On-demand system information block transmission method, user equipment and network device

Abstract

Provided in the present application is an on-demand system information block transmission method. The method is executed in a user equipment and comprises: receiving a configuration message, wherein the configuration message comprises a parameter used by the user equipment to send a first signal and / or a parameter used to receive an on-demand system information block 1 (SIB1); on the basis of the configuration message, sending the first signal, the first signal being used for requesting the on-demand system information block (SIB1) from a base station; receiving an acknowledgement signal of the first signal; and monitoring a physical downlink control channel (PDCCH) for the on-demand SIB1, and receiving the on-demand SIB1.

Description

Method for transmitting on-demand system information block, user equipment and network equipment TECHNICAL FIELD

[0001] The present application relates to the field of communication systems, and more particularly, to a method for transmitting on-demand system information block, user equipment and network equipment. BACKGROUND

[0002] The Third Generation Partnership Project (3GPP) developed a Long Term Evolution (LTE) system, i.e. an Evolved Universal Mobile Telecommunications System Radio Access Network (E-UTRAN), for mobile access networks, in which one or more macro base stations are supported by base stations called eNodeB or eNB (Evolved NodeB). LTE is further developing towards a so-called 5G New Radio (NR) system, in which one or more cells are supported by base stations called Next Generation NodeB (gNB).

[0003] The 5G NR standard will support a variety of different services, each with very different requirements. These services include Enhanced Mobile Broadband (eMBB) techniques for high-speed data transmission, Ultra-Reliable Low Latency Communication (URLLC) techniques for devices that require low latency and high link reliability, and Massive Machine-Type Communication (mMTC) techniques for communications that require high energy efficiency, long service life. In the 5G system, the communication device supports a larger bandwidth, more antennas, etc., which increases the energy consumption of the 5G communication technology.

[0004] Considering that energy consumption has become a key part of the operating costs of operators, the energy cost of mobile networks accounts for about 23% of the total cost of operators. And most of the energy consumption comes from the radio access network. The power consumption of the radio access network is divided into two parts: one part is the dynamic part, which refers to the energy consumption generated during data transmission / reception, and the other part is the static part, which refers to the energy consumption that is always consumed for necessary operations of the wireless network device when there is no data transmission / reception. Based on this, the communication network needs to study solutions to reduce network energy consumption, reduce the impact of network energy consumption on the environment, and reduce the cost of operators.

[0005] TECHNICAL SCHEME

[0006] An object of the present application is to propose a method for transmitting on-demand system information block and a wireless communication device to solve the above technical problems.

[0007] The first aspect of the present application provides a method for transmitting on-demand system information block, which is performed in a user equipment, comprising: receiving a configuration message, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or to receive an on-demand system information block 1 (SIB1); sending the first signal according to the configuration message, wherein the first signal is used to request the on-demand system information block (SIB1) from a base station; receiving an acknowledgement signal of the first signal; and monitoring a physical downlink control channel (PDCCH) of the on-demand SIB1 and receiving the on-demand SIB1.

[0008] The second aspect of the present application provides a method for transmitting on-demand system information block, which is performed in a network equipment, comprising: transmitting a configuration message from a first base station of the network equipment to a user equipment, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or to receive an on-demand system information block 1 (SIB1); receiving, by a second base station of the network equipment, a first signal sent from the user equipment according to the configuration message, wherein the first signal is used to request the on-demand system information block (SIB1) from the second base station; sending, by the second base station, an acknowledgement signal of the first signal to the user equipment; and transmitting, by the second base station, the on-demand SIB1.

[0009] The third aspect of the present application provides a network equipment, comprising: a first base station configured to transmit a configuration message to a user equipment, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or to receive an on-demand system information block 1 (SIB1); and a second base station configured to receive a first signal sent from the user equipment according to the configuration message, wherein the first signal is used to request the on-demand system information block (SIB1) from the second base station, and to send an acknowledgement signal of the first signal to the user equipment, and to transmit the on-demand SIB1 to the user equipment.

[0010] The method disclosed in the present application can be implemented in a chip. The chip can comprise a processor configured to invoke and run a computer program stored in a memory to enable a device in which the chip is installed to perform the method disclosed in the present application.

[0011] The method disclosed in the present application can be programmed as computer executable instructions stored in a non-transitory computer readable medium. When loaded into a computer, the non-transitory computer readable medium instructs a processor of the computer to perform the method disclosed in the present application.

[0012] The non-transitory computer readable medium can include at least one of a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an EPROM, an electrically erasable programmable read-only memory, and a flash memory.

[0013] The method disclosed by the present application can be programmed as a computer program product, which causes a computer to execute the method disclosed by the present application.

[0014] The method disclosed by the present application can be programmed as a computer program, which causes a computer to execute the method disclosed by the present application.

[0015] The method disclosed by the present application can be implemented by a wireless communication device. The wireless communication device comprises a processor and a memory for storing a computer program, and the processor is configured to invoke and run the computer program stored in the memory.

[0016] Because the system information in the high-frequency network needs the network device to scan multiple beam transmissions to the terminal device to ensure the coverage of the entire cell, all system information occupies too many network resources through periodic transmission, resulting in the technical problem of large power consumption of the base station. Compared with the prior art, the embodiment of the present application provides a transmission method of on-demand system information block, receiving a configuration message, wherein the configuration message includes parameters for the user equipment to send a first signal and / or parameters for receiving an on-demand system information block 1SIB1; sending a first signal according to the configuration message, the first signal is used to request the base station for the on-demand system information block SIB1; receiving an acknowledgement signal of the first signal; and listening to the physical downlink control channel PDCCH of the on-demand SIB1, and receiving the on-demand SIB1. By executing the scheme of the above-mentioned embodiment, the base station no longer periodically sends the PDCCH and SIB1 of SIB1 to the user equipment, but negotiates with the user equipment the sending time period of the PDCCH and SIB1 of SIB1, so that the power consumption of the base station can be saved, and the operator cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] FIG. 1 shows a schematic diagram of the architecture of a wireless communication system of the present application.

[0019] FIG. 2 shows a block diagram of a wireless communication system comprising a user equipment, a base station and a core network device.

[0020] FIG. 3 is a flowchart of a method for transmitting an on-demand system information block according to an embodiment of the present disclosure.

[0021] FIG. 4A is an interaction diagram of a method for transmitting an on-demand system information block according to an embodiment of the present disclosure.

[0022] FIG. 4B is an interaction diagram of a method for transmitting an on-demand system information block according to another embodiment of the present disclosure.

[0023] FIG. 4C is an interaction diagram of a method for transmitting an on-demand system information block according to yet another embodiment of the present disclosure.

[0024] FIG. 5 is a parameter relationship diagram of a configuration message according to an embodiment of the present disclosure.

[0025] FIG. 6 illustrates a diagram of a starting position of a time period for monitoring a PDCCH of an OD SIB1 according to an embodiment of the present disclosure.

[0026] FIG. 7 illustrates a diagram of a starting position of a time period for monitoring a PDCCH of an OD SIB1 according to another embodiment of the present disclosure.

[0027] FIG. 8 illustrates a diagram of a starting position of a time period for monitoring a PDCCH of an OD SIB1 according to another embodiment of the present disclosure.

[0028] FIG. 9 illustrates a diagram of a starting position of a time period for monitoring a PDCCH of an OD SIB1 according to another embodiment of the present disclosure.

[0029] FIG. 10 is a parameter relationship diagram of a PDSCH processing capability 1 of a user equipment according to an embodiment of the present disclosure.

[0030] FIG. 11 is a parameter relationship diagram of a PDSCH processing capability 2 of a user equipment according to an embodiment of the present disclosure.

[0031] FIG. 12 illustrates a diagram of three multiplexing modes between an SSB and a CORESET0.

[0032] FIG. 13 illustrates a diagram of a time domain position of a PDCCH of a SIB1 in a multiplexing mode 1 based on an SSB and a COREST0.

[0033] FIG. 14 is a diagram of a MAC PDU structure according to an embodiment of the present disclosure.

[0034] FIG. 15 is a diagram of a MAC RAR structure according to an embodiment of the present disclosure.

[0035] FIG. 16 is a diagram of a UL grant field structure according to an embodiment of the present disclosure.

[0036] FIG. 17 illustrates a diagram of a start position of a time period of monitoring a PDCCH of an ODSIB1 according to another embodiment of the present application.

[0037] FIG. 18 illustrates a diagram of a paging occasion and a PEI occasion during reception of an ODSIB1 according to an embodiment of the present application.

[0038] FIG. 19 illustrates a diagram of a correction period during reception of an ODSIB1 according to an embodiment of the present application. Embodiments of the present application

[0039] The technical matters, structural features, implementation purposes and effects are described in detail with reference to the accompanying drawings by embodiments of the present application. Specifically, the terms in the embodiments of the present application are used only for the purpose of describing specific embodiments, and are not intended to limit the disclosure.

[0040] In the present application, "A or B" can mean "A only", "B only", or "both A and B".

[0041] In other words, in the present application, "A or B" can be interpreted as "A and / or B". For example, in the present application, "A, B, or C" can mean "A only", "B only", "C only", or "any combination of A, B, and C".

[0042] In the present application, a slash ( / ) or a comma used therein can mean "and / or". For example, "A / B" can mean "A and / or B". Thus, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0043] In the present application, "at least one of A and B" can mean "A only", "B only", or "both A and B". Also, in the present application, the expression "at least one of A or B" or "at least one of A and / or B" can be interpreted as "at least one of A and B".

[0044] In addition, in the present application, "at least one of A, B, and C" can mean "A only", "B only", "C only", or "any combination of A, B, and C". In addition, "at least one of A, B, or C" or "at least one of A, B, and / or C" can mean "at least one of A, B, and C".

[0045] Further, the terms "first", "second", etc. are used only for the purpose of description, and can not be understood as indicating or implying relative importance or implying a number of indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise explicitly and specifically limited.

[0046] Those skilled in the art will recognize and appreciate that the details of the described examples are merely illustrative and that the teachings herein can be applied in various alternative settings.

[0047] The technical solutions of the present application can be applied to various wireless communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), 5G communication system, 6G communication system or future wireless communication system, etc. The 5G communication system or 5G network can also be referred to as a New Radio (NR) system or NR network.

[0048] Exemplarily, the wireless communication system 100 to which the present application is applied is shown in FIG. 1. The wireless communication system 100 can include a core network 130, a base station 200, and a user equipment 10. The base station 200 can be a device that communicates with the user equipment (UE) 10. The base station 200 can provide communication coverage for a specific geographic area, and can communicate with the user equipment 10 located in the coverage area. For example, the base station 200a can provide communication coverage for the user equipment 10 in a first cell to communicate, and the base station 200b can provide communication coverage for the user equipment 10 in a second cell to communicate. In the following embodiment description, the base station 200, the base station 200a, and the base station 200b have similar architectures and functions.

[0049] The core network 130 can be an IP mobile communication network operated by a mobile communication operator. For example, the core network 130 can be a core network for a mobile communication operator who operates and manages the wireless communication system 100, or can be a core network for a virtual mobile communication operator (MVNO) such as a mobile virtual network operator (MVNO). The core network 130 can be connected to the base station 200 as a relay device for transmitting user data. The user equipment 10 transmits and receives user data via the core network 130. It should be noted that the communication of user data is not limited to IP communication, but can also be non-IP communication.

[0050] Optionally, the base station 200 can be an Evolutional Node B (eNB) in an LTE system, or the base station can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a base station in a future communication system, etc. The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to serve as a device that communicates with another base station.

[0051] Optionally, the user equipment 10 can be stationary or mobile. The user equipment 10 includes, but is not limited to, a device that is arranged to receive / transmit communication signals via a wired line connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another user equipment; and / or an Internet of Things (IoT) device. A user equipment arranged to communicate over a wireless interface can be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, a satellite or cellular phone; a Personal Communications System (PCS) terminal that can combine a cellular radiotelephone with data processing, facsimile, and data communications capabilities; a personal digital assistant (PDA) that can include a radiotelephone, pager, Internet / intranet access, a web browser, organizer, calendar, a note-taking facility, a game device, a camera, a navigation device, a global positioning system (GPS) device, or any other suitable equipment or devices that are configured to communicate via a wireless or wired medium. An access terminal can be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital assistant, a handheld device having wireless communication functions, a computing device, or other processing devices connected to a wireless modem, an in-vehicle device, a wearable device, a user equipment in a 5G network, or a user equipment in a future evolved PLMN, etc.

[0052] Optionally, two or more UEs (e.g., user devices 10) can communicate directly using one or more sidelink channels (e.g., without using the base station as an intermediary to communicate with one another). For example, user devices 10 can communicate using Point to Point (P2P) communications, Device to Device (D2D) communications, Vehicle-to-Everything (V2X) protocols (which can include Vehicle-to-Vehicle (V2V) protocols, Vehicle-to-Infrastructure (V2I) protocols, or the like), a mesh network, or the like, or combinations thereof. In this case, the user devices 10 can perform scheduling operations, resource selection operations, and other operations described elsewhere herein as being performed by the base station 200.

[0053] In embodiments of the application, the base station 200 can perform uplink (UL) and downlink (DL) transmissions with the user devices 10.

[0054] Referring to FIG. 2, a communication system includes a user equipment (UE) 10, a base station 200, and a core network device 30. Connections between devices and device components are shown as lines and arrows in the figure. The user equipment 10 can include a processor 11, a memory 12, and a transceiver 13. The base station 200 can include a processor 201, a memory 202, and a transceiver 203. The core network device 300 can include a processor 31, a memory 32, and a transceiver 33. Each processor 11, 201, 31 can execute respective program instructions to implement the functions, processes, and / or methods provided by any of the embodiments of the present application. Wireless interface protocol layers can be implemented in the processors 11, 201, 301. Each memory 12, 202, 32 can store various programs and information to cooperate with the operation of the connected processor. Each transceiver 13, 203, 33 can be coupled to the processor for transmitting and / or receiving radio signals or wired signals. The base station 200 can be one of an eNB, a gNB, an Access Point (AP), a Transmit-Receive Point (TRP), or other types of wireless nodes, and can configure wireless resources for the user equipment 10.

[0055] Each processor 11, 201, 31 can include an application-specific integrated circuit (ASIC), other chipset, logic circuit and / or a data processing device. Each memory 12, 202, 32 can include a read-only memory (ROM), a random access memory (RAM), a flash memory, a memory card, a storage medium and / or other storage device. Each transceiver 13, 203, 33 can include a baseband circuit and a radio frequency (RF) circuit to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform tasks as described herein. The modules can be stored in the memories and executed by the processors. The memories can be implemented within the processors or external to the processors in which case that which can be connected to the processors through various means as is known in the art.

[0056] In the embodiment, the core network device 30 can be a node in an LTE core network or a 5G core network 130, including a user plane function (UPF), a session management function (SMF), a mobile management function (AMF), a unified data management (UDM), a policy control function (PCF), a control plane (CP) / user plane (UP) separation (CUPS), an identity authentication server (AUSF), a network slice selection function (NSSF), and a network exposure function (NEF).

[0057] Please refer to FIG. 1 and FIG. 2. As shown in FIG. 1, the base station 200 can communicate with multiple user equipment 10 located in a coverage area (cell). The base station 200 can allocate uplink radio resources to each user equipment 10, and it is up to the user equipment 10 to determine which data of which radio bearer can be transmitted in the radio resources allocated by the base station 200 to the user equipment 10. For the uplink radio resources allocated by the base station 200 based on the uplink grant (UL grant), the user equipment 10 needs to determine the total amount of data of each logic channel (LCH) included in the media access control protocol data unit (MAC PDU). The user equipment 10 also needs to allocate resources for the control element (CE) of the MAC. That is, the uplink resources allocated by the base station 200 to the user equipment through the uplink grant are determined. According to the configuration given in the logical channel configuration parameter (LogicalChannelConfig) in the radio resource control (RRC) signaling sent by the base station 200. The user equipment 10 can determine which data of which logic channel to place in the resources allocated by the base station 200 and how much data of each logic channel to place.

[0058] Referring to FIG. 1 and FIG. 3, FIG. 3 is a flow chart of a method for transmitting an on-demand system information block according to an embodiment of the present application. The method can be performed by the user equipment 10, comprising the following steps:

[0059] Step S300: receiving a configuration message, wherein the configuration message comprises parameters for transmitting a first signal and / or parameters for receiving an on-demand system information block 1 SIB1.

[0060] Step S301: measuring a plurality of synchronization signal blocks SSBs and selecting one SSB.

[0061] Step S302: determining a PRACH occasion according to an index of the selected SSB. The PRACH occasion is used for transmitting the first signal.

[0062] Step S304: transmitting the first signal according to the configuration message, wherein the first signal is used for requesting the on-demand system information block SIB1 from the base station. The first signal can also be referred to as a UL wake-up signal (WUS).

[0063] Step S306: receiving an acknowledgement signal of the first signal (i.e. an acknowledgement signal corresponding to the first signal).

[0064] Step S308: monitoring a PDCCH of the on-demand SIB1 and receiving the on-demand SIB1.

[0065] It is worth noting that the above steps can be executed in sequence or not in sequence, and in addition, only part of the steps can be executed instead of all the steps each time.

[0066] Please refer to FIG. 1, FIG. 3 and FIG. 4A-4C. FIG. 4A is an interaction diagram of the method for transmitting the on-demand system information block according to an embodiment of the present application. FIG. 4B is an interaction diagram of the method for transmitting the on-demand system information block according to another embodiment of the present application. FIG. 4C is an interaction diagram of the method for transmitting the on-demand system information block according to yet another embodiment of the present application. In step S300, the base station 200 sends a configuration message to the user equipment 10. The base station 200 can be the first base station 200a of the first cell A or the second base station 200b of the network energy saving (NES) cell. The first base station 200a of the first cell A periodically sends the SIB1, while the second base station 200b of the NES cell does not periodically send the SIB1, but can send the on-demand (OD) SIB1. The first base station 200a and the second base station 200b are used as network devices to schedule and allocate radio resources for the user equipment 10. In this article, the cell controlled by the second base station 200b sending the OD SIB1 is defined as the NES cell, but the specific name of the cell is not limited in the present application.

[0067] As shown in FIG. 4A, first, the user equipment 10 performs cell search to receive the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) to obtain the master information block (MIB). In the NR system, the PSS, the SSS and the physical broadcast channel (PBCH) are composed of continuous symbols, which are collectively referred to as the synchronization signal block (SSB).

[0068] The second base station 200b of the NES cell sends a configuration message to the user equipment 10 as an UL wake-up signal (WUS) configuration including parameters for the user equipment 10 to send a first signal WUS and / or parameters for receiving on-demand system information block 1 (SIB1), which is configured to acquire the SIB1 required in the MIB. In the NR system, the system information (SI) includes a master information block (MIB) and a plurality of system information blocks (SIBs). The MIB contains basic parameters required by the user equipment 10 when initially accessing the network and related parameters required to acquire the system information block 1 (SIB1). The SIB1 is a cell (or base station) specific SIB used to carry cell access and cell selection related parameters and other SIB time domain scheduling (e.g. SIB to SI message mapping, periodicity, SI window size) information. The configuration message of the embodiment can be carried in the MIB, SIB1 or other SIBs.

[0069] In other embodiments, as shown in FIGS. 4B and 4C, the first base station 200a of the first cell A sends a configuration message to the user equipment 10.

[0070] Referring to FIG. 5, FIG. 5 is a parameter relationship diagram of the configuration message according to an embodiment of the present application. The configuration message can include at least one parameter shown in FIG. 5.

[0071] Referring to FIG. 3, in step S301, the user equipment 10 measures a plurality of synchronization signal blocks SSBs and selects one SSB. The user equipment 10 can measure the reference signal received power (RSRP) of a plurality of SSBs and select an SSB with a better RSRP therefrom. In step S302, the user equipment 10 determines the occasion of the physical random access channel (PRACH) according to the index of the selected SSB. The correspondence between the PRACH occasion (RO) and the SSB can be one-to-many (one RO associated with multiple SSBs), one-to-one (one RO corresponding to one SSB), or many-to-one (multiple ROs corresponding to one SSB). Because the user equipment 10 needs to determine the RO based on the selected SSB to send the PRACH, in order to ensure that each SSB can be associated with at least one valid RO, while avoiding the situation that after each SSB is associated with at least one valid RO, there are still remaining ROs without associable SSBs, the NR proposes an association period. One association period is a multiple of the PRACH configuration period. One association period starts from system frame 0, and its duration is an integer multiple of the PRACH configuration period, with a maximum of 160 ms. For a specific PRACH configuration period, if its corresponding association period can take multiple values, then the smallest association period that can make each SSB at least map to one PRACH occasion is taken.

[0072] In step S304, the user equipment 10 sends a first signal according to the configuration message, and the first signal is used to request the on-demand system information block SIB1 from the base station. The first signal is carried by the physical random access channel. When the PRACH occasion overlaps with a downlink symbol or a flexible symbol, the first signal can be sent on the downlink symbol or the flexible symbol.

[0073] In addition, if the cell of the base station contains two uplink carriers (i.e., a normal uplink (NUL) carrier and a supplementary uplink (SUL) carrier), the user equipment 10 can select one of the NUL and the SUL to send the first signal according to the RSRP of the measured SSB.

[0074] In step S306, when the base station 200b receives the first signal sent by the user equipment 10, the base station 200b sends an acknowledgement signal of the first signal to the user equipment 10.

[0075] In step S308, after the user equipment 10 receives the confirmation signal of the first signal, the user equipment 10 listens to the physical downlink control channel PDCCH of the on demand SIB1 in the listening time period of the PDCCH of the ODSIB1, and receives the on demand SIB1. In order to determine the listening time period (first time period) of the PDCCH of the ODSIB1, the starting position and the length of the listening time period of the PDCCH of the ODSIB1 need to be configured.

[0076] The prior art SIB1 occupies too many network resources by periodic transmission, and causes large power consumption of the base station. Compared with the prior art, the embodiment of the application provides a transmission method of an on demand system information block, receiving a configuration message, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or parameters for receiving an on demand system information block 1 SIB1; sending the first signal according to the configuration message, wherein the first signal is used to request the on demand system information block SIB1 from the base station; receiving a confirmation signal of the first signal; and listening to the physical downlink control channel PDCCH of the on demand SIB1, and receiving the on demand SIB1. By executing the scheme of the above embodiment, the base station no longer periodically sends the PDCCH and the SIB1 of the SIB1 to the user equipment, but negotiates the sending time period of the PDCCH and the SIB1 of the SIB1 with the user equipment, so that the power consumption of the base station can be saved, and the operator cost can be reduced.

[0077] Please refer to FIGS. 6-9, and FIG. 6 is a schematic diagram of the starting position of the time period of listening to the PDCCH of the ODSIB1 according to an embodiment of the application. Based on different reference points, the starting position of the first time period can be defined in different ways, and the following scheme 1-scheme 4 are specific.

[0078] Please refer to FIG. 6. In scheme 1, the first signal (PRACH requesting the ODSIB1) is taken as the reference point of the first time period. The starting position of the first time period is determined according to a first offset, that is, the user equipment 10 listens to the PDCCH of the ODSIB1 in the first time unit after the first offset after the last time unit of the first signal.

[0079] Optionally, the first offset can be a sum of an interval T1 between a last time unit of the first signal and a starting time unit of a random access response time window (RAR window), the RAR window, and an interval T2 of a starting time unit of the first time period relative to an ending time unit of the RAR window. T1 can refer to a time interval of the RAR window relative to the PRACH in the existing protocol, and T2 can be an interval of the starting time unit of the first time period relative to the ending time unit of the RAR window. T1 is greater than or equal to a length of one symbol. T2 is related to a PDSCH processing time N1 and a PDSCH processing capability of the user equipment, considering that the user equipment can receive the RAR at a position where the RAR window ends.

[0080] Optionally, the first offset can be a sum of an interval between a last time unit of the first signal and a first symbol of a PDCCH of the RAR, a number of symbols of the PDCCH of the RAR, an offset K0 between the PDCCH of the RAR and the RAR (indicating an offset between the PDCCH of the RAR and the RAR, indicated by the PDCCH of the RAR), a number of symbols of the RAR, and an interval T3 of a starting time unit of the first time period relative to a last time unit of the RAR. T3 is related to a PDSCH processing time N1 and a PDSCH processing capability of the user equipment.

[0081] Referring to FIG. 10 and FIG. 11, FIG. 10 is a parameter relationship diagram of a PDSCH processing capability 1 of a user equipment according to an embodiment of the present application. FIG. 11 is a parameter relationship diagram of a PDSCH processing capability 2 of a user equipment according to an embodiment of the present application. T3 (or T2) can be a value of N1 in the PDSCH processing capability 1 or the PDSCH processing capability 2. μ is a value of a parameter of a SCS of the first signal, or a parameter of a SCS of a PDCCH of the RAR, or a parameter of a SCS of a PDSCH of the RAR, or a parameter of a SCS of an ODSIB1, or a parameter of a SCS of an SSB, or a parameter of a minimum SCS of at least two of the above signals. Assuming that μ = 0 (i.e., the SCS is 15 kHz), T3 (or T2) can be a value of the PDSCH processing capability 1, and then T3 (or T2) can be 8 or N 1,0 . The base station 200 and / or the user equipment 10 can determine whether T3 (or T2) is 8 or N 1,0 .

[0082] Optionally, the first offset is a sum of an interval between a last time unit of the first signal and a first symbol of a PDCCH of the RAR, a number of symbols of the PDCCH of the RAR, and an interval T4 of a starting time unit of the first time period relative to a last time unit of the PDCCH of the RAR. T4 is related to K0 (an offset between the PDCCH of the RAR and the RAR, indicated by the PDCCH of the RAR), the number of symbols of the RAR, and a PDSCH processing time N1.

[0083] On the basis of the above-defined first offset, the first offset can further increase by an adjustment value (delta), wherein the adjustment value is greater than or equal to 0.

[0084] The first offset can be pre-defined by a protocol or indicated by a base station. If indicated by the base station, the first offset configured by the base station needs to be greater than or equal to the above-defined first offset.

[0085] Referring to FIG. 7, FIG. 7 illustrates a diagram of a starting position of a time period of listening to a PDCCH of an ODSIB1 according to another embodiment of the present application. In Scheme 2, a random access response (RAR) is taken as a reference point of the first time period. The starting position of the first time period is a first time unit after a last time unit of receiving the confirmation signal by the user equipment, after a second offset. The second offset conforms to an interval T3 of a starting time unit of the first time period relative to a last time unit of the RAR. T3 is related to a PDSCH processing time N1 and a PDSCH processing capability of the user equipment.

[0086] Referring to FIG. 10 and FIG. 11. T3 can be a value of N1 in PDSCH processing capability 1 or PDSCH processing capability 2. μ is a parameter of SCS of the first signal, or a parameter of SCS of the RAR PDCCH, or a parameter of SCS of the PDSCH of the RAR, or a parameter of SCS of the PDCCH of the ODSIB1, or a parameter of SCS of the SSB, or a parameter of minimum SCS of at least two of the above signals. Assuming μ = 0 (i.e. SCS is 15 kHz) as an example, if T3 is a value of PDSCH processing capability 1, then T3 can be 8 or N 1,0 . The base station 200 and / or the user equipment 10 can determine whether T3 is 8 or N 1,0 .

[0087] On the basis of the above-defined second offset, the second offset can further increase by an adjustment value (delta), wherein the adjustment value is greater than or equal to 0.

[0088] The second offset can be predefined by a protocol or indicated by a base station. If indicated by a base station, the second offset configured by the base station needs to be greater than or equal to the second offset defined by the existing protocol.

[0089] Referring to FIG. 8, FIG. 8 shows a diagram of a starting position of a time period of monitoring a PDCCH of an ODSIB1 according to another embodiment of the present application. In scheme 3, a RAR time window is used as a reference point of the first time period. The starting position of the first time period is the first time unit after the ending time unit of the RAR time window and after a third offset, and the third offset is consistent with an interval T2 of the starting time unit of the first time period relative to the ending time unit of the RAR time window. T2 is related to a PDSCH processing time N1 and a PDSCH processing capability of a user equipment.

[0090] Referring to FIG. 10 and FIG. 11. T3 can be a value of N1 in PDSCH processing capability 1 or PDSCH processing capability 2. μ is a parameter of a SCS of the first signal, or a SCS of a RAR PDCCH, or a SCS of a PDSCH of a RAR, or a SCS of a PDCCH of an ODSIB1, or a SCS of an SSB, or a parameter of a minimum SCS of at least two of the above signals. Assuming μ = 0 (i.e. SCS is 15 kHz), T2 can be a value of PDSCH processing capability 1, and then T2 can be 8 or N 1,0 . The base station 200 and / or the user equipment 10 can determine whether T2 is 8 or N 1,0 .

[0091] Based on the above definition of the third offset, the third offset can also be increased by a delta, and the delta is greater than or equal to 0.

[0092] The third offset can be predefined by a protocol or indicated by a base station. If indicated by a base station, the third offset configured by the base station needs to be greater than or equal to the third offset defined by the existing protocol.

[0093] Please refer to FIG. 9, which shows a diagram of the starting position of the time period of monitoring the PDCCH of the ODSIB1 according to another embodiment of the present application. In scheme 4, the user equipment 10 receives the PDCCH at the PDCCH monitoring occasion, and the base station 200b also needs to send the PDCCH at the PDCCH monitoring occasion. Therefore, the base station 200b sends the PDCCH of the ODSIB1 in the first time period, which means that the PDCCH of the ODSIB1 is sent at the PDCCH monitoring occasion in the first time period. The user equipment 10 monitors the PDCCH of the ODSIB1 in a period of time, which means that the PDCCH of the ODSIB1 is monitored at the PDCCH monitoring occasion in the first time period. The PDCCH monitoring occasion of the PDCCH of the ODSIB1 is related to the SSB, CORESET0 and SS set 0. The CORESET0 and / or SS set 0 can be configured by the MIB or SIB1.

[0094] The MIB includes a parameter systemFrameNumber for indicating the system frame number, a parameter subCarrierSpacingCommon for indicating the subcarrier spacing of SIB1, Msg 2, MSG4, MsgB, paging, a parameter ssb-SubcarrierOffset for indicating the offset between the subcarrier 0 of the SSB and the subcarrier 0 of the CRB A parameter dmrs-TypeA-Position for indicating the position of the demodulation reference signal (DMRS), a pdcch-ConfigSIB1 for configuring the control resource set (CORESET) and the search space set (SS set), a parameter cellBarred for indicating whether the cell is prohibited, a parameter intraFreqReselection for indicating whether the selection of the same frequency cell is allowed during the cell selection or reselection, and a spare parameter.

[0095] The pdcch-ConfigSIB1 parameter includes ControlResourceSetZero and SearchSpaceZero parameters. The ControlResourceSetZero parameter is a control resource set (CORESET) with ID 0, which is referred to as CORESET0 hereinafter. The SearchSpaceZero parameter is a search space set (SS set) with ID 0, which is referred to as SS set 0 hereinafter.

[0096] The user equipment 10 determines the monitoring occasion of the physical downlink control channel (PDCCH) of the SIB1 according to the ControlResourceSetZero and the SearchSpaceZero. The PDCCH of the SIB1 refers to the PDCCH corresponding to the SIB1.

[0097] Then, the user equipment 10 receives the PDCCH of the SIB1 and the PDSCH according to the scheduling information of the PDCCH, the PDSCH carrying the SIB1. The user equipment 10 determines the time-frequency domain position of the PDCCH of the SIB1 according to the above-mentioned parameters, and monitors the PDCCH. Since the SIB1 is transmitted through the PDSCH, in order to receive / decode the SIB1, the scheduling information of the PDSCH needs to be known, so the user equipment 10 needs to monitor the PDCCH (i.e. the PDCCH of the SIB1) carrying the scheduling information first. In this paper, the PDCCH of the SIB1 is also called type0 PDCCH, the downlink control information (DCI) carried by the PDCCH of the SIB1 is scrambled by the system message-radio network temporary identity (SI-RNTI), so it can also be called SI-RNTI scrambled DCI, and the search resource set 0 (SS set 0) can also be called type0 PDCCH CSS (common search space) set.

[0098] Regarding the monitoring occasion of the CORESET0, the SS set0 and the SIB1 PDCCH, the control resource set (CORESET) is a time-frequency resource block used for transmitting the PDCCH, which is composed of 1-3 symbol groups in the time domain and Resource blocks (RBs) in the frequency domain. The time-frequency resources of the CORESET0 can refer to Tables 13-0-13-10, Table 13-1A, Table 13-4A and Table 13-10A of the protocol TS38.213, and the corresponding table can be used according to different scenarios.

[0099] Table 1

[0100] For example, Table 1 is Table 13-0 of TS 38.213. CORESET0 can occupy 2 or 3 symbols in time domain and 12 or 24 RBs in frequency domain. According to the index value indicated by ControlResourceSetZero parameter, the table can be looked up to determine how many time-frequency resources are used by CORESET0. For example, if the index value indicated by ControlResourceSetZero parameter is 0, CORESET0 is composed of 2 symbols and 12 RBs. According to the table and the index value indicated by ControlResourceSetZero, the multiplexing manner of CORESET0 and SSB (the second column of the table) and the frequency domain offset of CORESET0 relative to SSB (the last column of the table) can also be determined.

[0101] Please refer to FIG. 12, which shows a schematic diagram of three multiplexing patterns (SS / PBCH block and CORESET multiplexing pattern) between SSB and CORESET0. In pattern 1, SSB and CORESET0 are time-division multiplexed, and in pattern 2 and pattern 3, SSB and CORESET0 are frequency-division multiplexed.

[0102] CORESET defines the size of time-frequency resource block carrying PDCCH, and CORESET indicates those time domain symbols that need to be searched for space set configuration. Search resource set 0 (SS set 0) is used to determine the monitoring occasion of type0 PDCCH (i.e. the PDCCH of SIB1) (which can also be understood as used to determine the time domain position of CORESET0). TS 38.213 defines search resource set 0 (SS set 0) in Tables 13-11 to 13-15A, and different tables can be used according to different scenarios. According to the parameters in the table, base station 200b and user equipment 10 can calculate the time domain position of CORESET0. The following describes an example in which the multiplexing pattern of SSB and COREST0 is pattern 1.

[0103] In the case where the multiplexing pattern of SSB and COREST0 is pattern 1 (SSB and CORESET0 are time-division multiplexed), user equipment 10 monitors PDCCH in two time slots. For example, if the subcarrier spacing is 15 kHz, user equipment 10 monitors type0 PDCCH in time slots n0 and n0+1. User equipment 10 determines the monitoring occasion of type0 PDCCH (the time domain position of CORESET0) in the following manner.

[0104] User equipment 10 determines SSB index i. According to SSB index i, user equipment determines time slot n0, where μ is a parameter of subcarrier (subcarrier spacing is 15*2μ KHz), denotes the number of slots contained in a frame with subcarrier spacing corresponding to μ, O and M are determined by protocol 38.213 Tables 13-11~13-15A, and mod denotes the modulo calculation. Taking protocol 38.213 Table 13-11 as an example, according to the index i indicated by the parameter SearchSpaceZero, the parameters O and M can be determined, and the slot n0 can be calculated.

[0105] If the frame where the slot n0 is located satisfies SFN c mod2 = 0, where SFN C is the system frame number.

[0106] If the frame where the slot n0 is located satisfies SFN C mod2 = 1.

[0107] After determining the slot of the type0 PDCCH through the above formula, the user equipment 10 also needs to determine which symbols of the slot the type0 PDCCH is in.

[0108] Referring to Table 2, which is Table 13-11 of TS 38.213, the index of the first symbol indicates the first symbol position of CORESET0 in two slots (slot n0 and n0+1 obtained by the above formula).

[0109] Table 2

[0110] Please refer to FIG. 13, which shows a schematic diagram of the time domain position of the PDCCH of SIB1 under mode 1 of SSB and COREST0 multiplexing. Taking SCS = 15 kHz (μ = 0) and the multiplexing mode of SSB and COREST0 as mode 1 as an example, based on the above calculation method, the time domain position of the PDCCH of SIB1 (the position of CORESET0) can be as follows, where the CORESET0 corresponding to SSB0 is located in slot 0 and slot 1, the CORESET0 corresponding to SSB1 is located in slot 1 and slot 2, the CORESET0 corresponding to SSB2 is located in slot 2 and slot 3, and the CORESET0 corresponding to SSB3 is located in slot 3 and slot 4. According to the SSB index, the user equipment listens to the type0 PDCCH in the PDCCH listening occasion in FIG. 13.

[0111] Therefore, the starting position of the first time period is also related to the SSB, CORESET0 and SS set0. For example, the starting position of the first time period is the first time unit (e.g., symbol) of the earliest CORESET0 after satisfying the above-mentioned offset. For another example, the starting position of the first time period is the Xth time unit after satisfying the above-mentioned offset, X is greater than or equal to 0, for example, the Xth time unit is the starting time unit of the CORESET0 determined by the SSB index i. The SSB index i can be an index corresponding to the SSB associated with the first signal.

[0112] In scheme 4, multiple user equipment 10 transmits the first signal on different ROs. The different ROs can be located in different time and / or frequency domain resources, and the multiple user equipment 10 can receive the PDCCH of the ODSIB1 in the same first time period. As shown in FIG. 9, multiple user equipment (e.g., UE1 and UE2) transmits the first signal at different times, but can receive the PDCCH of the ODSIB1 in the same first time period. The multiple user equipment can be from the same NES cell. The multiple user equipment can be from different NES cells. In addition, the time domain positions of the first signals of the multiple user equipment are relatively close, and the time domain positions of the first signals of the multiple user equipment are within a time period (e.g., the time domain positions of the first signals of the multiple user equipment are within the same PRACH period or within the same association period, or the interval between the time domain positions of the first signals of the multiple user equipment does not exceed a threshold).

[0113] According to an embodiment of the present application, the duration of the time period (the first time period) for monitoring the PDCCH of the ODSIB1 can be protocol predefined or indicated by the base station, for example, through the MIB, SIB (e.g., SIB1), RAR, PDCCH of RAR, or the first signal.

[0114] The duration of the first time period can be a half frame containing X SSB periods or X SSB burst sets, or the first time period contains Y PDCCH (PDCCH of ODSIB1) monitoring occasions. For example, X SSB burst sets correspond to Y PDCCH monitoring occasions, or the index i of the SSB corresponds to Y PDCCH monitoring occasions, where X and Y are positive integers. A SSB burst set is composed of one or more SSBs, and each SSB can be transmitted on a different beam.

[0115] In case the user equipment 10 requests the ODSIB1 for initiating a random access procedure to establish an RRC connected state, the end position of the first time period can also be defined. For example, the end position of the first time period is the time unit when the user equipment 10 transmits a PRACH again after receiving the RAR or the time unit when the time unit of the time when the user equipment transmits the PRACH again after receiving the RAR passes. The PRACH transmitted again is used to request to establish an RRC connected state.

[0116] The base station 200b transmits the PDCCH of the ODSIB1 in each available listening occasion in the first time period, or the base station 200b transmits the PDCCH of the ODSIB1 in part of the listening occasions in the first time period, for example, the base station 200b transmits the PDCCH of the ODSIB1 in the PDCCH listening time determined by the SSB index i, which can be the index corresponding to the SSB associated with the first signal.

[0117] In the first time period, the user equipment does not need to listen to the PDCCH in each PDCCH listening occasion. The PDCCH listening occasion is related to the SSB index, and the user equipment listens to the PDCCH in the PDCCH listening time corresponding to the selected SSB index.

[0118] In order to prevent the user equipment 10 from missing the PDCCH of the ODSIB1, the base station 200b can repeatedly transmit the PDCCH of the ODSIB1 in the PDCCH listening occasion corresponding to the SSB index i. The user equipment 10 can listen to the PDCCH of the ODSIB1 in at least one of these PDCCH listening times. The first time window can contain multiple PDCCH listening occasions corresponding to the SSB index i.

[0119] If the user equipment 10 does not correctly receive the PDCCH of the ODSIB1 or the ODSIB1 in the first time period, the user equipment 10 can send the first signal again after the first time period, to request the ODSIB1 from the base station 200b. At this time, the PREAMBLE_TRANSMISSION_COUNTER (indicating the number of times of transmission of the first signal), and / or, the PREAMBLE_POWER_RAMPING_COUNTER (indicating the number of times of power ramping of the first signal) can be set to 1, and / or, the PREAMBLE_BACKOFF (indicating the backoff indication of the first signal) is set to 0. Alternatively, the PREAMBLE_TRANSMISSION_COUNTER, and / or, the PREAMBLE_POWER_RAMPING_COUNTER are incremented by 1. Since the first signal is sent through MSG1, the user equipment 10 can use the PREAMBLE_TRANSMISSION_COUNTER and the PREAMBLE_POWER_RAMPING_COUNTER to record the number of times of sending the first signal, and the number of times of power ramping.

[0120] In order to improve the reliability of the first signal, i.e. to improve the probability of the base station 200b correctly receiving the first signal, the embodiment proposes that the configuration message further includes the configuration of the number of repetitions of the first signal or the thresholds (e.g. the RSRP thresholds) corresponding to different numbers of repetitions.

[0121] Alternatively, in an embodiment of the present application, the number of repetitions of the first signal can be configured by the MIB sent by the base station 200b of the NES cell. In the case shown in FIG. 4B and FIG. 4C, the number of repetitions of the first signal can be configured by the system message sent by the base station 200a of the first cell. The configuration message can configure one or more numbers of repetitions and / or threshold values corresponding to the numbers of repetitions, wherein the threshold values corresponding to the numbers of repetitions can be RSRP thresholds. The user equipment 10 measures the RSRP based on the SSB, compares it with the RSRP threshold, and determines the corresponding number of repetitions.

[0122] Alternatively, in an embodiment of the present application, the base station 200b (or 200a) configures or updates the number of repetitions of the first signal or the thresholds corresponding to different numbers of repetitions in the ODSIB1, so that the user equipment 10 can use it when requesting the ODSIB1 next time.

[0123] Alternatively, in an embodiment of the present application, before obtaining the number of repetitions of the first signal or the threshold, the user equipment 10 sends the first signal using a predefined number of repetitions.

[0124] Optionally, in an embodiment of the present application, the repetition number or threshold of the first signal in the case shown in FIG. 4C adopts the repetition number or threshold configured in the existing protocol.

[0125] Referring to FIG. 4A and FIG. 4C, in an embodiment, the user equipment 10 determines the target base station of the cell sending the first signal according to the source of the configuration message. For example, when the configuration message received by the user equipment 10 is from the base station 200b of the NES cell, the user equipment 10 sends the first signal to the base station 200b of the NES cell. When the configuration message received by the user equipment 10 is from the base station 200a of the first cell A, the user equipment 10 sends the first signal to the base station 200a of the first cell A.

[0126] In another embodiment, referring to FIG. 4A-FIG. 4C, the user equipment 10 determines the target base station of the cell sending the first signal according to the indication information of the configuration message after receiving the configuration message. The indication information of the configuration message can be 1 bit. For example, when the indication information is a first value (e.g., true), the user equipment 10 sends the first signal on the first cell A; when the second indication is a second value (e.g., false), the user equipment 10 sends the first signal on the NES cell. Alternatively, when the configuration message has the indication information, the user equipment 10 sends the first signal to the base station 200a of the first cell A; when the configuration message does not have the indication information, the user equipment 10 sends the first signal to the base station 200b of the NES cell, and vice versa.

[0127] In another embodiment, the base station 200b (or 200a) can indicate in the OD SIB1 that the user equipment sends the first signal to the base station 200a of the first cell A or to the base station 200b of the NES cell next time. Before the user equipment 10 receives the OD SIB1, the user equipment 10 can determine the target base station sending the first signal based on the source of the configuration message or the indication of the configuration message or based on a predefined manner.

[0128] In addition, the user equipment 10 can receive the OD SIB1 on the cell sending the first signal. Alternatively, the base station 200b (or 200a) can indicate in the RAR which cell the user equipment 10 receives the OD SIB1.

[0129] Referring to FIG. 4C, when multiple user equipment 10 sends the first signal to the base station 200a of the first cell A, the base station 200a needs to distinguish which NES cell the different first signals correspond to.

[0130] Referring to FIG. 5, according to an embodiment of the present application, the base station 200a can distinguish which NES cell a first signal corresponds to by the resource of the first signal. The resource includes the time domain, the frequency domain, and the period of the first signal. The configuration message can configure different parameters, such as rach-OccasionsSIB1, Prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, sib1-RequestPeriod, ra-AssociationPeriodIndex, and / or ra-ssb-OccasionMaskIndex, for different NES cells. Therefore, the identification ID (Cell ID) of each different NES cell can be associated with at least one of the parameters.

[0131] In another embodiment, the base station 200a can further divide the resource indicated by the parameters, such as rach-OccasionsSIB1, Prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, sib1-RequestPeriod, ra-AssociationPeriodIndex, and / or ra-ssb-OccasionMaskIndex, into multiple subsets for different NES cells. The identification ID (Cell ID) of each different NES cell can be associated with the subsets.

[0132] The resource of the first signal indicated above is the resource of the first cell A. In the above manner, different NES cells can be associated with different resources of the first signal.

[0133] In another embodiment, the user equipment 10 can directly send the first signal on the resource of the first signal associated with the NES cell to which the user equipment 10 belongs. Accordingly, the base station 200a can determine which NES cell the user equipment 10 belongs to according to the resource of the received first signal.

[0134] According to an embodiment of the present application, the base station 200a can distinguish which NES cell a first signal corresponds to by a preamble sequence of the first signal. The preamble sequence of the first signal includes an index of a preamble, a cyclic shift, or a root sequence. The configuration message can configure different zeroCorrelationZoneConfig, ra-PreambleStartIndex, prach-RootSequenceIndex, and / or restrictedSetConfig corresponding to different NES cells. Thus, the identification ID (Cell ID) of each different NES cell can be associated with at least one of the parameters.

[0135] In another embodiment, the base station 200a can divide a plurality of preamble sequences determined by the parameters of zeroCorrelationZoneConfig, ra-PreambleStartIndex, prach-RootSequenceIndex, and / or restrictedSetConfig into a plurality of subsets corresponding to different NES cells. The identification ID (Cell ID) of each different NES cell can be associated with the subsets.

[0136] In another embodiment, a parameter can be added in the preamble sequence of the first signal, which is used to indicate the identification ID of different NES cells.

[0137] In this way, different NES cells can be associated with different preamble sequences.

[0138] In another embodiment, the user equipment 10 can select the preamble sequence associated with the NES cell to which the user equipment belongs according to the NES cell to which the user equipment belongs and send it to the base station 200a. Accordingly, the base station 200a can determine which NES cell the user equipment 10 belongs to according to the preamble sequence of the received first signal.

[0139] Referring to FIG. 5, according to an embodiment of the present application, the base station 200a can distinguish the purposes of different OD SIB1s through the resources of the first signal. The purposes of the OD SIB1s mainly include two kinds: (a) the user equipment camps on the NES cell, and (b) the user equipment initiates a random access procedure to establish an RRC connection state. Corresponding to the different purposes of the OD SIB1s, the configuration message configures different parameters such as rach-OccasionsSIB1, Prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, sib1-RequestPeriod, ra-AssociationPeriodIndex, and / or ra-ssb-OccasionMaskIndex. Therefore, the purposes of different OD SIB1s can be associated with at least one of the parameters.

[0140] In another embodiment, corresponding to different NES cells, the base station 200a can further divide the resources indicated by the parameters such as rach-OccasionsSIB1, Prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, sib1-RequestPeriod, ra-AssociationPeriodIndex, and / or ra-ssb-OccasionMaskIndex into multiple subsets, and each subset corresponds to a different purpose of the OD SIB1. The purposes of different OD SIB1s can be associated with the subsets.

[0141] The resources of the first signal indicated above are the resources of the first cell A. In the above manner, the purposes of different OD SIB1s can be associated with different resources of the first signal.

[0142] In another embodiment, the user equipment 10 can directly send the first signal on the resources of the first signal associated with the NES cell. Correspondingly, the base station 200a can determine the purpose of the OD SIB1 requested by the user equipment 10 sending the first signal according to the resources of the first signal received.

[0143] According to an embodiment of the present application, the base station 200a can distinguish which NES cell a first signal corresponds to by a preamble sequence of the first signal. The preamble sequence of the first signal includes an index of the preamble, a cyclic shift or a root sequence. The configuration message can configure different zeroCorrelationZoneConfig, ra-PreambleStartIndex, prach-RootSequenceIndex and / or restrictedSetConfig for different NES cells. Thus, the purpose of each different OD SIB1 can be associated with at least one of the parameters.

[0144] In another embodiment, the base station 200a can further divide the resources indicated by the parameters of rach-OccasionsSIB1, Prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, sib1-RequestPeriod, ra-AssociationPeriodIndex and / or ra-ssb-OccasionMaskIndex into multiple subsets for different NES cells, each subset corresponding to the purpose of a different OD SIB1. The purpose of different OD SIB1 can be associated with the subsets.

[0145] In another embodiment, a parameter can be added in the preamble sequence of the first signal, which is used to indicate the purpose of different OD SIB1.

[0146] In this way, the purpose of different OD SIB1 can be associated with different preamble sequences.

[0147] In another embodiment, the user equipment 10 can select the preamble sequence associated with the NES cell to which the user equipment belongs according to the purpose of the OD SIB1 it requests and send it to the base station 200a. Accordingly, the base station 200a can determine the purpose of the OD SIB1 requested by the user equipment 10 according to the received preamble sequence of the first signal.

[0148] Referring to FIG. 14, FIG. 14 is a schematic diagram of the MAC PDU structure according to an embodiment of the present application. In an embodiment, a subPDU is added in the MAC PDU, which is used to indicate the index of the SS set0 and / or the index of the CORESET0.

[0149] Referring to FIG. 15, FIG. 15 is a schematic diagram of a MAC RAR structure according to an embodiment of the present application. In one embodiment, two new fields are added in the MAC RAR to indicate the index of SS set0 and / or the index of CORESET0.

[0150] Referring to FIG. 16, FIG. 16 is a schematic diagram of a UL grant field structure according to an embodiment of the present application. In another embodiment, part of the original UL grant field in the MAC RAR is used to indicate SS set0 and / or CORESET0. Since the MAC RAR does not need to schedule MSG3, part of the UL grant field can be multiplexed to indicate SS set0 and / or CORESET0. The field of the UL grant in the MAC RAR is shown in FIG. 16, which can use the fields of Frequency hopping flag, PUSCH frequency resource allocation, PUSCH time resource allocation, MCS, TPC command for PUSCH, or CSI request to indicate SS set0 and / or CORESET0. For example, the PUSCH time resource allocation field is used to indicate the index of SS set0.

[0151] In another embodiment, SS set0 and CORESET0 can also be indicated in different ways, for example, the subPDU of FIG. 15 is used to indicate the index of SS set0, and the UL grant field of the MAC RAR of FIG. 16 is used to indicate the index of CORESET0; or the subPDU of FIG. 15 is used to indicate the index of CORESET0, and the UL grant field of the MAC RAR of FIG. 16 is used to indicate the index of SS set0.

[0152] In another embodiment, the subPDU of FIG. 15 or the UL grant field of the MAC RAR of FIG. 16 can be used to indicate the index of SS set0, and the configuration message carried in the MIB or SIB1 is used to indicate the index of CORESET0; or the subPDU of FIG. 15 or the UL grant field of the MAC RAR of FIG. 16 can be used to indicate the index of CORESET0, and the configuration message carried in the MIB or SIB1 is used to indicate the index of SS set0.

[0153] Please refer to FIG. 5. When the base station 200a of the first cell A or the base station 200b of the NES cell can configure the configuration message of multiple NES cells, in order to save the overhead of the configuration signaling, and considering the limitation of the PRACH resource and the number of preamble sequences, the base station 200a or the base station 200b should define the maximum number M of the NES cells. In this way, the number of cell IDs indicated by the PhysCellId parameter of the configuration message shown in FIG. 5 should be less than or equal to M.

[0154] In addition, in order to save the overhead of the configuration signaling, at least one of the following parameters in the configuration message used by multiple cells in the same band or multiple cells in the same frequency range (FR1 / FR2) can be common: the energy parameter ss-PBCH-BlockPower of each resource element in the secondary synchronization signal SSS, the PRACH target received power parameter preambleReceivedTargetPower, the maximum number of PRACH transmissions parameter preambleTransMax, the power ramping step parameter powerRampingStep, the RAR time window parameter ra-ResponseWindow, the parameter ssb-perRACH-Occasion that sets the mapping relationship of SSB and RO, the parameter msg1-SubcarrierSpacing that sets the subcarrier spacing of PRACH, the parameter restrictedSetConfig that determines the cyclic shift of the preamble sequence, or the maximum allowed transmit power parameter p-Max.

[0155] Please refer to FIG. 17 and FIG. 18. FIG. 17 shows the interaction diagram of the method for transmitting the on-demand system information block according to another embodiment of the present application. FIG. 18 shows the diagram of the paging occasion and the PEI occasion during the reception of the ODSIB1 according to the embodiment of the present application. As described above, the user equipment 10 requests the ODSIB1 (i.e., the user equipment 10 sends the first signal) can have two purposes: the user equipment 10 will camp on the NES cell, or the user equipment 10 will initiate the random access procedure on the NES cell to establish the RRC connection state. When the user equipment 10 camps on the NES cell, the user equipment 10 will perform at least one of the following behaviors: receiving the paging channel, receiving the paging DCI (DCI scrambled by the paging-RNTI (P-RNTI)), receiving the system message, or performing the cell reselection related operations, such as the cell reselection related measurement and evaluation. When the user equipment 10 wants to establish the RRC connection state, the user equipment 10 will initiate the random access procedure.

[0156] Paging is a key procedure to connect the network and the user equipment. The base station sends paging messages to the user equipment in idle state or inactive state, or sends system message change and major disaster warning (e.g. Earthquake and Tsunami Warning System (ETWS), Commercial Mobile Alerting System (CMAS)) to the user equipment in idle state, inactive state or connected state. The paging DCI is scrambled by P-RNTI, and the Short Messages Indicator field and the Short Messages field in the paging DCI are used to indicate the paging action.

[0157] Since the PRACH period and the paging period are configured independently, there can be a paging occasion (PO) during the third period from the time when the user equipment 10 sends the first signal to the time when the user equipment 10 receives the ODSIB1, or during the fourth period from the time when the user equipment 10 sends the first signal to the end of the ODSIB1 time window (i.e. the first time window). If the user equipment 10 also supports the paging early indication (PEI) function, there can also be a PEI occasion. The base station 200b (or 200a) can send the paging DCI on the PO and send the PEI on the PEI occasion. However, the behavior of the paging DCI and the PEI needs to be redefined during the time when the user equipment 10 requests the ODSIB1.

[0158] According to an embodiment of the present application, during the third period from the time when the user equipment 10 sends the first signal to the time when the user equipment 10 receives the ODSIB1, or during the fourth period from the time when the user equipment 10 sends the first signal to the end of the ODSIB1 time window (i.e. the first time window), the user equipment 10 listens to the paging DCI on the PO. When the paging DCI indicates system message change, the user equipment 10 listens to the PDCCH scrambled by SI-RNTI in the modification period. At this time, the user equipment 10 can ignore the first time window, i.e. the user equipment 10 does not need to listen to the PDCCH scrambled by SI-RNTI according to the first time window. If the base station and the user equipment 10 also support the PEI function, the user equipment 10 can listen to the PEI on the PEI occasion during the third period or the fourth period.

[0159] According to an embodiment of the present application, the user equipment 10 can monitor the paging DCI in the PO. The user equipment 10 can monitor the PDCCH scrambled by SI-RNTI according to the first time window. At this time, the base station 200b can not indicate the system message change by the paging DCI in the third period or the fourth period. If the base station and the user equipment 10 also support the PEI function, the user equipment 10 can monitor the PEI in the PEI occasion in the third period or the fourth period.

[0160] According to an embodiment of the present application, the user equipment 10 does not need to monitor the paging DCI in the third period or the fourth period. If the base station and the user equipment 10 also support the PEI function, the user equipment 10 does not need to monitor the PEI in the PEI occasion in the third period or the fourth period. The user equipment 10 can not have its own PO in the third period or the fourth period.

[0161] According to an embodiment of the present application, the RAR indicates whether the user equipment 10 needs to monitor the paging DCI before receiving the ODSIB1.

[0162] According to an embodiment of the present application, the behavior of the user equipment 10 monitoring the paging DCI can be different before the user equipment 10 receives the RAR and after the user equipment 10 receives the RAR. For example, the user equipment 10 can monitor the paging DCI in the PO before the user equipment 10 receives the RAR, and can decide whether to monitor the paging DCI after the user equipment 10 receives the RAR.

[0163] Referring to FIG. 19, FIG. 19 shows a diagram of the period of receiving the ODSIB1 and the modification period according to an embodiment of the present application. After the base station 200b sends the paging DCI, since the paging DCI indicates the system message change, the base station 200b sends the system message in the modification period after the paging DCI.

[0164] According to an embodiment of the present application, in the fifth period between the user equipment 10 receiving the paging DCI and the user equipment 10 receiving the system message, or in the sixth period between the user equipment 10 receiving the paging DCI and the end of the modification period, the user equipment 10 can receive the system message in the modification period after sending the first signal. Meanwhile, the base station 200b and / or the user equipment 10 can ignore the first time window.

[0165] According to an embodiment of the present application, in the fifth period between the user equipment 10 receiving the paging DCI and the user equipment 10 receiving the system message, or in the sixth period between the user equipment 10 receiving the paging DCI and the end of the modification period, the user equipment 10 can not send the first information, and receive the system message in the modification period.

[0166] According to an embodiment of the present application, during the fifth period from when the user equipment 10 receives the paging DCI to when the user equipment 10 receives the system message, or during the sixth period from when the user equipment 10 receives the paging DCI to when the end of the correction period, the user equipment 10 receives the system message in the first time window after sending the first signal. Meanwhile, the base station 200b and / or the user equipment 10 can ignore the correction period.

[0167] According to an embodiment of the present application, during the fifth period from when the user equipment 10 receives the paging DCI to when the user equipment 10 receives the system message, or during the sixth period from when the user equipment 10 receives the paging DCI to when the end of the correction period, the user equipment 10 receives the system message in the correction period and / or the first time window after sending the first signal. Optionally, the user equipment 10 can stop monitoring the type0 PDCCH in the first time window when it receives the system message in the correction period. Similarly, the user equipment 10 can stop monitoring the type0 PDCCH in the correction period when it receives the system message in the first time window. Optionally, the user equipment 10 can receive the system message in the earlier time period of the correction period and the first time window.

[0168] The embodiment of the present application provides a transmission method of on-demand system information block, receiving a configuration message, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or parameters for the user equipment to receive an on-demand system information block 1 SIB1; sending the first signal according to the configuration message, wherein the first signal is used to request the base station for the on-demand system information block SIB1; receiving an acknowledgement signal of the first signal; and monitoring a physical downlink control channel PDCCH of the on-demand SIB1 and receiving the on-demand SIB1. By executing the above-mentioned embodiment, the base station no longer periodically sends the PDCCH and SIB1 of SIB1 to the user equipment, but negotiates with the user equipment the sending time period of the PDCCH and SIB1 of SIB1, so that the power consumption of the base station can be saved and the cost of the operator can be reduced.

[0169] According to an embodiment of the present application, when the user equipment 10 initiates a random access procedure, the random access procedure includes a contention based random access procedure (CBRA) and a contention free random access procedure (CFRA). The random access procedure can also be divided into a 4-step random access and a 2-step random access. For the contention based random access procedure CBRA, the user equipment 10 initiates the random access voluntarily. The user equipment 10 selects a preamble according to the parameters configured by the higher layer and sends MSG1 (4-step random access) or MSG A (2-step random access). There are 64 available preamble sequences in each cell, and the user equipment 10 selects one of them to send at the PRACH occasion. The preamble sequences can be divided into two parts: one part is used for CBRA and CFRA, and the other part is used for other purposes (e.g., SI request).

[0170] After the base station 200b receives the preamble sent by the user equipment 10, it sends MSG2. MSG2 includes the PDCCH of the random access response (RAR) and the RAR. The user equipment 10 receives the PDCCH of MSG 2 (4-step random access) or MSG B (2-step random access) within the RAR time window (i.e., the PDCCH scrambled by RA-RNTI or the PDCCH of the RAR), and further receives the RAR according to the scheduling information of the PDCCH of the RAR. The PDSCH scheduled by the PDCCH scrambled by RA-RNTI is used to carry the RAR.

[0171] For the 4-step random access, the starting time of the RAR time window is at least one symbol after the last symbol of the last PRACH occasion of the PRACH transmission, and the first symbol of the earliest CORESET used to listen to the type 1 PDCCH. The length of the RAR time window is configured by the higher layer parameter.

[0172] For the 2-step random access, the starting time of the RAR time window is at least one symbol after the last symbol of the PUSCH occasion of MSG A, and the first symbol of the earliest CORESET used to listen to the type 1 PDCCH. The length of the RAR time window is configured by the higher layer parameter.

[0173] The user equipment 10 sends MSG3 to the base station 200b through PUSCH based on the scheduling information carried in the RAR. The information of MSG3 includes the terminal identifier, such as the cell radio network temporary identifier (C-RNTI) or the core network terminal identifier.

[0174] The base station 200b sends MSG4 to the user equipment 10. If the user equipment 10 has been assigned a C-RNTI before receiving the MSG4, the contention resolution is by the base station 200b scheduling the user equipment 10 with a PDCCH scrambled with the C-RNTI. If the user equipment 10 has not been assigned a C-RNTI before receiving the MSG4, the contention resolution is by the base station scheduling the user equipment 10 with a PDCCH scrambled with a TC-RNTI (Temporary C-RNTI), the PDSCH scheduled by the PDCCH contains the message for contention resolution, correspondingly, the user equipment 10 can use the TC-RNTI as the C-RNTI. Wherein, MSG3 and MSG4 are used for contention resolution and RRC connection establishment.

[0175] The above flow is an example of a complete random access procedure. For CBRA, MSG2, MSG3, MSG4 can not occur, resulting in a failed random access.

[0176] CFRA is triggered by the base station 200 to initiate random access by the user equipment 10, the base station 200 will first assign a preamble to the user equipment 10, therefore, CFRA does not need to solve the problem of contention.

[0177] According to an example embodiment, a chip is provided, the chip comprising: a processor configured to invoke and run a computer program from a memory, so that a device installed with the chip performs the method according to any one of the above embodiments, examples, or example embodiments.

[0178] According to an example embodiment, a computer readable storage medium is provided for storing a computer program, the computer program causing a computer to perform the method according to any one of the above embodiments, examples, or example embodiments.

[0179] According to an example embodiment, a computer program product is provided, comprising computer programs / instructions which, when executed by a processor (for example, by the processor or a device, equipment, computer or machine comprising the processor, etc.), implement the method according to any one of the above embodiments, examples, or example embodiments.

[0180] Embodiments of the present application are combinations of techniques / processes that can be adopted in 3GPP specifications to create a final product.

[0181] While the application has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the application is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various arrangements included within the spirit and scope of the appended claims, which are to be accorded the broadest interpretation so as to encompass all equivalent combinations.

Claims

1. A method for transmission of on-demand system information block, the method is performed in a user equipment, comprising: receiving a configuration message, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or parameters for receiving an on-demand system information block (SIB1) ; sending a first signal according to the configuration message, the first signal is used to request the on-demand system information block (SIB1) from a base station; receiving an acknowledgement signal of the first signal; and monitoring a physical downlink control channel (PDCCH) of the on-demand SIB1 and receiving the on-demand SIB1. 2.The method of claim 1, wherein the first signal is carried by a physical random access channel (PRACH). 3.The method of claim 2, wherein before the step of sending a first signal according to the configuration message, the method further comprises: measuring a plurality of synchronization signal blocks (SSBs) and selecting one SSB; determining a time occasion of the physical random access channel (PRACH) according to an index of the selected SSB. 4.The method of claim 2, when the time occasion of the PRACH overlaps with a downlink symbol or a Flexible symbol, the first signal is sent on the downlink symbol or the Flexible symbol. 5.The method of claim 1, wherein the step of monitoring a physical downlink control channel (PDCCH) of the on-demand SIB1 comprises: determining a starting position and / or a time length of a first time period; monitoring the physical downlink control channel (PDCCH) of the on-demand SIB1 on a monitoring occasion of the PDCCH within the first time period. 6.The method of claim 5, wherein the starting position of the first time period is a first time unit after a last time unit of sending the first signal by the user equipment and after a first offset. 7.The method of claim 6, wherein the first offset is a sum of an interval T1 between the last time unit of the first signal and a starting time unit of a random access response (RAR) time window, a time length of the RAR time window, and an interval of a starting time unit of the first time period relative to an ending time unit of the RAR time window. 8.The method of claim 6, wherein the first offset is a sum of an interval between the last time unit of the first signal and a first symbol of a PDCCH of the RAR, a number of symbols of the PDCCH of the RAR, and an interval of a starting time unit of the first time period relative to a last time unit of the PDCCH of the RAR. 9.The method of claim 6, wherein the first offset is a sum of an interval between the last time unit of the first signal and a first symbol of a PDCCH of the RAR, a number of symbols of the PDCCH of the RAR, an offset K0 between the PDCCH of the RAR and the RAR, a number of symbols of the RAR, and an interval of a starting time unit of the first time period relative to a last time unit of the RAR. ​ ​ ​ ​ ​ ​ ​ ​ ​ 10.The method of claim 5, wherein the starting position of the first time period is the first time unit after a second offset from a last time unit that the user equipment receives the confirmation signal, and the second offset is consistent with an interval of a starting time unit of the first time period relative to a last time unit of the RAR. 11.The method of claim 5, wherein the starting position of the first time period is the first time unit after a third offset from an ending time unit of a random access response time window, and the third offset is consistent with an interval of a starting time unit of the first time period relative to an ending time unit of the RAR time window. 12.The method of any one of claims 7-11, wherein the first offset, the second offset, and the third offset further comprise an adjustment value. 13.The method of any one of claims 7-11, wherein the starting position of the first time period is a first time unit of a control resource set 0 (CORESET0), and a time domain position of the CORESET0 is determined by a search resource set 0 (SSset0). 14.The method of claim 12, wherein the starting position of the first time period is an X th time unit after the first offset, the second offset, or the third offset, X being an integer greater than 0, and wherein the X th time unit is a starting time unit of a CORESET0 determined by a SSB index i, and the SSB index i represents an index corresponding to a SSB associated with the first signal. 15.The method of claim 5, wherein a length of the first time period comprises one of the following: X SSB periods, X half-frames in which a synchronization signal burst is located, or the first time period contains Y PDCCH monitoring occasions, wherein X and Y are integers greater than 0. 16.The method of claim 5, wherein the step of determining the starting position and / or the length of the first time period further comprises: determining an ending position of the first time period, wherein the ending position of the first time period is a time unit in which the user equipment re-sends a PRACH after receiving the RAR or a time unit after the time unit in which the user equipment re-sends the PRACH after receiving the RAR. 17.The method of claim 2, wherein the step of monitoring the physical downlink control channel (PDCCH) of the on-demand SIB1 further comprises: monitoring the PDCCH of the on-demand SIB1 in at least one monitoring occasion of a plurality of monitoring occasions of the PDCCH, wherein the plurality of monitoring occasions of the PDCCH have a corresponding relationship with a plurality of indexes of SSBs, and the at least one monitoring occasion corresponds to a selected index of the SSBs. 18.The method of claim 5, further comprising: re-sending the first signal if the PDCCH of the on-demand SIB1 or the on-demand SIB1 is not correctly received in the first time period. ​ ​ ​ ​ 19.The method of claim 1, wherein the configuration message is carried by a master information block (MIB) or a system message.

20. The method of claim 1, wherein parameters of the configuration message comprise: a number of repetitions of the first signal or a threshold value corresponding to the number of repetitions, and / or an RSRP threshold.

21. The method of claim 1, wherein, The configuration message further comprises an on-demand SIB1 configuration, the on-demand SIB1 configuration comprising a number of repetitions of the first signal or a threshold value corresponding to the number of repetitions, the on-demand SIB1 configuration being used for a next request of an on-demand SIB1. 22.The method of claim 1, wherein the configuration message comprises indication information indicating to send the first signal to a target base station, the sending the first signal according to the configuration message comprising: determining a target base station according to a source of the configuration message, and sending the first signal to the target base station.

23. The method of claim 1, wherein, The on-demand SIB1 comprises indication information indicating to send the first signal to a target base station. 24.The method of claim 1, wherein the configuration message comprises a first parameter indicating a resource of the first signal, the first parameter being associated with a cell ID, or the resource of the first signal comprising a plurality of resource subsets, the resource subsets being associated with cell IDs. 25.The method of claim 1, wherein the configuration message comprises a second parameter indicating a sequence of the first signal, the second parameter being associated with a cell ID, or the sequence of the first signal comprising a plurality of sequence subsets, the sequence subsets being associated with cell IDs. 26.The method of claim 24 or 25, wherein the user equipment determines a configuration parameter or a preamble of the first signal according to a purpose of requesting the on-demand SIB1, the purpose comprising that the user equipment camps on a cell or initiates a random access procedure to establish a radio resource control (RRC) connected state. 27.The method of claim 13, wherein the index of the CORESET0 and / or the index of the SSset0 is carried by a sub-PDU of a media access control (MAC) protocol data unit (PDU). 28.The method of claim 13, wherein the index of the CORESET0 and / or the index of the SSset0 is carried by a media access control (MAC) random access response (RAR). 29.The method of claim 13, wherein at least one of the following parameters in the configuration message is common for multiple cells: an energy per resource element in secondary synchronization signal (SSS) parameter ss-PBCH-BlockPower, a PRACH target received power parameter preambleReceivedTargetPower, a PRACH maximum transmission number parameter preambleTransMax, a power ramping step parameter powerRampingStep, a RAR time window parameter ra-ResponseWindow, a parameter ssb-perRACH-Occasion that sets a mapping relationship of SSB and RO, a parameter msg1-SubcarrierSpacing that sets a subcarrier spacing of PRACH, a parameter restrictedSetConfig that determines a cyclic shift of a preamble sequence, or a maximum allowed transmit power parameter p-Max. 30.The method of claim 1, wherein during a period from after the sending of the first signal to an ending position of the on-demand SIB1 time window, the method further comprises: monitoring a paging downlink control information (DCI) at a paging occasion; and monitoring a PDCCH scrambled with a system information radio network temporary identifier (SI-RNTI) within a correction time when the received paging DCI indicates a system information change. 31.The method of claim 1, wherein during a period from after the sending of the first signal to an ending position of the on-demand SIB1 time window, the method further comprises: monitoring a paging downlink control information (DCI) at a paging occasion, wherein the paging DCI is not used to indicate a system information change; and monitoring a PDCCH scrambled with a system information radio network temporary identifier (SI-RNTI) within the on-demand SIB1 time window. 32.The method of claim 30 or 31, wherein during a period from after the sending of the first signal to an ending position of the on-demand SIB1 time window, the method further comprises: monitoring a paging early indication at an occasion indicated by the paging early indication. 33.The method of claim 1, further comprising: determining whether to monitor the paging DCI according to a random access response in the confirmation signal. 34.The method of claim 1, wherein during a period from after the sending of the first signal to an ending position of the on-demand SIB1 time window, the method further comprises: suspending monitoring of the paging DCI and / or the paging early indication. 35.The method of claim 30, wherein after the sending of the first signal and during a period from receiving the paging DCI to an ending position of a correction time, the method further comprises: receiving the system information within the correction time and / or the on-demand SIB1 time window. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 36. A user equipment comprising: A processor and a memory for storing a computer program, the processor being configured to invoke and run the computer program stored in the memory to perform the method according to any one of claims 1 to 35. 37.A method for transmission of on-demand system information block, for execution by a network device, the network device comprising a first base station and a second base station, comprising: transmitting, from the first base station of the network device, a configuration message to a user equipment, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or parameters for receiving an on-demand system information block (SIB1) ; receiving, by the second base station of the network device, the first signal sent from the user equipment according to the configuration message, the first signal being used to request the on-demand system information block (SIB1) from the second base station; sending, by the second base station, an acknowledgement signal of the first signal to the user equipment; and transmitting, by the second base station, the on-demand SIB1. 38.The method of claim 37, wherein the first base station and the second base station are the same base station. 39.The method of claim 37, wherein the first signal is carried by a physical random access channel (PRACH). 40.The method of claim 37, wherein the configuration message is carried by a master information block (MIB) or a system message.

41. The method of claim 37, wherein the parameters of the configuration message further comprise: a number of repetitions of the first signal or a threshold value corresponding to the number of repetitions and / or a RSRP threshold.

42. The method of claim 37, wherein, the configuration message further comprises an on-demand SIB1 configuration, the on-demand SIB1 configuration comprising the number of repetitions of the first signal or the threshold value corresponding to the number of repetitions, the on-demand SIB1 configuration being used for the next time when requesting the on-demand SIB1. 43.The method of claim 37, wherein the configuration message comprises indication information, the indication information being used to indicate sending the first signal to a target base station.

44. The method of claim 37, wherein, the on-demand SIB1 comprises indication information, the indication information being used to indicate sending the first signal to a target base station. 45.The method of claim 37, wherein the configuration message comprises a first parameter, the first parameter being used to indicate resources of the first signal, the first parameter being associated with a cell ID or the resources of the first signal comprising a plurality of resource subsets, the resource subsets being associated with a cell ID. 46.The method of claim 37, wherein the configuration message comprises a second parameter, the second parameter being used to indicate a sequence of the first signal, the second parameter being associated with a cell ID or the sequence of the first signal comprising a plurality of sequence subsets, the sequence subsets being associated with a cell ID. 47.The method of claim 37, wherein at least one of the following parameters in the configuration message is common for multiple cells: an energy per resource element in secondary synchronization signal (SSS) parameter ss-PBCH-BlockPower, a PRACH target received power parameter preambleReceivedTargetPower, a PRACH maximum transmission number parameter preambleTransMax, a power ramping step parameter powerRampingStep, a RAR time window parameter ra-ResponseWindow, a parameter ssb-perRACH-Occasion that sets a mapping relationship between SSB and RO, a parameter msg1-SubcarrierSpacing that sets a subcarrier spacing of PRACH, a parameter restrictedSetConfig that determines a cyclic shift of a preamble sequence, or a maximum allowed transmit power parameter p-Max. 48.A network device comprising: a first base station configured to transmit a configuration message to a user equipment, wherein the configuration message comprises parameters for the user equipment to send a first signal and / or to receive an on-demand system information block 1 (SIB1) ; and a second base station configured to receive the first signal sent from the user equipment according to the configuration message, the first signal is used to request the on-demand SIB1 to the second base station, and the second base station is configured to send an acknowledgement signal of the first signal to the user equipment, and transmit the on-demand SIB1 to the user equipment. 49.The network device of claim 48, wherein the first base station and the second base station are the same base station. 50.The network device of claim 48, wherein the first signal is carried by a physical random access channel (PRACH). 51.The network device of claim 48, wherein the configuration message is carried by a master information block (MIB) or a system message.

52. The network device of claim 48, wherein the parameters of the configuration message further comprise: a number of repetitions of the first signal or a threshold value corresponding to the number of repetitions and / or a RSRP threshold.

53. The network device of claim 48, wherein, the configuration message further comprises an on-demand SIB1 configuration, the on-demand SIB1 configuration comprises the number of repetitions of the first signal or a threshold value corresponding to the number of repetitions, and the on-demand SIB1 configuration is used for a next time when the on-demand SIB1 is requested. 54.The network device of claim 48, wherein the configuration message comprises an indication information, the indication information is used to indicate that the first signal is sent to a target base station.

55. The network device of claim 48, wherein, the on-demand SIB1 comprises an indication information, the indication information is used to indicate that the first signal is sent to a target base station. 56.The network device of claim 48, wherein the configuration message comprises a first parameter, the first parameter is used to indicate resources of the first signal, the first parameter is associated with a cell ID, or the resources of the first signal comprise a plurality of resource subsets, and the resource subsets are associated with cell IDs. 57.The network device of claim 48, wherein the configuration message comprises a second parameter used to indicate a sequence of the first signal, the second parameter is associated with a cell ID, or the sequence of the first signal comprises a plurality of sequence subsets, and the sequence subsets are associated with cell IDs. 58.The network device of claim 48, wherein at least one of the following parameters in the configuration message is common for a plurality of cells: an energy parameter ss-PBCH-BlockPower of each resource element in a secondary synchronization signal (SSS), a PRACH target received power parameter preambleReceivedTargetPower, a PRACH maximum transmission number parameter preambleTransMax, a power ramping step parameter powerRampingStep, a RAR time window parameter ra-ResponseWindow, a parameter ssb-perRACH-Occasion used to set a mapping relationship between SSBs and ROs, a parameter msg1-SubcarrierSpacing used to set a subcarrier spacing of a PRACH, a parameter restrictedSetConfig used to determine a cyclic shift of a preamble sequence, or a maximum allowed transmit power parameter p-Max.

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