JP2021166410A - Terminal device, communication method, and integrated circuit - Google Patents

Abstract

To reduce a UE's power consumption, decrease the number of blind decoding and reduce buffer size.SOLUTION: There are provided a wireless communication method, an eNB and a UE. A wireless communication method performed by the eNB comprises transmitting repetitions of control channel(s) in a control region to a first UE in a coverage enhancement level. The control region comprises multiple sub-regions each of which can be used to transmit repetitions of one control channel; possible sub-region(s) allocated from the multiple sub-regions for transmitting one control channel to the first UE in the coverage enhancement level start from the same subframe; and the possible sub-region(s) for the first UE in the specific coverage enhancement level constitute a subset of a set of available sub-regions for the coverage enhancement level in the eNB's perspective.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to terminal devices, communication methods, and integrated circuits.

Machine-Type Communication (MTC) is an important source of income for operators and has great potential from the operator's point of view. Based on market and operator requirements, one of MTC's key requirements is to improve MTC UE coverage.

To extend MTC coverage, almost all physical channels need to be expanded. Time domain iterations are the primary way to improve channel coverage. On the receiver side, the receiver synthesizes all of the channel iterations and decodes the information.

Another requirement for MTC is reduction of power consumption on the UE side. One of the efficient ways to reduce power consumption is to reduce the active time of the UE, in other words, reduce unnecessary blind detection, reception, and transmission by the UE.

In the first aspect of the present disclosure, a control circuit that allocates one or more repetitions of a downlink control channel to one or more sub-regions, and a transmitter that transmits the downlink control channel are provided, and the one or more. Sub-regions can be identified using the maximum number of iterations and information about the one or more sub-regions notified by physical layer signaling, and the one or more sub-regions are at each iteration count less than or equal to the maximum iteration count. Base stations are provided, starting from the same subframe.

In a second aspect of the present disclosure, one or more iterations of the downlink control channel are assigned to one or more sub-regions, the downlink control channel is transmitted, and the one or more sub-regions are the maximum number of iterations and physical. Communication that can be identified using information about the one or more sub-regions notified by layer signaling, the one or more sub-regions starting from the same subframe at each iteration count less than or equal to the maximum iteration count. The method is provided.

In the third aspect of the present disclosure, the process of allocating one or more repetitions of the downlink control channel to one or more sub-regions and the process of transmitting the downlink control channel are controlled, and the one or more subs are controlled. The region can be identified using the maximum number of iterations and information about the one or more subregions notified by physical layer signaling, and the one or more subregions are the same at each iteration count less than or equal to the maximum iteration count. An integrated circuit is provided, starting from the subframe.

According to the present disclosure, it is possible to reduce the power consumption of the UE, reduce the number of blind decodings, and reduce the buffer size.

Since the above description is an outline, simplification, generalization, and omission of details are included as necessary. Other aspects, features, and advantages of the device and / or processing described herein, and / or other subjects, will be apparent in the teachings described herein. The above outline is provided to introduce the selection of various concepts in a simplified form, and is further explained in the section "Forms for Carrying Out the Invention" below. Such an overview is not intended to identify key or essential features of the claimed subject matter, but is intended to be used as an aid in determining the scope of the claimed subject matter. not.

The above-mentioned features and other features relating to the present disclosure will be made more completely apparent by using the accompanying drawings in combination with the following description and the appended claims. The description of the present disclosure is further detailed in light of the fact that such drawings merely depict some of the embodiments according to the present disclosure and thus do not limit the scope of the present disclosure. And, in order to add peculiarity, each attached drawing below is used.

Schematic diagram showing an exemplary control region according to an embodiment of the present disclosure. Schematic diagram showing a flowchart of a wireless communication method executed by eNB according to an embodiment of the present disclosure. Schematic diagram showing a flowchart of a wireless communication method executed by a UE according to an embodiment of the present disclosure. Schematic diagram showing an exemplary allocation of UEs to subregions according to an embodiment of the present disclosure. Schematic diagram showing exemplary control regions and exemplary data channels according to an embodiment of the present disclosure. A block diagram schematically showing an eNB according to an embodiment of the present disclosure. A block diagram schematically showing a UE according to an embodiment of the present disclosure.

In the following detailed description, the attached drawings are referred to, and each drawing constitutes a part thereof. Unless otherwise indicated by context, similar symbols in each drawing indicate similar components. Each aspect of the present disclosure may be adapted, replaced, combined, and designed in a wide variety of configurations, all of which are expressly intended and are likely to form part of the present disclosure. Will be understood by.

As described in the background art section, for MTC, an efficient way to reduce power consumption on the UE side is to reduce unwanted blind detection, reception, and transmission by the UE. For this purpose, it is possible to define a control area for the MTC and transmit the control channel, as in the example of FIG. 1, where an exemplary control area according to one embodiment of the present disclosure is schematically shown. be. The control area can be transmitted periodically. Therefore, the MTC UE only needs to be activated within the control area to monitor its own control channel and does not have to be active in all subframes. The control area is mapped on a plurality of subframes, and there may be a plurality of subareas (some of which may overlap) within the control area. Each sub-region can be used to transmit a repeat of one control channel, such as a PDCCH (Physical Downlink Control Channel). In the example of FIG. 1, seven sub-regions exist in the control region. Note that the division of the sub-regions in FIG. 1 is merely an example, and the sub-regions may be divided in different ways. In addition, although the illustrated sub-regions are mapped on the logical indexes of consecutive subframes, the mapping of logical indexes to the physical indexes of the subframes may be localized or decentralized.

The present disclosure proposes a solution to the search space of an MTC UE based on the concept of a control area. According to the proposed solution, the UE active time and blind decryption time will be significantly reduced. In this disclosure, MTC may be taken up as an example for explaining the principle of the present disclosure, but the wireless communication method disclosed in the present disclosure is only for MTC if it is wireless communication that repeatedly transmits a control channel. However, it can be applied to different wireless communications such as other communications conforming to the LTE specifications. Therefore, the UE is not limited to the MTC UE, but may be any other UE capable of executing the communication method described in the present disclosure.

In one embodiment of the present disclosure, the wireless communication method 200 performed by the eNB, shown in FIG. 2, is provided. The figure schematically shows a flowchart of a wireless communication method 200 according to an embodiment of the present disclosure. The wireless communication method 200 includes step 201 of transmitting the repetition of the control channel in the control region to a first UE at a certain coverage enhancement (CE) level. In step 201, one or more control channels can be repeatedly transmitted in a control channel such as the control channel shown in FIG. The control region contains a plurality of sub-regions, each of which can be used to transmit a repeat of one control channel. In the exemplary control region shown in FIG. 1, there are seven sub-regions. Several sub-regions may overlap each other. For example, in FIG. 1, sub-region 1, sub-region 5, and sub-region 7 overlap each other. Here, the "coverage enhancement level" refers to the maximum number of repetitions of transmission for a particular channel. Depending on the application scenario, such as channel conditions, there may be several coverage enhancement levels available to the eNB to transmit the control channel. If the eNB selects a low coverage enhancement level to repeatedly transmit the control channel, fewer subframes can be reserved for repeated transmission. In other words, for low coverage enhancement levels, the reserved sub-areas can be reduced. From the perspective of the system (ie, from the perspective of the eNB, or with respect to all possible receiving UEs), the eNB is part of or a portion of multiple sub-regions that belong to the control domain for each coverage enhancement level. It is possible to transmit control channels within one sub-region selected from a set of all available sub-regions. Taking the control channel shown in FIG. 1 as an example, when the coverage enhancement level 1 (here, the lowest level) is seen from the system, the control channel is in subregions 1, 2, 3, or 4. When transmission is possible and coverage enhancement level 2 the control channel is transmittable in subregions 1, 2, 3, 4, 5, or 6, coverage enhancement level 3 (coverage enhancement level) 3 ( For the highest level here), the control channel can transmit in subregions 1, 2, 3, 4, 5, 6, or 7. Table 1 lists the above examples of the allocation of available sub-areas.

In the wireless communication method 200, it is considered to transmit one control channel toward a specific UE at a specific coverage enhancement level from the viewpoint of the UE (that is, for a specific UE). The sub-regions will be selected from a set of sub-regions available at a particular coverage enhancement level as seen by the eNB, and all of these possible sub-regions will start from the same subframe. The term "sub-region" as used herein means that the number of possible sub-regions can be one or more, and if the number of possible sub-regions is plural, those possible sub-regions are the same sub-region. Note that it means starting from the frame. In other words, a possible sub-region for a particular UE at a particular coverage enhancement level is a sub-region that is available at a particular coverage enhancement level for all possible receiving UEs. Make up a subset of the set. In summary, in the wireless communication method 200, the possible sub-regions allocated from the plurality of sub-regions for transmitting one control channel to the first UE in the coverage enhancement level are from the same sub-frame. Starting, the first UE and the possible sub-regions for a particular coverage enhancement level constitute a subset of the set of sub-regions available at the coverage enhancement level as seen by the eNB. That is, the set of available sub-regions is composed of some or all of the plurality of sub-regions belonging to the control region, and from the perspective of the eNB, any sub-region derived from the set of available sub-regions is the coverage extension level ( It becomes available by the eNB to transmit one control channel within the coverage enhancement level.

In the exemplary control region shown in FIG. 1, for example, in the case of a UE with coverage enhancement level 1, a possible sub-region can contain only one sub-region (eg, a sub-region). In the case of a UE with 1 or sub-regions 2, 3, or 4), coverage enhancement level 2, the possible sub-regions may include two sub-regions (eg, sub-region 1 and sub-regions 1 and sub-regions). In the case of a UE in region 5, or sub-region 3 and sub-region 6), coverage enhancement level 3, the possible sub-regions may include three sub-regions (eg, sub-region 1, sub-region 1, sub-region). Region 5 and sub-region 7). From FIG. 1, it can be seen that for each coverage enhancement level, the possible sub-regions start from the same subframe. For example, if the coverage extension level is 2, sub-region 1 and sub-region 5 start from the same subframe, and if the coverage extension level is 3, sub-region 1 and sub-region 1 and sub-region 5 are started from the same subframe. Region 5 and sub-region 7 start from the same subframe. In other words, for each coverage enhancement level, there are various alternatives to the subset of sub-regions for transmitting control channels from the eNB's perspective, at a certain coverage enhancement level. Each UE monitors one of the alternative subsets listed in Table 2 for the exemplary control area of FIG.

On the UE side, the UE within the coverage enhancement level monitors the control channel because the possible subframes used by the eNB to send control channel iterations to a particular UE start at the same subframe. The possible sub-regions needed to do so also start at the same subframe. In other words, the UE does not have to monitor all control regions for the control channel, only specific sub-regions starting from the same subframe. Therefore, one embodiment of the present disclosure provides a wireless communication method 300 executed by a UE (first UE), as shown in FIG. The figure schematically shows a flowchart of a wireless communication method 300 according to an embodiment of the present disclosure. The wireless communication method 300 includes step 301 of receiving the repetition of the control channel transmitted from the eNB in the control area to the UE of a coverage enhancement level. At this time, the control region includes a plurality of sub-regions, each of which can be used to transmit one control channel iteration, and the UEs in the coverage enhancement level are in one control region. The possible sub-regions required to monitor one control channel start at the same subframe, and the possible sub-regions for the UE at a particular coverage enhancement level are the coverage expansion levels (eNB's perspective). It constitutes a subset of the set of subframes available in coverage enhancement level). It should be noted that the above description of the method 200 also applies to the method 300 and will not be described in detail.

According to the above-mentioned wireless communication method provided by the embodiment of the present disclosure, a plurality of advantages can be obtained. First, it is possible to reduce the power consumption of the UE. The UE does not have to monitor all control areas for its own control channel and is active only during repeated transmit times. Therefore, there is no unnecessary active time with energization. Secondly, it is possible to reduce the number of blind decodings. Taking the control regions shown in FIGS. 1 and 1 according to the present disclosure as an example, it is sufficient to perform blind decoding up to three times. However, if one UE monitors all of the subframes in Table 1, the maximum number of blind decodings is seven. Third, all possible subframes that one UE needs for monitoring start from the same subframe, so no extra buffer is needed and one buffer is sufficient. Conversely, for example, if the UE needs to monitor sub-regions 1, 2, 3, 4, 5, and 6, the UE must buffer sub-regions 2 and 5 at the same time, doubling. You need a size buffer.

In an optional embodiment of the present disclosure, the possible sub-regions may be configured by signaling such as physical layer signaling or RRC (Radio Resource Control) signaling. In other words, which alternative subset of subframes is used for the UE can be configured by signaling, after which the UE has information about which subframes to monitor.

Alternatively, the possible sub-regions may be implicitly indicated by the UE index of the receiving UE (first UE). The UE index can be RNTI (Radio Network Temporary Identifier) or any other index that identifies the UE. For example, a UE can monitor an alternative subset with an index of _{mod (n idx} , n _{L ) + 1 for coverage enhancement level L, where ni dx} is the UE index, n _L is the number of alternative subsets for coverage enhancement level L. For example, a UE with index # 30 monitors an alternative subset (Alt.3 in Table 2, ie subregion 3) with an index of mod (30,4) + 1 for coverage enhancement level 1. be able to. Similarly, at coverage enhancement level 2, the UE at index # 30 is Alt. 1 (ie, subregions 1 and 5) can be monitored, and at coverage enhancement level 3, the UE at index # 30 is Alt. 1 (ie, subregions 1, 5, and 7) can be monitored. According to the embodiment, no additional signaling is required.

Further, in one embodiment of the present disclosure, the first UE is of at least one second UE in addition to the UE index of the first UE in a possible sub-region of the first UE in one control region. The UE index can be monitored and the UE index of the first UE and the UE index of at least one second UE can be used to indicate information about the control channel transmitted to the first UE. A possible sub-region monitored by at least one second UE has a different starting subframe than a possible sub-region monitored by the first UE. According to the embodiment, an alternative subset (first alternative subset) for one UE (eg, first UE) is an alternative subset (second alternative subset) for another UE (second UE). ), And both of these UE indexes of at least two UEs have information about the control channel sent to the first UE in the possible subspace for the first UE (eg, control). Enabled by the eNB to indicate the type of information (such as DCI). Here, the first UE is its own UE index (first UE index), and the UE of the second UE in the first alternate subset of the subregion allocated to the first UE within the CE level. Monitor the index (second UE index). If the first UE finds control information within a subregion that would otherwise consider it to be scrambled by the first UE index, then that control information is for the first UE. This is type 1 control information. If the first UE finds control information within a subregion that would otherwise consider it to be scrambled by the second UE index, then that control information is for the first UE. , Type 2 control information different from type 1. In the conventional method, the control information scrambled by the second UE index is not for the first UE, and the first UE does not decode it. However, in the example of the present disclosure, since the starting subframe of the first alternative subset is different from the starting subframe of the second alternative subset, the control channel transmitted within the first alternative subset is the second. The second UE does not monitor the control channel within the first alternative subset of subframes. Therefore, the second UE index can be reused within the first alternative subset for the first UE to provide information about the control channel being transmitted to the first UE. By using this embodiment, the UE can monitor a plurality of types of control information without adding a new index (for example, RNTI). This can be a means of saving RNTI resources.

As a specific example of the above embodiment, in the case of a specific coverage enhancement level L (for example, level 1 in the examples of FIGS. 1 and 2), the UEs are M (for example, 4) that do not overlap each other. Is assigned to a sub-area of. FIG. 4 is a diagram schematically showing two examples of a method of allocating a UE to a sub-region. In this example, a UE monitors only certain sub-regions, which in order to obtain its own control information (eg DCI), not only its own RNTI, but also other M-. It also monitors some of the other UE's RNTIs assigned to one subregion. Different RNTIs represent different control information type indexes. Table 3 shows an example of control information type indication by RNTI with different monitoring subregions, taking the allocation 2 shown in FIG. 4 as an example.

As can be seen from Table 3, for example, the UE of RNTI # 0 will monitor RNTI # 0, # 1, # 2, and # 3 in subregion 1. If the control channel is successfully decoded by RNTI # 0, the control channel will be a type 1 DCI, and if the control channel is successfully decoded by RNTI # 1, the control channel will be a type 2 DCI, and so on. The same is true. Therefore, the UE can monitor a plurality of types of control information without adding a new RNTI, which saves RNTI resources.

In addition, in another embodiment of the present disclosure, the method 200 may further include transmitting a repeat of a data channel within a sub-region of a data region to a first UE, the method described above. The 300 may further include receiving repeats of the data channel transmitted from the eNB in a sub-region of a data region. The sub-region for the data channel becomes associated with the sub-region for the control channel that schedules the data channel, or information about the sub-region for the data channel is signaled within the control channel that schedules the data channel. You can. The data channel is scheduled by the control channel.

FIG. 5 is a diagram schematically showing a control area and a data area according to an embodiment of the present disclosure. In FIG. 5, the subregion divisions in the control channel and the data channel are the same, but the present disclosure is not so limited. The division of sub-regions in the data channel may differ from that in the control channel. Hereinafter, some specific examples of the same embodiment will be described.

In the first example, the sub-region of the transmitted control channel (eg, PDCCH) and the sub-region of the transmitted data channel scheduled by the control channel are mapped one-to-one. One specific example is illustrated in Table 4 below.

From Table 4, when the UE succeeds in decoding its own control channel in sub-region 1 of the control region, the iteration of the UE's scheduled data channel is transmitted in sub-region 1 within the data region, which the UE does. It can be seen that when the control channel itself is successfully decoded in the sub-region 2 of the control region, the repetition of the scheduled data channel of the UE is transmitted in the sub-region 2 in the data region, and so on.

Alternatively, in the second example, there is a correspondence between the possible monitored sub-regions of the control channel and the monitored sub-regions of the data channel scheduled by that control channel. One specific example is shown in Table 5 below.

From Table 5, when a CE level 1 UE is configured to monitor sub-region 1 in the control region, the scheduled data channel of that UE will be transmitted in sub-region 1 in the data region. When a CE level 2 UE is configured to monitor sub-region 1 and sub-region 5 (Alt.1) in the control region, the scheduled data channel of that UE is sub-region 1 or sub-region 1 in the data region. It can be seen that blind detection is possible as to which sub-region is actually used, which may be transmitted in 5.

Alternatively, in the third example, information about the sub-region for the data channel may be signaled within the control channel that schedules the data channel. For example, in the exemplary control and data regions shown in FIG. 5, the UE uses the control channel to signal information about a particular subregion for the data channel, ie, of the seven subregions. It is possible to signal which sub-region is used to transmit the data channel. Alternatively, the correspondence shown in Table 5 can be used in conjunction with signaling to indicate which subregion is used for the data channel. Specifically, when a CE level 1 UE is configured to monitor sub-regions 1, 2, 3, or 4 in the control region, the scheduled data channels of that UE are each in the data region. Will be transmitted in sub-regions 1, 2, 3, or 4. When a CE level 2 UE is configured to monitor sub-region 1 and sub-region 5 (Alt. 1) in the control region, the scheduled data channel of that UE is sub-region 1 or sub-region 1 in the data region. It may be transmitted in 5, and which sub-region of sub-regions 1 and 5 is actually used is signaled in the scheduling control channel. In the case of a CE level 3 UE, which of the sub-regions 1, 5, and 7 is actually used is signaled in the scheduling control channel. The above example is shown in Table 6.

As yet another example, if a CE level 1 UE is configured to monitor any of subregions 1, 2, 3, and 4 within the control region, the UE's scheduled data channel is data. It may be transmitted in any of the sub-regions 1, 2, 3, and 4 in the region, and which of the sub-regions 1, 2, 3, and 4 is actually used is determined by the scheduling control channel. Is signaled at.

In the above embodiment, which is the repetitive transmission of the data channel associated with the control channel, it is possible to show at least a partial subregion of the data channel, thus reducing the power consumption of the UE and blind decoding used. The number of times can be reduced and the buffer size used can be reduced. In addition, in these embodiments, the sub-region for the data channel can be associated with the sub-region for the control channel that schedules the data channel, thus reducing the signaling overhead of the data channel. It also has the advantage of facilitating scheduling.

The disclosure also provides eNBs and UEs for performing the methods described above. According to one embodiment of the present disclosure, the eNB 600 for wireless communication shown in FIG. 6 is provided. FIG. 6 is a block diagram schematically showing an eNB 600 according to an embodiment of the present disclosure. The eNB 600 may include a transmission unit 601 configured to transmit repeats of control channels within the control region to a first UE at a coverage enhancement level. At this time, the control region includes a plurality of sub-regions, each of which can be used to transmit one control channel iteration, and one control channel is the first in the coverage enhancement level. Possible sub-areas allocated from multiple sub-areas to send to the UE start from the same subframe, and possible sub-areas for the first UE at a particular coverage enhancement level from the eNB. Look at it constitutes a subset of the set of subframes available at the coverage enhancement level. It should be noted that the above description and specific embodiments of Method 200 are also applicable to the eNB 600. For example, the transmit unit 601 may be further configured to transmit data channel iterations within sub-regions of the data region to the first UE.

The eNB 600 according to the present disclosure includes a CPU (Central Processing Unit) 610 for processing various data and executing a related program for controlling the operation of each unit in the eNB 600, and various processes and controls by the CPU 610. ROM (Read Only Memory) 613 for storing various programs necessary for executing the CPU 610, for storing intermediate data temporarily generated in various processing and control procedures by the CPU 610. A RAM (Random Access Memory) 615 and / or a storage unit 617 for storing various programs, data, and the like may be optionally included. The transmission unit 601, CPU 610, ROM 613, RAM 615, and / or storage unit 617 and the like are interconnected via data and / or command bus 620, and signals can be transferred between them.

Each of the above units does not limit the scope of this disclosure. According to one implementation of the present disclosure, the function of the transmission unit 601 may be implemented by hardware, and the CPU 610, ROM 613, RAM 615, and / or storage unit 617 may not be required. Alternatively, the function of the transmission unit 601 may be implemented by functional software linked with the CPU 610, ROM 613, RAM 615, and / or storage unit 617 and the like.

One embodiment of the present disclosure provides a UE 700 for wireless communication, as shown in FIG. FIG. 6 is a block diagram schematically showing a UE 700 according to an embodiment of the present disclosure. The UE 700 may include a receive unit 701 configured to receive repeats of the control channel transmitted from the eNB in the control area to a UE at a coverage enhancement level. At this time, the control region includes a plurality of sub-regions, each of which can be used to transmit one control channel iteration, and the UE in the coverage enhancement level is one in the control channel. The possible sub-regions needed to monitor the control channel start at the same subframe, and the possible sub-regions for the UE at a particular coverage enhancement level are the coverage enhancement from the perspective of the eNB. It constitutes a subset of the set of subframes available in level). It should be noted that the above description and specific embodiments of method 300 are also applicable to the UE 700. For example, the receive unit 701 may be further configured to receive repeats of the data channel transmitted from the eNB in the sub-region of the data region.

The UE 700 according to the present disclosure includes a CPU (Central Processing Unit) 710 for processing various data and executing a related program for controlling the operation of each unit in the UE 700, and various processes and controls by the CPU 710. ROM (Read Only Memory) 713 for storing various programs necessary for executing the above, RAM for storing intermediate data temporarily generated in the procedure related to processing and control by the CPU 710 (Read Only Memory) Random Access Memory) 715 and / or a storage unit 717 for storing various programs, data, and the like may be optionally included. The receiving unit 701, CPU 710, ROM 713, RAM 715, and / or storage unit 717 and the like are interconnected via data and / or command bus 720, and signals can be transferred between them.

Each of the above units does not limit the scope of this disclosure. According to one implementation of the present disclosure, the function of the receiving unit 701 may be implemented by hardware, and the CPU 710, ROM 713, RAM 715, and / or the storage unit 717 may not be required. Alternatively, the function of the receiving unit 701 may be implemented by functional software linked with the CPU 710, ROM 713, RAM 715, and / or storage unit 717 and the like.

The present invention can be realized by software, hardware, or software that works with hardware. Each of the functional blocks used in the description of each of the above embodiments can be realized by an LSI which is an integrated circuit. Each functional block may be formed individually as a chip, or one chip may be formed so as to include a part or all of the functional blocks. The LSI here may refer to an IC, a system LSI, a super LSI, or an ultra LSI depending on the difference in the degree of integration. However, the mounting technique of the integrated circuit is not limited to the LSI, and can be realized by using a dedicated circuit or a general-purpose processor. In addition, a field-programmable gate array (FPGA) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connection and settings of circuit cells located inside the LSI can also be used. can. Further, the calculation of each functional block can be executed by using a calculation means such as a DSP or a CPU, and the processing step of each function can be recorded on a recording medium as an execution program. Furthermore, if technology for mounting integrated circuits to replace LSI has emerged with the development of semiconductor technology or other derivative technologies, it is clear that such technology may be used to integrate functional blocks.

The present invention is intended to be modified or modified by one of ordinary skill in the art based on the description presented herein and known techniques without departing from the content and scope of the invention. Please note that the modifications and applications are within the scope of the claims. Further, the components of the above embodiment may be arbitrarily combined as long as the contents of the present invention are not deviated.

Claims (11)

A control circuit that identifies one or more sub-regions to which one or more iterations of the downlink control channel are assigned.
A receiver that receives the downlink control channel in the one or more sub-regions.
The one or more sub-regions are notified by the maximum number of iterations and physical layer signaling, and can be identified using information indicating the sub-region to be used among the candidates for the plurality of sub-regions.
The one or more sub-regions start from the same subframe at each iteration count less than or equal to the maximum iteration count.
Terminal equipment. The number of repetitions of one or more of the downlink control channels is equal to or less than the maximum number of repetitions.
The terminal device according to claim 1. The number of iterations of the data channel is different from the number of iterations of one or more of the downlink control channels.
The terminal device according to claim 1. The same subframe is determined using the UE index, which is an identifier of the communication device.
The terminal device according to claim 1. The maximum number of repetitions is selected from a plurality of maximum number of repetitions.
The terminal device according to claim 1. The base station
Identify one or more sub-regions to which one or more iterations of the downlink control channel are assigned
The downlink control channel is received in the one or more sub-regions, and the downlink control channel is received.
The one or more sub-regions are notified by the maximum number of iterations and physical layer signaling, and can be identified using information indicating the sub-region to be used among the candidates for the plurality of sub-regions.
The one or more sub-regions start from the same subframe at each iteration count less than or equal to the maximum iteration count.
Communication method. The number of repetitions of one or more of the downlink control channels is equal to or less than the maximum number of repetitions.
The communication method according to claim 6. The number of iterations of the data channel is different from the number of iterations of one or more of the downlink control channels.
The communication method according to claim 6. The same subframe is determined using the UE index, which is an identifier of the communication device.
The communication method according to claim 6. The maximum number of repetitions is selected from a plurality of maximum number of repetitions.
The communication method according to claim 6. The process of identifying one or more sub-regions to which one or more iterations of the downlink control channel are assigned, and
Control the process of transmitting the downlink control channel in the one or more sub-regions,
The one or more sub-regions are notified by the maximum number of iterations and physical layer signaling, and can be identified using information indicating the sub-region to be used among the candidates for the plurality of sub-regions.
The one or more sub-regions start from the same subframe at each iteration count less than or equal to the maximum iteration count.
Integrated circuit.

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