WO2018196866A1 - 通信方法、网络设备和用户设备 - Google Patents

通信方法、网络设备和用户设备 Download PDF

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Publication number
WO2018196866A1
WO2018196866A1 PCT/CN2018/085000 CN2018085000W WO2018196866A1 WO 2018196866 A1 WO2018196866 A1 WO 2018196866A1 CN 2018085000 W CN2018085000 W CN 2018085000W WO 2018196866 A1 WO2018196866 A1 WO 2018196866A1
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Prior art keywords
search space
space resource
common search
resource
common
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PCT/CN2018/085000
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English (en)
French (fr)
Inventor
李俊超
唐浩
汪凡
唐臻飞
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华为技术有限公司
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Publication of WO2018196866A1 publication Critical patent/WO2018196866A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present application relates to the field of communications and, more particularly, to communication methods, network devices, and user equipment.
  • the common search space resources are predefined, and the User Equipment (UE) specific search space resources are predefined or configured based on the network side. Since the minimum UE bandwidth capability in the cell in LTE is not less than the system bandwidth, that is, the working bandwidth of the UE is the system bandwidth, all UEs can simultaneously monitor the common search space and the UE-specific search space.
  • LTE Long Term Evolution
  • UE User Equipment
  • the system bandwidth is different from the system bandwidth in the LTE system. If the UE-specific search space is predefined or configured according to the existing scheme, the UE may be caused. It is not possible to monitor both the common search space and the UE-specific search space.
  • the application provides a communication method, a network device, and a user equipment, so that the UE can simultaneously monitor a common search space and a UE-specific search space.
  • a communication method comprising:
  • the network device determines the UE-specific search space resource according to the maximum bandwidth of the user equipment UE and the common search space resource;
  • the network device sends configuration information to the UE, where the configuration information is used to indicate the UE-specific search space resource.
  • the common search space resource and the UE specific search space resource all refer to the frequency domain resource.
  • the configuration parameter corresponding to the common search space resource is the same as the configuration parameter corresponding to the UE-specific search space resource.
  • the configuration parameter may include at least one of a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of the transmission time unit. It should be understood that the configuration parameter may also be referred to as a system parameter set or other name, which is not limited by the embodiment of the present invention.
  • the maximum bandwidth of the UE is less than or equal to the maximum bandwidth that the UE can support.
  • the maximum bandwidth of the UE here is the maximum bandwidth that the UE or the base station expects the UE to support
  • the maximum bandwidth that the UE can support is the maximum bandwidth that the UE can theoretically provide (also referred to as the maximum bandwidth capability of the UE).
  • the UE is configured to UE-specific search space resources according to the maximum bandwidth of the UE and the common search space resource, so that the UE can simultaneously monitor the common search space and the UE-specific search space.
  • the UE uses the common search space to detect common downlink control information and/or UE-specific downlink control information, and uses the UE-specific search space to detect UE-specific downlink control information.
  • the common downlink control information is downlink control information that is scrambled by a Radio Network Temporary Identity (RNTI).
  • RNTI Radio Network Temporary Identity
  • the common RNTI is a public parameter of a pre-defined or network device configured to all UEs of a cell or a group of UEs, including a System Information Radio Network Temporary Identifier (SI-RNTI), and a paging wireless network temporary Paging Radio Network Temporary Identify (P-RNTI), Random Access Radio Network Temporary Identify (RA-RNTI), and the like.
  • SI-RNTI System Information Radio Network Temporary Identifier
  • P-RNTI paging wireless network temporary Paging Radio Network Temporary Identify
  • RA-RNTI Random Access Radio Network Temporary Identify
  • the UE-specific downlink control information is downlink control information that is scrambled by a UE-specific Radio Network Tempory Identity (RNTI).
  • RNTI Radio Network Tempory Identity
  • the UE-specific RNTI is a parameter configured by the network device to a specific UE in the cell, including a Cell Radio Network Temporary Identifier (C-RNTI), a Temporary C-RNTI (Temporary C-RNTI), and a semi-static Scheduled C-RNTI (Semi-Persistent Scheduling C-RNTI, SPS C-RNTI) and the like.
  • C-RNTI Cell Radio Network Temporary Identifier
  • Temporary C-RNTI Temporary C-RNTI
  • SPS C-RNTI semi-static Scheduled C-RNTI
  • the common search space resource may be configured by a Master Information Block (MIB) or implicitly indicated by initial access information.
  • the initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, and the synchronization signal block may include a primary synchronization signal (Primary SS) and/or a secondary synchronization signal (Secondary SS), and may also include an MIB.
  • one or more candidate resources of the common search space resource may be implicitly indicated by initial access information (such as a time-frequency resource of the synchronization signal block), and then indicated by the MIB in the one or more candidate resources.
  • initial access information such as a time-frequency resource of the synchronization signal block
  • MIB the MIB in the one or more candidate resources.
  • a candidate resource is used as the common search space resource.
  • the sending, by the network device, the configuration information to the UE includes:
  • the network device sends Radio Resource Control (RRC) signaling to the UE, where the RRC signaling includes the configuration information. That is, the network device can configure the UE-specific search space resource for the UE through RRC signaling.
  • RRC Radio Resource Control
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain is less than or equal to a maximum bandwidth of the UE.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain refers to: the bandwidth of the UE-specific search space resource in the frequency domain, and the frequency of the common search space resource.
  • the bandwidth on the domain and the interval bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain refers to: the bandwidth of the UE-specific search space resource in the frequency domain, and the frequency of the common search space resource.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain refers to: a highest resource block (RB) of the UE-specific search space resource and the common search space.
  • RB resource block
  • the sequence number of the lowest resource block RB of the common search space resource and the sequence number of the lowest RB of the UE-specific search space resource satisfy the following relationship:
  • the sequence number of the lowest RB of the common search space resource a sequence number of the lowest RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the transmission of the UE-specific search space resource in the frequency domain
  • the number of RBs corresponding to the bandwidth where W is the number of RBs corresponding to the maximum bandwidth of the UE, and v ⁇ W.
  • the sequence number of the center RB of the UE-specific search space resource and the sequence number of the lowest RB of the common search space resource satisfy the following relationship:
  • the sequence number of the lowest RB of the common search space resource a sequence number of the center RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the transmission of the UE-specific search space resource in the frequency domain
  • the number of RBs of the bandwidth, W is the number of RBs corresponding to the maximum bandwidth of the UE, v ⁇ W, and when v is even, the center RB of the UE-specific search space resource is the UE-specific search space resource
  • w, v can be configured or predefined, It can be predefined or configured via MIB.
  • the center RB of the UE-specific search space resource is the v/2 RB in the RB corresponding to the transmission bandwidth on the frequency domain
  • the lowest RB of the common search space resource The sequence number and the sequence number of the center RB of the UE-specific search space resource satisfy the following relationship:
  • sequence number of the lowest RB of the UE-specific search space resource The sequence number of the lowest RB with the common search space resource Meet the following relationship:
  • sequence number of the highest RB of the UE-specific search space resource The sequence number of the lowest RB with the common search space resource Meet the following relationship:
  • the common search space resource is a subset of the UE-specific search space resources. This configuration ensures that UEs with different maximum bandwidths can simultaneously monitor the common search space and the UE-specific search space.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of the maximum bandwidths of multiple UEs in the cell.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of the maximum bandwidth of all UEs or a group of UEs in the cell. This ensures that these UEs within the cell are able to monitor the common search space resources.
  • the method before the determining, by the network device, the UE-specific search space resource configured for the UE, according to the maximum bandwidth of the user equipment UE and the common search space resource, the method further includes:
  • the network device receives the indication information reported by the UE, where the indication information is used to indicate a maximum bandwidth of the UE.
  • the common search space resource includes a synchronization signal block, and a sequence number of a center RB of the common search space resource and a sequence number of a lowest RB of the synchronization signal block satisfy the following relationship:
  • W min is the number of RBs corresponding to the minimum value of the maximum bandwidth of the plurality of UEs in the cell
  • w is the transmission bandwidth corresponding to the common search space resource in the frequency domain
  • the number of RBs, m is the number of RBs of the synchronization signal block, w ⁇ W min , and when w is an even number, the center RB of the common search space resource is the common search space resource in the frequency domain
  • w can be configured or predefined, m and Can be predefined.
  • the common search if w is an even number, and the central RB of the common search space resource is the w/2 RB in the RB corresponding to the transmission bandwidth of the common search space resource in the frequency domain, the common search
  • the sequence number of the center RB of the spatial resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • sequence number of the lowest RB of the common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • sequence number of the highest RB of the common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • a communication method comprising:
  • the user equipment UE receives the configuration information sent by the network device, where the configuration information is used to indicate the UE-specific search space resource configured for the UE, where the UE-specific search space resource is based on the maximum bandwidth of the UE and the common search space resource. definite;
  • the UE uses the UE-specific search space resource to detect UE-specific downlink control information according to the configuration information.
  • the UE can simultaneously monitor the common search space and the UE-specific search space according to the UE-specific search space resources configured on the network side.
  • the configuration parameter corresponding to the common search space resource is the same as the configuration parameter corresponding to the UE-specific search space resource.
  • the configuration parameter may include at least one of a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of the transmission time unit. It should be understood that the configuration parameter may also be referred to as a system parameter set or other name, which is not limited by the embodiment of the present invention.
  • the transmission time unit may be a time unit such as a time slot, a time slot aggregation, a minislot, or a minislot aggregation, which is not limited in this embodiment of the present invention.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain is less than or equal to a maximum bandwidth of the UE.
  • the sequence number of the lowest resource block RB of the common search space resource and the sequence number of the lowest RB of the UE-specific search space resource satisfy the following relationship:
  • the sequence number of the lowest RB of the common search space resource a sequence number of the lowest RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the transmission of the UE-specific search space resource in the frequency domain
  • the number of RBs corresponding to the bandwidth where W is the number of RBs corresponding to the maximum bandwidth of the UE, and v ⁇ W.
  • the sequence number of the center RB of the UE-specific search space resource and the sequence number of the lowest RB of the common search space resource satisfy the following relationship:
  • the sequence number of the lowest RB of the common search space resource a sequence number of the center RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the corresponding transmission bandwidth of the UE-specific search space resource in the frequency domain.
  • w, v can be configured or predefined, It can be predefined or configured via MIB.
  • the central RB of the UE-specific search space resource is the v/2 RB of the RBs corresponding to the transmission bandwidth of the UE-specific search space resource in the frequency domain
  • the sequence number of the lowest RB of the common search space resource and the sequence number of the center RB of the UE-specific search space resource satisfy the following relationship:
  • sequence number of the lowest RB of the common search space resource The sequence number of the lowest RB with the UE-specific search space resource Meet the following relationship:
  • sequence number of the lowest RB of the common search space resource The sequence number of the highest RB with the UE-specific search space resource Meet the following relationship:
  • the common search space resource is a subset of the UE-specific search space resources. This configuration ensures that UEs with different maximum bandwidths can simultaneously monitor the common search space and the UE-specific search space.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of the maximum bandwidths of multiple UEs in the cell.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum of the maximum bandwidth of all UEs or a group of UEs in the cell. This ensures that all of the UEs in the cell are able to monitor the common search space resources.
  • the method further includes:
  • the UE sends indication information to the network device, where the indication information is used to indicate a maximum bandwidth of the UE.
  • the common search space resource includes a synchronization signal block, and a sequence number of a center RB of the common search space resource and a sequence number of a lowest RB of the synchronization signal block satisfy the following relationship:
  • W min is the number of RBs corresponding to the minimum value of the maximum bandwidth of the plurality of UEs in the cell
  • w is the transmission bandwidth corresponding to the common search space resource in the frequency domain
  • the number of RBs, m is the number of RBs of the synchronization signal block, w ⁇ W min , and when w is an even number, the center RB of the common search space resource is the common search space resource in the frequency domain
  • w can be configured or predefined, m and Can be predefined.
  • the common search if w is an even number, and the central RB of the common search space resource is the w/2 RB in the RB corresponding to the transmission bandwidth of the common search space resource in the frequency domain, the common search
  • the sequence number of the center RB of the spatial resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • sequence number of the lowest RB of the common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • sequence number of the highest RB of the common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • a communication method comprising:
  • the UE does not simultaneously monitor the common search space resource and the UE-specific search space resource;
  • the UE does not simultaneously monitor the common search space resource and the UE-specific search space resource.
  • the embodiment of the present invention is applicable to a scenario in which a large-bandwidth or multi-configuration parameter is transmitted in parallel, and can support the UE with different capabilities to blindly check the public downlink control information and the UE-specific downlink control information, which helps reduce the number of blind detections of UEs with different capabilities.
  • the common downlink control information is downlink control information that is scrambled by a Radio Network Temporary Identity (RNTI).
  • the public RNTI includes a System Information Radio Network Temporary Identifier (SI-RNTI), a Paging Radio Network Temporary Identify (P-RNTI), and a random access wireless network. Identification (Random Access Radio Network Temporary Identify, RA-RNTI) and the like.
  • the UE-specific downlink control information is downlink control information that is scrambled by a UE-specific Radio Network Temporary Identity (RNTI).
  • the UE-specific RNTI includes a Cell Radio Network Temporary Identifier (C-RNTI), a Temporary C-RNTI (Temporary C-RNTI), and a Semi-Persistent Scheduling C-Semi-Persistent Scheduling C- RNTI, SPS C-RNTI), etc.
  • the common search space resource may be configured by a Master Information Block (MIB) or implicitly indicated by initial access information.
  • the initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, and the synchronization signal block may include a primary synchronization signal (Primary SS) and/or a secondary synchronization signal (Secondary SS), and may also include an MIB.
  • one or more candidate resources of the common search space resource may be implicitly indicated by initial access information (such as a time-frequency resource of the synchronization signal block), and then indicated by the MIB in the one or more candidate resources.
  • initial access information such as a time-frequency resource of the synchronization signal block
  • MIB the MIB in the one or more candidate resources.
  • a candidate resource is used as the common search space resource.
  • the configuration parameter corresponding to the common search space resource may be predefined or indicated by the MIB.
  • the second configuration information described above may be the above-mentioned main information block or initial access information.
  • the UE-specific search space resource may be configured by using Radio Resource Control (RRC) signaling, and the configuration parameter corresponding to the UE-specific search space resource may also be configured by using RRC signaling.
  • RRC Radio Resource Control
  • the configuration parameter may include at least one of a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of the transmission time unit. It should be understood that the configuration parameter may also be referred to as a system parameter set or other name, which is not limited by the embodiment of the present invention.
  • the transmission time unit may be a time unit such as a time slot, a time slot aggregation, a minislot or a minislot aggregation, which is not limited in this embodiment of the present invention.
  • the first configuration information described above may be the RRC signaling described above or other signaling that may be used to configure the UE-specific search space resource.
  • the UE does not simultaneously monitor the common search space resource and the UE specific search space resource, including:
  • the UE detects the first UE specific downlink control information and the common downlink control information by using the common search space resource in the first transmission time unit, and detects the second UE specific downlink by using the UE specific search space resource in the second transmission time unit.
  • Control information
  • the UE detects the UE-specific downlink control information by using the UE-specific search space resource in a transmission time unit, and detects only the common downlink control information by using the common search space resource in a second transmission time unit;
  • the first transmission time unit is different from the second transmission time unit.
  • the embodiment of the present invention does not limit the time sequence of the first transmission time unit and the second transmission time unit.
  • the first UE-specific downlink control information and the second UE-specific downlink control information may be the same or different, which is not limited in this embodiment of the present invention.
  • the method further includes:
  • the UE reports the indication information to the network device, where the indication information is used to indicate the maximum bandwidth of the UE and/or whether the UE supports multiple configuration parameters for parallel transmission.
  • the UE may send the indication information through a preamble sequence or a random access message 3 (Msg3).
  • Msg3 random access message 3
  • a communication method comprising:
  • the network device sends the first UE-specific downlink control information by using the common search space resource in the first transmission time unit.
  • the public downlink control information where the second common downlink control information is sent by using the UE-specific search space resource, or the network device sends the UE-specific downlink by using the UE-specific search space resource in the first transmission time unit. Controlling information, in the second transmission time unit, using the common search space resource to send common downlink control information, where the first transmission time unit is different from the second transmission time unit;
  • the network device sends the first UE-specific downlink control by using the common search space resource in the first transmission time unit.
  • the public downlink control information where the second common downlink control information is sent by using the UE-specific search space resource, or the network device sends the UE-specific using the UE-specific search space resource in the first transmission time unit.
  • Downlink control information where the second transmission time unit uses the common search space resource to send common downlink control information;
  • the first transmission time unit is different from the second transmission time unit.
  • the first UE-specific downlink control information and the second UE-specific downlink control information may be the same or different, which is not limited by the embodiment of the present invention.
  • the method further includes:
  • the network device receives the indication information reported by the UE, where the indication information is used to indicate the maximum bandwidth of the UE and/or whether the UE supports multiple configuration parameters for parallel transmission.
  • a communication method comprising:
  • the UE transmits the system message in a random access response (RAR) time window. Detecting, by using the first common search space resource, the first common downlink control information and the second common downlink control information, and using the second on a transmission time unit that does not transmit the system message in the RAR time window.
  • the public search resource detects the second public downlink control information; or
  • the UE detects the first common downlink control information by using the first common search space resource on a transmission time unit of a transmission system message in a RAR time window.
  • the second common downlink control information is used to detect the second public downlink control information by using the second common search space resource on a transmission time unit that does not transmit a system message in the RAR time window; or
  • the bandwidth of the first common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, the bandwidth of the second common search space resource in the frequency domain is greater than the maximum bandwidth of the UE, or the first common search space resource and the first If the configuration parameters corresponding to the second common search space resource are different, and the UE does not support the configuration parameter corresponding to the second common search space resource, the UE detects the first public downlink only by using the first common search space resource. Control information and the second public downlink control information; or
  • the UE detects the first common downlink control information by using the first common search space resource, and detects the second public downlink control information by using the second common search space resource.
  • the other case includes that the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.
  • the first common downlink control information includes downlink control information for scheduling a system message
  • the second common downlink control information includes downlink control information for scheduling the UE RAR.
  • the first common search space resource is used to transmit first common downlink control information and/or second common downlink control information
  • the second common search space resource is used to transmit second common downlink control information
  • the embodiment of the present invention is applicable to a scenario in which a large bandwidth or multiple configuration parameters are transmitted in parallel, and can support different capabilities of the UE to blindly check the public downlink control information.
  • the first common search space resource may be configured through an MIB or implicitly indicated by initial access information.
  • the initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, and the synchronization signal block may include a primary synchronization signal (Primary SS) and/or a secondary synchronization signal (Secondary SS), and may also include an MIB.
  • SS Synchronization Signal
  • Primary SS primary synchronization signal
  • Secondary SS secondary synchronization signal
  • one or more candidate resources of the first common search space resource may be implicitly indicated by initial access information (such as a time-frequency resource of the synchronization signal block), and then the one or more candidate resources are indicated by the MIB.
  • initial access information such as a time-frequency resource of the synchronization signal block
  • the one or more candidate resources are indicated by the MIB.
  • One of the candidate resources is used as the first common search space resource.
  • the configuration parameter corresponding to the first common search space resource may be predefined or indicated by the MIB.
  • the second common search space resource may be configured by a system message.
  • one or more candidate resources of the second common search space resource may also be implicitly indicated by initial access information (such as a time-frequency resource of the synchronization signal block), and then the one or more candidates are indicated by a system message.
  • One candidate resource in the resource is used as the second common search space resource.
  • the configuration parameter corresponding to the second common search space resource may be the same as the configuration parameter corresponding to the first common search space by default.
  • configuration parameters corresponding to the second public space search resource may be configured by using a system message.
  • the configuration parameters corresponding to the second common search space resource and the first common search space resource may be different.
  • the first common search space resource corresponds to the first configuration parameter
  • the second common search space corresponds to the second configuration parameter.
  • the configuration parameter may include at least one of a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of the transmission time unit. It should be understood that the configuration parameter may also be referred to as a system parameter set or other name, which is not limited by the embodiment of the present invention.
  • the first common search space resource includes a synchronization signal block
  • the sequence number of the center RB of the first common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • W min is the number of RBs corresponding to the minimum value of the maximum bandwidth of multiple UEs in the cell
  • w 1 is the frequency of the common search space resource in the frequency domain.
  • m is the number of RBs of the synchronization signal block
  • w 1 ⁇ W min when w is an even number, the center RB of the first common search space resource is the first public Searching for the w 1 /2+1 RBs in the RB corresponding to the transmission bandwidth of the spatial resource in the frequency domain.
  • w 1 can be configured or predefined, m and Can be predefined.
  • the center RB of the first common search space resource is the w 1 /2 RB in the RB corresponding to the transmission bandwidth of the first common search space resource in the frequency domain.
  • the sequence number of the center RB of the first common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • sequence number of the lowest RB of the first common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • sequence number of the highest RB of the first common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • the second common search space resource may or may not include a synchronization signal block.
  • the second common search space resource does not include a synchronization signal block, and the lowest RB, the center RB, or the highest RB of the second common search space resource may be any one of the system downlink bandwidths.
  • the sub-band occupied by the second common search space resource in the frequency domain is less than or equal to the minimum value W min of the maximum bandwidths of the plurality of UEs of the cell.
  • the sequence number of the lowest RB of the second common search space resource satisfies the following relationship:
  • sequence number of the center RB of the second common search space resource satisfies the following relationship:
  • sequence number of the highest RB of the second common search space resource satisfies the following relationship:
  • the number of RBs in the downlink bandwidth may be the bandwidth of the system or the bandwidth of a section of the bandwidth.
  • the first common search space resource and the second common search space resource share a partial frequency band in a frequency domain.
  • the first common search space resource and the second common search space are orthogonal in a frequency domain.
  • the second common search space resource does not include a synchronization signal block
  • the lowest RB, the center RB, or the highest RB of the second common search space resource may be any one of the system downlink bandwidths.
  • the bit overhead Y of the second common downlink control information meets the following relationship:
  • L max is the maximum number of RBs of the subband occupied by the second common search space resource in the frequency domain, The number of RBs corresponding to the downlink bandwidth of the system.
  • a communication method comprising:
  • the network device uses the transmission time unit of the transmission system message in the random access response RAR time window. Transmitting, by the first common search space resource, first common downlink control information and second common downlink control information, and transmitting, by using the second public search resource, on a transmission time unit that does not transmit a system message in the RAR time window Two public downlink control information; or,
  • the bandwidth of the first common search space resource and the second common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, the configuration parameters corresponding to the first common search space resource and the second common search space resource are different.
  • the UE does not support the multi-configuration parameter parallel transmission, and the network device sends the first public downlink control information and the second public downlink by using the first common search space resource on the transmission time unit of the transmission system message in the RAR time window. Controlling information, and transmitting the second common downlink control information by using the second common search space resource on a transmission time unit that does not transmit a system message in the RAR time window; or
  • the network device sends the first common downlink control information and the first common search space resource only by using the first common search space resource.
  • Second public downlink control information or,
  • the network device sends the first common downlink control information by using the first common search space resource, and sends the second public downlink control information by using the second common search space resource.
  • the other case includes that the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.
  • the first common downlink control information includes downlink control information for scheduling a system message
  • the second common downlink control information includes downlink control information for scheduling the UE RAR.
  • the first common search space resource is used to transmit first common downlink control information and/or second common downlink control information
  • the second common search space resource is used to transmit second common downlink control information
  • the embodiment of the present invention is applicable to a scenario in which a large bandwidth or multiple configuration parameters are transmitted in parallel, and can support different capabilities of the UE to blindly check the public downlink control information.
  • the network device may configure the first common search space resource for the UE by using the MIB, or the network device may also implicitly indicate the first common search space resource by using the initial access information that is sent.
  • the initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, and the synchronization signal block may include a primary synchronization signal (Primary SS) and/or a secondary synchronization signal (Secondary SS), and may also include an MIB.
  • SS Synchronization Signal
  • Primary SS primary synchronization signal
  • Secondary SS secondary synchronization signal
  • the network device may further implicitly indicate one or more candidate resources of the first common search space resource to the UE by using initial access information (such as a time-frequency resource of the synchronization signal block), and then sending the MIB.
  • initial access information such as a time-frequency resource of the synchronization signal block
  • the network device may configure configuration parameters corresponding to the first common search space resource for the UE by using the MIB.
  • the network device may configure the second common search space resource for the UE by using a system message, or the network device may further implicitly indicate the second common search space to the UE by using initial access information. Resources.
  • the network device may also implicitly indicate one or more candidate resources of the second common search space resource to the UE by using the sent initial access information, such as a time-frequency resource of the synchronization signal block, and then send the The system message indicates to the UE one of the one or more candidate resources as the second common search space resource.
  • the sent initial access information such as a time-frequency resource of the synchronization signal block
  • the configuration parameter corresponding to the second common search space resource may be the same as the configuration parameter corresponding to the first common search space by default.
  • the network device may configure, by using a system message, configuration parameters corresponding to the second common space search resource for the UE.
  • the configuration parameters corresponding to the second common search space resource and the first common search space resource may be different.
  • the first common search space resource corresponds to the first configuration parameter
  • the second common search space corresponds to the second configuration parameter.
  • the configuration parameter may include at least one of a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of the transmission time unit. It should be understood that the configuration parameter may also be referred to as a system parameter set or other name, which is not limited by the embodiment of the present invention.
  • the first common search space resource includes a synchronization signal block
  • the sequence number of the center PRB of the first common search space resource and the sequence number of the lowest PRB of the synchronization signal block satisfy the following relationship:
  • W min is the number of RBs corresponding to the minimum value of the maximum bandwidth of multiple UEs in the cell
  • w 1 is the frequency of the common search space resource in the frequency domain.
  • m is the number of RBs of the synchronization signal block
  • w 1 ⁇ W min when w is an even number, the center RB of the first common search space resource is the first public Searching for the w 1 /2+1 RBs in the RB corresponding to the transmission bandwidth of the spatial resource in the frequency domain.
  • w 1 can be configured or predefined, m and Can be predefined.
  • the center RB of the first common search space resource is the w 1 /2 RB in the RB corresponding to the transmission bandwidth of the first common search space resource in the frequency domain.
  • the sequence number of the center RB of the first common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • sequence number of the lowest RB of the first common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • sequence number of the highest RB of the common search space resource The sequence number of the lowest RB with the synchronization signal block Meet the following relationship:
  • the second common search space resource may or may not include a synchronization signal block.
  • the second common search space resource does not include a synchronization signal block, and the lowest RB, the center RB, or the highest RB of the second common search space resource may be any one of the system downlink bandwidths.
  • the sub-band occupied by the second common search space resource in the frequency domain is less than or equal to the minimum value W min of the maximum bandwidths of the plurality of UEs of the cell.
  • the sequence number of the lowest RB of the second common search space resource satisfies the following relationship:
  • sequence number of the center RB of the second common search space resource satisfies the following relationship:
  • sequence number of the highest RB of the second common search space resource satisfies the following relationship:
  • a sequence number of the lowest RB of the second common search space resource a sequence number of a center RB of the second common search space resource, a sequence number of the highest RB of the second common search space resource, where w 2 is the number of RBs of the subband occupied by the second common search space resource in the frequency domain, The number of RBs that are the downstream bandwidth of the system.
  • the first common search space resource and the second common search space resource share a partial frequency band in a frequency domain.
  • the first common search space resource and the second common search space are orthogonal in a frequency domain.
  • the second common search space resource does not include a synchronization signal block
  • the start RB, the center RB, or the highest RB of the second common search space resource may be any one of the system downlink bandwidths.
  • the bit overhead Y of the second common downlink control information meets the following relationship:
  • L max is the maximum number of RBs of the subband occupied by the second common search space resource in the frequency domain, The number of RBs corresponding to the downlink bandwidth of the system.
  • another communication method comprising:
  • the network device sends n system information SI messages on the same transmission time unit, where the frequency domain resources occupied by the n SI messages are different, the sending periods of the n messages are different, and n is an integer greater than or equal to 2.
  • the transmission time unit may be a time unit such as a time slot, a time slot aggregation, a minislot or a minislot aggregation, which is not limited in this embodiment of the present invention.
  • n SI messages use the same configuration parameters.
  • This configuration parameter can be predefined or indicated by a system message.
  • the method further includes:
  • the network device sends a system information block SIB1 message, and the frequency domain resources of the n SI messages are determined according to an index of the n SI messages in the SIB1 message.
  • the time windows in which the n SI messages are each have the same starting transmission time unit.
  • the initial transmission time unit may be a start frame, a start time slot or a start micro time slot.
  • the starting frame refers to the system frame at the starting position.
  • the offset of the start transmission time unit of the time window in which the n SI messages are located and the start transmission time unit of the SIB1 are predefined or configured by SIB1.
  • the value of the offset may be 0 or other values, which is not limited in this embodiment of the present invention.
  • SIB1 has the same initial transmission time unit as the n SI messages.
  • n f is the start frame of the time window in which the kth SI message is located
  • n s is the start time slot of the time window in which the kth SI message is located
  • n is a predefined value
  • T k is the first The period of the time window in which the k SI messages are located
  • ⁇ offset indicates the offset of the start time slot of the window in which the kth SI message is located with respect to the start time slot of the SIB1
  • k is greater than or equal to 2 and less than or equal to n. Integer.
  • another communication method comprising:
  • the user equipment UE receives n SI messages sent by the network device in the same transmission time unit, where the frequency domain resources of the n SI messages are different, the sending period of the n SI messages is different, and n is an integer greater than or equal to 2.
  • the transmission time unit may be a time unit such as a time slot, a time slot aggregation, a minislot or a minislot aggregation, which is not limited in this embodiment of the present invention.
  • n SI messages use the same configuration parameters.
  • This configuration parameter can be predefined or indicated by a system message.
  • the method further includes:
  • the user equipment receives the system information block SIB1 message sent by the network device, and the frequency domain resource of the n SI messages is determined according to an index of the multiple SI messages in the SIB1 message.
  • the time windows in which the n SI messages are each have the same starting transmission time unit.
  • the initial transmission time unit may be a start frame, a start time slot or a start micro time slot.
  • the starting frame refers to the system frame at the starting position.
  • the offset of the start transmission time unit of the time window in which the n SI messages are located and the start transmission time unit of the SIB1 are predefined or configured by SIB1.
  • the value of the offset may be 0 or other values, which is not limited in this embodiment of the present invention.
  • SIB1 has the same initial transmission time unit as the n SI messages.
  • n f is the start frame of the time window in which the kth SI message is located
  • n s is the start time slot of the time window in which the kth SI message is located
  • n is a predefined value
  • T k is the first The period of the time window in which the k SI messages are located
  • ⁇ offset indicates the offset of the start time slot of the window in which the kth SI message is located with respect to the start time slot of the SIB1
  • k is greater than or equal to 2 and less than or equal to n. Integer.
  • a ninth aspect provides a network device, a method for executing the foregoing network device, and specifically, the network device may include a module for performing corresponding steps of the network device.
  • the network device may include a module for performing corresponding steps of the network device.
  • a processing unit for example, a processing unit, a transmitting unit and/or a receiving unit, and the like.
  • a tenth aspect provides a user equipment, a method for the user equipment, and specifically, the user equipment may include a module for performing the corresponding steps of the user equipment.
  • the user equipment may include a module for performing the corresponding steps of the user equipment.
  • a processing unit for example, a transmitting unit, a receiving unit, and the like.
  • a network device comprising a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory, such that the network device executes the network device .
  • the network device may further include a transceiver for transmitting and receiving signals under the control of the processor.
  • a user equipment comprising a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory, such that the terminal device executes the method of the terminal device described above .
  • the user equipment may further include a transceiver for transmitting and receiving signals under the control of the processor.
  • a computer readable storage medium having instructions stored thereon that, when executed on a computer, cause the computer to perform the methods described in the above aspects.
  • a computer program product comprising instructions for causing a computer to perform the method of the above aspects when executed on a computer is provided.
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a common search space resource and a UE-specific search space resource according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a communication method according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a common search space resource and a UE-specific search space resource according to another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a communication method according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a first common search space resource and a second common search space resource according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a first common search space resource and a second common search space resource according to another embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a communication method according to another embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an SI window in a communication method according to another embodiment of the present invention.
  • FIG. 10 is a schematic diagram of an SI window in a communication method according to another embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a user equipment according to another embodiment of the present invention.
  • the network devices in the embodiments of the present invention may be different devices in different communication systems.
  • the network device may be a base station, a base station controller (BSC), a radio network controller (RNC), an evolved base station (evolved Node B, an eNB or an e-NodeB) in an LTE system, A base station (NodeB) in a WCDMA system or a gNB in a 5G system.
  • a user equipment may also be referred to as a terminal device, a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), etc.
  • the UE may communicate with the UE through the radio access network.
  • Multiple core networks communicate, for example, the UE can be a mobile phone (or "cellular" phone), a computer with communication capabilities, etc., and the UE can also be portable, pocket, handheld, computer built, or in-vehicle mobile. Device.
  • the configuration parameter may include at least one of a subcarrier spacing size, a cyclic prefix length, a transmission time unit length, a symbol length, and a symbol number of the transmission time unit. It should be understood that the configuration parameter may also be referred to as a system parameter set or other name, which is not limited by the embodiment of the present invention.
  • the transmission time unit may be a time unit such as a time slot, a time slot aggregation, a minislot or a microslot aggregation, which is not limited by the embodiment of the present invention.
  • the embodiment of the present invention provides a communication method for determining a UE-specific search space resource according to a maximum bandwidth of a UE and a common search space resource, and configuring the UE-specific search space resource for the UE, thereby facilitating the UE to simultaneously monitor the common search space resource. And UE-specific search space resources.
  • FIG. 1 is a schematic flow chart of a communication method 100 in accordance with an embodiment of the present invention. As shown in FIG. 1, method 100 includes the following.
  • the network device determines the UE-specific search space resource according to the maximum bandwidth of the UE and the common search space resource.
  • the network device sends configuration information to the UE, where the configuration information is used to indicate the specific search space resource of the UE.
  • the UE receives the configuration information.
  • the UE uses the UE-specific search space resource to detect the UE-specific downlink control information according to the received configuration information.
  • the common search space resource and the UE specific search space resource all refer to the frequency domain resource.
  • the public downlink control information may be used to schedule system messages and random access responses, and the UE-specific downlink control information may be used to schedule information about specific uplink and downlink data transmissions of the UE.
  • the maximum bandwidth of the UE is less than or equal to the maximum bandwidth that the UE can support.
  • the maximum bandwidth of the UE here is the maximum bandwidth that the UE or the base station expects the UE to support
  • the maximum bandwidth that the UE can support is the maximum bandwidth that the UE can theoretically provide (also referred to as the maximum bandwidth capability of the UE).
  • the UE is configured to UE-specific search space resources according to the maximum bandwidth of the UE and the common search space resource, so that the UE can simultaneously monitor the common search space and the UE-specific search space.
  • the common downlink control information is downlink control information scrambled by the RNTI.
  • the common RNTI is a common parameter that is configured by the predefined or network device to all UEs of the cell or a group of UEs, including SI-RNTI, P-RNTI, RA-RNTI, and the like.
  • the UE-specific downlink control information is downlink control information that is scrambled by the UE-specific RNTI.
  • the UE-specific RNTI is a parameter configured by the network device to a specific UE in the cell, including a C-RNTI, a temporary C-RNTI, an SPS C-RNTI, and the like.
  • the common search space resource may be configured through the MIB or implicitly indicated by the initial access information.
  • the initial access information may be a time-frequency resource of the SS block, and the synchronization signal block may include a primary synchronization signal (Primary SS) and/or a secondary synchronization signal (Secondary SS), and may also include an MIB.
  • Primary SS primary synchronization signal
  • Secondary SS secondary synchronization signal
  • one or more candidate resources of the spatial resource may also be commonly searched by initial access information (such as a time-frequency resource of the synchronization signal block), and then one of the one or more candidate resources is indicated by the MIB as a public search.
  • initial access information such as a time-frequency resource of the synchronization signal block
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidths of multiple UEs within the cell.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to the minimum of the maximum bandwidth of all UEs or a group of UEs in the cell. This ensures that these UEs within the cell are able to monitor the common search space resources.
  • the configuration parameters corresponding to the common search space resource may be predefined or indicated by the MIB.
  • the sending, by the network device, the configuration information to the UE in the network includes: sending, by the network device, RRC signaling to the UE, where the RRC signaling includes the configuration information. That is, the network device can configure the UE-specific search space resource for the UE through RRC signaling. Accordingly, the UE receives the RRC signaling at 130. The UE may obtain the configuration information from the RRC signaling after receiving the RRC signaling.
  • the configuration parameter corresponding to the UE-specific search space resource may also be configured by using RRC signaling.
  • the configuration parameter corresponding to the common search space resource is the same as the configuration parameter corresponding to the UE-specific search space resource.
  • the total bandwidth of the UE-specific search space resource and the common search space resource on the frequency domain is less than or equal to the maximum bandwidth of the UE.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain refers to: bandwidth of the UE-specific search space resource in the frequency domain, bandwidth of the common search space resource in the frequency domain, and UE-specific search.
  • the interval bandwidth of the spatial resource and the common search space resource in the frequency domain refers to: bandwidth of the UE-specific search space resource in the frequency domain, bandwidth of the common search space resource in the frequency domain, and UE-specific search.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain refers to: RB between the highest resource block (RB) of the UE-specific search space resource and the lowest RB of the common search space resource.
  • RB resource block
  • the common search space resource and the UE-specific search space resource share a partial frequency band in the frequency domain, and the configuration parameter corresponding to the UE-specific search space resource is the same as the configuration parameter corresponding to the common search space resource.
  • the sequence number of the center RB of the UE-specific search space resource and the sequence number of the lowest RB of the common search space resource satisfy the following relationship:
  • the sequence number of the lowest RB for the public search space resource The number of the RB of the central RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the number of RBs of the transmission bandwidth of the UE-specific search space resource in the frequency domain, W is the number of RBs corresponding to the maximum bandwidth of the UE, v ⁇ W, and when v is even, the center RB of the UE-specific search space resource is the RB in the RB corresponding to the transmission bandwidth of the UE-specific search space resource in the frequency domain. v/2+1 RBs.
  • w, v can be configured or predefined, It can be predefined or configured via MIB.
  • the sequence number of the lowest RB of the common search space resource and the UE satisfies the following relationship:
  • sequence number of the lowest RB of the UE-specific search space resource The sequence number of the lowest RB with the common search space resource Meet the following relationship:
  • sequence number of the highest RB of the UE-specific search space resource The sequence number of the lowest RB with the common search space resource Meet the following relationship:
  • the common search space resource is a subset of UE-specific search space resources. This configuration ensures that UEs with different maximum bandwidths can simultaneously monitor the common search space and the UE-specific search space.
  • the method shown in FIG. 1 may further include: the UE sending indication information to the network device, where the indication information is used to indicate a maximum bandwidth of the UE.
  • the UE may report the maximum bandwidth of the UE through the preamble sequence or the random access message 3 (Msg3).
  • the common search space resource includes a synchronization signal block
  • the sequence number of the center RB of the common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • the sequence number of the lowest RB of the synchronization signal block The number of the RB of the central RB of the common search space resource, W min is the number of RBs corresponding to the minimum value of the maximum bandwidth of the multiple UEs in the cell, and w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain.
  • m is the number of RBs of the synchronization signal block, w ⁇ W min , and when w is an even number, the center RB of the common search space resource is the w/ of the RB corresponding to the transmission bandwidth of the common search space resource in the frequency domain. 2+1 RBs.
  • w can be configured or predefined, m and Can be predefined.
  • the center RB of the common search space resource is the w/2 RB in the RB corresponding to the transmission bandwidth of the common search space resource in the frequency domain
  • the center RB of the common search space resource The sequence number of the lowest RB of the sequence number and the synchronization signal block satisfies the following relationship:
  • sequence number of the lowest RB of the common search space resource The sequence number of the lowest RB with the sync signal block Meet the following relationship:
  • sequence number of the highest RB of the common search space resource The sequence number of the lowest RB with the sync signal block Meet the following relationship:
  • FIG. 3 is a schematic flow chart of a communication method according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • the UE reports the indication information to the network device, where the indication information is used to indicate the maximum bandwidth of the UE and/or whether the UE supports multiple configuration parameters for parallel transmission.
  • the UE may send the indication information through a preamble sequence or random access message 3 (Msg3).
  • Msg3 random access message 3
  • the network device receives the indication information.
  • the indication information is used to indicate the maximum bandwidth of the UE.
  • the indication information is used to indicate whether the UE supports multiple configuration parameters for parallel transmission.
  • the method shown in FIG. 3 may also include: 330 and 340, or 350 and 360.
  • the network device sends the first UE specific downlink control information and the common downlink control information by using the common search space resource in the first transmission time unit, and sends the second UE specific downlink control information by using the UE specific search space resource in the second transmission time unit.
  • the sending, by the network device, the first UE-specific downlink control information and the common downlink control information by using the common search space resource includes: the network device transmitting the common downlink control information and the first UE-specific information by using some or all of the common search space resources. Downstream control information.
  • the common search space resource includes 16 CCEs, where 8 CCEs are used to transmit common downlink control information, and 8 CCEs are used to send UE-specific downlink control information; or, 4 CCEs are used to send common downlink control information, 8
  • the CCEs are used to send the UE-specific downlink control information, or the eight CCEs are used to send the UE-specific downlink control information, or the four CCEs are used to send the common downlink control information.
  • the CCEs are used to send UE-specific downlink control information and the like.
  • the sending, by the network device, the second UE-specific downlink control information by using the UE-specific search space resource includes: the network device sending the second UE-specific downlink control information by using part or all of the UE-specific search space resources.
  • the UE detects the first UE specific downlink control information and the common downlink control information by using the common search space resource in the first transmission time unit, and detects the second UE specific downlink control information by using the UE specific search space resource in the second transmission time unit.
  • the network device sends the UE-specific downlink control information by using the UE-specific search space resource in the first transmission time unit, and sends only the common downlink control information by using the common search space resource in the second transmission time unit.
  • the network device sends the UE-specific downlink control information by using the UE-specific search space resource, and the network device sends the UE-specific downlink control information by using some or all of the resources in the UE-specific search space resource.
  • the transmitting, by the network device, the common downlink control information by using the common search space resource includes: the network device sending the public downlink control information by using some or all of the resources in the common search space resource.
  • the UE detects UE specific downlink control information by using the UE-specific search space resource in the first transmission time unit, and detects only the common downlink control information by using the common search space resource in the second transmission time unit.
  • the first transmission time unit is different from the second transmission time unit, and the time sequence of the first transmission time unit and the second transmission time unit is not limited.
  • the network device can simultaneously transmit the UE-specific downlink control information and the common downlink control information by using the UE-specific search space resource and the common search space resource, and accordingly, the UE can simultaneously monitor the common search space and the UE-specific search space resource.
  • the UE in the embodiment of the present invention can blindly check the public downlink control information and the UE specific downlink control information in different manners according to its own capabilities.
  • the UE not detecting the common search space resource and the UE specific search space resource at the same time includes:
  • the UE detects the first UE specific downlink control information and the common downlink control information by using the common search space resource in the first transmission time unit, and detects the second UE specific downlink control information by using the UE specific search space resource in the second transmission time unit;
  • the UE detects UE-specific downlink control information using the UE-specific search space resource in the first transmission time unit, and detects only the common downlink control information in the second transmission time unit using the common search space resource.
  • the first UE-specific downlink control information and the second UE-specific downlink control information may be the same or different, and are not limited in this embodiment of the present invention.
  • the UE simultaneously monitoring the common search space resource and the UE specific search space resource includes:
  • the UE detects the UE-specific downlink control information and the common downlink control information by using the common search space resource, and simultaneously detects the UE-specific downlink control information by using the UE-specific search space resource.
  • the UE-specific search space resource and the common search space resource may share a partial frequency band in the frequency domain, as shown in FIG. 2 .
  • the configuration parameters corresponding to the UE-specific search space resource and the common search space resource are the same.
  • the UE-specific search space resource and the common search space resource may also be orthogonal in the frequency domain, that is, the UE-specific search space resource and the common search space resource do not overlap each other in the frequency domain, as shown in FIG. 4 .
  • the configuration parameters corresponding to the UE-specific search space resource and the common search space resource may be the same or different.
  • FIG. 5 is a schematic flow chart of a communication method 500 in accordance with an embodiment of the present invention. As shown in FIG. 5, the method 500 includes the following.
  • the UE sends the indication information to the network device, where the indication information is used to indicate the maximum bandwidth of the UE or whether the UE supports multiple configuration parameters for parallel transmission.
  • the UE may send the indication information through a preamble sequence or random access message 3 (Msg3).
  • Msg3 random access message 3
  • the network device receives the indication information.
  • the indication information is used to indicate the maximum bandwidth of the UE.
  • the indication information is used to indicate whether the UE supports multiple configuration parameters for parallel transmission.
  • the network device may send the first public downlink control information and the second public downlink control information in different manners according to the capability of the UE.
  • the method 500 may further include: 520 and 530 after 520 if the first predetermined condition is met.
  • the first preset condition may include: the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is greater than the maximum bandwidth of the UE; or the first common search space resource and the second common search space resource The bandwidth in the frequency domain is less than or equal to the maximum bandwidth of the UE, and the configuration parameters corresponding to the first common search space resource and the second common search space resource are different, and the UE does not support parallel transmission of multiple configuration parameters.
  • the network device sends the first public downlink control information and the second public downlink control information by using the first common search space resource on the transmission time unit of the system message transmitted in the RAR time window, and does not transmit the system message in the RAR time window.
  • the second common downlink control information is transmitted on the transmission time unit using the second common search resource.
  • the sending, by the network device, the first public downlink control information and the second public downlink control information by using the first common search space resource includes: the network device sending the first public downlink by using some or all resources in the first common search space resource.
  • the sending, by the network device, the second public downlink control information by using the second common search resource includes: the network device sending the second public downlink control information by using part or all of the second common search resource.
  • the UE detects the first public downlink control information and the second public downlink control information by using the first common search space resource on the transmission time unit of the system message transmitted in the RAR time window, and does not transmit the system message transmission in the RAR time window.
  • the second common downlink control information is detected on the time unit using the second common search resource.
  • the method 500 may further include: 550 and 560 after 520 if the second predetermined condition is met.
  • the second preset condition may include: the bandwidth of the first common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, and the bandwidth of the second common search space resource in the frequency domain is greater than the maximum bandwidth of the UE; or The bandwidth of the common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE, the configuration parameters corresponding to the second common search space resource are different, and the UE does not support the second common search space resource. Configuration parameters.
  • the network device sends the first public downlink control information and the second public downlink control information by using only the first common search space resource.
  • the UE detects the first public downlink control information and the second public downlink control information by using only the first common search space resource.
  • the method 500 may further include: 570 and 580 after 520 if the third predetermined condition is met.
  • the third preset condition may include that the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.
  • the network device sends the first public downlink control information by using the first common search space resource, and sends the second public downlink control information by using the second common search space resource.
  • the UE detects the first public downlink control information by using the first common search space resource, and detects the second public downlink control information by using the second common search space resource.
  • the embodiment of the present invention is applicable to a scenario in which a large bandwidth or multiple configuration parameters are transmitted in parallel, and can support different capabilities of the UE to blindly check the public downlink control information.
  • the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain refers to: the bandwidth of the first common search space resource in the frequency domain, and the second common search space resource in the frequency domain.
  • the bandwidth and the interval bandwidth of the first common search space resource and the second common search space resource in the frequency domain refers to: the bandwidth of the first common search space resource in the frequency domain, and the second common search space resource in the frequency domain.
  • the total bandwidth of the first common search space resource and the second common search space resource in the frequency domain refers to: the RB between the highest RB of the first common search space resource and the lowest RB of the second common search space resource The number, or the number of RBs between the highest RB of the second common search space resource and the lowest RB of the first common search space resource.
  • the first common search space resource is used to transmit first common downlink control information and/or second common downlink control information
  • the second common search space resource is used to transmit second common downlink control information.
  • the first common downlink control information includes downlink control information for scheduling system messages
  • the second common downlink control information includes downlink control information for scheduling UE RARs.
  • the first common search space resource may be configured through the MIB or implicitly indicated by the initial access information.
  • the initial access information may be a time-frequency resource of a Synchronization Signal (SS) block, and the synchronization signal block may include a primary synchronization signal (Primary SS) and/or a secondary synchronization signal (Secondary SS), and may also include an MIB.
  • SS Synchronization Signal
  • Primary SS primary synchronization signal
  • Secondary SS secondary synchronization signal
  • one or more candidate resources of the first common search space resource may be implicitly indicated by initial access information (such as a time-frequency resource of the synchronization signal block), and then the one or more candidate resources are indicated by the MIB.
  • initial access information such as a time-frequency resource of the synchronization signal block
  • the one or more candidate resources are indicated by the MIB.
  • One of the candidate resources is used as the first common search space resource.
  • the configuration parameter corresponding to the first common search space resource may be predefined or indicated by the MIB.
  • the second common search space resource may be configured by a system message.
  • one or more candidate resources of the second common search space resource may also be implicitly indicated by initial access information (such as a time-frequency resource of the synchronization signal block), and then the one or more candidates are indicated by a system message.
  • One candidate resource in the resource is used as the second common search space resource.
  • the configuration parameter corresponding to the second common search space resource may be the same as the configuration parameter corresponding to the first common search space by default.
  • configuration parameters corresponding to the second common space search resource may be configured by system messages.
  • the configuration parameters corresponding to the second common search space resource and the first common search space resource may be different.
  • the first common search space resource corresponds to the first configuration parameter
  • the second common search space corresponds to the second configuration parameter.
  • the first common search space resource includes a synchronization signal block
  • the sequence number of the center RB of the first common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • the number of RBs, m is the number of RBs of the sync signal block, w 1 ⁇ W min , and when w is even, the center RB of the first common search space resource is the transmission bandwidth of the first common search space resource in the frequency domain
  • w 1 can be configured or predefined, m and Can be predefined.
  • the center RB of the first common search space resource is the w 1 /2 RB in the RB corresponding to the transmission bandwidth of the first common search space resource in the frequency domain
  • the first The sequence number of the center RB of the common search space resource and the sequence number of the lowest RB of the synchronization signal block satisfy the following relationship:
  • sequence number of the lowest RB of the first common search space resource The sequence number of the lowest RB with the sync signal block Meet the following relationship:
  • sequence number of the highest RB of the first common search space resource The sequence number of the lowest RB with the sync signal block Meet the following relationship:
  • the UE can simultaneously monitor the first common search space resource and the synchronization signal block.
  • the second common search space resource may or may not include a sync signal block.
  • the second common search space resource does not include a synchronization signal block, and the lowest RB, the center RB or the highest RB of the second common search space resource may be any one of the system downlink bandwidth, and the second common search space resource is The subband occupied in the frequency domain is less than or equal to the minimum value Wmin of the maximum bandwidths of the plurality of UEs of the cell.
  • the sequence number of the lowest RB of the second common search space resource satisfies the following relationship:
  • sequence number of the center RB of the second common search space resource satisfies the following relationship:
  • sequence number of the highest RB of the second common search space resource satisfies the following relationship:
  • the sequence number of the lowest RB of the second common search space resource The serial number of the center RB of the second common search space resource, a sequence number of the highest RB of the second common search space resource, where w 2 is the number of RBs of the subband occupied by the second common search space resource in the frequency domain,
  • the number of RBs in the downlink bandwidth may be the bandwidth of the system or the bandwidth of a section of the bandwidth.
  • the first common search space resource and the second common search space resource share a partial frequency band in the frequency domain, as shown in FIG.
  • the configuration parameter corresponding to the second common search space resource is the same as the configuration parameter corresponding to the first common search space resource.
  • the first common search space resource and the second common search space are orthogonal in the frequency domain, that is, the first common search space resource and the second common search space do not overlap each other in the frequency domain, as shown in FIG. 7 .
  • the configuration parameters corresponding to the second common search space resource and the configuration parameters corresponding to the first common search space resource may be the same or different.
  • the second common search space resource does not include a synchronization signal block
  • the lowest RB, the center RB, or the highest RB of the second common search space resource may be any one of the system downlink bandwidths.
  • the bit overhead Y of the second common downlink control information satisfies the following relationship:
  • L max is the maximum number of RBs of the subband occupied by the second common search space resource in the frequency domain, The number of RBs corresponding to the downlink bandwidth of the system.
  • the bit overhead of the second common downlink control information is determined according to the foregoing relationship, which is beneficial to reducing the number of bits of the downlink control information, thereby reducing control overhead.
  • the SI messages of different periods are sent by Time Diversity Multiplexing (TDM), so that the SI message needs to be reserved in the frequency division multiplexing.
  • TDM Time Diversity Multiplexing
  • the protection band needs to be reserved when frequency division multiplexing with data using different configuration parameters, so that more protection bands need to be reserved, which causes waste of frequency domain resources. Therefore, another embodiment of the present invention provides a communication method, which is configured to transmit multiple SI messages with different periods on the same transmission time unit, and transmit the multiple SI messages in an FDM manner, thereby reducing different periods.
  • a guard band needs to be reserved, thereby helping to avoid waste of frequency domain resources.
  • FIG. 8 is a schematic flowchart of a communication method according to an embodiment of the present invention. As shown in FIG. 8, the method includes: 810: A network device sends n system information (SI) messages on a same transmission time unit, where frequency domain resources of n SI messages are different, and sending periods of n SI messages are different. , n is an integer greater than or equal to 2. 820. The UE receives the n SI messages.
  • SI system information
  • n SI messages use the same configuration parameters.
  • This configuration parameter can be predefined or indicated by a system message.
  • the sub-bands of the SI windows of the n SI messages are FDM distributed within the system bandwidth.
  • only two guard bands need to be reserved at the outermost side of the n sub-bands of the n SI messages, without having to reserve two guard bands for each sub-band of the SI message. Helps avoid waste of frequency domain resources.
  • the initial transmission time units of the SI window corresponding to the n SI messages are the same.
  • SI-win represents the SI window. Since the periods of the SI windows corresponding to the n SI messages are different, the distribution of the SI windows of the n SI messages exhibits a nested structure as shown in FIG. In other words, a shorter period of SI window is included on the time slot in which the SI window having a longer period is located.
  • the frequency domain resources of the n SI messages may be predefined or configured by the network device.
  • the method may further include: 830, the network device sends a System Information Block (SIB1) message, and the frequency domain resources of the n SI messages are according to the n
  • SIB1 System Information Block
  • the UE receives the SIB1 message.
  • the UE may determine frequency domain resources of the n SI messages according to the indexes of the n SI messages in the SIB1 message.
  • the number of RBs corresponding to the frequency domain width of the SI message, the starting RB corresponding to the kth SI message is I RB +x, where I RB is the offset of the starting RB corresponding to the first SI message in the system bandwidth. value.
  • I RB is configured through broadcast signaling or higher layer signaling.
  • the ordering of the SI messages here is determined according to the index in the SIB1 message.
  • the time windows in which the n SI messages are each have the same starting transmission time unit.
  • the initial transmission time unit may be a start frame, a start time slot or a start microslot.
  • the starting frame refers to the system frame at the starting position.
  • the offset of the start transmission time unit of the time window in which the n SI messages are located and the start transmission time unit of SIB1 are predefined or configured by SIB1.
  • the value of the offset may be 0 or other values, which is not limited in this embodiment of the present invention.
  • SIB1 has the same initial transmission time unit as the n SI messages.
  • n f is the starting subframe of the time window in which the kth SI message is located
  • n s is the starting time slot of the time window in which the kth SI message is located
  • n is a predefined value
  • T k is the kth SI
  • ⁇ offset is the offset of the start time slot of the window in which the kth SI message is located with respect to the start time slot of SIB1.
  • k is an integer greater than or equal to 2 and less than or equal to n.
  • the ⁇ offset can be configured for pre-defined or higher layer signaling.
  • FIG. 11 is a schematic structural diagram of a network device 1100 according to an embodiment of the present invention.
  • the network device 1100 shown in FIG. 11 can be used to implement related processes of the network device in FIG. 1, FIG. 3, FIG. 5 or FIG.
  • the network device 1100 may include a processing unit 1110 and a transceiver unit 1120.
  • the processing unit 1110 can be used to implement the function of at least one of the following steps: 110 in the method shown in FIG.
  • the transceiver unit 1120 can be used to implement the functions of at least one of the following steps: 120 in the method shown in FIG. 1, 320, 330, and 350 in the method shown in FIG. 3, and 520, 530, 550, and 570 in the method shown in FIG. 810 and 830 are shown in the method.
  • a processing unit configured to determine, according to a maximum bandwidth of the user equipment UE and a common search space resource, a UE-specific search space resource;
  • a transceiver unit configured to send configuration information to the UE, where the configuration information is used to indicate the UE-specific search space resource determined by the processing unit.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.
  • sequence number of the lowest resource block RB of the common search space resource and the sequence number of the lowest RB of the UE specific search space resource satisfy the following relationship:
  • the sequence number of the lowest RB of the common search space resource a sequence number of the lowest RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the transmission of the UE-specific search space resource in the frequency domain
  • the number of RBs corresponding to the bandwidth where W is the number of RBs corresponding to the maximum bandwidth of the UE, and v ⁇ W.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum value among the maximum bandwidths of multiple UEs in the cell.
  • the transceiver unit is further configured to receive indication information reported by the UE, where the indication information is used to indicate a maximum bandwidth of the UE.
  • Transceiver unit for:
  • the total bandwidth of the user equipment UE-specific search space resource and the common search space resource in the frequency domain is greater than the maximum bandwidth of the UE, transmitting, by using the common search space resource, the first UE-specific downlink control information and the public in the first transmission time unit Downlink control information, in the second transmission time unit, using the UE-specific search space resource to send second UE-specific downlink control information;
  • the UE uses the UE-specific search space resource to send the UE-specific downlink control information in the first transmission time unit, where The second transmission time unit transmits only the common downlink control information by using the common search space resource;
  • the first transmission time unit uses the common search space resource to send the first UE-specific downlink control information and And transmitting, by the second transmission time unit, the second UE specific downlink control information by using the UE specific search space resource, where
  • the UE uses the UE-specific search space resource to send the UE-specific downlink control information in the first transmission time unit, where The second transmission time unit transmits only the common downlink control information by using the common search space resource;
  • the first transmission time unit is different from the second transmission time unit.
  • the transceiver unit is further configured to receive the indication information reported by the UE, where the indication information is used to indicate a maximum bandwidth of the UE and/or the UE does not support parallel transmission of multiple configuration parameters.
  • FIG. 12 is a schematic structural diagram of a network device 1200 according to another embodiment of the present invention.
  • network device 1200 includes a processor 1210, a transceiver 1220, and a memory 1230.
  • the processor 1210, transceiver 1220, and memory 1230 communicate with one another via internal connection paths to communicate control signals and/or data signals.
  • the memory 1230 is for storing instructions for executing the instructions stored by the memory 1230.
  • the transceiver 1220 is configured to transceive signals under the control of the processor 1210.
  • the transceiver 1220 is configured to implement the functions of the transceiving unit 1120 in the network device 1100 shown in FIG.
  • the processor 1210 is configured to implement the functions of the processing unit 1110 in the network device 1100 shown in FIG. 11 for brevity, and details are not described herein again.
  • FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment shown in FIG. 13 can be used to implement related processes of the user equipment in FIG. 1, FIG. 3, FIG. 5 or FIG.
  • the user equipment may include a processing unit 1310 and a transceiver unit 1320.
  • the processing unit 1310 can be used to implement 140 in the method shown in FIG. 1, 340 and 360 in the method shown in FIG. 3, and 540, 560 and 580 in the method shown in FIG.
  • the transceiver unit 1320 can be used to implement the functions of at least one of the following steps: 130 in the method shown in FIG. 1, 310 in the method shown in FIG. 3, 510 in the method shown in FIG. 5, and 820 and 840 in the method shown in FIG.
  • a transceiver unit configured to receive configuration information sent by the network device, where the configuration information is used to indicate a UE-specific search space resource configured for the UE, where the UE-specific search space resource is based on a maximum bandwidth and a common search of the UE Space resource determined;
  • a processing unit configured to detect, by using the UE-specific search space resource, the UE-specific downlink control information according to the configuration information received by the transceiver unit.
  • the total bandwidth of the UE-specific search space resource and the common search space resource in the frequency domain is less than or equal to the maximum bandwidth of the UE.
  • sequence number of the lowest resource block RB of the common search space resource and the sequence number of the lowest RB of the UE specific search space resource satisfy the following relationship:
  • the sequence number of the lowest RB of the common search space resource a sequence number of the lowest RB of the UE-specific search space resource, w is the number of RBs corresponding to the transmission bandwidth of the common search space resource in the frequency domain, and v is the transmission of the UE-specific search space resource in the frequency domain
  • the number of RBs corresponding to the bandwidth where W is the number of RBs corresponding to the maximum bandwidth of the UE, and v ⁇ W.
  • the bandwidth of the common search space resource in the frequency domain is less than or equal to a minimum value among the maximum bandwidths of multiple UEs in the cell.
  • the transceiver unit is further configured to send indication information to the network device, where the indication information is used to indicate a maximum bandwidth of the UE.
  • the processing unit is also used to:
  • the common search space resource and the UE-specific search space resource are not simultaneously monitored;
  • the common search space resource and the UE-specific search space resource are not simultaneously monitored.
  • the processing unit is specifically configured to:
  • the first transmission time unit is different from the second transmission time unit.
  • the transceiver unit is configured to report the indication information to the network device, where the indication information is used to indicate the maximum bandwidth of the UE and/or the UE does not support parallel transmission of multiple configuration parameters.
  • FIG. 14 is a schematic structural diagram of a terminal device 1400 according to another embodiment of the present invention.
  • terminal device 1400 includes a processor 1410, a transceiver 1420, and a memory 1430.
  • the processor 1410, transceiver 1420, and memory 1430 communicate with one another via internal connection paths to communicate control signals and/or data signals.
  • the memory 1430 is for storing instructions for executing the instructions stored by the memory 1430.
  • Transceiver 1420 is operative to transmit and receive signals under the control of processor 1410.
  • the transceiver 1420 is configured to implement the functions of the transceiver unit 1320 in the terminal device 1300 shown in FIG.
  • the processor 1410 is configured to implement the functions of the processing unit 1310 in the terminal device 1300 shown in FIG. 13 .
  • details are not described herein again.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the various embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

本申请提供了一种通信方法、网络设备和用户设备，该方法包括：网络设备向用户设备UE发送第一配置信息，所述第一配置信息用于指示UE特定搜索空间资源；所述网络设备向所述UE发送第二配置信息，所述第二配置信息用于指示公共搜索空间资源。本申请中，通过根据UE的最大带宽和公共搜索空间资源为UE配置UE特定搜索空间资源，使得UE能够同时监测公共搜索空间和UE特定搜索空间。

Description

通信方法、网络设备和用户设备
本申请要求于2017年04月28日提交中国专利局、申请号为201710299259.4、申请名称为“通信方法、网络设备和用户设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及通信方法、网络设备和用户设备。
背景技术
在长期演进(Long Term Evolution，LTE)中，公共搜索空间资源是预定义的，用户设备(User Equipment，UE)特定搜索空间资源是预定义的或者是基于网络侧配置的。由于LTE中小区内的最小UE带宽能力不小于系统带宽，即UE的工作带宽为系统带宽，此时所有UE都能够同时监测公共搜索空间和UE特定搜索空间。
在第5代网络(5th Generation，5G)新空口(New Radio，NR)中，系统带宽与LTE系统中的系统带宽不同，如果沿用现有方案预定义或配置UE特定搜索空间，则可能导致UE无法同时监测公共搜索空间和UE特定搜索空间。
发明内容
本申请提供一种通信方法、网络设备和用户设备，使得UE能够同时监测公共搜索空间和UE特定搜索空间。
第一方面，提供了一种通信方法，所述方法包括：
网络设备根据用户设备UE的最大带宽和公共搜索空间资源确定UE特定搜索空间资源；
所述网络设备向所述UE发送配置信息，所述配置信息用于指示所述UE特定搜索空间资源。
其中，公共搜索空间资源和UE特定搜索空间资源均指频域资源。
可选地，所述公共搜索空间资源对应的配置参数和所述UE特定搜索空间资源对应的配置参数相同。其中，配置参数可以包括子载波间隔大小、循环前缀长度、传输时间单元长度、符号长度和传输时间单元的符号数等参数中的至少一种。应理解，配置参数还可以称为系统参数集合或者其他名称，本发明实施例对此不做限定。
应注意，UE的最大带宽小于或等于UE能够支持的最大带宽。换句话说，这里的UE的最大带宽是UE或基站期望UE支持的最大带宽，UE能够支持的最大带宽是UE理论上能够提供的最大带宽(也称为UE最大带宽能力)。例如，UE能够支持的最大带宽等于射频传输带宽与基带处理带宽中的最小值，即UE最大带宽能力＝min(射频带宽能力，基带处理能力)，其中min()表示取()中的最小值。
通过根据UE的最大带宽和公共搜索空间资源为UE配置UE特定搜索空间资源，使得UE能够同时监测公共搜索空间和UE特定搜索空间。
UE采用所述公共搜索空间检测公共下行控制信息和/或UE特定下行控制信息，采用UE特定搜索空间检测UE特定下行控制信息。
所述公共下行控制信息是通过公共无线网络临时标识(Radio Network Temporary Identity，RNTI)加扰的下行控制信息。其中，所述公共RNTI为预定义或网络设备配置给小区全部UE或一组UE的公共参数，包括系统消息无线网络临时标识(System Information Radio Network Temporary Identifier，SI-RNTI)、寻呼无线网络临时标识(Paging Radio Network Temporary Identify，P-RNTI)、随机接入无线网络临时标识(Random Access Radio Network Temporary Identify，RA-RNTI)等。
所述UE特定下行控制信息是通过UE特定无线网络临时标识(Radio Network Tempory Identity，RNTI)加扰的下行控制信息。其中，所述UE特定RNTI为网络设备配置给小区中特定UE的参数，包括小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)、临时C-RNTI(Temporary C-RNTI)、半静态调度的C-RNTI(Semi-Persistent Scheduling C-RNTI，SPS C-RNTI)等。
可选地，所述公共搜索空间资源可以是通过主信息块(Master Information Block，MIB)配置的，或者是由初始接入信息隐式指示的。其中，初始接入信息可以是同步信号(Synchronization Signal，SS)块的时频资源，同步信号块可以包括主同步信号(Primary SS)和/或辅同步信号(Secondary SS)，还可以包括MIB。
可选地，还可以由初始接入信息(如同步信号块的时频资源)隐式地指示公共搜索空间资源的一个或多个候选资源，然后通过MIB指示该一个或多个候选资源中的一个候选资源作为所述公共搜索空间资源。
可选地，所述网络设备向所述UE发送配置信息，包括：
所述网络设备向所述UE发送无线资源控制(Radio Resource Control，RRC)信令，所述RRC信令包括所述配置信息。也就是说，网络设备可以通过RRC信令为UE配置UE特定搜索空间资源。
在一些可能的实现方式中，所述UE特定搜索空间资源和所述公共搜索空间资源在频域上的总带宽小于或等于所述UE的最大带宽。
应理解，所述UE特定搜索空间资源和所述公共搜索空间资源在频域上的总带宽指的是：所述UE特定搜索空间资源在频域上的带宽、所述公共搜索空间资源在频域上的带宽以及所述UE特定搜索空间资源与所述公共搜索空间资源在频域上的间隔带宽。
例如，所述UE特定搜索空间资源和所述公共搜索空间资源在频域上的总带宽指的是：所述UE特定搜索空间资源的最高资源块(Resource Block，RB)与所述公共搜索空间资源的最低RB之间的RB的数量，或所述公共搜索空间资源的最高RB与所述UE特定搜索空间资源的最低RB之间的RB的数量。
在一些可能的实现方式中，所述公共搜索空间资源的最低资源块RB的序号与所述UE特定搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000001
其中，
Figure PCTCN2018085000-appb-000002
为所述公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000003
为所述UE特定搜索 空间资源的最低RB的序号，w为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，v为所述UE特定搜索空间资源在频域上的传输带宽对应的RB的数量，W为所述UE的最大带宽对应的RB的数量，v≤W。
在一些可能的实现方式中，所述UE特定搜索空间资源的中心RB的序号与所述公共搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000004
其中，
Figure PCTCN2018085000-appb-000005
为所述公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000006
为所述UE特定搜索空间资源的中心RB的序号，w为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，v为所述UE特定搜索空间资源在频域上的传输带宽的RB的数量，W为所述UE的最大带宽对应的RB的数量，v≤W，并且当v为偶数时，所述UE特定搜索空间资源的中心RB为所述UE特定搜索空间资源在频域上的传输带宽对应的RB中的第v/2+1个RB。
w、v可以是配置的或者预定义的，
Figure PCTCN2018085000-appb-000007
可以是预定义的或通过MIB配置的。
可选地，如果v为偶数，且所述UE特定搜索空间资源的中心RB为在频域上的传输带宽对应的RB中的第v/2个RB，则所述公共搜索空间资源的最低RB的序号与所述UE特定搜索空间资源的中心RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000008
可选地，所述UE特定搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000009
与所述公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000010
满足如下关系式：
Figure PCTCN2018085000-appb-000011
可选地，所述UE特定搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000012
与所述公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000013
满足如下关系式：
Figure PCTCN2018085000-appb-000014
关系式(2)、(3)和(4)中的相关参数可以参考关系式(1)的相关描述，在此不再赘述。
在一些可能的实现方式中，所述公共搜索空间资源为所述UE特定搜索空间资源的子集。这样配置能保证不同最大带宽的UE都能够同时监测公共搜索空间和UE特定搜索空间。
在一些可能的实现方式中，所述公共搜索空间资源在频域上的带宽小于或等于小区内的多个UE的最大带宽中的最小值。例如，所述公共搜索空间资源在频域上的带宽小于或等于小区内全部UE或一组UE的最大带宽中的最小值。这样能够保证小区内的这些UE都能够监测公共搜索空间资源。
在一些可能的实现方式中，在所述网络设备根据用户设备UE的最大带宽和公共搜索空间资源确定为所述UE配置的UE特定搜索空间资源之前，所述方法还包括：
所述网络设备接收所述UE上报的指示信息，所述指示信息用于指示所述UE的最大带宽。
在一些可能的实现方式中，所述公共搜索空间资源包括同步信号块，所述公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000015
其中，
Figure PCTCN2018085000-appb-000016
为所述同步信号块的最低RB的序号，
Figure PCTCN2018085000-appb-000017
为所述公共搜索空间资源的中心RB的序号，W min为小区内多个UE的最大带宽中的最小值对应的RB的数量，w为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，m为所述同步信号块的RB的数量，w≤W min，并且当w为偶数时，所述公共搜索空间资源的中心RB为所述公共搜索空间资源在频域上的传输带宽对应的RB中的第w/2+1个RB。w可以是配置的或者预定义的，m和
Figure PCTCN2018085000-appb-000018
可以是预定义的。
这样，能够保证UE可以同时监测公共搜索空间和同步信号块。
可选地，如果w为偶数，且所述公共搜索空间资源的中心RB为所述公共搜索空间资源在频域上的传输带宽对应的RB中的第w/2个RB，则所述公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000019
可选地，所述公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000020
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000021
满足如下关系式：
Figure PCTCN2018085000-appb-000022
可选地，所述公共搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000023
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000024
满足如下关系式：
Figure PCTCN2018085000-appb-000025
关系式(6)、(7)和(8)中的相关参数可以参考关系式(5)的相关描述，在此不再赘述。
第二方面，提供了一种通信方法，所述方法包括：
用户设备UE接收网络设备发送的配置信息，所述配置信息用于指示为所述UE配置的UE特定搜索空间资源，所述UE特定搜索空间资源是根据所述UE的最大带宽和公共搜索空间资源确定的；
所述UE根据所述配置信息采用所述UE特定搜索空间资源检测UE特定下行控制信息。
UE根据网络侧配置的UE特定搜索空间资源能够同时监测公共搜索空间和UE特定搜索空间。
可选地，所述公共搜索空间资源对应的配置参数和所述UE特定搜索空间资源对应的配置参数相同。其中，配置参数可以包括子载波间隔大小、循环前缀长度、传输时间单元长度、符号长度和传输时间单元的符号数等参数中的至少一种。应理解，配置参数还可以称为系统参数集合或者其他名称，本发明实施例对此不做限定。
其中，所述传输时间单元可以为时隙、时隙聚合、微时隙或微时隙聚合等时间单元，本发明实施例对此并不限定。
在一些可能的实现方式中，所述UE特定搜索空间资源和所述公共搜索空间资源在频域上的总带宽小于或等于所述UE的最大带宽。
在一些可能的实现方式中，所述公共搜索空间资源的最低资源块RB的序号与所述UE特定搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000026
其中，
Figure PCTCN2018085000-appb-000027
为所述公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000028
为所述UE特定搜索空间资源的最低RB的序号，w为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，v为所述UE特定搜索空间资源在频域上的传输带宽对应的RB的数量，W为所述UE的最大带宽对应的RB的数量，v≤W。
在一些可能的实现方式中，所述UE特定搜索空间资源的中心RB的序号与所述公共搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000029
其中，
Figure PCTCN2018085000-appb-000030
为所述公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000031
为所述UE特定搜索空间资源的中心RB的序号，w为所述公共搜索空间资源在频域上传输带宽对应的RB的数量，v为所述UE特定搜索空间资源在频域上传输带宽对应的RB的数量，W为所述UE的最大带宽对应的RB的数量，v≤W，并且当v为偶数时，所述UE特定搜索空间资源的中心RB为所述UE特定搜索空间资源在频域上的传输带宽对应的RB中的第v/2+1个RB。
w、v可以是配置的或者预定义的，
Figure PCTCN2018085000-appb-000032
可以是预定义的或通过MIB配置的。
可选地，如果v为偶数，且所述UE特定搜索空间资源的中心RB为所述UE特定搜索空间资源在频域上的传输带宽对应的RB中的第v/2个RB，则所述公共搜索空间资源的最低RB的序号与所述UE特定搜索空间资源的中心RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000033
可选地，所述公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000034
与所述UE特定搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000035
满足如下关系式：
Figure PCTCN2018085000-appb-000036
可选地，所述公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000037
与所述UE特定搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000038
满足如下关系式：
Figure PCTCN2018085000-appb-000039
关系式(2)、(3)和(4)中的相关参数可以参考关系式(1)的相关描述，在此不再赘述。
在一些可能的实现方式中，所述公共搜索空间资源为所述UE特定搜索空间资源的子集。这样配置能保证不同最大带宽的UE都能够同时监测公共搜索空间和UE特定搜索空间。
在一些可能的实现方式中，所述公共搜索空间资源在频域上的带宽小于或等于小区内的多个UE的最大带宽中的最小值。例如，所述公共搜索空间资源在频域上的带宽小于或等于小区内全部UE或一组UE的最大带宽中的最小值。这样能够保证小区内的这些所有UE都能够监测公共搜索空间资源。
在一些可能的实现方式中，所述方法还包括：
所述UE向所述网络设备发送指示信息，所述指示信息用于指示所述UE的最大带宽。
在一些可能的实现方式中，所述公共搜索空间资源包括同步信号块，所述公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000040
其中，
Figure PCTCN2018085000-appb-000041
为所述同步信号块的最低RB的序号，
Figure PCTCN2018085000-appb-000042
为所述公共搜索空间资源的中心RB的序号，W min为小区内多个UE的最大带宽中的最小值对应的RB的数量，w为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，m为所述同步信号块的RB的数量，w≤W min，并且当w为偶数时，所述公共搜索空间资源的中心RB为所述公共搜索空间资源在频域上的传输带宽对应的RB中的第w/2+1个RB。w可以是配置的或者预定义的，m和
Figure PCTCN2018085000-appb-000043
可以是预定义的。
可选地，如果w为偶数，且所述公共搜索空间资源的中心RB为所述公共搜索空间资源在频域上的传输带宽对应的RB中的第w/2个RB，则所述公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000044
可选地，所述公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000045
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000046
满足如下关系式：
Figure PCTCN2018085000-appb-000047
可选地，所述公共搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000048
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000049
满足如下关系式：
Figure PCTCN2018085000-appb-000050
关系式(6)、(7)和(8)中的相关参数可以参考关系式(5)的相关描述，在此不再赘述。
第三方面，提供了一种通信方法，所述方法包括：
若用户设备UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则所述UE不同时监测所述公共搜索空间资源和所述UE特定搜索空间资源；或者，
若UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输，则所述UE不同时监测所述公共搜索空间资源和所述UE特定搜索空间资源。
本发明实施例适用于大带宽或多配置参数并行传输的场景，能够支持不同能力的UE盲检公共下行控制信息和UE特定下行控制信息，有助于减少不同能力的UE盲检的次数。
所述公共下行控制信息是通过公共无线网络临时标识(Radio Network Temporary Identity，RNTI)加扰的下行控制信息。其中，所述公共RNTI包括系统消息无线网络临时标识(System Information Radio Network Temporary Identifier，SI-RNTI)、寻呼无线网络临时标识(Paging Radio Network Temporary Identify，P-RNTI)、随机接入无线网络临时标识(Random Access Radio Network Temporary Identify，RA-RNTI)等。
所述UE特定下行控制信息是通过UE特定无线网络临时标识(Radio Network Temporary Identity，RNTI)加扰的下行控制信息。其中，所述UE特定RNTI包括小区无线网络临时标识(Cell Radio Network Temporary Identifier，C-RNTI)、临时C-RNTI(Temporary C-RNTI)、半静态调度的C-RNTI(Semi-Persistent Scheduling C-RNTI，SPS C-RNTI)等。
可选地，所述公共搜索空间资源可以是通过主信息块(Master Information Block，MIB)配置的，或者是由初始接入信息隐式指示的。其中，初始接入信息可以是同步信号(Synchronization Signal，SS)块的时频资源，同步信号块可以包括主同步信号(Primary SS)和/或辅同步信号(Secondary SS)，还可以包括MIB。
可选地，还可以由初始接入信息(如同步信号块的时频资源)隐式地指示公共搜索空间资源的一个或多个候选资源，然后通过MIB指示该一个或多个候选资源中的一个候选资源作为所述公共搜索空间资源。
可选地，所述公共搜索空间资源对应的配置参数可以为预定义的或者通过MIB指示的。
由上所述第二配置信息可以是上述的主信息块或初始接入信息。
可选地，所述UE特定搜索空间资源可以是通过无线资源控制(Radio Resource Control，RRC)信令配置的，所述UE特定搜索空间资源对应的配置参数也可以是通过RRC信令配置的。
其中，配置参数可以包括子载波间隔大小、循环前缀长度、传输时间单元长度、符号长度和传输时间单元的符号数等参数中的至少一种。应理解，配置参数还可以称为系统参数集合或者其他名称，本发明实施例对此不做限定。
所述传输时间单元可以为时隙、时隙聚合、微时隙或微时隙聚合等时间单元，本发明实施例对此并不限定。
由上所述第一配置信息可以是上述的RRC信令或其他可以用于配置所述UE特定搜索空间资源的信令。
在一些可能的实现方式中，所述UE不同时监测所述公共搜索空间资源和所述UE特定搜索空间资源，包括：
所述UE在第一传输时间单元使用所述公共搜索空间资源检测第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源检测第二UE特定下行控制信息；
或者，
所述UE在传输时间单元使用所述UE特定搜索空间资源检测所述UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源仅检测所述公共下行控制信息；
其中，所述第一传输时间单元与所述第二传输时间单元不同。
本发明实施例对第一传输时间单元与第二传输时间单元的时间顺序不做限定。
所述第一UE特定下行控制信息和所述第二UE特定下行控制信息可以相同也可以不同，本发明实施例对此也不做限定。
在一些可能的实现方式中，所述方法还包括：
所述UE向网络设备上报指示信息，所述指示信息用于指示所述UE的最大带宽和/或所述UE是否支持多配置参数并行传输。
例如，所述UE可以通过前导序列或随机接入消息3(Msg3)发送所述指示信息。
第四方面，提供了一种通信方法，所述方法包括：
若用户设备UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则网络设备在第一传输时间单元使用所述公共搜索空间资源发送第一UE特定 下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源发送第二公共下行控制信息，或者，网络设备在第一传输时间单元使用所述UE特定搜索空间资源发送UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源发送公共下行控制信息，所述第一传输时间单元与所述第二传输时间单元不同；
或者，
若UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输，则网络设备在第一传输时间单元使用所述公共搜索空间资源发送第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源发送第二公共下行控制信息，或者，网络设备在第一传输时间单元使用所述UE特定搜索空间资源发送UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源发送公共下行控制信息；
其中，所述第一传输时间单元与所述第二传输时间单元不同。
所述第一UE特定下行控制信息和所述第二UE特定下行控制信息可以相同也可以不同，本发明实施例对此不做限定。
在一些可能的实现方式中，所述方法还包括：
所述网络设备接收所述UE上报的指示信息，所述指示信息用于指示所述UE的最大带宽和/或所述UE是否支持多配置参数并行传输。
第五方面，提供了一种通信方法，所述方法包括：
若第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则所述UE在随机接入响应(Random Access Response，RAR)时间窗内传输系统消息的传输时间单元上使用所述第一公共搜索空间资源检测第一公共下行控制信息和第二公共下行控制信息，并在所述RAR时间窗内不传输系统消息的传输时间单元上使用所述第二公共搜索资源检测所述第二公共下行控制信息；或者，
若第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽小于或等于UE的最大带宽，所述第一公共搜索空间资源和所述第二公共搜索空间资源对应的配置参数不同，且所述UE不支持多配置参数并行传输，则所述UE在RAR时间窗内传输系统消息的传输时间单元上使用所述第一公共搜索空间资源检测所述第一公共下行控制信息和所述第二公共下行控制信息，并在所述RAR时间窗内不传输系统消息的传输时间单元上使用所述第二公共搜索空间资源检测所述第二公共下行控制信息；或者，
若第一公共搜索空间资源在频域上的带宽小于或等于UE的最大带宽，第二公共搜索空间资源在频域上的带宽大于UE的最大带宽，或者所述第一公共搜索空间资源与第二公共搜索空间资源对应的配置参数不同且所述UE不支持所述第二公共搜索空间资源对应的配置参数，则所述UE仅使用所述第一公共搜索空间资源检测所述第一公共下行控制信息和所述第二公共下行控制信息；或者，
其他情况下，所述UE使用所述第一公共搜索空间资源检测第一公共下行控制信息，并使用所述第二公共搜索空间资源检测第二公共下行控制信息。
所述其他情况包括：第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽小于或等于UE的最大带宽。
其中，所述第一公共下行控制信息包括用于调度系统消息的下行控制信息，所述第二 公共下行控制信息包括用于调度所述UE RAR的下行控制信息。
所述第一公共搜索空间资源用于传输第一公共下行控制信息和/或第二公共下行控制信息，所述第二公共搜索空间资源用于传输第二公共下行控制信息。
本发明实施例适用于大带宽或多配置参数并行传输的场景，能够支持不同能力的UE盲检公共下行控制信息。
可选地，所述第一公共搜索空间资源可以是通过MIB配置的，或者是由初始接入信息隐式指示的。其中，初始接入信息可以是同步信号(Synchronization Signal，SS)块的时频资源，同步信号块可以包括主同步信号(Primary SS)和/或辅同步信号(Secondary SS)，还可以包括MIB。
可选地，还可以由初始接入信息(如同步信号块的时频资源)隐式地指示第一公共搜索空间资源的一个或多个候选资源，然后通过MIB指示该一个或多个候选资源中的一个候选资源作为所述第一公共搜索空间资源。
可选地，所述第一公共搜索空间资源对应的配置参数可以为预定义的或者通过MIB指示的。
可选地，所述第二公共搜索空间资源可以是通过系统消息配置的。可选地，还可以由初始接入信息(如同步信号块的时频资源)隐式地指示第二公共搜索空间资源的一个或多个候选资源，然后通过系统消息指示该一个或多个候选资源中的一个候选资源作为所述第二公共搜索空间资源。
在一些可能的实现方式中，所述第二公共搜索空间资源对应的配置参数可以默认与第一公共搜索空间对应的配置参数相同。
在一些可能的实现方式中，可以通过系统消息配置第二公共空间搜索资源对应的配置参数。可选地，第二公共搜索空间资源和第一公共搜索空间资源对应的配置参数可以不同。例如，第一公共搜索空间资源对应第一配置参数，第二公共搜索空间对应第二配置参数。
其中，配置参数可以包括子载波间隔大小、循环前缀长度、传输时间单元长度、符号长度和传输时间单元的符号数等参数中的至少一种。应理解，配置参数还可以称为系统参数集合或者其他名称，本发明实施例对此不做限定。
应理解，所述第一公共搜索空间资源包括同步信号块，所述第一公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000051
其中，
Figure PCTCN2018085000-appb-000052
为所述同步信号块的最低RB的序号，
Figure PCTCN2018085000-appb-000053
为所述第一公共搜索空间资源的中心RB的序号，W min为小区内多个UE的最大带宽中的最小值对应的RB的数量，w 1为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，m为所述同步信号块的RB的数量，w 1≤W min，并且当w为偶数时，所述第一公共搜索空间资源的中心RB为所述第一公共搜索空间资源在频域上的传输带宽对应的RB中的第w 1/2+1个RB。
w 1可以是配置的或者预定义的，m和
Figure PCTCN2018085000-appb-000054
可以是预定义。
可选地，如果w 1为偶数，且所述第一公共搜索空间资源的中心RB为所述第一公共搜索空间资源在频域上的传输带宽对应的RB中的第w 1/2个RB，则所述第一公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000055
可选地，所述第一公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000056
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000057
满足如下关系式：
Figure PCTCN2018085000-appb-000058
可选地，所述第一公共搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000059
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000060
满足如下关系式：
Figure PCTCN2018085000-appb-000061
关系式(10)、(11)和(12)中的相关参数可以参考关系式(9)的相关描述，在此不再赘述。
所述第二公共搜索空间资源可以包括同步信号块，也可以不包括同步信号块。
在一些可能的实现方式中，所述第二公共搜索空间资源不包括同步信号块，所述第二公共搜索空间资源的最低RB、中心RB或最高RB可以是系统下行带宽中任意一个RB，所述第二公共搜索空间资源在频域上占用的子带小于或等于小区的多个UE的最大带宽中的最小值W min。
所述第二公共搜索空间资源的最低RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000062
或者，所述第二公共搜索空间资源的中心RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000063
或者，所述第二公共搜索空间资源的最高RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000064
其中，
Figure PCTCN2018085000-appb-000065
为所述第二公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000066
为所述第二公共搜索空间资源的中心RB的序号，
Figure PCTCN2018085000-appb-000067
为所述第二公共搜索空间资源的最高RB的序号，w 2为所述第二公共搜索空间资源在频域上占用的子带的RB的数量，
Figure PCTCN2018085000-appb-000068
为下行带宽的RB的数量，所述下行带宽可以是系统的带宽，也可以是一段频带的带宽。
在一些可能的实现方式中，所述第一公共搜索空间资源和所述第二公共搜索空间资源在频域上共享部分频带。
在一些可能的实现方式中，所述第一公共搜索空间资源和所述第二公共搜索空间在频域上正交。
在一些可能的实现方式中，所述第二公共搜索空间资源不包括同步信号块，所述第二公共搜索空间资源的最低RB、中心RB或最高RB可以是系统下行带宽中任意一个RB。可选地，所述第二公共下行控制信息的比特开销Y满足如下关系式：
若
Figure PCTCN2018085000-appb-000069
则
Figure PCTCN2018085000-appb-000070
若
Figure PCTCN2018085000-appb-000071
则
Figure PCTCN2018085000-appb-000072
其中，L max为所述第二公共搜索空间资源在频域上占用的子带的RB的最大数量，
Figure PCTCN2018085000-appb-000073
为系统下行带宽对应的RB的数量。
第六方面，提供了一种通信方法，所述方法包括：
若第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则网络设备在随机接入响应RAR时间窗内传输系统消息的传输时间单元上使用所述第一公共搜索空间资源发送第一公共下行控制信息和第二公共下行控制信息，并在所述RAR时间窗内不传输系统消息的传输时间单元上使用所述第二公共搜索资源发送所述第二公共下行控制信息；或者，
若第一公共搜索空间资源和第二公共搜索空间资源在频域上的带宽小于或等于UE的最大带宽，所述第一公共搜索空间资源和所述第二公共搜索空间资源对应的配置参数不同，且所述UE不支持多配置参数并行传输，则网络设备在RAR时间窗内传输系统消息的传输时间单元上使用所述第一公共搜索空间资源发送第一公共下行控制信息和第二公共下行控制信息，并在所述RAR时间窗内不传输系统消息的传输时间单元上使用所述第二公共搜索空间资源发送所述第二公共下行控制信息；或者，
若第一公共搜索空间资源在频域上的带宽小于或等于UE的最大带宽，第二公共搜索空间资源在频域上的带宽大于UE的最大带宽，或所述第一公共搜索空间资源与第二公共搜索空间资源对应的配置参数不同且所述UE不支持所述第二公共搜索空间资源对应的配置参数，则网络设备仅使用所述第一公共搜索空间资源发送第一公共下行控制信息和第二公共下行控制信息；或者，
其他情况下，网络设备使用所述第一公共搜索空间资源发送第一公共下行控制信息，并使用所述第二公共搜索空间资源发送第二公共下行控制信息。
所述其他情况包括：第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽小于或等于UE的最大带宽。
其中，所述第一公共下行控制信息包括用于调度系统消息的下行控制信息，所述第二公共下行控制信息包括用于调度所述UE RAR的下行控制信息。
所述第一公共搜索空间资源用于传输第一公共下行控制信息和/或第二公共下行控制信息，所述第二公共搜索空间资源用于传输第二公共下行控制信息。
本发明实施例适用于大带宽或多配置参数并行传输的场景，能够支持不同能力的UE盲检公共下行控制信息。
可选地，所述网络设备可以通过MIB为UE配置所述第一公共搜索空间资源，或者所述网络设备还可以通过发送的初始接入信息隐式地指示所述第一公共搜索空间资源。其中，初始接入信息可以是同步信号(Synchronization Signal，SS)块的时频资源，同步信号块可以包括主同步信号(Primary SS)和/或辅同步信号(Secondary SS)，还可以包括MIB。
可选地，所述网络设备还可以通过初始接入信息(如同步信号块的时频资源)向UE隐式地指示第一公共搜索空间资源的一个或多个候选资源，然后通过发送的MIB向UE指示该一个或多个候选资源中的一个候选资源作为所述第一公共搜索空间资源。
可选地，所述网络设备可以通过MIB为UE配置所述第一公共搜索空间资源对应的配置参数。
可选地，所述网络设备可以通过系统消息为UE配置所述第二公共搜索空间资源，或者，所述网络设备还可以通过初始接入信息向UE隐式地指示所述第二公共搜索空间资源。
可选地，所述网络设备还可以通过发送的初始接入信息(如同步信号块的时频资源) 向UE隐式地指示第二公共搜索空间资源的一个或多个候选资源，然后通过发送的系统消息向UE指示该一个或多个候选资源中的一个候选资源作为所述第二公共搜索空间资源。
在一些可能的实现方式中，所述第二公共搜索空间资源对应的配置参数可以默认与第一公共搜索空间对应的配置参数相同。
在一些可能的实现方式中，网络设备可以通过系统消息为UE配置第二公共空间搜索资源对应的配置参数。可选地，第二公共搜索空间资源和第一公共搜索空间资源对应的配置参数可以不同。例如，第一公共搜索空间资源对应第一配置参数，第二公共搜索空间对应第二配置参数。
其中，配置参数可以包括子载波间隔大小、循环前缀长度、传输时间单元长度、符号长度和传输时间单元的符号数等参数中的至少一种。应理解，配置参数还可以称为系统参数集合或者其他名称，本发明实施例对此不做限定。
应理解，所述第一公共搜索空间资源包括同步信号块，所述第一公共搜索空间资源的中心PRB的序号与所述同步信号块的最低PRB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000074
其中，
Figure PCTCN2018085000-appb-000075
为所述同步信号块的最低RB的序号，
Figure PCTCN2018085000-appb-000076
为所述第一公共搜索空间资源的中心RB的序号，W min为小区内多个UE的最大带宽中的最小值对应的RB的数量，w 1为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，m为所述同步信号块的RB的数量，w 1≤W min，并且当w为偶数时，所述第一公共搜索空间资源的中心RB为所述第一公共搜索空间资源在频域上的传输带宽对应的RB中的第w 1/2+1个RB。
w 1可以是配置的或者预定义的，m和
Figure PCTCN2018085000-appb-000077
可以是预定义。
可选地，如果w 1为偶数，且所述第一公共搜索空间资源的中心RB为所述第一公共搜索空间资源在频域上的传输带宽对应的RB中的第w 1/2个RB，则所述第一公共搜索空间资源的中心RB的序号与所述同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000078
可选地，所述第一公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000079
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000080
满足如下关系式：
Figure PCTCN2018085000-appb-000081
可选地，所述公共搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000082
与所述同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000083
满足如下关系式：
Figure PCTCN2018085000-appb-000084
关系式(10)、(11)和(12)中的相关参数可以参考关系式(9)的相关描述，在此不再赘述。
所述第二公共搜索空间资源可以包括同步信号块，也可以不包括同步信号块。
在一些可能的实现方式中，所述第二公共搜索空间资源不包括同步信号块，所述第二公共搜索空间资源的最低RB、中心RB或最高RB可以是系统下行带宽中任意一个RB，所述第二公共搜索空间资源在频域上占用的子带小于或等于小区的多个UE的最大带宽中的最小值W min。
所述第二公共搜索空间资源的最低RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000085
或者，所述第二公共搜索空间资源的中心RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000086
或者，所述第二公共搜索空间资源的最高RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000087
其中，
Figure PCTCN2018085000-appb-000088
为所述第二公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000089
为所述第二公共搜索空间资源的中心RB的序号，
Figure PCTCN2018085000-appb-000090
为所述第二公共搜索空间资源的最高RB的序号，w 2为所述第二公共搜索空间资源在频域上占用的子带的RB的数量，
Figure PCTCN2018085000-appb-000091
为系统下行带宽的RB的数量。
在一些可能的实现方式中，所述第一公共搜索空间资源和所述第二公共搜索空间资源在频域上共享部分频带。
在一些可能的实现方式中，所述第一公共搜索空间资源和所述第二公共搜索空间在频域上正交。
在一些可能的实现方式中，所述第二公共搜索空间资源不包括同步信号块，所述第二公共搜索空间资源的起始RB、中心RB或最高RB可以是系统下行带宽中任意一个RB。可选地，所述第二公共下行控制信息的比特开销Y满足如下关系式：
若
Figure PCTCN2018085000-appb-000092
则
Figure PCTCN2018085000-appb-000093
若
Figure PCTCN2018085000-appb-000094
则
Figure PCTCN2018085000-appb-000095
其中，L max为所述第二公共搜索空间资源在频域上占用的子带的RB的最大数量，
Figure PCTCN2018085000-appb-000096
为系统下行带宽对应的RB的数量。
第七方面，提供了另一种通信方法，所述方法包括：
网络设备在同一传输时间单元上发送n个系统信息SI消息，所述n个SI消息占用的频域资源不同，所述n个消息的发送周期不同，n为大于或等于2的整数。
所述传输时间单元可以为时隙、时隙聚合、微时隙或微时隙聚合等时间单元，本发明实施例对此并不限定。
其中，n个SI消息使用相同的配置参数。该配置参数可以是预定义的或者通过系统消息指示的。
由于SI消息与使用不同配置参数的数据在频分复用时需要预留保护带，而现有技术中，不同周期的SI消息采用时分复用的方式发送，因此对于每种周期的SI消息来说，在与使用不同配置参数的数据频分复用时均需要预留保护带，这样需要预留较多的保护带，造成了频域资源的浪费。
本发明实施例中，通过在同一传输时间单元上发送多个周期不同的SI消息，并使该多个SI消息采用FDM的方式进行传输，有利于减少不同周期的SI消息与使用不同配置参数的数据通过FDM的方式并行传输时需要预留的保护带，从而有助于避免频域资源的浪费。
在一些可能的实现方式中，所述方法还包括：
所述网络设备发送系统信息块SIB1消息，所述n个SI消息的频域资源是根据所述n 个SI消息在所述SIB1消息中的索引确定的。
在一些可能的实现方式中，所述n个SI消息各自所在的时间窗口具有相同的起始传输时间单元。所述起始传输时间单元可以为起始帧、起始时隙或起始微时隙。所述起始帧指的是起始位置处的系统帧。
可选地，所述n个SI消息各自所在的时间窗口的起始传输时间单元与SIB1的起始传输时间单元的偏置是预定义的或通过SIB1配置的。例如，该偏置的取值可以为0，也可以为其他取值，本发明实施例对此不做限定。该偏置的取值为0时，SIB1与n个SI消息的具有相同的起始传输时间单元。
在一些可能的实现方式中，所述n个SI消息中第k个SI消息所在的时间窗口的起始帧和起始时隙满足以下关系式：
Figure PCTCN2018085000-appb-000097
其中，n f为所述第k个SI消息所在时间窗口的起始帧，n s为所述第k个SI消息所在时间窗口的起始时隙，n为预定义的值，T k为第k个SI消息所在时间窗口的周期，α offset指示了第k个SI消息所在窗口的起始时隙相对于SIB1的起始时隙的偏置，k为大于或等于2且小于或等于n的整数。
第八方面，提供了另一种通信方法，所述方法包括：
用户设备UE接收网络设备在同一传输时间单元发送的n个SI消息，所述n个SI消息的频域资源不同，所述n个SI消息的发送周期不同，n为大于或等于2的整数。
所述传输时间单元可以为时隙、时隙聚合、微时隙或微时隙聚合等时间单元，本发明实施例对此并不限定。
其中，n个SI消息使用相同的配置参数。该配置参数可以是预定义的或者通过系统消息指示的。
由于SI消息与使用不同配置参数的数据在频分复用时需要预留保护带，而现有技术中，不同周期的SI消息采用时分复用的方式发送，因此对于每种周期的SI消息来说，在与使用不同配置参数的数据频分复用时均需要预留保护带，这样需要预留较多的保护带，造成了频域资源的浪费。
本发明实施例中，通过在同一传输时间单元上发送多个周期不同的SI消息，并使该多个SI消息采用FDM的方式进行传输，有利于减少不同周期的SI消息与使用不同配置参数的数据通过FDM的方式并行传输时需要预留的保护带，从而有助于避免频域资源的浪费。
在一些可能的实现方式中，所述方法还包括：
所述用户设备接收所述网络设备发送的系统信息块SIB1消息，所述n个SI消息的频域资源是根据所述多个SI消息在所述SIB1消息中的索引确定的。
在一些可能的实现方式中，所述n个SI消息各自所在的时间窗口具有相同的起始传输时间单元。所述起始传输时间单元可以为起始帧、起始时隙或起始微时隙。所述起始帧指的是起始位置处的系统帧。
可选地，所述n个SI消息各自所在的时间窗口的起始传输时间单元与SIB1的起始传输时间单元的偏置是预定义的或通过SIB1配置的。例如，该偏置的取值可以为0，也可以为其他取值，本发明实施例对此不做限定。该偏置的取值为0时，SIB1与n个SI消息 的具有相同的起始传输时间单元。
在一些可能的实现方式中，所述n个SI消息中第k个SI消息所在的时间窗口的起始帧和起始时隙满足以下关系式：
Figure PCTCN2018085000-appb-000098
其中，n f为所述第k个SI消息所在时间窗口的起始帧，n s为所述第k个SI消息所在时间窗口的起始时隙，n为预定义的值，T k为第k个SI消息所在时间窗口的周期，α offset指示了第k个SI消息所在窗口的起始时隙相对于SIB1的起始时隙的偏置，k为大于或等于2且小于或等于n的整数。
第九方面，提供了一种网络设备，用于执行上述网络设备的方法，具体地，该网络设备可以包括用于执行上述网络设备相应步骤的模块。如，处理单元，发送单元和/或接收单元等。
第十方面，提供了一种用户设备，用于上述用户设备的方法，具体地，该用户设备可以包括用于执行上述用户设备相应步骤的模块。如，处理单元，发送单元以及接收单元等。
第十一方面，提供了一种网络设备，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得网络设备执行上述的网络设备的方法。
可选地，该网络设备还可以包括收发器，收发器用于在处理器的控制下收发信号。
第十二方面，提供了一种用户设备，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得终端设备执行上述的终端设备的方法。
可选地，该用户设备还可以包括收发器，收发器用于在处理器的控制下收发信号。
第十三方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十四方面，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各方面所述的方法。
附图说明
图1是根据本发明实施例的通信方法的示意性流程图；
图2是根据本发明实施例的公共搜索空间资源和UE特定搜索空间资源的示意图；
图3是根据本发明另一实施例的通信方法的示意性流程图；
图4是根据本发明另一实施例的公共搜索空间资源和UE特定搜索空间资源的示意图；
图5是根据本发明另一实施例的通信方法的示意性流程图；
图6是根据本发明另一实施例的第一公共搜索空间资源和第二公共搜索空间资源的示意图；
图7是根据本发明另一实施例的第一公共搜索空间资源和第二公共搜索空间资源的示意图；
图8是根据本发明另一实施例的通信方法的示意性流程图；
图9是根据本发明另一实施例的通信方法中的SI窗口的示意图；
图10是根据本发明另一实施例的通信方法中SI窗口的示意图；
图11是根据本发明实施例的网络设备的结构示意图；
图12是根据本发明另一实施例的网络设备的结构示意图；
图13是根据本发明实施例的用户设备的结构示意图；
图14是根据本发明另一实施例的用户设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
在不同的通信系统中，本发明实施例中的网络设备可以是不同的设备。例如，网络设备可以是基站、基站控制器(Base Station Controller，BSC)、无线网络控制器(Radio Network Controller，RNC)、LTE系统中的演进型基站(evolved Node B，eNB或e-NodeB)、WCDMA系统中的基站(NodeB)或者5G系统中的gNB等。
在本发明实施例中，用户设备(User Equipment，UE)也可称之为终端设备、移动台(Mobile Station，MS)、移动终端(Mobile Terminal)等，UE可以经无线接入网与一个或多个核心网进行通信，例如，UE可以是移动电话(或称为“蜂窝”电话)、具有通信功能的计算机等，UE还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
在本发明实施例中，配置参数可以包括子载波间隔大小、循环前缀长度、传输时间单元长度、符号长度和传输时间单元的符号数等参数中的至少一种。应理解，配置参数还可以称为系统参数集合或者其他名称，本发明实施例对此不做限定。
还应理解，传输时间单元可以为时隙、时隙聚合、微时隙或微时隙聚合等时间单元，本发明实施例对此并不限定。
本发明实施例提供了一种通信方法，通过根据UE的最大带宽和公共搜索空间资源确定UE特定搜索空间资源，并为UE配置该UE特定搜索空间资源，有助于UE同时监测公共搜索空间资源和UE特定搜索空间资源。
图1是根据本发明实施例的通信方法100的示意性流程图。如图1所示，方法100包括如下内容。
110、网络设备根据UE的最大带宽和公共搜索空间资源确定UE特定搜索空间资源。
120、网络设备向UE发送配置信息，配置信息用于指示UE特定搜索空间资源。
130、UE接收该配置信息。
140、UE根据接收到的配置信息采用UE特定搜索空间资源检测UE特定下行控制信息。
其中，公共搜索空间资源和UE特定搜索空间资源均指频域资源。
公共下行控制信息可以用于调度系统消息和随机接入响应，UE特定下行控制信息可以用于调度UE特定上下行数据传输的信息。
应注意，UE的最大带宽小于或等于UE能够支持的最大带宽。换句话说，这里的UE的最大带宽是UE或基站期望UE支持的最大带宽，UE能够支持的最大带宽是UE理论上能够提供的最大带宽(也称为UE最大带宽能力)。例如，UE能够支持的最大带宽等于射频传输带宽与基带处理带宽中的最小值，即UE最大带宽能力＝min(射频带宽能力，基 带处理能力)，其中min()表示取()中的最小值。
通过根据UE的最大带宽和公共搜索空间资源为UE配置UE特定搜索空间资源，使得UE能够同时监测公共搜索空间和UE特定搜索空间。
公共下行控制信息是通过RNTI加扰的下行控制信息。其中，公共RNTI为预定义或网络设备配置给小区全部UE或一组UE的公共参数，包括SI-RNTI、P-RNTI、RA-RNTI等。
UE特定下行控制信息是通过UE特定RNTI加扰的下行控制信息。其中，UE特定RNTI为网络设备配置给小区中特定UE的参数，包括C-RNTI、临时C-RNTI、SPS C-RNTI等。
可选地，公共搜索空间资源可以是通过MIB配置的，或者由初始接入信息隐式指示的。其中，初始接入信息可以是SS块的时频资源，同步信号块可以包括主同步信号(Primary SS)和/或辅同步信号(Secondary SS)，还可以包括MIB。
可选地，还可以由初始接入信息(如同步信号块的时频资源)公共搜索空间资源的一个或多个候选资源，然后通过MIB指示该一个或多个候选资源中的一个作为公共搜索空间资源。
公共搜索空间资源在频域上的带宽小于或等于小区内的多个UE的最大带宽中的最小值。例如，公共搜索空间资源在频域上的带宽小于或等于小区内全部UE或一组UE的最大带宽中的最小值。这样能够保证小区内的这些UE都能够监测公共搜索空间资源。
可选地，公共搜索空间资源对应的配置参数可以为预定义的或者通过MIB指示的。
可选地，在120中网络设备向UE发送配置信息包括：网络设备向UE发送RRC信令，RRC信令包括该配置信息。也就是说，网络设备可以通过RRC信令为UE配置UE特定搜索空间资源。相应地，在130中UE接收该RRC信令。UE在接收到该RRC信令之后可以从该RRC信令中获取该配置信息。
可选地，UE特定搜索空间资源对应的配置参数也可以是通过RRC信令配置的。
可选地，公共搜索空间资源对应的配置参数和UE特定搜索空间资源对应的配置参数相同。
在一些实施例中，UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽小于或等于UE的最大带宽。
应理解，UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽指的是：UE特定搜索空间资源在频域上的带宽、公共搜索空间资源在频域上的带宽以及UE特定搜索空间资源与公共搜索空间资源在频域上的间隔带宽。
例如，UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽指的是：UE特定搜索空间资源的最高资源块(Resource Block，RB)与公共搜索空间资源的最低RB之间的RB的数量，或公共搜索空间资源的最高RB与UE特定搜索空间资源的最低RB之间的RB的数量。
可选地，如图2所示，公共搜索空间资源和UE特定搜索空间资源在频域上共享部分频带，此时UE特定搜索空间资源对应的配置参数与公共搜索空间资源对应的配置参数相同。在一些实施例中，UE特定搜索空间资源的中心RB的序号与公共搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000099
其中，
Figure PCTCN2018085000-appb-000100
为公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000101
为UE特定搜索空间资源的中心RB的序号，w为公共搜索空间资源在频域上的传输带宽对应的RB的数量，v为UE特定搜索空间资源在频域上的传输带宽的RB的数量，W为UE的最大带宽对应的RB的数量，v≤W，并且当v为偶数时，UE特定搜索空间资源的中心RB为UE特定搜索空间资源在频域上的传输带宽对应的RB中的第v/2+1个RB。
w、v可以是配置的或者预定义的，
Figure PCTCN2018085000-appb-000102
可以是预定义的或通过MIB配置的。
可选地，如果v为偶数，且UE特定搜索空间资源的中心RB为在频域上的传输带宽对应的RB中的第v/2个RB，则公共搜索空间资源的最低RB的序号与UE特定搜索空间资源的中心RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000103
可选地，UE特定搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000104
与公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000105
满足如下关系式：
Figure PCTCN2018085000-appb-000106
可选地，UE特定搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000107
与公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000108
满足如下关系式：
Figure PCTCN2018085000-appb-000109
关系式(2)、(3)和(4)中的相关参数可以参考关系式(1)的相关描述，在此不再赘述。
还需要说明的是，本领域技术人员根据以上关系式(5)、(6)、(7)和(8)进行的各种等价的修改或变化也落入本发明实施例的范围内。
在一些可能的实现方式中，公共搜索空间资源为UE特定搜索空间资源的子集。这样配置能保证不同最大带宽的UE都能够同时监测公共搜索空间和UE特定搜索空间。
可选地，图1所示方法还可以包括：UE向网络设备发送指示信息，指示信息用于指示UE的最大带宽。例如，UE可以通过前导序列或随机接入消息3(Msg3)上报UE的最大带宽。
可选地，公共搜索空间资源包括同步信号块，公共搜索空间资源的中心RB的序号与同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000110
其中，
Figure PCTCN2018085000-appb-000111
为同步信号块的最低RB的序号，
Figure PCTCN2018085000-appb-000112
为公共搜索空间资源的中心RB的序号，W min为小区内多个UE的最大带宽中的最小值对应的RB的数量，w为公共搜索空间资源在频域上的传输带宽对应的RB的数量，m为同步信号块的RB的数量，w≤W min，并且当w为偶数时，公共搜索空间资源的中心RB为公共搜索空间资源在频域上的传输带宽对应的RB中的第w/2+1个RB。w可以是配置的或者预定义的，m和
Figure PCTCN2018085000-appb-000113
可以是预定义的。
这样，能够保证UE可以同时监测公共搜索空间和同步信号块。
可选地，如果w为偶数，且公共搜索空间资源的中心RB为公共搜索空间资源在频域 上的传输带宽对应的RB中的第w/2个RB，则公共搜索空间资源的中心RB的序号与同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000114
可选地，公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000115
与同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000116
满足如下关系式：
Figure PCTCN2018085000-appb-000117
可选地，公共搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000118
与同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000119
满足如下关系式：
Figure PCTCN2018085000-appb-000120
关系式(6)、(7)和(8)中的相关参数可以参考关系式(5)的相关描述，在此不再赘述。
还需要说明的是，本领域技术人员根据以上关系式(5)、(6)、(7)和(8)进行的各种等价的修改或变化也落入本发明实施例的范围内。
本发明另一实施例还提供了另一种通信方法，该方法适用于大带宽或多配置参数并行传输的场景，能够支持不同能力的UE盲检公共下行控制信息和UE特定下行控制信息，有助于减少不同能力的UE盲检的次数。图3所示为根据本发明实施例的通信方法的示意性流程图。如图3所示，该方法包括：
310、UE向网络设备上报指示信息，指示信息用于指示UE的最大带宽和/或UE是否支持多配置参数并行传输。
例如，UE可以通过前导序列或随机接入消息3(Msg3)发送指示信息。
320、网络设备接收该指示信息。
应理解，在大带宽场景下，该指示信息用于指示UE的最大带宽；在多配置参数并行传输的场景下，该指示信息用于指示UE是否支持多配置参数并行传输。
若UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽大于UE的最大带宽，或者UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输，则图3所示方法还可以包括：330和340，或者350和360。
330、网络设备在第一传输时间单元使用公共搜索空间资源发送第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用UE特定搜索空间资源发送第二UE特定下行控制信息。
需要说明的是，网络设备使用公共搜索空间资源发送第一UE特定下行控制信息和公共下行控制信息包括：网络设备使用公共搜索空间资源中的部分或全部资源发送公共下行控制信息和第一UE特定下行控制信息。
比如，公共搜索空间资源包括16个CCE，其中8个CCE用来发送公共下行控制信息，另外8个CCE用来发送UE特定下行控制信息；或者，4个CCE用来发送公共下行控制信息，8个CCE用来发送UE特定下行控制信息；或者，8个CCE用来发送公共下行控制信息，8个CCE用来发送UE特定下行控制信息；或者，4个CCE用来发送公共下行控制信息，4个CCE用来发送UE特定下行控制信息等。
类似地，网络设备使用UE特定搜索空间资源发送第二UE特定下行控制信息包括： 网络设备使用UE特定搜索空间资源中的部分或全部资源发送第二UE特定下行控制信息。
340、UE在第一传输时间单元使用公共搜索空间资源检测第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用UE特定搜索空间资源检测第二UE特定下行控制信息。
350、网络设备在第一传输时间单元使用UE特定搜索空间资源发送UE特定下行控制信息，在第二传输时间单元使用公共搜索空间资源仅发送公共下行控制信息。
需要说明的是，网络设备使用UE特定搜索空间资源发送UE特定下行控制信息包括：网络设备使用UE特定搜索空间资源中的部分或全部资源发送UE特定下行控制信息。网络设备使用公共搜索空间资源发送公共下行控制信息包括：网络设备使用公共搜索空间资源中的部分或全部资源发送公共下行控制信息。
360、UE在第一传输时间单元使用UE特定搜索空间资源检测UE特定下行控制信息，在第二传输时间单元使用公共搜索空间资源仅检测所述公共下行控制信息。
其中，第一传输时间单元与第二传输时间单元不同，第一传输时间单元与第二传输时间单元的时间顺序也不做限定。
应理解，若UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽小于或等于UE的最大带宽，或UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE支持多配置参数并行传输，则网络设备可以同时使用UE特定搜索空间资源和公共搜索空间资源发送UE特定下行控制信息和公共下行控制信息，相应地UE可以同时监测公共搜索空间和UE特定搜索空间资源。
因此，本发明实施例中的UE可以根据自身能力采取不同的方式盲检公共下行控制信息和UE特定下行控制信息。
具体地，UE不同时检测公共搜索空间资源和UE特定搜索空间资源包括：
UE在第一传输时间单元使用公共搜索空间资源检测第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用UE特定搜索空间资源检测第二UE特定下行控制信息；
或者，UE在第一传输时间单元使用UE特定搜索空间资源检测UE特定下行控制信息，在第二传输时间单元使用公共搜索空间资源仅检测公共下行控制信息。
第一UE特定下行控制信息和第二UE特定下行控制信息可以相同也可以不同，本发明实施例对此也不做限定。
具体地，UE同时监测公共搜索空间资源和UE特定搜索空间资源包括：
UE使用公共搜索空间资源检测UE特定下行控制信息和公共下行控制信息，并同时使用UE特定搜索空间资源检测UE特定下行控制信息。
需要说明的是，本发明实施例中，UE特定搜索空间资源和公共搜索空间资源在频域上可以共享部分频带，如图2所示。此时，UE特定搜索空间资源和公共搜索空间资源对应的配置参数相同。
或者，UE特定搜索空间资源和公共搜索空间资源在频域上也可以正交，即UE特定搜索空间资源和公共搜索空间资源在频域上互不重叠，如图4所示。此时UE特定搜索空间资源和公共搜索空间资源对应的配置参数可以相同也可以不同。
本发明另一实施例还提供了一种通信方法，该方法中配置了两种公共搜索空间资源， 这两种公共搜索空间资源用于传输不同的公共下行控制信息，UE根据这两种公共搜索空间资源与自身的最大带宽的关系，或者根据自身的多配置参数并行传输能力，采用不同的方式盲检公共下行控制信息。因此，本发明实施例适用于大带宽或多配置参数并行传输的场景，能够支持不同能力的UE盲检公共下行控制信息。图5所示为根据本发明实施例的通信方法500的示意性流程图。如图5示，该方法500包括如下内容。
510、UE向网络设备发送指示信息，该指示信息用于指示UE的最大带宽或UE是否支持多配置参数并行传输。
例如，UE可以通过前导序列或随机接入消息3(Msg3)发送该指示信息。
520，网络设备接收该指示信息。
应理解，在大带宽场景下，该指示信息用于指示UE的最大带宽；在多配置参数并行传输的场景下，该指示信息用于指示UE是否支持多配置参数并行传输。
网络设备接收到该指示信息之后，就可以根据UE的能力采用不同的方式发送第一公共下行控制信息和第二公共下行控制信息。
如果满足第一预设条件，则在520之后该方法500还可以包括：520和530。该第一预设条件可以包括：第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽大于UE的最大带宽；或者，第一公共搜索空间资源和第二公共搜索空间资源在频域上的带宽小于或等于UE的最大带宽，第一公共搜索空间资源和第二公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输。
530、网络设备在RAR时间窗内传输系统消息的传输时间单元上使用第一公共搜索空间资源发送第一公共下行控制信息和第二公共下行控制信息，并在RAR时间窗内不传输系统消息的传输时间单元上使用第二公共搜索资源发送第二公共下行控制信息。
需要说明的是，网络设备使用第一公共搜索空间资源发送第一公共下行控制信息和第二公共下行控制信息包括：网络设备使用第一公共搜索空间资源中的部分或全部资源发送第一公共下行控制信息和第二公共下行控制信息。网络设备使用第二公共搜索资源发送第二公共下行控制信息包括：网络设备使用第二公共搜索资源中的部分或全部资源发送第二公共下行控制信息。
540、UE在RAR时间窗内传输系统消息的传输时间单元上使用第一公共搜索空间资源检测第一公共下行控制信息和第二公共下行控制信息，并在RAR时间窗内不传输系统消息的传输时间单元上使用第二公共搜索资源检测第二公共下行控制信息。
如果满足第二预设条件，则在520之后该方法500还可以包括：550和560。该第二预设条件可以包括：第一公共搜索空间资源在频域上的带宽小于或等于UE的最大带宽，第二公共搜索空间资源在频域上的带宽大于UE的最大带宽；或者，第一公共搜索空间资源在频域上的带宽小于或等于UE的最大带宽，第一公共搜索空间资源与第二公共搜索空间资源对应的配置参数不同，且UE不支持第二公共搜索空间资源对应的配置参数。
550、网络设备仅使用第一公共搜索空间资源发送第一公共下行控制信息和第二公共下行控制信息。
560、UE仅使用第一公共搜索空间资源检测第一公共下行控制信息和第二公共下行控制信息。
如果满足第三预设条件，则在520之后该方法500还可以包括：570和580。该第三 预设条件可以包括：第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽小于或等于UE的最大带宽。
570、网络设备使用第一公共搜索空间资源发送第一公共下行控制信息，并使用第二公共搜索空间资源发送第二公共下行控制信息。
580、UE使用第一公共搜索空间资源检测第一公共下行控制信息，并使用第二公共搜索空间资源检测第二公共下行控制信息。
本发明实施例适用于大带宽或多配置参数并行传输的场景，能够支持不同能力的UE盲检公共下行控制信息。
应理解，第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽指的是：第一公共搜索空间资源在频域上的带宽、第二公共搜索空间资源在频域上的带宽以及第一公共搜索空间资源与第二公共搜索空间资源在频域上的间隔带宽。
例如，第一公共搜索空间资源和第二公共搜索空间资源在频域上的总带宽指的是：第一公共搜索空间资源的最高RB与第二公共搜索空间资源的最低RB之间的RB的数量，或第二公共搜索空间资源的最高RB与第一公共搜索空间资源的最低RB之间的RB的数量。
第一公共搜索空间资源用于传输第一公共下行控制信息和/或第二公共下行控制信息，第二公共搜索空间资源用于传输第二公共下行控制信息。第一公共下行控制信息包括用于调度系统消息的下行控制信息，第二公共下行控制信息包括用于调度UE RAR的下行控制信息。
可选地，第一公共搜索空间资源可以是通过MIB配置的，或者是由初始接入信息隐式指示的。其中，初始接入信息可以是同步信号(Synchronization Signal，SS)块的时频资源，同步信号块可以包括主同步信号(Primary SS)和/或辅同步信号(Secondary SS)，还可以包括MIB。
可选地，还可以由初始接入信息(如同步信号块的时频资源)隐式地指示第一公共搜索空间资源的一个或多个候选资源，然后通过MIB指示该一个或多个候选资源中的一个候选资源作为第一公共搜索空间资源。
可选地，第一公共搜索空间资源对应的配置参数可以为预定义的或者通过MIB指示的。
可选地，第二公共搜索空间资源可以是通过系统消息配置的。可选地，还可以由初始接入信息(如同步信号块的时频资源)隐式地指示第二公共搜索空间资源的一个或多个候选资源，然后通过系统消息指示该一个或多个候选资源中的一个候选资源作为第二公共搜索空间资源。
在一些实施例中，第二公共搜索空间资源对应的配置参数可以默认与第一公共搜索空间对应的配置参数相同。
在一些实施例中，可以通过系统消息配置第二公共空间搜索资源对应的配置参数。可选地，第二公共搜索空间资源和第一公共搜索空间资源对应的配置参数可以不同。例如，第一公共搜索空间资源对应第一配置参数，第二公共搜索空间对应第二配置参数。
应理解，第一公共搜索空间资源包括同步信号块，第一公共搜索空间资源的中心RB的序号与同步信号块的最低RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000121
其中，
Figure PCTCN2018085000-appb-000122
为同步信号块的最低RB的序号，
Figure PCTCN2018085000-appb-000123
为第一公共搜索空间资源的中心RB的序号，W min为小区内多个UE的最大带宽中的最小值对应的RB的数量，w 1为公共搜索空间资源在频域上的传输带宽对应的RB的数量，m为同步信号块的RB的数量，w 1≤W min，并且当w为偶数时，第一公共搜索空间资源的中心RB为第一公共搜索空间资源在频域上的传输带宽对应的RB中的第w 1/2+1个RB。
w 1可以是配置的或者预定义的，m和
Figure PCTCN2018085000-appb-000124
可以是预定义。
可选地，如果w 1为偶数，且第一公共搜索空间资源的中心RB为第一公共搜索空间资源在频域上的传输带宽对应的RB中的第w 1/2个RB，则第一公共搜索空间资源的中心RB的序号与同步信号块的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000125
可选地，第一公共搜索空间资源的最低RB的序号
Figure PCTCN2018085000-appb-000126
与同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000127
满足如下关系式：
Figure PCTCN2018085000-appb-000128
可选地，第一公共搜索空间资源的最高RB的序号
Figure PCTCN2018085000-appb-000129
与同步信号块的最低RB的序号
Figure PCTCN2018085000-appb-000130
满足如下关系式：
Figure PCTCN2018085000-appb-000131
关系式(10)、(11)和(12)中的相关参数可以参考关系式(9)的相关描述，在此不再赘述。
在满足以上关系式(9)～(10)时，UE可以同时监测第一公共搜索空间资源和同步信号块。
第二公共搜索空间资源可以包括同步信号块，也可以不包括同步信号块。
在一些实施例中，第二公共搜索空间资源不包括同步信号块，第二公共搜索空间资源的最低RB、中心RB或最高RB可以是系统下行带宽中任意一个RB，第二公共搜索空间资源在频域上占用的子带小于或等于小区的多个UE的最大带宽中的最小值W min。
第二公共搜索空间资源的最低RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000132
或者，第二公共搜索空间资源的中心RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000133
或者，第二公共搜索空间资源的最高RB的序号满足以下关系式：
Figure PCTCN2018085000-appb-000134
其中，
Figure PCTCN2018085000-appb-000135
为第二公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000136
为第二公共搜索空间资源的中心RB的序号，
Figure PCTCN2018085000-appb-000137
为第二公共搜索空间资源的最高RB的序号，w 2为第二公共搜索空间资源在频域上占用的子带的RB的数量，
Figure PCTCN2018085000-appb-000138
为下行带宽的RB的数量，下行带宽可以是系统的带宽，也可以是一段频带的带宽。
可选地，第一公共搜索空间资源和第二公共搜索空间资源在频域上共享部分频带，如 图6所示。此时第二公共搜索空间资源对应的配置参数与第一公共搜索空间资源对应的配置参数相同。
可选地，第一公共搜索空间资源和第二公共搜索空间在频域上正交，即第一公共搜索空间资源和第二公共搜索空间在频域上互不重叠，如图7所示。此时第二公共搜索空间资源对应的配置参数与第一公共搜索空间资源对应的配置参数可以相同也可以不同。
在一些实施例中，第二公共搜索空间资源不包括同步信号块，第二公共搜索空间资源的最低RB、中心RB或最高RB可以是系统下行带宽中任意一个RB。可选地，第二公共下行控制信息的比特开销Y满足如下关系式：
若
Figure PCTCN2018085000-appb-000139
则
Figure PCTCN2018085000-appb-000140
若
Figure PCTCN2018085000-appb-000141
则
Figure PCTCN2018085000-appb-000142
其中，L max为第二公共搜索空间资源在频域上占用的子带的RB的最大数量，
Figure PCTCN2018085000-appb-000143
为系统下行带宽对应的RB的数量。
根据以上关系式确定第二公共下行控制信息的比特开销，这样有利于降低下行控制信息的比特数，从而降低控制开销。
由于SI消息与使用不同配置参数的数据在频分复用时需要预留保护带，而现有技术中，不同周期的SI消息采用时分复用(Time Diversity Multiplexing，TDM)的方式发送，因此对于每种周期的SI消息来说，在与使用不同配置参数的数据频分复用时均需要预留保护带，这样需要预留较多的保护带，造成了频域资源的浪费。因此，本发明另一实施例提供了一种通信方法，通过在同一传输时间单元上发送多个周期不同的SI消息，并使该多个SI消息采用FDM的方式进行传输，有利于减少不同周期的SI消息与使用不同配置参数的数据通过FDM的方式并行传输时需要预留的保护带，从而有助于避免频域资源的浪费。图8所示为根据本发明实施例的通信方法的示意性流程图。如图8示，该方法包括：810、网络设备在同一传输时间单元上发送n个系统信息(System Information，SI)消息，n个SI消息的频域资源不同，n个SI消息的发送周期不同，n为大于或等于2的整数。820、UE接收该n个SI消息。
需要说明的是，n个SI消息使用相同的配置参数。该配置参数可以是预定义的或者通过系统消息指示的。
如图9所示，n个SI消息的SI窗口的子带FDM地分布在系统带宽内。这样在多配置参数并行传输的场景中，只需在该n个SI消息的n个子带的最外侧预留两个保护带，而无需为每个SI消息的子带预留两个保护带，有利于避免频域资源的浪费。
如图10所示，该n个SI消息对应的SI窗口的起始传输时间单元相同。图10中SI-win表示SI窗口。由于n个SI消息对应的SI窗口的周期不同，因此n个SI消息的SI窗口的分布呈现出如图10所示的嵌套结构。换句话说，在具有较长周期的SI窗口所在的时隙上包括较短周期的SI窗口。
n个SI消息的频域资源可以是预定义的，也可以是由网络设备配置的。
可选地，如图8所示，在810之前，该方法还可以包括：830、网络设备发送系统信息块1(System Information Block，SIB1)消息，n个SI消息的频域资源是根据该n个SI消息在SIB1消息中的索引确定的；840、UE接收该SIB1消息。UE接收到该SIB1消息之后，可以根据该n个SI消息在SIB1消息中的索引，确定n个SI消息的频域资源。例 如，n个SI消息中第k个SI消息对应的起始RB相对于第1个SI消息对应的起始RB的偏置值x满足：x＝(n–1)×m，其中m为一个SI消息的频域宽度对应的RB的数量，则第k个SI消息对应的起始RB为I RB+x，其中I RB为第1个SI消息对应的起始RB在系统带宽中的偏置值。I RB为通过广播信令或高层信令配置的。这里SI消息的排序是根据SIB1消息中的索引确定的。可选地，n个SI消息各自所在的时间窗口具有相同的起始传输时间单元。起始传输时间单元可以为起始帧、起始时隙或起始微时隙。起始帧指的是起始位置处的系统帧。
可选地，n个SI消息各自所在的时间窗口的起始传输时间单元与SIB1的起始传输时间单元的偏置是预定义的或通过SIB1配置的。例如，该偏置的取值可以为0，也可以为其他取值，本发明实施例对此不做限定。该偏置的取值为0时，SIB1与n个SI消息的具有相同的起始传输时间单元。
可选地，n个SI消息中第k个SI消息所在的时间窗口的起始子帧和起始时隙满足以下关系式：
Figure PCTCN2018085000-appb-000144
其中，n f为第k个SI消息所在时间窗口的起始子帧，n s为第k个SI消息所在时间窗口的起始时隙，n为预定义的值，T k为第k个SI消息所在时间窗口的周期，α offset为第k个SI消息所在窗口的起始时隙相对于SIB1的起始时隙的偏置。k为大于或等于2且小于或等于n的整数。
α offset可以是预定义的或高层信令配置的。
上文描述了根据本发明实施例的通信方法，下面将结合图11至图描述根据本发明实施例的网络设备和UE。
图11是根据本发明实施例的网络设备1100的结构示意图。图11所示网络设备1100可以用于实现图1、图3、图5或图8中网络设备的相关流程。如图11所示，网络设备1100可以包括处理单元1110和收发单元1120。
处理单元1110可以用于实现以下至少一个步骤的功能：图1所示方法中110。
收发单元1120可以用于实现以下至少一个步骤的功能：图1所示方法中120，图3所示方法中320、330和350，图5所示方法中520、530、550和570，图8所示方法中810和830。
处理单元，用于根据用户设备UE的最大带宽和公共搜索空间资源确定UE特定搜索空间资源；
收发单元，用于向所述UE发送配置信息，所述配置信息用于指示所述处理单元确定的所述UE特定搜索空间资源。
一种可能的实现方式，所述UE特定搜索空间资源和所述公共搜索空间资源在频域上的总带宽小于或等于所述UE的最大带宽。
另一种可能的实现方式，所述公共搜索空间资源的最低资源块RB的序号与所述UE特定搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000145
其中，
Figure PCTCN2018085000-appb-000146
为所述公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000147
为所述UE特定搜索空间资源的最低RB的序号，w为所述公共搜索空间资源在频域上的传输带宽对应的RB 的数量，v为所述UE特定搜索空间资源在频域上的传输带宽对应的RB的数量，W为所述UE的最大带宽对应的RB的数量，v≤W。
另一种可能的实现方式，所述公共搜索空间资源在频域上的带宽小于或等于小区内的多个UE的最大带宽中的最小值。
所述收发单元还用于，接收所述UE上报的指示信息，所述指示信息用于指示所述UE的最大带宽。
收发单元，用于：
若用户设备UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则在第一传输时间单元使用所述公共搜索空间资源发送第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源发送第二UE特定下行控制信息；
若用户设备UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则在第一传输时间单元使用所述UE特定搜索空间资源发送UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源仅发送公共下行控制信息；
若UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输，则在第一传输时间单元使用所述公共搜索空间资源发送第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源发送第二UE特定下行控制信息，
若UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输，则在第一传输时间单元使用所述UE特定搜索空间资源发送UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源仅发送公共下行控制信息；
其中，所述第一传输时间单元与所述第二传输时间单元不同。
所述收发单元还用于，接收所述UE上报的指示信息，所述指示信息用于指示所述UE的最大带宽和/或所述UE不支持多配置参数并行传输。
相关细节可结合参考上述方法实施例，为避免重复，这里不再赘述。图12所示为根据本发明另一实施例的网络设备1200的结构示意图。如图12所示，网络设备1200包括处理器1210、收发器1220和存储器1230，处理器1210、收发器1220和存储器1230通过内部连接通路互相通信，传递控制信号和/或数据信号。该存储器1230用于存储指令，该处理器1210用于执行该存储器1230存储的指令。收发器1220用于在处理器1210的控制下收发信号。
具体地，收发器1220用于实现图11所示的网络设备1100中的收发单元1120的功能。处理器1210用于实现图11所示的网络设备1100中的处理单元1110的功能，为简洁，在此不再赘述。
图13是根据本发明实施例的用户设备的结构示意图。图13所示用户设备可以用于实现图1、图3、图5或图8中用户设备的相关流程。如图13所示，用户设备可以包括处理单元1310和收发单元1320。
处理单元1310可以用于实现图1所示方法中140、图3所示方法中340和360、图5所示方法中540、560和580。
收发单元1320可以用于实现以下至少一个步骤的功能：图1所示方法中130，图3所示方法中310，图5所示方法中510，图8所示方法中820和840。
收发单元，用于接收网络设备发送的配置信息，所述配置信息用于指示为所述UE配置的UE特定搜索空间资源，所述UE特定搜索空间资源是根据所述UE的最大带宽和公共搜索空间资源确定的；
处理单元，用于所述UE根据所述收发单元接收到的所述配置信息采用所述UE特定搜索空间资源检测UE特定下行控制信息。
一种可能的实现方式，所述UE特定搜索空间资源和所述公共搜索空间资源在频域上的总带宽小于或等于所述UE的最大带宽。
另一种可能的实现方式，所述公共搜索空间资源的最低资源块RB的序号与所述UE特定搜索空间资源的最低RB的序号满足如下关系式：
Figure PCTCN2018085000-appb-000148
其中，
Figure PCTCN2018085000-appb-000149
为所述公共搜索空间资源的最低RB的序号，
Figure PCTCN2018085000-appb-000150
为所述UE特定搜索空间资源的最低RB的序号，w为所述公共搜索空间资源在频域上的传输带宽对应的RB的数量，v为所述UE特定搜索空间资源在频域上的传输带宽对应的RB的数量，W为所述UE的最大带宽对应的RB的数量，v≤W。
另一种可能的实现方式，所述公共搜索空间资源在频域上的带宽小于或等于小区内的多个UE的最大带宽中的最小值。
所述收发单元还用于，向所述网络设备发送指示信息，所述指示信息用于指示所述UE的最大带宽。
处理单元，还用于：
若用户设备UE特定搜索空间资源和公共搜索空间资源在频域上的总带宽大于UE的最大带宽，则不同时监测所述公共搜索空间资源和所述UE特定搜索空间资源；或者，
若UE特定搜索空间资源和公共搜索空间资源对应的配置参数不同，且UE不支持多配置参数并行传输，则不同时监测所述公共搜索空间资源和所述UE特定搜索空间资源。
所述处理单元具体用于：
在第一传输时间单元使用所述公共搜索空间资源检测第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源检测第二UE特定下行控制信息；或者，
在第一传输时间单元使用所述UE特定搜索空间资源检测所述UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源仅检测所述公共下行控制信息；
其中，所述第一传输时间单元与所述第二传输时间单元不同。
收发单元，用于向网络设备上报指示信息，所述指示信息用于指示所述UE的最大带宽和/或所述UE不支持多配置参数并行传输。
相关细节可结合参考上述方法实施例，为避免重复，这里不再赘述。
图14所示为根据本发明另一实施例的终端设备1400的结构示意图。如图14所示，终端设备1400包括处理器1410、收发器1420和存储器1430，处理器1410、收发器1420和存储器1430通过内部连接通路互相通信，传递控制信号和/或数据信号。该存储器1430用于存储指令，该处理器1410用于执行该存储器1430存储的指令。收发器1420用于在 处理器1410的控制下收发信号。
具体地，收发器1420用于实现图13所示的终端设备1300中的收发单元1320的功能。处理器1410用于实现图13所示的终端设备1300中的处理单元1310的功能，为简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明各个实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (8)

  1. 一种通信方法，其特征在于，包括：
    网络设备向用户设备UE发送第一配置信息，所述第一配置信息用于指示UE特定搜索空间资源；
    所述网络设备向所述UE发送第二配置信息，所述第二配置信息用于指示公共搜索空间资源。
  2. 根据权利要求1所述的方法，其特征在于，所述第二配置信息包括主信息块，
    所述第二配置信息用于指示公共搜索空间资源包括：
    所述网络设备通过主信息块指示公共搜索空间资源的一个或多个候选资源中的一个候选资源作为所述公共搜索空间资源，所述公共搜索空间资源的一个或多个候选资源是根据同步信号块资源确定的。
  3. 一种通信方法，其特征在于，包括：
    用户设备UE接收第一配置信息，根据所述第一配置信息确定UE特定搜索空间资源；
    所述UE接收第二配置信息，根据所述第二配置信息确定公共搜索空间资源；
    所述UE在第一传输时间单元使用所述公共搜索空间资源检测第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源检测第二UE特定下行控制信息；
    或者，
    所述UE在第一传输时间单元使用所述UE特定搜索空间资源检测所述UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源仅检测所述公共下行控制信息；
    其中，所述第一传输时间单元与所述第二传输时间单元不同。
  4. 根据权利要求3所述的方法，其特征在于，第二配置信息包括主信息块，
    所述UE接收第二配置信息，根据所述第二配置信息确定公共搜索空间资源包括：
    所述UE接收所述主信息块，根据所述主信息块确定公共搜索空间资源的一个或多个候选资源中的一个候选资源作为所述公共搜索空间资源，其中，所述公共搜索空间资源的一个或多个候选资源是根据同步信号块资源确定的。
  5. 一种网络设备，其特征在于，包括：
    收发单元，用于向用户设备UE发送第一配置信息，所述第一配置信息用于指示UE特定搜索空间资源；
    所述收发单元还用于向所述UE发送第二配置信息，所述第二配置信息用于指示公共搜索空间资源。
  6. 根据权利要求5所述的网络设备，其特征在于，所述第二配置信息包括主信息块，
    所述收发单元具体用于向所述UE发送所述主信息块，所述主信息块用于指示公共搜索空间资源的一个或多个候选资源中的一个候选资源作为所述公共搜索空间资源，所述公共搜索空间资源的一个或多个候选资源是根据同步信号块资源确定的。
  7. 一种用户设备，其特征在于，包括：
    收发单元，用于接收第一配置信息，根据所述第一配置信息确定UE特定搜索空间资源；
    所述收发单元还用于接收第二配置信息，根据所述第二配置信息确定公共搜索空间资源；
    处理单元，用于在第一传输时间单元使用所述公共搜索空间资源检测第一UE特定下行控制信息和公共下行控制信息，在第二传输时间单元使用所述UE特定搜索空间资源检测第二UE特定下行控制信息；或者，
    所述处理单元，用于在第一传输时间单元使用所述UE特定搜索空间资源检测所述UE特定下行控制信息，在第二传输时间单元使用所述公共搜索空间资源仅检测所述公共下行控制信息；
    其中，所述第一传输时间单元与所述第二传输时间单元不同。
  8. 根据权利要求7所述的用户设备，其特征在于，所述第二配置信息包括主信息块，
    所述收发单元具体用于接收所述主信息块，所述主信息块用于确定公共搜索空间资源的一个或多个候选资源中的一个候选资源作为所述公共搜索空间资源，其中，所述公共搜索空间资源的一个或多个候选资源是根据同步信号块资源确定的。
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