WO2021022458A1 - 搜索空间配置、随机接入方法和装置、存储介质 - Google Patents

搜索空间配置、随机接入方法和装置、存储介质 Download PDF

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Publication number
WO2021022458A1
WO2021022458A1 PCT/CN2019/099314 CN2019099314W WO2021022458A1 WO 2021022458 A1 WO2021022458 A1 WO 2021022458A1 CN 2019099314 W CN2019099314 W CN 2019099314W WO 2021022458 A1 WO2021022458 A1 WO 2021022458A1
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Prior art keywords
search space
pdcch
time window
random access
message
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PCT/CN2019/099314
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English (en)
French (fr)
Inventor
刘洋
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北京小米移动软件有限公司
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Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to EP19940843.6A priority Critical patent/EP4013173A4/en
Priority to US17/631,431 priority patent/US20220287080A1/en
Priority to CN201980001653.2A priority patent/CN110771248B/zh
Priority to PCT/CN2019/099314 priority patent/WO2021022458A1/zh
Publication of WO2021022458A1 publication Critical patent/WO2021022458A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a search space configuration, random access method and device, and storage medium.
  • Random access is a necessary process for establishing a wireless link between the terminal and the network. Only after the random access process is completed, the terminal and the base station can perform regular data transmission.
  • the embodiments of the present disclosure provide a search space configuration, a random access method and device, and a storage medium, so that a terminal using a 2-step random access process and a terminal using a 4-step random access process for random access can share random access Resources.
  • the technical solution is as follows:
  • a search space configuration method including:
  • the access network device generates search space configuration information, where the search space configuration information includes the configuration of the first search space and the configuration of the second search space, and the configuration of the first search space is used to indicate to carry the first physical downlink control channel PDCCH
  • the first search space of the first PDCCH is the PDCCH corresponding to message B in the 2-step random access process
  • the configuration of the second search space is used to indicate the second search space that carries the second PDCCH
  • the second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces;
  • the access network device sends the search space configuration information.
  • the first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.
  • sending the search space configuration information by the access network device includes:
  • the access network device sends the search space configuration information through a system message or a radio resource control message.
  • the system message is SIB1.
  • the method further includes:
  • the access network device sends configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window, and the first time window is
  • the terminal detects the time window of the first PDCCH, and the first time window is that the terminal detects the second PDCCH after sending the message 1 in the 4-step random access process
  • the second time window is the time window for the terminal to detect the first PDCCH after sending the message A in the 2-step random access process, and the second time window is adjacent to the first time window And a time window after the first time window.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • a search space configuration method including:
  • the terminal receives search space configuration information, where the search space configuration information includes the configuration of the first search space and the configuration of the second search space, and the configuration of the first search space is used to indicate the first physical downlink control channel PDCCH carrying the first Search space, the first PDCCH is the PDCCH corresponding to message B in the 2-step random access process, the configuration of the second search space is used to indicate the second search space carrying the second PDCCH, and the second PDCCH is 4 In the random access process, for the PDCCH corresponding to message 2, the first search space and the second search space are different search spaces;
  • the terminal stores the search space configuration information.
  • the first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.
  • the terminal receiving search space configuration information includes:
  • the terminal receives the search space configuration information through a system message or a radio resource control message.
  • the system message is SIB1.
  • the method further includes:
  • the terminal receives and stores configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window, and the first time window is the terminal
  • the time window of the first PDCCH is detected, and the first time window is the terminal detecting the second PDCCH after sending message 1 in the 4-step random access process Time window
  • the second time window is the time window for the terminal to detect the first PDCCH after sending the message A in the 2-step random access process
  • the second time window is adjacent to the first time window and A time window after the first time window.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • a random access method including:
  • the access network device receives the message A in the 2-step random access process sent by the first terminal;
  • the access network device determines a search space for carrying a third PDCCH from the first search space and the second search space, where the third PDCCH is the PDCCH corresponding to the response message of the message A;
  • the first search space is used to carry the first PDCCH
  • the first PDCCH is the PDCCH corresponding to message B in the 2-step random access process
  • the second search space is used to carry the second PDCCH.
  • the second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces.
  • the first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.
  • the access network device determining the search space for carrying the third PDCCH from the first search space and the second search space includes:
  • the access network device determines the first search space as a search space for carrying the third PDCCH.
  • the access network device determining the search space for carrying the third PDCCH from the first search space and the second search space includes:
  • the access network device determines the first search space as a search space for carrying the third PDCCH, and
  • the first time window is the same as the time window for the second terminal to receive message 2 after sending message 1 in the 4-step random access process.
  • the access network device determining the search space for carrying the third PDCCH from the first search space and the second search space further includes:
  • the second search space is determined as the search space for carrying the third PDCCH, and the second time window is and The first time window is adjacent and a time window after the first time window.
  • the method further includes:
  • the access network device receives the message 1 in the 4-step random access process sent by the second terminal;
  • the access network device uses the resource corresponding to the second search space to send the second PDCCH within the first time window.
  • a random access method including:
  • the terminal sends message A in the 2-step random access process
  • the terminal determines the search space for detecting the third PDCCH according to the search space configuration information, where the third PDCCH is the PDCCH corresponding to the response message of the message A;
  • the terminal detects the third PDCCH according to the determined search space
  • the search space configuration information includes a configuration of a first search space and a configuration of a second search space
  • the configuration of the first search space is used to indicate a first search space carrying a first PDCCH
  • the first PDCCH is The PDCCH corresponding to message B in the 2-step random access process.
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH.
  • the second PDCCH corresponds to message 2 in the 4-step random access process.
  • the first search space and the second search space are different search spaces corresponding to the same control resource set.
  • the first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.
  • the terminal determining the search space for detecting the third PDCCH according to the search space configuration information includes:
  • the terminal determines the first search space as a search space for detecting the third PDCCH.
  • the terminal determining the search space for detecting the third PDCCH according to the search space configuration information includes:
  • the terminal determines the first search space as the search space for detecting the third PDCCH in the first time window, and after the first time window and the second terminal send Message 1 in the 4-step random access process, The time window for receiving message 2 is the same.
  • the terminal determining the search space for detecting the third PDCCH according to the search space configuration information further includes:
  • the terminal determines the second search space as the search space for detecting the third PDCCH in the second time window, and the second time window is and The first time window is adjacent and a time window after the first time window.
  • the method further includes:
  • the terminal receives message B according to the detected third PDCCH.
  • a search space configuration device including:
  • the generating unit is configured to generate search space configuration information, where the search space configuration information includes the configuration of the first search space and the configuration of the second search space, and the configuration of the first search space is used to indicate that the first physical downlink control is carried
  • the first search space of the channel PDCCH the first PDCCH is the PDCCH corresponding to message B in the 2-step random access process
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH
  • the The second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces;
  • the sending unit is configured to send the search space configuration information.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the sending unit is configured to send the search space configuration information through a system message or a radio resource control message.
  • the system message is SIB1.
  • the sending unit is further configured to send configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window,
  • the first time window is the time window for the terminal to detect the first PDCCH after sending the message A in the 2-step random access process
  • the first time window is the time window for the terminal to send the message in the 4-step random access process
  • the second time window is the time window for detecting the first PDCCH after the terminal sends the message A in the 2-step random access process
  • the second time window is The first time window is adjacent and a time window after the first time window.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • a search space configuration device including:
  • the receiving unit is configured to receive search space configuration information, where the search space configuration information includes a configuration of a first search space and a configuration of a second search space, and the configuration of the first search space is used to indicate that the first physical downlink control is carried
  • the first search space of the channel PDCCH the first PDCCH is the PDCCH corresponding to message B in the 2-step random access process
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH
  • the The second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces;
  • the storage unit is configured to store the search space configuration information.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the receiving unit is configured to receive the search space configuration information through a system message or a radio resource control message.
  • the system message is SIB1.
  • the receiving unit is further configured to receive configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window,
  • the first time window is the time window for the terminal to detect the first PDCCH after sending the message A in the 2-step random access process
  • the first time window is the time window for the terminal to send the message in the 4-step random access process
  • the second time window is the time window for detecting the first PDCCH after the terminal sends the message A in the 2-step random access process
  • the second time window is A time window that is adjacent to and after the first time window;
  • the storage unit is further configured to store configuration information of the random access response window.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • a random access device including:
  • the receiving unit is configured to receive the message A in the 2-step random access process sent by the first terminal;
  • the determining unit is configured to determine a search space for carrying a third PDCCH from the first search space and the second search space, where the third PDCCH is the PDCCH corresponding to the response message of the message A;
  • a sending unit configured to send the third PDCCH on a resource corresponding to the determined search space
  • the first search space is used to carry the first PDCCH
  • the first PDCCH is the PDCCH corresponding to message B in the 2-step random access process
  • the second search space is used to carry the second PDCCH.
  • the second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the determining unit is configured to determine the first search space as a search space for carrying a third PDCCH.
  • the determining unit is configured to determine the first search space as a search space for carrying the third PDCCH if it is determined to send the response message of the message A within the first time window, so The first time window is the same as the time window for the second terminal to receive message 2 after sending message 1 in the 4-step random access process.
  • the determining unit is further configured to determine the second search space as the search space for carrying the third PDCCH if it is determined to send the response message of the message A within the second time window,
  • the second time window is a time window adjacent to the first time window and after the first time window.
  • the receiving unit is further configured to receive message 1 in the 4-step random access procedure sent by the second terminal;
  • the sending unit is further configured to send the second PDCCH using a resource corresponding to a second search space within the first time window.
  • a random access device including:
  • the sending unit is configured to send message A in the 2-step random access process
  • the determining unit is configured to determine a search space for detecting a third PDCCH according to search space configuration information, where the third PDCCH is the PDCCH corresponding to the response message of the message A;
  • the detecting unit is configured to use the determined search space to detect the third PDCCH;
  • the search space configuration information includes a configuration of a first search space and a configuration of a second search space
  • the configuration of the first search space is used to indicate a first search space carrying a first PDCCH
  • the first PDCCH is The PDCCH corresponding to message B in the 2-step random access process.
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH.
  • the second PDCCH corresponds to message 2 in the 4-step random access process.
  • PDCCH, the first search space and the second search space are different search spaces.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the determining unit is configured to determine the first search space as a search space for detecting a third PDCCH.
  • the determining unit is configured to determine the first search space as a search space for detecting a third PDCCH within a first time window, and the first time window and the second terminal randomly send 4 steps After message 1 in the access process, the time window for receiving message 2 is the same.
  • the determining unit is further configured to, if the terminal does not detect the third PDCCH in the first time window, the terminal determines the second search space to detect the third PDCCH in the second time window.
  • the second time window is a time window adjacent to the first time window and after the first time window.
  • the device further includes: a receiving unit configured to receive message B according to the detected third PDCCH.
  • a search space configuration device including:
  • a memory for storing processor executable instructions
  • the processor is configured to load and execute the executable instructions to implement the search space configuration method according to any one of the first aspect, or to implement the search space configuration method according to any one of the second aspect.
  • a random access device including:
  • a memory for storing processor executable instructions
  • the processor is configured to load and execute the executable instructions to implement the random access method according to any one of the third aspect, or to implement the random access method according to any one of the fourth aspect.
  • a computer-readable storage medium which can execute the search space of any one of the first aspect when the instructions in the computer-readable storage medium are executed by a processor
  • the configuration method, or the search space configuration method described in any one of the second aspect, or the random access method described in any one of the third aspect, or the random access method described in any one of the fourth aspect Access method are executed by a processor.
  • the terminal since the first PDCCH corresponding to message B and the second PDCCH corresponding to message 2 are carried in different search spaces, when the terminal receives the random access response, if the message A is sent first, then The first search space corresponding to the configuration of the first search space is used to detect the first PDCCH. If message 1 is sent first, the second search space corresponding to the configuration of the second search space is used to detect the second PDCCH, that is, The first PDCCH and the second PDCCH are separated by different search spaces, so that the terminal that adopts the 4-step random access process and the terminal that adopts the 2-step random access process send the same random preamble sequence on the same random access resource. In the case of MsgA and Msg1, the terminal can accurately identify the random access response message sent to itself.
  • Figure 1 is a flowchart of a 4-step random access process based on contention
  • Figure 2 is a flow chart of a contention-based 2-step random access process
  • Figure 3 is a schematic diagram of a network architecture provided by an embodiment of the present invention.
  • Fig. 4 is a flow chart showing a method for configuring a search space according to an exemplary embodiment
  • 5 and 6 are respectively schematic diagrams showing the correspondence relationship between a time window and a search space according to an exemplary embodiment
  • Fig. 7 is a flow chart showing a random access method according to an exemplary embodiment
  • Fig. 8 is a flow chart showing a random access method according to an exemplary embodiment
  • Fig. 9 is a flow chart showing a random access method according to an exemplary embodiment
  • Fig. 10 is a flow chart showing a random access method according to an exemplary embodiment
  • Fig. 11 is a schematic structural diagram showing a search space configuration device according to an exemplary embodiment
  • Fig. 12 is a schematic structural diagram of a search space configuration device according to an exemplary embodiment
  • Fig. 13 is a schematic structural diagram showing a random access device according to an exemplary embodiment
  • Fig. 14 is a schematic structural diagram showing a random access device according to an exemplary embodiment
  • Fig. 15 is a block diagram showing a search space configuration device or random access device according to an exemplary embodiment
  • Fig. 16 is a block diagram showing a search space configuration device or random access device according to an exemplary embodiment.
  • the random access process refers to the process from when the user sends a random access preamble sequence to try to access the network until a basic signaling connection is established with the network, and is used to enable the terminal to establish data communication with the network side.
  • the random access process is divided into a contention-based random access process and a non-contention-based random access process.
  • the contention-based random access process includes a 4-step random access process and a 2-step random access process. The following describes the two contention-based random access procedures respectively.
  • FIG. 1 is a flow chart of the 4-step random access process based on contention. As shown in Figure 1, the 4-step random access process includes:
  • step 1 the terminal sends Msg1 to the access network device.
  • the Msg1 includes a random access preamble.
  • the total number of random access preamble sequences available in each cell is 64.
  • Two subsets are defined among these 64 random access preamble sequences, and the random access preamble sequence set of each subset is notified to the terminal as part of the system information.
  • the terminal can select a random access preamble sequence from these two subsets and send it on the physical random access channel (PRACH, Physical Random Access Channel) resource (real-time frequency resource) .
  • PRACH Physical Random Access Channel
  • the random access preamble sequence available for contention-based random access and the PRACH resource used to send the random access preamble sequence are configured by the access network device, and the configuration result is notified to the terminal in the cell through a system message.
  • Step 2 The access network device sends Msg2 to the terminal.
  • the Msg2 includes a random access response (Random Access Response, RAR).
  • RAR Random Access Response
  • One Msg2 can contain multiple identifiers (ie index values) of the Preamble sequence sent by different terminals, and respond to random access requests from multiple terminals at the same time.
  • the terminal judges whether it has received a random access response by detecting whether the Msg2 carries the identifier of the Preamble sequence sent by it.
  • the access network equipment uses the Physical Downlink Control Channel (PDCCH) to schedule Msg2, and uses the random access private radio network temporary identifier (RA-RNTI, Random Access-Radio) for addressing (also called scrambling) , RA-RNTI is determined by the time-frequency resource position of the PRACH carrying Msg1.
  • PDCCH Physical Downlink Control Channel
  • RA-RNTI Random Access-Radio
  • the message 2 may include parameters such as the identifier of the random access preamble sequence corresponding to Msg1, the uplink transmission timing advance, the uplink resources allocated to the terminal, and the temporary C-RNTI.
  • step 3 the terminal sends Msg3 to the access network device.
  • the terminal After receiving Msg2 correctly, the terminal transmits Msg3 in the uplink resources allocated in Msg2 to complete the first scheduled transmission.
  • the Msg3 may include the identification information of the terminal. For example, C-RNTI identification or temporary C-RNTI identification.
  • Step 4 The access network device sends Msg4 to the terminal.
  • Access network equipment and terminals complete the final competition resolution through Msg4.
  • the content of Msg4 corresponds to the content of Msg3.
  • the access network equipment will use the temporary C-RNTI scrambled PDCCH to schedule Msg4.
  • the terminal uses the temporary C-RNTI to address on the PDCCH to obtain the time-frequency resource location of Msg4.
  • Msg4 is obtained from the time-frequency resource location.
  • Msg4 carries the contention resolution identity (CRI) through the Media Access Control Address (MAC) layer control element (CE).
  • MAC Media Access Control Address
  • CE Media Access Control Address
  • the terminal compares it with the identity sent in Msg3. The identification information is compared, if the two are the same, it is determined that the contention resolution is successful, and the terminal determines to complete the random access.
  • the access network equipment will use the PDCCH scrambled by the C-RNTI to schedule Msg4.
  • the terminal uses the C-RNTI to address on the PDCCH. If the addressing is successful, the contention resolution is successful, and the terminal determines to complete the random access.
  • FIG. 2 is a flow chart of a contention-based 2-step random access process. As shown in Figure 2, the 2-step random access process includes:
  • step 1 the terminal sends MsgA to the access network device, and the access network device receives MsgA.
  • the MsgA includes random access preamble sequence and physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) data.
  • the PUSCH data may include the identity information of the terminal, such as C-RNTI. That is, MsgA includes the contents of Msg1 and Msg3.
  • Step 2 The access network device sends MsgB to the terminal, and the terminal receives MsgB.
  • MsgB includes: random access response and contention resolution information. That is, MsgB includes the contents of Msg2 and Msg4. Wherein, the random access response includes the identifier of the random access preamble sequence, and the contention resolution information may include the contention resolution identifier.
  • the terminal in the random access process sends MsgA and Msg1 carrying the same random preamble sequence on the same RO resource in the same RACH time slot, because Msg2 (random access response message corresponding to Msg1) and MsgB (random access response message corresponding to MsgA) ) Needs to be addressed on the PDCCH through the random access private radio network temporary identifier (RA-RNTI, Random Access-Radio), and the RA-RNTI is determined by the time-frequency resource carrying Msg1 or MsgA, and the same RO in the same RACH slot corresponds to A unique RA-RNTI, so the terminal using the 4-step random access process and the 2-step random access process cannot recognize the random access response message sent to it, which affects the terminal
  • FIG. 3 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure.
  • the communication system may include: an access network 12 and a terminal 13.
  • the access network 12 includes several access network devices 120.
  • the access network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and so on.
  • the names of devices with base station functions may be different. For example, in LTE systems, they are called eNodeBs or eNBs; in 5G New Radio (NR) systems, Called gNodeB or gNB. With the evolution of communication technology, the name "base station" may be described and will change.
  • access network equipment For the convenience of description, the above-mentioned devices that provide wireless communication functions for terminals are collectively referred to as access network equipment.
  • the terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of User Equipment (UE), mobile stations ( Mobile Station, MS), terminal (terminal device), etc.
  • UE User Equipment
  • MS Mobile Station
  • terminal terminal device
  • the access network device 120 and the terminal 13 communicate with each other through a certain air interface technology, such as a Uu interface.
  • Fig. 4 is a flowchart showing a method for configuring a search space according to an exemplary embodiment. Referring to Figure 4, the method includes the following steps:
  • step 401 the access network device generates search space configuration information.
  • the search space configuration information includes a configuration of a first search space and a configuration of a second search space
  • the configuration of the first search space is used to indicate a first search space carrying a first PDCCH
  • the first PDCCH is The PDCCH corresponding to message B in the 2-step random access process.
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH.
  • the second PDCCH corresponds to message 2 in the 4-step random access process.
  • PDCCH, the first search space and the second search space are different search spaces.
  • the first search space and the second search space may correspond to the same CORESET (COntrol REsource SET, control resource set), or may correspond to different CORESETs.
  • CORESET is a time and frequency resource, on which the terminal attempts to use one or more search spaces to decode possible PDCCHs.
  • the starting position of CORESET can be any position in the time slot, or any position on the carrier in the frequency domain.
  • the size and time-frequency position of CORESET can be configured by the network side.
  • a search space is a group of candidate control channels composed of CCEs (Control Channel Elements) with the same aggregation level, and one or more CCEs are aggregated to carry the PDCCH.
  • One PDCCH can use 1, 2, 4, 8, 16 consecutive CCEs, and the number of CCEs used by a PDCCH is called the aggregation level.
  • CCE is a component of the search space when the terminal performs blind inspection.
  • a CCE includes 6 REGs (Resource Element Group, REG). Each REG includes a resource block on an OFDM symbol. In NR technology, the resource block is a measure in the frequency domain.
  • a resource block includes 12 consecutive sub-groups. Carrier.
  • a terminal can have multiple search spaces.
  • the first search space is different from the second search space, which means that the CCE corresponding to the first search space is different from the CCE corresponding to the second search space.
  • different search spaces can be distinguished by different identifications, that is, the configuration of the first search space and the configuration of the second search space can both be the identification of the search space, and the identification of the first search space and the second The logo of the search space is different.
  • the first search space carrying the first PDCCH means that the terminal may detect the first PDCCH on the candidate control channel corresponding to the first search space, that is, the PDCCH corresponding to the message B sent to the terminal itself.
  • the second search space carrying the second PDCCH means that the terminal may detect the second PDCCH on the candidate control channel corresponding to the second search space, that is, the PDCCH corresponding to the message 2 sent to the terminal itself.
  • step 402 the access network device sends the search space configuration information, and the terminal receives the search space configuration information.
  • sending the search space configuration information by the access network device includes:
  • the access network device sends the search space configuration information through a system message or a radio resource control message.
  • the terminal receives the search space configuration information through a system message or a radio resource control message.
  • the system message may be SIB (System Information Block, system information block) 1.
  • step 403 the terminal stores the search space configuration information.
  • the terminal can detect the PDCCH corresponding to message 2 or message B in the corresponding search space according to the search space configuration information in the subsequent random access process.
  • the method further includes:
  • the access network device sends configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window, and the first time window is
  • the terminal sends the MsgA in the 2-step random access process
  • it detects the time window of the first PDCCH
  • the first time window is the time window of the second PDCCH after the terminal sends the message 1 in the 4-step random access process.
  • Time window, the second time window is the time window for the terminal to detect the first PDCCH after sending the MsgA in the 2-step random access process
  • the second time window is the time window adjacent to the first time window and within The time window after the first time window.
  • the first time window and the second time window are both used to detect the PDCCH corresponding to MsgB, and the first time window is used to detect the PDCCH corresponding to message 2. It can be seen that the length of the time window used to detect the PDCCH corresponding to MsgB is longer than that used The length of the time window for detecting the PDCCH corresponding to message 2. This is because MsgA contains random access preamble sequence and PUSCH data. If the access network device receives the random access preamble sequence but does not receive the PUSCH data, it will wait a long time before sending MsgB, so MsgB corresponds to PDCCH needs to be detected in a long time.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • FIG. 5 and FIG. 6 respectively show the corresponding relationship between the first time window and the second time window and the first search space and the second search space.
  • the random access response window is the first time window
  • the offset (offset value) is the second time window.
  • the terminal that has sent MsgA can detect the corresponding MsgB in the first search space.
  • the terminal that has sent MsgA can detect the PDCCH corresponding to MsgB in the first search space or detect the PDCCH corresponding to MsgB in the second search space.
  • the offset value is the first time window
  • the random access response window is the second time window.
  • the terminal that has sent MsgA can detect the PDCCH corresponding to MsgB in the first search space.
  • the terminal that has sent MsgA may detect the PDCCH corresponding to MsgB in the first search space or detect the PDCCH corresponding to MsgB in the second search space.
  • the configuration information of the random access response window may be sent by the access network device to the terminal through a radio resource control message.
  • the second search space is only used to carry the second PDCCH, that is, only the PDCCH corresponding to message 2 in the 4-step random process is carried.
  • the second search space can also be used to carry the first PDCCH, that is, the second search space is multiplexed for the PDCCH corresponding to the message in the 2-step random process and the PDCCH in the 4-step random access process. PDCCH corresponding to message 2.
  • the second search space is reused for the PDCCH corresponding to the message in the 2-step random access process and the PDCCH corresponding to the message 2 in the 4-step random access process.
  • the terminal receives the random access response, if the MsgA is sent first, the configuration of the first search space is used. Detect the first PDCCH in the first search space. If message 1 was sent first, the second search space corresponding to the configuration of the second search space is used to detect the second PDCCH, that is, the first PDCCH is detected through a different search space.
  • the PDCCH is separated from the second PDCCH, so that the terminal can be accurate when the terminal using the 4-step random access process and the terminal using the 2-step random access process send MsgA and Msg1 carrying the same random preamble sequence on the same RO resource Identify the random access response message sent to itself.
  • Fig. 7 is a flow chart showing a random access method according to an exemplary embodiment. Referring to Figure 7, the method includes the following steps:
  • step 701 the access network device receives the MsgA in the 2-step random access process sent by the first terminal;
  • the access network device determines a search space corresponding to a third PDCCH from the first search space and the second search space, where the third PDCCH is the PDCCH corresponding to the response message of MsgA;
  • step 703 the access network device sends the third PDCCH on the resource corresponding to the determined search space.
  • the first search space is used to carry the first PDCCH
  • the first PDCCH is the PDCCH corresponding to MsgB in the 2-step random access process
  • the second search space is used to carry the second PDCCH
  • the second The PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces. That is, the first search space and the second search space indicated by the search space configuration information in the embodiment shown in FIG. 6.
  • the resource corresponding to the search space may be a time-frequency resource, such as the aforementioned candidate control channel.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the access network device determining the search space for carrying the third PDCCH from the first search space and the second search space includes:
  • the access network device determines the first search space as a search space for carrying the third PDCCH.
  • the access network device determining the search space for carrying the third PDCCH from the first search space and the second search space includes:
  • the access network device determines the first search space as a search space for carrying the third PDCCH, and the first A time window is the same as the time window for the second terminal to detect the second PDCCH after sending the message 1 in the 4-step random access process.
  • the access network device determining the search space for carrying the third PDCCH from the first search space and the second search space further includes:
  • the access network device sends the response message of A within the second time window, it is determined that the search space corresponding to the first PDCCH is the second search space, and the second time window is the same as the first search space. A time window adjacent to and after the first time window.
  • the method further includes:
  • the access network device receives the message 1 in the 4-step random access process sent by the second terminal;
  • the access network device uses the resource corresponding to the second search space to send the second PDCCH in the first time window.
  • Fig. 8 is a flow chart showing a random access method according to an exemplary embodiment. It can be implemented based on the search space configuration method shown in FIG. 4. Referring to Figure 8, the method includes the following steps:
  • step 801 the terminal sends the MsgA in the 2-step random access process
  • step 802 the terminal determines a search space for detecting a third PDCCH according to the search space configuration information, where the third PDCCH is the PDCCH corresponding to the response message of the MsgA;
  • step 803 the terminal detects the third PDCCH according to the determined search space
  • the search space configuration information includes a configuration of a first search space and a configuration of a second search space
  • the configuration of the first search space is used to indicate a first search space carrying a first PDCCH
  • the first PDCCH is The PDCCH corresponding to MsgB in the 2-step random access process.
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH.
  • the second PDCCH is the message 2 corresponding to the 4-step random access process.
  • the first search space and the second search space are different search spaces.
  • the first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.
  • the terminal determining the search space for detecting the third PDCCH according to the search space configuration information includes:
  • the first search space is determined as a search space for detecting the third PDCCH.
  • the terminal determining the search space for detecting the first PDCCH according to search space configuration information includes:
  • the terminal determines the first search space as the search space for detecting the third PDCCH in the first time window, and after the first time window and the second terminal send Message 1 in the 4-step random access process, The time window for detecting the second PDCCH is the same.
  • the terminal determining the search space for detecting the first PDCCH according to the search space configuration information further includes:
  • the terminal determines the second search space as the search space for detecting the third PDCCH in the second time window, and the second time window is and The first time window is adjacent and a time window after the first time window.
  • the method further includes:
  • the terminal receives MsgB according to the detected third PDCCH.
  • Fig. 9 is a flow chart showing a random access method according to an exemplary embodiment. It can be implemented based on the search space configuration method shown in FIG. 4. Referring to Figure 9, the method includes the following steps:
  • step 901 the terminal sends the MsgA in the 2-step random access process, and the access network device receives the MsgA in the 2-step random access process sent by the first terminal.
  • the MsgA includes random access preamble sequence and PUSCH data.
  • the PUSCH data may include identification information of the terminal, such as C-RNTI, temporary C-RNTI, and so on.
  • the PUSCH data may also include attribute information of the terminal, such as user type. This user type can be divided into low-latency users and high-latency users.
  • the terminal may use a pre-configured random access resource to send the first message.
  • the random access resources include at least one of time-frequency resources and code resources (ie, sequence resources).
  • the random access resource may be configured by the access network device through system messages.
  • the protocol stipulates that the available random access resources are the first set, and the access network device may use a subset of the first set as the available random access resources and send it to the terminal through a system message.
  • step 902 the access network device uses the first search space as the search space of the third PDCCH, and the third PDCCH is the PDCCH corresponding to the response message of the MsgA.
  • the response message of MsgA refers to the MsgB corresponding to MsgA received by the access network device. Therefore, the third PDCCH belongs to the first PDCCH.
  • step 903 the access network device sends the third PDCCH on the resource corresponding to the first search space.
  • the access network device will also send a response message of MsgA on the PDSCH indicated by the first PDCCH.
  • step 904 the terminal detects the third PDCCH in the first search space.
  • the access network device can successfully parse the PUSCH data in the MsgA sent by the UE, it means that the terminal can use a 2-step random access process to complete random access, and the access network device will send to the UE MsgB including random access response and contention resolution information.
  • the random access response includes the identifier of the random access preamble sequence
  • the contention resolution information may include the contention resolution identifier.
  • the access network device fails to parse the PUSCH data in MsgA, that is, the analysis fails, it means that the terminal will use the 4-step random access process to complete random access instead, and the access network device MsgB similar to Msg2 will be sent, that is, MsgB including random access response.
  • MsgA there may be two cases when the access network device fails to parse MsgA.
  • One is receiving the PRACH (i.e. random access preamble) in MsgA but not PUSCH data, and the other is receiving the data in MsgA.
  • PRACH and PUSCH data but PUSCH data decoding is unsuccessful.
  • PUSCH data decoding is unsuccessful.
  • the access network device When the access network device receives the PRACH (that is, the random access preamble sequence) in the MsgA but does not receive the PUSCH data, the access network device will wait for the PUSCH data, which takes a long time.
  • the access network device receives the PRACH and PUSCH data in MsgA, but the PUSCH data decoding is unsuccessful, decoding the PUSCH data will also take a long time, resulting in a delay in sending MsgB, so it can be the first PDCCH Set a longer random response time window in order to meet the transmission requirements of MsgB.
  • the terminal will detect the third PDCCH in the first time window and the second time window.
  • the first time window and the second time window please refer to the related content of FIG. 4, which is not described in detail here.
  • the second PDCCH may be detected only in the first time window.
  • This step 904 may include: the terminal determines the CCE that may carry the third PDCCH according to the first search space and the corresponding CORESET; and performs addressing through RA-RNTI on each CCE that may carry the third PDCCH. If the addressing is successful , The third PDCCH is decoded to obtain the identifier of the preamble sequence. If the identifier of the preamble sequence sent by the terminal through MsgA exists in the identifier of the obtained preamble sequence, it means that the third PDCCH is detected; if the identifier of the obtained preamble sequence is included If there is no identification of the preamble sequence sent by the terminal through MsgA, it means that the third PDCCH is not detected. If the addressing is unsuccessful, it means that the third PDCCH is not detected.
  • the RA-RNTI corresponds to the RO resource, and one RO resource has a unique RA-RNTI.
  • the corresponding relationship between the RO resource and the RA-RNTI can be configured by the access network equipment and notified to the terminals in the cell through system messages.
  • the method further includes:
  • step 905 MsgB is received according to the detected third PDCCH.
  • This step 905 may include: obtaining MsgB scheduling information according to the detected third PDCCH, where the scheduling information is used to indicate the time-frequency resource location of the PDSCH carrying the MsgB; and receiving the MsgB at the determined time-frequency resource location.
  • the scheduling information of the MsgB may be carried in DCI (Downlink Control Information, downlink control information).
  • DCI Downlink Control Information, downlink control information
  • the terminal receives the random access response, if the message A is sent first, the configuration of the first search space is adopted The corresponding first search space detects the first PDCCH. If message 1 was sent first, the second search space corresponding to the configuration of the second search space is used to detect the second PDCCH, that is, the first PDCCH is detected through a different search space.
  • the first PDCCH is separated from the second PDCCH, so that when the terminal using the 4-step random access process and the terminal using the 2-step random access process send MsgA and Msg1 carrying the same random preamble sequence on the same RO resource, the terminal can Accurately identify the random access response message sent to itself.
  • Fig. 10 is a flow chart showing a random access method according to an exemplary embodiment. It can be implemented based on the search space configuration method shown in FIG. 4. Referring to Figure 10, the method includes the following steps:
  • step 1001 the terminal sends MsgA to the access network device, and the access network device receives the MsgA sent by the terminal.
  • MsgA For related description of MsgA, refer to the foregoing step 901, and detailed description is omitted here.
  • step 1002 the access network device parses the PUSCH data in MsgA.
  • the access network device can successfully parse the PUSCH data in MsgA, it means that the terminal can use a 2-step random access process to complete random access, and the access network device will send to the terminal including random access response and contention resolution information MsgB.
  • the random access response includes the identifier of the random access preamble sequence
  • the contention resolution information may include the contention resolution identifier.
  • MsgA there may be two cases when the access network device fails to parse MsgA.
  • One is receiving the PRACH (i.e. random access preamble) in MsgA but not PUSCH data, and the other is receiving the data in MsgA.
  • PRACH and PUSCH data but PUSCH data decoding is unsuccessful.
  • PUSCH data decoding is unsuccessful.
  • step 1003 the access network device determines the time window for sending the response message of MsgA.
  • This step 1003 may include: if the access network device successfully parses the PUSCH data in MsgA, determining that the time window for sending MsgB is the first time window; or, if the access network device fails to parse the PUSCH data in MsgA, then determining to send The time window of MsgB is the second time window, and the first time window is the same as the time window for receiving message 2 after the second terminal sends message 1 in the 4-step random access process, and the second time window is The first time window is adjacent and a time window after the first time window.
  • the MsgB received by the terminal in the second time window is probably the rate that the access network device sends when the PUSCH data in MsgA is unsuccessfully parsed, but received in the first time window.
  • the received MsgB is probably sent by the access network device after successfully analyzing the PUSCH data in MsgA.
  • step 1004 if the access network device determines to send the MsgA response message within the first time window, the access network device determines the first search space as the search space for carrying the third PDCCH; if When the access network device determines to send the Msg B within the second time window, the second search space is determined as the search space for carrying the third PDCCH.
  • the terminal Since the terminal is more likely to receive MsgB in the second time window than it is to receive Msg2, it is not necessary to use the first search space to detect the third PDCCH in the second time window, but can use the same 4-step random access procedure The same second search space is used to detect the third PDCCH.
  • the terminal may receive message 2 in the 4-step random access process and Msg B in the 2-step random access process, so different search spaces are needed to distinguish between message 2 and Msg B corresponding PDCCH.
  • step 1005 the access network device sends the third PDCCH on the resource corresponding to the determined search space.
  • the method further includes:
  • step 1006 the terminal determines the first search space as the search space for detecting the third PDCCH in the first time window; if the third PDCCH is detected in the first time window, step 1008 is executed, if in the first time window, If the third PDCCH is not detected within a time window, step 1007 is executed.
  • step 1007 the terminal determines the second search space as the search space for detecting the third PDCCH in the second time window, and the second time window is adjacent to the first time window and in the first time window. A time window after a time window. If the third PDCCH is detected within the second time window, step 1008 is executed, and if the first PDCCH is not detected within the second time window, then the current process is exited.
  • step 1008 the terminal receives Msg B according to the detected third PDCCH.
  • This step 1008 may include: obtaining MsgB scheduling information according to the detected third PDCCH, where the scheduling information is used to indicate the time-frequency resource location of the PDSCH carrying the MsgB; and receiving the MsgB at the determined time-frequency resource location.
  • the received MsgB may include random access response and contention resolution information.
  • the random access response includes the identifier of the random access preamble sequence
  • the contention resolution information may include the contention resolution identifier. So as to complete the 2-step random access process.
  • the received MsgB is similar to Msg2 and can be used to instruct the terminal to fall back to the 4-step random access procedure for random access, for example, send message 3.
  • the Msg B may include parameters such as the identifier of the random access preamble sequence corresponding to the MsgA, the uplink transmission timing advance, the uplink resources allocated to the terminal, and the temporary C-RNTI.
  • the terminal when receiving the random access response, if the terminal sends MsgA first, the configuration corresponding to the first search space is adopted.
  • the first search space detects the first PDCCH. If message 1 is sent first, the second search space corresponding to the configuration of the second search space is used to detect the second PDCCH, that is, the first PDCCH is detected through a different search space.
  • control information can be multiplexed in one search space, which is beneficial to improve resource utilization.
  • Fig. 11 is a schematic structural diagram of a search space configuration device according to an exemplary embodiment.
  • the device has the function of realizing the access network equipment in the above method embodiment, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device includes: a generating unit 1101 and a sending unit 1102.
  • the generating unit 1101 is configured to generate search space configuration information, the search space configuration information including the configuration of the first search space and the configuration of the second search space, and the configuration of the first search space is used to indicate that the first physical downlink control is carried.
  • the first search space of the channel PDCCH is the PDCCH corresponding to the MsgB in the 2-step random access process
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH
  • the first The second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process
  • the first search space and the second search space are different search spaces
  • the sending unit 1102 is configured to send the search space configuration information.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the sending unit 1102 is configured to send the search space configuration information through a system message or a radio resource control message.
  • the system message is SIB1.
  • the sending unit 1102 is further configured to send configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window
  • the first time window is the time window for the terminal to detect the first PDCCH after sending the MsgA in the 2-step random access process
  • the first time window is the time window for the terminal to send the message in the 4-step random access process
  • the second time window is the time window for detecting the first PDCCH after the terminal sends the MsgA in the 2-step random access process
  • the second time window is the same as the
  • the first time window is adjacent and a time window after the first time window.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • Fig. 12 is a schematic structural diagram of a search space configuration device according to an exemplary embodiment.
  • the device has the function of realizing the terminal in the above method embodiment, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device includes: a receiving unit 1201 and a storage unit 1202.
  • the receiving unit 1201 is configured to receive search space configuration information, where the search space configuration information includes a configuration of a first search space and a configuration of a second search space, and the configuration of the first search space is used to indicate the first PDCCH carrying the first PDCCH.
  • the first PDCCH is the PDCCH corresponding to MsgB in the 2-step random access process
  • the configuration of the second search space is used to indicate the second search space that carries the second PDCCH
  • the second PDCCH is 4
  • the storage unit 1202 is configured to store the search space configuration information.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the receiving unit 1201 is configured to receive the search space configuration information through a system message or a radio resource control message.
  • the system message is SIB1.
  • the receiving unit 1201 is further configured to receive configuration information of a random access response window, where the configuration information of the random access response window is used to indicate the duration of the first time window and the duration of the second time window
  • the first time window is the time window for the terminal to detect the first PDCCH after sending the MsgA in the 2-step random access process
  • the first time window is the time window for the terminal to send the message in the 4-step random access process
  • the second time window is the time window for detecting the first PDCCH after the terminal sends the MsgA in the 2-step random access process
  • the second time window is the same as the A time window adjacent to and after the first time window;
  • the storage unit 1202 is further configured to store configuration information of the random access response window.
  • the configuration information of the random access response window includes the duration and offset value of the random access response window, the duration of the random access response window is used to indicate the duration of the first time window, and the The offset value is used to indicate the duration of the second time window; or, the duration of the random access response window is used to indicate the duration of the second time window, and the offset value is used to indicate the first The length of the time window.
  • Fig. 13 is a schematic structural diagram of a search space configuration device according to an exemplary embodiment.
  • the device has the function of realizing the access network equipment in the above method embodiment, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device includes: a receiving unit 1301, a determining unit 1302, and a sending unit 1303.
  • the receiving unit 1301 is configured to receive the MsgA in the 2-step random access process sent by the first terminal; the determining unit 1302 is configured to determine the search space for carrying the third PDCCH from the first search space and the second search space
  • the third PDCCH is the PDCCH corresponding to the response message of the MsgA;
  • the sending unit 1303 is configured to send the third PDCCH on the resource corresponding to the determined search space;
  • the search space configuration information includes the first search
  • the configuration of the space and the configuration of the second search space, the configuration of the first search space is used to indicate the first search space carrying the first PDCCH, and the first PDCCH is the PDCCH corresponding to MsgB in the 2-step random access process
  • the configuration of the second search space is used to indicate the second search space that carries the second PDCCH, the second PDCCH is the PDCCH corresponding to message 2 in the 4-step random access process, the first search space and the first search space
  • the second search space is a different search space.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the determining unit 1302 is configured to determine the first search space as a search space for carrying a third PDCCH.
  • the determining unit 1302 is configured to, if the access network device determines to send the MsgA response message within a first time window, determine the first search space to be used to carry the third In the search space of the PDCCH, the first time window is the same as the time window for the second terminal to receive the message 2 after sending the message 1 in the 4-step random access process.
  • the determining unit 1302 is further configured to, if the access network device determines to send the MsgA response message within a second time window, determine the second search space to be used to carry the first Three PDCCH search spaces, the second time window is a time window adjacent to the first time window and after the first time window.
  • the receiving unit 1301 is further configured to receive message 1 in the 4-step random access procedure sent by the second terminal;
  • the sending unit 1303 is further configured to send the second PDCCH using a resource corresponding to the second search space within the first time window.
  • Fig. 14 is a schematic structural diagram showing a search space configuration device according to an exemplary embodiment.
  • the device has the function of realizing the terminal in the above method embodiment, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device includes: a sending unit 1401, a determining unit 1402, and a detecting unit 1403.
  • the sending unit 1401 is configured to send the message A in the 2-step random access process;
  • the determining unit 1402 is configured to determine the search space for detecting the third PDCCH according to the search space configuration information, the third PDCCH being the message A
  • the detecting unit 1403 is configured to use the determined search space to detect the third PDCCH.
  • the search space configuration information includes a configuration of a first search space and a configuration of a second search space
  • the configuration of the first search space is used to indicate a first search space carrying a first PDCCH
  • the first PDCCH is The PDCCH corresponding to MsgB in the 2-step random access process.
  • the configuration of the second search space is used to indicate the second search space carrying the second PDCCH.
  • the second PDCCH is the message 2 corresponding to the 4-step random access process.
  • the first search space and the second search space are different search spaces.
  • the first search space and the second search space may correspond to the same CORESET, or may correspond to different CORESETs.
  • the determining unit 1402 is configured to determine the first search space as a search space for detecting the third PDCCH.
  • the determining unit 1402 is configured to determine the first search space as a search space for detecting the third PDCCH in a first time window, and the first time window and the second terminal are in the fourth step of sending After message 1 in the random access process, the time window for receiving message 2 is the same.
  • the determining unit 1402 is further configured to, if the terminal does not detect the third PDCCH in the first time window, the terminal determines the second search space to detect the second search space in the second time window.
  • the second time window is a time window adjacent to the first time window and after the first time window.
  • the device further includes: a receiving unit 1404 configured to receive MsgB according to the detected third PDCCH.
  • Fig. 15 is a block diagram showing a search space configuration device/random access device 1500 according to an exemplary embodiment.
  • the device 1500 may be the aforementioned access network device.
  • the device 1500 may include one or more of the following components: a processing component 1502, a memory 1504, a power component 1506, an input/output (I/O) interface 1512, and a communication component 1516.
  • the processing component 1502 generally controls the overall operations of the random access device 1500, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 1502 may include one or more processors 1520 to execute instructions to complete all or part of the steps of the foregoing method.
  • the processing component 1502 may include one or more modules to facilitate the interaction between the processing component 1502 and other components.
  • the processing component 1502 may include a multimedia module to facilitate the interaction between the multimedia component 15015 and the processing component 1502.
  • the memory 1504 is configured to store various types of data to support the operation of the random access device 1500.
  • the memory 1504 can be implemented by any type of volatile or non-volatile storage devices or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable and Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable and Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic Disk Magnetic Disk or Optical Disk.
  • the power component 1506 provides power for various components of the random access device 1500.
  • the power component 1506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the random access device 1500.
  • the I/O interface 1512 provides an interface between the processing component 1502 and the peripheral interface module.
  • the peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include but are not limited to: home button, volume button, start button, and lock button.
  • the communication component 1516 is configured to facilitate wireless communication between the access network device and other devices.
  • the communication component 1516 may provide a wireless network based on a communication standard, such as 2G, 3G, 4G, or 5G, or a combination thereof, so as to connect with the terminal device.
  • the random access device 1500 may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), A field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components are implemented to implement the search space configuration method and/or random access method described above.
  • ASIC application specific integrated circuits
  • DSP digital signal processors
  • DSPD digital signal processing devices
  • PLD programmable logic devices
  • FPGA field programmable gate array
  • controller a controller
  • microcontroller a microcontroller
  • microprocessor or other electronic components
  • a non-transitory computer-readable storage medium including instructions, such as a memory 1504 including instructions, which can be executed by the processor 1520 of the random access device 1500 to perform the search space configuration method and / Or random access method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
  • Fig. 16 is a block diagram showing a search space configuration device/random access device 1500 according to an exemplary embodiment.
  • the device 1600 may be the aforementioned terminal.
  • the random access device 1600 may include one or more of the following components: processing component 1602, memory 1604, power component 1606, multimedia component 1608, audio component 1610, input/output (I/O) interface 1612, sensor Component 1614, and communication component 1616.
  • the processing component 1602 generally controls the overall operations of the random access device 1600, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 1602 may include one or more processors 820 to execute instructions to complete all or part of the steps of the foregoing method.
  • the processing component 1602 may include one or more modules to facilitate the interaction between the processing component 1602 and other components.
  • the processing component 1602 may include a multimedia module to facilitate the interaction between the multimedia component 1608 and the processing component 1602.
  • the memory 1604 is configured to store various types of data to support the operation of the random access device 1600. Examples of such data include instructions for any application or method operating on the random access device 1600, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 1604 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic Disk Magnetic Disk or Optical Disk.
  • the power component 1606 provides power for various components of the random access device 1600.
  • the power component 1606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the random access device 1600.
  • the multimedia component 1608 includes a screen providing an output interface between the random access device 1600 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure related to the touch or slide operation.
  • the multimedia component 1608 includes a front camera and/or a rear camera. When the random access device 1600 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 1610 is configured to output and/or input audio signals.
  • the audio component 1610 includes a microphone (MIC), and when the random access device 1600 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio signals.
  • the received audio signal may be further stored in the memory 1604 or transmitted via the communication component 1616.
  • the audio component 1610 further includes a speaker for outputting audio signals.
  • the I/O interface 1612 provides an interface between the processing component 1602 and a peripheral interface module.
  • the peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include but are not limited to: home button, volume button, start button, and lock button.
  • the sensor component 1614 includes one or more sensors for providing the random access device 1600 with various aspects of state evaluation.
  • the sensor component 1614 can detect the on/off status of the random access device 1600 and the relative positioning of the components.
  • the component is the display and the keypad of the random access device 1600, and the sensor component 1614 can also detect the random access device. 1600 or the location of a component of the random access device 1600 changes, the presence or absence of contact between the user and the random access device 1600, the orientation or acceleration/deceleration of the random access device 1600, and the temperature change of the random access device 1600.
  • the sensor component 1614 may include a proximity sensor configured to detect the presence of nearby objects when there is no physical contact.
  • the sensor component 1614 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 1614 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 1616 is configured to facilitate wireless communication between the random access apparatus 1600 and other devices.
  • the communication component 1616 can access a wireless network based on a communication standard, such as 2G, 3G, 4G, or 5G, or a combination thereof, so as to realize random access.
  • the communication component 1616 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 1616 further includes an NFC module.
  • the random access device 1600 may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), A field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic components are implemented to implement the search space configuration method and/or random access method described above.
  • ASIC application specific integrated circuits
  • DSP digital signal processors
  • DSPD digital signal processing devices
  • PLD programmable logic devices
  • FPGA field programmable gate array
  • controller a controller
  • microcontroller a microcontroller
  • microprocessor or other electronic components
  • a non-transitory computer-readable storage medium including instructions, such as a memory 1604 including instructions, which can be executed by the processor 1620 of the random access device 1600 to perform the search space configuration method and / Or random access method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
  • An exemplary embodiment of the present disclosure also provides a communication system, which includes an access network device and a terminal.
  • the access network equipment includes the search space configuration device/random access device provided in the embodiment shown in FIG. 15, and the terminal includes the search space configuration device/random access device provided in the embodiment shown in FIG. 16.

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Abstract

本公开是关于一种搜索空间配置、随机接入方法和装置、存储介质,属于通信技术领域。所述方法包括:接入网设备生成并发送搜索空间配置信息,搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,第一PDCCH为2步随机接入过程中消息B对应的PDCCH,第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,第二PDCCH为4步随机接入过程中消息2对应的PDCCH,第一搜索空间和第二搜索空间为不同的搜索空间。使得采用2步随机接入过程的终端和4步随机接入过程进行随机接入的终端能够共享RO资源。

Description

搜索空间配置、随机接入方法和装置、存储介质 技术领域
本公开涉及通信技术领域,尤其涉及一种搜索空间配置、随机接入方法和装置、存储介质。
背景技术
随机接入是终端与网络之间建立无线链路的必经过程。只有在随机接入过程完成后,终端和基站才能进行常规的数据传输。
发明内容
本公开实施例提供了一种搜索空间配置、随机接入方法和装置、存储介质,使得采用2步随机接入过程的终端和4步随机接入过程进行随机接入的终端能够共享随机接入资源。所述技术方案如下:
根据本公开实施例的第一方面,提供一种搜索空间配置方法,所述方法包括:
接入网设备生成搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
所述接入网设备发送所述搜索空间配置信息。
可选地,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
可选地,所述接入网设备发送所述搜索空间配置信息,包括:
所述接入网设备通过系统消息或无线资源控制消息发送所述搜索空间配置信息。
可选地,所述系统消息为SIB1。
可选地,所述方法还包括:
所述接入网设备发送随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
根据本公开实施例的第二方面,提供一种搜索空间配置方法,所述方法包括:
终端接收搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
所述终端存储所述搜索空间配置信息。
可选地,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
可选地,所述终端接收搜索空间配置信息,包括:
所述终端通过系统消息或无线资源控制消息接收所述搜索空间配置信息。
可选地,所述系统消息为SIB1。
可选地,所述方法还包括:
所述终端接收并存储随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗, 且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
根据本公开实施例的第三方面,提供一种随机接入方法,所述方法包括:
接入网设备接收第一终端发送的2步随机接入过程中的消息A;
所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
所述接入网设备在确定出的搜索空间对应的资源上发送所述第三PDCCH;
其中,所述第一搜索空间用于承载第一PDCCH,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间用于承载第二PDCCH,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
可选地,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,包括:
所述接入网设备将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间。
可选地,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,包括:
若所述接入网设备确定在第一时间窗内发送所述A的响应消息,则所述接入网设备将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
可选地,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,还包括:
若所述接入网设备确定在第二时间窗内发送所述A的响应消息,则将所述第二搜索空间确定为用于承载第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述方法还包括:
所述接入网设备接收第二终端发送的4步随机接入过程中的消息1;
所述接入网设备在所述第一时间窗内,采用第二搜索空间对应的资源发送所述第二PDCCH。
根据本公开实施例的第四方面,提供一种随机接入方法,所述方法包括:
终端发送2步随机接入过程中的消息A;
所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
所述终端根据确定出的搜索空间,检测所述第三PDCCH;
其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为与同一控制资源集对应的不同的搜索空间。
可选地,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
可选地,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,包括:
所述终端将所述第一搜索空间确定为检测第三PDCCH的搜索空间。
可选地,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,包括:
所述终端将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
可选地,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,还包括:
若所述终端在第一时间窗内未检测到第三PDCCH,则所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述方法还包括:
所述终端根据检测到的第三PDCCH,接收消息B。
根据本公开实施例的第五方面,提供一种搜索空间配置装置,所述装置包括:
生成单元,被配置为生成搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
发送单元,被配置为发送所述搜索空间配置信息。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述发送单元,被配置为通过系统消息或无线资源控制消息发送所述搜索空间配置信息。
可选地,所述系统消息为SIB1。
可选地,所述发送单元,还被配置为发送随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移 值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
根据本公开实施例的第六方面,提供一种搜索空间配置装置,所述装置包括:
接收单元,被配置为接收搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
存储单元,被配置为存储所述搜索空间配置信息。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述接收单元,被配置为通过系统消息或无线资源控制消息接收所述搜索空间配置信息。
可选地,所述系统消息为SIB1。
可选地,所述接收单元,还被配置为接收随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗;
所述存储单元,还被配置为存储所述随机接入响应窗的配置信息。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
根据本公开实施例的第七方面,提供一种随机接入装置,所述装置包括:
接收单元,被配置为接收第一终端发送的2步随机接入过程中的消息A;
确定单元,被配置为从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
发送单元,被配置为在确定出的搜索空间对应的资源上发送所述第三PDCCH;
其中,所述第一搜索空间用于承载第一PDCCH,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间用于承载第二PDCCH,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述确定单元,被配置为将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间。
可选地,所述确定单元,被配置为若确定在第一时间窗内发送所述消息A的响应消息,则将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
可选地,所述确定单元,还被配置为若确定在第二时间窗内发送所述消息A的响应消息,则将所述第二搜索空间确定为用于承载第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述接收单元,还被配置为接收第二终端发送的4步随机接入过程中的消息1;
所述发送单元,还被配置为在所述第一时间窗内,采用第二搜索空间对应的资源发送所述第二PDCCH。
根据本公开实施例的第八方面,提供一种随机接入装置,所述装置包括:
发送单元,被配置为发送2步随机接入过程中的消息A;
确定单元,被配置为根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
检测单元,被配置为采用确定出的搜索空间,检测所述第三PDCCH;
其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述确定单元,被配置为将所述第一搜索空间确定为检测第三PDCCH的搜索空间。
可选地,所述确定单元,被配置为将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
可选地,所述确定单元,还被配置为若所述终端在第一时间窗内未检测到第三PDCCH,则所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述装置还包括:接收单元,被配置为根据检测到的第三PDCCH,接收消息B。
根据本公开实施例的第九方面,提供一种搜索空间配置装置,所述装置包括:
处理器;
用于存储处理器可执行指令的存储器;
其中,所述处理器被配置为加载并执行所述可执行指令以实现第一方面任一项所述的搜索空间配置方法,或者,实现第二方面任一项所述的搜索空间配置方法。
根据本公开实施例的第十方面,提供一种随机接入装置,所述装置包括:
处理器;
用于存储处理器可执行指令的存储器;
其中,所述处理器被配置为加载并执行所述可执行指令以实现第三方面任一项所述的随机接入方法,或者,实现第四方面任一项所述的随机接入方法。
根据本公开实施例的第十一方面,提供一种计算机可读存储介质,当所述计算机可读存储介质中的指令由处理器执行时,能够执行第一方面任一项所述的搜索空间配置方法,或者,实现第二方面任一项所述的搜索空间配置方法,或者,实现第三方面任一项所述的随机接入方法,或者,实现第四方面任一项所述的随机接入方法。
本公开的实施例提供的技术方案可以包括以下有益效果:
在本公开实施例中,由于消息B对应的第一PDCCH和消息2对应的第二PDCCH承载在不同的搜索空间,所以终端在接收随机接入响应时,如果在先发送的是消息A,则采用第一搜索空间的配置对应的第一搜索空间检测第一PDCCH,如果在先发送的是消息1,则采用第二搜索空间的配置对应的第二搜索空间检测第二PDCCH,也就是说,通过不同的搜索空间将第一PDCCH和第二PDCCH分开,从而在采用4步随机接入过程的终端和采用2步随机接入过程的终端在同一随机接入资源上发送携带相同随机前导序列的MsgA和Msg1的情况下,终端可以准确识别出发送给自己的随机接入响应消息。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性和解释性的,并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本公开的实施例,并与说明书一起用于解释本公开的原理。
图1为基于竞争的4步随机接入过程的流程图;
图2为基于竞争的2步随机接入过程的流程图;
图3是本发明实施例提供的网络架构示意图;
图4是根据一示例性实施例示出的一种搜索空间配置方法的流程图;
图5和图6分别是根据一示例性实施例示出的时间窗和搜索空间的对应关系示意图;
图7是根据一示例性实施例示出的一种随机接入方法的流程图;
图8是根据一示例性实施例示出的一种随机接入方法的流程图;
图9是根据一示例性实施例示出的一种随机接入方法的流程图;
图10是根据一示例性实施例示出的一种随机接入方法的流程图;
图11是根据一示例性实施例示出的一种搜索空间配置装置的结构示意图;
图12是根据一示例性实施例示出的一种搜索空间配置装置的结构示意图;
图13是根据一示例性实施例示出的一种随机接入装置的结构示意图;
图14是根据一示例性实施例示出的一种随机接入装置的结构示意图;
图15是根据一示例性实施例示出的一种搜索空间配置装置或随机接入装置的框图;
图16是根据一示例性实施例示出的一种搜索空间配置装置或随机接入装置的框图。
具体实施方式
这里将详细地对示例性实施例进行说明,其示例表示在附图中。下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反,它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
随机接入过程是指从用户发送随机接入前导序列开始尝试接入网络到与网络间建立起基本的信令连接之前的过程,用于使终端与网络侧建立数据通信。随机接入过程分为基于竞争的随机接入过程和基于非竞争的随机接入过程。目前,大多数终端采用的是基于竞争的随机接入过程。基于竞争的随机接入过程包括4步随机接入过程和2步随机接入过程。下面先分别介绍这两种基于竞争的随机接入过程。
基于竞争的随机接入过程分4步完成时,每一步为一条消息(Msg,Message)。在标准中,这4步称为Msg1~Msg4。图1为基于竞争的4步随机接入过程的流程图,如图1所示,该4步随机接入过程包括:
第1步,终端向接入网设备发送Msg1。该Msg1包括随机接入前导序列(preamble)。
其中,每个小区内可用的随机接入前导序列总数为64个。在这64个随机接入前导序列中定义了两个子集,每个子集的随机接入前导序列集合作为系统 信息的一部分被告知终端。当进行基于竞争的随机接入的时候,终端可以在这两个子集之中任意选取一个随机接入前导序列在物理随机接入信道(PRACH,Physical Random Access Channel)资源(即时频资源)上发送。
基于竞争的随机接入可用的随机接入前导序列以及用于发送随机接入前导序列的PRACH资源由接入网设备进行配置,并通过系统消息将配置结果通知到小区内的终端。
第2步,接入网设备向终端发送Msg2。该Msg2包括随机接入响应(Random Access Response,RAR)。
一条Msg2中可以包含多个由不同终端发送的Preamble序列的标识(即索引值),同时响应多个终端的随机接入请求。终端通过检测Msg2中是否携带了其所发送的Preamble序列的标识来判断是否收到了随机接入响应。
接入网设备采用物理下行控制信道(Physical Downlink Control Channel,PDCCH)调度Msg2,并通过随机接入专用无线网络临时标识(RA-RNTI,Random Access-Radio)进行寻址(也称为加扰),RA-RNTI由承载Msg1的PRACH的时频资源位置所确定。
该消息2中可以包括与Msg1对应的随机接入前导序列的标识、上行传输定时提前量、为终端分配的上行资源、临时C-RNTI等参数。
第3步,终端向接入网设备发送Msg3。
终端正确接收Msg2后,在Msg2中分配的上行资源中传输Msg3,完成第一次调度传输。
该Msg3中可以包括终端的身份标识信息。例如,C-RNTI标识或者临时C-RNTI标识。
第4步,接入网设备向终端发送Msg4。
接入网设备和终端通过Msg4完成最终的竞争解决。Msg4的内容和Msg3的内容相对应。
若终端未分配有C-RNTI,则接入网设备会采用临时C-RNTI加扰的PDCCH调度Msg4。终端采用临时C-RNTI在PDCCH上寻址,以得到Msg4的时频资源位置。寻址成功后,从该时频资源位置获取Msg4。Msg4通过媒体访问控制(Media Access Control Address,MAC)层控制单元(Control Element,CE)携带竞争解决标识(Contention Resolution Identity,CRI),终端在接收到该MAC CE后,与其在Msg3中发送的身份标识信息进行比较,二者相同则判定为竞争解决 成功,终端确定完成随机接入。
若终端已经分配有C-RNTI,则接入网设备会采用C-RNTI加扰的PDCCH调度Msg4。终端采用C-RNTI在PDCCH上寻址,寻址成功则表示竞争解决成功,终端确定完成随机接入。
图2为基于竞争的2步随机接入过程的流程图。如图2所示,该2步随机接入过程包括:
第1步,终端向接入网设备发送MsgA,接入网设备接收MsgA。
该MsgA包括随机接入前导序列和物理上行共享信道(Physical Uplink Shared Channel,PUSCH)数据。该PUSCH数据可以包含终端的身份标识信息,例如C-RNTI等。也即是,MsgA包括Msg1和Msg3的内容。
第2步,接入网设备向终端发送MsgB,终端接收MsgB。
MsgB包括:随机接入响应和竞争解决信息。也即是,MsgB包括Msg2和Msg4的内容。其中,随机接入响应包括随机接入前导序列的标识,竞争解决信息可以包含竞争解决标识。
假设4步随机接入过程和2步随机接入过程可以共用RO(RACH Occasion)机会,即共用发送随机接入前导序列的时频资源,如果采用4步随机接入过程的终端和采用2步随机接入过程的终端在同一RACH时隙的同一RO资源上发送携带相同随机前导序列的MsgA和Msg1,由于Msg2(Msg1对应的随机接入响应消息)和MsgB(MsgA对应的随机接入响应消息)需要通过随机接入专用无线网络临时标识(RA-RNTI,Random Access-Radio)在PDCCH上寻址,而RA-RNTI由承载Msg1或者MsgA的时频资源确定,同一RACH时隙的同一RO对应一个唯一的RA-RNTI,所以采用4步随机接入过程和2步随机接入过程的终端无法识别出发送给自己的随机接入响应消息,影响终端的接入。
图3示出的是本公开一个示意性实施例提供的通信系统的框图,如图3所示,该通信系统可以包括:接入网12和终端13。
接入网12中包括若干接入网设备120。接入网设备120可以是基站,所述基站是一种部署在接入网中用以为终端提供无线通信功能的装置。基站可以包括各种形式的宏基站,微基站,中继站,接入点等等。在采用不同的无线接入技术的系统中,具备基站功能的设备的名称可能会有所不同,例如在LTE系统 中,称为eNodeB或者eNB;在5G新空口(NR,New Radio)系统中,称为gNodeB或者gNB。随着通信技术的演进,“基站”这一名称可能描述,会变化。为方便描述,下文中将上述为终端提供无线通信功能的装置统称为接入网设备。
终端13可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备,以及各种形式的用户设备(User Equipment,UE),移动台(Mobile Station,MS),终端(terminal device)等等。为方便描述,上面提到的设备统称为终端。接入网设备120与终端13之间通过某种空口技术互相通信,例如Uu接口。
本公开实施例描述的通信系统以及业务场景是为了更加清楚地说明本公开实施例的技术方案,并不构成对本公开实施例提供的技术方案的限定,本领域普通技术人员可知,随着通信系统的演变和新业务场景的出现,本公开实施例提供的技术方案对于类似的技术问题,同样适用。
图4是根据一示例性实施例示出的一种搜索空间配置方法的流程图。参见图4,该方法包括以下步骤:
在步骤401中,接入网设备生成搜索空间配置信息。
其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET(COntrol REsource SET,控制资源集)对应,也可以与不同的CORESET对应。
其中,CORESET是一个时间和频率的资源,在该资源上终端试图使用一个或者多个搜索空间解码可能的PDCCH。CORESET的起始位置可以是时隙内任意位置,频域上也可以是载波上的任意位置。CORESET的大小和时频位置可以由网络侧配置。
一个搜索空间是一组拥有相同聚合等级的由CCE(Control Channel Element,控制信道单元)构成的候选控制信道,一个或多个CCE聚合在一起承载PDCCH。一个PDCCH可以使用1、2、4、8、16个连续的CCE,一个PDCCH使用的CCE 的个数被称为聚合等级。CCE是终端在进行盲检时搜索空间的组成单元。一个CCE包括6个REG(Resource Element Group,REG),每个REG包括一个OFDM符号上的一个资源块,在NR技术中,资源块是频域上的度量,一个资源块包括12个连续的子载波。
一个终端可以有多个搜索空间。在本公开实施例中,第一搜索空间与第二搜索空间不同,是指第一搜索空间对应的CCE与第二搜索空间对应的CCE不同。示例性地,不同的搜索空间可以采用不同的标识区分,也即是,第一搜索空间的配置和第二搜索空间的配置均可以为搜索空间的标识,且第一搜索空间的标识与第二搜索空间的标识不同。
承载第一PDCCH的第一搜索空间,是指终端可能在第一搜索空间对应的候选控制信道上,检测到第一PDCCH,即发送给终端自身的消息B对应的PDCCH。承载第二PDCCH的第二搜索空间,是指终端可能在第二搜索空间对应的候选控制信道上,检测到第二PDCCH,即发送给终端自身的消息2对应的PDCCH。
在步骤402中,接入网设备发送所述搜索空间配置信息,终端接收搜索空间配置信息。
可选地,所述接入网设备发送所述搜索空间配置信息,包括:
所述接入网设备通过系统消息或者无线资源控制消息发送所述搜索空间配置信息。
相应地,终端通过系统消息或者无线资源控制消息接收所述搜索空间配置信息。
示例性地,该系统消息可以为SIB(System Information Block,系统信息块)1。
在步骤403中,所述终端存储所述搜索空间配置信息。
以便于终端在后续随机接入过程在中根据搜索空间配置信息在对应的搜索空间内检测消息2或消息B对应的PDCCH。
可选地,所述方法还包括:
所述接入网设备发送随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的MsgA之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的MsgA 之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
也即是,第一时间窗和第二时间窗均用于检测MsgB对应的PDCCH,第一时间窗用于检测消息2对应PDCCH,可见,用于检测MsgB对应的PDCCH的时间窗的长度大于用于检测消息2对应的PDCCH的时间窗的长度。这是由于MsgA包含随机接入前导序列和PUSCH数据,若接入网设备接收到随机接入前导序列而没有接收到PUSCH数据时,会等待较长的时间,然后再发送MsgB,所以MsgB对应的PDCCH需要在较长的时间内检测。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
示例性地,图5和图6分别显示了第一时间窗和第二时间窗与第一搜索空间和第二搜索空间的对应关系。如图5所示,随机接入响应窗为第一时间窗,offset(偏移值)为第二时间窗,在第一时间窗中,发送过MsgA的终端可以在第一搜索空间检测MsgB对应的PDCCH,在第二时间窗中,发送过MsgA的终端可以在第一搜索空间检测MsgB对应的PDCCH或者在第二搜索空间检测MsgB对应的PDCCH。如图6所示,偏移值为第一时间窗,随机接入响应窗为第二时间窗,发送过MsgA的终端可以在第一搜索空间检测MsgB对应的PDCCH,在第二时间窗中,发送过MsgA的终端可以在第一搜索空间检测MsgB对应的PDCCH或者在第二搜索空间检测MsgB对应的PDCCH。
可选地,该随机接入响应窗的配置信息可以由接入网设备通过无线资源控制消息发送给终端。
在一种可能的实施方式中,所述第二搜索空间仅用于承载第二PDCCH,即仅用于承载4步随机过程中的消息2对应的PDCCH。
在另一种可能的实施方式中,第二搜索空间还可以用于承载第一PDCCH,即第二搜索空间复用于2步随机过程中的消息对应的PDCCH和4步随机接入过程中的消息2对应的PDCCH。例如,在前述第二时间窗中,第二搜索空间即复用于2步随机过程中的消息对应的PDCCH和4步随机接入过程中的消息2对应的PDCCH。
值得说明的是,前述步骤401-403与上述可选步骤可以任意组合。
由于消息B对应的第一PDCCH和消息2对应的第二PDCCH承载在不同的搜索空间,所以终端在接收随机接入响应时,如果在先发送的是MsgA,则采用第一搜索空间的配置对应的第一搜索空间检测第一PDCCH,如果在先发送的是消息1,则采用第二搜索空间的配置对应的第二搜索空间检测第二PDCCH,也就是说,通过不同的搜索空间将第一PDCCH和第二PDCCH分开,从而在采用4步随机接入过程的终端和采用2步随机接入过程的终端在同一RO资源上发送携带相同随机前导序列的MsgA和Msg1的情况下,终端可以准确识别出发送给自己的随机接入响应消息。
图7是根据一示例性实施例示出的一种随机接入方法的流程图。参见图7,该方法包括以下步骤:
在步骤701中,接入网设备接收第一终端发送的2步随机接入过程中的MsgA;
在步骤702中,所述接入网设备从第一搜索空间和第二搜索空间中,确定第三PDCCH对应的搜索空间,所述第三PDCCH为MsgA的响应消息对应的PDCCH;
在步骤703中,所述接入网设备在确定出的搜索空间对应的资源上发送第三PDCCH。
其中,所述第一搜索空间用于承载第一PDCCH,所述第一PDCCH为2步随机接入过程中MsgB对应的PDCCH,所述第二搜索空间用于承载第二PDCCH,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。即图6所示实施例中搜索空间配置信息所指示的第一搜索空间和第二搜索空间。
可选地,搜索空间对应的资源可以为时频资源,例如前述候选控制信道。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
在一种可能的实施方式中,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,包括:
所述接入网设备将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间。
在另一种可能的实施方式中,所述接入网设备从第一搜索空间和第二搜索 空间中,确定用于承载第三PDCCH的搜索空间,包括:
若所述接入网设备在第一时间窗内发送所述A的响应消息,则所述接入网设备将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,检测所述第二PDCCH的时间窗相同。
可选地,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,还包括:
若所述接入网设备在第二时间窗内发送所述A的响应消息,则确定所述第一PDCCH对应的搜索空间为第二搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述方法还包括:
所述接入网设备接收第二终端发送的4步随机接入过程中的消息1;
所述接入网设备在第一时间窗内,采用第二搜索空间对应的资源发送所述第二PDCCH。
值得说明的是,前述步骤701-703与上述可选步骤可以任意组合。
图8是根据一示例性实施例示出的一种随机接入方法的流程图。可以基于图4所示的搜索空间配置方法实现。参见图8,该方法包括以下步骤:
在步骤801中,终端发送2步随机接入过程中的MsgA;
在步骤802中,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,所述第三PDCCH为所述MsgA的响应消息对应的PDCCH;
在步骤803中,所述终端根据确定出的搜索空间,检测所述第三PDCCH;
其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中MsgB对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
在一种可能的实施方式中,所述终端根据搜索空间配置信息,确定检测第 三PDCCH的搜索空间,包括:
将所述第一搜索空间确定为检测第三PDCCH的搜索空间。
在另一种可能的实施方式中,所述终端根据搜索空间配置信息,确定检测第一PDCCH的搜索空间,包括:
所述终端将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,检测所述第二PDCCH的时间窗相同。
可选地,所述终端根据搜索空间配置信息,确定检测第一PDCCH的搜索空间,还包括:
若所述终端在第一时间窗内未检测到第三PDCCH,则所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述方法还包括:
所述终端根据检测到的第三PDCCH,接收MsgB。
值得说明的是,前述步骤801-804与上述可选步骤可以任意组合。
图9是根据一示例性实施例示出的一种随机接入方法的流程图。可以基于图4所示的搜索空间配置方法实现。参见图9,该方法包括以下步骤:
在步骤901中,终端发送2步随机接入过程中的MsgA,接入网设备接收第一终端发送的2步随机接入过程中的MsgA。
该MsgA包括随机接入前导序列和PUSCH数据。
可选地,该PUSCH数据可以包含终端的身份标识信息,例如C-RNTI、临时C-RNTI等。可选地,该PUSCH数据还可以包括终端的属性信息,例如用户类型等。该用户类型可以分为低时延用户和高时延用户。
示例性地,终端可以采用预先配置的随机接入资源发送该第一消息。
可选地,随机接入资源包括时频资源、码资源(即序列资源)中的至少一种。
可选地,随机接入资源可以是由接入网设备通过系统消息配置的。例如,协议约定可用的随机接入资源为第一集合,接入网设备可以将第一集合的一个子集作为可用随机接入资源,并通过系统消息发送给终端。
在步骤902中,接入网设备将第一搜索空间作为第三PDCCH的搜索空间, 所述第三PDCCH为所述MsgA的响应消息对应的PDCCH。
这里,MsgA的响应消息是指接入网设备收到的MsgA对应的MsgB,因此,第三PDCCH属于第一PDCCH。
在步骤903中,接入网设备在第一搜索空间对应的资源上发送第三PDCCH。
在该步骤903之后,接入网设备还会在第一PDCCH所指示的PDSCH上发送MsgA的响应消息。
在步骤904中,终端在第一搜索空间检测第三PDCCH。
在一种可能的实施方式中,若接入网设备能够成功解析UE发送的MsgA中的PUSCH数据,表示终端可以采用2步随机接入过程完成随机接入,接入网设备会向该UE发送包括随机接入响应和竞争解决信息的MsgB。其中,随机接入响应包括随机接入前导序列的标识,竞争解决信息可以包含竞争解决标识。在另一种可能的实施方式中,若接入网设备没有成功解析MsgA中的PUSCH数据,即解析失败,则表示终端将改为采用4步随机接入过程完成随机接入,接入网设备会发送与Msg2相似的MsgB,即包括随机接入响应的MsgB。
这里,接入网设备没有成功解析MsgA可能有两种情况,一种是接收到MsgA中的PRACH(即随机接入前导序列),而没有接收到PUSCH数据,另一种是接收到MsgA中的PRACH和PUSCH数据,但是PUSCH数据解码不成功。这两种情况可能由于以下因素造成,比如终端发送MsgA所采用的TA不准确(即发送时间不准)、信噪比低等,本公开对此不做限制。
在接入网设备接收到MsgA中的PRACH(即随机接入前导序列),而没有接收到PUSCH数据的情况下,接入网设备会等待PUSCH数据,耗时较长。在接入网设备接收到MsgA中的PRACH和PUSCH数据,但是PUSCH数据解码不成功的情况下,解码PUSCH数据也会耗费较长的时间,导致发送MsgB的时间延后,所以可以为第一PDCCH设置较长的随机响应时间窗,以便于满足MsgB的传输要求。在这种情况下,该步骤904中,终端会在第一时间窗和第二时间窗内检测第三PDCCH。该第一时间窗和第二时间窗的相关描述参见前述图4相关内容,在此不再详细描述。
需要说明的是,对于通过4步随机接入过程进行随机接入的终端,可以仅在第一时间窗内检测第二PDCCH。
该步骤904可以包括:终端根据第一搜索空间和对应的CORESET确定可能承载第三PDCCH的CCE;并在每个可能承载第三PDCCH的CCE上,通过 RA-RNTI进行寻址,若寻址成功,则对第三PDCCH进行解码,得到前导序列的标识,若得到的前导序列的标识中存在终端通过MsgA发送的前导序列的标识,则表示检测到第三PDCCH;若得到的前导序列的标识中不存在终端通过MsgA发送的前导序列的标识,则表示未检测到第三PDCCH。若寻址不成功,则表示未检测到第三PDCCH。
这里,RA-RNTI与RO资源对应,一个RO资源具有唯一的RA-RNTI。RO资源与RA-RNTI的对应关系可以由接入网设备配置,并通过系统消息告知小区内的终端。
若终端在第一搜索空间检测到第三PDCCH,则该方法还包括:
在步骤905中,根据检测到的第三PDCCH,接收MsgB。
即接收MsgA的响应消息。
该步骤905可以包括:根据检测到的第三PDCCH,获得MsgB的调度信息,该调度信息用于指示承载MsgB的PDSCH的时频资源位置;在确定出的时频资源位置接收MsgB。
示例性地,该MsgB的调度信息可以携带在DCI(Downlink Control Information,下行控制信息)中。
由于消息B对应的第一PDCCH和消息2对应的第二PDCCH承载在不同的搜索空间,所以终端在接收随机接入响应时,如果在先发送的是消息A,则采用第一搜索空间的配置对应的第一搜索空间检测第一PDCCH,如果在先发送的是消息1,则采用第二搜索空间的配置对应的第二搜索空间检测第二PDCCH,也就是说,通过不同的搜索空间将第一PDCCH和第二PDCCH分开,从而在采用4步随机接入过程的终端和采用2步随机接入过程的终端在同一RO资源上发送携带相同随机前导序列的MsgA和Msg1的情况下,终端可以准确识别出发送给自己的随机接入响应消息。
图10是根据一示例性实施例示出的一种随机接入方法的流程图。可以基于图4所示的搜索空间配置方法实现。参见图10,该方法包括以下步骤:
在步骤1001中,终端向接入网设备发送MsgA,接入网设备接收终端发送的MsgA。
MsgA的相关描述可以参见前述步骤901,在此省略详细描述。
在步骤1002中,接入网设备解析MsgA中的PUSCH数据。
示例性地,若接入网设备能够成功解析MsgA中的PUSCH数据,表示终端可以采用2步随机接入过程完成随机接入,接入网设备将向终端发送包括随机接入响应和竞争解决信息的MsgB。其中,随机接入响应包括随机接入前导序列的标识,竞争解决信息可以包含竞争解决标识。若接入网设备没有成功解析MsgA中的PUSCH数据,即解析失败,则表示终端将改为采用4步随机接入过程完成随机接入,接入网设备将向终端发送与Msg2相似的MsgB,即包括随机接入响应的MsgB。
这里,接入网设备没有成功解析MsgA可能有两种情况,一种是接收到MsgA中的PRACH(即随机接入前导序列),而没有接收到PUSCH数据,另一种是接收到MsgA中的PRACH和PUSCH数据,但是PUSCH数据解码不成功。这两种情况可能由于以下因素造成,比如终端发送MsgA所采用的TA不准确(即发送时间不准)、信噪比低等,本公开对此不做限制。
在步骤1003中,接入网设备确定发送MsgA的响应消息的时间窗。
该步骤1003可以包括:若接入网设备解析MsgA中的PUSCH数据成功,则确定发送MsgB的时间窗为第一时间窗;或者,若接入网设备解析MsgA中的PUSCH数据失败,则确定发送MsgB的时间窗为第二时间窗,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
相应的,由于两种MsgB的发送前提不同,终端在第二时间窗收到的MsgB大概率为接入网设备在MsgA中PUSCH数据解析不成功的情况下发送的,而在第一时间窗收到的MsgB大概率为接入网设备在成功解析MsgA中的PUSCH数据后发送的。
在步骤1004中,若所述接入网设备确定在第一时间窗内发送MsgA的响应消息,则所述接入网设备将第一搜索空间确定为用于承载第三PDCCH的搜索空间;若所述接入网设备确定在第二时间窗内发送所述Msg B,则将第二搜索空间确定为用于承载第三PDCCH的搜索空间。
由于终端在第二时间窗收到MsgB相对于收到Msg2的可能性较大,故在第二时间窗内无需采用第一搜索空间来检测第三PDCCH,而可以采用与4步随机接入过程相同的第二搜索空间来检测第三PDCCH。而在第一时间窗内,终端可能收到4步随机接入过程中的消息2和2步随机接入过程中的Msg B,所以需 要通过不同的搜索空间来区分消息2和Msg B对应的PDCCH。
在步骤1005中,所述接入网设备在确定出的搜索空间对应的资源上发送第三PDCCH。
在该步骤1005之后,该方法还包括:
在第三PDCCH对应的PDSCH上发送MsgA的响应消息。
在步骤1006中,终端将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间;若在第一时间窗内检测到第三PDCCH,则执行步骤1008,若在第一时间窗内未检测到第三PDCCH,则执行步骤1007。
在步骤1007中,所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。若在第二时间窗内检测到第三PDCCH,则执行步骤1008,若在第二时间窗内未检测到第一PDCCH,则退出当前流程。
在步骤1008中,所述终端根据检测到的第三PDCCH,接收Msg B。
该步骤1008可以包括:根据检测到的第三PDCCH,获得MsgB的调度信息,该调度信息用于指示承载MsgB的PDSCH的时频资源位置;在确定出的时频资源位置接收MsgB。
在该步骤1006~1008中,若是在第一时间窗中检测到第三PDCCH,则接收到的MsgB可以包括随机接入响应和竞争解决信息。其中,随机接入响应包括随机接入前导序列的标识,竞争解决信息可以包含竞争解决标识。从而完成2步随机接入过程。
若是在第二时间窗中检测到第三PDCCH,则接收到的MsgB与Msg2类似,可以用于指示终端回退到4步随机接入过程进行随机接入,例如,发送消息3。此时,该Msg B中可以包括与MsgA对应的随机接入前导序列的标识、上行传输定时提前量、为终端分配的上行资源、临时C-RNTI等参数。
由于MsgB对应的第一PDCCH和消息2对应的第二PDCCH承载在不同的搜索空间,所以终端在接收随机接入响应时,如果在先发送的是MsgA,则采用第一搜索空间的配置对应的第一搜索空间检测第一PDCCH,如果在先发送的是消息1,则采用第二搜索空间的配置对应的第二搜索空间检测第二PDCCH,也就是说,通过不同的搜索空间将第一PDCCH和第二PDCCH分开,从而在采用4步随机接入过程的终端和采用2步随机接入过程的终端在同一RO资源上发送携带相同随机前导序列的MsgA和Msg1的情况下,终端可以准确识别出发送给 自己的随机接入响应消息。
此外,由于在第二时间窗内无需区分第一搜索空间和第二搜索空间,则控制信息可以在一个搜索空间复用,有利于提高资源的利用率。
图11是根据一示例性实施例示出的一种搜索空间配置装置的结构示意图。该装置具有实现上述方法实施例中接入网设备的功能,该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。如图11所示,该装置包括:生成单元1101和发送单元1102。生成单元1101被配置为生成搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中MsgB对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;发送单元1102被配置为发送所述搜索空间配置信息。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述发送单元1102,被配置为通过系统消息或无线资源控制消息发送所述搜索空间配置信息。
可选地,所述系统消息为SIB1。
可选地,所述发送单元1102,还被配置为发送随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的MsgA之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的MsgA之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
图12是根据一示例性实施例示出的一种搜索空间配置装置的结构示意图。该装置具有实现上述方法实施例中终端的功能,该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。如图12所示,该装置包括:接收单元1201和存储单元1202。接收单元1201被配置为接收搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中MsgB对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;存储单元1202被配置为存储所述搜索空间配置信息。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述接收单元1201,被配置为通过系统消息或无线资源控制消息接收所述搜索空间配置信息。
可选地,所述系统消息为SIB1。
可选地,所述接收单元1201,还被配置为接收随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的MsgA之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的MsgA之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗;
所述存储单元1202,还被配置为存储所述随机接入响应窗的配置信息。
可选地,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
图13是根据一示例性实施例示出的一种搜索空间配置装置的结构示意图。该装置具有实现上述方法实施例中接入网设备的功能,该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。如图13所示,该装置包括:接收单 元1301、确定单元1302和发送单元1303。接收单元1301被配置为接收第一终端发送的2步随机接入过程中的MsgA;确定单元1302被配置为从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,所述第三PDCCH为所述MsgA的响应消息对应的PDCCH;发送单元1303被配置为在确定出的搜索空间对应的资源上发送第三PDCCH;其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中MsgB对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述确定单元1302,被配置为将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间。
可选地,所述确定单元1302,被配置为若所述接入网设备确定在第一时间窗内发送所述MsgA的响应消息,则将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
可选地,所述确定单元1302,还被配置为若所述接入网设备确定在第二时间窗内发送所述MsgA的响应消息,则将所述第二搜索空间确定为用于承载第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述接收单元1301,还被配置为接收第二终端发送的4步随机接入过程中的消息1;
所述发送单元1303,还被配置为在所述第一时间窗内,采用第二搜索空间对应的资源发送所述第二PDCCH。
图14是根据一示例性实施例示出的一种搜索空间配置装置的结构示意图。该装置具有实现上述方法实施例中终端的功能,该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。如图14所示,该装置包括:发送单元1401、确定单元1402和检测单元1403。发送单元1401被配置为发送2步随机接入过 程中的消息A;确定单元1402被配置为根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;检测单元1403被配置为采用确定出的搜索空间,检测第三PDCCH。
其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中MsgB对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
可选地,第一搜索空间和第二搜索空间可以与同一CORESET对应,也可以与不同的CORESET对应。
可选地,所述确定单元1402,被配置为将所述第一搜索空间确定为检测第三PDCCH的搜索空间。
可选地,所述确定单元1402,被配置为将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
可选地,所述确定单元1402,还被配置为若所述终端在第一时间窗内未检测到第三PDCCH,则所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
可选地,所述装置还包括:接收单元1404,被配置为根据检测到的第三PDCCH,接收MsgB。
图15是根据一示例性实施例示出的一种搜索空间配置装置/随机接入装置1500的框图,该装置1500可以为前述接入网设备。参照图15,装置1500可以包括以下一个或多个组件:处理组件1502,存储器1504,电力组件1506,输入/输出(I/O)的接口1512,以及通信组件1516。
处理组件1502通常控制随机接入装置1500的整体操作,诸如与显示,电话呼叫,数据通信,相机操作和记录操作相关联的操作。处理组件1502可以包括一个或多个处理器1520来执行指令,以完成上述的方法的全部或部分步骤。此外,处理组件1502可以包括一个或多个模块,便于处理组件1502和其他组 件之间的交互。例如,处理组件1502可以包括多媒体模块,以方便多媒体组件15015和处理组件1502之间的交互。
存储器1504被配置为存储各种类型的数据以支持在随机接入装置1500的操作。存储器1504可以由任何类型的易失性或非易失性存储设备或者它们的组合实现,如静态随机存取存储器(SRAM),电可擦除可编程只读存储器(EEPROM),可擦除可编程只读存储器(EPROM),可编程只读存储器(PROM),只读存储器(ROM),磁存储器,快闪存储器,磁盘或光盘。
电力组件1506为随机接入装置1500的各种组件提供电力。电力组件1506可以包括电源管理系统,一个或多个电源,及其他与为随机接入装置1500生成、管理和分配电力相关联的组件。
I/O接口1512为处理组件1502和外围接口模块之间提供接口,上述外围接口模块可以是键盘,点击轮,按钮等。这些按钮可包括但不限于:主页按钮、音量按钮、启动按钮和锁定按钮。
通信组件1516被配置为便于接入网设备和其他设备之间无线方式的通信。在本公开实施例中,所述通信组件1516可以提供基于通信标准的无线网络,如2G、3G、4G或5G,或它们的组合,从而与终端设备连接。
在示例性实施例中,随机接入装置1500可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现,用于执行上述搜索空间配置方法和/或随机接入方法。
在示例性实施例中,还提供了一种包括指令的非临时性计算机可读存储介质,例如包括指令的存储器1504,上述指令可由随机接入装置1500的处理器1520执行上述搜索空间配置方法和/或随机接入方法。例如,所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
图16是根据一示例性实施例示出的一种搜索空间配置装置/随机接入装置1500的框图,该装置1600可以为前述终端。参照图16,随机接入装置1600可以包括以下一个或多个组件:处理组件1602,存储器1604,电力组件1606,多媒体组件1608,音频组件1610,输入/输出(I/O)的接口1612,传感器组件1614,以及通信组件1616。
处理组件1602通常控制随机接入装置1600的整体操作,诸如与显示,电话呼叫,数据通信,相机操作和记录操作相关联的操作。处理组件1602可以包括一个或多个处理器820来执行指令,以完成上述的方法的全部或部分步骤。此外,处理组件1602可以包括一个或多个模块,便于处理组件1602和其他组件之间的交互。例如,处理组件1602可以包括多媒体模块,以方便多媒体组件1608和处理组件1602之间的交互。
存储器1604被配置为存储各种类型的数据以支持在随机接入装置1600的操作。这些数据的示例包括用于在随机接入装置1600上操作的任何应用程序或方法的指令,联系人数据,电话簿数据,消息,图片,视频等。存储器1604可以由任何类型的易失性或非易失性存储设备或者它们的组合实现,如静态随机存取存储器(SRAM),电可擦除可编程只读存储器(EEPROM),可擦除可编程只读存储器(EPROM),可编程只读存储器(PROM),只读存储器(ROM),磁存储器,快闪存储器,磁盘或光盘。
电力组件1606为随机接入装置1600的各种组件提供电力。电力组件1606可以包括电源管理系统,一个或多个电源,及其他与为随机接入装置1600生成、管理和分配电力相关联的组件。
多媒体组件1608包括在所述随机接入装置1600和用户之间的提供一个输出接口的屏幕。在一些实施例中,屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板,屏幕可以被实现为触摸屏,以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。所述触摸传感器可以不仅感测触摸或滑动动作的边界,而且还检测与所述触摸或滑动操作相关的持续时间和压力。在一些实施例中,多媒体组件1608包括一个前置摄像头和/或后置摄像头。当随机接入装置1600处于操作模式,如拍摄模式或视频模式时,前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件1610被配置为输出和/或输入音频信号。例如,音频组件1610包括一个麦克风(MIC),当随机接入装置1600处于操作模式,如呼叫模式、记录模式和语音识别模式时,麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器1604或经由通信组件1616发送。在一些实施例中,音频组件1610还包括一个扬声器,用于输出音频信号。
I/O接口1612为处理组件1602和外围接口模块之间提供接口,上述外围接口模块可以是键盘,点击轮,按钮等。这些按钮可包括但不限于:主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件1614包括一个或多个传感器,用于为随机接入装置1600提供各个方面的状态评估。例如,传感器组件1614可以检测到随机接入装置1600的打开/关闭状态,组件的相对定位,例如所述组件为随机接入装置1600的显示器和小键盘,传感器组件1614还可以检测随机接入装置1600或随机接入装置1600一个组件的位置改变,用户与随机接入装置1600接触的存在或不存在,随机接入装置1600方位或加速/减速和随机接入装置1600的温度变化。传感器组件1614可以包括接近传感器,被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件1614还可以包括光传感器,如CMOS或CCD图像传感器,用于在成像应用中使用。在一些实施例中,该传感器组件1614还可以包括加速度传感器,陀螺仪传感器,磁传感器,压力传感器或温度传感器。
通信组件1616被配置为便于随机接入装置1600和其他设备之间无线方式的通信。在本公开实施例中,所述通信组件1616可以接入基于通信标准的无线网络,如2G、3G、4G或5G,或它们的组合,从而实现随机接入。在一个示例性实施例中,通信组件1616经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。可选地,所述通信组件1616还包括NFC模组。
在示例性实施例中,随机接入装置1600可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现,用于执行上述搜索空间配置方法和/或随机接入方法。
在示例性实施例中,还提供了一种包括指令的非临时性计算机可读存储介质,例如包括指令的存储器1604,上述指令可由随机接入装置1600的处理器1620执行上述搜索空间配置方法和/或随机接入方法。例如,所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
本公开一示例性实施例还提供了一种通信系统,所述通信系统包括接入网设备和终端。所述接入网设备包括如图15所示实施例提供的搜索空间配置装置/随机接入装置,所述终端包括如图16所示实施例提供的搜索空间配置装置/随 机接入装置。
本领域技术人员在考虑说明书及实践这里公开的发明后,将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本公开的真正范围和精神由下面的权利要求指出。
应当理解的是,本公开并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。

Claims (51)

  1. 一种搜索空间配置方法,其特征在于,所述方法包括:
    接入网设备生成搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
    所述接入网设备发送所述搜索空间配置信息。
  2. 根据权利要求1所述的方法,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  3. 根据权利要求1或2所述的方法,其特征在于,所述接入网设备发送所述搜索空间配置信息,包括:
    所述接入网设备通过系统消息或无线资源控制消息发送所述搜索空间配置信息。
  4. 根据权利要求3所述的方法,其特征在于,所述系统消息为系统信息块SIB1。
  5. 根据权利要求1至4任一项所述的方法,其特征在于,所述方法还包括:
    所述接入网设备发送随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  6. 根据权利要求5所述的方法,其特征在于,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
  7. 一种搜索空间配置方法,其特征在于,所述方法包括:
    终端接收搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
    所述终端存储所述搜索空间配置信息。
  8. 根据权利要求7所述的方法,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  9. 根据权利要求7或8所述的方法,其特征在于,所述终端接收搜索空间配置信息,包括:
    所述终端通过系统消息或无线资源控制消息接收所述搜索空间配置信息。
  10. 根据权利要求9所述的方法,其特征在于,所述系统消息为系统信息块SIB1。
  11. 根据权利要求7至10任一项所述的方法,其特征在于,所述方法还包括:
    所述终端接收并存储随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  12. 根据权利要求11所述的方法,其特征在于,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
  13. 一种随机接入方法,其特征在于,所述方法包括:
    接入网设备接收第一终端发送的2步随机接入过程中的消息A;
    所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
    所述接入网设备在确定出的搜索空间对应的资源上发送所述第三PDCCH;
    其中,所述第一搜索空间用于承载第一PDCCH,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间用于承载第二PDCCH,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
  14. 根据权利要求13所述的方法,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  15. 根据权利要求13或14所述的方法,其特征在于,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,包括:
    所述接入网设备将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间。
  16. 根据权利要求13或14所述的方法,其特征在于,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,包括:
    若所述接入网设备确定在第一时间窗内发送所述消息A的响应消息,则所述接入网设备将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
  17. 根据权利要求16所述的方法,其特征在于,所述接入网设备从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,还包括:
    若所述接入网设备确定在第二时间窗内发送所述A的响应消息,则将所述第二搜索空间确定为用于承载第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  18. 根据权利要求16或17所述的方法,其特征在于,所述方法还包括:
    所述接入网设备接收第二终端发送的4步随机接入过程中的消息1;
    所述接入网设备在所述第一时间窗内,采用第二搜索空间对应的资源发送所述第二PDCCH。
  19. 一种随机接入方法,其特征在于,所述方法包括:
    终端发送2步随机接入过程中的消息A;
    所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
    所述终端根据确定出的搜索空间,检测所述第三PDCCH;
    其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
  20. 根据权利要求19所述的方法,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  21. 根据权利要求19或20所述的方法,其特征在于,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,包括:
    所述终端将所述第一搜索空间确定为检测第三PDCCH的搜索空间。
  22. 根据权利要求19或20所述的方法,其特征在于,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,包括:
    所述终端将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
  23. 根据权利要求22所述的方法,其特征在于,所述终端根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,还包括:
    若所述终端在第一时间窗内未检测到第三PDCCH,则所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  24. 根据权利要求19至23任一项所述的方法,其特征在于,所述方法还 包括:
    所述终端根据检测到的第三PDCCH,接收消息B。
  25. 一种搜索空间配置装置,其特征在于,所述装置包括:
    生成单元,被配置为生成搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
    发送单元,被配置为发送所述搜索空间配置信息。
  26. 根据权利要求25所述的装置,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  27. 根据权利要求25或26所述的装置,其特征在于,所述发送单元,被配置为通过系统消息或无线资源控制消息发送所述搜索空间配置信息。
  28. 根据权利要求27所述的装置,其特征在于,所述系统消息为系统信息块SIB1。
  29. 根据权利要求25至28任一项所述的装置,其特征在于,所述发送单元,还被配置为发送随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  30. 根据权利要求29所述的装置,其特征在于,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
  31. 一种搜索空间配置装置,其特征在于,所述装置包括:
    接收单元,被配置为接收搜索空间配置信息,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一物理下行控制信道PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间;
    存储单元,被配置为存储所述搜索空间配置信息。
  32. 根据权利要求31所述的装置,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  33. 根据权利要求31或32所述的装置,其特征在于,所述接收单元,被配置为通过系统消息或无线资源控制消息接收所述搜索空间配置信息。
  34. 根据权利要求33所述的装置,其特征在于,所述系统消息为系统信息块SIB1。
  35. 根据权利要求31至34任一项所述的装置,其特征在于,所述接收单元,还被配置为接收随机接入响应窗的配置信息,所述随机接入响应窗的配置信息用于指示第一时间窗的时长和第二时间窗的时长,所述第一时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,且所述第一时间窗为终端在发送4步随机接入过程中的消息1之后,检测第二PDCCH的时间窗,所述第二时间窗为终端在发送2步随机接入过程中的消息A之后,检测第一PDCCH的时间窗,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗;
    所述存储单元,还被配置为存储所述随机接入响应窗的配置信息。
  36. 根据权利要求35所述的装置,其特征在于,所述随机接入响应窗的配置信息包括随机接入响应窗的时长和偏移值,所述随机接入响应窗的时长用于指示所述第一时间窗的时长,所述偏移值用于指示所述第二时间窗的时长;或者,所述随机接入响应窗的时长用于指示所述第二时间窗的时长,所述偏移值用于指示所述第一时间窗的时长。
  37. 一种随机接入装置,其特征在于,所述装置包括:
    接收单元,被配置为接收第一终端发送的2步随机接入过程中的消息A;
    确定单元,被配置为从第一搜索空间和第二搜索空间中,确定用于承载第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
    发送单元,被配置为在确定出的搜索空间对应的资源上发送所述第三PDCCH;
    其中,所述第一搜索空间用于承载第一PDCCH,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间用于承载第二PDCCH,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
  38. 根据权利要求37所述的装置,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  39. 根据权利要求37或38所述的装置,其特征在于,所述确定单元,被配置为将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间。
  40. 根据权利要求37或38所述的装置,其特征在于,所述确定单元,被配置为若确定在第一时间窗内发送所述A的响应消息,则将所述第一搜索空间确定为用于承载第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
  41. 根据权利要求40所述的装置,其特征在于,所述确定单元,还被配置为若确定在第二时间窗内发送所述A的响应消息,则将所述第二搜索空间确定为用于承载第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  42. 根据权利要求40或41所述的装置,其特征在于,所述接收单元,还被配置为接收第二终端发送的4步随机接入过程中的消息1;
    所述发送单元,还被配置为在所述第一时间窗内,采用第二搜索空间对应的资源发送所述第二PDCCH。
  43. 一种随机接入装置,其特征在于,所述装置包括:
    发送单元,被配置为发送2步随机接入过程中的消息A;
    确定单元,被配置为根据搜索空间配置信息,确定检测第三PDCCH的搜索空间,所述第三PDCCH为所述消息A的响应消息对应的PDCCH;
    检测单元,被配置为采用确定出的搜索空间,检测所述第三PDCCH;
    其中,所述搜索空间配置信息包括第一搜索空间的配置和第二搜索空间的配置,所述第一搜索空间的配置用于指示承载第一PDCCH的第一搜索空间,所述第一PDCCH为2步随机接入过程中消息B对应的PDCCH,所述第二搜索空间的配置用于指示承载第二PDCCH的第二搜索空间,所述第二PDCCH为4步随机接入过程中消息2对应的PDCCH,所述第一搜索空间和所述第二搜索空间为不同的搜索空间。
  44. 根据权利要求43所述的装置,其特征在于,所述第一搜索空间和所述第二搜索空间与同一控制资源集对应,或者,与不同的控制资源集对应。
  45. 根据权利要求43或44所述的装置,其特征在于,所述确定单元,被配置为将所述第一搜索空间确定为检测第三PDCCH的搜索空间。
  46. 根据权利要求43或44所述的装置,其特征在于,所述确定单元,被配置为将所述第一搜索空间确定为在第一时间窗内检测第三PDCCH的搜索空间,所述第一时间窗与第二终端在发送4步随机接入过程中的消息1之后,接收消息2的时间窗相同。
  47. 根据权利要求46所述的装置,其特征在于,所述确定单元,还被配置为若所述终端在第一时间窗内未检测到第三PDCCH,则所述终端将第二搜索空间确定为在第二时间窗内检测第三PDCCH的搜索空间,所述第二时间窗为与所述第一时间窗相邻且在所述第一时间窗之后的时间窗。
  48. 根据权利要求43至47任一项所述的装置,其特征在于,所述装置还包括:接收单元,被配置为根据检测到的第三PDCCH,接收消息B。
  49. 一种搜索空间配置装置,其特征在于,所述装置包括:
    处理器;
    用于存储处理器可执行指令的存储器;
    其中,所述处理器被配置为加载并执行所述可执行指令以实现权利要求1至6任一项所述的搜索空间配置方法,或者,实现权利要求7至12任一项所述的搜索空间配置方法。
  50. 一种随机接入装置,其特征在于,所述装置包括:
    处理器;
    用于存储处理器可执行指令的存储器;
    其中,所述处理器被配置为加载并执行所述可执行指令以实现权利要求13至18任一项所述的随机接入方法,或者,实现权利要求19至24任一项所述的随机接入方法。
  51. 一种计算机可读存储介质,其特征在于,当所述计算机可读存储介质中的指令由处理器执行时,能够执行权利要求1至6任一项所述的搜索空间配置方法,或者,实现权利要求7至12任一项所述的搜索空间配置方法,或者,实现权利要求13至18任一项所述的随机接入方法,或者,实现权利要求19至24任一项所述的随机接入方法。
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