WO2021237427A1 - 物理下行控制信道的发送及接收方法、装置及电子设备 - Google Patents

物理下行控制信道的发送及接收方法、装置及电子设备 Download PDF

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Publication number
WO2021237427A1
WO2021237427A1 PCT/CN2020/092183 CN2020092183W WO2021237427A1 WO 2021237427 A1 WO2021237427 A1 WO 2021237427A1 CN 2020092183 W CN2020092183 W CN 2020092183W WO 2021237427 A1 WO2021237427 A1 WO 2021237427A1
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pdcch
search space
candidate
transmission
sending
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PCT/CN2020/092183
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English (en)
French (fr)
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牟勤
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北京小米移动软件有限公司
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Priority to CN202080000980.9A priority Critical patent/CN111758238B/zh
Priority to PCT/CN2020/092183 priority patent/WO2021237427A1/zh
Priority to US17/927,512 priority patent/US20230247640A1/en
Publication of WO2021237427A1 publication Critical patent/WO2021237427A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/08Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present disclosure relates to the field of communication technology. Specifically, the present disclosure relates to a method, device, and electronic device for sending and receiving a physical downlink control channel (PDCCH, physical downlink control channel).
  • PDCH physical downlink control channel
  • MTC Machine Type Communication
  • NB-IoT Nearband Internet of Things
  • 5G NR-lite Similar to the Internet of Things devices in LTE, 5G NR-lite usually needs to meet the requirements of low cost, low complexity, a certain degree of coverage enhancement, and power saving. However, since the current NR is designed for high-end terminals such as high speed and low delay, the current design cannot meet the above-mentioned requirements of NR-lite. Therefore, the current NR system needs to be modified to meet the requirements of NR-lite.
  • the purpose of the present disclosure is to better meet the communication requirements and at least solve one of the technical defects existing in the prior art.
  • the present disclosure provides a method for sending a physical downlink control channel, the method including:
  • the candidate search space used to repeatedly transmit the PDCCH is all search spaces in a time unit or at least one search space ;
  • the PDCCH is sent according to the determined search space.
  • the present disclosure provides a method for receiving a physical downlink control channel, the method including:
  • the PDCCH is blindly detected according to the determined candidate search space used for repeatedly transmitting the PDCCH multiple times; wherein the candidate search space used for repeatedly transmitting the PDCCH multiple times is all search spaces in a time unit or at least one search space.
  • the present disclosure provides a device for sending a physical downlink control channel, the device including:
  • the search space determining module is configured to determine the search space used for transmitting PDCCH from the candidate search space used for multiple repeated transmission of PDCCH; wherein, the candidate search space used for multiple repeated transmission of PDCCH is a unit of time. All search spaces or at least one search space;
  • the PDCCH sending module is configured to send the PDCCH according to the determined search space.
  • the present disclosure provides an apparatus for receiving a physical downlink control channel, the apparatus including:
  • the PDCCH blind detection module is configured to determine a candidate search space for multiple repeated transmissions of the PDCCH, and blindly detect the PDCCH according to the determined candidate search space for multiple repeated transmissions of the PDCCH;
  • the candidate search space used to repeatedly transmit the PDCCH for multiple times is all search spaces in one time unit or at least one search space.
  • the present disclosure also provides an electronic device, which includes a memory and a processor;
  • a computer program is stored in the memory
  • the processor is used to execute the sending method or the receiving method of the physical downlink control channel provided by the present disclosure when the computer program is running.
  • the present disclosure also provides a computer-readable storage medium in which a computer program is stored.
  • the computer program is run by a processor, the computer program is used in the method for sending or receiving the physical downlink control channel provided by the present disclosure.
  • Figure 1a is a schematic diagram of a distributed configuration search space
  • Figure 1b is a schematic diagram of a search space with a centralized configuration
  • Fig. 2 is a schematic diagram of a search space configuration method provided in an example of the present disclosure
  • FIG. 3 is a schematic diagram of a corresponding relationship between the number of transmissions and the search space provided in an example of the present disclosure
  • 4a and 4b are schematic diagrams of the correspondence between two types of transmission times and search space configuration parameters provided in an example of the present disclosure
  • FIG. 5 is a schematic flowchart of a method for sending a physical downlink control channel provided by the present disclosure
  • FIG. 6 is a schematic structural diagram of a device for sending a physical downlink control channel provided by the present disclosure
  • FIG. 7 is a schematic structural diagram of an electronic device provided by the present disclosure.
  • the "user equipment”, “terminal”, and “terminal equipment” used herein include both wireless signal receiver equipment, which only has equipment with wireless signal receivers without transmitting capability, and equipment receiving and transmitting hardware.
  • Such equipment may include: cellular or other communication equipment, which has a single-line display or a multi-line display or a cellular or other communication equipment without a multi-line display; PCS (Personal Communications Service, personal communication system), which can combine voice and data Processing, fax and/or data communication capabilities; PDA (Personal Digital Assistant), which can include radio frequency receivers, pagers, Internet/Intranet access, web browsers, notebooks, calendars and/or GPS (Global Positioning System (Global Positioning System) receiver; a conventional laptop and/or palmtop computer or other device that has and/or includes a radio frequency receiver.
  • PCS Personal Communications Service, personal communication system
  • PDA Personal Digital Assistant
  • terminal can be portable, transportable, installed in vehicles (aviation, sea and/or land), or suitable and/or configured to be locally Operate, and/or in a distributed form, operate at any other location on the earth and/or space.
  • the "terminal”, “terminal device”, and “user equipment” used here can also be communication terminals, internet terminals, music/video playback terminals, such as PDA, MID (Mobile Internet Device, mobile Internet device) and/or Mobile phones with music/video playback functions can also be devices such as smart TVs and set-top boxes.
  • 5G NR-lite usually needs to meet the requirements of low cost, low complexity, a certain degree of coverage enhancement, and power saving.
  • the current NR system is designed for high-end terminals such as high-speed and low-latency, and cannot be applied well or meet the requirements of NR-lite.
  • the current NR system needs to be modified to meet the requirements of NR-lite.
  • the RF (Radio Frequency) bandwidth of NR-IoT can be limited, for example, to 5MHz or 10MHz, or the size of the NR-lite buffer (cache) can be limited, thereby limiting The size of each received transport block and so on.
  • the possible optimization direction is to simplify the communication process and reduce the number of times that NR-lite users detect the downlink control channel.
  • the basic component unit of the PDCCH in the NR system is the REG (resource element group).
  • a REG corresponds to the size of a PRB (physical resource block, physical resource block) in the frequency domain (12 RE (resource element, resource element) ), corresponds to the size of an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbol in the time domain. 6 REGs will form a CCE (control channel element, control channel element).
  • a PDCCH can be composed of 1, 2, 4, 8, 16 CCEs, and the number of CCEs contained in a PDCCH can be called the aggregation level or aggregation level (aggregation level, AL).
  • the degree of aggregation is mainly determined by the channel conditions.
  • the CCE numbers in the configured control resource set are, for example, CCE#0 ⁇ CCE#3, CCE#4 ⁇ CCE#7.
  • the protocol specifies the maximum number of blind decoding (BD) times for a user (ie, user equipment) under different subcarrier spacing parameters (corresponding to ⁇ in the following table) in a slot (time slot) , As shown in Table 1 below.
  • BD blind decoding
  • Figure 1a and Figure 1b respectively show a schematic diagram of a distributed configuration search space and a centralized configuration search space.
  • the figure shows 4 slots, and the search space shown in Figure 1a can be understood as one The search space corresponding to the search space identifier (searchSpaceId, the ID of the search space collection).
  • searchSpaceId the ID of the search space collection.
  • One searchSpaceId can be configured with one or more search spaces.
  • a slot is configured with a search space corresponding to a searchSpaceId, and a searchSpaceId is configured with Two search spaces (with filled parts in the figure), and in the centralized distribution shown in Figure 1b, a slot can be configured with multiple search spaces corresponding to searchSpaceIds. If you consider centralized transmission, although it can save power, it may exceed the limit on the number of blind checks and the non-overlapping CCE in a slot.
  • the present disclosure provides a physical downlink control channel transmission And receiving method, device and electronic equipment.
  • a search space that can be used to repeatedly transmit PDCCH multiple times can be configured in a slot, that is, a special candidate search space that can be used to repeatedly transmit PDCCH multiple times can be configured in a slot, which can also be called A designated search space or a specific search space, the base station can send PDCCH one or more times in these search spaces.
  • each search space can be agreed or configured
  • the degree of CCE aggregation and/or PDCCH candidate transmission location (Number of PDCCH candidates, also called Number of PDCCH location) supported within are different.
  • the CCE aggregation degree and/or PDCCH candidate transmission position corresponding to the search space for transmitting the PDCCH can be different from the existing ones, by limiting the CCE aggregation degree and/or the search space PDCCH candidate transmission position to avoid or reduce the problem of exceeding the limit of the number of blind checks and non-overlapping CCE in a slot.
  • Figure 2 shows a schematic diagram of the configuration of candidate search spaces in a slot based on the above principles.
  • three candidate search spaces that can be used to repeatedly transmit PDCCH are configured in one slot (in the figure)
  • the repeated search space shown is Repeated SS), that is, the candidate search spaces S1, S2, and S3 shown in the figure.
  • the first candidate search space in this example is that S1 supports CCE AL 4, 8, 16, only CCE AL 16 is supported in the second and third candidate search spaces.
  • the PDCCH candidate transmission location corresponding to each aggregation level that is, the Number of PDCCH location shown in the figure
  • the Number of PDCCH location shown in the figure can also be configured.
  • space S1 corresponds to a mapping relationship between aggregation levels and PDCCH candidate transmission positions in the AL set
  • space S2 and space S3 Corresponding to another mapping relationship between aggregation levels and PDCCH candidate transmission positions in AL aggregation.
  • there are two PDCCH candidate transmission positions corresponding to aggregation level 4 supported by space S1 one PDCCH candidate transmission position corresponding to aggregation level 8 is one, and space S2 and space S3 only support aggregation level 16, and the corresponding PDCCH The candidate transmission position is one.
  • the base station when the base station sends the PDCCH to the NR-lite user equipment, if only one transmission is performed, one of the above three search spaces can be selected, and if two transmissions are performed, the above can be selected Two of the three search spaces are selected, but two transmissions are performed. Since the aggregation levels supported by the space S1 include 4, 8, and 16, while the space S2 and the space S3 only support the aggregation level 16, when the base station sends the PDCCH, The aggregation level corresponding to the selected search space can only be 16.
  • the UE receives the PDCCH sent by the base station, that is, when performing blind PDCCH detection, it can perform corresponding blind detection based on the above configuration in the above three search spaces.
  • the above configuration information may be instructed by the base station to the user equipment. It can also be agreed upon in an agreement.
  • candidate search spaces with different configurations that can be used to repeatedly transmit the same PDCCH may be the same search space (that is, the search space IDs are the same, which can be understood as belonging to the same search space set), It can also be a different search space (the search space ID is different).
  • two or more patterns (patterns) of the candidate transmission positions of the AL and the PDCCH may be configured, that is, the foregoing mapping relationship. For example, in the above example shown in Figure 2, two different patterns are configured.
  • the base station can configure it or set it according to preset rules, that is, the base station can report to the UE The indication information of which pattern to use is issued, or the base station and UE can determine which pattern to use according to a pre-agreed rule, for example, pattern1 is used in the first search space in a slot, and pattern2 is used in the remaining search spaces.
  • the base station can configure it, or the base station and UE can preset which search space or search spaces can be used for multiple repeated transmissions of the same PDCCH or default to all the candidates configured in this slot
  • the search space can be used for transmission.
  • a UE it can correspond to search spaces under multiple search space IDs.
  • the base station can send indication information to the UE to indicate which candidate or search space IDs correspond to the UE.
  • the search space can be used for multiple repeated transmissions of the same PDCCH.
  • the UE can perform blind PDCCH detection in the candidate search space corresponding to ID1 that can be used for multiple repeated transmissions of the same PDCCH For example, based on the configuration shown in FIG. 2, the UE can perform blind PDCCH detection in the three candidate search spaces corresponding to ID1.
  • the use objects of the candidate search space in a slot can be restricted, that is, a certain candidate search space can only be used for the PDCCH with a specific number of repeated transmissions (that is, the number of repeated transmissions). That is, for the same PDCCH, the search space for transmitting the PDCCH can be determined according to the number of times the PDCCH needs to be transmitted.
  • Figure 3 shows a schematic diagram of a search space configuration based on this principle.
  • a slot is configured with 4 candidate search spaces for repeated transmission (that is, it can be used for multiple repeated transmissions of PDCCH Search space).
  • the number of repeated transmissions is 2, then it can be restricted to only repeat transmission in the first candidate search space and the second candidate search space shown in the figure, of course, it can also be restricted to the first one.
  • the candidate search space and the third candidate search space are repeatedly sent. If the number of repeated transmissions is 4, then the PDCCH is repeatedly transmitted in the four candidate search spaces.
  • the first, second, and other description methods are only for ease of description, and are used to distinguish different search spaces, not the absolute order of search spaces.
  • which is the first and which is the second configuration or agreement method is not limited in this disclosure.
  • the set of repeated transmission times corresponding to each candidate search space may be different.
  • the base station can determine the search space to be used according to the number of repeated transmissions required.
  • the set of repeated transmission times corresponding to the first candidate search space can be configured as ⁇ 1,2,3 ,4 ⁇
  • the set of repeated transmission times corresponding to the second candidate search space is ⁇ 2,3,4 ⁇
  • the set of repeated transmission times corresponding to the third candidate search space is ⁇ 3,4 ⁇
  • the fourth candidate search space The corresponding set of repeated transmission times is ⁇ 4 ⁇ .
  • the search space used is the first candidate search space, and if the number of PDCCH transmissions is 2, the search space used is the first A candidate search space and a second candidate search space.
  • different PDCCH repetitive transmission times may correspond to different CCE aggregation levels and/or different PDCCH candidate transmission positions. That is to say, the corresponding relationship between the CCE aggregation level and/or different PDCCH candidate transmission positions corresponding to the candidate search space and the number of repeated PDCCH transmissions can be limited to avoid or reduce the number of blind checks and non-exceeding checks in a slot. -overlapping CCE restrictions.
  • different PDCCH repeated transmission times can correspond to different CCE aggregation levels and/or different PDCCH candidate transmission position configurations, which can be for any search space of a slot, and can be used for multiple times if configured. If the candidate search spaces of the PDCCH are repeatedly transmitted, the configuration may be for these candidate search spaces.
  • FIGS. 4a and 4b show schematic diagrams of two search space configuration modes provided by the present disclosure.
  • the configuration mode can also be referred to as a search space pattern.
  • the configuration mode in Figure 4a is search Space pattern1
  • the configuration in Figure 4b is search space pattern2
  • search spaces pattern1 and pattern2 are repeated for different PDCCH transmission times, for example, when the number of repeated transmissions is 1, corresponding to search space pattern1, when the number of repeated transmissions is greater than 1.
  • the search space pattern2 Corresponding to the search space pattern2.
  • the aggregation levels supported by the search space namely AL, include 4, 8, 16, and the PDCCH candidate transmission positions corresponding to each aggregation level are 2, 1, and 1, respectively.
  • the aggregation level supported by search space pattern1 is only 16, and the candidate transmission position corresponding to this aggregation level is 1.
  • the base station when the base station needs to send the PDCCH to the UE, the base station can also send other relevant indication information to the UE so that the UE can perform blind detection of the PDCCH according to the indication information, reducing the complexity of the blind detection of the UE, for example,
  • the base station when the search space can support multiple ALs, the base station can send a piece of configuration information indicating the aggregation level to the UE.
  • the aggregation levels supported by the search space are 4, 8, and 16, the base station It can be instructed that when the UE sends the PDCCH, the aggregation level set corresponding to the search space is ⁇ 4, 8 ⁇ , then the UE can perform blind detection of the PDCCH based on the aggregation level set.
  • FIG. 5 shows a method for sending a physical downlink control channel provided by the present disclosure.
  • the method may be specifically executed by a base station. As shown in FIG. 5, the method may include:
  • Step S110 Determine the search space used to transmit the PDCCH from the search space used to repeatedly transmit the PDCCH for multiple times;
  • the search space used to repeatedly transmit the PDCCH for multiple times is all search spaces within one time unit or at least one search space.
  • Step S120 Send the PDCCH according to the determined search space.
  • the candidate search space used for multiple repeated transmissions of the PDCCH refers to all or part of the search space that can be used for multiple PDCCH transmissions in these search spaces, that is, the search space that can be used for multiple PDCCH transmissions. Part or all.
  • the search space that can be used for multiple PDCCH transmissions can also be used for one PDCCH transmission. That is to say, in step S120, transmitting the PDCCH according to the determined search space may be that the base station transmits the PDCCH once in the determined search space, or the base station repeatedly transmits the PDCCH in the determined search space, that is, the same PDCCH is performed. Send multiple times.
  • the base station determines the search space for transmitting the PDCCH from the candidate search space used for multiple repeated transmissions of the PDCCH, it may be based on the relevant information including but not limited to the UE (such as UE capability information), channel conditions, One or more items of the information including the number of times the PDCCH needs to be sent are determined. For example, if the number of transmissions of the PDCCH is one, the base station can randomly select one from the search space that can be used to repeatedly transmit the PDCCH for sending the PDCCH, and can also choose according to the channel conditions. Large aggregation level search space.
  • the aggregation level set corresponding to the candidate search space may be a subset of the full set of aggregation levels, and /Or, the number of PDCCH candidate transmission positions corresponding to each aggregation level in the aggregation level set is less than or equal to the set number corresponding to the aggregation level.
  • the above-mentioned aggregation level complete set refers to the aggregation level set in the existing NR system, that is, the aggregation level set including 1, 2, 4, 8, and 16.
  • the above-mentioned set number refers to the number of PDCCH candidate transmission positions corresponding to an aggregation level in the existing NR system.
  • the complexity of the UE's blind PDCCH detection by restricting the aggregation levels and/or PDCCH candidate transmission positions supported by the search space that can be used to repeatedly transmit the PDCCH for multiple times.
  • multiple search spaces for repeated transmission of PDCCH within the time unit can be configured, that is, some search spaces can be used for multiple transmissions.
  • the search space of the PDCCH is repeatedly transmitted once, and the aggregation level of these search spaces and/or the PDCCH candidate transmission position can be restricted.
  • the UE when the UE receives the PDCCH sent by the base station, it can perform blind detection of the PDCCH in these search spaces based on the aggregation level corresponding to each search space and/or the configuration information of the PDCCH candidate transmission position.
  • the time granularity of a time unit is not limited in the present disclosure.
  • a time unit may be a slot.
  • the time granularity of a time unit is taken as an example. Be explained. In actual applications, corresponding to different actual application requirements or application scenarios, the time unit may also adopt other time granularities.
  • determining the search space used to transmit the PDCCH from the search space used to repeatedly transmit the PDCCH includes:
  • the search space for sending the PDCCH is determined.
  • the corresponding relationship between the search space that can be used for multiple repeated transmissions of the PDCCH and the number of repeated transmissions of the PDCCH can be restricted.
  • the base station transmits the PDCCH, it can determine which search space or search spaces to use based on the number of transmissions of the PDCCH .
  • the search space used can also be determined according to the number of PDCCH transmissions and the configuration parameters of each search space. For example, different search spaces correspond to different ALs, so when determining the search space, you can determine the search space according to For transmission times and channel conditions, select a corresponding number of search spaces. For example, when the channel conditions are poor, select a search space with a relatively large support level.
  • determining the search space used to send the PDCCH according to the number of times the PDCCH is sent includes:
  • the first mapping relationship includes at least a search space corresponding to the number of times each candidate is sent.
  • the search space sets corresponding to the candidate transmission times of each PDCCH are not completely the same or completely different;
  • the sets of candidate transmission times of the PDCCH corresponding to each candidate search space are not completely the same or completely different.
  • the number of candidate transmissions refers to the number of times the base station may transmit the PDCCH. Assuming that the maximum number of repeated transmissions of a PDCCH is 4, the number of candidate transmissions can be 1, 2, 3 Times or 4 times.
  • the above mapping relationship can be configured for the number of transmissions, each of which corresponds to a different set of search spaces; it can also be configured for search spaces, where each search space corresponds to a different set of transmissions.
  • each search space For example, for the first candidate search space, the set of corresponding transmission times may include 1, 2, 3, and 4. For the second candidate search space, The corresponding set of sending times can include 2, 3, and 4.
  • the method may further include:
  • Sending instruction information where the instruction information is used to indicate the number of times of at least one candidate transmission of the PDCCH.
  • the base station when the base station sends the PDCCH to the UE, the base station can determine how many times to send the PDCCH. Therefore, the base station can send an indication to the UE to inform the UE of at least one candidate sending times, that is, the possible sending. For example, when the base station needs to repeatedly transmit the PDCCH twice, it can inform the UE that the candidate transmission times are 1 and 2. When the UE blindly detects the PDCCH, it can perform PDCCH blind detection based on the indicated candidate transmission times and other configurations. Check.
  • the possible number of transmissions notified by the base station to the UE can be a number or a collection of times, that is, the number of possible transmissions mentioned above can be the number of actual transmissions to be transmitted by the base station, or it can include the actual number of transmissions to be transmitted and other possible transmissions. frequency.
  • the candidate search space used to repeatedly transmit the PDCCH for multiple times includes multiple (including two or more) search spaces, and the multiple search spaces correspond to the same search space identification ID, or multiple search spaces. Part or all of the search spaces in the search space correspond to different search space IDs.
  • these multiple search spaces may correspond to the same search space set, or at least two of the multiple search spaces may respectively correspond to different search spaces.
  • a collection of search spaces For example, taking the three search spaces shown in Figure 2 that can be used to repeatedly transmit PDCCH for multiple times, the spaces S1, S2, and S3 can be three search spaces under the same search space ID, or one of them Two are search spaces under the same search space ID, and the other is a search space under another search space ID. It is also possible that the spaces S1, S2, and S3 respectively correspond to three different search space IDs.
  • the candidate search space used to repeatedly transmit the PDCCH for multiple times includes multiple (two or more) search spaces, and at least two of the multiple candidate search spaces correspond to The first configuration parameters are different, where the first configuration parameters include at least one of the following:
  • the PDCCH candidate transmission position corresponding to each aggregation level in the aggregation level set is the PDCCH candidate transmission position corresponding to each aggregation level in the aggregation level set.
  • part or all of the multiple candidate search spaces used to repeatedly transmit the PDCCH multiple times may be configured to correspond to different aggregation level sets and/or PDCCH candidate transmission positions.
  • the base station when it sends the PDCCH, it can send the PDCCH one or more times according to the determined search space aggregation level set and/or PDCCH candidate transmission position.
  • the UE when the UE performs blind PDCCH detection in at least one candidate search space, it can perform blind detection based on the respective configuration parameters of each candidate search space.
  • the corresponding relationship between different aggregation level sets and PDCCH candidate transmission positions can be configured.
  • the candidate search space S1 corresponds to a mapping relationship between AL and PDCCH candidate transmission positions
  • candidate search spaces S2 and S3 correspond to another mapping relationship between AL and PDCCH candidate transmission positions.
  • the method may further include:
  • the first configuration information is sent, and the first configuration information is used to indicate to the receiving end the search space ID corresponding to the search space used to send the PDCCH.
  • the base station can send configuration information (also called indication information or other names) to inform the UE of which search space ID or candidate search spaces (candidate search spaces that can be used to repeatedly send PDCCH) to perform the same search space ID. Repeated transmission of PDCCH multiple times.
  • configuration information also called indication information or other names
  • this solution may be applicable to the case where multiple candidate search spaces correspond to the same search space ID, and it is also applicable to the case where multiple candidate search spaces correspond to at least two search space IDs.
  • the candidate search space corresponding to which search space ID or search space IDs can be used to transmit multiple repeated transmissions of the same PDCCH or the base station and UE can determine by themselves according to the rules set in the reservation, or it can be set in one by default.
  • Candidate search spaces under all configured search space IDs in the time unit can be used for transmission.
  • the base station may not need to send the above configuration information to the UE. For example, for a UE, it can be agreed that PDCCH transmission will be performed in the search space under the search space ID that meets the preset condition (for example, the ID number is small) among all the search space IDs corresponding to the UE.
  • the method may further include:
  • the second mapping relationship is the corresponding relationship between each number of transmissions and each second configuration parameter, where the second configuration parameter includes at least one of the following parameters:
  • sending the PDCCH according to the determined search space may include:
  • the PDCCH is sent in the determined search space.
  • the base station can determine the configuration parameter corresponding to the search space according to the number of times it needs to send, and perform one or more repeated transmissions of the PDCCH in the determined search space based on the configuration parameter. For example, the corresponding relationship between the two AL sets and PDCCH candidate transmission positions shown in Figures 4a and 4b, when the number of transmissions is 1, the configuration corresponding to the candidate search space used to transmit the PDCCH is the configuration shown in the parameter correspondence 1. Parameter. When the number of transmissions is greater than 1, the configuration parameter corresponding to the candidate search space used to transmit the PDCCH is the configuration parameter shown in correspondence 2.
  • the search space used to repeatedly transmit the PDCCH for multiple times is all search spaces within one time unit or at least one search space.
  • the UE For the UE receiving the PDCCH, because the UE usually does not know which candidate search space or search spaces the base station is using to transmit the PDCCH, the UE usually needs to perform blind PDCCH detection in all possible candidate search spaces. . Similarly, for the present disclosure, for a PDCCH, if the base station performs one or more retransmissions of the PDCCH, the UE needs to perform blind detection of the PDCCH on the candidate search space for multiple repeated transmissions of the PDCCH.
  • determining a candidate search space for repeated transmission of PDCCH for multiple times includes:
  • a candidate search space for transmitting the PDCCH is determined.
  • the candidate search space corresponding to each candidate transmission time may be determined according to the determined candidate transmission times of one or more PDCCHs, so as to perform blind detection of the PDCCH in the determined at least one candidate search space.
  • the corresponding search space set is the first candidate search space, and for candidate transmission times 1, UE only needs to perform blind detection in the first candidate search space;
  • the number of candidate transmissions is 2.
  • the UE needs to perform blind detection in the first and second candidate search spaces.
  • determining the candidate search space for transmitting the PDCCH according to the number of candidate transmissions of the PDCCH includes:
  • the first mapping relationship includes at least a search space corresponding to the number of times each candidate is sent.
  • first mapping relationship reference may be made to the detailed description of the first mapping relationship above, which is not repeated here.
  • the search space sets corresponding to the candidate transmission times of each PDCCH are not completely the same or completely different;
  • the set of candidate transmission times of the PDCCH corresponding to each candidate search space is not completely the same or completely different.
  • the method may further include:
  • the base station can inform the UE of the possible number of repeated transmissions (that is, the number of candidate transmissions) through the indication information.
  • the specific form of the information is not limited in this disclosure.
  • the indication information may be display information, that is, information that directly indicates the number of candidate transmissions, or implicit information.
  • the UE receives the implicit information.
  • the PDCCH transmission times can be determined according to the system agreement or other configuration information.
  • the base station may not send the indication information to the UE, and the UE needs to perform blind detection in a search space corresponding to all possible times.
  • the protocol can stipulate that the maximum number of repeated transmissions is 4, and the base station can inform the UE through the indication information that the number of PDCCH repeated transmissions may be 1 or 2.
  • PDCCH blind detection is performed on all possible search spaces corresponding to times, 3 times, and 4 times.
  • blindly detecting the PDCCH according to the determined candidate search space for repeated transmission of the PDCCH for multiple times includes:
  • the first configuration parameter includes at least one of the following parameters:
  • the PDCCH candidate transmission position corresponding to each aggregation level in the aggregation level set is the PDCCH candidate transmission position corresponding to each aggregation level in the aggregation level set.
  • each candidate search space can correspond to a different aggregation level set, and/or each candidate search space corresponds to a different set of aggregation levels.
  • the UE when it performs blind detection of the PDCCH, it can perform blind detection according to the configuration parameters corresponding to each candidate search space.
  • the space S1 corresponds to a mapping relationship between an aggregation level set and the PDCCH candidate transmission position corresponding to each aggregation level in the set
  • the space S2 and space S3 correspond to another mapping relationship.
  • the UE When the UE performs blind detection of the PDCCH in the space S1, it needs to perform the blind detection according to the mapping relationship corresponding to the space, and when performing the blind detection in the spaces S2 and S3, the mapping relationship corresponding to the two spaces is required to perform the blind detection.
  • the UE can no longer perform blind detection in other candidate search spaces.
  • the UE has Continue the blind inspection. In other words, the UE may perform blind PDCCH detection in each search space, or it may stop the blind PDCCH detection after the PDCCH is retrieved in a certain candidate search space.
  • determining a candidate search space for multiple repeated transmissions of the PDCCH; according to the determined candidate search space for multiple repeated transmissions of the PDCCH, blind detection of the PDCCH may include:
  • the first configuration information is used to indicate a search space ID corresponding to a search space used to send the PDCCH;
  • the configuration information can be pre-appointed configuration information, or sent by the base station to the UE, that is, the base station can use the configuration information to inform the UE in which search space ID or search space IDs can be used for the PDCCH.
  • PDCCH blind detection is performed on the search space of multiple repeated transmissions.
  • blindly detecting the PDCCH may include:
  • the second mapping relationship determines the second configuration parameter corresponding to the number of candidate transmissions of the at least one PDCCH; wherein, the second mapping relationship is between each transmission number and each second configuration parameter Correspondence;
  • the second configuration parameter includes at least one of the following parameters:
  • the blind detection may not be continued in other search spaces. It may be that regardless of whether the PDCCH is blindly detected in the search space corresponding to the number of candidate transmissions of a certain PDCCH, the blind detection is continued on other determined search spaces.
  • the present disclosure also provides a physical downlink control channel sending device, which can be specifically implemented as a base station or a physical device in the base station, such as As shown in FIG. 6, the device 100 for sending the physical downlink control channel may include a search space determining module 110 and a PDCCH sending module 120. in:
  • the search space determining module 110 is configured to determine a search space for transmitting the PDCCH from the search space for repeatedly transmitting the PDCCH; wherein, the candidate search space for transmitting the PDCCH for multiple times is a unit of time. All search spaces or at least one search space;
  • the PDCCH sending module 120 is configured to send the PDCCH according to the determined search space.
  • the search space determination module can be configured as:
  • the search space for sending the PDCCH is determined.
  • the search space determining module determines the search space used to send the PDCCH according to the number of times the PDCCH is sent, it may be configured as:
  • the first mapping relationship includes at least a search space corresponding to the number of times each candidate is sent.
  • the search space sets corresponding to the candidate transmission times of each PDCCH are not completely the same or completely different;
  • the sets of candidate transmission times of the PDCCH corresponding to each candidate search space are not completely the same or completely different.
  • the sending device further includes a first information sending module configured to:
  • Sending instruction information where the instruction information is used to indicate the number of times of at least one candidate transmission of the PDCCH.
  • the candidate search space used to repeatedly transmit the PDCCH for multiple times includes two or more search spaces, and the two or more search spaces correspond to the same search space identification ID, or two or more search spaces Part or all of the search spaces in corresponds to different search space IDs.
  • the candidate search space used to repeatedly transmit the PDCCH for multiple times includes two or more search spaces, and the first configuration parameters corresponding to at least two of the two or more candidate search spaces are different ,
  • the first configuration parameter includes at least one of the following:
  • the sending device further includes a second information sending module, which is configured to:
  • the first configuration information is sent, and the first configuration information is used to indicate to the receiving end the search space ID corresponding to the search space used to send the PDCCH.
  • the PDCCH sending module is also configured to:
  • the second mapping relationship is the corresponding relationship between each number of transmissions and each second configuration parameter; wherein the second configuration parameter includes at least one of the following parameters:
  • the PDCCH sending module when the PDCCH sending module sends the PDCCH according to the determined search space, it can be configured as:
  • the PDCCH is sent according to the determined second configuration parameter and the determined search space.
  • the present disclosure also provides a physical downlink control channel receiving apparatus, which can be specifically implemented as user equipment or one of user equipment.
  • a physical component wherein the device includes a PDCCH blind detection module, and the PDCCH blind detection module is configured as:
  • the candidate search space used to repeatedly transmit the PDCCH for multiple times is all search spaces in one time unit or at least one search space.
  • the PDCCH blind detection module determines the candidate search space for repeated PDCCH transmission multiple times, it can be configured as:
  • a candidate search space for transmitting the PDCCH is determined.
  • the PDCCH blind detection module determines the candidate search space for PDCCH transmission according to the number of PDCCH candidate transmissions, it can be configured as:
  • the first mapping relationship includes at least a search space corresponding to the number of times each candidate is sent.
  • the search space sets corresponding to the candidate transmission times of each PDCCH are not completely the same or completely different;
  • the set of candidate transmission times of the PDCCH corresponding to each candidate search space is not completely the same or completely different.
  • the receiving device further includes an information receiving module configured to:
  • the PDCCH blind detection module may be configured to blindly detect the PDCCH according to the determined candidate search space for repeated transmission of the PDCCH for multiple times:
  • the first configuration parameter includes at least one of the following parameters:
  • PDCCH candidate transmission position corresponding to at least one aggregation level in the aggregation level set.
  • the PDCCH blind detection module can be configured as:
  • the first configuration information is used to indicate a search space ID corresponding to a search space used to send the PDCCH;
  • the PDCCH blind detection module may be configured to blindly detect the PDCCH according to the determined candidate search space for repeated transmission of the PDCCH for multiple times:
  • the second configuration parameter corresponding to the number of candidate transmissions of at least one PDCCH is determined; wherein, the second mapping relationship is the difference between each transmission number and each second configuration parameter.
  • the second configuration parameter includes at least one of the following parameters:
  • the device provided in the embodiment of the present disclosure is a device that can execute the corresponding method provided in the embodiment of the present disclosure, based on the method provided in the embodiment of the present disclosure, those skilled in the art can understand this
  • the specific implementation of the device of the embodiment and its various changes are disclosed, so how the device implements the method in the embodiment of the present disclosure will not be described in detail here.
  • those skilled in the art implement the methods in the embodiments of the present disclosure, they fall within the scope of the present disclosure.
  • each module included in the above-mentioned apparatus may be specifically implemented by software and/or hardware.
  • the present disclosure also provides an electronic device, which may include at least one processor, and the processor may be configured to execute the method provided in any optional embodiment of the present disclosure.
  • the electronic device may include at least one memory in which a computer program (or may also be referred to as computer instructions or code) is stored, and the aforementioned at least one processor may execute any one of the present disclosure when running the running computer program.
  • a computer program or may also be referred to as computer instructions or code
  • the aforementioned at least one processor may execute any one of the present disclosure when running the running computer program.
  • the present disclosure also provides a computer-readable storage medium in which a computer program is stored.
  • the computer program can execute the PDCCH transmission method shown in any optional embodiment of the present disclosure, or any PDCCH receiving method shown in an optional embodiment
  • FIG. 7 shows a schematic structural diagram of an electronic device that can be applied to the solution provided by the present disclosure, and the method provided by any optional embodiment of the present disclosure can be executed by the electronic device.
  • the electronic device 4000 includes a processor 4001 and a memory 4003. Among them, the processor 4001 and the memory 4003 are connected, for example, through a bus 4002.
  • the electronic device 4000 may further include a transceiver 4004. It should be noted that in actual applications, the transceiver 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation to the embodiments of the present disclosure.
  • the processor 4001 can be a CPU (Central Processing Unit, central processing unit), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application-specific integrated circuit), FPGA (Field Programmable Gate Array) , Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the present disclosure.
  • the processor 4001 may also be a combination that implements computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the bus 4002 may include a path for transferring information between the above-mentioned components.
  • the bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus or the like.
  • the bus 4002 can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used to represent in FIG. 7, but it does not mean that there is only one bus or one type of bus.
  • the memory 4003 can be ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, RAM (Random Access Memory), or other types that can store information and instructions
  • the dynamic storage device can also be EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory, CD-ROM) or other optical disk storage, optical disk storage (including compression Optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer Any other medium, but not limited to this.
  • the memory 4003 is used to store application program codes (computer programs) for executing the solutions of the present disclosure, and is controlled by the processor 4001 to execute.
  • the processor 4001 is configured to execute the application program code stored in the memory 4003 to implement the content shown in any of the foregoing method embodiments.

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Abstract

本公开实施例提供了一种物理下行控制信道的发送及接收方法、装置及电子设备,属于通信技术领域。其中,物理下行控制信道的发送方法包括:从用于多次重复传输物理下行控制信道PDCCH的候选搜索空间中,确定用于发送PDCCH的搜索空间;其中,上述用于多次重复传输PDCCH的搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间;根据确定的搜索空间发送PDCCH。基于本申请实施例所提供的方案,基站能够在一个时间单元内进行一次或多次同一PDCCH的重复发送。

Description

物理下行控制信道的发送及接收方法、装置及电子设备 技术领域
本公开涉及通信技术领域,具体而言,本公开涉及一种物理下行控制信道(PDCCH,physical downlink control channel)的发送及接收方法、装置及电子设备。
背景技术
在LTE 4G***中,为了支持物联网业务提出了MTC(Machine Type Communication,机器类通信)、NB-IoT(Narrow band Internet of thing,窄带物联网)两大技术。这两大技术主要针对的是低速率,高时延等场景。比如抄表,环境监测等场景。NB-IoT目前最大只能支持几百k的速率,MTC目前最大只能支持几M的速率。但同时另外一方面,随着物联网业务的不断发展,比如视频监控,智能家居,可穿戴设备和工业传感监测等业务的普及。这些业务通常要求几十到100M的速率,同时对时延也有相对较高的要求,因此,LTE中的MTC、NB-IoT技术很难满足要求。基于这种情况,开始提出了在5G NR(New Radio,新空口)中再设计一种新的用户设备用以来覆盖这种中端物联网设备的要求。在目前的3GPP标准化中,这种新的终端类型叫做Reduced capability UE(能力缩减的用户设备)或者简称为NR-lite(精简版新空口)。
同LTE中的物联网设备类似,基于5G NR-lite中的通常需要满足低造价、低复杂度、一定程度的覆盖增强、功率节省等要求。但由于目前的NR是针对高速率、低时延等高端终端设计的,当前的设计无法满足NR-lite的上述要求。因此,需要对目前的NR***进行改造用以满足NR-lite的要求。
发明内容
本公开的目的旨在更好的满足通信需求,至少解决现有技术中所存在的技术缺陷之一。
一方面,本公开提供了一种物理下行控制信道的发送方法,该方法包括:
从用于多次重复传输PDCCH的候选搜索空间中,确定用于发送PDCCH的搜索空间;其中,用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间;
根据确定的搜索空间发送PDCCH。
另一方面,本公开提供了一种物理下行控制信道的接收方法,该方法包括:
确定用于多次重复传输PDCCH的候选搜索空间;
根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH;其中,用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
再一个方面,本公开提供了一种物理下行控制信道的发送装置,该装置包括:
搜索空间确定模块,被配置为从用于多次重复传输PDCCH的候选搜索空间中,确定用于发送PDCCH的搜索空间;其中,用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间;
PDCCH发送模块,被配置为根据确定的搜索空间发送PDCCH。
另一个方面,本公开提供了一种物理下行控制信道的接收装置,该装置包括:
PDCCH盲检模块,被配置为确定用于多次重复传输PDCCH的候选搜索空间,以及根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH;
其中,用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
本公开还提供了一种电子设备,该电子设备包括存储器和处理器;
存储器中存储有计算机程序;
处理器用于在运行计算机程序时执行本公开所提供的物理下行控制信道的发送方法或接收方法。
本公开还提供了一种计算机可读存储介质,该存储介质中存储有计算机程序,该计算机程序在被处理器运行时用于本公开所提供的物理下行控制信道的发送方法或接收方法。
本公开实施例提供的技术方案所带来的有益效果将在下文的具体实施方式描述中,结合具体的可选实施例进行详细描述,在此不再展开说明。
附图说明
为了更清楚地说明本公开实施例中的技术方案,下面将对本公开实施例描述中所需要使用的附图作简单地介绍。
图1a为一种分布式配置的搜索空间的示意图;
图1b为一种集中式配置的搜索空间的示意图;
图2为本公开一示例中提供的一种搜索空间的配置方式的示意图;
图3为本公开一示例中提供的一种发送次数与搜索空间的对应关系的示意图;
图4a和图4b为本公开一示例中提供的两种发送次数与搜索空间配置参数的对应关系的示意图;
图5为本公开提供的一种物理下行控制信道的发送方法的流程示意图;
图6为本公开提供的一种物理下行控制信道的发送装置的结构示意图;
图7为本公开提供的一种电子设备的结构示意图。
具体实施方式
下面详细描述本公开的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的,仅用于解释本公开,而不能解释为对本公开的限制。
本技术领域技术人员可以理解,除非特意声明,这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是,本公开的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件,但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解,当我们称元件被“连接”或“耦接”到另一元件时,它可以直接连接或耦接到其他元件,或者也可以存在中间元件。此外,这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
除非另外定义,这里使用的所有术语(包括技术术语和科学术语),具有与本公开所属领域中的普通技术人员的一般理解相同的意义。这里所使用的“用户设备”、“终端”、“终端设备”既包括无线信号接收器的设备,其仅具备无发射能力的无线信号接收器的设备,又包括接收和发射硬件的设备,其具有能够在双向通信链路上,进行双向通信的接收和发射硬件的设备。这种设备可以包括:蜂窝或其他通信设备,其具有单线路显示器或多线路显示器或没有多线路显示器的蜂窝或其他通信设备;PCS(Personal Communications Service,个人通信***),其可以组合语音、数据处理、传真和/或数据通信能力;PDA(Personal Digital Assistant,个人数字助理),其可以包括射频接收器、寻呼机、互联网/内联网访问、网络浏览器、记事本、日历和/或GPS(Global Positioning System,全球定位***)接收器;常规膝上型和/或掌上型计算机或其他设备,其具有和/或包括射频接收器的常规膝上型和/或掌上型计算机或其他设备。这里所使用的“终端”、“终端设备”、“用户设备”可以是便携式、可运输、安装在交通工具(航空、海运和/或陆地)中的,或者适合于和/或配置为在本地运行,和/或以分布形式,运行在地球和/或空间的任何其他位置运行。这里所使用的“终端”、“终端设备”、“用户设备”还可以是通信终端、上网终端、音乐/视频播放终端,例如可以是PDA、MID(Mobile Internet Device,移动互联网设备)和/或具有音乐/视频播放功能的移动电话,也可以是智能电视、机顶盒等设备。
为了更好的理解和说明本公开所提供的各可选实施方式,下面首先对 与本公开相关的技术进行简要介绍。
5G NR-lite通常需要满足低造价、低复杂度、一定程度的覆盖增强、功率节省等要求。而目前的NR***是针对高速率、低时延等高端终端设计的,不能够较好的适用或者满足NR-lite的要求。针对该情况,需要对目前的NR***进行改造用以满足NR-lite的要求。比如,为了满足低造价,低复杂度等要求,可以限制NR-IoT的RF(Radio Frequency,射频)带宽,比如限制到5MHz或者10MHz,或者限制NR-lite的buffer(缓存)的大小,进而限制每次接收传输块的大小等等。针对功率节省,可能的优化方向是简化通信流程,减少NR-lite用户检测下行控制信道的次数等。
NR***中PDCCH的基本组成单元是REG(resource element group,资源元素组),一个REG在频域上对应一个PRB(physical resource block,物理资源块)的大小(12个RE(resource element,资源元素),在时域上对应一个OFDM(Orthogonal Frequency Division Multiplexing,即正交频分复用)符号的大小。6个REG会组成一个CCE(control channel element,控制信道元素)。在目前的NR***中,一个PDCCH可以由1,2,4,8,16个CCE构成,可以将一个PDCCH中包含的CCE的个数称为聚合程度或聚合等级(aggregation level,AL)。当一个PDCCH的信息比特固定的情况下,其聚合程度主要是由信道条件决定。当用户的信道条件较好时,可以使用较小的聚合程度,当信道条件较差时,选择较大的聚合程度。另外,对于不同聚合程度的PDCCH,协议支持多个候选传输位置。比,如对于CCE=4的PDCCH来说,可以有两个候选传输位置,基站和用户设备可以根据预设规则计算出这两个候选位置在所配置的控制资源集合中的CCE编号,比如为CCE#0~CCE#3,CCE#4~CCE#7。
在NR***中,协议规定了一个slot(时隙)内,在不同的子载波间隔参数(对应下表中的μ)下用户(即用户设备)最大的盲检(blind decoding,BD))次数,如下表1所示。
Figure PCTCN2020092183-appb-000001
表1
同时,在一个slot内,用户所监测的non-overlapping(非重叠)的CCE总数也不能超过下表2所示的数目:
Figure PCTCN2020092183-appb-000002
表2
在NR-lite中,由于用户设备能力的削弱,导致其覆盖能力相比正常NR用户设备要差,因此需要重复传输PDCCH。同时为了功率节省,最好是将重复的(即可能需要重复发送的)PDCCH传输使用集中传输,而不是分布式传输。如图1a和图1b,分别示出了一种分布式配置的搜索空间和集中式配置的搜索空间的示意图,图中示出了4个slot,图1a中所示的搜索空间可以理解为一个搜索空间标识(searchSpaceId,即搜索空间集合的ID)所对应的搜索空间,一个searchSpaceId可以配置一个或多个搜索空间,如图1a中,一个slot配置有一个searchSpaceId对应的搜索空间,一个searchSpaceId配置有两个搜索空间(图中带有填充的部分),而图1b所示的集中式分布中,一个slot内可以配置有多个searchSpaceId对应的搜索空间。如果考虑集中式传输,虽然能够节省功率,但可能在一个slot中超过对盲检次数和对non-overlapping CCE的限制。
为了更好的满足通信需求,减少用户设备的盲检次数或减少non-overlapping CCE的方法,使得在一个slot中能支持较多的PDCCH重复传输,本公开提供了一种物理下行控制信道的发送及接收方法、装置及电子设备。
下面以具体地实施例对本公开的技术方案以及本公开的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以相互结合,对于相同或相似的概念或过程可能在某些实施例中不再赘述。下面将结合附图,对本公开的实施例进行描述。
为使本公开的目的、技术方案和优点更加清楚,下面首先对本公开所提供的各可选实施方式所依据的原理进行说明,需要说明的是,本公开的各可选实施方式可以是依据下文所描述的原理中的部分或者全部实现的,不同的可选实施方式在不存在冲突的前提下也可以相互结合,基于本公开下文所描述的技术原理,本领域技术人员是可以对各可选实施方式做出调整、修改、润饰或者组合的,这些都属于本公开所包含的范围之内。
原理一
可选的,可以配置在一个slot内可用于多次重复传输PDCCH的搜索空间,也就是说,一个slot内可以配置有专门的能够用于多次重复传输PDCCH的候选搜索空间,也可以称为指定搜索空间或者特定搜索空间,基站可以在这些搜索空间中进行PDCCH的一次或多次发送。
可选的,对于一个slot内的候选搜索空间(可以是该slot内的任意搜索空间,也可以是上述配置的专门用于多次重复传输PDCCH的搜索空间),可以约定或配置每个搜索空间内所支持的CCE聚合程度和/或PDCCH候选传输位置(Number of PDCCH candidates,也可以称为Number of PDCCH location)不同。也就是说,对于可能要进行重传的PDCCH,传输该PDCCH的搜索空间所对应的CCE聚合程度和/或PDCCH候选传输位置可以与现有的不同,通过限定搜索空间的CCE聚合程度和/或PDCCH候选传输位置来避免或减少一个slot中超过对盲检次数和对non-overlapping CCE的限制的问题。
作为一个示例,图2中示出了基于上述原理的一个slot内的候选搜索空间的配置示意图,该示例中在一个slot中配置了3个可用于多次重复传输PDCCH的候选搜索空间(图中所示的重复的搜索空间即Repeated SS),即图中所示的候选搜索空间S1、S2和S3,如图2中所示,该示例中的第一个候选搜索空间即S1中支持CCE AL 4,8,16,在第2个和第3个候 选搜索空间中只支持CCE AL 16。此外,每个聚合等级所对应的PDCCH候选传输位置(即图中所示的Number of PDCCH location)也可以配置。如图2中所示,该示例中,对于3个可用于多次重复传输PDCCH的搜索空间,空间S1对应有一种AL集合中各聚合等级和PDCCH候选传输位置的映射关系,空间S2和空间S3对应有另一种AL聚合中各聚合等级和PDCCH候选传输位置的映射关系。例如,空间S1所支持的聚合等级4所对应的PDCCH候选传输位置有2个,聚合等级8所对应的PDCCH候选传输位置为1个,而空间S2和空间S3只支持聚合等级16,对应的PDCCH候选传输位置为1个。
基于图2中所示的方案,基站向NR-lite类型的用户设备发送PDCCH时,如果只进行一次发送,可以从上述3个搜索空间中选择一个,如果是进行两次发送,则可以从上述3个搜索空间中选择两个,但在进行两次发送,由于空间S1支持的聚合等级包括4,8和16,而空间S2和空间S3只支持聚合等级16,那基站在发送该PDCCH时,所选择的搜索空间对应的聚合等级只能是16。而UE在接收基站发送的PDCCH时,即进行PDCCH盲检时,可以在上述三个搜索空间中基于上述配置进行相应的盲检,可选的,上述配置信息可以是基站指示给用户设备的,也可以是协议约定好的。
可选的,在上述可选方案中,拥有不同配置的且可以用来重复传输相同PDCCH的候选搜索空间可以是同一个搜索空间(即搜索空间ID相同,可以理解为属于同一搜索空间集合),也可以是不同的搜索空间(搜索空间ID不同)。可选的,对于使用相同搜索空间的情况,在搜索空间配置时,可以配置两个或者多个AL与PDCCH候选传输位置的pattern(模式),即上述映射关系。比如图2所示的上述例子中,配置有两个不同的pattern,对于某次在搜索空间进行PDCCH重复传输中需要使用哪个pattern,基站可以进行配置或者根据预设规则设置,即基站可以向UE发行采用哪个pattern的指示信息,或者是基站和UE可以按照预先约定好的规则来确定采用哪个pattern,比如在一个slot中的第一个搜索空间使用pattern1,剩下的其余搜索空间使用pattern2。
可选的,对于使用不同的搜索空间的情况,基站可以配置,或者基站 和UE可以预设约定哪个或哪些搜索空间可用作同一PDCCH的多次重复传输或者默认在这个slot中所有配置的候选搜索空间都可以用来传输。例如,对于一个UE而言,其可以对应多个搜索空间ID下的搜索空间,在进行PDCCH传输时,基站可以向UE发送指示信息,来指示UE所对应的哪个或哪些搜索空间ID对应的候选搜索空间可用作同一PDCCH的多次重复传输,比如,基站指示的搜索空间ID为ID1,则UE可在ID1所对应的能够用于同一PDCCH的多次重复传输的候选搜索空间进行PDCCH盲检,例如,在基于图2所示的配置时,UE可以在ID1对应的三个候选搜索空间进行PDCCH盲检。
原理二
可选的,可以限制一个slot中候选搜索空间的使用对象,即某个候选搜索空间只能给特定的重复传输次数(即重复发送次数)的PDCCH使用。也就是说,对于同一PDCCH,可以根据该PDCCH所要传输的次数来确定用于传输该PDCCH的搜索空间。
作为一个示例,图3中示出了一种基于该原理的搜索空间的配置示意图,如图中所示,一个slot中配置有4个重复传输的候选搜索空间(即可用于多次重复传输PDCCH的搜索空间)。图中的R表示PDCCH的重复传输次数即发送次数,该示例中,如果PDCCH的重复次数为1(R=1,也就是PDCCH只发送一次),那么可以限制只能在图中所示的第一个候选搜索空间中传输,如果重复传输次数为2,那么可以限制只能在图中所示的第一个候选搜索空间和第二个候选搜索空间重复发送,当然也可以限制在第一个候选搜索空间和第三个候选搜索空间重复发送。如果重复传输次数为4,那么则在四个候选搜索空间进行PDCCH的重复发送。
需要说明的是,本公开的各示例中,第一个、第二个等描述方式只是为了便于描述,是为了区分不同的搜索空间,并非搜索空间的绝对顺序。其中,对于各搜索空间,哪个是第一个,哪个是第二个的配置或约定方式本公开不做限定,如可以基于一定的规则来约定哪个是第一个、哪个是第二个,也可以是根据搜索空间对应的时域位置或者其他信息来区分。当然,在实际应用中,也可以没有实际上的第一个或者第二个,而是可以采用搜 索空间的某个或某些标识来区分不同的搜索空间。
可选的,对于可用于多次重复传输PDCCH的候选搜索空间,每个候选搜索空间所对应的重复传输次数集合(可以包含一个次数,也可以是包含多个次数)可以不同,基于该配置,基站在向UE发送进行PDCCH时,可以根据需要重复传输的次数来确定所要使用的搜索空间。例如,以图3所示一个时隙内配置了上述4个可以用于PDCCH重复传输的候选搜索空间为例,可以配置第一个候选搜索空间对应的重复传输次数集合为{1,2,3,4},第二个候选搜索空间对应的重复传输次数集合为{2,3,4},第三个候选搜索空间对应的重复传输次数集合为{3,4},第四个候选搜索空间对应的重复传输次数集合为{4}。基于该配置,基站在发送PDCCH时,如果PDCCH的传输次数为1次,则所使用的搜索空间为第一个候选搜索空间,如果PDCCH的传输次数为2,则所使用的搜索空间为第一个候选搜索空间和第二个候选搜索空间。
原理三
可选的,在一个slot中,不同的PDCCH重复发送次数可以对应不同的CCE聚合等级和/或不同的PDCCH候选传输位置。也就是说,可以通过限定候选搜索空间所对应的CCE聚合等级和/或不同的PDCCH候选传输位置,与PDCCH重复发送次数的对应关系,来避免或减少一个slot中超过对盲检次数和对non-overlapping CCE的限制的问题。
可选的,不同的PDCCH重复发送次数可以对应不同的CCE聚合等级和/或不同的PDCCH候选传输位置的配置,可以是对一个slot的任意搜索空间而言的,如果配置了可以用于多次重复传输PDCCH的候选搜索空间,则该配置则可以是对这些候选搜索空间而言的。
作为一个示例,图4a和图4b示出了本公开提供的两种搜索空间的配置方式的示意图,其中,配置方式也可以称为搜索空间模式(pattern),如图4a中的配置方式为搜索空间pattern1,图4b中的配置方式为搜索空间pattern2,搜索空间pattern1和pattern2分别对于不同的PDCCH重复发送次数,比如,当重复发送次数为1时,对应搜索空间pattern1,当重复发送次数大于1时,对应搜索空间pattern2。由图中可以看出,对于搜索 空间pattern1,搜索空间所支持的聚合等级即AL包括4,8,16,每种聚合等级对应的PDCCH候选传输位置分别为2个、1个和1个,而搜索空间pattern1所支持的聚合等级只有16,该聚合等级对应的候选传输位置为1。
需要说明的是,对于本公开上述描述中所提供的各可选配置方式,其中的部分或全部可以是协议已经约定好的,即基站和UE之间都已知的,也可以是基站通过信令或者其他方式指示给UE的。例如,上述图2、图3、以及图4a和图4b中所示的配置方案可以是协议约定好的。在实际应用中,基站在需要向UE发送PDCCH时,基站还可以向UE发送其他相关的指示信息,以使UE可以根据该指示信息进行PDCCH的盲检,减少UE的盲检复杂度,例如,对于图2中所示的配置方式,在搜索空间可以支持多个AL时,基站可以向UE发送一个用于指示聚合等级的配置信息,如搜索空间支持的聚合等级为4,8和16,基站可以指示UE发送PDCCH时,搜索空间所对应的聚合等级集合为{4,8},那么UE则可以基于该聚合等级集合,进行PDCCH的盲检。
下面对本公开所提供的各可选实施例进行描述,各可选实施例可以是基于本公开所提供的上述多个原理中的一个、多个或者一个中的部分来实现的。
图5示出了本公开提供的一种物理下行控制信道的发送方法,该方法具体可以由基站执行,如图5中所示,该方法可以包括:
步骤S110:从用于多次重复传输PDCCH的搜索空间中,确定用于发送PDCCH的搜索空间;
其中,用于多次重复传输PDCCH的搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
步骤S120:根据确定的搜索空间发送PDCCH。
需要说明的是,用于多次重复传输PDCCH的候选搜索空间是指在这些搜索空间能够进行PDCCH的多次发送的所有或部分搜索空间,也就是能够用于多次PDCCH发送的搜索空间中的部分或全部。当然,在实际应用中,能够进行PDCCH多次发送的搜索空间,也可以用于进行一次 PDCCH发送。也就是说,步骤S120中的根据确定的搜索空间发送PDCCH,可以是基站在确定出的搜索空间进行一次PDCCH的发送,也可以是基站在确定出的搜索空间重复发送PDCCH,即进行同一PDCCH的多次发送。
可选的,基站在从用于多次重复传输PDCCH的候选搜索空间中确定用于发送PDCCH的搜索空间时,可以根据包括但不限于UE的相关信息(如UE的能力信息)、信道条件、PDCCH需要发送的次数等在内的信息中的一项或多项确定。比如,如果PDCCH的传输次数为一次,基站可以从能够用于多次重复传输PDCCH的搜索空间中随机选择一个用于发送PDCCH,还可以根据信道条件选择,比如信道条件较差,则选择支持较大的聚合等级的搜索空间。
可选的,本公开中,对于用于(能够用于)多次重复传输PDCCH的每个候选搜索空间而言,该候选搜索空间所对应的聚合等级集合可以为聚合等级全集的子集,和/或,聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置的数量小于或等于该聚合等级对应的设定数量。
其中,上述聚合等级全集是指现有NR***中的聚合等级集合,即包含1,2,4,8,16的聚合等级集合。对于一个聚合等级而言,上述设定数量是指现有NR***中一个聚合等级所对应的PDCCH候选传输位置的数量。
该可选方案中,可以通过限制可以用于多次重复传输PDCCH的搜索空间所支持的聚合等级和/或PDCCH候选传输位置来实现UE的PDCCH盲检复杂度的控制。作为一可选方案,如图2所示的示例中,对于一个时间单元,可以配置该时间单元内的多个用于多次重复传输PDCCH的搜索空间,即将某些搜索空间作为能够用于多次重复传输PDCCH的搜索空间,并可以限制这些搜索空间的聚合等级和/或PDCCH候选传输位置。相应的,UE在接收基站发送的PDCCH时,则可以在这些搜索空间上,基于各搜索空间所对应的聚合等级和/或PDCCH候选传输位置的配置信息,进行PDCCH的盲检。
其中,对于时间单元的时间粒度,本公开不做限定,可选的,一个时间单元可以是一个slot,前文中在进行本公开的原理说明时,一个时间单 元的时间粒度均是以slot为例进行说明。在实际应用中,对应于不同的实际应用需求或者应用场景,时间单元也可以采用其他的时间粒度。
本公开的可选实施例中,从用于多次重复传输PDCCH的搜索空间中,确定用于发送PDCCH的搜索空间,包括:
根据PDCCH的发送次数,确定用于发送PDCCH的搜索空间。
作为一可选方案,可以限制能够用于多次重复传输PDCCH的搜索空间与PDCCH的重复发送次数的对应关系,基站在发送PDCCH时,则可以基于PDCCH的发送次数确定具体采用哪个或哪些搜索空间。作为另一可选方案,也可以根据PDCCH的发送次数、以及各搜索空间的配置参数来确定所采用的搜索空间,比如,不同的搜索空间对应的AL不同,那么在确定搜索空间时,可以根据发送次数和信道条件,选择相应个数的搜索空间,如信道条件较差时,选择支持等级相对较大的搜索空间。
本公开的可选实施例中,根据PDCCH的发送次数,确定用于发送PDCCH的搜索空间,包括:
根据PDCCH的发送次数、以及第一映射关系,确定用于发送PDCCH的搜索空间;
其中,第一映射关系至少包括各个候选发送次数对应的搜索空间。
可选的,各个PDCCH的候选发送次数所对应的搜索空间集合不完全相同或完全不相同;
或者,
各个候选搜索空间所对应的PDCCH的候选发送次数集合不完全相同或完全不相同。
本公开中,对于一个PDCCH而言,候选发送次数是指基站可能发送该PDCCH的次数,假设一个PDCCH的最多可重复发送的次数为4次,则候选发送次数可以是1次、2次、3次或者4次。
在实际应用中,可以为每个候选发送次数,配置其对应的搜索空间集合,也可以是为每个能够用于多次发送PDCCH的搜索空间,配置该搜索空间所支持的PDCCH的重复发送次数。也就是说,上述映射关系,可以是为发送次数配置的,每个发送次数对应的搜索空间集合不同;也可以是 为搜索空间配置的,每个搜索空间对应不同的发送次数集合。
以图3为例,一个时隙内配置了4个能够用于多次发送PDCCH的候选搜索空间,一种可选方式,对于发送次数为1(即图中所示的R=1)、发送次数为2等,可以配置该次数对应的搜索空间集合,比如R=1时,搜索空间集合包括图3中示出了的第一个候选搜索空间,R=2时,搜索空间集合包括图3中示出了的第一个候选搜索空间和第二个候选搜索空间。另一可选方式,则可以是对每个搜索空间进行配置,比如对于第一个候选搜索空间,其对应的发送次数集合可以包括1、2、3和4,对于第二个候选搜索空间,其对应的发送次数集合可以包括2、3和4。
本公开的可选实施例中,该方法还可以包括:
发送指示信息,该指示信息用于指示PDCCH的至少一个候选发送次数。
在实际应用中,对于一个PDCCH,基站在向UE发送该PDCCH时,基站是能够确定出是发送几次,因此,基站可以向UE发送一指示信息来告知UE至少一个候选发送次数即可能的发送次数,例如,基站在需要重复发送两次PDCCH时,可以告知UE候选发送次数为1次和2次,则UE在盲检PDCCH时,则可以基于指示的候选发送次数和其他配置,进行PDCCH盲检。其中,基站告知UE的可能发送次数可以是一个次数,也可以是一个次数集合,即上述可能发送次数,可以是基站实际要发送的次数,也可以是包含实际要发送的次数和其他可能的发送次数。
本公开的可选实施例中,用于多次重复传输PDCCH的候选搜索空间包含多个(包括两个或两个以上的)搜索空间,多个搜索空间对应同一搜索空间标识ID,或者多个搜索空间中的部分或全部搜索空间对应不同的搜索空间ID。
也就是说,对于用于多次重复传输PDCCH的多个候选搜索空间而言,这些多个搜索空间可以对应于同一搜索空间集合,或者这多个搜索空间中的至少两个可以分别对应于不同的搜索空间集合。例如,以图2中所示的三个能够用于多次重复传输PDCCH的搜索空间而言,空间S1、S2和S3可以是同一个搜索空间ID下的三个搜索空间,也可以是其中的两个是同 一个搜索空间ID下的搜索空间,另一个是另外一个搜索空间ID下的搜索空间,还可以是空间S1、S2和S3分别对应于三个不同的搜索空间ID。
本公开的可选实施例中,用于多次重复传输PDCCH的候选搜索空间包含多个(两个或两个以上的)搜索空间,该多个候选搜索空间中的至少两个搜索空间所对应的第一配置参数不同,其中,第一配置参数包括以下的至少一种:
聚合等级集合,聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置。
即,用于多次重复传输PDCCH的多个候选搜索空间中的部分或者全部可以配置对应于不同的聚合等级集合和/或PDCCH候选传输位置。基于该方案,基站在发送PDCCH时,则可以根据所确定出的搜索空间聚合等级集合和/或PDCCH候选传输位置,进行PDCCH的一次或多次发送。相应的,UE在至少一个候选搜索空间进行PDCCH盲检时,则可以基于各候选搜索空间各自对应的配置参数进行盲检。
作为一可选方案,对于不同的可用于多次重复传输PDCCH的候选搜索空间,可以配置不同的聚合等级集合和PDCCH候选传输位置的对应关系,如图2中所示的示例中,候选搜索空间S1对应一种AL和PDCCH候选传输位置的映射关系,候选搜索空间S2和S3对应另外一种AL和PDCCH候选传输位置的映射关系。
本公开的可选方案中,该方法还可以包括:
发送第一配置信息,第一配置信息用于向接收端指示用于发送PDCCH的搜索空间所对应的搜索空间ID。
也就是说,基站可以通过发送配置信息(也可以称为指示信息或者其他名称)来告知UE哪个或者哪些搜索空间ID对应的候选搜索空间(能够用于重复发送PDCCH的候选搜索空间)来进行同一PDCCH的多次重复发送。其中,该方案可以适用于多个候选搜索空间对应于同一搜索空间ID的情况,也适用于多个候选搜索空间对应至少两个搜索空间ID的情况。
当然,也可以是协议约定好了哪个或者哪些搜索空间ID对应的候选 搜索空间可以用来传输同一PDCCH的多次重复发送,或者基站和UE可以根据预约定好的规则自行确定,或者是默认在一个时间单元中所有配置的搜索空间ID下的候选搜索空间都可以用来传输。此时,基站则可以不用向UE发送上述配置信息。比如,对于一个UE而言,可以协议约定在该UE所对应的所有搜索空间ID中符合预设条件(如ID编号较小)的搜索空间ID下的搜索空间中进行PDCCH传输。
本公开的可选实施例中,该方法还可以包括:
根据PDCCH的发送次数、以及第二映射关系,确定用于发送PDCCH的搜索空间所对应的第二配置参数;
其中,第二映射关系为各个发送次数与各第二配置参数之间的对应关系,其中,第二配置参数包括以下的至少一个参数:
聚合等级集合,聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置;
相应的,此时,根据确定的搜索空间发送PDCCH,可以包括:
根据确定的第二配置参数,在确定的搜索空间发送PDCCH。
该可选方式中,则是限制了聚合等级和聚合等级所对应的PDCCH候选传输位置中的至少一项,与PDCCH的重发发送次数的对应关系。基站在发送一个PDCCH时,则可以根据需要发送的次数,确定搜索空间对应的配置参数,基于该配置参数在确定出的搜索空间进行PDCCH的一个或多次重复发送。例如,图4a和4b所示的两种AL集合和PDCCH候选传输位置的对应关系,在发送次数为1时,用于发送PDCCH的候选搜索空间所对应的配置为参数对应关系1所示的配置参数,在发送次数大于1时,用于发送PDCCH的候选搜索空间所对应的配置参数为对应关系2所示的配置参数。
下面将从UE侧对本公开所提供的一种物理下行控制信道的接收方法进行说明,该接收方法可以包括:
确定用于多次重复传输PDCCH的候选搜索空间;
根据确定的用于多次重发传输PDCCH的候选传输空间,盲检PDCCH;
其中,用于多次重复传输PDCCH的搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
对于接收PDCCH的UE而言,由于UE通常是不知道基站具体是在哪个或哪几个候选搜索空间上进行PDCCH的发送的,因此,UE通常需要在所有可能的候选搜索空间进行PDCCH的盲检。同样的,对于本公开,对于一个PDCCH而言,基站如果进行了该PDCCH的一次或多次重发发送,UE需要在用于多次重复传输PDCCH的候选搜索空间上进行PDCCH的盲检。
本公开的可选实施例中确定用于多次重复传输PDCCH的候选搜索空间,包括:
确定至少一个PDCCH的候选发送次数;
根据PDCCH的候选发送次数,确定用于发送PDCCH的候选搜索空间。
由前文描述可知,对于不同的PDCCH候选发送次数,可以对应有不同的候选搜索空间集合;或者,对于不同的候选搜索空间,可以对应有不同的PDCCH的重复发送次数,那么UE在进行PDCCH盲检时,则可以根据确定的一个或多个PDCCH的候选发送次数,确定出各候选发送次数各自对应的候选搜索空间,以在确定出的至少一个候选搜索空间进行PDCCH的盲检。
例如,以图3为例,对于候选发送次数1,其对应的搜索空间集合即为第一个候选搜索空间,则对于候选发送次数1,UE只需要在第一候选搜索空间进行盲检;对于候选发送次数2,UE需要在第一个和第二个候选搜索空间进行盲检。
本公开的可选实施例中,根据PDCCH的候选发送次数,确定用于发送PDCCH的候选搜索空间,包括:
根据PDCCH的候选发送次数、以及第一映射关系,确定用于发送PDCCH的候选搜索空间;
其中,第一映射关系至少包括各个候选发送次数对应的搜索空间。其中,对于该第一映射关系,可以参见前文对于第一映射关系的详细描述, 在此不再赘述。
可选的,每个PDCCH的候选发送次数所对应的搜索空间集合不完全相同或完全不相同;
或者,
每个候选搜索空间所对应的PDCCH的候选发送次数集合不完全相同或完全不相同。
本公开的可选实施例中,该方法还可以包括:
接收基站发送的PDCCH发送次数指示信息,该指示信息用于指示PDCCH的至少一个候选发送次数。
即,对于一个PDCCH,基站可以通过该指示信息告知UE可能的重复发送次数(即候选发送次数)。其中,该信息的具体形式本公开不做限定,可选的,该指示信息可以是显示信息,即直接指示候选发送次数的信息,也可以是隐式的信息,UE在接收到该隐式信息,可以根据***约定或者其他配置信息确定PDCCH的发送次数。
当然,在实际应用中,基站也可以不向UE发送该指示信息,UE则需要在对应于所有可能的次数的搜索空间进行盲检。比如,协议可以约定最大的重复发送次数为4次,基站可以通过该指示信息告知UE次数PDCCH重复传输的次数可能为1次和2次,或者,基站不告知UE时,UE在1次、2次、3次和4次所对应的所有可能搜索空间进行PDCCH盲检。
本公开的可选实施例中,根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH,包括:
根据确定的用于多次重复传输PDCCH的候选搜索空间的至少一个候选搜索空间所对应的第一配置参数,在该至少一个PDCCH候选搜索空间盲检PDCCH;
其中,第一配置参数包括以下的至少一个参数:
聚合等级集合,聚合等级集合中每个聚合等级对应的PDCCH候选传输位置。
由前文的描述可知,对于用于多次重复传输PDCCH的候选搜索空间 中而言,每个候选搜索空间可以对应有各自不同的聚合等级集合,和/或,每个候选搜索空间对应于不同的PDCCH候选传输位置的数量,此时,UE在进行PDCCH的盲检时,则可以根据各候选搜索空间各自对应的配置参数进行盲检。例如,图2所示的3个候选搜索空间中,空间S1对应一种聚合等级集合和该集合中各聚合等级对应的PDCCH候选传输位置的映射关系,空间S2和空间S3对应另一种映射关系,UE在空间S1进行PDCCH盲检时,则需要根据该空间对应的映射关系进行盲检,在空间S2和S3盲检时,则需要这两个空间对应的映射关系进行盲检。
需要说明的是,在实际应用中,对于一个PDCCH而言,对于确定的用于多次重复传输PDCCH的候选搜索空间,在候选搜索空间为多个时,UE如果在多个候选搜索空间中的一个或者多个搜索空间盲检到该PDCCH,UE可以不再在其他的候选搜索空间中进行盲检,当然,也可以是无论是否在一个或多个搜索空间盲检到了该PDCCH,UE都已继续进行盲检。也就是说,UE可以在每个搜索空间都进行了PDCCH盲检,也可以是在某个候选搜索空间检索到PDCCH后停止PDCCH盲检。
本公开的可选实施例中,确定用于多次重复传输PDCCH的候选搜索空间;根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH,可以包括:
确定第一配置信息,第一配置信息用于指示用于发送PDCCH的搜索空间所对应的搜索空间ID;
在第一配置信息所指示的搜索空间ID所对应的用于多次重复传PDCCH的候选搜索空间,盲检PDCCH。
可选的,该配置信息可以是预先约定好的配置信息,也可以是基站发送给UE的,即,基站可以通过该配置信息告知UE具体是在哪个或哪些搜索空间ID对应的能够用于PDCCH多次重复传输的搜索空间进行PDCCH盲检。其中,基站向UE发送第一配置信息的具体方式本公开实施例不做限定。
本公开的可选实施例中,根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH,可以包括:
根据至少一个PDCCH的候选发送次数、以及第二映射关系,确定该至少一个PDCCH的候选发送次数所对应的第二配置参数;其中,第二映射关系为各个发送次数与各第二配置参数之间的对应关系;
根据该至少一个候选发送次数所对应的第二配置参数,在该至少一个候选发送次数所对应的搜索空间盲检PDCCH;
其中,第二配置参数包括以下至少一个参数:
聚合等级集合,
聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置。
同样的,在实际应用中,UE在进行PDCCH的盲检时,如果在其中某个PDCCH的候选发送次数对应的搜索空间盲检到了PDCCH,则可以不再在其他搜索空间继续进行盲检,也可以是无论在某个PDCCH的候选发送次数对应的搜索空间是否盲检到了PDCCH,都继续在其他确定出的搜索空间上继续进行盲检。
对于该第二映射关系,具体可以参见前文对于第二映射关系的详细描述,在此不再赘述。
对于本领域技术人员而言清楚的是,基于本公开所提供的技术原理、以及上述各可选实施例,本领域技术人员是可以对各可选实施例进行组合使用或者是进行修改的。另外,对于上述分别基站侧和UE侧进行描述的方法,是可以相互参考的,基站侧所涉及的技术用语的说明是同样适用于UE侧的,基站侧的各可选方案的详细说明,也可以适用于UE侧的与基站侧相对应各可选方案的。
基于与本公开实施例所提供的物理下行控制信道的发送方法相同的原理,本公开还提供了一种物理下行控制信道的发送装置,该装置具体可以实现为基站或者基站中一个实体设备,如图6中所示,该物理下行控制信道的发送装置100可以包括搜索空间确定模块110和PDCCH发送模块120。其中:
搜索空间确定模块110,被配置为从用于多次重复传输PDCCH的搜索空间中,确定用于发送PDCCH的搜索空间;其中,用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个 搜索空间;
PDCCH发送模块120,用于根据确定的搜索空间发送PDCCH。
可选的,搜索空间确定模块可以被配置为:
根据PDCCH的发送次数,确定用于发送PDCCH的搜索空间。
可选的,搜索空间确定模块在根据PDCCH的发送次数,确定用于发送PDCCH的搜索空间时,可以被配置为:
根据PDCCH的发送次数、以及第一映射关系,确定用于发送PDCCH的搜索空间;
其中,第一映射关系至少包括各个候选发送次数对应的搜索空间。
可选的,各个PDCCH的候选发送次数所对应的搜索空间集合不完全相同或完全不相同;
或者,
各个候选搜索空间所对应的PDCCH的候选发送次数集合不完全相同或完全不相同。
可选的,该发送装置还包括第一信息发送模块,该模块被配置为:
发送指示信息,指示信息用于指示PDCCH的至少一个候选发送次数。
可选的,用于多次重复传输PDCCH的候选搜索空间包含两个或两个以上的搜索空间,两个或两个以上搜索空间对应同一搜索空间标识ID、或者两个或两个以上搜索空间中的部分或全部搜索空间对应不同的搜索空间ID。
可选的,用于多次重复传输PDCCH的候选搜索空间包含两个或两个以上搜索空间,两个或两个以上的候选搜索空间中的至少两个搜索空间所对应的第一配置参数不同,第一配置参数包括以下的至少一种:
聚合等级集合,
聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置。
可选的,该发送装置还包括第二信息发送模块,该模块被配置为:
发送第一配置信息,第一配置信息用于向接收端指示用于发送PDCCH的搜索空间所对应的搜索空间ID。
可选的,PDCCH发送模块还被配置为:
根据PDCCH的发送次数、以及第二映射关系,确定用于发送PDCCH的搜索空间所对应的第二配置参数;
其中,第二映射关系为各个发送次数与各第二配置参数之间的对应关系;其中第二配置参数包括以下的至少一个参数:
聚合等级集合,
聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置;
其中,PDCCH发送模块在根据确定的搜索空间发送PDCCH时,可以被配置为:
根据确定的第二配置参数和确定的搜索空间发送PDCCH。
基于与本公开实施例所提供的物理下行控制信道的接收方法相同的原理,本公开还提供了一种物理下行控制信道的接收装置,该装置具体可以被实现为用户设备或者用户设备中的一个实体部件,其中,该装置包括PDCCH盲检模块,该PDCCH盲检模块被配置为:
确定用于多次重复传输PDCCH的候选搜索空间,以及根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH;
其中,用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
可选的,PDCCH盲检模块在确定用于多次重复传输PDCCH的候选搜索空间时,可以配置为:
确定至少一个PDCCH的候选发送次数;
根据PDCCH的候选发送次数,确定用于发送PDCCH的候选搜索空间。
可选的,PDCCH盲检模块在根据PDCCH的候选发送次数,确定用于发送PDCCH的候选搜索空间时,可以配置为:
根据PDCCH的候选发送次数、以及第一映射关系,确定用于发送PDCCH的候选搜索空间;
其中,第一映射关系至少包括各个候选发送次数对应的搜索空间。
可选的,每个PDCCH的候选发送次数所对应的搜索空间集合不完全相同或完全不相同;
或者,
每个候选搜索空间所对应的PDCCH的候选发送次数集合不完全相同或完全不相同。
可选的,该接收装置还包括信息接收模块,该模块被配置为:
接收基站发送的PDCCH发送次数指示信息,该指示信息用于指示PDCCH的至少一个候选发送次数。
可选的,PDCCH盲检模块在根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH时,可以被配置为:
根据确定的用于多次重复传输PDCCH的候选搜索空间中的至少一个候选搜索空间所对应的第一配置参数,在至少一个候选搜索空间盲检PDCCH;
其中,第一配置参数包括以下的至少一个参数:
聚合等级集合,
聚合等级集合中至少一个聚合等级对应的PDCCH候选传输位置。
可选的,PDCCH盲检模块可以被配置为:
确定第一配置信息,第一配置信息用于指示用于发送PDCCH的搜索空间所对应的搜索空间ID;
在第一配置信息所指示的搜索空间ID所对应的用于多次重复传PDCCH的候选搜索空间,盲检PDCCH。
可选的,PDCCH盲检模块在根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检PDCCH时,可以被配置为:
根据至少一个PDCCH的候选发送次数、以及第二映射关系,确定至少一个PDCCH的候选发送次数所对应的第二配置参数;其中,第二映射关系为各个发送次数与各第二配置参数之间的对应关系;
根据至少一个候选发送次数所对应的第二配置参数,在至少一个候选发送次数所对应的搜索空间盲检PDCCH;
其中,第二配置参数包括以下至少一个参数:
聚合等级集合,
聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置。
需要说明的是,由于本公开实施例所提供的装置为可以执行本公开实施例中所提供的相应方法的装置,故而基于本公开实施例中所提供的方法,本领域所属技术人员能够了解本公开实施例的装置的具体实施方式以及其各种变化形式,所以在此对于该装置如何实现本公开实施例中的方法不再详细介绍。只要本领域所属技术人员实施本公开实施例中的方法所采用的装置,都属于本公开所欲保护的范围。其中,上述装置中所包含的各模块具体可以通过软件和/或硬件实现。
本公开还提供了一种电子设备,该电子设备可以包括至少一个处理器,该处理器可以被配置为用于执行本公开任一可选实施例中所提供的方法。
可选的,该电子设备可以包括至少一个存储器,该存储器中存储有计算机程序(或者也可以称为计算机指令或代码),上述至少一个处理器在运行该运行计算机程序时可以执行本公开任一可选实施例所示的PDCCH的发送方法,或者任一可选实施例中所示的PDCCH的接收方法。
本公开还提供了一种计算机可读存储介质,该存储介质中存储有计算机程序,计算机程序在被处理器运行时能够执行本公开任一可选实施例所示的PDCCH的发送方法,或者任一可选实施例中所示的PDCCH的接收方法
作为一示例,图7中示出了一种能够适用于本公开所提供的方案的电子设备的结构示意图,可以由该电子设备执行本公开任一可选实施例所提供的方法。如图7所示,该电子设备4000包括:处理器4001和存储器4003。其中,处理器4001和存储器4003相连,如通过总线4002相连。可选地,电子设备4000还可以包括收发器4004。需要说明的是,实际应用中收发器4004不限于一个,该电子设备4000的结构并不构成对本公开实施例的限定。
处理器4001可以是CPU(Central Processing Unit,中央处理器),通用处理器,DSP(Digital Signal Processor,数据信号处理器),ASIC(Application Specific Integrated Circuit,专用集成电路),FPGA(Field Programmable Gate Array,现场可编程门阵列)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本公 开公开内容所描述的各种示例性的逻辑方框、模块和电路。处理器4001也可以是实现计算功能的组合,例如包含一个或多个微处理器组合,DSP和微处理器的组合等。
总线4002可包括一通路,在上述组件之间传送信息。总线4002可以是PCI(Peripheral Component Interconnect,外设部件互连标准)总线或EISA(Extended Industry Standard Architecture,扩展工业标准结构)总线等。总线4002可以分为地址总线、数据总线、控制总线等。为便于表示,图7中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
存储器4003可以是ROM(Read Only Memory,只读存储器)或可存储静态信息和指令的其他类型的静态存储设备,RAM(Random Access Memory,随机存取存储器)或者可存储信息和指令的其他类型的动态存储设备,也可以是EEPROM(Electrically Erasable Programmable Read Only Memory,电可擦可编程只读存储器)、CD-ROM(Compact Disc Read Only Memory,只读光盘)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质,但不限于此。
存储器4003用于存储执行本公开方案的应用程序代码(计算机程序),并由处理器4001来控制执行。处理器4001用于执行存储器4003中存储的应用程序代码,以实现前述任一方法实施例所示的内容。
应该理解的是,虽然附图的流程图中的各个步骤按照箭头的指示依次显示,但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明,这些步骤的执行并没有严格的顺序限制,其可以以其他的顺序执行。而且,附图的流程图中的至少一部分步骤可以包括多个子步骤或者多个阶段,这些子步骤或者阶段并不必然是在同一时刻执行完成,而是可以在不同的时刻执行,其执行顺序也不必然是依次进行,而是可以与其他步骤或者其他步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
以上所述仅是本公开的部分实施方式,应当指出,对于本技术领域的 普通技术人员来说,在不脱离本公开原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本公开的保护范围。

Claims (21)

  1. 一种物理下行控制信道的发送方法,其特征在于,包括:
    从用于多次重复传输物理下行控制信道PDCCH的候选搜索空间中,确定用于发送PDCCH的搜索空间;其中,所述用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间;
    根据确定的搜索空间发送PDCCH。
  2. 根据权利要求1所述的方法,其特征在于,所述从用于多次重复传输物理下行控制信道PDCCH的候选搜索空间中,确定用于发送PDCCH的搜索空间,包括:
    根据PDCCH的发送次数,确定用于发送PDCCH的搜索空间。
  3. 根据权利要求2所述的方法,其特征在于,所述根据PDCCH的发送次数,确定用于发送PDCCH的搜索空间,包括:
    根据PDCCH的发送次数、以及第一映射关系,确定用于发送PDCCH的搜索空间;
    其中,所述第一映射关系至少包括各个候选发送次数对应的搜索空间。
  4. 根据权利要求2或3所述的方法,其特征在于,其中,
    各个PDCCH的候选发送次数所对应的搜索空间集合不完全相同或完全不相同;
    或者,
    各个候选搜索空间所对应的PDCCH的候选发送次数集合不完全相同或完全不相同。
  5. 根据权利要求1或2或3所述的方法,其特征在于,还包括:
    发送指示信息,所述指示信息用于指示PDCCH的至少一个候选发送次数。
  6. 根据权利要求1所述的方法,其特征在于,所述用于多次重复传输PDCCH的候选搜索空间包含两个或两个以上的搜索空间,所述两个或两个以上搜索空间对应同一搜索空间标识ID、或者所述两个或两个以上搜索空间中的部分或全部搜索空间对应不同的搜索空间ID。
  7. 根据权利要求1或2所述的方法,其特征在于,所述用于多次重复传输PDCCH的候选搜索空间包含两个或两个以上搜索空间,所述两个或两个以上的候选搜索空间中的至少两个搜索空间所对应的第一配置参数不同,所述第一配置参数包括以下的至少一种:
    聚合等级集合,
    聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置。
  8. 根据权利要求7所述的方法,其特征在于,所述方法还包括:
    发送第一配置信息,所述第一配置信息用于向接收端指示用于发送PDCCH的搜索空间所对应的搜索空间ID。
  9. 根据权利要求1所述的方法,其特征在于,所述方法还包括:
    根据PDCCH的发送次数、以及第二映射关系,确定用于发送PDCCH的搜索空间所对应的第二配置参数;
    其中,所述第二映射关系为各个发送次数与各第二配置参数之间的对应关系;其中所述第二配置参数包括以下的至少一个参数:
    聚合等级集合,
    聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置;
    其中,所述根据确定的搜索空间发送PDCCH,包括:
    根据确定的所述第二配置参数,在确定的搜索空间发送PDCCH。
  10. 一种物理下行控制信道的接收方法,其特征在于,包括:
    确定用于多次重复传输PDCCH的候选搜索空间;
    根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检所述PDCCH;其中,所述用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
  11. 根据权利要求10所述的方法,其特征在于,所述确定用于多次重复传输PDCCH的候选搜索空间,包括:
    确定至少一个PDCCH的候选发送次数;
    根据PDCCH的候选发送次数,确定用于发送PDCCH的候选搜索空间。
  12. 根据权利要求11所述的方法,其特征在于,所述根据PDCCH的候选发送次数,确定用于发送PDCCH的候选搜索空间,包括:
    根据PDCCH的候选发送次数、以及第一映射关系,确定用于发送PDCCH的候选搜索空间;
    其中,所述第一映射关系至少包括各个候选发送次数对应的搜索空间。
  13. 根据权利要求11或12所述的方法,其特征在于,每个PDCCH的候选发送次数所对应的搜索空间集合不完全相同或完全不相同;
    或者,
    每个候选搜索空间所对应的PDCCH的候选发送次数集合不完全相同或完全不相同。
  14. 根据权利要求10或11或12所述的方法,其特征在于,所述方法包括:
    接收基站发送的PDCCH发送次数指示信息,所述指示信息用于指示 PDCCH的至少一个候选发送次数。
  15. 根据权利要求10所述的方法,其特征在于,所述根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检所述PDCCH,包括:
    根据确定的用于多次重复传输PDCCH的候选搜索空间中的至少一个候选搜索空间所对应的第一配置参数,在所述至少一个候选搜索空间盲检所述PDCCH;
    其中,所述第一配置参数包括以下的至少一个参数:
    聚合等级集合,
    聚合等级集合中至少一个聚合等级对应的PDCCH候选传输位置。
  16. 根据权利要求10所述的方法,其特征在于,所述确定用于多次重复传输PDCCH的候选搜索空间;根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检所述PDCCH,包括:
    确定第一配置信息,所述第一配置信息用于指示用于发送PDCCH的搜索空间所对应的搜索空间ID;
    在所述第一配置信息所指示的搜索空间ID所对应的用于多次重复传PDCCH的候选搜索空间,盲检所述PDCCH。
  17. 根据权利要求10至12所述的方法,其特征在于,所述根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检所述PDCCH,包括:
    根据至少一个PDCCH的候选发送次数、以及第二映射关系,确定所述至少一个PDCCH的候选发送次数所对应的第二配置参数;其中,所述第二映射关系为各个发送次数与各第二配置参数之间的对应关系;
    根据所述至少一个候选发送次数所对应的第二配置参数,在所述至少一个候选发送次数所对应的搜索空间盲检所述PDCCH;
    其中,所述第二配置参数包括以下至少一个参数:
    聚合等级集合,
    聚合等级集合中每个聚合等级所对应的PDCCH候选传输位置。
  18. 一种物理下行控制信道的发送装置,其特征在于,包括:
    搜索空间确定模块,被配置为从用于多次重复传输PDCCH的候选搜索空间中,确定用于发送PDCCH的搜索空间;其中,所述用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间;
    PDCCH发送模块,被配置为根据确定的搜索空间发送PDCCH。
  19. 一种物理下行控制信道的接收装置,其特征在于,包括:
    PDCCH盲检模块,被配置为确定用于多次重复传输PDCCH的候选搜索空间,以及根据确定的用于多次重复传输PDCCH的候选搜索空间,盲检所述PDCCH;
    其中,所述用于多次重复传输PDCCH的候选搜索空间为一个时间单元内的所有搜索空间或者至少一个搜索空间。
  20. 一种电子设备,其特征在于,所述电子设备包括存储器和处理器;
    所述存储器中存储有计算机程序;
    所述处理器用于在运行所述计算机程序时执行权利要求1至9中任一项、或者权利要求10至17中任一项所述的方法。
  21. 一种计算机可读存储介质,其特征在于,所述存储介质中存储有计算机程序,所述计算机程序在被处理器运行时用于执行权利要求1至9中任一项、或者权利要求10至17中任一项所述的方法。
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