier is also 5.

[0322] S702: The base station obtains a fourth code according to the number of the previous scheduled carrier and the fourth mapping relationship, and obtains a fifth code according to the number of the next scheduled carrier and the fourth mapping relationship.

[0323] The fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier and the fifth code corresponding to the number of the next scheduled carrier.

[0324] Exemplarily, the preset fourth mapping relationship can be as shown in Table 4. After the base station obtains the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, it can query Table 4 according to the number of the previous scheduled carrier to obtain the fourth code, and query Table 4 according to the number of the next scheduled carrier to obtain the fifth code.

[0325] Table 4

[0326] Number of the scheduled carrier The fourth code 1 0000 2 0001 3 0010 4 0011 5 0100 6 0101 7 0110 8 0111 9 1000 10 1001 11 1010 12 1011 13 1100 14 1101 15 1110 16 1111

[0327] It should be noted that the numerical values ​​contained in Table 4 of the embodiment of the present invention are only examples. The embodiment of the present invention does not limit the specific values ​​of the codes corresponding to the numbers of the scheduled carriers in Table 4. The specific values ​​of the codes corresponding to the numbers of the scheduled carriers can be set accordingly according to the needs of the actual scenario.

[0328] Of course, the fourth code can be obtained by binary encoding the number of the previous scheduled carrier, and the fifth code can be obtained by binary encoding the number of the next scheduled carrier, so that after the base station obtains the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, the number of the previous scheduled carrier can be directly binary encoded to obtain the fourth code, and the number of the next scheduled carrier can be binary encoded to obtain the fifth code. Exemplarily, when the number of carriers configured by the base station is equal to 16, the number of coding bits of the previous scheduled carrier and the number of coding bits of the next scheduled carrier are 4. For example, for the current scheduled carrier CC0, the base station obtains the binary code of the previous scheduled carrier number 5 of CC0 as 0101, and the binary code of the next scheduled carrier number 2 as 0010; for the current scheduled carrier CC2, the base station obtains the binary code of the previous scheduled carrier number 0 of CC2 as 0000, and the binary code of the next scheduled carrier number 5 is 0101; for the current scheduled carrier CC5, the base station obtains the binary code of the previous scheduled carrier number 2 of CC5 as 0010, and the binary code of the next scheduled carrier number 0 is 0000.

[0329] S703: The base station combines the fourth code and the fifth code to generate a CAI field.

[0330] The CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier. According to an example of an embodiment of the present invention, the total number of all configured carriers of the base station is equal to 16, and the number of bits of the CAI field can be In this way, the number of bits of the CAI field generated by the base station is 8. In addition, in the generated CAI field, in a first possible implementation, the fourth code is located in the first 4 bits of the CAI field, and the fifth code is located in the last 4 bits of the CAI field, and in a second possible implementation, the fifth code is located in the first 4 bits of the CAI field, and the fourth code is located in the last 4 bits of the CAI field.

[0331] Exemplarily, the CAI field corresponding to each currently scheduled carrier generated by the base station according to the first possible implementation method may be as shown in Table 5, and the CAI field corresponding to each currently scheduled carrier generated by the base station according to the second possible implementation method may be as shown in Table 6.

[0332] Table 5

[0333]

[0334] Table 6

[0335]

[0336] S704: The base station carries the CAI field in the DCI and sends it to the UE via the currently scheduled carrier.

[0337] S705. The UE receives a DCI carrying a CAI field sent by the base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI, so as to learn the scheduling status of all configured carriers.

[0338] The CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, including the fourth code and the fifth code. According to an example of an embodiment of the present invention, in one possible implementation, the first 4 bits of the CAI field are the fourth code, and the last 4 bits of the CAI field are the fifth code. In another possible implementation, the first 4 bits of the CAI field are the fifth code, and the last 4 bits of the CAI field are the fourth code.

[0339] After the UE receives the DCI sent by the base station, the UE can receive data according to the DCI. Optionally, in order to ensure the reliability of data transmission, the UE can send HARQ information to the base station to feedback whether it has correctly received the data sent by the base station through all scheduled carriers. Therefore, after S705, the method also includes S706-S708.

[0340] S706. The UE determines, according to the CAI field, a number of a previous scheduled carrier and a number of a next scheduled carrier of at least one currently scheduled carrier.

[0341] Specifically, S706 may be: for each CAI field, the UE obtains the number of the previous scheduled carrier according to the fourth coding and the fourth mapping relationship, and obtains the number of the next scheduled carrier according to the fifth coding and the fourth mapping relationship.

[0342] Exemplarily, when the fourth mapping relationship preset in the base station is as shown in Table 4, the fourth mapping relationship preset in the UE is also as shown in Table 4, when the first 4 bits of the CAI field are the fourth code and the last 4 bits are the fifth code, if the UE receives DCI through CC0, and the CAI field carried in the DCI is 01010010, then the UE can obtain the number of the previous scheduled carrier of the current scheduled carrier CC0 as 5 according to the fourth code, that is, the code of the first 4 bits of the CAI field is 0101, and according to the fifth code, that is, the code of the last 4 bits of the CAI field is 0010, the number of the next scheduled carrier of the current scheduled carrier CC0 can be obtained as 2. Similarly, if the UE receives DCI through CC2 and the CAI field carried in the DCI is 000001 01, then the UE can obtain the number of the previous scheduled carrier CC2 as 0 according to the fourth coding, that is, the coding of the first 4 bits of the CAI field as 0000, and can obtain the number of the next scheduled carrier CC2 as 5 according to the fifth coding, that is, the coding of the last 4 bits of the CAI field as 0101; if the UE receives DCI through CC5, and the CAI field carried in the DCI is 00100000, then the UE can obtain the number of the previous scheduled carrier CC5 as 2 according to the fourth coding, that is, the coding of the first 4 bits of the CAI field as 0010, and can obtain the number of the next scheduled carrier CC5 as 0 according to the fifth coding, that is, the coding of the last 4 bits of the CAI field as 0000.

[0343] S707: The UE determines the total number of scheduled carriers according to the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0344] Among them, after the UE determines the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier according to the CAI field, the UE can determine the total number of scheduled carriers according to the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0345] For example, since the UE obtains that the previous scheduled carrier of CC0 is numbered 5 and the next scheduled carrier is numbered 2, the previous scheduled carrier of CC2 is numbered 0 and the next scheduled carrier is numbered 5, the previous scheduled carrier of CC5 is numbered 2 and the next scheduled carrier is numbered 0, the UE can determine that the scheduled carriers of the base station are CC0, CC2 and CC5 respectively, that is, the UE can determine that the total number of scheduled carriers of the base station is 3.

[0346] S708. The UE sends HARQ information to the base station according to the total number of scheduled carriers and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0347] The number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each of the scheduled carriers is correctly received. After the UE obtains the total number of scheduled carriers and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier, the UE can send HARQ information to the base station based on the total number of scheduled carriers and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier, so as to feedback whether it correctly receives the data sent by the base station through all scheduled carriers.

[0348] It should be noted that, in the embodiment of the present invention, the UE can send HARQ information to the base station through the main carrier, and can also send HARQ information to the base station through the main carrier and an auxiliary carrier. The embodiment of the present invention does not make any specific restrictions on the carrier used to send the HARQ information. The specific carrier used to send the HARQ information can be selected according to the requirements of the actual application scenario.

[0349] Exemplarily, when the number of bits required for feedback on whether the data sent on each scheduled carrier is correctly received is 1, taking "1" indicating that the UE correctly receives the data and "0" indicating that the UE does not correctly receive the data as an example, when the UE receives DCI through CC0 and CC5 respectively, the UE can know that the base station transmits data through CC0 and CC5 respectively, and can know that the scheduled carriers of the base station are CC0, CC2 and CC5 respectively, that is, the UE can know that the total number of scheduled carriers of the base station is 3, so that the UE can determine that the number of bits of the HARQ information sent to the base station is 3. If the UE only correctly receives the data sent by the base station through CC0, the HARQ information sent by the UE to the base station is 100, to indicate that it has correctly received the data sent by the base station through the current scheduled carrier CC0, and has not correctly received the data sent by the base station through the current scheduled carrier CC2 and the current scheduled carrier CC5. After the base station receives the HARQ information sent by the UE, the base station resends the data sent through the current scheduled carrier CC2 and the current scheduled carrier CC5 to the UE.

[0350] It should be noted that the specific description of S701-S708 in the embodiment of the present invention can refer to the description in S501-S507, and the embodiment of the present invention will not be repeated here.

[0351] In the fourth implementation mode, in order to facilitate the understanding of those skilled in the art, the carrier scheduling indication method provided in the embodiment of the present invention is introduced by taking the total number of all configured carriers of the base station as 8 and the carriers scheduled by the base station as CC4 and CC5 as an example, such as Fig. 9 As shown, the method may include:

[0352] S801. A base station obtains a number of a previous scheduled carrier and a number of a next scheduled carrier of a currently scheduled carrier.

[0353] For example, the carriers scheduled by the base station are CC4 and CC5. Therefore, for CC4, the number of the previous scheduled carrier is 5, and the number of the next scheduled carrier is also 5; for CC5, the number of the previous scheduled carrier is 4, and the number of the next scheduled carrier is also 4.

[0354] S802: The base station obtains a sixth code according to the number of the previous scheduled carrier, the number of the next scheduled carrier, and the fourth mapping relationship, and uses the sixth code as the CAI field.

[0355] Among them, after the base station obtains the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, the base station can obtain the sixth code based on the number of the previous scheduled carrier, the number of the next scheduled carrier and the fourth mapping relationship, and use the sixth code as the CAI field. Since the total number of configured carriers of the base station is equal to 8, and the number of bits of the CAI field can be It can be concluded that the number of bits contained in the CAI field generated by the base station is 5.

[0356] The base station can place the fourth mapping relationship corresponding to a scheduled carrier in a separate table and configure it in the base station. For example, for the current scheduled carrier CC4, the fourth mapping relationship corresponding to CC4 is shown in Table 7. The base station queries Table 7 based on the number of the previous scheduled carrier of CC4, i.e., 5, and the number of the next scheduled carrier, i.e., 5, to obtain the sixth code 01111, and uses the obtained sixth code 01111 as the CAI field of CC4. Similarly, for the current scheduled carrier CC5, the fourth mapping relationship corresponding to CC5 can be queried based on the number of the previous scheduled carrier of CC5, i.e., 4, and the number of the next scheduled carrier, i.e., 4, to obtain the sixth code, and use the obtained sixth code as the CAI field of CC5. The base station can also place the fourth mapping relationships corresponding to all scheduled carriers in a common table and configure it in the base station.

[0357] Table 7

[0358] The number of the previous scheduled carrier The next scheduled carrier CAI Field 0 0 00000 1 0 00001 2 0 00010 3 0 00011 1 1 00100 2 1 00101 3 1 00110 2 2 00111 3 2 01000 3 3 01001 4 4 01010 0 5 01011 1 5 01100 2 5 01101 3 5 01110 5 5 01111 6 5 10000 7 5 10001 0 6 10010 1 6 10011 2 6 10100 3 6 10101 6 6 10110 7 6 10111 0 7 11000 1 7 11001 2 7 11010 3 7 11011 7 7 11100 Reserve Reserve 11101 Reserve Reserve 11110 Reserve Reserve 11111

[0359] It should be noted that the numerical values ​​contained in Table 7 of the embodiment of the present invention are only examples. The embodiment of the present invention does not limit the specific values ​​of the codes corresponding to the number of the previous scheduled carrier and the number of the next scheduled carrier in Table 7 and the reserved specific codes. The specific values ​​of the codes corresponding to the number of the previous scheduled carrier and the number of the next scheduled carrier and the reserved specific codes can be set accordingly according to the needs of the actual scenario.

[0360] S803: The base station carries the CAI field in the DCI and sends it to the UE via the currently scheduled carrier.

[0361] S804. The UE receives a DCI carrying a CAI field sent by the base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI, so as to learn the scheduling status of all configured carriers.

[0362] The CAI field is the sixth code, which is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier.

[0363] After the UE receives the DCI sent by the base station, the UE can receive data according to the DCI. Optionally, in order to ensure the reliability of data transmission, the UE can send HARQ information to the base station to feedback whether it has correctly received the data sent by the base station through all scheduled carriers. Therefore, after S804, the method also includes S805-S807.

[0364] S805. The UE determines, according to the CAI field, a number of a previous scheduled carrier and a number of a next scheduled carrier of at least one currently scheduled carrier.

[0365] Specifically, S805 may be: for each CAI field, the UE obtains the number of the previous scheduled carrier and the number of the next scheduled carrier according to the sixth coding and the fourth mapping relationship.

[0366] Exemplarily, if the UE receives DCI through CC4, and the CAI field contained in the DCI is 01111, the UE queries the fourth mapping relationship corresponding to CC4 according to the sixth code 01111 as shown in Table 7, and obtains that the number of the previous scheduled carrier of CC4 is 5, and the number of the next scheduled carrier is also 5. Similarly, if the UE receives DCI through CC4, the UE can also query the fourth mapping relationship corresponding to CC5 according to the CAI field carried in the DCI, and obtain that the number of the previous scheduled carrier of CC5 is 4, and the number of the next scheduled carrier is 4.

[0367] S806. The UE determines the total number of scheduled carriers according to the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0368] S807: The UE sends HARQ information to the base station according to the total number of scheduled carriers and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0369] It should be noted that the specific description in S801-S807 of the embodiment of the present invention can refer to the description in S701-S708, and the embodiment of the present invention will not be repeated here.

[0370] The carrier scheduling indication method provided by the embodiment of the present invention generates the CAI field of the current scheduled carrier according to the scheduling conditions of all configured carriers configured by the base station, and carries the generated CAI field in the DCI and sends it to the UE through the current scheduled carrier, so that the UE can learn the scheduling conditions of all configured carriers according to the CAI field in the DCI. Since in the present invention, the CAI field for carrier scheduling indication sent by the base station to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field for carrier scheduling indication sent by the base station to the UE indicates the scheduling conditions of each configured carrier in all other configured carriers except the current scheduled carrier, and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, so that the field length of the DCI is reduced, thereby reducing the signaling overhead.

[0371] Moreover, based on the scheduling carrier indication provided in the embodiment of the present invention, the UE can determine the number of bits of the HARQ information to be sent to the base station according to the total number of scheduled carriers of the base station. Since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art in which the UE determines the number of bits of the HARQ information to be sent to the base station according to the total number of all configured carriers, the number of bits of the HARQ information is reduced, thereby reducing the signaling overhead.

[0372] An embodiment of the present invention provides a base station, such as Fig.10 As shown, the base station includes: a processor 91 and a transmitter 92.

[0373] The processor 91 is configured to generate a CAI field of a currently scheduled carrier according to the scheduling conditions of all configured carriers.

[0374] Among them, the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, where M means that from the first configured carrier to the current scheduled carrier, the current scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier.

[0375] The transmitter 92 is configured to carry the CAI field generated by the processor 91 in the DCI and send the DCI to the UE via the currently scheduled carrier.

[0376] Wherein, M is an integer greater than or equal to 1.

[0377] In the embodiment of the present invention, further, when the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the currently scheduled carrier,

[0378] Processor 91 is specifically used to obtain the total number of scheduled carriers and obtain M; obtain a first code according to the total number of scheduled carriers and a preset first mapping relationship, and obtain a second code according to M and a preset second mapping relationship; combine the first code and the second code to generate a CAI field.

[0379] The first mapping relationship is used to indicate the first encoding corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second encoding corresponding to the M.

[0380] Optionally, the number of bits of the first encoding is The number of bits of the second code is

[0381] Wherein, N is the total number of all configured carriers; Indicates the value obtained by rounding log2N upwards.

[0382] In the embodiment of the present invention, further, the processor 91 is further configured to determine before obtaining the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and obtaining the second code according to the M and the preset second mapping relationship. Is it greater than 2?

[0383] Processor 91, specifically used for When M is not greater than 2, a first code is obtained according to the total number of scheduled carriers and the first mapping relationship, and a second code is obtained according to M and the second mapping relationship.

[0384] In the embodiment of the present invention, further, the processor 91 is also used for When it is greater than 2, the first code is obtained according to the total number of scheduled carriers and the first mapping relationship, and the third code is obtained according to M and a preset third mapping relationship; the first code and the third code are combined to generate a CAI field.

[0385] The third mapping relationship is used to indicate the third encoding corresponding to M, and the number of bits of the third encoding is smaller than the number of bits of the second encoding.

[0386] In the embodiment of the present invention, further, when the CAI field is generated according to the first encoding and the second encoding, the number of bits of the CAI field is

[0387] The first code is located at the front of the CAI field. bits, the second code is located after the CAI field bits, or the first code is located after the CAI field bits, the second code is located at the front of the CAI field bits.

[0388] In the embodiment of the present invention, further, when the CAI field is generated according to the first encoding and the third encoding, the number of bits of the CAI field is

[0389] Where a is greater than or equal to 2 and less than The first code is located at the front of the CAI field. bits, the third code is located at the last a bits of the CAI field, or the first code is located at the last a bits of the CAI field. bits, and the third code is located in the first a bits of the CAI field.

[0390] In the embodiment of the present invention, further, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier,

[0391] The processor 91 is specifically configured to obtain the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier; and generate a CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier and a preset fourth mapping relationship.

[0392] In the embodiment of the present invention, further, the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier and the fifth code corresponding to the number of the next scheduled carrier.

[0393] Processor 91 is specifically used to obtain the fourth code according to the number of the previous scheduled carrier and the fourth mapping relationship, and to obtain the fifth code according to the number of the next scheduled carrier and the fourth mapping relationship; and to combine the fourth code and the fifth code to generate the CAI field.

[0394] In an embodiment of the present invention, further, the fourth mapping relationship is used to indicate the sixth code corresponding to the joint coding of the number of the previous scheduled carrier and the number of the next scheduled carrier; the number of bits of the sixth code is less than the sum of the number of bits of the fourth code and the fifth code.

[0395] The processor 91 is specifically configured to obtain the sixth code according to the number of the previous scheduled carrier, the number of the next scheduled carrier and the fourth mapping relationship, and use the sixth code as the CAI field.

[0396] In the embodiment of the present invention, further, when the CAI field is generated according to the fourth encoding and the fifth encoding, the number of bits of the CAI field is

[0397] Among them, the fourth code is located at the front of the CAI field bits, the fifth code is located after the CAI field bits; or, the fourth code is located after the CAI field bits, the fifth code is located at the front of the CAI field bits.

[0398] In the embodiment of the present invention, further, when the sixth code is used as the CAI field, the number of bits of the CAI field may be The specific encoding method of the sixth encoding can be found in the following Fig. 9 The embodiments of the present invention are described.

[0399] It should be noted that the specific working process of each functional module in the base station described in the embodiment of the present invention can refer to the specific description of the corresponding process in the method embodiment, and the embodiment of the present invention will not be described in detail here.

[0400] The base station provided in the embodiment of the present invention generates the CAI field of the current scheduled carrier according to the scheduling conditions of all configured carriers configured by itself, and then carries the generated CAI field in the DCI and sends it to the UE through the current scheduled carrier. Because in the present invention, the CAI field sent by the base station to the UE for carrier scheduling indication indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field sent by the base station to the UE for carrier scheduling indication indicates the scheduling conditions of each configured carrier in all other configured carriers except the current scheduled carrier, and because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, therefore, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, thus reducing the field length of the DCI and thus reducing the signaling overhead.

[0401] Another embodiment of the present invention provides a UE, such as Fig.11 As shown, the UE may include: a receiver 1001 and a processor 1002 .

[0402] The receiver 1001 is configured to receive downlink control information DCI carrying a carrier allocation indication CAI field sent by a base station via at least one currently scheduled carrier.

[0403] Among them, the CAI field is used to indicate the total number of scheduled carriers among all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, where M means that from the first configured carrier to the current scheduled carrier, the current scheduled carrier is the Mth scheduled carrier; or, the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier.

[0404] The processor 1002 is configured to obtain the CAI field in the DCI received by the receiver 1001, so as to obtain the scheduling status of all configured carriers.

[0405] In the embodiment of the present invention, further, the UE may also include: a transmitter 1003.

[0406] The transmitter 1003 is configured to send hybrid automatic repeat request (HARQ) information to the base station after the processor 1002 acquires the CAI field in the DCI.

[0407] The HARQ information is used to feedback whether the data sent by the base station through all scheduled carriers is correctly received, and the number of bits of the HARQ information is equal to the sum of the number of bits required to feedback whether the data sent on each scheduled carrier is correctly received.

[0408] In the embodiment of the present invention, further, when the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the currently scheduled carrier,

[0409] In one possible implementation, the CAI field includes a first code and a second code, the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second code is a code obtained by the base station according to M and a preset second mapping relationship, and the second mapping relationship is used to indicate the second code corresponding to M.

[0410] In a second possible implementation manner, the CAI field includes the first code and a third code, the third code is a code obtained by the base station according to the M and a preset third mapping relationship, and the third mapping relationship is used to indicate the third code corresponding to the M. The number of bits of the third code is less than the number of bits of the second code.

[0411] In the embodiment of the present invention, further, when the CAI field is used to indicate the number of the previous scheduled carrier and the number of the next scheduled carrier of the current scheduled carrier,

[0412] In one possible implementation, the CAI field includes a fourth code and a fifth code; the fourth code is a code obtained by the base station according to the number of the previous scheduled carrier and a preset fourth mapping relationship, and the fifth code is a code obtained by the base station according to the number of the subsequent scheduled carrier and the fourth mapping relationship, and the fourth mapping relationship is used to indicate the fourth code corresponding to the number of the previous scheduled carrier, and the fifth code corresponding to the number of the subsequent scheduled carrier.

[0413] In another possible implementation, the CAI field is a sixth code; the sixth code is a code obtained by the base station according to the number of the previous scheduled carrier, the number of the subsequent scheduled carrier and a preset fourth mapping relationship, and the fourth mapping relationship is used to indicate the sixth code corresponding to the joint encoding of the number of the previous scheduled carrier and the number of the subsequent scheduled carrier.

[0414] In the embodiment of the present invention, further, the processor 1002 is also used to determine the total number of the scheduled carriers according to the CAI field, and determine the cumulative index value M of the at least one currently scheduled carrier.

[0415] The transmitter 1003 is specifically configured to send HARQ information to the base station according to the total number of scheduled carriers determined by the processor 1002 and the cumulative index value M of at least one currently scheduled carrier.

[0416] In an embodiment of the present invention, further, the processor 1002 is also used to determine the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier according to the CAI field, and determine the total number of scheduled carriers according to the number of the previous scheduled carrier and the number of the next scheduled carrier of the at least one currently scheduled carrier.

[0417] The transmitter 1003 is specifically configured to send HARQ information to the base station according to the total number of scheduled carriers determined by the processor 1002 and the number of the previous scheduled carrier and the number of the next scheduled carrier of at least one currently scheduled carrier.

[0418] In the embodiment of the present invention, further, when the CAI field includes the first encoding and the second encoding,

[0419] The processor 1002 is specifically configured to obtain, for the CAI field, the total number of scheduled carriers according to a first mapping relationship and a first encoding, and obtain M according to a second mapping relationship and a second encoding.

[0420] In the embodiment of the present invention, further, when the CAI field includes the first encoding and the third encoding,

[0421] The processor 1002 is specifically configured to obtain, for the CAI field, the total number of scheduled carriers according to the first mapping relationship and the first coding, and obtain M according to the third mapping relationship and the third coding.

[0422] In the embodiment of the present invention, further, when the CAI field includes the fourth code and the fifth code,

[0423] Processor 1002 is specifically configured to obtain, for a CAI field, the number of the previous scheduled carrier according to the fourth coding and the fourth mapping relationship, and obtain the number of the next scheduled carrier according to the fifth coding and the fourth mapping relationship.

[0424] In the embodiment of the present invention, further, when the CAI field is the sixth encoding,

[0425] The processor 1002 is specifically configured to obtain, for a CAI field, the number of the previous scheduled carrier and the number of the next scheduled carrier according to the sixth encoding and the fourth mapping relationship.

[0426] It should be noted that the specific working process of each functional module in the UE described in the embodiment of the present invention can refer to the specific description of the corresponding process in the method embodiment, and the embodiment of the present invention will not be described in detail here.

[0427] The UE provided in the embodiment of the present invention receives a DCI carrying a CAI field sent by a base station through at least one currently scheduled carrier, and obtains the CAI field in the DCI so as to learn the scheduling status of all configured carriers. Since in the present invention, the CAI field received by the UE indicates the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value of the currently scheduled carrier, or indicates the number of the previous scheduled carrier and the number of the next scheduled carrier of the currently scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduled carrier, while in the prior art, the DAI2 field sent by the base station to the UE for carrier scheduling indication indicates the scheduling status of each configured carrier in all other configured carriers except the currently scheduled carrier, and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art, when the number of carriers configured by the base station is large, the CAI field generated by the base station according to the method provided by the embodiment of the present invention contains fewer bits, thus reducing the field length of the DCI and thus reducing the signaling overhead.

[0428] Moreover, based on the scheduling carrier indication provided in the embodiment of the present invention, the UE can determine the number of bits of the HARQ information to be sent to the base station according to the total number of scheduled carriers of the base station. Since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, compared with the prior art in which the UE determines the number of bits of the HARQ information to be sent to the base station according to the total number of all configured carriers, the number of bits of the HARQ information is reduced, thereby reducing the signaling overhead.

[0429] Through the description of the above implementation methods, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0430] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0431] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0432] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0433] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a device (which can be a single-chip microcomputer, chip, etc.) or a processor (English: processor) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

[0434] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A communication system, characterized in that: Including base stations and terminals, The base station is used to send a carrier allocation indication field, where the carrier allocation indication field is used to indicate the total number of scheduled carriers and a cumulative value M of the scheduled carriers, where M is the cumulative value of the scheduled carriers accumulated to the current scheduled carrier, and M is an integer greater than or equal to 1; The terminal is used to receive the carrier allocation indication field; wherein, The configured carrier includes a scheduled carrier, the configured carrier has an index value, and the M is accumulated to the current scheduled carrier in ascending order of the index value.

2. The communication system according to claim 1, characterized in that The terminal is further configured to send feedback information of a hybrid automatic repeat request according to the carrier allocation indication field; The base station is further configured to receive the feedback information.

3. The communication system according to claim 1 or 2, characterized in that: The carrier allocation indication field is located in the downlink control information.

4. The communication system according to claim 1 or 2, characterized in that: The currently scheduled carrier is the Mth scheduled carrier.

5. The communication system according to claim 1 or 2, characterized in that: The carrier allocation indication field includes a first code and a second code, the first code is used to indicate the total number of the scheduled carriers, and the second code is used to indicate the M.

6. The communication system according to claim 5, characterized in that The first code has a first mapping relationship with the total number of scheduled carriers, and the second code has a second mapping relationship with M.

7. The communication system according to claim 6, characterized in that The second mapping relationship includes: The second code is 00, and M is 1, 5, 9 or 13; The second code is 01, and M is 2, 6, 10 or 14; The second code is 10, and M is 3, 7, 11 or 15; and The second code is 11, and M is 4, 8, 12 or 16.

8. The communication system according to claim 7, characterized in that When ⌈log2N⌉ is greater than 2, the mapping relationship between the second encoding and the M satisfies the second mapping relationship, where N is the total number of configured carriers.

9. The communication system according to claim 2, characterized in that The terminal is further configured to send feedback information of a hybrid automatic repeat request according to the carrier allocation indication field, including: Determine the total number of the scheduled carriers and the M according to the carrier allocation indication field; The feedback information is sent to the base station according to the total number of the scheduled carriers and the M.

10. The communication system according to claim 2 or 9, characterized in that: The number of bits of the feedback information is equal to the sum of the number of bits required to feedback whether the data on the scheduled carrier is correctly received.

11. The communication system according to claim 2, characterized in that The feedback information is carried on a primary carrier; or, the feedback information is carried on a primary carrier and a secondary carrier.

12. The communication system according to any one of claims 1, 2, 6 to 8, characterized in that: The scheduled carrier is a carrier used for data communication in the configured carriers.

13. A method for receiving an indication, characterized in that: include: A carrier allocation indication field is received, where the carrier allocation indication field is used to indicate the total number of scheduled carriers and the cumulative value M of the scheduled carriers, where M is the cumulative value of the scheduled carriers accumulated to the current scheduled carrier, and M is an integer greater than or equal to 1; wherein, The configured carrier includes a scheduled carrier, the configured carrier has an index value, and the M is accumulated to the current scheduled carrier in ascending order of the index value.

14. The method according to claim 13, characterized in that Also includes: The feedback information of the hybrid automatic repeat request is sent according to the carrier allocation indication field.

15. The method according to claim 13 or 14, characterized in that: The carrier allocation indication field is located in the downlink control information.

16. The method according to claim 13 or 14, characterized in that: The currently scheduled carrier is the Mth scheduled carrier.

17. The method according to claim 13 or 14, characterized in that: The carrier allocation indication field includes a first code and a second code, the first code is used to indicate the total number of the scheduled carriers, and the second code is used to indicate the M.

18. The method according to claim 17, characterized in that The first code has a first mapping relationship with the total number of scheduled carriers, and the second code has a second mapping relationship with M.

19. The method according to claim 18, characterized in that The second mapping relationship includes: When the second code is 00, M is 1, 5, 9 or 13; When the second code is 01, M is 2, 6, 10 or 14; When the second code is 10, M is 3, 7, 11 or 15; and, When the second code is 11, M is 4, 8, 12 or 16.

20. The method of claim 19, wherein: When ⌈log2N⌉ is greater than 2, the mapping relationship between the second encoding and the M satisfies the second mapping relationship, where N is the total number of the configured carriers.

21. The method of claim 14, wherein: The sending, according to the carrier allocation indication field, feedback information of a hybrid automatic repeat request includes: Determine the total number of the scheduled carriers and the M according to the carrier allocation indication field; The feedback information is sent according to the total number of the scheduled carriers and the M.

22. The method according to claim 14 or 21, characterized in that: The number of bits of the feedback information is equal to the sum of the number of bits required to feedback whether the data on the scheduled carrier is correctly received.

23. The method according to claim 14 or 21, characterized in that: The feedback information is carried on a primary carrier; or, the feedback information is carried on a primary carrier and a secondary carrier.

24. The method according to any one of claims 13, 14, 18 to 20, characterized in that The scheduled carrier is a carrier used for data communication in the configured carriers.

25. A method of indicating, characterized in that: include: Send a carrier allocation indication field, where the carrier allocation indication field is used to indicate the total number of scheduled carriers and the cumulative value M of the scheduled carriers, where M is the cumulative value of the scheduled carriers accumulated to the current scheduled carrier, and M is an integer greater than or equal to 1; wherein, The configured carrier includes a scheduled carrier, the configured carrier has an index value, and the M is accumulated to the current scheduled carrier in ascending order of the index value.

26. The method of claim 25, wherein: Also includes: Receive hybrid automatic repeat request feedback information.

27. The method according to claim 25 or 26, characterized in that The carrier allocation indication field is located in the downlink control information.

28. The method according to claim 25 or 26, characterized in that The currently scheduled carrier is the Mth scheduled carrier.

29. The method according to claim 25 or 26, characterized in that The carrier allocation indication field includes a first code and a second code, the first code is used to indicate the total number of the scheduled carriers, and the second code is used to indicate the M.

30. The method of claim 29, wherein: The first code has a first mapping relationship with the total number of scheduled carriers, and the second code has a second mapping relationship with M.

31. The method of claim 30, wherein: The second mapping relationship includes: When the M is 1, 5, 9 or 13, the second code is 00; When the M is 2, 6, 10 or 14, the second code is 01; When the M is 3, 7, 11 or 15, the second code is 10; and, When the M is 4, 8, 12 or 16, the second code is 11.

32. The method of claim 31, wherein: When ⌈log2N⌉ is greater than 2, the mapping relationship between the second encoding and the M satisfies the second mapping relationship, where N is the total number of the configured carriers.

33. The method of claim 26, wherein: The number of bits of the feedback information is equal to the sum of the number of bits required to feedback whether the data on the scheduled carrier is correctly received.

34. The method according to claim 26 or 33, characterized in that The feedback information is carried on a primary carrier; or, the feedback information is carried on a primary carrier and a secondary carrier.

35. The method according to any one of claims 25, 26, 30 to 32, characterized in that The scheduled carrier is a carrier used for data communication in the configured carriers.

36. A communication device, characterized in that: The method comprises means for implementing the method as claimed in any one of claims 13 to 24.

37. The communication device according to claim 36, characterized in that The communication device is a terminal.

38. A communication device, characterized in that: Comprising means for implementing the method as claimed in any one of claims 25 to 35.

39. The communication device according to claim 38, characterized in that The communication device is a base station.

40. A communication device, characterized in that: The device comprises a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the device executes the method according to any one of claims 13 to 24.

41. The communication device according to claim 40, characterized in that The communication device is a terminal.

42. A communication device, characterized in that: The device comprises a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the device executes the method according to any one of claims 25 to 35.

43. The communication device according to claim 42, characterized in that The communication device is a base station.

44. A computer-readable storage medium, characterized in that The computer-readable storage medium stores instructions, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 13 to 24 and 25 to 35.

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