CN111756512B - Blind detection method and device - Google Patents

Blind detection method and device Download PDF

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Publication number
CN111756512B
CN111756512B CN201910268022.9A CN201910268022A CN111756512B CN 111756512 B CN111756512 B CN 111756512B CN 201910268022 A CN201910268022 A CN 201910268022A CN 111756512 B CN111756512 B CN 111756512B
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time unit
terminal
pdcch
time
cces
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CN111756512A (en
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高飞
焦淑蓉
花梦
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP20785304.5A priority Critical patent/EP3941132A4/en
Priority to PCT/CN2020/081936 priority patent/WO2020200133A1/en
Priority to BR112021019440A priority patent/BR112021019440A2/en
Publication of CN111756512A publication Critical patent/CN111756512A/en
Priority to US17/487,859 priority patent/US12021666B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0238—Channel estimation using blind estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application provides a blind detection method and a device, wherein the method comprises the following steps: the method comprises the steps that terminal side equipment receives first indication information from network side equipment; the first indication information is used for indicating at least one time unit of N time units; any one of the N time units is a first time unit, the first time unit of the N time units corresponds to a class of terminal operation, the terminal operation is prohibited to execute a first operation, a second operation and a third operation, or execute at least one of the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, any one of the N time units includes at least one symbol, N is an integer greater than 0, the terminal side device determines the N time units according to the first indication information, and executes the corresponding terminal operation in the first time unit of the N time units.

Description

Blind detection method and device
The present application claims priority of the chinese patent application with the application number 201910252628.3 entitled "blind detection method and apparatus" filed by the chinese intellectual property office in 2019, 3, 29, which is incorporated herein by reference in its entirety.
Technical Field
The present application relates to the field of communications technologies, and in particular, to a blind detection method and apparatus.
Background
In a communication system, a network side device may send Downlink Control Information (DCI) to a terminal side device through a Physical Downlink Control Channel (PDCCH), where the DCI may include uplink scheduling information for scheduling the terminal side device to transmit data in a Physical Uplink Shared Channel (PUSCH) or include information such as downlink scheduling information for scheduling the terminal side device to receive a Physical Downlink Shared Channel (PDSCH). The PDCCH is transmitted in a plurality of consecutive Control Channel Elements (CCEs), the number of CCEs occupied by the PDCCH may be referred to as an aggregation level (aggregation level) of the PDCCH, for example, if the PDCCH occupies 4 CCEs, the aggregation level of the PDCCH is 4.
The network side device may configure a PDCCH candidate (candidate) set corresponding to each DCI in advance to the terminal side device through a high-layer signaling, but does not inform the terminal side device on which PDCCH candidate or PDCCH candidates the DCI is transmitted, but the terminal side device may determine, according to configuration information transmitted by the network side device, DCI which is currently expected to be received, so that the terminal side device may perform blind detection (blind detection) on PDCCH candidates in the PDCCH candidate set corresponding to the DCI which is currently expected to be received, according to the configuration information. Because the complexity of blind detection is high, when the terminal side equipment performs blind detection, a large amount of power consumption is consumed, so that the upper limit of blind detection times of the terminal side equipment in a time slot and the upper limit of the number of CCEs used by channel estimation are set.
In the prior art, in order to avoid that the number of blind detection times in a time slot is greater than the upper limit of the number of blind detection times and the number of CCEs used for channel estimation is greater than the upper limit of the number of CCEs, terminal side equipment needs to determine the number of blind detection times of a blind detection PDCCH before the PDCCH is detected in a blind manner and the number of CCEs used for channel estimation on the PDCCH. The operation of determining the number of blind detections of the blind PDCCH and the number of CCEs used for channel estimation by the terminal side device consumes a lot of resources, and particularly when the terminal side device receives multiple DCIs at the same time, the complexity of blind detection of the PDCCH by the terminal side device is significantly increased.
Disclosure of Invention
The embodiment of the application provides a blind detection method and device, which are used for solving the problem of how to reduce the complexity of a blind detection PDCCH.
In a first aspect, an embodiment of the present application provides a blind detection method, where the method includes: the method comprises the steps that terminal side equipment receives first indication information from network side equipment; the first indication information is used for indicating at least one time unit of N time units; any one of the N time units is a first time unit, the first time unit of the N time units corresponds to a class of terminal operation, the terminal operation is prohibited to execute a first operation, a second operation and a third operation, or execute at least one of the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, any one of the N time units includes at least one symbol, and N is an integer greater than 0;
the first operation is used for determining the blind detection times of the physical downlink control channel PDCCH in the current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit;
and the terminal side equipment determines the N time units according to the first indication information and executes the corresponding terminal operation in the first time unit of the N time units.
The network side device may instruct, according to the granularity of the time unit, the terminal side device to perform, in a certain time unit of the same transmission time unit, a part of operations from the first operation to the third operation instead of the first operation to the third operation, or not to perform the first operation to the third operation, so as to reduce the overhead of the terminal side device in blind detection of the PDCCH, and improve the blind detection efficiency.
In a second aspect, an embodiment of the present application provides a blind detection method, where the method includes: the method comprises the steps that terminal side equipment receives first indication information from network side equipment; the first indication information is used for indicating N time units and the type of each time unit in the N time units; for a first time unit of the N time units, the type of the first time unit is used to instruct the terminal-side device to perform at least one of a first operation, a second operation, and a third operation in the first time unit, or not to perform the first operation, the second operation, and the third operation; the N time units belong to the same transmission time unit, each time unit in the N time units comprises at least one symbol, and N is an integer greater than 0; the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used to determine whether the number of blind detections for blind-detecting the PDCCH in a current time unit is greater than a maximum number of blind detections for the current time unit, and/or to determine whether the number of non-overlapping CCEs in the current time unit is greater than a maximum number of CCEs for the current time unit;
and the terminal side equipment determines the type of each time unit in the N time units according to the first indication information, and executes the operation indicated by the type of the time unit in each time unit.
The network side equipment can indicate the type of each time unit through the first indication information, so that the terminal side equipment determines that only part of the first operation to the third operation is executed in a certain time unit in the same transmission time unit or the first operation to the third operation is not executed according to the type of each time unit, thereby reducing the cost of blind detection of the PDCCH by the terminal side equipment and improving the blind detection efficiency.
In a possible implementation manner, the corresponding terminal operation includes the first operation, and the terminal-side device performs the first operation in the first time unit according to the first indication information, including: the terminal side equipment determines the blind detection times of the PDCCH in the M PDCCH candidates of the first time unit according to a first preset condition; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0; if any two PDCCH candidates in the M PDCCH candidates meet a first preset condition, the any two PDCCH candidates correspond to one blind detection time, otherwise, the any two PDCCH candidates correspond to two blind detection times.
In a possible implementation manner, the first preset condition includes the following:
CCE sets corresponding to the two PDCCH candidates are the same;
scrambling code sequences of the two PDCCH candidates are the same;
the two PDCCH candidates are from the same control resource set CORESET;
and the length of the downlink control information DCI blindly detected in the two PDCCH candidates by the terminal side equipment is the same.
In a possible implementation manner, when the corresponding terminal operation includes the second operation, the terminal-side device executes the second operation in the first time unit according to the first indication information, including:
the terminal side equipment determines the number of the non-overlapping CCEs included in the M PDCCH candidates in the first time unit according to a second preset condition and a third preset condition; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0; wherein, for any two CCEs in the M PDCCH candidates, if the any two CCEs are respectively from different PDCCH candidates, if the any two CCEs satisfy at least one of the second preset condition and the third preset condition, the any two CCEs are two non-overlapping CCEs, otherwise, the any two CCEs are one non-overlapping CCE.
In a possible implementation manner, the second preset condition is that the two CCEs are from different control resource sets, CORESET; the third preset condition is that the time when the terminal side device blindly detects the PDCCH in the two PDCCH candidates corresponding to the two CCEs is different.
In a possible implementation manner, when the corresponding terminal operation includes the third operation, the terminal-side device executes the third operation in the first time unit according to the first indication information, including:
the terminal side device executes the following operations for the ith search space set in the P search space sets according to the priority order of the P search space sets configured by the network side device: the terminal side equipment judges whether the blind detection times corresponding to the PDCCH candidates located in the first time unit are greater than the maximum blind detection times corresponding to the first time unit in the PDCCH candidates from the 1 st search space set to the i th search space set, and if so, determines not to blindly detect the PDCCH in the i th search space set; i is an integer greater than or equal to 1 and less than or equal to P; or, the terminal side device determines whether the number of non-overlapping CCEs included in PDCCH candidates located in the first time unit is greater than the maximum CCE number corresponding to the first time unit, among PDCCH candidates included in 1 st to i-th search space sets, and if so, determines not to blindly detect the PDCCH in the i-th search space set; or, the terminal side device determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of blind detections corresponding to the PDCCH candidate located in the first time unit is less than or equal to the maximum blind detection number corresponding to the first time unit, and determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of non-overlapping CCEs included in the PDCCH candidate located in the first time unit is less than or equal to the maximum CCE number corresponding to the first time unit, and then determines to blindly detect the PDCCH in the i-th search space set.
As a possible implementation manner, the transmission time unit includes K common search space sets and H user equipment dedicated search space sets, where K and H are both integers greater than or equal to 0 (where 0 represents absence); when the corresponding terminal operation includes the third operation, the terminal-side device executes the third operation in the first time unit according to the first indication information, including:
the terminal side equipment executes the following operations according to the sequence from small to large of the search space set identifications of the H user equipment special search space sets:
aiming at the user equipment special search space set with the search space set identification j in the H user equipment special search space sets, the terminal side equipment judges that the search space set identification is j min Whether the blind detection times corresponding to the PDCCH candidate in the first time unit are greater than the difference between the maximum blind detection times corresponding to the first time unit and the first blind detection times among the PDCCH candidates included in the ue-specific search space set to the ue-specific search space set identified by j. If the number of the search space sets is larger than the preset number, the search space set identifier in the H user equipment special search space sets is j min In the PDCCH candidates included in the ue-specific search space set from the ue-specific search space set to the search space set identifier j', the blind detection times corresponding to the PDCCH candidates located in the first time unit are smaller than the difference between the maximum blind detection times corresponding to the first time unit and the first blind detection times, and it is determined that the PDCCH is not detected in the ue-specific search space set identified by j and the blind detection PDCCHs in the remaining ue-specific search space sets whose search space set identifiers are greater than j in the H ue-specific search space sets. The first blind detection times are the sum of blind detection times corresponding to PDCCH candidates located in the first time unit in the PDCCH candidates included in the K public search space sets; j 'is smaller than j, and j' is the search space set identifier with the minimum difference value with j in the H search space set identifiers corresponding to the H user equipment special search space sets. Optionally, for the ue-specific search space set, j is an integer greater than or equal to 1 and less than or equal to 39, j min And identifying the minimum search space set in the H search space sets special for the user equipment. For example, the network configures a user-specific search space set for the terminal, and obtains the user-specific search after sorting according to the sequence of the identifiers from small to largeThe search space set identifications of the cable space set are 2, 3, 5, 7, 9 respectively. If j takes a value of 7, the search space set identifier which is less than 7 and has the smallest difference with 7 is 5, and j' takes a value of 5.
And/or the terminal side equipment judges that the search space set identifier is k min Whether the number of non-overlapping CCEs included in a PDCCH candidate in the first time unit is greater than the difference between the maximum CCE quantity corresponding to the first time unit and the first CCE quantity in PDCCH candidates included in a ue-specific search space set identified by k in the ue-specific search space set to the search space set is determined. If the number of the search space sets is larger than the preset threshold, the search space set identifier in the H user equipment special search space sets is k min In the PDCCH candidates included in the ue-specific search space set to the search space set identified by k', if the number of non-overlapping CCEs included in the PDCCH candidate in the first time unit is smaller than the difference between the maximum CCE number corresponding to the first time unit and the first CCE number, determining that the PDCCH is not detected blindly in the ue-specific search space set identified by k in the search space set and in the remaining ue-specific search space sets whose search space set identifications are greater than k in the H ue-specific search space sets; the first CCE number is the sum of the number of non-overlapping CCEs included in PDCCH candidates located in the first time unit in the PDCCH candidates included in the K common search space sets; k 'is smaller than k, and k' is the search space set identifier with the minimum difference value with k in the H search space set identifiers corresponding to the H user equipment special search space sets. For example, the network configures a user-specific search space set for the terminal, and obtains search space set identifiers of the user-specific search space set as 2, 3, 5, 7, and 9 after the search space set identifiers are sorted from small to large. If k is 7, the search space set identifier which is less than 7 and has the minimum difference value with 7 is 5, and k' is 5;
and/or a user equipment specific search space identified as j for a search space set of the H user equipment specific search space setsThe terminal side equipment judges the search space set mark as j min In the PDCCH candidates included in the ue-specific search space set to the ue-specific search space set identified by j, the number of blind detections corresponding to the PDCCH candidate located in the first time unit is smaller than the difference between the maximum number of blind detections corresponding to the first time unit and the first number of blind detections, and the number of non-overlapping CCEs included in the PDCCH candidate located in the first time unit is smaller than the difference between the maximum number of CCEs corresponding to the first time unit and the first number of CCEs, and then the PDCCH is determined to be blind detected in the ue-specific search space set identified by j.
In a possible implementation manner, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to the first time unit of the N time units; l is an integer greater than or equal to N;
and different bit state values of the at least one bit corresponding to the first time unit indicate terminal operation corresponding to the terminal side device in the first time unit.
In a possible implementation manner, the first indication information is an index value, and a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit and indicates the corresponding terminal operation in the first time unit.
In a third aspect, an embodiment of the present application provides a blind detection method, including: the network side equipment determines first indication information; the first indication information is used for indicating at least one time unit of N time units; any one of the N time units is a first time unit, the first time unit of the N time units corresponds to a class of terminal operation, the terminal operation is prohibited to execute a first operation, a second operation and a third operation, or execute at least one of the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, any one of the N time units includes at least one symbol, and N is an integer greater than 0; the first operation is used for determining the blind detection times of the physical downlink control channel PDCCH in the current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit; and the network side equipment sends the first indication information to the terminal side equipment.
The network side equipment can indicate the type of each time unit through the first indication information, so that the terminal side equipment determines to execute only part of the first operation to the third operation in one time unit or does not execute the first operation to the third operation according to the type of each time unit, thereby reducing the overhead of blind detection of the PDCCH by the terminal side equipment and improving the blind detection efficiency.
In one possible implementation, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to the first time unit of the N time units; l is an integer greater than or equal to N;
and different bit state values of the at least one bit corresponding to the first time unit indicate terminal operation corresponding to the terminal side device in the first time unit.
In a possible implementation manner, the first indication information is an index value, and a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit and indicates the corresponding terminal operation in the first time unit.
In a fourth aspect, the present application provides an apparatus. The apparatus has a function of implementing the terminal side device according to the first to third aspects, for example, the apparatus includes a module, a unit, or a means (means) corresponding to the terminal side device performing the steps according to the first to third aspects, and the function, the unit, or the means (means) may be implemented by software, or implemented by hardware executing corresponding software.
In a possible design, the apparatus includes a processing unit and a transceiver unit, and functions performed by the processing unit and the transceiver unit may correspond to steps performed by the terminal-side device according to the first aspect to the third aspect.
In a possible design, the apparatus includes a processor, and may further include a transceiver, and the transceiver is configured to transmit and receive signals, and the processor executes program instructions to implement the method performed by the terminal-side device in any of the possible designs or implementations of the first to third aspects.
Wherein the apparatus may further comprise one or more memories for coupling with the processor. The one or more memories may be integrated with the processor or separate from the processor, which is not limited in this application.
In one possible approach, the memory stores the necessary computer program instructions and/or data to implement the functionality of the terminal-side device according to the first to third aspects. The processor may execute the computer program instructions stored in the memory to perform the method performed by the terminal side device in any possible design or implementation manner of the first aspect to the third aspect.
In a fifth aspect, the present application provides an apparatus. The apparatus has a function of implementing the network side device according to the first to third aspects, for example, the apparatus includes a module or a unit or a means (means) corresponding to the network side device executing the steps according to the first to third aspects. The functions or units or means (means) may be implemented by software, or by hardware executing corresponding software.
In a possible design, the apparatus includes a processing unit and a transceiver unit, and functions performed by the processing unit and the transceiver unit may correspond to steps performed by the network side device in any possible design or implementation manner of the first aspect to the third aspect.
In another possible design, the communication apparatus includes a processor, and may further include a transceiver, where the transceiver is configured to transmit and receive signals, and the processor executes program instructions to implement the method performed by the network side device in any possible design or implementation manner of the first aspect to the third aspect.
Wherein the apparatus may further comprise one or more memories for coupling with the processor. The one or more memories may be integrated with the processor or separate from the processor, which is not limited in this application.
In one possible implementation form, the memory stores necessary computer program instructions and/or data to implement the functions of the network side device involved in any of the possible designs or implementations of the first to third aspects. The processor may execute the computer program instructions stored in the memory to perform the method performed by the network side device in any possible design or implementation manner of the first aspect to the third aspect.
Embodiments of the present application provide a computer-readable storage medium, which stores computer-readable instructions, and when the computer-readable instructions are read and executed by a computer, the computer-readable instructions cause the computer to perform the method in any one of the above possible designs.
The embodiments of the present application provide a computer program product, which when read and executed by a computer, causes the computer to perform the method of any one of the above possible designs.
Embodiments of the present application provide a chip for reading and executing a software program stored in a memory to implement the method in any one of the above possible designs. Wherein, the memory is connected with the chip or the memory is arranged in the chip.
Drawings
Fig. 1 is a schematic diagram of a communication system suitable for use in the communication method of the embodiment of the present application;
fig. 2 is a schematic flowchart of a blind detection method according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a tti provided in an embodiment of the present application;
fig. 4 is a schematic diagram of a transmission time unit according to an embodiment of the present application;
fig. 5 is a schematic diagram of a transmission time unit according to an embodiment of the present application;
fig. 6 is a schematic diagram of a transmission time unit according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the drawings.
The embodiments of the present application can be applied to various mobile communication systems, for example: a New Radio (NR) system, a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an advanced Long Term Evolution (LTE) system, an LTE-a system, a UMTS (universal mobile telecommunications system), an LTE (evolved long term evolution) system, a future communication system, and other communication systems, and is not limited herein.
To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. Fig. 1 shows a schematic diagram of a communication system suitable for the communication method of the embodiment of the present application. As shown in fig. 1, the communication system 100 includes a network-side device 102 and a terminal-side device 106, where the network-side device 102 may be configured with multiple antennas, and the terminal-side device 106 may also be configured with multiple antennas.
In the embodiment of the present application, the terminal-side device is a device having a wireless transceiving function or a chip that can be disposed in the device. The device with wireless transceiving function may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a user agent, or a user equipment. In practical applications, the terminal-side device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety, a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. The device having the wireless transceiving function and the chip that can be provided in the device are collectively referred to as a terminal-side device in the present application.
In this embodiment, the network side device may be a wireless access device in various formats, such as an evolved Node B (eNB), a Radio Network Controller (RNC) or a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission and reception), a TRP or transmission point, TP), and the like, and may also be a gbb or a transmission point (TRP or TP) in a 5G (NR) system, and one or more antennas or antennas in a 5G (G) system, or a group of antennas (NBs) in a distributed system, such as a network-B, an eNB, a Radio Network Controller (RNC), or a base transceiver station controller (BSC), a Base Transceiver Station (BTS), a base transceiver station (BBU), or a radio network-B-TP), and the like.
The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person of ordinary skill in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems with the evolution of the network architecture and the occurrence of a new service scenario.
Referring to fig. 2, a schematic flow chart of a blind detection method provided in the embodiment of the present application is shown. The method comprises the following steps:
step 201: the network side equipment determines the first indication information.
In this embodiment of the present application, the first indication information may explicitly indicate an operation performed by the terminal-side device in each time unit, in this case, the first indication information is used to indicate at least one time unit (e.g., all N time units) of the N time units; any one of the N time units is a first time unit, the first time unit of the N time units corresponds to a class of terminal operation, the terminal operation is prohibited to execute a first operation, a second operation and a third operation, or execute at least one of the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, any one time unit of the N time units includes at least one symbol, and N is an integer greater than 0; wherein the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used to determine whether the number of blind detections for blind-detecting the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or to determine whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit.
In this embodiment of the present application, the first indication information may also implicitly indicate an operation performed by the terminal-side device in each time unit, in this case, the first indication information indicates N time units and a type of each time unit in the N time units; for a first time unit of the N time units, the type of the first time unit is used to instruct the terminal-side device to perform at least one of a first operation, a second operation, and a third operation in the first time unit, or not to perform the first operation, the second operation, and the third operation. The first time unit is any one of the N time units.
It should be noted that the number of the time units indicated by the first indication information may be greater than N, but only indicates which operations are performed by the terminal-side device in N of the time units, and other time units do not indicate, and at this time, the terminal-side device may perform blind detection in the time units in which operations are not indicated to be performed according to a method in the prior art.
Step 202: and the network side equipment sends the first indication information to the terminal side equipment.
Step 203: the terminal side equipment receives first indication information from the network side equipment.
Step 204: and the terminal side equipment determines the N time units according to the first indication information and executes the corresponding terminal operation in the first time unit of the N time units.
In the method, the terminal side device is instructed by the first indication information to perform at least one of the first operation, the second operation and the third operation or not to perform the first operation, the second operation and the third operation in any one time unit of the same transmission time unit. The terminal side equipment performs at least one of the three operations according to different time units (e.g., span) contained in the same transmission time unit (e.g., a slot in NR), on one hand, the operation is not performed according to the whole transmission time unit, and on the other hand, all the time units contained in the same transmission time unit may not perform the three operations (but may be at least one), so that the blind detection times of the terminal side equipment for determining the blind detection PDCCH and the resource consumption during the operations of determining the number of CCEs used for channel estimation on the PDCCH and the like can be reduced, and the complexity of the blind detection performed by the terminal side equipment is reduced.
In this embodiment, the network side device may divide one transmission time unit into a plurality of time units, where each time unit includes at least one symbol. The transmission time unit may refer to a timeslot in an NR system, or may refer to a subframe in an LTE system. The time unit described in the embodiment of the present application may be a span described in the current protocol, or may be a combination of at least two spans described in the protocol, or may be other types of time units, etc.; the symbol may refer to an Orthogonal Frequency Division Multiplexing (OFDM) symbol, or may refer to other types of symbols, which are not described herein again. For example, as shown in fig. 3, one transmission time unit includes 14 symbols, and the network side device divides the transmission time unit into 3 time units, which are time unit 1, time unit 2, and time unit 3.
It should be noted that span is a time unit specified in the current protocol, the length of each span is at least Y consecutive OFDM symbols, and Y is an integer greater than 0. For example, the network side device may indicate, through higher layer signaling (e.g., radio resource control signaling), whether the terminal side device supports at least X consecutive OFDM symbols between starting symbols of 2 spans, where the terminal side device has at least 1 PDCCH monitoring occasion in each of the 2 spans, and 1 PDCCH monitoring occasion is not at least 1 monitoring occasion in the downlink basic capability. Possible combinations of X and Y are (X, Y) = (7, 3) or (X, Y) = { (4, 3), (7, 3) } or (X, Y) = { (2, 2), (4, 3), (7, 3) }.
Currently, for any time unit in one transmission time unit, the terminal-side device needs to perform zeroth to third operations in one time unit:
zeroth operation, according to the method in the existing protocol, calculating the positions of CCEs included in PDCCH candidates located in the current time unit among all PDCCH candidates included in each search space set (search space set) monitored.
A first operation of determining a number of blind detections for blind-detecting a PDCCH in a current time unit.
The terminal side device may perform blind detection once in one PDCCH candidate, and if two PDCCH candidates satisfy the first preset condition, the terminal side device only needs to perform blind detection once in the two PDCCH candidates. Therefore, in order to improve the blind detection efficiency, the terminal-side device may first determine the number of PDCCH candidates satisfying the first preset condition, so as to determine the number of blind detections.
If the current time unit comprises a plurality of PDCCH candidates, aiming at any two PDCCH candidates, when the any two PDCCH candidates meet a first preset condition, the any two PDCCH candidates correspond to a blind detection time, and the terminal side equipment performs blind detection once in the any two PDCCH candidates; and when the any two PDCCH candidates do not meet the first preset condition, the any two PDCCH candidates correspond to two blind detection times, and the terminal side equipment performs blind detection twice in the any two PDCCH candidates. The first preset condition comprises the following contents:
CCE sets corresponding to the two PDCCH candidates are the same, namely the aggregation levels of the two PDCCH candidates are the same, and the starting CCE positions of the included CCEs are the same;
scrambling code sequences of the two PDCCH candidates are the same;
both PDCCH candidates are from the same Set of Control resources (CORESET);
the DCI length blindly detected by the terminal-side device in the two PDCCH candidates is the same.
With reference to the above description, if the first indication information indicates N time units, for a first time unit in the N time units, the first time unit is any time unit in the N time units, and when the terminal side device determines to perform the first operation in the first time unit according to the first indication information, the terminal side device may determine, according to a first preset condition, the number of blind detections for blindly detecting the PDCCH in the M PDCCH candidates in the first time unit; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0, and the terminal side device may determine, through a zeroth operation, the M PDCCH candidates included in the first time unit and a position of a CCE included in each PDCCH candidate.
A second operation of determining the number of non-overlapping CCEs used for channel estimation on the PDCCH in the current time unit.
Since the CCEs included in different PDCCH candidates may be overlapped, only one CCE may be used for channel estimation during channel estimation, and therefore, the terminal side device may determine the number of non-overlapping CCEs before performing channel estimation, thereby improving the efficiency of channel estimation.
For any two CCEs, under the condition that the any two CCEs are respectively from different PDCCH candidates, if the any two CCEs satisfy at least one of a second preset condition and a third preset condition, the any two CCEs are two non-overlapping CCEs, otherwise, the any two CCEs are one non-overlapping CCE.
Wherein, the second preset condition is that two CCEs are from different CORESETs; the third preset condition is that the time when the terminal side device blindly detects the PDCCH in the two PDCCH candidates corresponding to the two CCEs is different.
With reference to the above description, if the first indication information indicates N time units, for a first time unit in the N time units, the first time unit is any one time unit in the N time units, and when the terminal-side device determines to execute the second operation in the first time unit according to the first indication information, the terminal-side device may determine, according to a second preset condition and a third preset condition, the number of non-overlapping CCEs included in the M PDCCH candidates located in the first time unit.
A third operation of determining whether the number of blind detections for blind-detecting the PDCCH in the current time unit is greater than a maximum number of blind detections for the current time unit, and/or determining whether the number of the non-overlapping CCEs in the current time unit is greater than a maximum number of CCEs for the current time unit.
A PDCCH candidate set of one PDCCH may be referred to as a search space set, and the search space set may be divided into a common search space set (CSS set) and a user equipment specific search space set (USS set). CSS set has higher priority and USS set has lower priority than CSS set.
The network side equipment configures the blind detection times corresponding to the CSS sets and the maximum blind detection times corresponding to the number of the non-overlapping CCEs used for channel estimation and not more than one NR time slot and the maximum number of the corresponding CCEs, so that the UE is ensured not to discard any one CSS set after performing the first operation, the second operation and the third operation on all the CSS sets configured in 1 time slot, namely the UE performs the blind detection on the corresponding PDCCH and the channel estimation on the corresponding non-overlapping CCEs on all the CSS sets configured by the network side equipment in 1 time slot. Only the USS sets may be discarded after the first, second and third operations, i.e., the UE may not perform blind detection on 1 or more USS sets and channel estimation on corresponding non-overlapping CCEs.
If the first indication information indicates N time units, for a first time unit in the N time units, the first time unit is any one time unit in the N time units, and when the terminal side device determines to execute the third operation in the first time unit according to the first indication information, the terminal side device determines, according to a priority order of P search space sets configured by the network side device, whether the blind detection times corresponding to PDCCH candidates included in the i search space set are greater than the maximum blind detection times corresponding to the first time unit, for the i search space set in the P search space sets. i is an integer greater than or equal to 1 and less than or equal to P.
If the blind detection times corresponding to the PDCCH candidates located in the time unit are larger than the maximum blind detection times corresponding to the time unit in the PDCCH candidates from the 1 st search space set to the ith search space set, when the ith search space set is a user equipment dedicated search space set, determining that the PDCCH is not detected in the ith search space set in a blind manner; or, the terminal side device determines that, of PDCCH candidates included in the 1 st search space set to the i-th search space set, the number of non-overlapping CCEs included in the PDCCH candidate in the time unit is greater than the maximum CCE number corresponding to the time unit, and when the i-th search space set is a ue-specific search space set, it is determined that the PDCCH is not blindly detected in the i-th search space set.
When the terminal side device determines that the sum of the blind detection times of blind detection of all PDCCH candidates in the current time unit is greater than the maximum blind detection time corresponding to the current time unit, the terminal side device may delete the USS with the lowest priority, that is, blind detection is not performed in the PDCCH candidates included in the USS in the current time unit.
Or, when the terminal-side device determines that the number of non-overlapping CCEs used for channel estimation in the current time unit is greater than the maximum CCE number corresponding to the current time unit, the terminal-side device may delete the USS set with the lowest priority, that is, in the current time unit, perform channel estimation without using CCEs included in the PDCCH candidate included in the USS set, so as not to perform blind detection in the PDCCH candidate included in the USS.
It should be noted that the terminal-side device must blindly detect the PDCCH candidates included in the CSS set. The number of blind detection times determined by the second operation for the PDCCH candidates of all CSS sets in 1 time unit configured by the network side device to 1 terminal side device may not exceed the maximum number of blind detection times of the time unit, and the number of non-overlapping CCEs determined by the third operation for the PDCCH candidates of all CSS sets in 1 time unit configured by the network side device to 1 terminal side device may not exceed the maximum number of CCEs of the time unit.
When the terminal side device performs the third operation, the sequence of the USS set performing the judgment may be as follows:
judging according to the order from small to large of the USS set index; that is, the USS set index is the smallest, and then it is determined whether the number of blind detections corresponding to the PDCCH candidate included in the USS set is greater than the maximum number of blind detections corresponding to the current time unit, and whether the number of non-overlapping CCEs included in the PDCCH candidate included in the USS set is greater than the maximum number of CCEs corresponding to the current time unit.
The priority of the USS set based on non-slot scheduling (non-slot scheduling) is higher than that of the USS set based on slot scheduling, and the USS set based on non-slot scheduling is judged first. Based on all USS sets scheduled in non-slot, the USS set with the most monitoring opportunity is advanced and judged, namely the USS set with the most number of '1' in monitorngSymbolsWithinSlot in a high-level parameter searchSpace IE is preferentially entered and judged, or all digits of monitorngSymbolsWithinSlot sequences are summed, and the maximum preferentially entered and judged.
The USS set to which the high-priority DCI is scheduled among the USS sets is determined to be prioritized.
With reference to the above description, for example, the network-side device configures 4 search space sets, which are CSS #0, CSS #1, USS #1, and USS #2, for the terminal-side device; CSS #0, CSS #1 are common search space sets, and USS #1 and USS #2 are user equipment-specific search space sets. CSS #0 and CSS #1 bind CORESET #0, CORESET #0 occupies 2 symbols in the time domain and 24 RBs in the frequency domain. USS #1 binds CORESET #1, CORESET #1 occupies 3 symbols, and the frequency domain occupies 12 RBs. USS #2 binds CORESET #2, CORESET #2 occupies 1 symbol in time domain and 16 CCEs in frequency domain.
The terminal side equipment firstly executes the following steps:
with respect to CSS #0, the number of blind detections of PDCCH candidates in CSS #0 is determined to be 14 through the zeroth operation and the first operation. It is determined through the second operation that the PDCCH candidates in CSS #0 include 16 non-overlapping CCEs. CSS #0 occupies 8 CCEs on symbol #0, but 8 on symbol #7, and even though CSS #0 and CSS #1 are both bonded CORESET #0, it still accounts for 8+8=16 non-overlapping CCEs due to different listening occasions.
For CSS #1: the number of blind detections of PDCCH candidates in CSS #1 is determined to be 2 times by the zeroth operation and the first operation. It is determined through the second operation that the PDCCH candidates in CSS #1 include 16 non-overlapping CCEs. Because the CSS #1 occupies 8 CCEs on the symbol #0, the listening timing with the CSS #0 is on the symbol #0, and the sensing timings are bound to the CORESET #0 and completely overlap, the number of non-overlapping CCEs occupied by the CSS #1 is counted in the CSS #0, and the CSS #1 occupies 0.
The sum of blind detection times corresponding to CSS #0 and CSS #1 is counted to be 14+2=16 times, and the sum of occupied number of non-overlapped CCEs is counted to be 16. Assuming that the maximum blind detection number is 44 and the maximum CCE number is 56, the sum of the blind detection numbers occupied by CSS #0 and CSS #1 and the sum of the non-overlapping CCE numbers are removed from the maximum blind detection number and the maximum CCE number, respectively, and are used as the upper limit of the determination of USS #1 and USS #2, that is, the maximum blind detection number of USS #1 and USS #2 is 44-16=28 and the maximum CCE number is 56-16=40.
The terminal side equipment executes the step two again:
for USS #1, the number of blind detections of a PDCCH candidate in USS #1 is determined to be 16 times by the zeroth operation and the first operation. The PDCCH candidates in USS #1 are determined to occupy 12 non-overlapping CCEs by the second operation. USS #1 occupies 12 CCEs on symbol #0, and although it is on symbol #0 at the same listening timing as CSS #0 and CSS #1, USS #1 binds CORESET #1 and is different from CORESET #0, and thus 12 non-overlapping CCEs are calculated separately.
Through the third operation, it is determined that the number of blind detections of USS #1 is less than 28, and the number of non-overlapping CCEs corresponding to USS #1 is less than 40, so that the number of blind detections occupied by USS #1 and the number of non-overlapping CCEs are removed from the upper limit of judgment, that is, the maximum number of blind detections of USS #2 is 28-16=12, and the maximum number of CCEs is 40-12=28.
For USS #2: the number of blind detections of PDCCH candidates in USS #2 was determined to be 3 × 7=21 times by the zeroth operation and the first operation. It is determined by the second operation that PDCCH candidates in USS #2 occupy non-overlapping CCEs of 16 × 7= 102.
Through the third operation, the blind detection times corresponding to the USS #2 are determined to be more than 12, and the number of non-overlapping CCEs corresponding to the USS #2 is determined to be more than 28, so that the configuration of the USS #2 is deleted, and only the CSS #0, the CSS #1 and the USS #1 are monitored, namely, the PDCCHs are only detected in the CSS #0, the CSS #1 and the USS #1 in a blind mode.
In this embodiment, the network side device may configure the PDCCH candidates included in each time unit by the terminal side device, the maximum blind detection times corresponding to each time unit, and the maximum CCE number corresponding to each time unit. The maximum CCE number may be used as the number of non-overlapping CCEs used for channel estimation in the prior art. The prior art defines the maximum blind detection times and the maximum CCE number within 1 NR slot, and the terminal side device always performs 4 operations, namely, the zeroth operation, the first operation, the second operation, and the third operation according to the slot granularity of NR. In the embodiment of the present application, the terminal-side device performs at least one of the first operation, the second operation, and the third operation, or does not perform these three operations, within the granularity of a time unit (e.g., 2 spans) included in the same transmission time unit (e.g., one NR slot). Alternatively, the length of the time unit included in one transmission time unit may be equal to the length of the transmission time unit, and the terminal-side device may further perform some operations of the first operation, the second operation, and the third operation according to an instruction of the network-side device on the basis of performing the zeroth operation, where all three operations are not always performed at the granularity of the transmission time unit. Optionally, the length of the time unit included in one transmission time unit does not exceed the length of this transmission time unit, and the terminal side device may further perform some operations in the first operation, the second operation, and the third operation according to the instruction of the network side device on the basis of performing the zeroth operation, but not always perform all three operations at the granularity of the time unit included in this transmission time unit. The number of time units included in one transmission time unit may be predefined by a protocol, or configured to the terminal-side device by the network-side device through a high-layer signaling. For example, an NR slot including 14 OFDM symbols may include 2 time units each having a length of 7 OFDM symbols, or 2 time units each having a length of 6 OFDM symbols and 8 OFDM symbols, or 1 time unit including 14 OFDM symbols, or 14 time units each having a length of 1 OFDM symbol.
As a possible implementation, the maximum blind detection times and the corresponding maximum CCE numbers for different time units may be the same or different. For example, taking the transmission time unit as an NR slot as an example, the maximum blind detection number B and the maximum CCE number C within 1 slot. The 1 time slot may be divided into 4 time units, time units A1, A2, A3 and A4. The maximum blind detection times B1 corresponding to the time unit A1, and the maximum CCE number C1. Similarly, the maximum number of blind detections B2 and the maximum number of CCEs C2 for time element A2, the maximum number of blind detections B3 and the maximum number of CCEs C3 for time element A3, the maximum number of blind detections B4 and the maximum number of CCEs C4 for time element A4. Alternatively, B1 equals B2 equals B3 equals B4, or the relationship between B1, B2, B3 and B4 is not limited. Optionally, C1 is equal to C2 and equal to C3 and equal to C4, and the sum of C1, C2, C3, and C4 is less than or equal to C. Optionally, the relationship among C1, C2, C3, and C4 is not limited, and the sum of C1, C2, C3, and C4 is less than or equal to C.
As a possible implementation manner, the sum of the maximum blind detection times corresponding to different time units is less than or equal to the maximum blind detection times corresponding to 1 time slot, and the sum of the maximum CCE numbers corresponding to different time units is less than or equal to the maximum CCE number corresponding to 1 time slot. For example, the maximum blind detection number B and the maximum CCE number C within 1 slot. The 1 timeslot is divided into 4 time units, A1, A2, A3 and A4 respectively. The maximum blind detection times B1 corresponding to the time unit A1 and the maximum CCE number C1. Similarly, the maximum number of blind detections B2 for time element A2, and the maximum number of CCEs C2, the maximum number of blind detections B3 for time element A3, and the maximum number of CCEs C3, the maximum number of blind detections B4 for time element A4, and the maximum number of CCEs C4. The sum of B1, B2, B3 and B4 is less than or equal to B, and the sum of C1, C2, C3 and C4 is less than or equal to C.
Or the maximum blind detection times B1 or B corresponding to 1 or more (including 2) time units of the first operation, the second operation and the third operation executed by the UE i When the sum of i is more than or equal to 1 and is less than or equal to B, the terminal side equipment executes the maximum CC corresponding to 1 or more time units of the first operation, the second operation and the third operationE number C1 or C i And the sum of i is more than or equal to 1 and is less than or equal to C. For example, the maximum blind detection number B and the maximum CCE number C in 1 slot, where 1 slot is divided into 4 time units, time unit A1, time unit A2, time unit A3, and time unit A4. The network side equipment instructs the UE to execute the first operation, the second operation and the third operation on the time unit A1 and the time unit A3, and at least one operation but not all operations of the first operation, the second operation and the third operation are executed on the time unit A2 and the time unit A4. The sum of B1 and B3 is less than or equal to B, and the sum of C1 and C3 is less than or equal to C.
The above B1, B2, B3, B4, C1, C2, C3, C4, B and C may be a value fixed by a protocol, or may be a value related to UE capability. The UE reports a maximum blind detection capability value and a maximum CCE number capability value to the network through a high-level signaling (e.g., an RRC signaling), where the maximum blind detection capability value and the maximum CCE number capability value may be a maximum blind detection capability value and a maximum CCE number capability value corresponding to 1 time slot, may also be a maximum blind detection capability value and a maximum CCE number capability value corresponding to a certain time unit, and may also be a maximum blind detection capability value and a maximum CCE number capability value corresponding to a plurality of time units, respectively, for example, the maximum blind detection capability value B1 and the maximum CCE number capability value C1 corresponding to a certain time unit are bound to the reported capability value, and/or a maximum blind detection capability value B2 and a maximum CCE number capability value C2 corresponding to another time unit are bound to the reported capability value, and so on.
In a possible implementation manner, if none of the PDCCH candidates configured by the network side device in a time unit satisfies the first preset condition, the network side device may instruct the terminal side device not to perform the first operation in the time unit, so as to reduce the complexity of blind detection of the terminal side device.
In a possible implementation manner, if in a time unit, CCEs included in PDCCH candidates configured by the network side device in the time unit all satisfy at least one of the second preset condition and the third preset condition, the network side device may instruct the terminal side device not to perform the second operation in the time unit, thereby reducing the complexity of blind detection by the terminal side device.
In a possible implementation manner, if, in a time unit, the number of blind detections corresponding to the PDCCH candidate configured by the network side device in the time unit is less than or equal to the maximum blind detection number corresponding to the time unit, and the number of non-overlapping CCEs used for channel estimation by the terminal side device in the time unit is configured to be less than or equal to the maximum CCE number corresponding to the time unit, the network side device may instruct the terminal side device not to perform the third operation in the time unit, thereby reducing the complexity of blind detection by the terminal side device.
In a possible implementation manner, in a certain time unit of at least one time unit in which the terminal-side device needs to perform the first operation, the second operation, and the third operation, the protocol specifies that the network configuration has the same CSS set and/or USS set, or that all search space sets for non-slot-granularity-based scheduling (e.g., per-time-unit-granularity scheduling included in one slot, or combined-granularity scheduling including multiple time units) of the network configuration have the same configuration, or that all search space sets for slot-granularity-based scheduling of the network configuration have the same configuration.
In combination with the above description, in this embodiment, the network side device may configure the PDCCH candidates, so that the terminal side device only performs part of the operations from the first operation to the third operation in a time unit, or does not perform the first operation to the third operation, thereby reducing the overhead of blind PDCCH detection by the terminal side device and improving the blind detection efficiency.
In the embodiment of the present application, there may be multiple implementation manners of the first indication information.
In a first implementation manner, the first indication information may be a bitmap, and the network side device may send the bitmap through high-layer signaling, so as to indicate an operation performed by the terminal side device in each of the N time units.
When the first indication information may be a bitmap, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to one time unit of the N time units; l is an integer greater than or equal to N.
For a first time unit of the N time units, the first time unit is any one of the N time units, and different values of at least one bit of the L bits corresponding to the first time unit indicate the terminal-side device to perform at least one of the first operation, the second operation, and the third operation in the first time unit, or not perform the first operation, the second operation, and the third operation.
It should be noted that, in the N time units, the position of each time unit in the transmission time unit and the number of included symbols may be preset. For example, a transmission time unit includes 14 symbols, and may be pre-divided into 2 time units, where the first time unit occupies the first 7 symbols of the transmission time unit, and the second time unit occupies the last 7 symbols of the transmission time unit. At this time, the first indication information only needs to indicate the operation performed by the terminal-side device in each time unit.
In this implementation, the position of each time unit in the transmission time unit and the number of included symbols in the N time units may also be indicated by the first indication information. How to indicate in detail, the embodiments of the present application do not limit this. For example, the first indication information may indicate the positions of the time units 1 to 4 and the number of included symbols by 14 bits, for example, the 14 bits take values of 0000, 1111, 000, 111, which means that the time unit 1 includes symbols 0 to 3, the time unit 2 includes symbols 4 to 7, the time unit 3 includes symbols 8 to 10, and the time unit 4 includes symbols 11 to 13. Of course, the above is only an example, and other situations may exist, and are not described again.
In a second implementation manner, in this embodiment of the application, the type of each time unit and different types of time units may also be preset, and the terminal-side device needs to perform different operations.
In the embodiment of the present application, there may be a plurality of implementation manners for the correspondence between the type of the time unit and the operation executed by the terminal-side device. For example, since the zeroth operation is an operation that must be performed, the first to third operations are optional operations, and the correspondence between different types of time units and the operations performed by the terminal-side device can be as shown in table 1.
TABLE 1
Figure BDA0002017470470000151
In table 1, "×" indicates that the terminal-side device does not need to perform the corresponding operation in the time unit of the type, and "√" indicates that the terminal-side device needs to perform the corresponding operation in the time unit of the type. For example, with reference to table 1, the terminal-side device performs a first operation, a second operation, and a third operation in a first class of time unit; the terminal side equipment executes a third operation in the second type time unit; the terminal side equipment executes a second operation in a third type time unit; the terminal side equipment executes the second operation and the third operation in a fourth type time unit; the terminal-side device does not perform the first operation, the second operation, and the third operation in the fifth type time unit. Table 1 is an example, and there may be other types of time units, and there may be a correspondence between the types of the time units and the operations executed by the terminal-side device, and there may also be other forms, which are not illustrated one by one here.
In this implementation, the first indication information may be a bitmap, and the operation performed by the terminal-side device in each time unit may be indicated by indicating the type of each time unit through the bitmap.
In one possible implementation, if there are only one type of time unit or two types of time units, a 1-bit bitmap may be used to indicate the location and type of the time unit, for example, "0" in the bitmap indicates a first type of time unit, "1" indicates a second type of time unit, or "1" indicates a first type of time unit and "0" indicates a second type of time unit.
For example, as shown in fig. 4, a tti includes 14 symbols, symbol 0 to symbol 13, and can be divided into 4 time units, time unit 1 to time unit 4, time unit 1 includes symbol 0 to symbol 3, time unit 2 includes symbol 4 to symbol 7, time unit 3 includes symbol 8 to symbol 10, and time unit 4 includes symbol 11 to symbol 13. If there are only two types of time cells: a first type of time cell and a second type of time cell. Referring to fig. 4, as shown in fig. 5, when the time units 1 to 4 respectively correspond to the first-type time unit, the second-type time unit, the first-type time unit, and the second-type time unit, the first indication information may include 14 bits, and when the first indication information indicates the above-described time unit, values may be as follows: 0000 1111 000 111. Wherein, the bit with 0 represents the symbol included in the first type time unit; the bit with the value 1 represents the symbol comprised by the time cell of the second type.
In another possible implementation, if more than two types of time units are included, each type of time unit corresponds to 1 bitmap, which respectively indicates which symbols are included in 1 transmission time unit of the type of time unit.
For example, if there are four types: a first class time unit performing a first operation and a third operation; a second type time unit performing a second operation and a third operation; a third type time unit for executing the first operation, the second operation and the third operation; and the fourth type time unit does not execute the first operation, the second operation and the third operation. As shown in fig. 4, a tti includes 14 symbols, respectively, from symbol 0 to symbol 13, and can be divided into 4 time units, respectively, from time unit 1 to time unit 4, where time unit 1 includes symbol 0 to symbol 3, time unit 2 includes symbol 4 to symbol 7, time unit 3 includes symbol 8 to symbol 10, and time unit 4 includes symbol 11 to symbol 13. When the time units 1 to 4 respectively correspond to the first-class time unit, the third-class time unit, the second-class time unit, and the fourth-class time unit, and the indication is performed by using the first indication information, the first indication information may include 4 rows of bits, each row of bits includes 14 bits, which is specifically shown as follows: first row: 1111 0000 000; a second row: 0000 0000 111 000; third row: 0000 1111 000; a second row: 0000 0000 000 111. In the first row, a bit with a value of 1 represents a symbol occupied by the first type time unit; in the second row, the bit with the value of 1 represents the symbol occupied by the second type time unit; in the third row, a bit with a value of 1 represents a symbol occupied by the third type of time unit; in the fourth row, a bit with a value of 1 represents a symbol occupied by the time unit of the fourth type.
It should be noted that, in the N time units, the position of each time unit in the transmission time unit and the number of included symbols may be preset. In combination with the above example, two bits can be used to indicate the above four types, 00, 01, 10, 11 sequentially indicate the time units of the first type to the time units of the fourth type. When the time units 1 to 4 respectively correspond to the first type time unit, the third type time unit, the second type time unit, and the fourth type time unit, and the indication is performed by using the first indication information, the bit map corresponding to the first indication information may be 00 1001 11.
In a third implementation manner, a plurality of patterns may also be preset, where each pattern indicates a type of each time unit, or indicates an operation performed by the terminal-side device in each time unit, for example, at least one of the first operation, the second operation, and the third operation is performed, or the first operation, the second operation, and the third operation are not performed. Each pattern may also indicate the location of each time unit in the transmission time unit and the number of symbols included. Of course, the position of each time unit in the transmission time unit and the number of included symbols may also be preset, and need not be indicated.
In this implementation, the first indication information may be an index value, and the index value corresponds to a preset pattern.
For example, if there are only two types of time cells: first type time cells and second type time cells, denoted a and B, respectively, the first type time cells comprising 3 consecutive OFDM symbols and the second type time cells comprising 2 consecutive OFDM symbols, when a transmission time cell comprises 14 OFDM symbols, different combinations of these two types of time cells within 1 transmission time cell may form the pattern shown in table 2.
TABLE 2
Index value Pattern(s)
0 BBABBA
1 ABBABB
2 BABBAB
In table 2, the index value is 0, the corresponding pattern includes 6 time units, which are time unit 1 to time unit 6, and the corresponding time unit types are: the time unit comprises a second type time unit, a first type time unit, a second type time unit and a first type time unit. When 14 OFDM symbols included in a transmission time unit are OFDM symbol 1 to OFDM symbol 14, time unit 1 includes OFDM symbol 1 to OFDM symbol 2, time unit 2 includes OFDM symbol 3 to OFDM symbol 4, time unit 3 includes OFDM symbol 5 to OFDM symbol 7, time unit 4 includes OFDM symbol 8 to OFDM symbol 9, time unit 5 includes OFDM symbol 10 to OFDM symbol 11, and time unit 6 includes OFDM symbol 12 to OFDM symbol 14. The meaning of the pattern corresponding to the index value 1 and the index value 2 can refer to the description herein, and is not repeated. With reference to table 1, the terminal-side device may perform the first operation, the second operation, and the third operation in the first type time unit, and may perform the third operation in the second type time unit.
In this case, when the first instruction information received by the terminal-side device is 0, it may be determined that the third operation is performed in time unit 1, time unit 2, time unit 4, and time unit 5; the first operation, the second operation, and the third operation are performed in time cell 3 and time cell 6. Other cases will not be described in detail.
In a possible implementation, the first indication information may also be a specific location or time unit or a plurality of specific locations or a plurality of time units in one time slot specified by the protocol. For example, the protocol provides for performing the first, second, and third operations only in the first three symbols, or the protocol provides for performing the first, second, and third operations in a time unit in which a common search space is located, or the protocol provides for performing the first, second, and third operations in a time unit in which a set of search spaces based on time slot scheduling is configured, or the protocol provides for performing the first, second, and third operations in a time unit in which a set of search spaces based on non-time slot scheduling is configured.
In a possible implementation manner, the first indication information may also indicate, at the same time, an operation performed by the terminal-side device in each of the plurality of transmission time units. For example, in conjunction with the above description, if there are only two types of time cells: a first type of time cell comprising 3 consecutive OFDM symbols and a second type of time cell comprising 2 consecutive OFDM symbols, wherein the different combinations of the two types of time cells within 4 or 5 transmission time cells may form the pattern shown in table 3, when a transmission time cell comprises 14 OFDM symbols, are denoted as a and B, respectively.
TABLE 3
Figure BDA0002017470470000171
In one possible implementation, 1 table or at least one pattern may be predefined, each row within the predefined table indicating a combination of possible different types of time cells within 1 transmission time cell and the corresponding position; at least one pattern represents a combination of possible different types of time units within 1 transmission time unit and the corresponding position. The network side device reconfigures 1 transmission table to the terminal side device, each line of the transmission table represents the possible different types of time unit combination of a plurality of transmission time units, and the combined elements come from at least 1 line configuration in a predefined table or at least one pattern.
For example, the protocol predefines 1 table 4, where the table 4 comprises at least 1 row, each row defining the corresponding locations of different types of time cells within 1 transmission time cell, assuming that 2 different time cell combination patterns are defined. The network side device configures 1 table 5 to the terminal side device through high-level signaling, and each row of this table 5 defines possible combinations of different types of time units in at least a plurality of slots. The network side equipment sends 1 index value to the terminal side equipment through high-layer signaling or physical layer signaling to indicate different types of time unit combinations in a plurality of transmission time units of the terminal side equipment. The terminal side device performs table lookup in a table 5 configured by the network side device according to the index value to determine a combination pattern of different types of time units of the plurality of transmission time units.
TABLE 4
Index value Pattern(s)
0 BBABBA，ABBABB
1 ABBABB，BBABBA
TABLE 5
Index value Pattern(s)
0 000000000000000
1 111111111111111
2 101010101010101
3 010101010101010
It should be noted that, in this embodiment of the application, the first indication information may indicate only the terminal operation performed by the terminal-side device in a part of the N time units, and the terminal operation performed in another part of the N time units may be implicitly indicated. For example, there are only two types of time cell cases: the network side equipment only indicates the position of the first type time unit, and the rest symbols are the positions of the second type time unit. Similarly, there are only three types of time units, the first type of time unit, the second type of time unit, and the third type of time unit. The network side device may only indicate the location of the second type time cell, where the first type time cell is a symbol before the location of the second type time cell, and the third type time cell is a symbol after the location of the second type time cell.
In another possible implementation manner, the terminal operation corresponding to the terminal-side device in the first time unit may not be indicated by the network-side device through the first indication information, and may be a correspondence between a position of a time unit preset for the protocol and a type of the time unit. The terminal side device can determine the type of the time unit according to the position of the time unit, so that the terminal operation executed in the time unit is obtained according to the preset corresponding relation.
Therefore, optionally, the network-side device indicates, in the first indication information, the terminal operation corresponding to each time unit respectively.
In the above implementation manner, the first indication information may be indicated with one transmission time unit as granularity, that is, the first indication information indicates that it is not a specific transmission time unit, and in N time units of each transmission time unit, the terminal side device may perform a corresponding operation according to the first indication information. In this embodiment of the application, the network-side device may further determine a plurality of consecutive transmission time units, determine an operation that the terminal-side device needs to perform in each time unit of each transmission time unit of the plurality of consecutive transmission time units, and indicate the operation through the second indication information.
Since at least one of the period, offset, and duration of the multiple search space sets configured by the network side device may be different, frequencies of the multiple search space sets that collide in the same transmission time unit may also be different, and thus different PDCCH candidate patterns may be formed. For example, the transmission time unit is slot, as shown in fig. 6. CSSset #0 has a period of 4, i.e. occurs once every 4 slots, CSSset #1 has a period of 10, i.e. occurs 1 time every 10 slots, USS set #1 has a period of 2, i.e. occurs 1 time every 2 slots, and USS set #2 has a period of 1, i.e. occurs 1 time every 1 slot. There are 5 different patterns, namely 5 different PDCCH candidate patterns, in which different search space sets collide with the same slot. The protocol restricts the number of PDCCH candidate patterns configured by the network side device not to exceed N, or restricts the number of candidate patterns that need to execute a PDCCH mapping rule (mapping rule) not to exceed M, where M may be less than or equal to N. Wherein, performing the PDCCH mapping rule (mapping rule) may refer to performing zeroth to third operations.
Possibly, the network side device may notify the terminal side device that PDCCH mapping rule is needed on 1 of N different PDCCH candidate patterns by means of a bitmap or a predefined or higher layer signaling configuration table, and adding a semi-static configuration or a group common (group common) indication of the network side device.
Possibly, in the method, the network side device does not need to send any indication information to the terminal side device, and the network side device ensures that the processing capacity of the terminal side device, such as the storage capacity and the calculation capacity of the terminal side device, is not exceeded. Or, the terminal side device reports a capability to notify the network side device that several different PDCCH alternative patterns can be processed, and the network side device performs corresponding configuration on the terminal side device according to the capability reported by the terminal side device, so as to ensure that the processing complexity does not exceed the capability reported by the terminal side device.
For example: the number of the PDCCH candidate patterns configured by the network side device is 5, and the number of the PDCCH candidate patterns that need to be configured as the PDCCH mapping rule is 3, that is, the PDCCH candidate patterns 1, 3, and 5 need to be slots of the PDCCH mapping rule, and the other slot network side devices ensure that the CCEs of the configured PDCCH candidate are not overlapped, and may only need to do operation 3 or not.
In fig. 6, the network side device configures PDCCH candidate patterns for all slots of the terminal side device. By the method, when RRC is configured/reconfigured, a transition time can be used for calculating the PDCCH mapping rule, and then the calculation result is stored. The terminal side equipment does not need to perform PDCCH mapping rule one by one to perform selective mapping of PDCCH candidates, so that the processing complexity of the terminal side equipment can be reduced, namely, the terminal side equipment only executes the zeroth operation to the third operation for 1 time in the first period, and other periods only need to read the result executed in the first period.
Fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus may be configured to perform the actions of the terminal side device in the foregoing method embodiments, where the communication apparatus 700 includes: a transceiving unit 701 and a processing unit 702.
A processing unit 702, configured to determine first indication information;
the first indication information is used for indicating N time units and for indicating a terminal-side device to perform at least one of a first operation, a second operation and a third operation in each of the N time units, or not to perform the first operation, the second operation and the third operation, wherein the N time units belong to the same transmission time unit, each of the N time units comprises at least one symbol, and N is an integer greater than 0; the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit;
a transceiving unit 701, configured to send the first indication information to the terminal side device.
In one possible implementation, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to the first time unit of the N time units; l is an integer greater than or equal to N;
and different bit state values of the at least one bit corresponding to the first time unit indicate terminal operation corresponding to the terminal side equipment in the first time unit.
In a possible implementation manner, the first indication information is an index value, and a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit and indicates the corresponding terminal operation in the first time unit.
Fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device shown in fig. 8 may be a hardware circuit implementation of the communication device shown in fig. 7. The communication device may be adapted to the flowchart shown in fig. 2 to perform the functions of the network device in the above-described method embodiment. For ease of illustration, fig. 8 shows only the main components of the communication device. Optionally, the communication device may be a network device, or may be a device in a network device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other circuit structures and/or discrete devices. Optionally, taking the communication apparatus as a network device as an example, as shown in fig. 8, the communication apparatus 800 includes a processor 801, a memory 802, a transceiver 803, an antenna 804, and the like.
A processor 801 for determining first indication information;
the first indication information is used for indicating N time units and for indicating a terminal-side device to perform at least one of a first operation, a second operation and a third operation in each of the N time units, or not to perform the first operation, the second operation and the third operation, wherein the N time units belong to the same transmission time unit, each of the N time units comprises at least one symbol, and N is an integer greater than 0; the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used to determine whether the number of blind detections for blind-detecting the PDCCH in a current time unit is greater than a maximum number of blind detections for the current time unit, and/or to determine whether the number of non-overlapping CCEs in the current time unit is greater than a maximum number of CCEs for the current time unit;
a transceiver 803, configured to send the first indication information to the terminal-side device.
In one possible implementation, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to the first time unit of the N time units; l is an integer greater than or equal to N;
and different bit state values of the at least one bit corresponding to the first time unit indicate terminal operation corresponding to the terminal side device in the first time unit.
In a possible implementation manner, the first indication information is an index value, and a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit and indicates the corresponding terminal operation in the first time unit.
Fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus may be configured to perform the actions of the terminal side device in the above method embodiments, where the communication apparatus 900 includes: a transceiving unit 901 and a processing unit 902.
A transceiver 901, configured to receive first indication information from a network side device;
the first indication information is used for indicating at least one time unit of N time units; any one of the N time units is a first time unit, the first time unit of the N time units corresponds to a class of terminal operation, the terminal operation is prohibited to execute a first operation, a second operation and a third operation, or execute at least one of the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, any one of the N time units includes at least one symbol, and N is an integer greater than 0;
the first operation is used for determining the blind detection times of the physical downlink control channel PDCCH in the current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit;
a processing unit 902, configured to determine the N time units according to the first indication information, and execute the corresponding terminal operation in a first time unit of the N time units.
In one possible design, when the corresponding terminal operation includes the first operation, the terminal-side device performs the first operation in the first time unit according to the first indication information, including:
the terminal side equipment determines the blind detection times of the PDCCH in the M PDCCH candidates of the first time unit according to a first preset condition; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0;
if any two PDCCH candidates in the M PDCCH candidates meet a first preset condition, the any two PDCCH candidates correspond to one blind detection time, otherwise, the any two PDCCH candidates correspond to two blind detection times.
In one possible design, when the corresponding terminal operation includes the second operation, the terminal-side device performs the second operation in the first time unit according to the first indication information, including:
the terminal side equipment determines the number of non-overlapping CCEs included in the M PDCCH candidates in the first time unit according to a second preset condition and a third preset condition; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0;
wherein, for any two CCEs in the M PDCCH candidates, if the any two CCEs are respectively from different PDCCH candidates, if the any two CCEs satisfy at least one of the second preset condition and the third preset condition, then the any two CCEs are two non-overlapping CCEs, otherwise, the any two CCEs are one non-overlapping CCE.
In one possible design, for a first time unit of the N time units, when the first indication information is used to indicate the terminal-side device to perform the third operation in the first time unit, the terminal-side device performs the third operation in the first time unit according to the first indication information, including:
the terminal side device executes the following operations for the ith search space set in the P search space sets according to the priority order of the P search space sets configured by the network side device:
the terminal side equipment judges whether the blind detection times corresponding to the PDCCH candidates located in the first time unit are greater than the maximum blind detection times corresponding to the first time unit in the PDCCH candidates from the 1 st search space set to the i th search space set, and if so, determines not to blindly detect the PDCCH in the i th search space set; i is an integer greater than or equal to 1 and less than or equal to P;
or, the terminal side device determines whether the number of non-overlapping CCEs included in PDCCH candidates located in the first time unit is greater than the maximum CCE number corresponding to the first time unit, among PDCCH candidates included in 1 st to i-th search space sets, and if so, determines not to blindly detect the PDCCH in the i-th search space set;
or, the terminal side device determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of blind detections corresponding to the PDCCH candidate located in the first time unit is less than or equal to the maximum blind detection number corresponding to the first time unit, and determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of non-overlapping CCEs included in the PDCCH candidate located in the first time unit is less than or equal to the maximum CCE number corresponding to the first time unit, and then determines to blindly detect the PDCCH in the i-th search space set.
In a possible implementation manner, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to the first time unit of the N time units; l is an integer greater than or equal to N;
and different bit state values of the at least one bit corresponding to the first time unit indicate terminal operation corresponding to the terminal side device in the first time unit.
In a possible implementation manner, the first indication information is an index value, a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit, and indicates the corresponding terminal operation in the first time unit.
Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device shown in fig. 10 may be a hardware circuit implementation of the communication device shown in fig. 9. The communication device may be adapted to the flowchart shown in fig. 2, and perform the functions of the terminal side device in the above method embodiment. For ease of illustration, fig. 10 shows only the main components of the communication device. Optionally, the communication device may be a terminal-side device, or may be a device in the terminal-side device, such as a chip or a chip system, where the chip system includes at least one chip, and the chip system may further include other circuit structures and/or discrete devices. Alternatively, taking the communication apparatus as a network device as an example, as shown in fig. 10, the communication apparatus 900 includes a processor 1001, a memory 1002, a transceiver 1003, an antenna 1004, and an input/output apparatus 1005. The processor 1001 is mainly used for processing the communication protocol and the communication data, controlling the whole wireless communication apparatus, executing the software program, and processing data of the software program, for example, for supporting the wireless communication apparatus to perform the actions described in the above method embodiments. The memory 1002 is primarily used to store software programs and data. The transceiver 1003 is mainly used for converting baseband signals and rf signals and processing rf signals. The antenna 1004 is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. An input/output device 1005, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.
A transceiver 1003, configured to receive first indication information from a network side device;
the first indication information is used for indicating N time units and for indicating a terminal side device to execute at least one of a first operation, a second operation and a third operation in each time unit of the N time units, or not execute the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, each time unit of the N time units comprises at least one symbol, and N is an integer greater than 0; the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used to determine whether the number of blind detections for blind-detecting the PDCCH in a current time unit is greater than a maximum number of blind detections for the current time unit, and/or to determine whether the number of non-overlapping CCEs in the current time unit is greater than a maximum number of CCEs for the current time unit;
a processor 1001, configured to perform an operation indicated by the first indication information in each of the N time units.
In one possible design, when the corresponding terminal operation includes the first operation, the processor 1001 is specifically configured to:
determining blind detection times for blind detection of the PDCCH in the M PDCCH candidates of the first time unit according to a first preset condition; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0;
if any two PDCCH candidates in the M PDCCH candidates meet a first preset condition, the any two PDCCH candidates correspond to one blind detection time, otherwise, the any two PDCCH candidates correspond to two blind detection times.
In one possible design, when the corresponding terminal operation includes the second operation, the processor 1001 is specifically configured to:
the terminal side equipment determines the number of non-overlapping CCEs included in the M PDCCH candidates in the first time unit according to a second preset condition and a third preset condition; the M PDCCH candidates are configured by the network side device in the first time unit, where M is an integer greater than 0;
wherein, for any two CCEs in the M PDCCH candidates, if the any two CCEs are respectively from different PDCCH candidates, if the any two CCEs satisfy at least one of the second preset condition and the third preset condition, the any two CCEs are two non-overlapping CCEs, otherwise, the any two CCEs are one non-overlapping CCE.
In one possible design, for a first time unit of the N time units, when the first indication information is used to instruct the terminal-side device to perform the third operation in the first time unit, the processor 1001 is specifically configured to:
according to the priority sequence of the P search space sets configured by the network side equipment, aiming at the ith search space set in the P search space sets, the following operations are executed:
judging whether the blind detection times corresponding to the PDCCH candidates located in the first time unit in the PDCCH candidates from the 1 st search space set to the ith search space set are greater than the maximum blind detection times corresponding to the first time unit, and if so, determining that the PDCCH is not detected in the ith search space set in a blind manner; i is an integer greater than or equal to 1 and less than or equal to P;
or, judging whether the number of non-overlapping CCEs included in a PDCCH candidate located in the first time unit is greater than the maximum CCE number corresponding to the first time unit, among PDCCH candidates included in 1 st to i-th search space sets, and if so, determining that the PDCCH is not blindly detected in the i-th search space set;
or, determining that, of PDCCH candidates included in the 1 st to i-th search space sets, blind detection times corresponding to PDCCH candidates located in the first time unit are less than or equal to the maximum blind detection times corresponding to the first time unit, and if the terminal side device determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of non-overlapping CCEs included in PDCCH candidates located in the first time unit is less than or equal to the maximum CCE number corresponding to the first time unit, determining to blindly detect the PDCCH in the i-th search space set.
In a possible implementation manner, the first indication information includes L bits, and at least one bit of the L bits uniquely corresponds to the first time unit of the N time units; l is an integer greater than or equal to N;
and different bit state values of the at least one bit corresponding to the first time unit indicate terminal operation corresponding to the terminal side device in the first time unit.
In a possible implementation manner, the first indication information is an index value, and a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit and indicates the corresponding terminal operation in the first time unit.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (35)

1. A blind detection method, comprising:
the method comprises the steps that terminal side equipment receives first indication information from network side equipment;
the first indication information is used for determining at least one time unit of N time units; the method comprises the steps that one time unit in N time units is a first time unit, the first time unit corresponds to a class of terminal operation, the class of terminal operation is that the first operation, the second operation and the third operation are not executed, the N time units belong to the same transmission time unit, each time unit in the N time units comprises at least one symbol, and N is an integer larger than 0;
the first operation is used for determining the blind detection times of the physical downlink control channel PDCCH in the current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used to determine whether the number of blind detections for blind-detecting the PDCCH in a current time unit is greater than a maximum number of blind detections for the current time unit, and/or to determine whether the number of non-overlapping CCEs in the current time unit is greater than a maximum number of CCEs for the current time unit;
and the terminal side equipment determines the N time units according to the first indication information, and executes the corresponding terminal operation in the first time unit of the N time units.
2. The method of claim 1, further comprising:
the terminal side device performs another kind of terminal operation in another time unit of the N time units, the another kind of terminal operation including at least one of the first operation, the second operation, and the third operation.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
and the terminal side equipment determines the class of terminal operation corresponding to the first time unit according to the position of the first time unit in the N time units.
4. The method according to claim 2, wherein the other class of terminal operation comprises the first operation, and the terminal side device performs the first operation in the other time unit, comprising:
the terminal side equipment determines blind detection times for blind detection of the PDCCH in the M PDCCH candidates of the other time unit according to a first preset condition; the M PDCCH candidates are configured by the network side device in the other time unit, where M is an integer greater than 0;
and if any two PDCCH candidates in the M PDCCH candidates meet a first preset condition, the any two PDCCH candidates correspond to one blind detection time, otherwise, the any two PDCCH candidates correspond to two blind detection times.
5. The method according to claim 4, wherein the first preset condition comprises:
CCE sets corresponding to the two PDCCH candidates are the same;
scrambling code sequences of the two PDCCH candidates are the same;
the two PDCCH candidates are from the same control resource set CORESET;
and the length of the downlink control information DCI blindly detected in the two PDCCH candidates by the terminal side equipment is the same.
6. The method according to claim 1, 2 or 5, wherein the other kind of terminal operation comprises the second operation, and the terminal-side device performs the second operation in the other time unit, including:
the terminal side equipment determines the number of non-overlapping CCEs included in the M PDCCH candidates in the other time unit according to a second preset condition and a third preset condition; the M PDCCH candidates are configured by the network side device in the other time unit, where M is an integer greater than 0;
wherein, for any two CCEs in the M PDCCH candidates, if the any two CCEs are respectively from different PDCCH candidates, if the any two CCEs satisfy at least one of the second preset condition and the third preset condition, the any two CCEs are two non-overlapping CCEs, otherwise, the any two CCEs are one non-overlapping CCE.
7. The method according to claim 6, wherein the second preset condition is that two CCEs are from different sets of control resources, CORESET;
the third preset condition is that the time when the terminal side device blindly detects the PDCCH in the two PDCCH candidates corresponding to the two CCEs is different.
8. The method according to claim 1 or 2 or 5 or 7, wherein the other class of terminal operation comprises the third operation, and the terminal side device performs the third operation in the other time unit, comprising:
the terminal side device executes the following operations for the ith search space set in the P search space sets according to the priority order of the P search space sets configured by the network side device:
the terminal side device judges whether the blind detection times corresponding to the PDCCH candidates located in the other time unit in the PDCCH candidates from the 1 st search space set to the i th search space set are greater than the maximum blind detection times corresponding to the other time unit, and if so, determines not to blindly detect the PDCCH in the i th search space set; i is an integer greater than or equal to 1 and less than or equal to P;
or, the terminal side device determines whether the number of non-overlapping CCEs included in a PDCCH candidate located in the other time unit, among PDCCH candidates included in the 1 st search space set to the i th search space set, is greater than the maximum CCE number corresponding to the other time unit, and if so, determines not to blindly detect the PDCCH in the i th search space set;
or, the terminal side device determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of blind detections corresponding to a PDCCH candidate located in the other time unit is less than or equal to the maximum blind detection number corresponding to the other time unit, and determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of non-overlapping CCEs included in a PDCCH candidate located in the other time unit is less than or equal to the maximum CCE number corresponding to the other time unit, it determines that the PDCCH is blind detected in the i-th search space set.
9. The method of claim 1, 2, 5 or 7, wherein the first indication information comprises L bits, at least one of the L bits uniquely corresponding to the first time unit of the N time units; l is an integer greater than or equal to N;
and the bit state value of the at least one bit corresponding to the first time unit indicates that the terminal side equipment operates in the class of terminals corresponding to the first time unit.
10. The method according to claim 1, 2, 5 or 7, wherein the first indication information is an index value, a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit, and indicates the class of terminal operation corresponding to the first time unit.
11. The method according to claim 1 or 2 or 5 or 7, characterized in that each of the N time units is a new radio span NR span; the transmission time unit is a new wireless time slot NR slot.
12. A blind detection method, comprising:
the network side equipment determines first indication information;
the first indication information is used for determining at least one time unit of N time units; one time unit in the N time units is a first time unit, the first time unit corresponds to a class of terminal operations, the class of terminal operations is that the first operation, the second operation and the third operation are not executed, the N time units belong to the same transmission time unit, each time unit in the N time units comprises at least one symbol, and N is an integer greater than 0;
the first operation is used for determining the blind detection times of the physical downlink control channel PDCCH in the current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit;
and the network side equipment sends the first indication information to terminal side equipment.
13. The method of claim 12, further comprising:
and the network side equipment determines another type of terminal operation corresponding to another time unit in the N time units, wherein the another type of terminal operation comprises at least one operation of the first operation, the second operation and the third operation.
14. The method according to claim 12 or 13, characterized in that the method further comprises:
and the network side equipment determines the class of terminal operation corresponding to the first time unit according to the position of the first time unit in the N time units.
15. The method according to claim 12 or 13, wherein the first indication information comprises L bits, at least one bit of the L bits uniquely corresponding to the first time unit of the N time units; l is an integer greater than or equal to N;
and the bit state value of the at least one bit corresponding to the first time unit indicates that the terminal side equipment operates in the class of terminals corresponding to the first time unit.
16. The method according to claim 12 or 13, wherein the first indication information is an index value, a pattern corresponding to the index value indicates positions of the N time units in the transmission time unit, and indicates the class of terminal operation corresponding to the first time unit.
17. The method according to claim 12 or 13, characterized in that each of said N time units is a new radio span NR span; the transmission time unit is a new wireless NR slot.
18. A blind detection device, comprising:
the receiving and sending unit is used for receiving first indication information from the network side equipment;
the first indication information is used for determining at least one time unit of N time units; the method comprises the steps that one time unit in N time units is a first time unit, the first time unit corresponds to a class of terminal operation, the class of terminal operation is that the first operation, the second operation and the third operation are not executed, the N time units belong to the same transmission time unit, each time unit in the N time units comprises at least one symbol, and N is an integer larger than 0;
wherein the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit;
and the processing unit is used for determining the N time units according to the first indication information and executing the class of terminal operation in the first time unit of the N time units.
19. The apparatus of claim 18, wherein the processing unit is further configured to perform another class of terminal operation in another time unit of the N time units, and wherein the another class of terminal operation comprises at least one of the first operation, the second operation, and the third operation.
20. The apparatus according to claim 18 or 19, wherein the processing unit is further configured to determine the class of terminal operation corresponding to the first time unit according to the location of the first time unit in the N time units.
21. The apparatus according to claim 19, wherein the another class of terminal operations includes the first operation, and the processing unit is specifically configured to:
determining the blind detection times of the PDCCH in the M PDCCH candidates of the other time unit according to a first preset condition; the M PDCCH candidates are configured by the network side device in the other time unit, where M is an integer greater than 0;
and if any two PDCCH candidates in the M PDCCH candidates meet a first preset condition, the any two PDCCH candidates correspond to one blind detection time, otherwise, the any two PDCCH candidates correspond to two blind detection times.
22. The apparatus according to claim 21, wherein the another class of terminal operation includes the second operation, and the processing unit is specifically configured to:
determining the number of non-overlapping CCEs included in the M PDCCH candidates located in the other time unit according to a second preset condition and a third preset condition; the M PDCCH candidates are configured by the network side device in the other time unit, where M is an integer greater than 0;
wherein, for any two CCEs in the M PDCCH candidates, if the any two CCEs are respectively from different PDCCH candidates, if the any two CCEs satisfy at least one of the second preset condition and the third preset condition, the any two CCEs are two non-overlapping CCEs, otherwise, the any two CCEs are one non-overlapping CCE.
23. The apparatus according to claim 18 or 19, wherein the another class of terminal operations comprises the third operation, and the processing unit is specifically configured to:
according to the priority order of the P search space sets configured by the network side equipment, aiming at the ith search space set in the P search space sets, the following operations are executed:
judging whether the blind detection times corresponding to the PDCCH candidates located in the other time unit in the PDCCH candidates from the 1 st search space set to the ith search space set are larger than the maximum blind detection times corresponding to the other time unit, and if so, determining that the PDCCH is not detected blindly in the ith search space set; i is an integer greater than or equal to 1 and less than or equal to P;
or, judging whether the number of non-overlapping CCEs included in the PDCCH candidate located in the other time unit is greater than the maximum CCE number corresponding to the other time unit, among the PDCCH candidates included in the 1 st search space set to the i-th search space set, and if so, determining that the PDCCH is not blindly detected in the i-th search space set;
or, determining that, of PDCCH candidates included in the 1 st to i-th search space sets, blind detection times corresponding to PDCCH candidates located in the other time unit are less than or equal to a maximum blind detection time corresponding to the other time unit, and if the terminal side device determines that, of PDCCH candidates included in the 1 st to i-th search space sets, the number of non-overlapping CCEs included in PDCCH candidates located in the other time unit is less than or equal to a maximum CCE number corresponding to the other time unit, determining to blindly detect the PDCCH in the i-th search space set.
24. The apparatus according to claim 18 or 19, wherein the first indication information comprises L bits, at least one of the L bits uniquely corresponding to the first time unit of the N time units; l is an integer greater than or equal to N;
and the bit state value of the at least one bit corresponding to the first time unit indicates that the terminal side equipment operates in the class of terminals corresponding to the first time unit.
25. The apparatus according to claim 18 or 19, wherein the first indication information is an index value, and the pattern corresponding to the index value indicates the positions of the N time units in the transmission time unit and indicates the corresponding class of terminal operation in the first time unit.
26. The apparatus according to claim 18 or 19, wherein each of the N time units is a new radio span NR span; the transmission time unit is a new wireless time slot NR slot.
27. A blind detection device, comprising:
a processing unit for determining first indication information;
the first indication information is used for determining at least one time unit of N time units; wherein one time unit of the N time units is a first time unit, the first time unit corresponds to a class of terminal operation, the class of terminal operation is not to perform the first operation, the second operation and the third operation, the N time units belong to the same transmission time unit, each time unit of the N time units comprises at least one symbol, and N is an integer greater than 0;
wherein the first operation is used for determining blind detection times of a Physical Downlink Control Channel (PDCCH) in a current time unit; a second operation for determining the number of non-overlapping control channel elements, CCEs, used for channel estimation of the PDCCH in a current time unit; the third operation is used for determining whether the number of blind detections for blind detection of the PDCCH in the current time unit is greater than the maximum number of blind detections for the current time unit, and/or determining whether the number of non-overlapping CCEs in the current time unit is greater than the maximum number of CCEs for the current time unit;
and the transceiver unit is used for sending the first indication information to the terminal side equipment.
28. The apparatus of claim 27, wherein the processing unit is further configured to determine another class of terminal operation corresponding to another time unit of the N time units, and wherein the another class of terminal operation comprises at least one of the first operation, the second operation, and the third operation.
29. The apparatus according to claim 27 or 28, wherein the processing unit is further configured to determine the class of terminal operation corresponding to the first time unit according to a location of the first time unit in the N time units.
30. The apparatus according to claim 27 or 28, wherein the first indication information comprises L bits, at least one of the L bits uniquely corresponding to the first time unit of the N time units; l is an integer greater than or equal to N;
and the bit state value of the at least one bit corresponding to the first time unit indicates the terminal side equipment to operate in the class of terminal corresponding to the first time unit.
31. The apparatus according to claim 27 or 28, wherein the first indication information is an index value, and the pattern corresponding to the index value indicates positions of the N time units in the transmission time unit and indicates the corresponding class of terminal operation in the first time unit.
32. The apparatus according to claim 27 or 28, wherein each of the N time units is a new radio span NR span; the transmission time unit is a new wireless NR slot.
33. A blind detection apparatus comprising a processor coupled to a memory:
the processor to execute a computer program or instructions stored in the memory to cause the apparatus to perform the method of any of claims 1 to 11.
34. A blind detection apparatus comprising a processor coupled to a memory:
the processor to execute a computer program or instructions stored in the memory to cause the apparatus to perform the method of any of claims 12 to 17.
35. A readable storage medium, comprising a program or instructions which, when executed, perform the method of any one of claims 1 to 17.
CN201910268022.9A 2019-03-29 2019-04-03 Blind detection method and device Active CN111756512B (en)

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BR112021019440A BR112021019440A2 (en) 2019-03-29 2020-03-28 Blind detection method and apparatus
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US9185716B2 (en) * 2013-01-03 2015-11-10 Samsung Electronics Co., Ltd. Obtaining control channel elements of physical downlink control channels for cross-carrier scheduling

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