WO2018228573A1 - 信号传输方法、相关装置及系统 - Google Patents

信号传输方法、相关装置及系统 Download PDF

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Publication number
WO2018228573A1
WO2018228573A1 PCT/CN2018/091682 CN2018091682W WO2018228573A1 WO 2018228573 A1 WO2018228573 A1 WO 2018228573A1 CN 2018091682 W CN2018091682 W CN 2018091682W WO 2018228573 A1 WO2018228573 A1 WO 2018228573A1
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WIPO (PCT)
Prior art keywords
resource
control channel
physical downlink
candidate physical
downlink control
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PCT/CN2018/091682
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English (en)
French (fr)
Inventor
焦淑蓉
张鹏
唐浩
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华为技术有限公司
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Priority to BR112019026869-3A priority Critical patent/BR112019026869A2/pt
Priority to JP2019569678A priority patent/JP6905095B2/ja
Priority to EP18817496.5A priority patent/EP3634056B1/en
Publication of WO2018228573A1 publication Critical patent/WO2018228573A1/zh
Priority to US16/714,364 priority patent/US11251912B2/en

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    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H04W28/0263—Traffic management, e.g. flow control or congestion control per individual bearer or channel involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a signal transmission method, related apparatus, and system.
  • CORESET control resource set
  • a CORESET corresponds to a group of users, and the physical downlink control channel (PDCCH) of the group of users is sent on the CORESET.
  • PDCCH physical downlink control channel
  • each user has a search space whose time-frequency resource is less than or equal to the time-frequency resource of the CORESET.
  • a parameter represents an attribute of a time-frequency resource, and includes a set of parameters, such as a time domain scheduling interval, a subcarrier spacing, a symbol duration, a cyclic prefix (CP) length, and the like.
  • different Numerology associated CORESETs correspond to a group of users of different service attributes.
  • the CORESET associated with Numerology3 corresponds to a set of URLLC users, and the set of URLLC users sends a PDCCH in the CORESET associated with Numerology3.
  • the URLLC service can preempt other Numerology-associated resources (such as resources carrying eMBB services). As shown in FIG. 1B, when the URLLC service preempts resources on the first few symbols of other Numerology-associated resources, the CORESET associated with the Numerology3 may conflict with the CORESET associated with other Numerology, which may result in some (some) users.
  • the available PDCCH resources are not found in the search space to transmit the control information corresponding to the URLLC service.
  • the CORESET associated with the URLLC is always limited to a smaller frequency range, so that the CORESET associated with the URLLC is arbitrary.
  • the symbol does not try to conflict with the CORESET associated with the URLLC.
  • This resource configuration is not flexible.
  • the application provides a signal transmission method, a related device and a system, and can implement flexible configuration of control channel parameters.
  • the present application provides a signal transmission method, which is applied to a network device side, where the method includes: the network device configuring at least two sets of control channel parameters for the terminal, and then sending the first configuration information to the terminal, where the first configuration
  • the information includes the at least two sets of control channel parameters.
  • each of the at least two sets of control channel parameters corresponds to at least one time unit.
  • the present application provides a signal transmission method, which is applied to a terminal side, the method includes: receiving, by a terminal, first configuration information from a network device, and then determining, according to an index of a time unit and the first configuration information, The control channel parameter corresponding to the time unit represented by the index.
  • the first configuration information may include at least two sets of control channel parameters configured by the network device. Wherein each of the at least two sets of control channel parameters corresponds to at least one time unit.
  • the terminal may select appropriate control channel parameters for the time unit(s) from at least two sets of control channel parameters configured by the network device, thereby implementing flexible configuration of control channel parameters.
  • control channel parameter corresponding to each of the multiple time units determined by the network device may be a control channel parameter that specifies a Numerology association.
  • the designated Numerology may be referred to as a first Numerology.
  • the first Numerology may be a Numerology that matches the URLLC service, or may be other designated Numerology, which is not limited in this application.
  • the network device determines respective control channel parameters corresponding to the plurality of time units according to known resource scheduling conditions on the plurality of time units.
  • the resource scheduling situation on a time unit may include whether there are other Numerology associated CORESETs on the time unit or whether there is a blank resource or a common channel (such as a synchronization channel SCH, a broadcast channel BCH, an uplink random access channel).
  • Resources used by UL-RACH may be referred to as a first resource.
  • the network device can determine the control channel parameters corresponding to each time unit according to the respective resource scheduling conditions on the multiple time units, and try to avoid the CORESET and the first resource associated with the first Numerology on the multiple time units. conflict.
  • the terminal can select an appropriate control channel parameter for the time unit(s) currently carrying the service. It can be understood that, because the network device has pre-configured the control channel parameters corresponding to the multiple time units, the terminal can determine the time unit(s) directly according to the first configuration information sent by the network device. Corresponding control channel parameters. Moreover, on the time unit(s), the first Numerology associated CORESET does not conflict or minimize conflict with the first resource.
  • the first Numerology matching service such as the URLLC service
  • the first configuration information may have the following two presentation modes: 1. One time unit index corresponds to one set of control channel parameters; 2. One set of control channel parameters corresponds to multiple time unit indexes.
  • the first configuration information may indicate control channel parameters corresponding to each time unit, although the control channel parameters corresponding to some time units are the same. That is to say, the network device can configure the control channel parameters corresponding to each symbol.
  • the first configuration information may uniformly indicate control channel parameters corresponding to multiple symbols with the same resource scheduling condition, without repeatedly indicating the same control channel parameters in the multiple symbols.
  • the second presentation mode can save signaling overhead.
  • control channel parameters involved in the present application may include at least one of the following:
  • mapping mode continuous mapping or decentralized mapping between a control channel element (CCE) and a resource element group (REG) in a control resource set (CORESET);
  • mapping manner between the candidate physical downlink control channel (PDCCH candidate) and the CCE continuous mapping or distributed mapping
  • the manner in which the candidate physical downlink control channel (PDCCH candidate) of different aggregation levels (AL) shares resources (basic nesting mode or packet nesting mode).
  • the resources of the CORESET are different, and the control channel parameters are different.
  • the mapping between CCE and REG in CORESET is different, and the control channel parameters are different.
  • the mapping between PDCCH candidate and CCE in CORESET is different, and the control channel parameters are different.
  • the mapping between PDCCH candidate and CCE in CORESET is different, and the control channel parameters are different.
  • the PDCCH candidates of different aggregation levels in the CORESET share different resources, and the control channel parameters are different.
  • by adjusting the control channel parameters collisions can be avoided as much as possible, and the frequency diversity gain can be improved.
  • the network device can determine the resource location of the CORESET on the time unit based on whether there is a first resource on the time unit.
  • the specific strategy is as follows:
  • the ratio of the frequency domain span of the CORESET on the time unit in the full bandwidth may be greater than the first threshold (eg, 80%), that is, the CORESET may occupy as much bandwidth as possible.
  • the value of the first threshold is not limited in this application, and may be determined according to actual application requirements.
  • CORESET is distributed over the frequency domain outside the first resource on the time unit.
  • the resource location corresponding to the control resource set may include a resource start location and a resource end location corresponding to the control resource set.
  • the first configuration information may also include a resource start location corresponding to the control resource set and a frequency domain span and a time domain span corresponding to the control resource set.
  • the control channel parameters may also include other information that may be used to indicate the resource location of the control resource set, which is not limited herein.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device may determine, according to whether there is a first resource on the time unit, how to map the REG to the CCE in the CORESET on the time unit.
  • the specific strategy is as follows:
  • the REGs contained in the CCE in the CORESET are centrally distributed.
  • the size of the REG bundle in the CCE may indicate whether the network device is configured with the control channel parameter corresponding to the first type of policy or the control channel parameter corresponding to the second type of policy. It can be understood that in the NR system, when the REG bundle contains 6 REGs, the REGs in the CCE are centrally distributed. When a REG bundle contains 2 or 3 REGs, the REGs in the CCE are distributed.
  • the mapping manner of the REG to the CCE may include the number of REGs included in the REG bundle in the CCE, that is, the number of the second resource groups included in the second group of resource groups.
  • the first configuration information may also include other information that can be used to indicate the CCE and REG mapping manner, which is not limited herein.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device may determine, according to whether there is a first resource on the time unit, a mapping manner of CCE to PDCCH in the CORESET on the time unit.
  • the specific strategy is as follows:
  • the CCEs contained in the PDCCH in the CORESET are centrally distributed.
  • the CCE to PDCCH mapping manner may include that the candidate physical downlink control channel corresponds to the first resource group that is consecutive in the L frequency domains, or the candidate physical downlink control channel is corresponding to the L frequency domain.
  • the first resource group may include L.
  • L is a positive integer indicating the aggregation level of the candidate physical downlink control channel.
  • the control channel parameters may also include other information that can be used to indicate the mapping manner of the CCE to the PDCCH, which is not limited herein.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device may determine, according to whether there is a first resource on the time unit, the time-frequency resource used by the PDCCH candidate of different aggregation levels in the CORESET on the time unit.
  • the location that is, the resource sharing mode adopted by the PDCCH candidate of different aggregation levels in the CORESET on the time unit.
  • the second resource sharing mode adopted by the PDCCH candidate of different aggregation levels in the CORESET If there is no first resource on a time unit, then on the time unit, the second resource sharing mode adopted by the PDCCH candidate of different aggregation levels in the CORESET. In this way, the blocking probability can be reduced.
  • the first resource sharing mode adopted by the PDCCH candidate of different aggregation levels in the CORESET can be multiplexed to a greater extent.
  • the first resource sharing manner is as follows: time-frequency resources used by PDCCH candidates of different aggregation levels are overlapped as much as possible. That is, the position of the time-frequency resource used by all the PDCCH candidates of different aggregation levels is part or all of the position of the time-frequency resource used by the PDCCH candidate of the aggregation type that occupies the most resources.
  • the foregoing second resource sharing manner is: dividing all PDCCH candidates of different aggregation levels into two or more groups.
  • the first resource sharing method described above is adopted in each group.
  • control channel parameters may specifically include a resource (eg, CCE) index in the set of control resources, and a candidate physical downlink control channel of one or more aggregation levels mapped on the resource.
  • a resource eg, CCE
  • the terminal can analyze the location of resources used by PDCCH candidates of different aggregation levels, and finally determine which resource sharing mode is adopted by PDCCH candidates of different aggregation levels.
  • the control channel parameter may also include other information that may be used to indicate the resource sharing manner adopted by the PDCCH candidate of different aggregation levels, which is not limited herein.
  • control channel parameter may specifically include: the indication information of the first resource sharing manner or the indication information of the foregoing second resource sharing manner.
  • a flag indicating a resource sharing manner is set in the first configuration information. When the flag bit is "1”, the first resource sharing mode described above is indicated. When the flag bit is "0”, the second resource sharing mode is indicated.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the present application provides a network device, which may include a plurality of functional modules for respectively performing the method provided by the first aspect, or any one of the possible implementation manners of the first aspect. The method provided.
  • the present application provides a terminal, which may include a plurality of functional modules for respectively performing the method provided by the second aspect, or provided by any one of the possible implementations of the second aspect. method.
  • the present application provides a network device for performing the signal transmission method described in the first aspect.
  • the network device can include a memory and a processor, transceiver coupled to the memory, wherein the transceiver is for communicating with other communication devices, such as terminals.
  • the memory is for storing implementation code of a signal transmission method described in the first aspect
  • the processor is for executing program code stored in the memory, that is, performing the method provided by the first aspect, or a possible implementation of the first aspect The method provided by any of the modes.
  • the present application provides a terminal for performing the signal transmission method described in the second aspect.
  • the terminal can include a memory and a processor, transceiver coupled to the memory, wherein the transceiver is for communicating with other communication devices, such as network devices.
  • the memory is for storing implementation code of the signal transmission described in the second aspect
  • the processor is for executing program code stored in the memory, that is, performing the method provided by the second aspect, or a possible implementation of the second aspect Any of the methods provided.
  • a communication system comprising: a network device and a terminal, wherein:
  • the network device is configured to configure at least two sets of control channel parameters for the terminal, and then send the first configuration information to the terminal, where the first configuration information includes the at least two sets of control channel parameters.
  • each of the at least two sets of control channel parameters corresponds to at least one time unit.
  • the terminal is configured to receive first configuration information from the network device, and then determine, according to an index of the time unit and the first configuration information, a control channel parameter corresponding to an index of the time unit.
  • the network device may be the network device described in the third aspect or the fifth aspect.
  • the terminal may be the terminal described in the fourth aspect or the sixth aspect.
  • a computer readable storage medium having instructions thereon, when executed on a computer, causing the computer to perform the signal transmission method described in the first aspect above.
  • a ninth aspect there is provided another computer readable storage medium having instructions stored thereon that, when run on a computer, cause the computer to perform the signal transmission method described in the second aspect above.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the signal transmission method described in the first aspect above.
  • FIG. 1A is a schematic diagram of resources of a hybrid Numerology scenario involved in the present application.
  • FIG. 1B is a schematic diagram of resource conflicts of a hybrid Numerology scenario involved in the present application.
  • FIG. 2 is a schematic diagram of resource mapping for resolving resource conflicts in a hybrid Numerology scenario in the prior art
  • FIG. 3 is a schematic structural diagram of a wireless communication system according to the present application.
  • FIG. 4 is a schematic diagram of a hardware architecture of a terminal provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a hardware architecture of a base station according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a control resource set involved in the present application.
  • 7A-7B are schematic diagrams showing mapping relationships between search spaces, candidate physical downlink control channels, control channel elements, and resource element groups according to the present application;
  • 8A-8B are schematic diagrams of two methods for indicating control channel parameters provided by the present application.
  • 9A-9C are schematic diagrams of policies for configuring control channel parameters provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a policy for configuring control channel parameters according to another embodiment of the present application.
  • FIG. 11 is a schematic diagram of a policy for configuring control channel parameters according to still another embodiment of the present application.
  • 12A-12B are schematic diagrams of policies for configuring control channel parameters according to still another embodiment of the present application.
  • FIGS. 13A-13B are schematic diagrams of policies for configuring control channel parameters according to still another embodiment of the present application.
  • 14A-14B are schematic diagrams of policies for configuring control channel parameters according to still another embodiment of the present application.
  • 15 is a functional block diagram of a wireless communication system, a terminal, and a network device provided by the present application.
  • FIG. 3 shows a wireless communication system to which the present application relates.
  • the wireless communication system may be a Long Term Evolution (LTE) system, or may be a future evolution of the 5th Generation (5G) system, a new air interface (NR) system, and machine-to-machine communication ( Machine to Machine, M2M) system, etc.
  • LTE Long Term Evolution
  • 5G 5th Generation
  • NR new air interface
  • M2M machine-to-machine communication
  • M2M Machine to Machine
  • the network device 101 can be a base station, and the base station can be used for communicating with one or more terminals, and can also be used for communicating with one or more base stations having partial terminal functions (such as a macro base station and a micro base station, such as an access point, Communication between).
  • the base station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or may be an evolved base station in an LTE system (Evolutional Node B). , eNB), and base stations in 5G systems, new air interface (NR) systems.
  • the base station may also be an Access Point (AP), a TransNode (Trans TRP), a Central Unit (CU), or other network entity, and may include some or all of the functions of the above network entities. .
  • Terminals 103 may be distributed throughout wireless communication system 100, either stationary or mobile.
  • terminal 103 may be a mobile device, a mobile station, a mobile unit, an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, and the like.
  • network device 101 can be used to communicate with terminal 103 over wireless interface 105 under the control of a network device controller (not shown).
  • the network device controller may be part of the core network 115 or may be integrated into the network device 101.
  • the network device 101 can be configured to transmit control information or user data to the core network 115 through a blackhaul interface 113 (such as an S1 interface).
  • the network device 101 and the network device 101 can also communicate with each other directly or indirectly through a blackhaul interface 111 (such as an X2 interface).
  • the wireless communication system 100 shown in FIG. 3 is only for the purpose of more clearly explaining the technical solutions of the present application, and does not constitute a limitation of the present application.
  • Those skilled in the art may know that with the evolution of the network architecture and new services, The appearance of the scenario, the technical solution provided by the present application is equally applicable to similar technical problems.
  • the terminal 200 may include: one or more terminal processors 201, a memory 202, a communication interface 203, a receiver 205, a transmitter 206, a coupler 207, an antenna 208, a user interface 202, and an input and output module. (including audio input and output module 210, key input module 211, display 212, etc.). These components can be connected by bus 204 or other means, and FIG. 4 is exemplified by a bus connection. among them:
  • Communication interface 203 can be used by terminal 200 to communicate with other communication devices, such as network devices.
  • the network device may be the network device 300 shown in FIG. 5.
  • the communication interface 203 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a 5G or a future communication interface of a new air interface.
  • LTE Long Term Evolution
  • 5G Fifth Generation
  • the terminal 200 may be configured with a wired communication interface 203, such as a Local Access Network (LAN) interface.
  • LAN Local Access Network
  • Transmitter 206 can be used to perform transmission processing, such as signal modulation, on signals output by terminal processor 201.
  • Receiver 205 can be used to perform reception processing, such as signal demodulation, on the mobile communication signals received by antenna 208.
  • transmitter 206 and receiver 205 can be viewed as a wireless modem.
  • the number of the transmitter 206 and the receiver 205 may each be one or more.
  • the antenna 208 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • the coupler 207 is configured to divide the mobile communication signal received by the antenna 208 into multiple channels and distribute it to a plurality of receivers 205.
  • the terminal 200 may also include other communication components such as a GPS module, a Bluetooth module, a Wireless Fidelity (Wi-Fi) module, and the like. Not limited to the above-described wireless communication signals, the terminal 200 can also support other wireless communication signals such as satellite signals, short-wave signals, and the like. Not limited to wireless communication, the terminal 200 may also be configured with a wired network interface (such as a LAN interface) to support wired communication.
  • a wired network interface such as a LAN interface
  • the input and output module can be used to implement the interaction between the terminal 200 and the user/external environment, and can include the audio input and output module 210, the key input module 211, the display 212, and the like. Specifically, the input and output module may further include: a camera, a touch screen, a sensor, and the like. The input and output modules communicate with the terminal processor 201 through the user interface 209.
  • Memory 202 is coupled to terminal processor 201 for storing various software programs and/or sets of instructions.
  • memory 202 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 202 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as ANDROID, IOS, WINDOWS, or LINUX.
  • the memory 202 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the memory 202 can also store a user interface program, which can realistically display the content of the application through a graphical operation interface, and receive user control operations on the application through input controls such as menus, dialog boxes, and keys. .
  • the memory 202 can be used to store an implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 200 side.
  • the signal transmission method provided by one or more embodiments of the present application please refer to the subsequent embodiments.
  • Terminal processor 201 can be used to read and execute computer readable instructions. Specifically, the terminal processor 201 can be used to invoke a program stored in the memory 212, such as the implementation of the signal transmission method provided by one or more embodiments of the present application on the terminal 200 side, and execute the instructions contained in the program.
  • the terminal 200 can be the terminal 103 in the wireless communication system 100 shown in FIG. 3, and can be implemented as a mobile device, a mobile station, a mobile unit, a wireless unit, a remote unit, and a user agent. , mobile client and more.
  • the terminal 200 shown in FIG. 4 is only one implementation of the embodiment of the present application. In an actual application, the terminal 200 may further include more or less components, which are not limited herein.
  • network device 300 can include one or more network device processors 301, memory 302, communication interface 303, transmitter 305, receiver 306, coupler 307, and antenna 308. These components can be connected via bus 304 or other types, and FIG. 5 is exemplified by a bus connection. among them:
  • Communication interface 303 can be used by network device 300 to communicate with other communication devices, such as terminal devices or other network devices.
  • the terminal device may be the terminal 200 shown in FIG. 4.
  • the communication interface 303 may be a Long Term Evolution (LTE) (4G) communication interface, or may be a 5G or a future communication interface of a new air interface.
  • LTE Long Term Evolution
  • the network device 300 may also be configured with a wired communication interface 303 to support wired communication.
  • the backhaul link between one network device 300 and other network devices 300 may be a wired communication connection.
  • Transmitter 305 can be used to perform transmission processing, such as signal modulation, on signals output by network device processor 301.
  • Receiver 306 can be used to perform reception processing on the mobile communication signals received by antenna 308. For example, signal demodulation.
  • transmitter 305 and receiver 306 can be viewed as a wireless modem. In the network device 300, the number of the transmitter 305 and the receiver 306 may each be one or more.
  • the antenna 308 can be used to convert electromagnetic energy in a transmission line into electromagnetic waves in free space, or to convert electromagnetic waves in free space into electromagnetic energy in a transmission line.
  • Coupler 307 can be used to divide the mobile pass signal into multiple channels and distribute it to multiple receivers 306.
  • Memory 302 is coupled to network device processor 301 for storing various software programs and/or sets of instructions.
  • memory 302 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the memory 302 can store an operating system (hereinafter referred to as a system) such as an embedded operating system such as uCOS, VxWorks, or RTLinux.
  • the memory 302 can also store a network communication program that can be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices.
  • the network device processor 301 can be used to perform wireless channel management, implement call and communication link establishment and teardown, and provide cell handover control and the like for users in the control area.
  • the network device processor 301 may include: an Administration Module/Communication Module (AM/CM) (a center for voice exchange and information exchange), and a Basic Module (BM) (for Complete call processing, signaling processing, radio resource management, radio link management and circuit maintenance functions), code conversion and sub-multiplexer (TCSM) (for multiplexing demultiplexing and code conversion functions) )and many more.
  • AM/CM Administration Module/Communication Module
  • BM Basic Module
  • TCSM code conversion and sub-multiplexer
  • the network device processor 301 can be used to read and execute computer readable instructions. Specifically, the network device processor 301 can be used to invoke a program stored in the memory 302, for example, the implementation of the signal transmission method provided by one or more embodiments of the present application on the network device 300 side, and execute the instructions included in the program. .
  • the network device 300 can be the base station 101 in the wireless communication system 100 shown in FIG. 3, and can be implemented as a base transceiver station, a wireless transceiver, a basic service set (BSS), and an extended service set (ESS). NodeB, eNodeB, access point or TRP, etc.
  • the network device 300 shown in FIG. 5 is only one implementation of the embodiment of the present application. In actual applications, the network device 300 may further include more or fewer components, which are not limited herein.
  • the embodiment of the present application provides a signal transmission method. The details are described below.
  • the aggregation level refers to the number of Control Channel Elements (CCEs) used to carry one PDCCH.
  • the Control Channel Element is the basic unit of the control channel physical resources.
  • a CCE is composed of a plurality of Resource Element Groups (REGs): in the LTE system, 9 REGs form a CCE; in the NR system, 6 REGs form a CCE.
  • An REG is composed of a plurality of resource elements (REs): in an LTE system, four REs form one REG; in an NR system, one resource block (RB) in one OFDM symbol constitutes one REG.
  • the RE consists of one subcarrier within one OFDM symbol and is the smallest physical time-frequency resource in the LTE system and the NR system.
  • the symbols and the time domain symbols are equivalently interchangeable.
  • An OFDM symbol is an example of a time domain symbol, but a time domain symbol is not limited to an OFDM symbol.
  • aggregation levels 16 and 32 may also be used.
  • the network side determines the aggregation level of the PDCCH according to factors such as the size of the Downlink Control Indicator (DCI) payload and the quality of the radio channel.
  • DCI Downlink Control Indicator
  • the system can pre-define the aggregation level set. For example, an aggregation level set ⁇ 1, 2, 4, 8 ⁇ may be defined. That is, the network side may use one, two, four, or eight CCEs to send a PDCCH. Correspondingly, the terminal needs to separately set the aggregation level to The PDCCHs 1, 2, 4, and 8 perform blind detection.
  • the system defines a series of possible locations of PDCCHs in the control resource region for each aggregation level. These locations are called PDCCH candidates.
  • the PDCCH candidate set that the terminal needs to monitor is called the search space.
  • the PDCCH candidate set corresponding to a certain aggregation level is called the search space under the aggregation level.
  • FIG. 6 exemplarily shows a control resource set (CORESET) related to the present application.
  • a CORESET is a time-frequency resource.
  • a CORESET corresponds to a group of users (such as UE1, UE2, UE3, etc.).
  • the physical downlink control channel (PDCCH) of this group of users is sent on this CORESET.
  • Each user has a search space on a CORESET whose resources are less than or equal to the resources of the CORESET.
  • a user can correspond to multiple CORESETs associated with different Numerology, such as CORESET for URLLC and CORESET for eMBB.
  • the first four time domain symbols of the 14 time domain symbols are used as the control region, but only a part of the resources in the first four time domain symbols may be defined as resources corresponding to a certain CORESET.
  • FIG. 7A exemplarily shows a logical mapping relationship between search space and PDCCH candidate.
  • a user has multiple search spaces of different aggregation levels.
  • FIG. 7A also exemplarily shows a logical mapping relationship between PDCCH candidate and CCE.
  • the system serially numbers the CCEs in the control area.
  • the CCE number is a logical number used to uniquely determine the physical resource location of the CCE.
  • the numbers of the CCEs constituting the PDCCH candidate are continuous and do not mean that the CCEs constituting the PDCCH candidate are contiguous in physical resources.
  • FIG. 7B For the mapping of CCE, PDCCH, and search space on physical resources, refer to FIG. 7B.
  • FIG. 7B exemplarily shows the distribution of CCEs on physical resources.
  • the REG constituting the CCE may be dispersed or concentrated.
  • REGs constituting CCE1, CCE2, and CCE3 are dispersed, and REGs constituting CCE4 are concentrated. That is to say, the physical resource location indicated by a CCE number may be a continuous centralized resource location or a series of scattered resource locations.
  • FIG. 7B also exemplarily shows the mapping relationship between CCE and PDCCH candidate on physical resources.
  • the physical resource location of one PDCCH candidate is a set of locations on the physical resource that constitute the CCE mapping of the PDCCH candidate.
  • the CCEs constituting a PDCCH candidate may be distributed or distributed in physical resources.
  • CCE1 and CCE2 constituting PDCCH candidate1 are distributed in physical resources
  • CCE3 constituting PDCCH candidate2 is distributed in physical resources
  • CCE4 constituting PDCCH candidate2 is on physical resources. It is concentrated.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • FIG. 7B also exemplarily shows the mapping relationship between the search space and the PDCCH candidate on physical resources.
  • the physical resource location of a search space constitutes a set of physical resource locations of the PDCCH candidate of the search space.
  • the physical resource location of the search space of UE1 includes the physical resource location of PDCCH candidate1 and the physical resource location of PDCCH candidate2.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • a CCE may be referred to as a first resource group
  • a REG may be referred to as a second resource group
  • a REGbundle may be referred to as a third resource group.
  • the first resource group includes at least one second resource group.
  • the first resource group includes at least one third resource group.
  • the third resource group includes at least one second resource group.
  • the time unit may be one of a time domain symbol, a mini-slot, a time slot, a subframe or a frame.
  • resource concepts involved in the present application may refer to existing definitions (such as the existing provisions in the LTE standard and the NR communication system), but are not limited to the existing definitions, and the future.
  • the definitions of these resource concepts in the communication standards may differ and do not affect the implementation of this application.
  • the main inventive principle of the present application may include: the network device determines a control channel parameter corresponding to each of the multiple time units, and sends the indication information to the terminal, where the network device is configured to indicate at least two sets of control channel parameters that are configured by the network device to the terminal, where Each set of control channel parameters corresponds to at least one time unit.
  • the terminal may determine, according to the indication information and an index of the time unit(s), the control channel parameters corresponding to the time unit(s).
  • the indication information may be referred to as the first configuration information. In this way, the terminal can select appropriate control channel parameters for a certain time unit(s), and can implement flexible configuration of control channel parameters.
  • control channel parameter corresponding to each of the multiple time units determined by the network device may be a control channel parameter that specifies a Numerology association.
  • the designated Numerology may be referred to as a first Numerology.
  • the first Numerology may be a Numerology that matches the URLLC service, or may be other designated Numerology, which is not limited in this application.
  • the resource scheduling situation on the above multiple time units is known.
  • the resource scheduling situation on a time unit may include whether there are other Numerology associated CORESETs on the time unit or whether there is a blank resource or a common channel (such as a synchronization channel (SCH), a broadcast channel (broadcasting). Channel, BCH), uplink random access channel (UL-RACH), etc.
  • SCH synchronization channel
  • BCH broadcast channel
  • U-RACH uplink random access channel
  • the network device can determine the control channel parameters corresponding to each time unit according to the respective resource scheduling conditions on the multiple time units, and try to avoid the CORESET and the first resource associated with the first Numerology on the multiple time units. conflict.
  • the blank resource may include, but is not limited to, the following resources: 1.
  • the NR needs to avoid some common channels of the LTE (such as the synchronization channel SCH, the broadcast channel BCH, and the uplink random access channel UL-RACH). ), resources used by pilot signals, etc. 2. Reserve resources for future expansion.
  • NR will configure some time-frequency resources as a blank resource.
  • the terminal can select an appropriate control channel parameter for the time unit(s) currently carrying the service. It can be understood that, because the network device has pre-configured the control channel parameters corresponding to the multiple time units, the terminal can determine the time unit(s) directly according to the first configuration information sent by the network device. Corresponding control channel parameters. Moreover, on the time unit(s), the first Numerology associated CORESET does not conflict or minimize conflict with the first resource.
  • the first Numerology matching service such as the URLLC service
  • the first configuration information may have the following two presentation modes: 1. One time unit index corresponds to one set of control channel parameters; 2. One set of control channel parameters corresponds to multiple time unit indexes.
  • the first configuration information may indicate control channel parameters corresponding to each time unit, although the control channel parameters corresponding to some time units are the same.
  • Each time unit here is embodied in the above correspondence as a time unit index of the time unit within a larger time span.
  • the network device may configure a control channel parameter corresponding to each time domain symbol, and the corresponding time unit index may be an index of the time domain symbol in the mini time slot, or in the time slot.
  • the index either an index within a subframe, or an index within a radio frame.
  • the first configuration information may uniformly indicate control channel parameters corresponding to multiple symbols with the same resource scheduling condition, without repeatedly indicating the same control channel in the multiple symbols. parameter.
  • the second presentation mode can save signaling overhead.
  • control channel parameters involved in the present application may include at least one of the following:
  • mapping mode continuous mapping or decentralized mapping between a control channel element (CCE) and a resource element group (REG) in a control resource set (CORESET);
  • mapping manner between the candidate physical downlink control channel (PDCCH candidate) and the CCE continuous mapping or distributed mapping
  • the manner in which the candidate physical downlink control channel (PDCCH candidate) of different aggregation levels (AL) shares resources (basic nesting mode or packet nesting mode).
  • the resources of the CORESET are different, and the control channel parameters are different.
  • the mapping between CCE and REG in CORESET is different, and the control channel parameters are different.
  • the mapping between PDCCH candidate and CCE in CORESET is different, and the control channel parameters are different.
  • the PDCCH candidates of different aggregation levels in the CORESET share different resources, and the control channel parameters are different.
  • collisions can be avoided as much as possible, and the frequency diversity gain can be improved.
  • the network device may determine the resource location of the CORESET on the time unit according to whether there is a first resource on the time unit.
  • different control channel parameters refer to different resource locations of the CORESET. The specific strategy is as follows:
  • the ratio of the frequency domain span of the CORESET on the time unit in the full bandwidth may be greater than the first threshold (eg, 80%), that is, the CORESET may occupy as much bandwidth as possible.
  • the value of the first threshold is not limited in this application, and may be determined according to actual application requirements.
  • CORESET is distributed over the frequency domain outside the first resource on the time unit.
  • FIGS. 9A-9C exemplify the above two strategies. It is assumed that the CORESET associated with Numerology1 and the CORESET associated with Numerology2 belong to the first resource.
  • the CORESET associated with the Numerology3 can occupy as much bandwidth as possible on the time unit, and can even occupy the full bandwidth.
  • the CORESET associated with Numerology3 in the frequency domain may be distributed on one side of the first resource, or distributed first in this block. Both sides of the resource, and do not overlap with this first resource.
  • the CORESET associated with the Numerology3 in the frequency domain may be distributed among the at least two first resources. And does not overlap with the at least two first resources.
  • adjusting the resource location of the CORESET may further include adjusting a time domain position of the CORESET.
  • the time unit is a symbol, there is no need to consider adjusting the time domain position of the CORESET.
  • the time unit is a slot. If there is a first resource (Numerology1 associated CORESET) in one time slot, then in addition to configuring the position of the Nuchronology3 associated CORESET in the frequency domain according to the second strategy described above (refer to FIG. 9B or 9C), the Numerology3 association may also be configured. The position of CORESET on the time domain. Optionally, the Numerology 3 associated CORESET may occupy some or all of the symbols of the time slot.
  • the first configuration information may include a resource start location and a resource end location corresponding to the control resource set.
  • the first configuration information may also include a resource start location corresponding to the control resource set and a frequency domain span and a time domain span corresponding to the control resource set.
  • the control channel parameters may also include other information that may be used to indicate the resource location of the control resource set, which is not limited herein.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device determines, according to whether there is a first resource on the time unit, the resource location of the control resource set on the time unit, so that the control resource set on the symbol does not conflict with the first resource, and is reduced. PDCCH blocking probability.
  • REG can be a REG bundle.
  • a REG bundle can contain at least two REGs.
  • a REG bundle can contain 2/3/6 REGs.
  • a REG bundle is contiguous on time-frequency resources, but the REG bundles that make up the CCE are not necessarily contiguous on time-frequency resources.
  • one CCE consists of six REGs. It can be understood that when a REG bundle contains 6 REGs, one CCE consists of only one REG bundle and is continuous on time-frequency resources. Therefore, it is possible to reflect whether the REGs included in the CCE are continuous by the size of the REG bundle (2/3/6).
  • the network device may determine, according to whether there is a first resource on the time unit, a mapping manner of REG to CCE in the CORESET on the time unit.
  • different control channel parameters refer to different mapping manners of REG to CCE in CORESET.
  • the resource locations of CORESET may be the same or different. The specific strategy is as follows:
  • the REGs contained in the CCE in the CORESET are centrally distributed.
  • control resource set of the eMBB belongs to the first resource, and the time unit is a symbol.
  • the control resource set of the URLLC two strategies of the second embodiment are described with reference to FIG. 11:
  • the REGs included in the CCE are distributed.
  • the REG bundle in CCE contains 2 or 3 REGs. This allows for more frequency diversity gain.
  • the REGs included in the CCE are collectively distributed on the first and second symbols.
  • the REG bundle in CCE contains 6 REGs. This can avoid conflicts with eMBB's control resource collection.
  • the REG included in the CCE can be in two centralized manners: 1. As shown in CCE2 in FIG. 11, the REGs included in the CCE are continuously distributed in the frequency domain; 2. As shown in CCE1 in FIG. 11, the CCE includes REGs have the same position in the frequency domain and are continuously concentrated in the time domain.
  • the size of the REG bundle in the CCE indicates whether the network device is configured with the control channel parameter corresponding to the first policy or the control channel parameter corresponding to the second policy. It can be understood that in the NR system, when the REG bundle contains 6 REGs, the REGs in the CCE are centrally distributed. When a REG bundle contains 2 or 3 REGs, the REGs in the CCE are distributed.
  • the first configuration information may include the number of REGs included in the REG bundle in the CCE, that is, the number of the second resource groups included in the second group of resource groups.
  • the first configuration information may also include other information that can be used to indicate the CCE and REG mapping manner, which is not limited herein.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device determines, according to whether there is a first resource on the time unit, the CCE and the REG mapping manner in the control resource set, and avoids the conflict between the control resource set and the first resource, and may also improve the frequency diversity of the PDCCH. Gain.
  • the network device may determine, according to whether there is a first resource on the time unit, a mapping manner of CCE to PDCCH in the CORESET on the time unit.
  • different control channel parameters refer to different mapping manners of CCE to PDCCH in CORESET.
  • the resource locations of CORESET may be the same or different. The specific strategy is as follows:
  • the CCEs contained in the PDCCH in the CORESET are centrally distributed.
  • the CCEs of the PDCCH with the aggregation level of 4 are distributed in the frequency domain. This allows for more frequency diversity gain.
  • CCEs are centrally distributed in the frequency domain. This will try to avoid conflicts with the first resource.
  • the first configuration information may include indication information indicating that the candidate physical downlink control channel corresponds to the first resource group that is consecutive in the L frequency domains, or is used to indicate that the candidate physical downlink control channel corresponds to L.
  • L is a positive integer indicating the aggregation level of the candidate physical downlink control channel.
  • the control channel parameters may also include other information that can be used to indicate the mapping manner of the CCE to the PDCCH, which is not limited herein.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device determines, according to whether there is a first resource on the time unit, the mapping manner of the CCE to the PDCCH in the control resource set, avoiding the conflict between the control resource set and the first resource, and improving the frequency diversity gain.
  • mapping manner of the REG to the CCE is determined by the second embodiment, the mapping manner adopted by the policy 1 in the second embodiment is not required, and the mapping manner of the CCE to the PDCCH is also not required. It will be a scatter map because the basic unit CCEs that make up the PDCCH are scatter mapped on the physical resources.
  • 13A and 13B exemplarily illustrate two nested resource sharing modes, respectively. The following are explained separately.
  • the first type of resource sharing the time-frequency resources used by PDCCH candidates of different aggregation levels are as close as possible. That is, the position of the time-frequency resource used by all the PDCCH candidates of different aggregation levels is the position of the time-frequency resource used by the PDCCH candidate of the aggregation type that occupies the most resources.
  • the second method of resource sharing is to divide all PDCCH candidates of different aggregation levels into two or more groups.
  • the first type of resource sharing is used in each group.
  • the terminal can analyze whether the resource sharing mode adopted by the PDCCH candidate of different aggregation levels is the first resource sharing mode or the second resource sharing. the way.
  • the first resource sharing method described above can multiplex channel estimation to a greater extent.
  • the second resource sharing method described above can reduce the blocking probability.
  • the network device may determine, according to whether there is a first resource on the time unit, a location of a time-frequency resource used by a PDCCH candidate of a different aggregation level in the CORESET on the time unit, that is, determine a different aggregation in the CORESET on the time unit.
  • the resource sharing mode adopted by the PDCCH candidate of the level In this embodiment, different control channel parameters refer to different resource sharing modes adopted by PDCCH candidates of different aggregation levels in CORESET. Among different control channel parameters, the resource locations of CORESET may be the same or different. The specific strategy is as follows:
  • the second resource sharing mode adopted by the PDCCH candidate of different aggregation levels in the CORESET on the time unit In this way, the blocking probability can be reduced.
  • the first resource sharing mode adopted by the PDCCH candidate of different aggregation levels in the CORESET In this way, the blocking probability can be reduced.
  • the first configuration information may include a resource (such as a CCE) index in the control resource set, and a candidate physical downlink control channel that maps one or more aggregation levels on the resource.
  • a resource such as a CCE
  • the terminal can analyze the location of resources used by PDCCH candidates of different aggregation levels, and finally determine which resource sharing mode is adopted by PDCCH candidates of different aggregation levels.
  • the control channel parameter may also include other information that may be used to indicate the resource sharing manner adopted by the PDCCH candidate of different aggregation levels, which is not limited herein.
  • the first configuration information may include: the indication information of the first resource sharing manner or the indication information of the second resource sharing manner.
  • a flag indicating a resource sharing manner is set in the first configuration information. When the flag bit is "1”, the first resource sharing mode described above is indicated. When the flag bit is "0”, the second resource sharing mode is indicated.
  • the examples are merely illustrative of the application and should not be construed as limiting.
  • the network device may send the first configuration information by using high layer signaling (such as RRC signaling), or may send the first configuration information by using physical layer signaling (such as DCI).
  • high layer signaling such as RRC signaling
  • physical layer signaling such as DCI
  • the network device determines, according to whether there is a first resource on the time unit, a resource sharing manner adopted by the PDCCH candidate of different aggregation levels in the control resource set, and the frequency diversity gain may be increased as much as possible. Degree of multiplexed channel estimation.
  • the present application also provides two methods of configuring control channel parameters. These two methods are separately described below in conjunction with Figs. 14A and 14B.
  • the resource locations of the control resource set (CORESET) on different time units may all be the same.
  • the control resource set on the symbol may be respectively distributed on both sides of the first resource, similar to "bypassing" the first resource.
  • the resource locations of the control resource set (CORESET) on different time units may all be the same.
  • the control resource set on the symbol may discard the data mapped on the first resource, similar to "puncturing" the control resource set.
  • the first configuration information may further include an indication information, where the indication information is used to indicate whether the control channel parameter is in the manner shown in FIG. 14A or the manner shown in FIG. 14B on the time unit having the first resource.
  • FIG. 15 illustrates a wireless communication system, a terminal, and a network device.
  • the wireless communication system 10 includes a terminal 400 and a network device 500.
  • the terminal 400 may be the terminal 200 in the embodiment of FIG. 4
  • the network device 500 may be the network device 300 in the embodiment of FIG. 5
  • the wireless communication system 10 may be the wireless communication system 100 described in FIG. Described separately below.
  • the terminal 400 may include a processing unit 401 and a communication unit 403. among them:
  • the communication unit 403 can be configured to receive first configuration information from the network device 500, the first configuration information including at least two sets of control channel parameters.
  • the control channel parameter of each of the at least two sets of control channel parameters corresponds to information of at least one time unit.
  • the processing unit 401 is configured to determine, according to the index of the time unit and the first configuration information, a control channel parameter corresponding to an index of the time unit.
  • the index of the time unit belongs to a time unit corresponding to the at least two sets of control channel parameters.
  • the network device 500 may include a communication unit 501 and a processing unit 503. among them:
  • Processing unit 503 can be configured to configure at least two sets of control channel parameters.
  • the control channel parameter of each of the at least two sets of control channel parameters corresponds to information of at least one time unit.
  • the communication unit 501 can be configured to send first configuration information to the terminal 400, where the first configuration information includes the at least two sets of control channel parameters.
  • the network device determines a control channel parameter corresponding to each of the multiple time units, and sends indication information to the terminal, where the network device is configured to indicate at least two sets of control channel parameters that are configured by the network device to the terminal.
  • the terminal may determine, according to the indication information and the time unit(s), a control channel parameter corresponding to the time unit(s).
  • the network device chip implements the functions of the network device in the foregoing method embodiment.
  • the network device chip sends the first configuration information to other modules in the network device, such as a radio frequency module or an antenna.
  • the first configuration information is sent to the terminal via other modules of the network device.
  • the terminal chip When the embodiment of the present application is applied to a terminal backup chip, the terminal chip implements the function of the terminal in the foregoing method embodiment.
  • the terminal chip receives the first configuration information from other modules in the terminal, such as a radio frequency module or an antenna, where the first configuration information is sent by the network device to the terminal.
  • the program can be stored in a computer readable storage medium, when the program is executed
  • the flow of the method embodiments as described above may be included.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

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Abstract

本申请公开了一种信号传输方法，所述方法可包括：接收来自网络设备的第一配置信息，所述第一配置信息包括至少两套控制信道参数；其中，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应；根据所述时间单元的索引和所述第一配置信息，确定出所述索引表征的时间单元对应的控制信道参数。上述方案可实现控制信道参数的灵活配置。

Description

信号传输方法、相关装置及系统 技术领域
本申请涉及无线通信技术领域，尤其涉及信号传输方法、相关装置及系统。
背景技术
目前，在新空口(New Radio，NR)通信技术的研究工作中，针对控制信道资源引入了控制信道资源集合(control resource set，CORESET)这一概念。CORESET对应一块时频资源。一个CORESET对应一组用户，在这个CORESET上会发送该组用户的物理下行控制信道(Physical Downlink Control Channel，PDCCH)。在这个CORESET上，每个用户均有一个搜索空间(search space)，该搜索空间的时频资源小于或等于这个CORESET的时频资源。
在未来的新空口通信系统中，为了支持多种场景，例如增强型移动宽带(Enhanced Mobile Broadband，eMBB),大规模机器类通信(Massive Machine Type Communication，mMTC)和高可靠性、低延迟通信(Ultra Reliable & Low Latency Communication，URLLC)等。系统会同时配置不同的参数(numerology)以支持不同业务场景。参数(numerology)表示时频资源的属性，包含一组参数，例如时域调度间隔、子载波间隔(Subcarrier spacing)、符号长度(Symbol duration)、循环前缀(cyclic prefix，CP)长度等。
如图1A所示，在混合Numerology场景中，不同Numerology关联的CORESET对应不同业务属性的一组用户。例如Numerology3关联的CORESET对应一组URLLC用户，该组URLLC用户在Numerology3关联的CORESET中发送PDCCH。
为了保证URLLC业务的及时传输，URLLC业务可以抢占其他Numerology关联的资源(如承载eMBB业务的资源)。如图1B所示，当URLLC业务在其他Numerology关联的资源的前几个符号上抢占资源时，Numerology3关联的CORESET可能会与其他Numerology关联的资CORESET发生冲突，可能会导致某个(些)用户在搜索空间中找不到可用的PDCCH资源来传输URLLC业务对应的控制信息。
现有技术中，为了避免URLLC关联的CORESET和其他Numerology关联的CORESET产生冲突，如图2所示，将URLLC关联的CORESET始终限制在一个较小的频域范围内，使得URLLC关联的CORESET在任意符号上都尽量不会与URLLC关联的CORESET冲突。这会导致每一个符号上URLLC关联的CORESET都被固定限制在一个较小的频域范围内，这种资源配置方式不灵活。
发明内容
本申请提供了信号传输方法、相关装置及系统，可实现控制信道参数的灵活配置。
第一方面，本申请提供了一种信号传输方法，应用在网络设备侧，该方法包括：网络设备为终端配置至少两套控制信道参数，然后向终端发送第一配置信息，所述第一配置信息包括所述至少两套控制信道参数。这里，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应。
第二方面，本申请提供了一种信号传输方法，应用在终端侧，该方法包括：终端接收来自网络设备的第一配置信息，然后根据时间单元的索引和所述第一配置信息，确定出所述索引表征的时间单元对应的控制信道参数。这里，所述第一配置信息可包括网络设备配置的至少两套控制信道参数。其中，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应。
实施第一方面和第二方面描述的方法，终端就可以从网络设备配置的至少两套控制信道参数中为某一个(些)时间单元选择合适的控制信道参数，可实现控制信道参数的灵活配置。
本申请中，网络设备确定的上述多个时间单元各自对应的控制信道参数可以是指定Numerology关联的控制信道参数。本申请中，可以将该指定Numerology称为第一Numerology。第一Numerology可以是匹配URLLC业务的Numerology，也可以是其他指定Numerology，本申请不作限制。
在网络设备侧，网络设备根据多个时间单元上的已知的资源调度情况确定这多个时间单元各自对应的控制信道参数。一个时间单元上的资源调度情况可包括该时间单元上是否有其他Numerology关联的CORESET或是否有空白资源(blank resource)或是否有公共信道(如同步信道SCH、广播信道BCH、上行随机接入信道UL-RACH)等使用的资源。这里，可以将其他Numerology关联的CORESET或空白资源或公共信道等称为第一资源。这样，网络设备可以根据上述多个时间单元上各自的资源调度情况，确定其中每一个时间单元对应的控制信道参数，尽量避免在所述多个时间单元上第一Numerology关联的CORESET和第一资源冲突。
在终端侧，当第一Numerology匹配的业务(如URLLC业务)到来时，终端可以为当前承载该业务的一个(些)时间单元选择合适的的控制信道参数。可以理解的，由于网络设备已经预先配置了上述多个时间单元各自对应的控制信道参数，因此，终端可以直接根据网络设备发送的所述第一配置信息便可确定出这一个(些)时间单元对应的控制信道参数。而且，在这一个(些)时间单元上，第一Numerology关联的CORESET和第一资源不冲突或冲突最小。
本申请中，所述第一配置信息可以有下述两种呈现方式：1.一个时间单元索引对应一套控制信道参数；2.一套控制信道参数对应多个时间单元索引。
在第1种呈现方式中，所述第一配置信息可以指示每一个时间单元对应的控制信道参数，尽管某些时间单元对应的控制信道参数相同。也即是说，网络设备可以配置每一个符号对应的控制信道参数。
在第2种呈现方式中，所述第一配置信息可以统一指示资源调度情况相同的多个符号对应的控制信道参数，而不必在这多个符号重复指示相同的控制信道参数。相比第1种呈现方式，第2种呈现方式可以节约信令开销。
本申请中涉及的控制信道参数(控制信道参数)可包括以下至少一项：
(1)控制资源集合(CORESET)的资源位置；
(2)控制资源集合(CORESET)中控制信道单元(CCE)与资源单元组(REG)之间的映射方式(连续映射或分散映射)；
(3)候选物理下行控制信道(PDCCH candidate)与CCE之间的映射方式(连续映射或分散映射)；
(4)控制资源集合中，不同聚合等级(AL)的候选物理下行控制信道(PDCCH candidate)所使用的资源的位置。
(5)控制资源集合中，不同聚合等级(AL)的候选物理下行控制信道(PDCCH candidate)共享资源的方式(基本嵌套方式或分组嵌套方式)。
可以理解的，CORESET的资源位置不同，控制信道参数不同。CORESET中CCE和REG的映射方式不同，控制信道参数不同。CORESET中PDCCH candidate和CCE的映射方式不同，控制信道参数不同。CORESET中PDCCH candidate和CCE的映射方式不同，控制信道参数不同。CORESET中不同聚合等级的PDCCH candidate共享资源的方式不同，控制信道参数不同。本申请中，通过调整控制信道参数可以尽量避免冲突，还可以提高频率分集增益。关于本申请中确定控制信道参数的方法，具体可参考后续实施例。
结合第一方面或第二方面，在第一个实施例中，网络设备可以根据时间单元上是否有第一资源来确定CORESET在该时间单元上的资源位置。具体策略如下：
1.如果一个时间单元上没有第一资源，则CORESET在该时间单元上的频域跨度在全带宽中的占比可以大于第一阈值(如80％)，即CORESET可以占据尽量大的带宽。本申请对第一阈值的取值不作限制，可以根据实际应用需求来确定。
2.如果一个时间单元上有第一资源，则CORESET在该时间单元上分布在第一资源之外的频域上。
在第一个实施例中，所述控制资源集合对应的资源位置可包括控制资源集合对应的资源起始位置和资源结束位置。可选的，所述第一配置信息也可包括所述控制资源集合对应的资源起始位置和所述控制资源集合对应的频域跨度、时域跨度。不限于此，控制信道参数还可包括其他可用于指示所述控制资源集合的资源位置的信息，这里不作限制。
在第一个实施例中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
结合第一方面或第二方面，在第二个实施例中，网络设备可以根据时间单元上是否有第一资源来确定该时间单元上CORESET中REG到CCE的映射方式。具体策略如下：
1.如果一个时间单元上没有第一资源，则在该时间单元上，CORESET中CCE包含的REG是分散分布的。
2.如果一个时间单元上有第一资源，则在该时间单元上，CORESET中CCE包含的REG是集中分布的。
在第二个实施例中，可以通过CCE中REG bundle的大小来指示网络设备配置的是上述第1种策略对应的控制信道参数，还是上述第2种策略对应的控制信道参数。可以理解的，在NR系统中，当REG bundle包含6个REG时，CCE中的REG是集中分布的。当REG bundle包含2或3个REG时，CCE中的REG是分散分布的。
在第二个实施例中，REG到CCE的映射方式可包括CCE中REG bundle所包含的REG的数量，即一组第二资源组所包含的第二资源组的数量。不限于此，所述第一配置信息还 可包括其他可用于指示CCE和REG映射方式的信息，这里不作限制。
在第二个实施例中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
结合第一方面或第二方面，在第三个实施例中，网络设备可以根据时间单元上是否有第一资源来确定该时间单元上CORESET中CCE到PDCCH的映射方式。具体策略如下：
1.如果一个时间单元上没有第一资源，则在该时间单元上，CORESET中PDCCH包含的CCE是分散分布的。
2.如果一个时间单元上有第一资源，则在该时间单元上，CORESET中PDCCH包含的CCE是集中分布的。
在第三个实施例中，CCE到PDCCH的映射方式可包括候选物理下行控制信道对应L个频域上连续的所述第一资源组，或者候选物理下行控制信道对应L个频域上分散的所述第一资源组。这里，L是正整数，表示候选物理下行控制信道的聚合等级。不限于此，控制信道参数还可包括其他可用于指示CCE到PDCCH的映射方式的信息，这里不作限制。
在第三个实施例中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
结合第一方面或第二方面，在第四个实施例中，网络设备可以根据时间单元上是否有第一资源来确定该时间单元上CORESET中不同聚合等级的PDCCH candidate所使用的时频资源的位置，即确定该时间单元上CORESET中不同聚合等级的PDCCH candidate采用的资源共享方式。具体策略如下：
1.如果一个时间单元上没有第一资源，则在该时间单元上，CORESET中不同聚合等级的PDCCH candidate采用的第二种资源共享方式。这样，能够降低阻塞概率。
2.如果一个时间单元上有第一资源，则在该时间单元上，CORESET中不同聚合等级的PDCCH candidate采用的第一种资源共享方式。这样，可以更大程度的复用信道估计。
在第四个实施例中，上述第一种资源共享方式为：不同聚合等级的PDCCH candidate所使用的时频资源都尽量重合。即，全部的不同聚合等级的PDCCH candidate所使用的时频资源的位置即占用资源最多的一种聚合等级的PDCCH candidate所使用的时频资源的位置的部分或全部。
在第四个实施例中，上述第二种资源共享方式为：将全部的不同聚合等级的PDCCH candidate分成两组或更多组。在每一组中均采用上述第一种资源共享方式。
在第四个实施例中，控制信道参数具体可包括所述控制资源集合中的资源(如CCE)索引，以及映射在所述资源上的一种或多种聚合等级的候选物理下行控制信道。这样，根据该资源索引，终端可以分析出不同聚合等级的PDCCH candidate所用的资源的位置，最后确定不同聚合等级的PDCCH candidate采用的是哪一种资源共享方式。不限于此，控制信道参数还可包括其他可用于指示不同聚合等级的PDCCH candidate所采用的资源共享方式的信息，这里不作限制。
可选的，控制信道参数具体也可包括：上述第一种资源共享方式的指示信息或上述第 二种资源共享方式的指示信息。例如，在所述第一配置信息中设置一个指示资源共享方式的标志位。当该标志位为“1”时，指示上述第一种资源共享方式。当该标志位为“0”时，指示上述第二种资源共享方式。示例仅仅用于解释本申请，不应构成限定。
在第四个实施例中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
第三方面，本申请提供了一种网络设备，该网络设备可包括多个功能模块，用于相应的执行第一方面所提供的方法，或者第一方面可能的实施方式中的任意一种所提供的方法。
第四方面，本申请提供了一种终端，该终端可包括多个功能模块，用于相应的执行第二方面所提供的方法，或者第二方面可能的实施方式中的任意一种所提供的方法。
第五方面，本申请提供了一种网络设备，用于执行第一方面描述的信号传输方法。所述网络设备可包括：存储器以及与所述存储器耦合的处理器、收发器，其中：所述收发器用于与其他通信设备(如终端)通信。所述存储器用于存储第一方面描述的信号传输方法的实现代码，所述处理器用于执行所述存储器中存储的程序代码，即执行第一方面所提供的方法，或者第一方面可能的实施方式中的任意一种所提供的方法。
第六方面，本申请提供了一种终端，用于执行第二方面描述的信号传输方法。所述终端可包括：存储器以及与所述存储器耦合的处理器、收发器，其中：所述收发器用于与其他通信设备(如网络设备)通信。所述存储器用于存储第二方面描述的信号传输的实现代码，所述处理器用于执行所述存储器中存储的程序代码，即执行第二方面所提供的方法，或者第二方面可能的实施方式中的任意一种所提供的方法。
第七方面，提供了一种通信系统，所述通信系统包括：网络设备和终端，其中：
所述网络设备用于为终端配置至少两套控制信道参数，然后向终端发送第一配置信息，所述第一配置信息包括所述至少两套控制信道参数。这里，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应。
所述终端用于接收来自网络设备的第一配置信息，然后根据时间单元的索引和所述第一配置信息，确定出所述时间单元的索引对应的控制信道参数。
具体的，所述网络设备可以是第三方面或第五方面描述的网络设备。所述终端可以是第四方面或第六方面描述的终端。
第八方面，提供了一种计算机可读存储介质，所述可读存储介质上存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面描述的信号传输方法。
第九方面，提供了另一种计算机可读存储介质，所述可读存储介质上存储有指令，当其在计算机上运行时，使得计算机执行上述第二方面描述的信号传输方法。
结合第十方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面描述的信号传输方法。
结合第十一方面，提供了另一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第二方面描述的信号传输方法。
附图说明
图1A是本申请涉及的混合Numerology场景的资源示意图；
图1B是本申请涉及的混合Numerology场景的资源冲突的示意图；
图2是现有技术中解决混合Numerology场景的资源冲突的资源映射示意图；
图3是本申请涉及的无线通信系统的架构示意图；
图4是本申请的一个实施例提供的终端的硬件架构示意图；
图5是本申请的一个实施例提供的基站的硬件架构示意图；
图6是本申请涉及的控制资源集合的示意图；
图7A-7B是本申请涉及的搜索空间、候选物理下行控制信道、控制信道单元以及资源单元组之间的映射关系的示意图；
图8A-8B是本申请提供的两种指示控制信道参数的方法的示意图；
图9A-9C是本申请的一个实施例提供的配置控制信道参数的策略示意图；
图10是本申请的另一个实施例提供的配置控制信道参数的策略示意图；
图11是本申请的再一个实施例提供的配置控制信道参数的策略示意图；
图12A-12B是本申请的再一个实施例提供的配置控制信道参数的策略示意图；
图13A-13B是本申请的再一个实施例提供的配置控制信道参数的策略示意图；
图14A-14B是本申请的再一个实施例提供的配置控制信道参数的策略示意图；
图15是本申请的提供的无线通信系统，终端和网络设备的功能框图。
具体实施方式
本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。
图3示出了本申请涉及的无线通信系统。所述无线通信系统可以是长期演进(Long Term Evolution，LTE)系统，也可以是未来演进的第五代移动通信(the 5th Generation，5G)系统、新空口(NR)系统，机器与机器通信(Machine to Machine，M2M)系统等。如图3所示，无线通信系统100可包括：一个或多个网络设备101，一个或多个终端103，以及核心网115。其中：
网络设备101可以为基站，基站可以用于与一个或多个终端进行通信，也可以用于与一个或多个具有部分终端功能的基站进行通信(比如宏基站与微基站，如接入点，之间的通信)。基站可以是时分同步码分多址(Time Division Synchronous Code Division Multiple Access，TD-SCDMA)系统中的基站收发台(Base Transceiver Station，BTS)，也可以是LTE系统中的演进型基站(Evolutional Node B，eNB)，以及5G系统、新空口(NR)系统中的基站。另外，基站也可以为接入点(Access Point，AP)、传输节点(Trans TRP)、中心单元(Central Unit，CU)或其他网络实体，并且可以包括以上网络实体的功能中的一些或所有功能。
终端103可以分布在整个无线通信系统100中，可以是静止的，也可以是移动的。在本申请的一些实施例中，终端103可以是移动设备、移动台(mobile station)、移动单元(mobile unit)、M2M终端、无线单元，远程单元、用户代理、移动客户端等等。
具体的，网络设备101可用于在网络设备控制器(未示出)的控制下，通过无线接口105与终端103通信。在一些实施例中，所述网络设备控制器可以是核心网115的一部分， 也可以集成到网络设备101中。具体的，网络设备101可用于通过回程(blackhaul)接口113(如S1接口)向核心网115传输控制信息或者用户数据。具体的，网络设备101与网络设备101之间也可以通过回程(blackhaul)接口111(如X2接口)，直接地或者间接地，相互通信。
需要说明的，图3示出的无线通信系统100仅仅是为了更加清楚的说明本申请的技术方案，并不构成对本申请的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请提供的技术方案对于类似的技术问题，同样适用。
参考图4，图4示出了本申请的一些实施例提供的终端200。如图4所示，终端200可包括：一个或多个终端处理器201、存储器202、通信接口203、接收器205、发射器206、耦合器207、天线208、用户接口202，以及输入输出模块(包括音频输入输出模块210、按键输入模块211以及显示器212等)。这些部件可通过总线204或者其他方式连接，图4以通过总线连接为例。其中：
通信接口203可用于终端200与其他通信设备，例如网络设备，进行通信。具体的，所述网络设备可以是图5所示的网络设备300。具体的，通信接口203可以是长期演进(LTE)(4G)通信接口，也可以是5G或者未来新空口的通信接口。不限于无线通信接口，终端200还可以配置有有线的通信接口203，例如局域接入网(Local Access Network，LAN)接口。
发射器206可用于对终端处理器201输出的信号进行发射处理，例如信号调制。接收器205可用于对天线208接收的移动通信信号进行接收处理，例如信号解调。在本申请的一些实施例中，发射器206和接收器205可看作一个无线调制解调器。在终端200中，发射器206和接收器205的数量均可以是一个或者多个。天线208可用于将传输线中的电磁能转换成自由空间中的电磁波，或者将自由空间中的电磁波转换成传输线中的电磁能。耦合器207用于将天线208接收到的移动通信信号分成多路，分配给多个的接收器205。
除了图4所示的发射器206和接收器205，终端200还可包括其他通信部件，例如GPS模块、蓝牙(Bluetooth)模块、无线高保真(Wireless Fidelity，Wi-Fi)模块等。不限于上述表述的无线通信信号，终端200还可以支持其他无线通信信号，例如卫星信号、短波信号等等。不限于无线通信，终端200还可以配置有有线网络接口(如LAN接口)来支持有线通信。
所述输入输出模块可用于实现终端200和用户/外部环境之间的交互，可主要包括包括音频输入输出模块210、按键输入模块211以及显示器212等。具体的，所述输入输出模块还可包括：摄像头、触摸屏以及传感器等等。其中，所述输入输出模块均通过用户接口209与终端处理器201进行通信。
存储器202与终端处理器201耦合，用于存储各种软件程序和/或多组指令。具体的，存储器202可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。存储器202可以存储操作系统(下述简称系统)，例如ANDROID，IOS，WINDOWS，或者LINUX等嵌入式操作系统。存储器202还可以存储网络通信程序，该网络通信程序可用于与一个或多个附加设备，一 个或多个终端设备，一个或多个网络设备进行通信。存储器202还可以存储用户接口程序，该用户接口程序可以通过图形化的操作界面将应用程序的内容形象逼真的显示出来，并通过菜单、对话框以及按键等输入控件接收用户对应用程序的控制操作。
在本申请的一些实施例中，存储器202可用于存储本申请的一个或多个实施例提供的信号传输方法在终端200侧的实现程序。关于本申请的一个或多个实施例提供的信号传输方法的实现，请参考后续实施例。
终端处理器201可用于读取和执行计算机可读指令。具体的，终端处理器201可用于调用存储于存储器212中的程序，例如本申请的一个或多个实施例提供的信号传输方法在终端200侧的实现程序，并执行该程序包含的指令。
可以理解的，终端200可以是图3示出的无线通信系统100中的终端103，可实施为移动设备，移动台(mobile station)，移动单元(mobile unit)，无线单元，远程单元，用户代理，移动客户端等等。
需要说明的，图4所示的终端200仅仅是本申请实施例的一种实现方式，实际应用中，终端200还可以包括更多或更少的部件，这里不作限制。
参考图5，图5示出了本申请的一些实施例提供的网络设备300。如图5所示，网络设备300可包括：一个或多个网络设备处理器301、存储器302、通信接口303、发射器305、接收器306、耦合器307和天线308。这些部件可通过总线304或者其他式连接，图5以通过总线连接为例。其中：
通信接口303可用于网络设备300与其他通信设备，例如终端设备或其他网络设备，进行通信。具体的，所述终端设备可以是图4所示的终端200。具体的，通信接口303通信接口203可以是长期演进(LTE)(4G)通信接口，也可以是5G或者未来新空口的通信接口。不限于无线通信接口，网络设备300还可以配置有有线的通信接口303来支持有线通信，例如一个网络设备300与其他网络设备300之间的回程链接可以是有线通信连接。
发射器305可用于对网络设备处理器301输出的信号进行发射处理，例如信号调制。接收器306可用于对天线308接收的移动通信信号进行接收处理。例如信号解调。在本申请的一些实施例中，发射器305和接收器306可看作一个无线调制解调器。在网络设备300中，发射器305和接收器306的数量均可以是一个或者多个。天线308可用于将传输线中的电磁能转换成自由空间中的电磁波，或者将自由空间中的电磁波转换成传输线中的电磁能。耦合器307可用于将移动通信号分成多路，分配给多个的接收器306。
存储器302与网络设备处理器301耦合，用于存储各种软件程序和/或多组指令。具体的，存储器302可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。存储器302可以存储操作系统(下述简称系统)，例如uCOS、VxWorks、RTLinux等嵌入式操作系统。存储器302还可以存储网络通信程序，该网络通信程序可用于与一个或多个附加设备，一个或多个终端设备，一个或多个网络设备进行通信。
网络设备处理器301可用于进行无线信道管理、实施呼叫和通信链路的建立和拆除，并为本控制区内的用户提供小区切换控制等。具体的，网络设备处理器301可包括：管理/ 通信模块(Administration Module/Communication Module，AM/CM)(用于话路交换和信息交换的中心)、基本模块(Basic Module，BM)(用于完成呼叫处理、信令处理、无线资源管理、无线链路的管理和电路维护功能)、码变换及子复用单元(Transcoder and SubMultiplexer，TCSM)(用于完成复用解复用及码变换功能)等等。
本申请实施例中，网络设备处理器301可用于读取和执行计算机可读指令。具体的，网络设备处理器301可用于调用存储于存储器302中的程序，例如本申请的一个或多个实施例提供的信号传输方法在网络设备300侧的实现程序，并执行该程序包含的指令。
可以理解的，网络设备300可以是图3示出的无线通信系统100中的基站101，可实施为基站收发台，无线收发器，一个基本服务集(BSS)，一个扩展服务集(ESS)，NodeB，eNodeB，接入点或TRP等等。
需要说明的，图5所示的网络设备300仅仅是本申请实施例的一种实现方式，实际应用中，网络设备300还可以包括更多或更少的部件，这里不作限制。
基于前述无线通信系统100、终端200以及网络设备300分别对应的实施例，本申请实施例提供了一种信号传输方法。下面详细介绍。
首先，为了便于理解本申请，下面介绍本申请涉及的基本概念。
(一)PDCCH的聚合等级(Aggregation Level，AL)
聚合等级是指用于承载一个PDCCH的控制信道单元(Control Channel Element，CCE)的个数。其中，控制信道单元(CCE)是控制信道物理资源的基本单位。一个CCE由多个资源单元组(Resource Element Group，REG)组成：在LTE系统中，9个REG组成一个CCE；在NR系统中，6个REG组成一个CCE。一个REG由多个资源单元(resource element,RE)组成：在LTE系统中，4个RE组成一个REG；在NR系统中，一个OFDM符号内的一个资源块(resource block，RB)组成一个REG。RE由一个OFDM符号内的一个子载波组成，是LTE系统和NR系统中的最小的物理时频资源。在本申请中，如无特殊说明，符号和时域符号之间是等同可以互换的。OFDM符号是时域符号的一种举例，但时域符号并不限定为OFDM符号。
在LTE系统中，常用的聚合等级有1，2，4和8。在NR系统中，还可能会用到聚合等级16和32。
网络侧根据下行控制指示(Downlink Control Indicator，DCI)载荷的大小以及无线信道质量等因素，确定PDCCH的聚合等级。DCI载荷越大，对应的PDCCH的聚合等级就越大。无线信道质量越差，为了保证PDCCH的传输质量，所需要的PDCCH的聚合等级也就越大。
(二)控制信道搜索空间(search space)
对于终端来说，每一个PDCCH的CCE的个数是变化的而且没有信令通知，所以终端不得不对所有可能的聚合等级的PDCCH candidate进行盲检。为了减少盲检次数，降低终端盲检的复杂度，系统可以预先定义聚合等级集合。例如，可以定义一个聚合等级集合{1,2,4,8}，也就是说网络侧可能采用1个、2个、4个或8个CCE发送PDCCH，对应地，终端需要分别对聚合等级为1、2、4和8的PDCCH进行盲检。
为了进一步减少盲检次数，降低终端盲检的复杂度，系统针对每一个聚合等级在控制资源区域内定义了一系列的PDCCH可能出现的位置，这些位置称之为候选PDCCH(PDCCH candidate)。终端需要监测的PDCCH candidates集合称之为搜索空间(search space)。某一个聚合等级对应的PDCCH candidate集合称之为该聚合等级下的搜索空间。
(三)控制资源集合(CORESET)
图6示例性的示出了本申请涉及的控制资源集合(CORESET)。如图6所示，一个CORESET是一块时频资源。一个CORESET对应一组用户(如UE1，UE2，UE3等)。在这个CORESET上会发送这一组用户的物理下行控制信道(PDCCH)。每个用户在一个CORESET上有一个搜索空间(search space)，该search space的资源小于等于CORESET的资源。一个用户可以对应多个不同Numerology关联的CORESET，例如URLLC的CORESET、eMBB的CORESET。图6中以14个时域符号的前4个时域符号为控制区域，但可以只定义前4个时域符号中一部分资源为某一个CORESET所对应的资源。
图7A-7B示例性的说明REG、CCE、PDCCH candidate、search space之间的映射关系。如下：
图7A示例性的示出了search space和PDCCH candidate在逻辑上的映射关系。如图7A所示，一个用户有多个不同聚合等级的search space。以图7A中的终端A为例，终端A有4个不同聚合等级的search space，其中，聚合等级为8(AL＝8)的search space包括2个聚合等级为8(AL＝8)的PDCCH candidate，聚合等级为4(AL＝4)的search space包括2个聚合等级为4(AL＝4)的PDCCH candidate，聚合等级为2(AL＝2)的search space包括6个聚合等级为2(AL＝2)的PDCCH candidate，聚合等级为1(AL＝1)的search space包括6个聚合等级为1(AL＝1)的PDCCH candidate。
图7A也示例性的示出了PDCCH candidate和CCE在逻辑上的映射关系。系统对控制区域内的CCE进行了统一的编号。CCE的编号是逻辑编号，用于唯一确定CCE的物理资源位置。构成PDCCH candidate的CCE的编号是连续的并不代表构成PDCCH candidate的CCE在物理资源上是连续的。关于CCE、PDCCH、search space在物理资源上的映射可参考图7B。
图7B示例性的示出了CCE在物理资源上的分布。如图7B所示，CCE映射在物理资源上时，构成CCE的REG可能是分散的，也可能是集中的。例如，构成CCE1、CCE2和CCE3的REG是分散的，构成CCE4的REG是集中的。也即是说，一个CCE编号唯一指示的物理资源位置可能是一块连续集中的资源位置，也可能是一系列分散的资源位置。
图7B也示例性的示出了CCE和PDCCH candidate在物理资源上的映射关系。如图7B所示，一个PDCCH candidate的物理资源位置即构成该PDCCH candidate的CCE映射在物理资源上位置集合。构成一个PDCCH candidate的CCE在物理资源上可能是分散分布的，也可能是集中分布的。例如，如图7B所示，构成PDCCH candidate1的CCE1、CCE2在物理资源上都是分散分布的，构成PDCCH candidate2的CCE3在物理资源上都是分散分布的，构成PDCCH candidate2的CCE4在物理资源上都是集中分布的。示例仅仅用于解释本申请，不应构成限定。
图7B还示例性的示出了search space和PDCCH candidate在物理资源上的映射关系。如 图7B所示，一个search space的物理资源位置即构成该search space的PDCCH candidate的物理资源位置集合。例如，如图7B所示，UE1的search space的物理资源位置包括PDCCH candidate1的物理资源位置和PDCCH candidate2的物理资源位置。示例仅仅用于解释本申请，不应构成限定。
本申请中，可以将CCE称为第一资源组，可以将REG称为第二资源组，可以将REGbundle称为第三资源组。第一资源组包括至少一个第二资源组。第一资源组包括至少一个第三资源组。第三资源组包括至少一个第二资源组。
本申请中，时间单元可以是时域符号、微时隙(mini-slot)、时隙、子帧或帧中的一种。
需要说明的，本申请涉及的资源概念，如REG、CCE、PDCCH、search space等，可以参考现有定义(如LTE标准、NR通信系统中的已有规定)，但是不限于现有定义，未来通信标准中关于这些资源概念的定义可能不同，不影响本申请的实施。
其次，本申请的主要发明原理可包括：网络设备确定多个时间单元各自对应的控制信道参数，并向终端发送指示信息，用于指示网络设备配置给终端的至少2套控制信道参数，其中，每一套控制信道参数均与至少一个时间单元对应。相应的，终端可以根据该指示信息和一个(些)时间单元的索引确定该这一个(些)时间单元对应的控制信道参数。本申请中，该指示信息可称为所述第一配置信息。这样，终端就可以为某一个(些)时间单元选择合适的控制信道参数，可实现控制信道参数的灵活配置。
这里，网络设备确定的上述多个时间单元各自对应的控制信道参数可以是指定Numerology关联的控制信道参数。本申请中，可以将该指定Numerology称为第一Numerology。第一Numerology可以是匹配URLLC业务的Numerology，也可以是其他指定Numerology，本申请不作限制。
对于网络设备来说，上述多个时间单元上的资源调度情况是已知的。一个时间单元上的资源调度情况可包括该时间单元上是否有其他Numerology关联的CORESET或是否有空白资源(blank resource)或是否有公共信道(如同步信道(synchronization channel，SCH)、广播信道(broadcasting channel，BCH)、上行随机接入信道(uplink random access channel，UL-RACH))等使用的资源。这里，可以将其他Numerology关联的CORESET或空白资源或公共信道等称为第一资源。这样，网络设备可以根据上述多个时间单元上各自的资源调度情况，确定其中每一个时间单元对应的控制信道参数，尽量避免在所述多个时间单元上第一Numerology关联的CORESET和第一资源冲突。
这里，空白资源(blank resource)可以包括但不限于以下资源：1.NR与LTE共存时NR需要避开LTE的一些公共信道(如同步信道SCH、广播信道BCH、上行随机接入信道UL-RACH)、导频信号等使用的资源。2.预留给未来扩展用的资源。总之，NR会将某些时频资源配置为blank resource。
在终端侧，当第一Numerology匹配的业务(如URLLC业务)到来时，终端可以为当前承载该业务的一个(些)时间单元选择合适的的控制信道参数。可以理解的，由于网络设备已经预先配置了上述多个时间单元各自对应的控制信道参数，因此，终端可以直接根据网络设备发送的所述第一配置信息便可确定出这一个(些)时间单元对应的控制信道参数。而且，在这一个(些)时间单元上，第一Numerology关联的CORESET和第一资源不 冲突或冲突最小。
本申请中，所述第一配置信息可以有下述两种呈现方式：1.一个时间单元索引对应一套控制信道参数；2.一套控制信道参数对应多个时间单元索引。
在第1种呈现方式中，如图8A所示，所述第一配置信息可以指示每一个时间单元对应的控制信道参数，尽管某些时间单元对应的控制信道参数相同。这里的每一个时间单元，在上述对应关系中体现为该时间单元在一个更大的时间跨度内的一个时间单元索引。以时间单元为一个时域符号为例，网络设备可以配置每一个时域符号对应的控制信道参数，对应的时间单元索引可以是时域符号在迷你时隙内的索引，或者是在时隙内的索引，或者是在子帧内的索引，或者也可以是在无线帧内的索引。
在第2种呈现方式中，如图8B所示，所述第一配置信息可以统一指示资源调度情况相同的多个符号对应的控制信道参数，而不必在这多个符号重复指示相同的控制信道参数。相比第1种呈现方式，第2种呈现方式可以节约信令开销。
本申请中涉及的控制信道参数(控制信道参数)可包括以下至少一项：
(1)控制资源集合(CORESET)的资源位置；
(2)控制资源集合(CORESET)中控制信道单元(CCE)与资源单元组(REG)之间的映射方式(连续映射或分散映射)；
(3)候选物理下行控制信道(PDCCH candidate)与CCE之间的映射方式(连续映射或分散映射)；
(4)控制资源集合中，不同聚合等级(AL)的候选物理下行控制信道(PDCCH candidate)所使用的资源的位置。
(5)控制资源集合中，不同聚合等级(AL)的候选物理下行控制信道(PDCCH candidate)共享资源的方式(基本嵌套方式或分组嵌套方式)。
可以理解的，CORESET的资源位置不同，控制信道参数不同。CORESET中CCE和REG的映射方式不同，控制信道参数不同。CORESET中PDCCH candidate和CCE的映射方式不同，控制信道参数不同。CORESET中不同聚合等级的PDCCH candidate共享资源的方式不同，控制信道参数不同。本申请中，通过调整控制信道参数可以尽量避免冲突，还可以提高频率分集增益。关于本申请中确定控制信道参数的方法，具体可参考后续实施例。
基于前述发明原理，下面通过几个实施例来详细介绍本申请提供的配置控制信道参数的方法。下述实施例一至实施例四可以结合实施。
(一)实施例一
本实施例中，网络设备可以根据时间单元上是否有第一资源来确定CORESET在该时间单元上的资源位置。本实施例中，不同控制信道参数是指CORESET的资源位置不同。具体策略如下：
1.如果一个时间单元上没有第一资源，则CORESET在该时间单元上的频域跨度在全带宽中的占比可以大于第一阈值(如80％)，即CORESET可以占据尽量大的带宽。本申请对第一阈值的取值不作限制，可以根据实际应用需求来确定。
2.如果一个时间单元上有第一资源，则CORESET在该时间单元上分布在第一资源之 外的频域上。
以配置Numerology3(即前述第一Numerology)关联的CORESET为例，图9A-9C示例性说明了上述2种策略。假设Numerology1关联的CORESET和Numerology2关联的CORESET均属于第一资源。
如图9A所示，如果时间单元上没有第一资源(Numerology1或Numerology2关联的CORESET)，则Numerology3关联的CORESET在该时间单元上可以尽量大的占据带宽，甚至可以占据全带宽。
如图9B所示，如果时间单元上有一块第一资源(Numerology1关联的CORESET)，则在频域上Numerology3关联的CORESET可以分布在这一块第一资源的一侧，或者分布在这一块第一资源的两侧，且不与这一块第一资源重叠。
如图9C所示，如果时间单元上有至少两块第一资源(Numerology1关联的CORESET和Numerology2关联的CORESET)，则在频域上Numerology3关联的CORESET可以分散分布在该至少两块第一资源之间，且不与该至少两块第一资源重叠。
上述2种策略描述了如何调整CORESET的频域位置，不限于此，还可以调整CORESET的时域位置。可以理解的，当时间单元是子帧(或帧)、微时隙、时隙这种比较大的时间间隔时，调整CORESET的资源位置还可以包括调整CORESET的时域位置。当时间单元是符号时，无需考虑调整CORESET的时域位置。
如图10所示，假设时间单元是时隙(slot)。如果一个时隙上有第一资源(Numerology1关联的CORESET)，那么，除了按照上述第2种策略配置Numerology3关联的CORESET在频域上的位置(参考图9B或9C)，还可以配置Numerology3关联的CORESET在时域上的位置。可选的，Numerology3关联的CORESET可以占据该时隙的部分或全部符号。
实施例一中，所述第一配置信息可包括控制资源集合对应的资源起始位置和资源结束位置。可选的，所述第一配置信息也可包括所述控制资源集合对应的资源起始位置和所述控制资源集合对应的频域跨度、时域跨度。不限于此，控制信道参数还可包括其他可用于指示所述控制资源集合的资源位置的信息，这里不作限制。
实施例一中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
可以理解的，实施例一中，网络设备根据时间单元上有没有第一资源来确定控制资源集合在该时间单元上的资源位置，使得该符号上的控制资源集合与第一资源不冲突，降低PDCCH阻塞概率。
(二)实施例二
首先，需要了解的是，REG可以成REG组(REG bundle)，一个REG bundle可以包含至少两个REG，例如一个REG bundle可以包含2/3/6个REG。一个REG bundle在时频资源上是连续的，但组成CCE的REG bundle在时频资源上不一定连续。在NR系统中，一个CCE由6个REG构成。可以理解的，当一个REG bundle包含6个REG时，一个CCE仅由一个REG bundle构成，在时频资源上是连续的。因此，可以通过REG bundle的大小 (2/3/6)来体现CCE包含的REG是否连续。
本实施例中，网络设备可以根据时间单元上是否有第一资源来确定该时间单元上CORESET中REG到CCE的映射方式。本实施例中，不同控制信道参数是指CORESET中REG到CCE的映射方式不同。不同的控制信道参数中，CORESET的资源位置可以相同，也可以不同。具体策略如下：
1.如果一个时间单元上没有第一资源，则在该时间单元上，CORESET中CCE包含的REG是分散分布的。
2.如果一个时间单元上有第一资源，则在该时间单元上，CORESET中CCE包含的REG是集中分布的。
假设eMBB的控制资源集合属于第一资源，时间单元是符号。以配置URLLC的控制资源集合为例，结合图11说明实施例二的2种策略：
如图11所示，第3、4个符号上没有eMBB的控制资源集合，则在第3、4个符号上，CCE包含的REG在是分散分布的。CCE中REG bundle包含2个或3个REG。这样可以获得更多的频率分集增益。
如图11所示，第1、2个符号上有eMBB的控制资源集合，则在第1、2个符号上，CCE包含的REG是集中分布的。CCE中REG bundle包含6个REG。这样可以尽量避免和eMBB的控制资源集合冲突。
这里，CCE包含的REG可以呈现两种集中分布的方式：1.如图11中CCE2所示，CCE包含的REG在频域上连续集中分布；2.如图11中CCE1所示，CCE包含的REG在频域上位置相同，在时域上连续集中分布。
实施例二中，可以通过CCE中REG bundle的大小来指示网络设备配置的是上述第1种策略对应的控制信道参数，还是上述第2种策略对应的控制信道参数。可以理解的，在NR系统中，当REG bundle包含6个REG时，CCE中的REG是集中分布的。当REG bundle包含2或3个REG时，CCE中的REG是分散分布的。
实施例二中，所述第一配置信息可包括CCE中REG bundle所包含的REG的数量，即一组第二资源组所包含的第二资源组的数量。不限于此，所述第一配置信息还可包括其他可用于指示CCE和REG映射方式的信息，这里不作限制。
实施例二中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
可以理解的，实施例二中，网络设备根据时间单元上有没有第一资源来确定控制资源集合中CCE和REG映射方式，尽量避免控制资源集合与第一资源冲突，也可以提高PDCCH的频率分集增益。
(三)实施例三
本实施例中，网络设备可以根据时间单元上是否有第一资源来确定该时间单元上CORESET中CCE到PDCCH的映射方式。本实施例中，不同控制信道参数是指CORESET中CCE到PDCCH的映射方式不同。不同的控制信道参数中，CORESET的资源位置可以 相同，也可以不同。具体策略如下：
1.如果一个时间单元上没有第一资源，则在该时间单元上，CORESET中PDCCH包含的CCE是分散分布的。
2.如果一个时间单元上有第一资源，则在该时间单元上，CORESET中PDCCH包含的CCE是集中分布的。
结合图12A-12B说明实施例三的2种策略：
如图12A所示，如果时间单元上没有第一资源(如空白资源)，则在该时间单元上，聚合等级为4(AL＝4)的PDCCH包含的CCE在频域上是分散分布的。这样可以获得更多的频率分集增益。
如图12B所示，如果时间单元上有第一资源(如空白资源)，则在该时间单元上，聚合等级为4(AL＝4)或聚合等级为8(AL＝8)的PDCCH包含的CCE在频域上是集中分布的。这样可以尽量避免和第一资源冲突。
实施例三中，所述第一配置信息可包括用于指示候选物理下行控制信道对应L个频域上连续的所述第一资源组的指示信息，或者用于指示候选物理下行控制信道对应L个频域上分散的所述第一资源组的指示信息。这里，L是正整数，表示候选物理下行控制信道的聚合等级。不限于此，控制信道参数还可包括其他可用于指示CCE到PDCCH的映射方式的信息，这里不作限制。
实施例三中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
可以理解的，实施例三中，网络设备根据时间单元上有没有第一资源来确定控制资源集合中CCE到PDCCH的映射方式，尽量避免控制资源集合与第一资源冲突，也可以提高频率分集增益。
另外，应理解的，如果通过实施例二确定REG到CCE的映射方式是分散映射(实施例二中的策略1采用的映射方式)，那么，无需实施实施例三，CCE到PDCCH的映射方式也会是分散映射，因为构成PDCCH的基本单元CCE在物理资源上是分散映射的。
(四)实施例四
首先，需要了解的是，在NR中，为了复用信道估计，同一个用户的search space中的多个PDCCH candidate映射在物理资源上时会采用嵌套结构。也即是说，为了复用信道估计，不同聚合等级的PDCCH candidate会嵌套式的共享资源。在共享资源上，只需进行一次信道估计即可，无需重复进行信道估计。而且，多个聚合等级对应的总的search space会变小。
图13A和图13B分别示例性的示出了两种嵌套式的资源共享方式。下面分别说明。
第一种资源共享方式：不同聚合等级的PDCCH candidate所使用的时频资源都尽量重合。即，全部的不同聚合等级的PDCCH candidate所使用的时频资源的位置即占用资源最多的一种聚合等级的PDCCH candidate所使用的时频资源的位置。
如图13A所示，2个聚合等级为8(AL＝8)的PDCCH candidate占用的时频资源最多， 共16个CCE。图13A中全部的不同聚合等级的PDCCH candidate所使用的时频资源的位置即这2个聚合等级为8(AL＝8)的PDCCH candidate占用的时频资源的位置。图13A中，全部的不同聚合等级的PDCCH candidate包括：2个聚合等级为8(AL＝8)的PDCCH candidate、2个聚合等级为4(AL＝4)的PDCCH candidate、6个聚合等级为2(AL＝2)的PDCCH candidate、6个聚合等级为1(AL＝1)的PDCCH candidate。
第二种资源共享方式：将全部的不同聚合等级的PDCCH candidate分成两组或更多组。在每一组中均采用第一种资源共享方式。
如图13B所示，全部的不同聚合等级的PDCCH candidate分成了两组：组A和组B。其中，组A包括AL＝8和AL＝4的PDCCH candidate，组B包括AL＝2和AL＝1的PDCCH candidate。在组A中，AL＝8和AL＝4的PDCCH candidate所使用的时频资源的位置即AL＝8的PDCCH candidate所使用的时频资源的位置。在组B中，AL＝8和AL＝4的PDCCH candidate所使用的时频资源的位置即AL＝8的PDCCH candidate所使用的时频资源的位置。
从图13A和图13B可以看出，上述两种资源共享方式中，不同聚合等级的PDCCH candidate所使用的时频资源的位置是不一样的。在获知不同聚合等级的PDCCH candidate所使用的时频资源的位置的条件下，终端可以分析出不同聚合等级的PDCCH candidate采用的资源共享方式是上述第一种资源共享方式还是上述第二种资源共享方式。
应理解的，上述第一种资源共享方式能够更大程度的复用信道估计。上述第二种资源共享方式能够降低阻塞概率。
本实施例中，网络设备可以根据时间单元上是否有第一资源来确定该时间单元上CORESET中不同聚合等级的PDCCH candidate所使用的时频资源的位置，即确定该时间单元上CORESET中不同聚合等级的PDCCH candidate采用的资源共享方式。本实施例中，不同控制信道参数是指CORESET中不同聚合等级的PDCCH candidate采用的资源共享方式不同。不同的控制信道参数中，CORESET的资源位置可以相同，也可以不同。具体策略如下：
1.如果一个时间单元上没有第一资源，则在该时间单元上，CORESET中不同聚合等级的PDCCH candidate采用的上述第二种资源共享方式。这样，能够降低阻塞概率。
2.如果一个时间单元上有第一资源，则在该时间单元上，CORESET中不同聚合等级的PDCCH candidate采用的上述第一种资源共享方式。这样，可以降低阻塞概率。
实施例四中，所述第一配置信息可包括所述控制资源集合中的资源(如CCE)索引，以及映射在所述资源上的一种或多种聚合等级的候选物理下行控制信道。这样，根据该资源索引，终端可以分析出不同聚合等级的PDCCH candidate所用的资源的位置，最后确定不同聚合等级的PDCCH candidate采用的是哪一种资源共享方式。不限于此，控制信道参数还可包括其他可用于指示不同聚合等级的PDCCH candidate所采用的资源共享方式的信息，这里不作限制。
可选的，所述第一配置信息也可包括：上述第一种资源共享方式的指示信息或上述第二种资源共享方式的指示信息。例如，在所述第一配置信息中设置一个指示资源共享方式的标志位。当该标志位为“1”时，指示上述第一种资源共享方式。当该标志位为“0”时，指示上述第二种资源共享方式。示例仅仅用于解释本申请，不应构成限定。
实施例四中，网络设备可以通过高层信令(如RRC信令)发送所述第一配置信息，也可以通过物理层信令(如DCI)发送所述第一配置信息。关于所述第一配置信息的信令实现，本实施例不作限制。
可以理解的，实施例四中，网络设备根据时间单元上有没有第一资源来确定控制资源集合中不同聚合等级的PDCCH candidate所采用的资源共享方式，可以尽量提高频率分集增益，也可以更大程度的复用信道估计。
另外，本申请还提供了两种配置控制信道参数的方法。下面结合图14A和图14B来分别描述这两种方法。
如图14A所示，控制资源集合(CORESET)在不同时间单元上的资源位置可以都相同。当一个时间单元上有第一资源(如PBCH使用的资源)时，在该符号上控制资源集合可以分别分布在第一资源两侧，类似“绕过”第一资源。
如图14B所示，控制资源集合(CORESET)在不同时间单元上的资源位置可以都相同。当一个时间单元上有第一资源(如PBCH使用的资源)时，在该符号上控制资源集合可以丢弃映射在第一资源上的数据，类似对控制资源集合进行了“打孔”。
具体的，第一配置信息还可包括一个指示信息，该指示信息用于指示控制信道参数在有第一资源的时间单元上是采用图14A所示的方式，还是采用图14B所示的方式。
参见图15，图15示出了本申请提供一种无线通信系统、终端及网络设备。无线通信系统10包括：终端400和网络设备500。其中，终端400可以为图4实施例中的终端200，网络设备500可以为图5实施例中的网络设备300，无线通信系统10可以是图3描述的无线通信系统100。下面分别描述。
如图15所示，终端400可包括：处理单元401和通信单元403。其中：
通信单元403可用于接收来自网络设备500的第一配置信息，所述第一配置信息包括至少两套控制信道参数。其中，所述至少两套控制信道参数中的每一套控制信道参数对应至少一个时间单元的信息。
处理单元401可用于根据所述时间单元的索引的和所述第一配置信息，确定出所述时间单元的索引对应的控制信道参数。这里，所述时间单元的索引属于所述至少两套控制信道参数对应的时间单元。
具体的，关于终端400包括的各个功能单元的具体实现可参考前述各个实施例，这里不再赘述。
如图15所示，网络设备500可包括：通信单元501和处理单元503。其中：
处理单元503可用于配置至少两套控制信道参数。其中，所述至少两套控制信道参数中的每一套控制信道参数对应至少一个时间单元的信息。
通信单元501可用于向终端400发送第一配置信息，所述第一配置信息包括所述至少两套控制信道参数。
具体的，关于网络设备500包括的各个功能单元的具体实现可参考前述各个实施例，这里不再赘述。
综上，本申请中，网络设备确定多个时间单元各自对应的控制信道参数，并向终端发送指示信息，用于指示网络设备配置给终端的至少2套控制信道参数。相应的，终端可以根据该指示信息和一个(些)时间单元确定这一个(些)时间单元对应的控制信道参数。上述方案可实现控制信道参数的灵活配置。
可以理解的是，当本申请的实施例应用于网络设备芯片时，该网络设备芯片实现上述方法实施例中网络设备的功能。该网络设备芯片向网络设备中的其它模块(如射频模块或天线)发送上述第一配置信息。该第一配置信息经由网络设备的其它模块发送给终端。
当本申请的实施例应用于终端备芯片时，该终端芯片实现上述方法实施例中终端的功能。该终端芯片从终端中的其它模块(如射频模块或天线)接收上述第一配置信息，该第一配置信息是网络设备发送给终端的。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。

Claims (29)

  1. 一种信号传输方法，其特征在于，包括：
    接收来自网络设备的第一配置信息，所述第一配置信息包括至少两套控制信道参数；其中，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应；
    根据所述时间单元的索引和所述第一配置信息，确定出所述索引表征的时间单元对应的控制信道参数。
  2. 如权利要求1所述的方法，其特征在于，所述控制信道参数包括控制资源集合对应的资源位置；所述控制资源集合对应的资源位置包括：所述控制资源集合对应的资源起始位置和资源结束位置，或者所述控制资源集合对应的资源起始位置和所述控制资源集合对应的资源跨度。
  3. 如权利要求1或2所述的方法，其特征在于，所述控制信道参数包括控制资源集合中第一资源组与第二资源组之间的映射方式；一个所述第一资源组包括至少一个所述第二资源组；所述第一资源组与第二资源组之间的映射方式包括：所述第一资源组中的一个第三资源组所包含的第二资源组的数量，其中，所述第一资源组包括至少一个所述第三资源组，所述第三资源组包括至少一个所述第二资源组。
  4. 如权利要求1-3中任一项所述的方法，其特征在于，所述控制信道参数包括候选物理下行控制信道与第一资源组之间的映射方式；一个所述候选物理下行控制信道承载在至少一个所述第一资源组上；所述候选物理下行控制信道与第一资源组之间的映射方式包括：
    候选物理下行控制信道映射到L个频域上连续的所述第一资源组，或者
    候选物理下行控制信道映射到L个频域上分散的所述第一资源组，
    其中，L为正整数，表示候选物理下行控制信道的聚合等级。
  5. 如权利要求1-4中任一项所述的方法，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所使用的资源的位置；所述控制信道参数具体包括：所述控制资源集合中的资源索引，以及映射在所述资源上的一种或多种聚合等级的候选物理下行控制信道。
  6. 如权利要求1-4中任一项所述的方法，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所采用的资源共享方式；所述控制信道参数具体包括：第一种资源共享方式的指示信息，或者第二种资源共享方式的指示信息；
    其中，所述第一种资源共享方式中全部的不同聚合等级的候选物理下行控制信道所使用的资源的位置即占用资源最多的一种聚合等级的候选物理下行控制信道所使用的资源的位置的部分或全部；所述第二种资源共享方式中全部的不同聚合等级的候选物理下行控制信道被分成两组或更多组，每一组均采用所述第一种资源共享方式。
  7. 如权利要求1-6中任一项所述的方法，其特征在于，所述时间单元为以下中的一种：时域符号、微时隙、时隙、子帧和帧。
  8. 一种信号传输方法，其特征在于，包括：
    确定至少两套控制信道参数；其中，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应；
    向终端发送第一配置信息，所述第一配置信息包括所述至少两套控制信道参数。
  9. 如权利要求8所述的方法，其特征在于，所述控制信道参数包括控制资源集合对应的资源位置；所述控制资源集合对应的资源位置包括：所述控制资源集合对应的资源起始位置和资源结束位置，或者所述控制资源集合对应的资源起始位置和所述控制资源集合对应的资源跨度。
  10. 如权利要求8或9所述的方法，其特征在于，所述控制信道参数包括控制资源集合中第一资源组与第二资源组之间的映射方式；一个所述第一资源组包括至少一个所述第二资源组；所述第一资源组与第二资源组之间的映射方式包括：所述第一资源组中一个第三资源组所包含的第二资源组的数量，其中，所述第一资源组包括至少一个所述第三资源组，所述第三资源组包括至少一个所述第二资源组。
  11. 如权利要求8-10中任一项所述的方法，其特征在于，所述控制信道参数包括候选物理下行控制信道与第一资源组之间的映射方式；一个所述候选物理下行控制信道承载在至少一个所述第一资源组上；所述候选物理下行控制信道与第一资源组之间的映射方式包括：
    候选物理下行控制信道映射到L个频域上连续的所述第一资源组，或者
    候选物理下行控制信道映射到L个频域上分散的所述第一资源组，
    其中，L为正整数，表示候选物理下行控制信道的聚合等级。
  12. 如权利要求8-11中任一项所述的方法，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所使用的资源的位置；所述控制信道参数具体包括：所述控制资源集合中的资源索引，以及映射在所述资源上的一种或多种聚合等级的候选物理下行控制信道。
  13. 如权利要求8-11中任一项所述的方法，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所采用的资源共享方式；所述控制信道参数具体包括：第一种资源共享方式的指示信息，或者第二种资源共享方式的指示信息；
    其中，所述第一种资源共享方式中全部的不同聚合等级的候选物理下行控制信道所使用的资源的位置即占用资源最多的一种聚合等级的候选物理下行控制信道所使用的资源的位置的部分或全部；所述第二种资源共享方式中全部的不同聚合等级的候选物理下行控制信道被分成两组或更多组，每一组均采用所述第一种资源共享方式。
  14. 如权利要求8-13所述的方法，其特征在于，所述时间单元为以下中的一种：时域符号、微时隙、时隙、子帧和帧。
  15. 一种终端，其特征在于，包括：
    通信单元，用于接收来自网络设备的第一配置信息，所述第一配置信息包括至少两套控制信道参数；其中，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应；
    处理单元，用于根据所述时间单元的索引的和所述第一配置信息，确定出所述索引表征的时间单元对应的控制信道参数。
  16. 如权利要求15所述的终端，其特征在于，所述控制信道参数包括控制资源集合对应的资源位置；所述控制资源集合对应的资源位置包括：所述控制资源集合对应的资源起 始位置和资源结束位置，或者所述控制资源集合对应的资源起始位置和所述控制资源集合对应的资源跨度。
  17. 如权利要求15或16所述的终端，其特征在于，所述控制信道参数包括控制资源集合中第一资源组与第二资源组之间的映射方式；一个所述第一资源组包括至少一个所述第二资源组；所述第一资源组与第二资源组之间的映射方式包括：所述第一资源组中的一个第三资源组所包含的第二资源组的数量，其中，所述第一资源组包括至少一个所述第三资源组，所述第三资源组包括至少一个所述第二资源组。
  18. 如权利要求15-17中任一项所述的终端，其特征在于，所述控制信道参数包括候选物理下行控制信道与第一资源组之间的映射方式；一个所述候选物理下行控制信道承载在至少一个所述第一资源组上；所述候选物理下行控制信道与第一资源组之间的映射方式包括：
    候选物理下行控制信道映射到L个频域上连续的所述第一资源组，或者
    候选物理下行控制信道映射到L个频域上分散的所述第一资源组，
    其中，L为正整数，表示候选物理下行控制信道的聚合等级。
  19. 如权利要求15-18中任一项所述的终端，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所使用的资源的位置；所述控制信道参数具体包括：所述控制资源集合中的资源索引，以及映射在所述资源上的一种或多种聚合等级的候选物理下行控制信道。
  20. 如权利要求15-18中任一项所述的终端，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所采用的资源共享方式；所述控制信道参数具体包括：第一种资源共享方式的指示信息，或者第二种资源共享方式的指示信息；
    其中，所述第一种资源共享方式中全部的不同聚合等级的候选物理下行控制信道所使用的资源的位置即占用资源最多的一种聚合等级的候选物理下行控制信道所使用的资源的位置的部分或全部；所述第二种资源共享方式中全部的不同聚合等级的候选物理下行控制信道被分成两组或更多组，每一组均采用所述第一种资源共享方式。
  21. 如权利要求15-20中任一项所述的终端，其特征在于，所述时间单元为以下中的一种：时域符号、微时隙、时隙、子帧和帧。
  22. 一种网络设备，其特征在于，包括：
    处理单元，用于确定至少两套控制信道参数；其中，所述至少两套控制信道参数中的每一套控制信道参数均与至少一个时间单元相对应；
    通信单元，用于向终端发送第一配置信息，所述第一配置信息包括所述至少两套控制信道参数。
  23. 如权利要求22所述的网络设备，其特征在于，所述控制信道参数包括控制资源集合对应的资源位置；所述控制资源集合对应的资源位置包括：所述控制资源集合对应的资源起始位置和资源结束位置，或者所述控制资源集合对应的资源起始位置和所述控制资源集合对应的资源跨度。
  24. 如权利要求22或23所述的网络设备，其特征在于，所述控制信道参数包括控制资源集合中第一资源组与第二资源组之间的映射方式；一个所述第一资源组包括至少一个 所述第二资源组；所述第一资源组与第二资源组之间的映射方式包括：所述第一资源组中一个第三资源组所包含的第二资源组的数量，其中，所述第一资源组包括至少一个所述第三资源组，所述第三资源组包括至少一个所述第二资源组。
  25. 如权利要求22-24中任一项所述的网络设备，其特征在于，所述控制信道参数包括候选物理下行控制信道与第一资源组之间的映射方式；一个所述候选物理下行控制信道承载在至少一个所述第一资源组上；所述候选物理下行控制信道与第一资源组之间的映射方式包括：
    候选物理下行控制信道映射到L个频域上连续的所述第一资源组，或者
    候选物理下行控制信道映射到L个频域上分散的所述第一资源组，
    其中，L为正整数，表示候选物理下行控制信道的聚合等级。
  26. 如权利要求22-25中任一项所述的网络设备，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所使用的资源的位置；所述控制信道参数具体包括：所述控制资源集合中的资源索引，以及映射在所述资源上的一种或多种聚合等级的候选物理下行控制信道。
  27. 如权利要求22-26中任一项所述的网络设备，其特征在于，所述控制信道参数包括控制资源集合中不同聚合等级的候选物理下行控制信道所采用的资源共享方式；所述第一配置信息包括：第一种资源共享方式的指示信息，或者第二种资源共享方式的指示信息；
    其中，所述第一种资源共享方式中全部的不同聚合等级的候选物理下行控制信道所使用的资源的位置即占用资源最多的一种聚合等级的候选物理下行控制信道所使用的资源的位置的部分或全部；所述第二种资源共享方式中全部的不同聚合等级的候选物理下行控制信道被分成两组或更多组，每一组均采用所述第一种资源共享方式。
  28. 如权利要求22-27中任一项所述的网络设备，其特征在于，所述时间单元为以下中的一种：时域符号、微时隙、时隙、子帧和帧。
  29. 一种通信系统，其特征在于，包括：终端和网络设备，其中：
    所述终端是权利要求15-21中任一项所述的终端；
    所述网络设备是权利要求22-28中任一项所述的网络设备。
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