Search space determination method, configuration method, terminal, and network-side device

Abstract

The present invention provides a search space determination method, configuration method, terminal, and network-side equipment, belonging to the field of wireless communication technology. The search space determination method applied to the terminal includes: determining the search space for scheduling the downlink control channel of the uplink carrier according to the uplink carrier group to which the uplink carrier belongs; wherein the uplink carrier group is a grouping of uplink carriers to be scheduled. Applying the present invention when scheduling multiple uplink carriers for uplink transmission can reduce the collision probability of the downlink control channel, thereby enabling the uplink carriers to be scheduled normally. In addition, compared with the solution of configuring a search space for each uplink carrier, grouping can reduce the number of search spaces, reduce the energy consumption of the terminal detecting the control channel, and reduce the complexity of terminal detection.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular to a search space determination method, a configuration method, a terminal, and a network-side device. Background Art

[0002] Supplementary Uplink (SUL) technology is a new technology introduced in 5G. By bundling Frequency Division Duplexing (FDD) uplink carriers with Time Division Duplexing (TDD) carriers at different frequencies, it can effectively utilize the low-frequency FDD uplink carriers to improve the system's uplink coverage and uplink transmission data rate, while reducing transmission latency.

[0003] Related technologies support dynamic selection of an uplink (UL) carrier or a SUL carrier by a user equipment (UE) for uplink traffic channel transmission. When both the SUL and UL carriers are configured with the higher-layer parameter pusch-Config, an information field (i.e., UL / SUL indicator) is added to the downlink control channel formats (DCI formats 0-0, 0-1, and 0-2) used to schedule Physical Uplink Shared Channel (PUSCH) transmissions to indicate which carrier the scheduled PUSCH is located on. For specific indications, see Table 1 below.

[0004] Table 1 UL / SUL indication

[0005]

[0006] When the SUL carrier is not configured or the SUL carrier is configured but only one carrier is configured with PUSCH transmission, this bit is not needed for indication.

[0007] Because SUL transmission uses only one downlink carrier, downlink control channel detection only needs to be configured for that one downlink carrier. For example, the search space and control channel resource set (CORESET) information must be configured. The terminal then detects downlink control channels based on the configured time-frequency resource locations. Furthermore, since only one uplink carrier is scheduled at a time, there's no need to configure control channel detection spaces for both the UL and SUL. Instead, a shared search space is used for both, and the scheduled carrier is indicated to the terminal via the UL / SUL.

[0008] However, when transmissions on multiple UL carriers need to be scheduled in the same time slot, a collision problem of downlink control channels may occur, resulting in some carriers being unable to be scheduled. Summary of the Invention

[0009] In view of this, the present invention provides a search space determination method, configuration method, terminal and network side equipment for solving the current problem of downlink control channel collision when it is necessary to schedule transmission on multiple uplink carriers in the same time slot.

[0010] To solve the above technical problems, in a first aspect, the present invention provides a search space determination method, applied to a terminal, comprising:

[0011] The search space for the downlink control channel that schedules the uplink carrier is determined according to the uplink carrier group to which the uplink carrier belongs; wherein,

[0012] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0013] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0014] Optionally, the uplink carrier group corresponds one-to-one to the search space of the downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0015] Optionally, the determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier includes:

[0016] Determine a search space for a downlink control channel that schedules the second uplink carrier based on a group number of an uplink carrier group to which the first uplink carrier belongs and a group number of an uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is an uplink carrier indicated in a downlink control channel detected in a first search space, and the first search space is a search space for a downlink control channel that schedules a downlink carrier or a search space determined based on preset parameters.

[0017] Optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or,

[0018] The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

[0019] Optionally, before determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier, the method further includes:

[0020] Receive first information sent by a network-side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

[0021] Optionally, before determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier, the method further includes:

[0022] Second information sent by a network-side device is received, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

[0023] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0024] Optionally, the method further includes:

[0025] Third information sent by the network-side device is received, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0026] Optionally, the method further includes:

[0027] receiving fourth information sent by the network-side device, where the fourth information is used to indicate at least one of the following:

[0028] Information on the order or index of uplink carriers to be scheduled;

[0029] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0030] The number of uplink carriers in each of the uplink carrier groups.

[0031] In a second aspect, the present invention further provides a search space configuration method, applied to a network side device, comprising:

[0032] Second information is sent to the terminal, where the second information is used to configure N search spaces of downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0033] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0034] Optionally, the method further includes:

[0035] Third information is sent to the terminal, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0036] Optionally, the method further includes:

[0037] Sending fourth information to the terminal, where the fourth information is used to indicate at least one of the following:

[0038] Information on the order or index of uplink carriers to be scheduled;

[0039] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0040] The number of uplink carriers in each of the uplink carrier groups.

[0041] Optionally, the method further includes:

[0042] Sending first information to the terminal, the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is the search space of the downlink control channel that schedules the downlink carrier or the search space determined according to preset parameters.

[0043] In a third aspect, the present invention further provides a terminal, comprising:

[0044] The search space determination module is configured to determine the search space for the downlink control channel that schedules the uplink carrier according to the uplink carrier group to which the uplink carrier belongs; wherein,

[0045] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0046] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0047] Optionally, the uplink carrier group corresponds one-to-one to the search space of the downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0048] Optionally, the search space determination module includes:

[0049] A determination unit is used to determine the search space of the downlink control channel for scheduling the second uplink carrier based on the group number of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is the uplink carrier indicated in the downlink control channel detected in the first search space, and the first search space is the search space of the downlink control channel for scheduling the downlink carrier or the search space determined according to preset parameters.

[0050] Optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or,

[0051] The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

[0052] Optionally, the terminal further includes:

[0053] A scheduling indication receiving module is used to receive first information sent by a network-side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

[0054] Optionally, the terminal further includes:

[0055] The configuration information receiving module is used to receive second information sent by a network side device, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

[0056] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0057] Optionally, the terminal further includes:

[0058] The corresponding relationship indication receiving module is used to receive third information sent by the network side device, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0059] Optionally, the terminal further includes:

[0060] A packet information receiving module, configured to receive fourth information sent by a network-side device, wherein the fourth information is used to indicate at least one of the following:

[0061] Information on the order or index of uplink carriers to be scheduled;

[0062] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0063] The number of uplink carriers in each of the uplink carrier groups.

[0064] In a fourth aspect, the present invention further provides a network-side device, including:

[0065] The search space configuration module is used to send second information to the terminal, where the second information is used to configure search spaces of N downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0066] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0067] Optionally, the network side device further includes:

[0068] The corresponding relationship indication module is configured to send third information to the terminal, where the third information is configured to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0069] Optionally, the network side device further includes:

[0070] a group information sending module, configured to send fourth information to the terminal, wherein the fourth information is used to indicate at least one of the following;

[0071] Information on the order or index of uplink carriers to be scheduled;

[0072] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0073] The number of uplink carriers in each of the uplink carrier groups.

[0074] Optionally, the network side device further includes:

[0075] A scheduling indication sending module is used to send first information to the terminal, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, and the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is a search space of a downlink control channel for scheduling downlink carriers or a search space determined according to preset parameters.

[0076] In a fifth aspect, the present invention further provides a terminal, comprising: a transceiver and a processor;

[0077] The processor is configured to determine a search space for a downlink control channel that schedules an uplink carrier according to an uplink carrier group to which the uplink carrier belongs; wherein,

[0078] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0079] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0080] Optionally, the uplink carrier group corresponds one-to-one to the search space of the downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0081] Optionally, the processor is used to determine the search space of the downlink control channel for scheduling the second uplink carrier based on the group number of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs; wherein, the first uplink carrier is the uplink carrier indicated in the downlink control channel detected in the first search space, and the first search space is the search space of the downlink control channel for scheduling the downlink carrier or the search space determined according to preset parameters.

[0082] Optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or,

[0083] The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

[0084] Optionally, the transceiver is used to receive first information sent by a network side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

[0085] Optionally, the transceiver is used to receive second information sent by a network-side device, where the second information is used to configure search spaces of downlink control channels of N scheduled uplink carriers for N uplink carrier groups.

[0086] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0087] Optionally, the transceiver is used to receive third information sent by the network side device, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0088] Optionally, the transceiver is used to receive fourth information sent by the network side device, where the fourth information is used to indicate at least one of the following:

[0089] Information on the order or index of uplink carriers to be scheduled;

[0090] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0091] The number of uplink carriers in each of the uplink carrier groups.

[0092] In a sixth aspect, the present invention further provides a network side device, comprising: a transceiver and a processor;

[0093] The transceiver is used to send second information to the terminal, where the second information is used to configure N search spaces of downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0094] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0095] Optionally, the transceiver is further used to send third information to the terminal, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0096] Optionally, the transceiver is further configured to send fourth information to the terminal, where the fourth information is configured to indicate at least one of the following:

[0097] Information on the order or index of uplink carriers to be scheduled;

[0098] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0099] The number of uplink carriers in each of the uplink carrier groups.

[0100] Optionally, the transceiver is also used to send first information to the terminal, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, and the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is the search space of the downlink control channel that schedules the downlink carrier or a search space determined according to preset parameters.

[0101] In the seventh aspect, the present invention also provides a terminal, comprising a memory, a processor, and a program stored on the memory and runnable on the processor; when the processor executes the program, it implements any one of the steps in the above-mentioned search space determination method applied to the terminal.

[0102] In the eighth aspect, the present invention also provides a network side device, including a memory, a processor, and a program stored on the memory and runnable on the processor; when the processor executes the program, it implements any one of the steps in the above-mentioned search space configuration method applied to the network side device.

[0103] In the ninth aspect, the present invention also provides a readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps of any of the above-mentioned search space determination methods applied to a terminal or the steps of any of the above-mentioned search space configuration methods applied to a network side device.

[0104] The beneficial effects of the above technical solution of the present invention are as follows:

[0105] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] Figure 1 This is a flow chart of a method for determining a search space in Embodiment 1 of the present invention;

[0107] Figure 2 This is a flowchart of a search space configuration method in Embodiment 2 of the present invention;

[0108] Figure 3 This is a schematic diagram of the structure of a terminal in Embodiment 3 of the present invention;

[0109] Figure 4 This is a schematic diagram of the structure of a network-side device in Embodiment 4 of the present invention;

[0110] Figure 5 This is a schematic diagram of the structure of a terminal in Embodiment 5 of the present invention;

[0111] Figure 6 This is a schematic structural diagram of a network-side device in Embodiment 6 of the present invention;

[0112] Figure 7 This is a schematic diagram of the structure of a terminal in Embodiment 7 of the present invention;

[0113] Figure 8 This is a structural diagram of a network-side device in Example 8 of the present invention. DETAILED DESCRIPTION

[0114] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0115] The current related technologies only support the configuration of one SUL carrier. It is generally believed that the carrier bandwidth corresponding to SUL is smaller and the frequency is lower, while the carrier bandwidth corresponding to UL is larger and the frequency is higher. For users at the edge of the cell, due to the large propagation loss and limited transmission power, it is more appropriate to select SUL with small propagation loss to support better coverage performance; while for users at the center of the cell, due to the small propagation loss, the large bandwidth of UL can be selected for high-speed uplink data transmission. At the same time, since the SUL carrier bandwidth is usually small, it makes little sense for users at the center of the cell to use both UL and SUL carriers for uplink data transmission. Therefore, the related technologies only support transmission on either UL carrier or SUL carrier, and do not support PUSCH transmission on both UL and SUL carriers at the same time.

[0116] However, during the deployment of the existing network, the inventors found that the 30MHz TDD spectrum in the 1.9GHz band, the 15MHz TDD spectrum in the 2.0GHz band, and the 50MHz TDD spectrum in the 2.3GHz band are all lower frequency bands with better coverage, and there is a 100MHz TDD available frequency in the 4.9GHz band. Therefore, the inventors believe that it is possible to consider using these bandwidth resources of 1.9G, 2.0G, and 2.3G with the 100MHz TDD spectrum in the 4.9GHz band for SUL operation. For users in the center of the cell, if data transmission can be carried out on the UL and multiple SULs at the same time, the user's uplink peak rate will be greatly improved, achieving an effect similar to carrier aggregation (CA), while at the same time, there is no need to configure an independent downlink carrier for each uplink carrier like CA, so that the frequency resources of the 1.9GHz, 2.0GHz, and 2.3GHz bands can be used for uplink to meet the high uplink rate requirements of many 5G services.

[0117] However, when supporting concurrent uplink PUSCH scheduling of multiple SULs, if flexible scheduling of any one or more SUL and UL carriers is to be achieved, according to existing implementations, there is no differentiated search space for different SUL carriers. When transmissions on multiple uplink carriers need to be scheduled in the same time slot, a collision problem of downlink control channels may occur, resulting in some carriers being unable to be scheduled.

[0118] Another way is to use a similar method to CA. When cross-carrier scheduling is used for carrier aggregation, the Physical Downlink Control Channel (PDCCH) transmission of the scheduled carrier is located on the scheduling carrier. That is, in addition to sending the PDCCH scheduling information for the carrier, the scheduling carrier also needs to send PDCCHs on other scheduled carriers to schedule the transmission of their uplink and downlink traffic channels. For the search space set s, it is associated with CORESET p, and its time slot The first The control channel element (CCE) corresponding to the PDCCH candidate is (or, for the search space set s associated with CORESET p, the time slot PDCCH candidates in the search space set The occupied CCEs are given by the following formula (1):

[0119]

[0120] Among them, for the Common Search Space (CSS):

[0121] For user-specific search space (UE-specific search space, USS): Y p,-1 =n RNTI ≠0; A p With the different control resource sets p, there are three different values: when pmod3=0, A p =39827; when pmod3=1, A p =39829; pmod 3 = 2 when A p =39839;D=65537;n RNTI is the Cell Radio Network Temporary Identifier (C-RNTI) value; is the number of all configured CCE aggregation levels L in the control resource set p that controls S. CI The maximum value of

[0122] i=0,…,L-1; L is the aggregation level;

[0123] N CCE,p is the number of CCEs in CORESET p;

[0124] n CI It is the value of the carrier indicator field (CIF) in the DCI when cross-carrier scheduling is performed, indicating the carrier index of the scheduled carrier corresponding to the control channel.

[0125] in is n CI The number of PDCCH candidates corresponding to the aggregation level L of the search space s in the corresponding cell.

[0126] This method can be used to see that for different scheduled carriers, n CI , the corresponding search space starting points are different. That is, different carriers have independent search spaces to detect control channels.

[0127] The disadvantage of this approach is that the terminal needs to linearly increase the number of search spaces according to the number of scheduled carriers. For the terminal, this linear increase increases the energy consumption of the terminal in detecting the control channel and also increases the complexity of terminal detection.

[0128] However, SUL carriers differ from CA in that they only have uplink scheduling PDCCHs, not downlink scheduling PDCCHs. Therefore, to reduce the complexity of control channel detection, the control channel detection search space for multiple SUL carriers can be optimized. See the following embodiments for details.

[0129] See also Figure 1 , Figure 1 A flowchart of a method for determining a search space provided in a first embodiment of the present invention is provided. The method is applied to a terminal and includes the following steps:

[0130] Step 11: Determine the search space for the downlink control channel that schedules the uplink carrier according to the uplink carrier group to which the uplink carrier belongs; wherein,

[0131] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0132] It should be noted that at least one of the uplink carrier groups includes two or more uplink carriers, and the number of uplink carriers in each uplink carrier group may be equal or unequal.

[0133] For example, all uplink carriers to be scheduled can be divided into multiple uplink carrier groups. One uplink carrier group can include multiple uplink carriers to be scheduled. Of course, it is not limited to each uplink carrier group to include multiple uplink carriers to be scheduled. Some uplink carrier groups may include only one uplink carrier. The uplink carriers in an uplink carrier group share one search space. Then, the terminal can determine the search space corresponding to each uplink carrier in the uplink carrier group by determining the search space corresponding to the uplink carrier group. Specifically, it determines the search space of the PDCCH that schedules the uplink carriers in the uplink carrier group. Afterwards, the terminal can detect the PDCCH that schedules the uplink carriers in the uplink carrier group in the determined search space.

[0134] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0135] The following example illustrates the above search space determination method.

[0136] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0137] The supplementary uplink carrier is a SUL carrier, and the non-supplementary uplink carrier is a non-SUL carrier, which may also be referred to as a UL carrier, a normal uplink carrier, or an ordinary uplink carrier.

[0138] That is, in the embodiment of the present invention, only the supplementary uplink carriers may be grouped, and the non-supplementary uplink carriers may be grouped separately; alternatively, the non-supplementary uplink carriers and the supplementary uplink carriers may be mixed together for grouping.

[0139] In one optional specific implementation manner, the uplink carrier group corresponds one-to-one to a search space of a downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0140] That is to say, in an embodiment of the present invention, each uplink carrier group corresponds to a unique search space. For example, the search space of the PDCCH that schedules the uplink carrier can be directly determined based on the group number (also called index number) or other identifier of the uplink carrier group to which the uplink carrier belongs.

[0141] The one-to-one correspondence between uplink carrier groups and search spaces, or the unique search space corresponding to each uplink carrier group, is pre-agreed between the network device and the terminal. Alternatively, the network device may send the one-to-one correspondence between uplink carrier groups and search spaces to the terminal in advance. The terminal can directly determine the search space to be detected based on this correspondence.

[0142] The grouping of uplink carriers, i.e., uplink carrier groups, may be agreed upon in advance by the network-side device and the terminal, or the network-side device may group the uplink carriers to be scheduled and then send the grouping information to the terminal, so that the terminal can know which uplink carrier or carriers belong to which uplink carrier group.

[0143] The above method is simple and direct. The difference from the prior art is that in the case of existing CA, since the uplink carrier and the downlink carrier are aggregated at the same time, the search space of the same carrier needs to detect both the PDCCH corresponding to the downlink scheduling and the PDCCH corresponding to the uplink scheduling. Therefore, an independent search space is reserved for each carrier. In the case of multi-carrier SUL, there is only one downlink carrier and multiple uplink carriers. In the search space reserved for each carrier, only the PDCCH corresponding to the uplink scheduling will appear. At this time, if an independent search space is reserved for each uplink carrier, the problem of high terminal blind detection complexity is faced. Therefore, the embodiment of the present invention configures a common search space for multiple SULs to reduce the complexity of user blind detection.

[0144] For example, the terminal may determine the CCEs of the search space corresponding to each uplink carrier group according to the following formula:

[0145]

[0146] Among them, n SCIG is the group number (or index) of the uplink carrier group. For other parameters, please refer to the above formula (1) and will not be repeated here.

[0147] In the embodiment of the present invention, if only SUL carriers are grouped, then n SCIG The value of is a positive integer (i.e. 1, 2, 3, ...). For example, if a search space is configured for every two SUL carriers, and there are 4 SUL carriers in total, they will be divided into two SUL carrier groups, with group numbers 1 and 2 respectively. In this case, the UL carrier can be grouped separately, and the group number can be 0. If the UL carrier and the SUL carrier are mixed together for grouping, then n SCIG The value of is an integer (i.e. 0, 1, 2, 3...).

[0148] In another optional specific implementation, determining the search space for the downlink control channel for scheduling the uplink carrier according to the uplink carrier group to which the uplink carrier belongs includes:

[0149] Based on the group number (i.e., index number) of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs, the search space for the downlink control channel for scheduling the second uplink carrier is determined; wherein, the first uplink carrier is the uplink carrier indicated in the downlink control channel detected in the first search space, and the first search space is the search space for the downlink control channel for scheduling the downlink carrier or the search space determined according to preset parameters.

[0150] Further optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers. Alternatively, the second uplink carrier is an uplink carrier with an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier with an index less than that of the first uplink carrier, and the uplink carrier group is obtained by grouping according to the size of the uplink carrier index.

[0151] Before determining the search space for scheduling the downlink control channel of the second uplink carrier based on the group number (i.e., index number) of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs, the method may further include: performing detection in the first search space.

[0152] In an embodiment of the present invention, uplink carrier groups are grouped according to the order of the uplink carriers. That is, in any two uplink carrier groups, all uplink carriers in one uplink carrier group are ordered before (or after) the uplink carriers in the other uplink carrier group. The uplink carriers can be ordered specifically according to the index numbers of the uplink carriers, or they can be ordered in other ways. The order of the uplink carriers is pre-agreed upon between the network device and the terminal, or the network device determines the order of the uplink carriers and notifies the terminal.

[0153] In the embodiment of the present invention, the search space corresponding to the uplink carrier group is not uniquely determined, that is, the correspondence between the search space and the uplink carrier group is not fixed, but varies with the uplink carrier actually scheduled by the network side device. Specifically, the network side device will place the PDCCH of the uplink carrier that is ranked first (or last) in the actually scheduled uplink carrier in the same search space as the PDCCH of the scheduled downlink carrier or in the 0th search space. The search space of the PDCCH of the scheduled downlink carrier is generally also the 0th search space, and the search space can be determined according to preset parameters. For example, at this time, it can be considered that the first uplink carrier belongs to the 0th uplink carrier group. Referring to the above formula (2), the determination formula of the CCE in the 0th search space can be:

[0154]

[0155] In the above formula, the meaning of each parameter can be found in the above formula (2) and will not be repeated here.

[0156] In an embodiment of the present invention, the uplink carrier group to which each uplink carrier belongs may be fixed. Alternatively, it may not be fixed, but may vary depending on the uplink carrier actually scheduled by the network-side device. For example, assuming there are four SUL carriers, with corresponding indexes of 1 to 4, and the number of uplink carriers in each uplink carrier group is 2 (if the number of uplink carriers to be grouped is an odd number, the number of uplink carriers in the last uplink carrier group may be 1). If the uplink carrier with the highest ranking among the uplink carriers actually scheduled by the network-side device is SUL1, then SUL2 and SUL3 belong to the first uplink carrier group, and SUL4 belongs to the second uplink carrier group. If the uplink carrier with the highest ranking among the uplink carriers actually scheduled by the network-side device is SUL2, then SUL3 and SUL4 belong to the first uplink carrier group.

[0157] The determining, according to the group number of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs, a search space for scheduling a downlink control channel of the second uplink carrier may specifically be:

[0158] The search space for scheduling the downlink control channel of the second uplink carrier may be determined based on the difference between the group number of the uplink carrier group to which the second uplink carrier belongs and the group number of the uplink carrier group to which the first uplink carrier belongs. For example, the search space for scheduling the downlink control channel of the second uplink carrier may be determined based on the following formula:

[0159]

[0160] The value of z is the difference between the group number of the uplink carrier group to which the second uplink carrier belongs and the group number of the uplink carrier group to which the first uplink carrier belongs. The value of z varies depending on the uplink carrier group to which the second uplink carrier belongs, and is a positive value.

[0161] The above-mentioned method of determining the search space of the downlink control channel of the second uplink carrier can be applied to scenarios where the uplink carrier group to which each uplink carrier belongs is fixed, and can also be applied to scenarios where the uplink carrier group to which the uplink carrier belongs changes dynamically.

[0162] If the uplink carrier group to which the uplink carrier belongs changes dynamically, then it can be considered that the group number of the uplink carrier group to which the first uplink carrier belongs is 0, and the group number of the uplink carrier group to which the second uplink carrier belongs is 1, 2, 3..., that is, the value of z is 1, 2, 3..., and the maximum value of z depends on the number of groups of the second uplink carrier.

[0163] Alternatively, z can be calculated as follows: x is the index of the first uplink carrier, y is the index of the second uplink carrier, Q is the number of uplink carriers in each uplink carrier group, and Q is greater than 1. Of course, when the number of uplink carriers to be grouped is not an integer multiple of Q, the number of uplink carriers in one uplink carrier group may be allowed to be less than Q. In other words, the terminal may determine its search space for subsequent SUL indexes y in sequence based on the UL or SUL index x indicated in the control channel of the PUSCH detected in the first search space.

[0164] Of course, if the uplink carrier group to which the uplink carrier belongs changes dynamically, it can be described as: determining the search space for scheduling the downlink control channel of the second uplink carrier according to the group number of the uplink carrier group to which the second uplink carrier belongs.

[0165] Those skilled in the art should understand that if the first uplink carrier is both the uplink carrier with the highest ranking among the uplink carriers actually scheduled and the uplink carrier with the lowest ranking among all the uplink carriers to be scheduled, or the first uplink carrier is both the uplink carrier with the lowest ranking among the uplink carriers actually scheduled and the uplink carrier with the highest ranking among all the uplink carriers to be scheduled, or the first uplink carrier itself belongs to the last uplink carrier group, there will be no search space for other uplink carrier groups after the first search space, and there is no need to determine the search space again.

[0166] In an embodiment of the present invention, the terminal only needs to determine and detect the search space corresponding to the uplink carrier group to which the second uplink carrier ranked after the first uplink carrier belongs, and does not need to determine and detect the search space corresponding to the uplink carrier group to which the uplink carrier ranked before the first uplink carrier belongs. This can further reduce the number of search spaces that the terminal needs to detect, reduce the detection complexity of the terminal, and reduce the power consumption of the terminal.

[0167] The following example illustrates how to determine the search space corresponding to the uplink carrier when the correspondence between the search space and the uplink carrier group is not fixed:

[0168] Assume there are four SUL carriers, with corresponding indexes 1, 2, 3, and 4. The uplink carriers are sorted as follows: UL carrier, SUL1 carrier, SUL2 carrier, SUL3 carrier, and SUL4 carrier. The terminal first performs downlink control channel detection in the following search space: If the detected downlink control information (DCI) indicates that the scheduled SUL is index 2, it means that there is no uplink scheduling for the normal UL carrier and SUL1 in the current time slot. Therefore, only the search space needs to be determined for SUL3 and SUL4. Assuming Q = 2, the PDCCHs corresponding to the remaining SUL3 and SUL4 can be located in the same group of search spaces. Therefore, only the search space of the corresponding uplink carrier group needs to be determined. For SUL3 and SUL4, their corresponding z values ​​are both 1.

[0169] Therefore, their search space is:

[0170]

[0171] It should be noted that the configuration needs to be based on the maximum number of search spaces required for uplink. For example, if there are 4 SUL carriers, in addition to the normal search space, 2 search spaces need to be configured (corresponding to Q=2).

[0172] In this embodiment of the present invention, by grouping uplink carriers and allowing uplink carriers within an uplink carrier group to share a common search space, the number of search spaces is reduced, thereby lowering user detection complexity. Furthermore, by establishing a correspondence between the search spaces of SUL carriers and the carriers scheduled in the detected DCI, the number of search spaces required to be detected by the user is further reduced, thereby lowering user detection complexity.

[0173] Optionally, before determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier, the method further includes:

[0174] Receive first information sent by a network-side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking among the scheduled uplink carriers (or the first uplink carrier is the first uplink carrier scheduled among the sorted uplink carriers to be scheduled) or the uplink carrier with the smallest carrier index, or is the uplink carrier with the lowest ranking among the scheduled uplink carriers (or the first uplink carrier is the last uplink carrier scheduled among the sorted uplink carriers to be scheduled) or the uplink carrier with the largest carrier index.

[0175] In an embodiment of the present invention, the network-side device explicitly notifies the terminal that the first uplink carrier scheduled by the PDCCH in the first search space is the uplink carrier with the highest ranking among all actually scheduled uplink carriers, or that the PDCCH for uplink transmission of the corresponding carrier detected in the first search space indicates that it is the lowest scheduled carrier in the ranking, and in subsequent search spaces, no UL or SUL carriers with lower rankings will be scheduled. Or the network-side device explicitly notifies the terminal that the first uplink carrier scheduled by the PDCCH in the first search space is the uplink carrier with the lowest ranking among all actually scheduled uplink carriers, and in subsequent search spaces, no UL or SUL carriers with higher rankings will be scheduled.

[0176] Of course, in other optional specific implementations, it may also be pre-specified or agreed in advance that the first uplink carrier is the uplink carrier with the highest ranking among the scheduled uplink carriers or the uplink carrier with the lowest ranking among the scheduled uplink carriers, or the first uplink carrier is the uplink carrier with the smallest index among the scheduled uplink carriers or the uplink carrier with the largest index among the scheduled uplink carriers.

[0177] It should be noted that if the first information indicates that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, then the second uplink carrier is the uplink carrier ranked after the first uplink carrier or the uplink carrier with a carrier index larger than the first uplink carrier; if the first information indicates that the first uplink carrier is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, then the second uplink carrier is the uplink carrier ranked before the first uplink carrier or the uplink carrier with a carrier index smaller than the first uplink carrier.

[0178] Optionally, before determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier, the method further includes:

[0179] Second information sent by a network-side device is received, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

[0180] In an embodiment of the present invention, the network side device is configured according to the maximum number of search spaces required for uplink, that is, as many search spaces as there are uplink carrier groups, even though some uplink carriers in the uplink carrier groups may not be scheduled during actual scheduling.

[0181] In addition, if the non-SUL carriers are not grouped together with the SUL carriers, in addition to configuring an equal number of search spaces for the uplink carrier group, a normal search space also needs to be configured for the non-SUL.

[0182] In one optional specific implementation manner, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0183] That is, in the embodiment of the present invention, there is a one-to-one correspondence between uplink carrier groups and search spaces, and the correspondence is configured by a network-side device.

[0184] Of course, in other optional specific implementations, the above-mentioned corresponding relationship may also be agreed upon or pre-specified by the network-side device and the terminal.

[0185] In another optional specific implementation manner, the method further comprises:

[0186] Third information sent by the network-side device is received, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0187] In this embodiment of the present invention, the correspondence between the uplink carrier group and the search space is not fixed, but varies depending on the uplink carrier actually scheduled by the network-side device. For example, it can be determined based on the uplink carrier scheduled by the PDCCH detected in the search space of the downlink control channel that schedules the downlink carrier. For details, please refer to the above and will not be repeated here.

[0188] Of course, the terminal may also obtain the search space corresponding to the uplink carrier group in other ways. The search space is determined according to the uplink carrier actually scheduled by the network side device, such as a prior agreement or relevant regulations with the network side device.

[0189] Optionally, the method further includes:

[0190] receiving fourth information sent by the network-side device, where the fourth information is used to indicate at least one of the following:

[0191] Information on the order or index of uplink carriers to be scheduled;

[0192] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0193] The number of uplink carriers in each of the uplink carrier groups.

[0194] In an embodiment of the present invention, the network-side device can clearly indicate to the terminal which uplink carrier belongs to which uplink carrier group, or which uplink carriers belong to which uplink carrier group. The network-side device can also indicate the sorting information of the uplink carriers to be scheduled, for example, sorting according to the size of the uplink carrier index number, and indicate to the terminal the number of uplink carriers in each uplink carrier group, so that the terminal can determine which uplink carrier belongs to which uplink carrier group, or which uplink carriers belong to which uplink carrier group, based on the sorting information of the uplink carriers to be scheduled and the number of uplink carriers in each of the uplink carrier groups. Of course, those skilled in the art should understand that if the total number of uplink carriers to be scheduled cannot be divided evenly by the number of uplink carriers in each of the uplink carrier groups, then the number of uplink carriers in the last uplink carrier group can be allowed to be smaller than the number of uplink carriers in other uplink carrier groups.

[0195] See also Figure 2 , Figure 2 1 is a flow chart of a search space configuration method provided in Embodiment 2 of the present invention. The method is applied to a network-side device and includes the following steps:

[0196] Step 21: Send second information to the terminal, where the second information is used to configure N search spaces of downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0197] It should be noted that the number of uplink carriers in each uplink carrier group may be equal or unequal.

[0198] For example, all uplink carriers to be scheduled can be divided into multiple uplink carrier groups. An uplink carrier group can include multiple uplink carriers to be scheduled. Of course, each uplink carrier group is not limited to include multiple uplink carriers to be scheduled. Some uplink carrier groups may include only one uplink carrier. The uplink carriers in an uplink carrier group share a search space.

[0199] That is, in the embodiment of the present invention, the network-side device may configure the same search space for more than one uplink carrier, or configure search spaces for different uplink carrier groups.

[0200] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0201] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0202] Optionally, the method further includes:

[0203] Third information is sent to the terminal, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0204] In the embodiment of the present invention, the network side device configures a search space corresponding to the number of uplink carrier groups for the uplink carrier, but the correspondence between the search space and the uplink carrier is not fixed, and depends on the result of detecting the downlink control channel format corresponding to the uplink scheduling in the same search space as the downlink carrier or in the search space determined according to formula (3).

[0205] Optionally, the method further includes:

[0206] Sending fourth information to the terminal, where the fourth information is used to indicate at least one of the following:

[0207] Information on the order or index of uplink carriers to be scheduled;

[0208] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0209] The number of uplink carriers in each of the uplink carrier groups.

[0210] Optionally, the method further includes:

[0211] Sending first information to the terminal, the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is the search space of the downlink control channel that schedules the downlink carrier or the search space determined according to preset parameters.

[0212] The embodiment of the present invention provides a technical solution corresponding to the above-mentioned embodiment 1, having the same inventive concept, and can achieve the same technical effect. For details, please refer to the above-mentioned embodiment 1, which will not be repeated here.

[0213] See also Figure 3 , Figure 3 FIG. 3 is a schematic diagram of the structure of a terminal provided in Embodiment 3 of the present invention. The terminal 30 includes:

[0214] The search space determination module 31 is configured to determine the search space for the downlink control channel that schedules the uplink carrier according to the uplink carrier group to which the uplink carrier belongs; wherein,

[0215] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0216] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0217] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0218] Optionally, the uplink carrier group corresponds one-to-one to the search space of the downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0219] Optionally, the search space determination module 31 includes:

[0220] A determination unit is used to determine the search space of the downlink control channel for scheduling the second uplink carrier based on the group number of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is the uplink carrier indicated in the downlink control channel detected in the first search space, and the first search space is the search space of the downlink control channel for scheduling the downlink carrier or the search space determined according to preset parameters.

[0221] Optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or,

[0222] The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

[0223] Optionally, the terminal 30 further includes:

[0224] A scheduling indication receiving module is used to receive first information sent by a network-side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

[0225] Optionally, the terminal 30 further includes:

[0226] The configuration information receiving module is used to receive second information sent by a network side device, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

[0227] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0228] Optionally, the terminal 30 further includes:

[0229] The corresponding relationship indication receiving module is used to receive third information sent by the network side device, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0230] Optionally, the terminal 30 further includes:

[0231] A packet information receiving module, configured to receive fourth information sent by a network-side device, wherein the fourth information is used to indicate at least one of the following:

[0232] Information on the order or index of uplink carriers to be scheduled;

[0233] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0234] The number of uplink carriers in each of the uplink carrier groups.

[0235] The embodiment of the present invention is a product embodiment corresponding to the above-mentioned method embodiment 1, so it will not be described in detail here. Please refer to the above-mentioned embodiment 1 for details.

[0236] See also Figure 4 , Figure 4 FIG. 4 is a schematic diagram of the structure of a network-side device provided in a fourth embodiment of the present invention. The network-side device 40 includes:

[0237] The search space configuration module 41 is used to send second information to the terminal, where the second information is used to configure search spaces of downlink control channels of N scheduled uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0238] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0239] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0240] Optionally, the network-side device 40 further includes:

[0241] The corresponding relationship indication module is configured to send third information to the terminal, where the third information is configured to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0242] Optionally, the network-side device 40 further includes:

[0243] a group information sending module, configured to send fourth information to the terminal, wherein the fourth information is used to indicate at least one of the following;

[0244] Information on the order or index of uplink carriers to be scheduled;

[0245] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0246] The number of uplink carriers in each of the uplink carrier groups.

[0247] Optionally, the network-side device 40 further includes:

[0248] A scheduling indication sending module is used to send first information to the terminal, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, and the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is a search space of a downlink control channel for scheduling downlink carriers or a search space determined according to preset parameters.

[0249] This embodiment of the present invention is a product embodiment corresponding to the above-mentioned method embodiment 2, so it will not be described in detail here. Please refer to the above-mentioned embodiment 2 for details.

[0250] See also Figure 5 , Figure 5 1 is a schematic diagram of the structure of a terminal provided by Embodiment 5 of the present invention. The terminal 50 includes: a transceiver 51 and a processor 52;

[0251] The processor 52 is configured to determine a search space for a downlink control channel that schedules the uplink carrier according to the uplink carrier group to which the uplink carrier belongs; wherein,

[0252] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0253] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0254] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0255] Optionally, the uplink carrier group corresponds one-to-one to the search space of the downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0256] Optionally, the processor 52 is used to determine the search space of the downlink control channel for scheduling the second uplink carrier based on the group number of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is the uplink carrier indicated in the downlink control channel detected in the first search space, and the first search space is the search space of the downlink control channel for scheduling the downlink carrier or the search space determined according to preset parameters.

[0257] Optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or,

[0258] The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

[0259] Optionally, the transceiver 51 is used to receive first information sent by a network side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

[0260] Optionally, the transceiver 51 is configured to receive second information sent by a network-side device, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

[0261] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0262] Optionally, the transceiver 51 is configured to receive third information sent by the network-side device, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to a scheduled uplink carrier.

[0263] Optionally, the transceiver 51 is configured to receive fourth information sent by a network-side device, where the fourth information is used to indicate at least one of the following:

[0264] Information on the order or index of uplink carriers to be scheduled;

[0265] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0266] The number of uplink carriers in each of the uplink carrier groups.

[0267] The embodiment of the present invention is a product embodiment corresponding to the above-mentioned method embodiment 1, so it will not be described in detail here. Please refer to the above-mentioned embodiment 1 for details.

[0268] See also Figure 6 , Figure 6 6 is a structural diagram of a network side device provided by embodiment 6 of the present invention. The network side device 60 includes: a transceiver 61 and a processor 62;

[0269] The transceiver 61 is used to send second information to the terminal, where the second information is used to configure search spaces of N downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0270] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0271] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0272] Optionally, the transceiver 61 is further configured to send third information to the terminal, where the third information is configured to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to a scheduled uplink carrier.

[0273] Optionally, the transceiver 61 is further configured to send fourth information to the terminal, where the fourth information is configured to indicate at least one of the following:

[0274] Information on the order or index of uplink carriers to be scheduled;

[0275] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0276] The number of uplink carriers in each of the uplink carrier groups.

[0277] Optionally, the transceiver 61 is also used to send first information to the terminal, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, and the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is the search space of the downlink control channel that schedules the downlink carrier or a search space determined according to preset parameters.

[0278] This embodiment of the present invention is a product embodiment corresponding to the above-mentioned method embodiment 2, so it will not be described in detail here. Please refer to the above-mentioned embodiment 2 for details.

[0279] See also Figure 7 , Figure 7 7 is a schematic diagram of the structure of a terminal provided in Embodiment 7 of the present invention. The terminal 70 includes a processor 71, a memory 72, and a program stored in the memory 72 and executable on the processor 71. When the processor 71 executes the program, the following steps are implemented:

[0280] The search space for the downlink control channel that schedules the uplink carrier is determined according to the uplink carrier group to which the uplink carrier belongs; wherein,

[0281] The uplink carrier group is a grouping of uplink carriers to be scheduled.

[0282] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0283] Optionally, the uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

[0284] Optionally, the uplink carrier group corresponds one-to-one to the search space of the downlink control channel that schedules the uplink carrier in the uplink carrier group.

[0285] Optionally, the processor 71 may further implement the following steps when executing the program:

[0286] The determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier includes:

[0287] Performing detection in a first search space; wherein the first search space is a search space of a downlink control channel of a scheduled downlink carrier or a search space determined according to preset parameters;

[0288] Determine a search space for a downlink control channel that schedules the second uplink carrier based on a group number of an uplink carrier group to which the first uplink carrier belongs and a group number of an uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is an uplink carrier indicated in a downlink control channel detected in a first search space, and the first search space is a search space for a downlink control channel that schedules a downlink carrier or a search space determined based on preset parameters.

[0289] Optionally, the second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or,

[0290] The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

[0291] Optionally, the processor 71 may further implement the following steps when executing the program:

[0292] Before determining the search space for the downlink control channel for scheduling the uplink carrier according to the uplink carrier group to which the uplink carrier belongs, the method further includes:

[0293] Receive first information sent by a network-side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

[0294] Optionally, the processor 71 may further implement the following steps when executing the program:

[0295] Before determining the search space for the downlink control channel for scheduling the uplink carrier according to the uplink carrier group to which the uplink carrier belongs, the method further includes:

[0296] Second information sent by a network-side device is received, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

[0297] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0298] Optionally, the processor 71 may further implement the following steps when executing the program:

[0299] Third information sent by the network-side device is received, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0300] Optionally, the processor 71 may further implement the following steps when executing the program:

[0301] receiving fourth information sent by the network-side device, where the fourth information is used to indicate at least one of the following:

[0302] Information on the order or index of uplink carriers to be scheduled;

[0303] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0304] The number of uplink carriers in each of the uplink carrier groups.

[0305] The specific working process of the embodiment of the present invention is consistent with that of the above-mentioned method embodiment 1, so it will not be repeated here. For details, please refer to the description of the method steps in the above-mentioned embodiment 1.

[0306] See also Figure 8 , Figure 8 8 is a schematic diagram of the structure of a network-side device provided in Embodiment 8 of the present invention. The network-side device 80 includes a processor 81, a memory 82, and a program stored in the memory 82 and executable on the processor 81. When the processor 81 executes the program, the following steps are implemented:

[0307] Second information is sent to the terminal, where the second information is used to configure N search spaces of downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1.

[0308] In this embodiment of the present invention, uplink carriers are divided into multiple groups. The uplink carriers within an uplink carrier group share a common search space. At least some uplink carrier groups include multiple uplink carriers. This reduces the probability of downlink control channel collisions when scheduling multiple uplink carriers for uplink transmission, thereby enabling normal scheduling of the uplink carriers. Furthermore, compared to a solution that configures a search space for each uplink carrier, grouping reduces the number of search spaces, lowering the energy consumption of control channel detection by terminals and reducing the complexity of terminal detection.

[0309] Optionally, the second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

[0310] Optionally, the processor 81 may further implement the following steps when executing the program:

[0311] Third information is sent to the terminal, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

[0312] Optionally, the processor 81 may further implement the following steps when executing the program:

[0313] Sending fourth information to the terminal, where the fourth information is used to indicate at least one of the following:

[0314] Information on the order or index of uplink carriers to be scheduled;

[0315] Information about the uplink carrier group to which the uplink carrier to be scheduled belongs;

[0316] The number of uplink carriers in each of the uplink carrier groups.

[0317] Optionally, the processor 81 may further implement the following steps when executing the program:

[0318] Sending first information to the terminal, the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is the search space of the downlink control channel that schedules the downlink carrier or the search space determined according to preset parameters.

[0319] The specific working process of the embodiment of the present invention is consistent with that of the above-mentioned method embodiment 2, so it will not be repeated here. Please refer to the description of the method steps in the above-mentioned embodiment 2 for details.

[0320] Embodiment 9 of the present invention provides a readable storage medium having a program stored thereon. When executed by a processor, the program implements the steps of any one of the search space determination methods in Embodiment 1 or the steps of any one of the search space configuration methods in Embodiment 2. For details, please refer to the description of the method steps in the corresponding embodiments above.

[0321] The network side device in the embodiment of the present invention can be a base station (Base Transceiver Station, BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), or a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a base station in a future 5G network, etc., and is not limited here.

[0322] The terminals in the embodiments of the present invention can be either wireless or wired terminals. A wireless terminal can be a device that provides voice and / or other service data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. A wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN). A wireless terminal can be a mobile terminal, such as a mobile phone (also known as a "cellular" phone) or a computer with a mobile terminal. For example, a wireless terminal can be a portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless terminal may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, access terminal, user terminal, user agent, user device or user equipment, without limitation herein.

[0323] The above-mentioned readable storage media include computer-readable storage media. Computer-readable storage media include permanent and non-permanent, removable and non-removable media that can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0324] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A search space determination method, applied to a terminal, characterized in that: include: The search space for the downlink control channel that schedules the uplink carrier is determined according to the uplink carrier group to which the uplink carrier belongs; wherein, The uplink carrier group is a grouping of uplink carriers to be scheduled; Determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier, includes: Determine a search space for a downlink control channel that schedules the second uplink carrier based on a group number of an uplink carrier group to which the first uplink carrier belongs and a group number of an uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is an uplink carrier indicated in a downlink control channel detected in a first search space, and the first search space is a search space for a downlink control channel that schedules a downlink carrier or a search space determined based on preset parameters.

2. The method according to claim 1, characterized in that The uplink carrier includes a supplementary uplink carrier, or the uplink carrier includes a non-supplementary uplink carrier and a supplementary uplink carrier.

3. The method according to claim 1, characterized in that The uplink carrier group corresponds one-to-one to a search space of a downlink control channel that schedules the uplink carriers in the uplink carrier group.

4. The method according to claim 1, wherein The second uplink carrier is an uplink carrier ranked after the first uplink carrier, or the second uplink carrier is an uplink carrier ranked before the first uplink carrier, and the uplink carrier group is obtained by grouping according to the ranking of the uplink carriers; or, The second uplink carrier is an uplink carrier having an index greater than that of the first uplink carrier, or the second uplink carrier is an uplink carrier having an index smaller than that of the first uplink carrier, and the uplink carrier group is obtained by grouping the uplink carriers according to the size of the indexes.

5. The method according to claim 1 or 4, characterized in that Before determining the search space for the downlink control channel for scheduling the uplink carrier according to the uplink carrier group to which the uplink carrier belongs, the method further includes: Receive first information sent by a network-side device, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers.

6. The method according to any one of claims 1 to 4, characterized in that Before determining the search space for the downlink control channel for scheduling the uplink carrier according to the uplink carrier group to which the uplink carrier belongs, the method further includes: Second information sent by a network-side device is received, where the second information is used to configure search spaces of N downlink control channels of the scheduled uplink carriers for the N uplink carrier groups.

7. The method according to claim 6, characterized in that The second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

8. The method according to claim 6, characterized in that Also includes: Third information sent by the network-side device is received, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

9. The method according to any one of claims 1 to 4, characterized in that Also includes: receiving fourth information sent by the network-side device, where the fourth information is used to indicate at least one of the following: Information on the order or index of uplink carriers to be scheduled; Information about the uplink carrier group to which the uplink carrier to be scheduled belongs; The number of uplink carriers in each of the uplink carrier groups.

10. A search space configuration method, applied to a network side device, characterized in that: include: Sending second information to the terminal, where the second information is used to configure N search spaces of downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1; Sending first information to the terminal, the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or is the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, the first uplink carrier is an uplink carrier scheduled by a downlink control channel in a first search space, and the first search space is the search space of the downlink control channel that schedules the downlink carrier or the search space determined according to preset parameters.

11. The method according to claim 10, characterized in that The second information further includes information on a one-to-one correspondence between the N uplink carrier groups and the N search spaces.

12. The method according to claim 10, characterized in that Also includes: Third information is sent to the terminal, where the third information is used to indicate to the terminal that the search space corresponding to the uplink carrier group is determined according to the scheduled uplink carrier.

13. The method according to claim 10, characterized in that Also includes: Sending fourth information to the terminal, where the fourth information is used to indicate at least one of the following: Information on the order or index of uplink carriers to be scheduled; Information about the uplink carrier group to which the uplink carrier to be scheduled belongs; The number of uplink carriers in each of the uplink carrier groups.

14. A terminal, characterized in that: include: The search space determination module is configured to determine the search space for the downlink control channel that schedules the uplink carrier according to the uplink carrier group to which the uplink carrier belongs; wherein, The uplink carrier group is a grouping of uplink carriers to be scheduled; Determining, according to the uplink carrier group to which the uplink carrier belongs, a search space for a downlink control channel for scheduling the uplink carrier, includes: Determine a search space for a downlink control channel that schedules the second uplink carrier based on a group number of an uplink carrier group to which the first uplink carrier belongs and a group number of an uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is an uplink carrier indicated in a downlink control channel detected in a first search space, and the first search space is a search space for a downlink control channel that schedules a downlink carrier or a search space determined based on preset parameters.

15. A network side device, characterized in that: include: A search space configuration module is used to send second information to the terminal, wherein the second information is used to configure search spaces of downlink control channels of N scheduled uplink carriers for N uplink carrier groups; the N uplink carrier groups are groupings of uplink carriers to be scheduled, and N is an integer greater than 1; and first information is sent to the terminal, wherein the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, and the first uplink carrier is an uplink carrier scheduled by the downlink control channel in the first search space, and the first search space is the search space of the downlink control channel of the scheduled downlink carrier or a search space determined according to preset parameters.

16. A terminal, characterized in that: include: transceivers and processors; The processor is configured to determine a search space for a downlink control channel that schedules an uplink carrier according to an uplink carrier group to which the uplink carrier belongs; wherein, The uplink carrier group is a grouping of uplink carriers to be scheduled; the search space for the downlink control channel for scheduling the uplink carrier is determined according to the uplink carrier group to which the uplink carrier belongs, including: determining the search space for the downlink control channel for scheduling the second uplink carrier according to the group number of the uplink carrier group to which the first uplink carrier belongs and the group number of the uplink carrier group to which the second uplink carrier belongs; wherein the first uplink carrier is the uplink carrier indicated in the downlink control channel detected in the first search space, and the first search space is the search space for the downlink control channel of the scheduled downlink carrier or the search space determined according to preset parameters.

17. A network side device, characterized in that: include: transceivers and processors; The transceiver is used to send second information to the terminal, where the second information is used to configure N search spaces of downlink control channels for scheduling uplink carriers for N uplink carrier groups; the N uplink carrier groups are groups of uplink carriers to be scheduled, and N is an integer greater than 1; and first information is sent to the terminal, where the first information is used to indicate that the first uplink carrier is the uplink carrier with the highest ranking or the smallest carrier index among the scheduled uplink carriers, or the uplink carrier with the lowest ranking or the largest carrier index among the scheduled uplink carriers, and the first uplink carrier is an uplink carrier scheduled by the downlink control channel in the first search space, and the first search space is the search space of the downlink control channel for scheduling the downlink carrier or a search space determined according to preset parameters.

18. A terminal comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the steps in the search space determination method according to any one of claims 1 to 9 are implemented.

19. A network-side device comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the steps in the search space configuration method according to any one of claims 10 to 13 are implemented.

20. A readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the program implements the steps of the search space determination method according to any one of claims 1 to 9 or the steps of the search space configuration method according to any one of claims 10 to 13.

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