Information acquisition and transmission method and device, and computer readable storage medium

Abstract

The invention discloses an information acquisition and transmission method and device, and a computer readable storage medium. The information acquisition method comprises the following steps: acquiring basic information; by adopting the scheme, the terminal equipment can obtain the on-demand public uplink and downlink signals / channels in the serving cell.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular to an information acquisition and transmission method, device, and computer-readable storage medium. Background Art

[0002] In the multi-carrier scenario, the concepts of anchor cells and non-anchor cells are introduced. Anchor cells have a larger coverage area and smaller capacity, and provide control functions for resident terminal devices. Non-anchor cells have a smaller coverage area and larger capacity, and provide data transceiver services for resident terminal devices. Idle / inactive terminal devices can reside in anchor cells. When a terminal device performs data transceiver services, the network device can switch the terminal device to a non-anchor cell.

[0003] In a multi-carrier scenario, when a terminal device needs to send and receive data, the terminal device needs to obtain common uplink and downlink signals / channels on demand. However, in the prior art, there is no solution for a terminal device to obtain common uplink and downlink signals / channels on demand. Summary of the invention

[0004] The object of the present invention is to provide an information acquisition and transmission method, so that a terminal device can obtain on-demand public uplink and downlink signals / channels without accessing a candidate cell (non-anchor cell).

[0005] In a first aspect, the present invention provides an information acquisition method, comprising: acquiring basic information.

[0006] When the terminal device resides in the serving cell (anchor cell), it obtains basic information. Then, the terminal device can perform measurements based on the basic synchronization signal blocks sent by the candidate cell (non-anchor cell) and report the measurement results during the random access process.

[0007] Optionally, the obtaining of basic information includes: obtaining a system message; and obtaining the basic information from the system message.

[0008] Optionally, the acquiring the basic information from the system message includes: acquiring the basic information from measurement information of the system message.

[0009] The network device carries the configuration information of the basic synchronization signal block in the measurement information, that is, the network device reuses the measurement information, which can save signaling overhead.

[0010] Optionally, the obtaining of basic information includes: receiving a random access response; and obtaining the basic information from the random access response.

[0011] Only the terminal device that resides in the serving cell and initiates the random access process can obtain the basic information. In other words, only the terminal device that resides in the serving cell and initiates the random access process can receive the basic synchronization signal block sent by the candidate cell and perform the measurement operation.

[0012] Optionally, the basic information includes: configuration information of a basic common downlink signal / channel, and / or configuration information of a basic common uplink signal / channel.

[0013] Optionally, the configuration information of the basic common downlink signal / channel includes: configuration information of a basic synchronization signal block.

[0014] Optionally, the basic synchronization signal block includes at least one of the following: a discovery reference signal, and a reduced synchronization signal block.

[0015] Optionally, the configuration information of the basic common uplink signal / channel includes: configuration information of basic random access resources.

[0016] Optionally, the configuration information of the basic random access resource includes at least one of the following: configuration information of contention-based random access resources and configuration information of contention-free random access resources.

[0017] In a second aspect, the present invention provides another information acquisition method, comprising: reporting on-demand information capability, wherein the on-demand information capability indicates the ability to obtain on-demand information, wherein the on-demand information includes configuration information of on-demand common downlink signals / channels, and / or configuration information of on-demand common uplink signals / channels.

[0018] The terminal device reports the on-demand information capability to the network device to indicate that the terminal device has the information of the on-demand capability. The network device receives the on-demand information capability and determines that the terminal device has the ability to obtain on-demand information. As a result, the network device can send the on-demand information capability to the terminal device, so that the terminal device can obtain the on-demand information as soon as possible, including the configuration information of the on-demand common downlink signal / channel, and / or the configuration information of the on-demand common uplink signal / channel.

[0019] Optionally, the on-demand information further includes: validation information of the on-demand common downlink signal / channel, and / or validation information of the on-demand common uplink signal / channel.

[0020] Optionally, the on-demand information capability indicates the ability to obtain the on-demand information through a random access response.

[0021] Optionally, the reporting of the on-demand information capability includes: using a physical random access channel to report the on-demand information capability.

[0022] The terminal device reports the on-demand information capability via PRACH, so the network device can learn as soon as possible that the terminal device has the ability to obtain on-demand information. As a result, the network device can send the on-demand information to the terminal device as soon as possible (via RAR), so that the terminal device can obtain and use the on-demand information as soon as possible.

[0023] Optionally, the on-demand information capability indicates the ability to obtain the on-demand information through Msg4 or MsgB.

[0024] Optionally, the on-demand information capability reporting includes: using Msg3 or MsgA to report the on-demand information capability.

[0025] In the service cell, the terminal device can inform the network device through Msg3 or MsgA that it has the ability to obtain on-demand information through Msg4 or MsgB. Based on the on-demand information capability reported by the terminal device, the network device can send on-demand information in Msg4 or MsgB accordingly. When the terminal device receives Msg4 or MsgB, it can obtain the on-demand information from it and then use the on-demand information.

[0026] Optionally, the terminal device may also report the measurement result of at least one candidate cell.

[0027] The network device may obtain the measurement result of at least one candidate cell according to Msg3 or MsgA reported by the terminal device. The network device may select any one or more of a suitable candidate cell, a basic synchronization signal block corresponding to the candidate cell, a random access (RACH) resource, etc. according to the measurement result of at least one candidate cell.

[0028] In a third aspect, the present invention further provides another information acquisition method, comprising: acquiring on-demand information, wherein the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

[0029] The network device sends on-demand information to the terminal device, so that the terminal device can use the on-demand common uplink signal / channel and / or the on-demand common downlink signal / channel.

[0030] Optionally, the on-demand information further includes: validation information of the on-demand common downlink signal / channel, and / or validation information of the on-demand common uplink signal / channel.

[0031] Optionally, the obtaining of the on-demand information includes: obtaining the on-demand information from a received random access response.

[0032] In the service cell, the terminal device can send the on-demand information capability through Msg1 or MsgA, and the network device can send the on-demand information through Msg2 or MsgB. As a result, the network device can send the on-demand information to the terminal device as soon as possible, that is, the terminal device can obtain the on-demand information as soon as possible, and then use the on-demand public uplink signal / channel and the on-demand public downlink signal / channel. Optionally, the obtaining of the on-demand information includes: obtaining the on-demand information from the received Msg4 or MsgB.

[0033] In the serving cell, the terminal device can send the on-demand information capability through Msg3 or MsgA, and the network device can send the on-demand information through Msg4 or MsgB. As a result, the network device can send the on-demand information to the terminal device as soon as possible, that is, the terminal device can obtain the on-demand information as soon as possible, and then use the on-demand common uplink signal / channel and / or the on-demand common downlink signal / channel.

[0034] Optionally, the configuration information of the on-demand common downlink signal / channel includes: configuration information of an on-demand synchronization signal block.

[0035] Optionally, the configuration information of the on-demand synchronization signal block includes at least one of the following: the configuration information of the on-demand synchronization signal block includes at least one of the following: the frequency domain position of the on-demand synchronization signal block, the period of the on-demand synchronization signal block, the time domain offset of the on-demand synchronization signal block, and the actual sending position of the on-demand synchronization signal block.

[0036] Optionally, the configuration information of the on-demand synchronization signal block also includes: a sending window position of the on-demand synchronization signal block.

[0037] The network device can configure the window for blind detection of the on-demand synchronization signal block by configuring the sending window of the on-demand synchronization signal block, that is, the network device can send the on-demand synchronization signal block at certain positions within the sending window, and the terminal device determines whether the on-demand synchronization signal block exists through blind detection. By configuring the sending window position, the time domain flexibility of the network device in sending the on-demand synchronization signal block can be improved.

[0038] Optionally, the validity information of the on-demand common downlink signal / channel includes: the validity time of the configuration information of the on-demand common downlink signal / channel.

[0039] The sending window is effective within the effective time of the sending window. The sending window is not effective outside the effective time of the sending window. By configuring the effective time, you can flexibly adjust the sending window.

[0040] Optionally, the terminal device may also receive the on-demand common downlink signal / channel according to the configuration information of the on-demand common downlink signal / channel.

[0041] Optionally, the terminal device may also send a random access channel to at least one of the candidate cells according to the configuration information of the on-demand common uplink signal / channel.

[0042] Optionally, the configuration information of the on-demand common uplink signal / channel includes: configuration information of on-demand random access resources. Optionally, the configuration information of the on-demand random access resources includes at least one of the following: configuration information of contention-based random access resources and configuration information of contention-free random access resources.

[0043] Optionally, the effectiveness information of the contention-based random access resource includes: the effectiveness time of the contention-based random access resource.

[0044] Optionally, the effectiveness information of the contention-free random access resource includes at least one of the following: the effectiveness time of the contention-free random access resource and the selection information of the contention-free random access resource.

[0045] Optionally, the selection information of the contention-free random access resource includes at least one contention-free random access resource.

[0046] Optionally, the contention-free random access resources include: a synchronization signal block index, a random access preamble index, and a physical random access channel mask index; or, the contention-free random access resources include: a synchronization signal block index and a physical random access channel mask index.

[0047] In a fourth aspect, the present invention further provides another information acquisition method, comprising: acquiring a cell switching instruction from a message of a random access process, and switching to a target cell indicated by the cell switching instruction.

[0048] The terminal device obtains a cell switching instruction during the random access process, and can switch to the target cell after completing the random access process, thereby increasing the speed of cell switching of the terminal device.

[0049] Optionally, obtaining the cell switching instruction from the message of the random access process includes: obtaining the cell switching instruction from the Msg4 or MsgB.

[0050] Optionally, the Msg4 or MsgB includes an RRC establishment message.

[0051] Optionally, obtaining the cell switching instruction from the message of the random access process includes: obtaining the cell switching instruction from the Msg6.

[0052] Optionally, the Msg6 includes an RRC re-establishment message.

[0053] In a fifth aspect, the present invention provides an information transmission method, comprising: sending basic information.

[0054] Optionally, the sending of basic information includes: sending a system message, wherein the system message includes the basic information.

[0055] Optionally, the measurement information of the system message includes the basic information.

[0056] Optionally, the sending of basic information includes: sending a random access response, wherein the random access response includes the basic information. The on-demand information also includes: validation information of the on-demand common downlink signal / channel, and / or validation information of the on-demand common uplink signal / channel.

[0057] Optionally, the on-demand information further includes: validation information of the on-demand common downlink signal / channel, and / or validation information of the on-demand common uplink signal / channel.

[0058] Optionally, the basic synchronization signal block includes at least one of the following: a discovery reference signal, and a reduced synchronization signal block.

[0059] In a sixth aspect, the present invention provides another information transmission method, comprising: obtaining on-demand information capability, wherein the on-demand information capability indicates the ability to obtain on-demand information, and the on-demand information includes configuration information of on-demand common downlink signals / channels, and / or configuration information of on-demand common uplink signals / channels.

[0060] Optionally, the on-demand information further includes: validation information of the on-demand common downlink signal / channel, and / or validation information of the on-demand common uplink signal / channel.

[0061] Optionally, the on-demand information capability indicates the ability to obtain the on-demand information through a random access response.

[0062] Optionally, the acquiring the on-demand information capability includes: acquiring the on-demand information capability from a received physical random access channel.

[0063] Optionally, the on-demand information capability indicates the ability to obtain the on-demand information through Msg4 or MsgB.

[0064] Optionally, the acquiring the on-demand information capability includes: acquiring the on-demand information capability from Msg3 or MsgA.

[0065] Optionally, the network device may also obtain at least one measurement result.

[0066] In a seventh aspect, the present invention provides another information transmission method, comprising: sending on-demand information, wherein the on-demand information includes configuration information of on-demand common uplink and downlink signals / channels, and / or effectiveness information of the on-demand common uplink and downlink signals / channels.

[0067] Optionally, the network device may also send the on-demand common downlink signal / channel according to the configuration information of the on-demand common downlink signal / channel.

[0068] Optionally, the network device may also receive a random access channel sent by at least one of the candidate cells according to the configuration information of the on-demand common uplink signal / channel.

[0069] Optionally, the configuration information of the on-demand common uplink signal / channel includes: configuration information of on-demand random access resources.

[0070] Optionally, the configuration information of the on-demand random access resources includes at least one of the following: configuration information of contention-based random access resources and configuration information of contention-free random access resources.

[0071] Optionally, the effectiveness information of the contention-based random access resource includes: the effectiveness time of the contention-based random access resource.

[0072] Optionally, the effectiveness information of the contention-free random access resource includes at least one of the following: the effectiveness time of the contention-free random access resource and the selection information of the contention-free random access resource.

[0073] Optionally, the selection information of the contention-free random access resource includes at least one contention-free random access resource.

[0074] Optionally, the contention-free random access resources include: a synchronization signal block index, a random access preamble index, and a physical random access channel mask index; or, the contention-free random access resources include: a synchronization signal block index and a physical random access channel mask index.

[0075] In an eighth aspect, the present invention further provides another information transmission method, comprising: sending a message of a random access process, wherein the message of the random access process includes a cell switching instruction.

[0076] Optionally, the Msg4 or MsgB includes the cell switching instruction.

[0077] Optionally, the Msg4 or MsgB includes an RRC establishment message.

[0078] Optionally, the Msg6 includes the cell switching instruction.

[0079] Optionally, the Msg6 includes an RRC re-establishment message.

[0080] In a ninth aspect, the present invention further provides an information acquisition device, comprising: an acquisition unit, for acquiring basic information.

[0081] In the tenth aspect, the present invention also provides another information acquisition device, including: a reporting unit, used to report on-demand information capability, the on-demand information capability indicates the ability to obtain on-demand information, the on-demand information includes on-demand common downlink signal / channel configuration information, and / or, on-demand common uplink signal / channel configuration information.

[0082] In the eleventh aspect, the present invention also provides another information acquisition device, including: an acquisition unit, used to obtain on-demand information, wherein the on-demand information includes configuration information of on-demand common downlink signals / channels, and / or configuration information of on-demand common uplink signals / channels.

[0083] In a twelfth aspect, the present invention further provides another information acquisition device, comprising: an acquisition unit, used to obtain a cell switching instruction from a message of a random access process, and switch to a target cell indicated by the cell switching instruction.

[0084] In a thirteenth aspect, the present invention further provides an information transmission device, comprising: a sending unit, used for sending basic information.

[0085] In a fourteenth aspect, the present invention also provides another information transmission device, comprising: an acquisition unit, used to obtain on-demand information capability, the on-demand information capability indicating the ability to obtain on-demand information, the on-demand information including on-demand common downlink signal / channel configuration information, and / or, on-demand common uplink signal / channel configuration information.

[0086] In the fifteenth aspect, the present invention also provides another information transmission device, including: a sending unit, used to send on-demand information, the on-demand information includes configuration information of on-demand common uplink and downlink signals / channels, and / or, effectiveness information of the on-demand common uplink and downlink signals / channels.

[0087] In a sixteenth aspect, the present invention further provides another information transmission device, comprising: a sending unit, configured to send a message of a random access process, wherein the message of the random access process comprises a cell switching instruction.

[0088] In the seventeenth aspect, the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the above-mentioned information acquisition methods are executed.

[0089] In the eighteenth aspect, the present invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the above-mentioned information transmission methods are executed.

[0090] In the nineteenth aspect, the present invention also provides another information acquisition device, including a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and the processor executes the steps of any one of the above-mentioned information acquisition methods when running the computer program.

[0091] In the twentieth aspect, the present invention also provides another information transmission device, including a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and the processor executes the steps of any one of the above-mentioned information transmission methods when running the computer program. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] Figure 1 is a flow chart of an information acquisition method in an embodiment of the present invention;

[0093] Figure 2 is a flow chart of another information acquisition method in an embodiment of the present invention;

[0094] Figure 3 is a flow chart of another information acquisition method in an embodiment of the present invention;

[0095] Figure 4 is a flow chart of another information acquisition method in an embodiment of the present invention;

[0096] Figure 5 is a flow chart of an information transmission method in an embodiment of the present invention;

[0097] Figure 6 is a flow chart of another information transmission method in an embodiment of the present invention;

[0098] Figure 7 is a flow chart of another information transmission method in an embodiment of the present invention;

[0099] Figure 8 is a flow chart of another information transmission method in an embodiment of the present invention;

[0100] Fig. 9 is a structural schematic diagram of an information acquisition device in an embodiment of the present invention;

[0101] Fig.10 is a schematic structural diagram of another information acquisition device in an embodiment of the present invention;

[0102] Fig.11 is a structural schematic diagram of another information acquisition device in an embodiment of the present invention;

[0103] Fig.12 is a structural schematic diagram of another information acquisition device in an embodiment of the present invention;

[0104] Fig.13 is a structural schematic diagram of an information transmission device in an embodiment of the present invention;

[0105] Fig.14 is a schematic structural diagram of another information transmission device in an embodiment of the present invention;

[0106] Fig.15 is a structural schematic diagram of another information transmission device in an embodiment of the present invention;

[0107] Fig.16 It is a structural diagram of yet another information transmission device in an embodiment of the present invention. DETAILED DESCRIPTION

[0108] In the prior art, in a multi-carrier scenario, when a terminal device needs to send or receive data, the terminal device needs to initiate a random access process. When the anchor cell measures the uplink signal of the terminal device or obtains the measurement results reported by the terminal device and learns that the terminal device is within the coverage of some non-anchor cells, the anchor cell can apply to the non-anchor cell for on-demand public uplink and downlink signals / channels, etc., so that the terminal device can access the target cell after the random access is completed. The public uplink signal / channel includes the Physical Random Access Channel (PRACH), and the public downlink signal / channel includes the synchronization signal block, system information block 1 (SIB1), etc.

[0109] However, in the prior art, in a multi-carrier scenario, there is no solution for a terminal device to obtain common uplink and downlink / channels on demand.

[0110] In the embodiment of the present invention, when the terminal device resides in the serving cell (anchor cell), basic information is obtained. The candidate cell (non-anchor cell) can send a basic synchronization signal block to the terminal device, and the terminal device can perform measurements (such as inter-frequency measurements, etc.) and report the measurement results during the random access process. In this way, the terminal device can obtain the common uplink and downlink signals / channels on demand.

[0111] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0112] The terminal device described in the embodiments of the present application is a device with a wireless communication function, which may also be referred to as a terminal, a mobile station (MS), a mobile terminal (MT), an access terminal device, a vehicle-mounted terminal device, an industrial control terminal device, a user equipment (UE), a UE unit, a UE station, a mobile station, a remote station, a remote terminal device, a mobile device, a wireless communication device, a UE agent, an Internet of Things device, a passive device or a UE device, etc. The UE may be fixed or mobile. It should be noted that the UE may support at least one wireless communication technology, such as LTE, NR, etc. Exemplarily, the UE may be a mobile phone, a tablet computer (pad), a desktop computer, a laptop computer, an all-in-one computer, a vehicle-mounted terminal, a virtual reality (VR) UE, an augmented reality (AR) UE, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a UE in a future mobile communication network, or a UE in a future evolved public mobile land network (PLMN), etc. In some embodiments of the present application, the UE may also be a device with transceiver functions, such as a chip system, a chip module, etc. The chip system and the chip module may include a chip and may also include other discrete devices.

[0113] In some embodiments of the present application, the terminal device may also be a chip, a device, a unit, etc., which will not be elaborated herein.

[0114] In the embodiment of the present application, the network device is a device that provides wireless communication functions for the terminal device, and may also be referred to as a radio access network (RAN) device, or an access network element, an access network device, etc. Among them, the network device may support at least one wireless communication technology, such as LTE, NR, etc. The network device may be responsible for radio resource management (RRM), quality of service (QoS) management, data compression and encryption, data transmission and reception, etc. on the air interface side.

[0115] By way of example, network equipment includes, but is not limited to, next generation base stations (generation node B, gNB) in 5G, evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node ​​B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit, BBU), transmitting and receiving point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, master node (masternode, MN) in a dual-connection architecture, second node or secondary node (secondary node, SN) in a dual-connection architecture, etc., without specific limitation.

[0116] The network device may also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in future mobile communications or a network device in a future evolving PLMN. In some embodiments, the network device may also be a device having a wireless communication function for a terminal device, such as a chip system. For example, the chip system may include a chip and may also include other discrete devices.

[0117] The network device may include a device in a core network (CN). For example, the device in the CN may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc.

[0118] The network device may also be an access point (AP) in a WLAN, a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, and the like.

[0119] The network device may be any site in the multi-site that performs incoherent joint transmission with the terminal device, or other sites outside the multi-site, or other network devices that perform network communication with the terminal device, and there is no specific restriction on this. Among them, the multi-site incoherent joint transmission can be a plurality of sites joint incoherent transmission, or different data belonging to the same PDSCH is sent from different sites to the terminal device, and the names with the same meaning specified in other standards are also applicable to this application, that is, this application does not limit the names of these parameters.

[0120] It should be noted that the TRP of the present application is not limited to coherent joint transmission or incoherent joint transmission scenarios, but can also be applied to other scenarios without specific restrictions.

[0121] The network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0122] The network equipment can provide services for the cell, and the terminal equipment in the cell can communicate with the network equipment through transmission resources (such as spectrum resources). The cell can be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, and a femto cell.

[0123] The network device may also include an active antenna unit (AAU). Among them, the CU implements part of the functions of the network device, and the DU implements another part of the functions of the network device. For example, the CU is responsible for processing non-real-time protocols and services, and implements the functions of the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, and implements the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. In addition, the AAU can implement some physical layer processing functions, radio frequency processing, and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this network deployment, high-level signaling (such as RRC signaling) can be considered to be generated by the CU, sent by the DU, or sent jointly by the DU and the AAU. It can be understood that the network device may include at least one of the CU, DU, and AAU. In addition, the CU may be classified as a RAN device, or the CU may be classified as a core network device, without any specific limitation.

[0124] The network device may be any site in the multi-site coherent joint transmission (CJT) with the terminal device, or other sites outside the multi-site, or other network devices that perform network communication with the terminal device, and there is no specific limitation on this. Among them, multi-site coherent joint transmission may be multiple sites coherent transmission, or different data belonging to the same physical downlink shared channel (PDSCH) are sent from different sites to the terminal device, or multiple sites are virtualized into one site for transmission, and names with the same meaning specified in other standards are also applicable to this application, that is, this application does not limit the names of these parameters. The sites in the multi-site coherent joint transmission may be remote radio heads (RRHs), TRPs, etc., and there is no specific limitation on this.

[0125] In some embodiments, the network device may also communicate with an Internet Protocol (IP) network, such as the Internet, a private IP network, or other data networks.

[0126] The wireless communication system involved in the embodiments of the present application may include the above-mentioned network equipment and terminal equipment. The wireless communication system involved in the embodiments of the present application may include: Narrow Band-Internet of Things (NB-IoT), Enhanced Data Rate for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access 2000 (CDMA2000), Time Division Synchronous Code Division Multiple Access (TDS-CDMA), Long Term Evolution (LTE), Fifth Generation Mobile Communication System (5G), Vehicle-mounted Wireless Short-Range Communication System, etc. The wireless communication system involved in the embodiments of the present application may also include subsequent systems that continue to evolve, such as future mobile communication systems such as the sixth generation mobile communication system and the seventh generation mobile communication system.

[0127] The present application can be applied to communication scenarios such as device to device (D2D) system, machine to machine (M2M) system, machine type communication (MTC), vehicle to vehicle (V2V) system, vehicle to everything (V2X) system, narrowband Internet of things (NB-IoT) system, and passive Internet of Things communication.

[0128] The present application can be applied to beamforming (beamforming), carrier aggregation (carrier aggregation, CA), dual connectivity (dual connectivity, DC) or standalone (standalone, SA) deployment scenarios, etc.

[0129] Since the embodiments of the present application describe various embodiments in conjunction with terminal devices and network devices, the terminal devices and network devices involved will be described in detail below.

[0130] It should be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article indicates that the associated objects before and after are in an "or" relationship.

[0131] The "plurality" appearing in the embodiments of the present application refers to two or more.

[0132] The first, second, etc. descriptions appearing in the embodiments of the present application are only used for illustration and distinction of the description objects. There is no order, nor do they indicate any special limitation on the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0133] The "connection" that appears in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and the embodiments of the present application do not impose any limitations on this.

[0134] The embodiment of the present invention provides a method for obtaining information. Figure 1 , the following is a detailed description through specific steps.

[0135] In an embodiment of the present invention, the information acquisition method provided in the following step 101 can be executed by a chip (such as a baseband chip) with data processing capabilities in the terminal device, or by a chip module with data processing capabilities in the terminal device, or by the terminal device. The following is an explanation of the information acquisition method provided by the following step 101 executed by the terminal device.

[0136] Step 101, obtaining basic information.

[0137] In practical applications, it can be seen that in a multi-carrier scenario, the network can be divided into a coverage layer and a capacity layer, where: the coverage layer is composed of low-frequency band carriers, with a wide coverage range, and provides idle and inactive state terminal devices to reside, providing most of the control functions; the capacity layer is composed of high-frequency band carriers, with a small coverage range and large capacity, and mainly provides data transmission and reception services. The coverage layer mainly provides wide-area coverage, and the capacity layer is mainly used to increase the capacity of hot spots (such as densely populated areas). The cells in the coverage layer can also be called anchor cells, and the cells in the capacity layer can also be called non-anchor cells.

[0138] Normally, a terminal device in an idle / inactive state resides in an anchor cell, which can also be called a service cell for the terminal device. For a certain terminal device, there can be multiple non-anchor cells in the service cell to provide data transmission and reception services for it, and these non-anchor cells can be called candidate cells for the terminal device. Furthermore, the service cell can instruct the terminal device to switch to a candidate cell among the candidate cells, and the indicated candidate cell is called the target cell of the terminal device.

[0139] For example, the serving cell instructs terminal device A to switch to candidate cell 1, and candidate cell 1 is the target cell of terminal device A.

[0140] In the embodiment of the present invention, the basic information may include configuration information of a basic common downlink signal / channel and / or configuration information of a basic common uplink signal / channel.

[0141] In some embodiments, the basic information may include only the configuration information of the basic common downlink signal / channel. In other embodiments, the basic information may include only the configuration information of the basic common uplink signal / channel. In still other embodiments, the basic information may include both the configuration information of the basic common downlink signal / channel and the configuration information of the basic common uplink signal / channel.

[0142] In some embodiments, the basic common downlink signal / channel may be a basic common downlink signal / channel of a candidate cell. The basic common uplink signal / channel may be a basic common uplink signal / channel of a candidate cell.

[0143] In some embodiments, the basic information may include configuration information of a basic common downlink signal / channel. In other embodiments, the basic information may include configuration information of a basic common uplink signal / channel. In still other embodiments, the basic information may include configuration information of a basic common downlink signal / channel and configuration information of a basic common uplink signal / channel.

[0144] In an embodiment of the present invention, the basic information may also include the effectiveness information of the basic common downlink signal / channel, and / or, the effectiveness information of the basic common uplink signal / channel. In the present invention, "effectiveness information" may be equivalent to "effectiveness information of configuration" or "effectiveness information of configuration information". That is to say, "effectiveness information of the common downlink signal / channel" may be equivalent to "effectiveness information of the configuration of the common downlink signal / channel", and "effectiveness information of the common downlink signal / channel" may be equivalent to "effectiveness information of the configuration information of the common downlink signal / channel".

[0145] Specifically, the validity information may include the effective start time and effective duration. In this way, it can be ensured that the configured signal / channel is effective only after the start time and only for a period of time, thereby reducing the resource overhead of the configured signal / channel. The start time may be the start time of a timer. The effective duration may be the running time of a timer.

[0146] Specifically, if the basic information includes configuration information of a basic common downlink signal / channel, the basic information may also include validation information of the basic common downlink signal / channel. If the basic information includes configuration information of a basic common uplink signal / channel, the basic information may also include validation information of the basic common uplink signal / channel.

[0147] In other words, the validation information of the basic common downlink signal / channel and the validation information of the basic common uplink signal / channel are optional items in the basic information.

[0148] In an embodiment of the present invention, the configuration information of the basic common downlink signal / channel may include configuration information of the basic synchronization signal block.

[0149] In an embodiment of the present invention, the basic synchronization signal block may be a synchronization signal block supporting fewer functions. For example, the basic synchronization signal block may support operations such as cell search, coarse downlink synchronization and / or measurement, but does not support operations such as fine downlink synchronization and cell selection / reselection. The basic synchronization signal block may also be referred to as a low complexity SSB or a reduced SSB.

[0150] Generally speaking, a synchronization signal block that supports operations such as precise downlink synchronization and / or cell selection / reselection may require the following characteristics: the beam of the synchronization signal block is finer to provide a larger beam gain; the period of the synchronization signal block is shorter to provide a sufficient number of signal samples; the synchronization signal block is associated with a system information block (SIB) for cell access during cell selection / reselection.

[0151] It is worth noting that in some scenarios (such as scenarios where reduced synchronization signal blocks are not used for network energy saving), the basic synchronization signal block can also support operations such as precise downlink synchronization and / or cell selection / reselection.

[0152] In a specific implementation, the basic synchronization signal block may also be a discovery reference signal (DRS).

[0153] In some embodiments, the basic synchronization signal block may be a basic synchronization signal block of the candidate cell.

[0154] In an embodiment of the present invention, the configuration information of the basic common uplink signal / channel may include the configuration information of the basic random access resource. The terminal device may use the basic random access resource to request more configuration information of the common downlink signal / channel and / or more configuration information of the common uplink signal / channel, so that the terminal device can access the candidate cell through the requested configuration information of more common uplink signals / channels, and then transmit and receive data in the candidate cell.

[0155] In some embodiments, the basic common uplink signal / channel may be a basic common uplink signal / channel of a candidate cell.

[0156] In the embodiment of the present invention, more configuration information of common downlink signals / channels can also be referred to as on-demand configuration information of common downlink signals / channels. More configuration information of common uplink signals / channels can also be referred to as on-demand configuration information of common uplink signals / channels.

[0157] The configuration information of the basic random access resource may be configuration information of the basic random access resource of the candidate cell.

[0158] In a specific implementation, the terminal device may reside in a service cell to obtain basic information.

[0159] The network device can send a system message to the terminal device, and the system message carries basic information. The terminal device obtains the basic information based on the received system message.

[0160] In some embodiments, basic information may be carried in the measurement information (such as inter-frequency measurement information) of the system message. The terminal device may obtain basic information from the measurement information (such as inter-frequency measurement information) of the system message. Generally speaking, the anchor cell and the non-anchor cell use different frequency points or frequency layers, and the system information already contains inter-frequency measurement information, so the above measurement information may use inter-frequency measurement information.

[0161] The network device carries the configuration information of the basic synchronization signal block in the heterofrequency measurement information, that is, the network device reuses the measurement information (such as the heterofrequency measurement information), which can save signaling overhead.

[0162] In a specific implementation, the terminal device may receive a basic synchronization signal block, perform measurements on candidate cells (such as inter-frequency measurements), and report the measurement results to the network device during a random access process.

[0163] The measurement result may include an identity or identification or index of a candidate cell, such as an identity or index of a candidate cell recommended by the terminal device, or an identity or index of a candidate cell considered the strongest by the terminal device (such as a candidate cell with the largest measurement value).

[0164] The measurement result may include measurement values, such as reference signal receiving power (RSRP) and signal to interference-noise ratio (SINR). The measurement value may be the measurement value of one or more basic synchronization signal blocks, or the maximum value of the measurement values ​​of multiple basic synchronization signal blocks, or the average (such as linear average) of the measurement values ​​in multiple basic synchronization signal blocks. A measurement value may be for a candidate cell.

[0165] The measurement result may include the index of the basic synchronization signal block, such as the index of the basic synchronization signal block recommended by the terminal device, the index of the basic synchronization signal block that the terminal device considers to be the strongest (such as the basic synchronization signal block with the largest measurement value). The index of a basic synchronization signal block may be for a candidate cell.

[0166] The measurement results may include the index of the beam, such as the index of the beam recommended by the terminal device, the index of the beam that the terminal device considers to be the strongest (such as the beam with the largest measurement value). The index of a beam may be for a candidate cell. A beam may be a beam corresponding to multiple basic synchronization signal blocks, and the terminal device selects a beam corresponding to (or associated with or mapped to) multiple basic synchronization signal blocks through a code book. Specifically, the indexes of multiple basic synchronization signal blocks may correspond to the index of a beam. This correspondence can be achieved through a code book. Through the correspondence between the basic synchronization signal block and the beam, the number of beams can be made greater than the basic synchronization signal block, and the terminal device can report beam information that is finer than the basic synchronization signal block.

[0167] It can be seen that the network device sends the configuration information of the basic synchronization signal block to the terminal device through the system message. The terminal device receives the system message and obtains the configuration information of the basic synchronization signal block from it.

[0168] In an embodiment of the present invention, the terminal device may further perform the following operations: obtaining a basic synchronization signal block, and performing measurement operations (such as heterofrequency measurement).

[0169] In a specific implementation, the terminal device can obtain the basic synchronization signal block sent by the candidate cell. Based on the basic synchronization signal block sent by the candidate cell, the terminal device performs measurement (such as inter-frequency measurement) on the candidate cell and reports the measurement result to the network device during the random access process. In this way, the terminal device obtains basic information, and completes the operation of measuring the candidate cell and reporting the corresponding measurement result.

[0170] In a specific implementation, when the terminal device switches to the serving cell, it may initiate a random access process to the network device. The terminal device may initiate the random access process using a four-step random access method.

[0171] Specifically, the four steps of the four-step random access process are:

[0172] 1) The terminal device sends PRACH to the network device. PRACH can also be called message 1 (Msg1). Since PRACH is carried by the preamble sequence, PRACH can also be called preamble.

[0173] 2) If the network device allows the terminal device to access, it sends a random access response (RAR) to the terminal device. RAR can also be called message 2 (Msg2). Msg2 may include information such as uplink grant (UL grant), leading sequence identifier (RAPID), cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI), etc.

[0174] 3) The terminal device may send message 3 (Msg3) to the network device based on the uplink time-frequency resource information provided by the uplink authorization in Msg2. Message 3 is carried by the physical uplink shared channel (PUSCH). Specifically, Msg3 may be a radio resource control setup request (RRC setup request) message.

[0175] 4) The network device obtains Msg3 sent by the terminal device and sends message 4 (Message 4, Msg4) to the terminal device. Msg4 can be an RRC establishment message. Generally speaking, when the terminal device receives Msg4, it is equivalent to completing the random access process.

[0176] The four-step random access procedure is also called the Type-1 random access procedure.

[0177] Specifically, the two steps of the two-step random access process are:

[0178] 1) The terminal device sends PRACH and PUSCH to the network device. PRACH and PUSCH can also be called Message A (MsgA). MsgA can include the contents of Msg1 and Msg3.

[0179] 2) If the network device allows the terminal device to access, it sends a random access response to the terminal device. For the two-step random access process, RAR can also be called Message B (MsgB). MsgB can include the contents of Msg2 and Msg4. Generally speaking, when the terminal device receives MsgB, it is equivalent to the terminal device completing the random access process.

[0180] The two-step random access procedure is also called the Type-2 random access procedure.

[0181] In addition, after the terminal device completes the random access process, it is generally necessary to send Msg5 (ie, RRC setup complete message).

[0182] In an embodiment of the present invention, during the random access process, the network device may carry basic information in the random access response. Accordingly, the terminal device may receive the random access response and obtain basic information therefrom. The terminal device may perform measurements (such as inter-frequency measurements) based on the basic synchronization signal blocks sent by the candidate cell and report the measurement results to the network device.

[0183] Thus, only the terminal device that resides in the serving cell and initiates the random access process can obtain basic information. In other words, only the terminal device that resides in the serving cell and initiates the random access process can receive the basic synchronization signal block sent by the candidate cell and perform measurement (such as inter-frequency measurement) operations.

[0184] In a specific implementation, the network device may learn which candidate cells the terminal device may be located within the coverage range of by measuring the PRACH sent by the terminal device to the serving cell.

[0185] The network device can select some candidate cells to send basic synchronization signal blocks (with configuration information of basic synchronization signal blocks). That is to say, not all candidate cells send basic synchronization signal blocks to the terminal device, but candidate cells that can cover the terminal device send basic synchronization signal blocks to the terminal device, thereby reducing the signaling overhead of the candidate cells. For example, the candidate cells include candidate cells 1 to candidate cells 6. The network device measures the PRACH sent by the terminal device to the serving cell and infers that the terminal device may be within the coverage of candidate cells 1 and candidate cells 2. The network device selects candidate cells 1 and candidate cells 2 to send basic synchronization signal blocks.

[0186] In the embodiment of the present invention, no distinction is made between "candidate cells that send basic synchronization signal blocks" and "candidate cells that do not send basic synchronization signal blocks".

[0187] The network device may select some candidate cells to receive the PRACH of the basic random access resources (with the configuration information of the random access resources). That is to say, not all candidate cells receive the PRACH of the basic random access resources, but the candidate cells that can cover the terminal device receive the PRACH of the basic random access resources, thereby reducing the signaling overhead of the candidate cells.

[0188] For example, the candidate cells include candidate cells 1 to 6. The network device measures the PRACH sent by the terminal device to the serving cell, and infers that the terminal device may be located within the coverage of candidate cells 1 and 2. The network device selects candidate cells 1 and 2 to send basic synchronization signal blocks, and receives the PRACH of the basic random access resource.

[0189] The present invention does not distinguish between "candidate cells that receive PRACH of basic random access resources" and "candidate cells that do not receive PRACH of basic random access resources". The "candidate cells" described in the present invention can be considered as "candidate cells that receive PRACH of basic random access resources".

[0190] The measurement result can be reported via Msg1 or MsgA. Since part of Msg1 or MsgA is carried by PRACH, PRACH can be reported as soon as possible, but needs to have a corresponding relationship with the measurement result (carrying fewer bits), so when the measurement result index information is used, Msg1 or MsgA is more suitable for reporting.

[0191] The measurement result can be reported through Msg3 or MsgA. Since the part of Msg3 or MsgA is carried by PUSCH, which can carry more bits, it is more suitable to report it through Msg3 or MsgA when the measurement result is a measured value. Figure 2The present invention provides another information acquisition method, which is described in detail through specific steps below.

[0192] In the embodiment of the present invention, the information acquisition method provided in the following step 201 can be executed by a chip (such as a baseband chip) with data processing capabilities in the terminal device, or by a chip module with data processing capabilities in the terminal device, or by the terminal device. The following is an explanation of the information acquisition method provided by the following step 201 executed by the terminal device.

[0193] Step 201: Report on-demand information capability.

[0194] In the embodiment of the present invention, the on-demand information capability may be used to indicate that the terminal device has the capability of obtaining on-demand information.

[0195] In the embodiment of the present invention, the on-demand information may include configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

[0196] In some embodiments, the on-demand information may include both configuration information of an on-demand common downlink signal / channel and configuration information of an on-demand common uplink signal / channel.

[0197] In the embodiment of the present invention, the on-demand common downlink signal / channel may be the on-demand common downlink signal / channel of the candidate cell. The on-demand common uplink signal / channel may be the on-demand common uplink signal / channel of the candidate cell.

[0198] In the embodiment of the present invention, the on-demand information may include configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

[0199] In some embodiments, the on-demand information may include both configuration information of an on-demand common downlink signal / channel and configuration information of an on-demand common uplink signal / channel.

[0200] In an embodiment of the present invention, the on-demand information may also include validation information of an on-demand common downlink signal / channel, and / or validation information of an on-demand common uplink signal / channel. The "validation information" in the embodiment of the present invention may be equivalent to "validation information of configuration" or "validation information of configuration information". In other words, "validation information of a common downlink signal / channel" may be equivalent to "validation information of configuration of a common downlink signal / channel", and "validation information of a common downlink signal / channel" may be equivalent to "validation information of configuration information of a common downlink signal / channel".

[0201] Specifically, the validity information includes the effective start time and the effective duration. In this way, it can be ensured that the configured signal / channel is effective only after the start time and only for a period of time, which can reduce the resource overhead of the configured signal / channel. The start time can be the start time of a timer. The effective duration can be the running time of a timer.

[0202] Specifically, if the on-demand information includes configuration information of the on-demand common downlink signal / channel, the on-demand information may also include validation information of the on-demand common downlink signal / channel. If the on-demand information includes configuration information of the on-demand common uplink signal / channel, the on-demand information may also include validation information of the on-demand common uplink signal / channel.

[0203] In other words, the above-mentioned validation information of the on-demand common downlink signal / channel and the validation information of the on-demand common uplink signal / channel are optional items in the on-demand information.

[0204] In an embodiment of the present invention, if the terminal device has the ability to obtain on-demand information, the terminal device can report the on-demand information capability through the physical random access channel (PRACH), and the on-demand information capability can be used to indicate that the terminal device has the ability to obtain on-demand information through a random access response (RAR).

[0205] The network device can determine whether the terminal device has reported the on-demand information capability based on the received PRACH. If the network device obtains the on-demand information capability from the PRACH, it can be determined that the terminal device has the capability to obtain on-demand information through the RAR.

[0206] Therefore, in the serving cell, the terminal device can inform the network device that it has the ability to obtain on-demand information through RAR through Msg1 or MsgA in the random access process. Based on the on-demand information capability reported by the terminal device, the network device can send the on-demand information in RAR accordingly. When the terminal device receives RAR, it can obtain the on-demand information from it and then use the on-demand information.

[0207] The terminal device reports the on-demand information capability via PRACH, so the network device can learn as soon as possible that the terminal device has the ability to obtain on-demand information. As a result, the network device can send the on-demand information to the terminal device as soon as possible (via RAR), so that the terminal device can obtain and use the on-demand information as soon as possible.

[0208] In addition, the network device can also determine which candidate cells the terminal device may be located in by measuring the PRACH. In this scenario, the candidate cell may not need to send a basic synchronization signal block to the terminal device.

[0209] In the embodiment of the present invention, if the terminal device has the capability of obtaining on-demand information, the terminal device may report the on-demand information capability through Msg3 or MsgA. The on-demand information capability may be used to indicate that the terminal device has the capability of obtaining on-demand information through Msg4 or MsgB.

[0210] The network device can determine whether the terminal device has reported the on-demand information capability based on the received Msg3 or MsgA. If the network device determines that the terminal device has reported the on-demand information capability based on Msg3 or MsgA, it can be determined that the terminal device has the ability to obtain on-demand information through Msg4 or MsgB. The network device can send on-demand information to the terminal device through Msg4 or MsgB.

[0211] Therefore, in the serving cell, the terminal device can inform the network device that it has the ability to obtain on-demand information through Msg4 or MsgB through Msg3 or MsgA in the random access process. Based on the on-demand information capability reported by the terminal device, the network device can send the on-demand information in Msg4 or MsgB accordingly. When the terminal device receives Msg4 or MsgB, it can obtain the on-demand information from it and then use the on-demand information.

[0212] The terminal device reports the on-demand information capability through Msg3 or MsgA, so the network device can learn as soon as possible that the terminal device has the ability to obtain on-demand information. Furthermore, the network device can send on-demand information to the terminal device as soon as possible (through Msg4 or MsgB), so that the terminal device can obtain and use the on-demand information as soon as possible.

[0213] Compared with PRACH, Msg3 or MsgA can carry more bits of information.

[0214] In a specific implementation, measurement information of the terminal device may also be reported in Msg3 or MsgA. Based on the measurement information in Msg3 or MsgA, the network device can learn which candidate cells the terminal device is within coverage of.

[0215] In some embodiments, the terminal device may obtain a basic synchronization signal block sent by the candidate cell. Based on the basic synchronization signal block sent by the candidate cell, the terminal device performs a measurement operation on the candidate cell to obtain a measurement result corresponding to each candidate cell.

[0216] Specifically, different candidate cells may send basic synchronization signals to the terminal device respectively, so that the terminal device can measure and obtain measurement results corresponding to different candidate cells.

[0217] The measurement information reported by the terminal device through Msg3 or MsgA may include the measurement result of at least one candidate cell. Specifically, the terminal device may report the measurement results of all candidate cells through Msg3 or MsgA. Alternatively, the terminal device may report the measurement results of some candidate cells through Msg3 or MsgA.

[0218] The network device may obtain the measurement result of at least one candidate cell according to Msg3 or MsgA reported by the terminal device. The network device may select any one or more of a suitable candidate cell, a basic synchronization signal block corresponding to the candidate cell, a random access (RACH) resource, etc. according to the measurement result of at least one candidate cell.

[0219] In practical applications, RACH resources may include PRACH occasions, preambles, etc. PRACH occasions may include frequency domain positions, time domain positions, etc. of PRACH. The time domain position of PRACH is usually specified by parameters such as prach-ConfigurationIndex, and the frequency domain position of PRACH is usually specified by parameters such as msg1-FDM and msg1-FrequencyStart. The number of preambles is usually 64, and the preamble used is configured by index.

[0220] In some embodiments, the PRACH opportunity is equivalent to the time-frequency domain resources of the PRACH, the preamble is equivalent to the code domain resources within the time-frequency domain resources of the PRACH, and the PRACH opportunity and the preamble together constitute the time-frequency code domain resources of the PRACH.

[0221] The basic synchronization signal block may be associated with the RACH resource. For example, the basic synchronization signal block is associated with the PRACH opportunity and the preamble. The terminal device may consider that the associated basic synchronization signal block and the RACH resource correspond to a pair of transmit beams and receive beams on the network device side.

[0222] In a specific implementation, the measurement information reported by the terminal device in Msg3 or MsgA may also include beam-level measurement results. That is, the terminal device may report the measurement result of at least one beam corresponding to at least one candidate cell. The network device may select a suitable beam based on the measurement information, and select the basic synchronization signal block and RACH resource corresponding to the beam.

[0223] In the embodiment of the present invention, if the network device requires the terminal device to report the measurement result, the network device can send basic information to the terminal device. The manner in which the network device sends basic information to the terminal device and the operation performed by the terminal device after receiving the basic synchronization signal block can correspond to the above step 101.

[0224] If the network device does not require the terminal device to report the measurement result, the network device does not need to send basic information to the terminal device. Accordingly, the terminal device does not need to perform the above step 101.

[0225] For example, the network device estimates which coverage areas the terminal device may be in by measuring the PRACH. In this scenario, the network device does not need to send basic information to the terminal device.

[0226] That is, in some embodiments, if the network device needs to obtain the measurement result, step 101 may be a pre-step of step 201. Before executing step 201, the terminal device may execute step 101 to obtain the measurement result.

[0227] In another embodiment, if the network device estimates which coverage areas the terminal device may be in by measuring the PRACH, it is not necessary to execute step 101 before executing step 201 .

[0228] Reference Figure 3 , another information acquisition method in an embodiment of the present invention is given, which is described in detail through specific steps below.

[0229] In the embodiment of the present invention, the information acquisition method provided in the following step 301 can be executed by a chip (such as a baseband chip) with data processing capabilities in the terminal device, or by a chip module with data processing capabilities in the terminal device, or by the terminal device. The following is an explanation of the information acquisition method provided by the following step 301 executed by the terminal device.

[0230] Step 301, obtaining on-demand information.

[0231] In the embodiment of the present invention, the on-demand information may include configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

[0232] In some embodiments, the on-demand information may include both configuration information of an on-demand common downlink signal / channel and configuration information of an on-demand common uplink signal / channel.

[0233] In the embodiment of the present invention, the on-demand common downlink signal / channel may be the on-demand common downlink signal / channel of the candidate cell. The on-demand common uplink signal / channel may be the on-demand common uplink signal / channel of the candidate cell.

[0234] In the embodiment of the present invention, the on-demand information may also include validation information of the on-demand common downlink signal / channel and / or validation information of the on-demand common uplink signal / channel. The "validation information" in the present invention may be equivalent to "validation information of configuration" or "validation information of configuration information".

[0235] That is to say, "validation information of common downlink signal / channel" is equivalent to "validation information of configuration of common downlink signal / channel", and "validation information of common downlink signal / channel" is equivalent to "validation information of configuration information of common downlink signal / channel".

[0236] Specifically, the validity information includes the effective start time and the effective duration. In this way, it can be ensured that the configured signal / channel is effective only after the start time and only for a period of time, which can reduce the resource overhead of the configured signal / channel. The start time can be the start time of a timer. The effective duration can be the running time of a timer.

[0237] Specifically, if the on-demand information includes configuration information of the on-demand common downlink signal / channel, the on-demand information may also include validation information of the on-demand common downlink signal / channel. If the on-demand information includes configuration information of the on-demand common uplink signal / channel, the on-demand information may also include validation information of the on-demand common uplink signal / channel.

[0238] In other words, the above-mentioned validation information of the on-demand common downlink signal / channel and the validation information of the on-demand common uplink signal / channel are optional items in the on-demand information.

[0239] In the embodiment of the present invention, the network device may know in advance whether the terminal device has the ability to receive on-demand information. Specifically, the terminal device may report the on-demand information capability to the network device to indicate that it has the ability to receive on-demand information. The process of the terminal device reporting the on-demand information capability to the network device and the process of the network device determining whether the terminal device has the ability to receive on-demand information can both refer to the above step 201.

[0240] It is understandable that the network device may also assume by default that the terminal device has the ability to receive on-demand information. In this scenario, there is no logical association between step 201 and step 301.

[0241] In the embodiment of the present invention, the network device determines that the terminal device has the ability to receive on-demand information. If the terminal device sends the on-demand information capability through Msg1 or MsgA, the network device can send the on-demand information through the random access response. Accordingly, the terminal device obtains the on-demand information from the received random access response.

[0242] Therefore, in the service cell, the terminal device can send the on-demand information capability through Msg1 or MsgA, and the network device can send the on-demand information through Msg2 or MsgB. Therefore, the network device can send the on-demand information to the terminal device as soon as possible, that is, the terminal device can obtain the on-demand information as soon as possible, and then use the on-demand common uplink signal / channel and / or the on-demand common downlink signal / channel.

[0243] If the terminal device sends the on-demand information capability through Msg3 or MsgA, the network device can send the on-demand information through Msg4 or MsgB. Accordingly, the terminal device obtains the on-demand information from the received Msg4 or MsgB.

[0244] In the serving cell, the terminal device can send the on-demand information capability through Msg3 or MsgA, and the network device can send the on-demand information through Msg4 or MsgB. As a result, the network device can send the on-demand information to the terminal device as soon as possible, that is, the terminal device can obtain the on-demand information as soon as possible, and then use the on-demand common uplink signal / channel and / or the on-demand common downlink signal / channel.

[0245] In an embodiment of the present invention, the configuration information of the on-demand common downlink signal / channel may include the configuration information of the on-demand synchronization signal block. The on-demand synchronization signal block can support more functions than the basic synchronization signal block. For example, the on-demand synchronization signal block can support operations such as coarse downlink synchronization, measurement, cell search, fine downlink synchronization and / or cell selection / reselection.

[0246] As mentioned above, in general, a synchronization signal block that supports operations such as fine downlink synchronization and / or cell selection / reselection may require some features. As mentioned above, in some scenarios (such as scenarios where reduced synchronization signal blocks are not used for network energy saving), a basic synchronization signal block may also support operations such as fine downlink synchronization and / or cell selection / reselection. In this case, the basic synchronization signal block may be equivalent to an on-demand synchronization signal block.

[0247] When the basic synchronization signal block is not equivalent to the on-demand synchronization signal block, the terminal device can obtain the configuration information of the on-demand synchronization signal block through the configuration information of the on-demand common downlink signal / channel, thereby using the on-demand synchronization signal block.

[0248] When the basic synchronization signal block is equivalent to the on-demand synchronization signal block, the configuration information of the on-demand common downlink signal / channel may not include the configuration information of the on-demand synchronization signal block, and the terminal device does not need to obtain the configuration information of the on-demand synchronization signal block through the configuration information of the on-demand common downlink signal / channel.

[0249] In a specific implementation, the terminal device can obtain an on-demand synchronization signal block based on the received on-demand information.

[0250] In this embodiment of the present invention, the on-demand synchronization signal block may be an on-demand synchronization signal block of a candidate cell.

[0251] Specifically, the terminal device may obtain the on-demand synchronization signal block based on the configuration information of the on-demand common downlink signal / channel. Alternatively, the terminal device may obtain the on-demand synchronization signal block based on the configuration information of the on-demand common downlink signal / channel and the validity information of the on-demand common downlink signal / channel.

[0252] In specific applications, it can be known that one of the prerequisites for the terminal device to send and receive data on the candidate cell is that the terminal device and the candidate cell have achieved downlink synchronization. Specifically, the terminal device can adjust the timing and frequency based on the on-demand public downlink signal / channel sent by the network device, so as to maintain consistency with the timing and frequency of the base station. The purpose of "downlink synchronization" here is for the terminal device to send and receive data, so it belongs to "precise downlink synchronization". In order to save space, "downlink synchronization" is equivalent to "precise downlink synchronization" unless otherwise specified.

[0253] In a multi-carrier scenario, generally speaking, the antenna of the serving cell and the antenna of the candidate cell are not co-located. Therefore, for the terminal device, the propagation delay between the serving cell and the candidate cell is large, and therefore the timing deviation between the serving cell and the candidate cell is also large.

[0254] In a specific implementation, the on-demand synchronization signal can be a reference signal for the terminal device to perform downlink synchronization on the candidate cell. When the timing deviation between the serving cell and the candidate cell is large, the terminal device can obtain downlink timing synchronization through the on-demand synchronization signal block. Thus, the terminal device can achieve downlink synchronization with the candidate cell through on-demand information.

[0255] In a specific implementation, the terminal device can perform measurements (such as heterodyne measurements) based on the received on-demand synchronization signal blocks, improve the measurement accuracy (such as beam-level measurement accuracy), and report the measurement results to the network device.

[0256] The measurement result may include an identity or identification or index of a candidate cell, such as an identity or index of a candidate cell recommended by the terminal device, or an identity or index of a candidate cell considered the strongest by the terminal device (such as a candidate cell with the largest measurement value).

[0257] The measurement result may include measurement values, such as Reference Signal Receiving Power (RSRP) and Signal to Interference-Noise Ratio (SINR). The measurement value may be the measurement value of one or more on-demand synchronization signal blocks, or the maximum value of the measurement values ​​of multiple on-demand synchronization signal blocks, or the average (such as linear average) of the measurement values ​​of multiple on-demand synchronization signal blocks. A measurement value may be for a candidate cell.

[0258] The measurement result may include the index of the on-demand synchronization signal block, such as the index of the on-demand synchronization signal block recommended by the terminal device, the index of the on-demand synchronization signal block considered the strongest by the terminal device (such as the on-demand synchronization signal block with the largest measurement value). The index of an on-demand synchronization signal block may be for a candidate cell.

[0259] The measurement results may include the index of the beam, such as the index of the beam recommended by the terminal device, the index of the beam that the terminal device considers to be the strongest (such as the beam with the largest measurement value). The index of a beam may be for a candidate cell. A beam may be a beam corresponding to multiple on-demand synchronization signal blocks, and the terminal device selects a beam corresponding to (or associated with or mapped to) multiple on-demand synchronization signal blocks through a codebook. Specifically, the indexes of multiple on-demand synchronization signal blocks may correspond to the index of a beam. This correspondence can be achieved through a codebook. Through the correspondence between the on-demand synchronization signal block and the beam, the number of beams can be made greater than the on-demand synchronization signal block, and the terminal device can report beam information that is finer than the on-demand synchronization signal block.

[0260] In an embodiment of the present invention, the configuration information of the on-demand common downlink signal / channel of the on-demand synchronization signal block may include any one or more of the frequency domain position of the on-demand synchronization signal block, the period of the on-demand synchronization signal block, the time domain offset of the on-demand synchronization signal block, the actual sending position of the on-demand synchronization signal block, etc.

[0261] In some embodiments, the on-demand synchronization signal block includes the frequency domain position of the on-demand synchronization signal block, the period of the on-demand synchronization signal block, the time domain offset of the on-demand synchronization signal block, and the actual sending position of the on-demand synchronization signal block.

[0262] In specific applications, the frequency domain position of the on-demand synchronization signal block can be an absolute frequency domain position or a relative frequency position relative to a certain reference frequency point. The period and time domain offset of the on-demand synchronization signal block can characterize the time position of the repeated occurrence of the on-demand synchronization signal block in the time domain. The actual sending position of the on-demand synchronization signal block can refer to the event position of the actual sending of the on-demand synchronization signal within a time period, such as the time position of the actual sending of the on-demand synchronization signal block within 5ms, which can be identified by a bitmap, such as the ssb-PositionslnBurst parameter in the protocol.

[0263] In some embodiments, the on-demand synchronization signal block may be equivalent to a synchronization signal block burst, and all on-demand synchronization signal blocks within a time period, such as all on-demand synchronization signal blocks within 5 ms.

[0264] In a specific implementation, the validity information of the on-demand common downlink signal / channel may include the validity time of the on-demand synchronization signal block. If the validity time of the configuration information is configured, the on-demand synchronization signal block is valid within the validity time; otherwise, the on-demand synchronization signal block is not valid outside the validity time.

[0265] That is to say, if the effective time of the configuration information is configured, the on-demand synchronization signal block may not take effect immediately, but only take effect when the effective time is reached.

[0266] In some embodiments, the on-demand synchronization signal block is effective, which may mean that the on-demand synchronization signal block is enabled, or the on-demand synchronization signal block is activated. Accordingly, the on-demand synchronization signal block is not effective, which means that the on-demand synchronization signal block is not enabled, or the on-demand synchronization signal block is not activated.

[0267] In the embodiment of the present invention, the configuration information of the on-demand common downlink signal / channel may also include the sending window position of the on-demand synchronization signal block.

[0268] In some scenarios, the network device can configure the window for the terminal device to blindly detect the on-demand synchronization signal block by configuring the sending window of the on-demand synchronization signal block, that is, the network device can send the on-demand synchronization signal block at certain positions within the sending window, and the terminal device determines whether the on-demand synchronization signal block exists through blind detection. By configuring the sending window position, the time domain flexibility of the network device in sending the on-demand synchronization signal block can be improved.

[0269] In some embodiments, the transmission window of the on-demand synchronization signal block may be a discovery burst transmission window (DBTW).

[0270] Accordingly, the validity information of the on-demand common downlink signal / channel may include the validity time of the sending window of the on-demand synchronization signal block. The sending window is valid within the validity time of the sending window; the sending window is not valid outside the validity time of the sending window.

[0271] That is to say, although the sending window position of the on-demand synchronization signal block is configured, the sending window does not take effect immediately, but may take effect after a certain period of time.

[0272] The sending window is effective, which can be understood as the sending window is enabled or activated. Correspondingly, the sending window is not effective, which can be understood as the sending window is not enabled or the sending window is not activated.

[0273] In the embodiment of the present invention, the configuration information of the on-demand common uplink signal / channel includes the configuration information of the on-demand random access resource. The terminal device can send the PRACH to the candidate cell according to the configuration information of the on-demand random access resource.

[0274] In some embodiments, the on-demand random access resource may be an on-demand random access resource of a candidate cell.

[0275] In an embodiment of the present invention, the terminal device may send PRACH to the candidate cell according to the configuration information of the on-demand common uplink signal / channel. Alternatively, the terminal device may send PRACH to the candidate cell according to the configuration information of the on-demand common uplink signal / channel and the effectiveness information of the on-demand common uplink signal / channel. In specific applications, it can be known that another prerequisite for the terminal device to be able to send and receive data on the candidate cell is that the terminal device and the candidate cell have achieved uplink synchronization. Specifically, the network device can determine the timing advance (TimingAdvance, TA) of the terminal device through the on-demand common uplink signal / channel, and inform the terminal device to use the TA to adjust the transmission time. PRACH is a signal / channel for the terminal device to perform uplink synchronization on the candidate cell. When the timing deviation between the serving cell and the candidate cell is large, the network device can obtain uplink timing synchronization through PRACH. As a result, the terminal device can achieve uplink synchronization with the network device through on-demand information.

[0276] In a specific implementation, the terminal device can send PRACH to all candidate cells so that all candidate cells can obtain the TA of the terminal device. That is, the network device configures the on-demand common uplink signals / channels of the candidate cells, and the terminal device sends PRACH to all configured candidate cells.

[0277] For example, the network device configures the on-demand common uplink signals / channels of candidate cells 1 to 4 for terminal device A. Terminal device A sends PRACH to candidate cells 1 to 4.

[0278] In a specific implementation, the terminal device may also send PRACH to some candidate cells (also referred to as a subset of candidate cells) so that some candidate cells can obtain the TA of the terminal device. The network device may subsequently switch the terminal device to a candidate cell among the above-mentioned candidate cells.

[0279] For example, the network device configures the on-demand common uplink signal / channel of candidate cells 1 to 6 for terminal device A. Terminal device A sends PRACH to candidate cells 1 to 4. In the subsequent cell switching process, the network device switches the terminal device to one of candidate cells 1 to 4.

[0280] In the embodiment of the present invention, the configuration information of the on-demand common uplink signal / channel may include: configuration information of on-demand random access (Random Access, RA) resources.

[0281] In the embodiment of the present invention, the configuration information of the on-demand random access resource may include: configuration information of the contention-based random access resource.

[0282] In a specific implementation, the contention-based random access resource may be equivalent to a common RACH resource. The network device may configure the contention-based random access resource used by the terminal device to reduce system overhead.

[0283] Accordingly, the validity information of the on-demand common uplink signal / channel may include the validity time of the CBRA resource. The validity of the CBRA resource means that the CBRA resource is enabled or activated. The ineffectiveness of the CBRA resource means that the CBRA resource is not enabled or activated, that is, the CBRA resource is not available.

[0284] That is to say, although the CBRA resources are configured, they are effective only during the effective time and are not effective outside the effective time.

[0285] In the embodiment of the present invention, the configuration information of the on-demand random access resource may include: configuration information of the contention free random access (Contention Free Random Access, CFRA) resource.

[0286] In a specific implementation, the contention-free random access resource may be equivalent to a dedicated RACH resource. The network device may configure the terminal device to use the CFRA resource to improve the efficiency of successfully establishing uplink synchronization.

[0287] Accordingly, the validity information of the on-demand common uplink signal / channel may include the validity time of the CFRA resource. The validity of the CFRA resource means that the CFRA resource is enabled or activated. The ineffectiveness of the CBFA resource means that the CFRA resource is not enabled or activated, that is, the CFRA resource is not available.

[0288] In the embodiment of the present invention, the configuration information of the on-demand common uplink signal / channel may further include selection information of CFRA resources.

[0289] In a specific implementation, the selection information of the CFRA resource may include one or more CFRA resources. For a CFRA resource, it may include a synchronization signal block index (SSB index) of an on-demand synchronization signal block, a random access preamble index (random access preamble index), and a physical random access channel mask index (PRACH maskindex). Alternatively, for a CFRA resource, it may include: a synchronization signal block index (SSBindex) of an on-demand synchronization signal block, and a physical random access channel mask index (PRACH maskindex).

[0290] In a specific implementation, the configuration information of the above-mentioned CFRA resources essentially includes a CFRA resource for an on-demand common uplink signal / channel process in a candidate cell. The above-mentioned CFRA resources for on-demand common uplink signals / channels may include PRACH opportunities (RACH time-frequency domain resources), preamble sequences (RACH code domain resources), and associated on-demand synchronization signal blocks. One CFRA resource may correspond to one beam. The network device may select one or more CFRA resources (corresponding to one or more beams) based on the beam-level measurement results reported by the terminal device, so that the terminal device can selectively send PRACH, thereby reducing the complexity of the terminal device and the network device.

[0291] Reference Figure 4 , another information acquisition method in an embodiment of the present invention is given, which is described in detail through specific steps below.

[0292] In the embodiment of the present invention, the information acquisition method provided in the following steps 401 to 402 can be executed by a chip (such as a baseband chip) with data processing capabilities in the terminal device, or by a chip module with data processing capabilities in the terminal device, or by the terminal device. The following is an explanation of the information acquisition method provided by the following steps 401 to 402 executed by the terminal device.

[0293] Step 401: Obtain a cell switching instruction from a message of a random access process.

[0294] Step 402: Switch to the target cell indicated by the cell switching instruction.

[0295] In the embodiment of the present invention, the network device may carry a cell switch instruction in Msg4 or MsgB, and the cell switch instruction is used to indicate the target cell. That is, Msg4 or MsgB may include the cell switch instruction.

[0296] The terminal device receives Msg4 or MsgB, determines to enter the connected state, and obtains the cell switching instruction from it. Based on the cell switching instruction, the terminal device switches to the target cell and sends and receives data on the target cell.

[0297] In some embodiments, Msg4 or MsgB includes an RRC setup message.

[0298] Thus, the terminal device can obtain the cell switching instruction from Msg4 or MsgB and switch to the target cell when the random access process is completed. It can be seen that the terminal device can send and receive data on the target cell as quickly as possible.

[0299] In the embodiment of the present invention, after the terminal device accesses the serving cell, the terminal device may send Msg5 to the network device. Msg5 includes an RRC establishment completion message, and Msg5 may also include the capabilities of the terminal device.

[0300] The network device receives Msg5 sent by the terminal device, and obtains the RRC establishment completion message and the capabilities reported by the terminal device. The network device can send Msg6 in the serving cell. Specifically, the network device can carry the cell switching instruction in Msg6. That is, Msg6 can include the cell switching instruction.

[0301] The terminal device receives Msg6 in the serving cell and obtains the cell switching instruction from Msg6. Based on the cell switching instruction, the terminal device switches to the target cell and transmits and receives data in the target cell.

[0302] In some embodiments, Msg6 may include an RRC reconfiguration message.

[0303] Thus, the terminal device can obtain the cell switching instruction from Msg6 and switch to the target cell, so the terminal device can send and receive data on the target cell as soon as possible.

[0304] In summary, the network device carries the cell switching instruction in the message of the random access process, so that the terminal device can switch to the target cell as soon as possible, and realize the terminal device to send and receive data in the target cell.

[0305] Reference Figure 5 , an information transmission method in an embodiment of the present invention is given, and the following is described in detail through specific steps.

[0306] In the embodiment of the present invention, the information transmission method provided in the following step 501 can be executed by a chip with data processing capability in the network device, or by a chip module with data processing capability in the network device, or by the network device. The following is an explanation of the information transmission method provided in the following step 501 performed by the network device.

[0307] Step 501, sending basic information.

[0308] In a specific implementation, the network device may send basic information to the candidate cells.

[0309] In the embodiment of the present invention, the basic information may include configuration information of a basic common downlink signal / channel and / or configuration information of a basic common uplink signal / channel.

[0310] In some embodiments, the basic information may include both configuration information of a basic common downlink signal / channel and configuration information of a basic common uplink signal / channel.

[0311] In some embodiments, the basic common downlink signal / channel may be a basic common downlink signal / channel of a candidate cell. The basic common uplink signal / channel may be a basic common uplink signal / channel of a candidate cell.

[0312] In some embodiments, the basic information may include both configuration information of a basic common downlink signal / channel and configuration information of a basic common uplink signal / channel.

[0313] In an embodiment of the present invention, the configuration information of the basic common downlink signal / channel may include configuration information of the basic synchronization signal block.

[0314] In some embodiments, the basic synchronization signal block may be a basic synchronization signal block of the candidate cell.

[0315] In an embodiment of the present invention, the basic synchronization signal block may be a synchronization signal block supporting fewer functions. For example, the basic synchronization signal block may support operations such as cell search, coarse downlink synchronization and / or measurement, but does not support operations such as fine downlink synchronization and cell selection / reselection. The basic synchronization signal block may also be referred to as a low complexity SSB or a reduced SSB.

[0316] Generally speaking, a synchronization signal block that supports operations such as precise downlink synchronization and / or cell selection / reselection may require the following characteristics: the beam of the synchronization signal block is finer to provide a larger beam gain; the period of the synchronization signal block is shorter to provide a sufficient number of signal samples; the synchronization signal block is associated with a system information block (SIB) for cell access during cell selection / reselection.

[0317] It is worth noting that in some scenarios (such as scenarios where reduced synchronization signal blocks are not used for network energy saving), the basic synchronization signal block can also support operations such as precise downlink synchronization and / or cell selection / reselection.

[0318] In a specific implementation, the basic synchronization signal block may also be a discovery reference signal.

[0319] In an embodiment of the present invention, the configuration information of the basic common uplink signal / channel may include the configuration information of the basic random access resource. The terminal device may use the basic random access resource to request more configuration information of the common downlink signal / channel, and / or, more configuration information of the common uplink signal / channel, so that the terminal device can access the candidate cell through the requested configuration information of more common uplink signals / channels, and then transmit and receive data in the candidate cell. In an embodiment of the present invention, the configuration information of more common downlink signals / channels may also be referred to as: configuration information of common downlink signals / channels on demand. The configuration information of more common uplink signals / channels may also be referred to as configuration information of common uplink signals / channels on demand.

[0320] In some embodiments, the basic random access resource may be a basic random access resource of a candidate cell. In a specific implementation, the terminal device may reside in a serving cell to obtain basic information.

[0321] The network device can send a system message to the terminal device, and the system message carries basic information. The terminal device obtains the basic information based on the received system message.

[0322] In some embodiments, basic information may be carried in the measurement information (such as inter-frequency measurement information) of the system message. The terminal device may obtain basic information from the measurement information (such as inter-frequency measurement information) of the system message. Generally speaking, the anchor cell and the non-anchor cell use different frequency points or frequency layers, and the system information already contains inter-frequency measurement information, so the above measurement information may use inter-frequency measurement information.

[0323] The network device carries the configuration information of the basic synchronization signal block in the measurement information (such as the inter-frequency measurement information), that is, the network device reuses the measurement information (such as the inter-frequency measurement information), which can save signaling overhead.

[0324] In a specific implementation, the terminal device can receive the basic synchronization signal block sent by the candidate cell, perform measurement (such as inter-frequency measurement), and report the measurement result to the network device during the random access process. The measurement result is described in the above step 101 and will not be repeated here.

[0325] It can be seen that the network device sends the configuration information of the basic synchronization signal block to the terminal device through the system message. The terminal device receives the system message and obtains the configuration information of the basic synchronization signal block from it. The terminal device performs measurement (such as inter-frequency measurement) based on the basic synchronization signal block sent by the candidate cell, and reports the measurement results to the network device during the random access process. In this way, the terminal device obtains basic information, and completes the operation of measuring the candidate cell and reporting the corresponding measurement results.

[0326] In an embodiment of the present invention, during the random access process, the network device may carry basic information in the random access response. Accordingly, the terminal device may receive the random access response and obtain basic information therefrom. The terminal device may perform measurements (such as inter-frequency measurements) based on the basic synchronization signal blocks sent by the candidate cell and report the measurement results to the network device.

[0327] Thus, only the terminal device that resides in the serving cell and initiates the random access process can obtain basic information. In other words, only the terminal device that resides in the serving cell and initiates the random access process can receive the basic synchronization signal block sent by the candidate cell and perform measurement (such as inter-frequency measurement) operations.

[0328] In a specific implementation, the network device can learn which candidate cells the terminal device may be in coverage of by measuring the PRACH sent by the terminal device. The network device can select some candidate cells to send basic synchronization signal blocks. In other words, not all candidate cells send basic synchronization signal blocks to the terminal device, thereby reducing the signaling overhead of the candidate cells.

[0329] For example, the candidate cells include candidate cells 1 to 6. The network device measures the PRACH sent by the terminal device and infers that the terminal device may be located within the coverage of candidate cells 1 and 2. The network device selects candidate cells 1 and 2 to send basic synchronization signal blocks.

[0330] Reference Figure 6 , another information transmission method in an embodiment of the present invention is given, which is described in detail through specific steps below.

[0331] In the embodiment of the present invention, the information transmission method provided in the following step 601 can be executed by a chip with data processing capability in the network device, or by a chip module with data processing capability in the network device, or by the network device. The following is an explanation of the information transmission method provided in the following step 601 executed by the network device.

[0332] Step 601, obtaining on-demand information capability.

[0333] In the embodiment of the present invention, the on-demand information capability may be used to indicate that the terminal device has the capability of obtaining on-demand information.

[0334] In the embodiment of the present invention, the on-demand information may include configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

[0335] In some embodiments, the on-demand information may include both configuration information of an on-demand common downlink signal / channel and configuration information of an on-demand common uplink signal / channel.

[0336] In some embodiments, the on-demand common downlink signal / channel may be an on-demand common downlink signal / channel of a candidate cell.

[0337] In the embodiment of the present invention, the on-demand information may further include validation information of an on-demand common downlink signal / channel and / or validation information of an on-demand common uplink signal / channel.

[0338] Specifically, if the on-demand information includes configuration information of the on-demand common downlink signal / channel, the on-demand information may also include validation information of the on-demand common downlink signal / channel. If the on-demand information includes configuration information of the on-demand common uplink signal / channel, the on-demand information may also include validation information of the on-demand common uplink signal / channel.

[0339] In other words, the above-mentioned validation information of the on-demand common downlink signal / channel and the validation information of the on-demand common uplink signal / channel are optional items in the on-demand information.

[0340] In an embodiment of the present invention, if the terminal device has the ability to obtain on-demand information, the terminal device can report the on-demand information capability through the physical random access channel (PRACH), and the on-demand information capability can be used to indicate that the terminal device has the ability to obtain on-demand information through a random access response (RAR).

[0341] The network device can determine whether the terminal device has reported the on-demand information capability based on the received PRACH. If the network device obtains the on-demand information capability from the PRACH, it can be determined that the terminal device has the capability to obtain on-demand information through the RAR.

[0342] Therefore, in the serving cell, the terminal device can inform the network device that it has the ability to obtain on-demand information through RAR through Msg1 or MsgA in the random access process. Based on the on-demand information capability reported by the terminal device, the network device can send the on-demand information in RAR accordingly. When the terminal device receives RAR, it can obtain the on-demand information from it and then use the on-demand information.

[0343] The terminal device reports the on-demand information capability via PRACH, so the network device can learn as soon as possible that the terminal device has the ability to obtain on-demand information. As a result, the network device can send the on-demand information to the terminal device as soon as possible (via RAR), so that the terminal device can obtain and use the on-demand information as soon as possible.

[0344] In addition, the network device can also determine which candidate cells the terminal device may be located in by measuring the PRACH, so that the candidate cells do not need to send basic synchronization signal blocks to the terminal device.

[0345] In the embodiment of the present invention, if the terminal device has the capability of obtaining on-demand information, the terminal device may report the on-demand information capability through Msg3 or MsgA. The on-demand information capability may be used to indicate that the terminal device has the capability of obtaining on-demand information through Msg4 or MsgB.

[0346] The network device can determine whether the terminal device has reported the on-demand information capability based on the received Msg3 or MsgA. If the network device determines that the terminal device has reported the on-demand information capability based on Msg3 or MsgA, it can be determined that the terminal device has the ability to obtain on-demand information through Msg4 or MsgB. The network device can send on-demand information to the terminal device through Msg4 or MsgB.

[0347] Therefore, in the serving cell, the terminal device can inform the network device that it has the ability to obtain on-demand information through Msg4 or MsgB through Msg3 or MsgA in the random access process. Based on the on-demand information capability reported by the terminal device, the network device can send the on-demand information in Msg4 or MsgB accordingly. When the terminal device receives Msg4 or MsgB, it can obtain the on-demand information from it and then use the on-demand information.

[0348] The terminal device reports the on-demand information capability through Msg3 or MsgA, so the network device can learn as soon as possible that the terminal device has the ability to obtain on-demand information. Furthermore, the network device can send on-demand information to the terminal device as soon as possible (through Msg4 or MsgB), so that the terminal device can obtain and use the on-demand information as soon as possible.

[0349] Compared with PRACH, Msg3 or MsgA can carry more bits of information.

[0350] In a specific implementation, measurement information of the terminal device may also be reported in Msg3 or MsgA. Based on the measurement information in Msg3 or MsgA, the network device can learn which candidate cells the terminal device is within coverage of.

[0351] In some embodiments, the terminal device may obtain a basic synchronization signal block sent by the candidate cell. Based on the basic synchronization signal block sent by the candidate cell, the terminal device performs a measurement operation on the candidate cell to obtain a measurement result corresponding to each candidate cell.

[0352] Specifically, different candidate cells may send basic synchronization signals to the terminal device respectively, so that the terminal device can measure and obtain measurement results corresponding to different candidate cells.

[0353] The measurement information reported by the terminal device through Msg3 or MsgA may include the measurement result of at least one candidate cell. Specifically, the terminal device may report the measurement results of all candidate cells through Msg3 or MsgA. Alternatively, the terminal device may report the measurement results of some candidate cells through Msg3 or MsgA.

[0354] The network device may obtain the measurement result of at least one candidate cell according to Msg3 or MsgA reported by the terminal device. The network device may select any one or more of a suitable candidate cell, a basic synchronization signal block corresponding to the candidate cell, a random access (RACH) resource, etc. according to the measurement result of at least one candidate cell.

[0355] Reference Figure 7 , another information transmission method in an embodiment of the present invention is given, which is described in detail through specific steps below.

[0356] In the embodiment of the present invention, the information transmission method provided in the following step 701 can be executed by a chip with data processing capability in the network device, or by a chip module with data processing capability in the network device, or by the network device. The following is an explanation of the information transmission method provided by the following step 701 executed by the network device.

[0357] Step 701, sending on-demand information.

[0358] In the embodiment of the present invention, the on-demand information may include configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

[0359] In some embodiments, the on-demand information may include both configuration information of an on-demand common downlink signal / channel and configuration information of an on-demand common uplink signal / channel.

[0360] In some embodiments, the on-demand common downlink signal / channel may be an on-demand common downlink signal / channel of a candidate cell. The on-demand common uplink signal / channel may be an on-demand common uplink signal / channel of a candidate cell.

[0361] In the embodiment of the present invention, the on-demand information may further include validation information of an on-demand common downlink signal / channel and / or validation information of an on-demand common uplink signal / channel.

[0362] Specifically, if the on-demand information includes configuration information of the on-demand common downlink signal / channel, the on-demand information may also include validation information of the on-demand common downlink signal / channel. If the on-demand information includes configuration information of the on-demand common uplink signal / channel, the on-demand information may also include validation information of the on-demand common uplink signal / channel.

[0363] In other words, the above-mentioned validation information of the on-demand common downlink signal / channel and the validation information of the on-demand common uplink signal / channel are optional items in the on-demand information.

[0364] In the embodiment of the present invention, the network device can know in advance whether the terminal device has the ability to receive on-demand information. Specifically, the terminal device can report the on-demand information capability to the network device to indicate that it has the ability to receive on-demand information.

[0365] In the embodiment of the present invention, the network device determines that the terminal device has the ability to receive on-demand information. If the terminal device sends the on-demand information capability through Msg1 or MsgA, the network device can send the on-demand information through the random access response. Accordingly, the terminal device obtains the on-demand information from the received random access response.

[0366] Therefore, in the serving cell, the terminal device can send the on-demand information capability through Msg1 or MsgA, and the network device can send the on-demand information through Msg2 or MsgB. Therefore, the network device can send the on-demand information to the terminal device as soon as possible, that is, the terminal device can obtain the on-demand information as soon as possible, and then use the on-demand common uplink signal / channel of the candidate cell, and / or, the on-demand common downlink signal / channel of the candidate cell.

[0367] If the terminal device sends the on-demand information capability through Msg3 or MsgA, the network device can send the on-demand information through Msg4 or MsgB. Accordingly, the terminal device obtains the on-demand information from the received Msg4 or MsgB.

[0368] In the serving cell, the terminal device can send the on-demand information capability through Msg3 or MsgA, and the network device can send the on-demand information through Msg4 or MsgB. As a result, the network device can send the on-demand information to the terminal device as soon as possible, that is, the terminal device can obtain the on-demand information as soon as possible, and then use the on-demand common uplink signal / channel of the candidate cell, and / or, the on-demand common downlink signal / channel of the candidate cell.

[0369] In the embodiment of the present invention, the configuration information of the on-demand common downlink signal / channel may include the configuration information of the on-demand synchronization signal block. The on-demand synchronization signal block may be a synchronization signal block defined in the existing protocol, which can be used for measurement, synchronization, cell search and other operations.

[0370] In a specific implementation, the terminal device can obtain an on-demand synchronization signal block based on the received on-demand information.

[0371] Specifically, the terminal device may obtain the on-demand synchronization signal block based on the configuration information of the on-demand common downlink signal / channel. Alternatively, the terminal device may obtain the on-demand synchronization signal block based on the configuration information of the on-demand common downlink signal / channel and the validity information of the on-demand common downlink signal / channel.

[0372] In some embodiments, the on-demand synchronization signal block may be an on-demand synchronization signal block of a candidate cell.

[0373] In specific applications, it can be known that one of the prerequisites for the terminal device to send and receive data on the candidate cell is that the terminal device and the candidate cell have achieved downlink synchronization. Specifically, the terminal device can adjust the timing and frequency based on the on-demand public downlink signal / channel sent by the network device, thereby maintaining the consistency of timing and frequency with the base station.

[0374] In a multi-carrier scenario, generally speaking, the antenna of the serving cell and the antenna of the candidate cell are not co-located. Therefore, for the terminal device, the propagation delay between the serving cell and the candidate cell is large, and therefore the timing deviation between the serving cell and the candidate cell is also large.

[0375] In a specific implementation, the on-demand synchronization signal can be a reference signal for the terminal device to perform downlink synchronization on the candidate cell. When the timing deviation between the serving cell and the candidate cell is large, the terminal device can obtain downlink timing synchronization through the on-demand synchronization signal block. Thus, the terminal device can achieve downlink synchronization with the candidate cell through on-demand information.

[0376] In an embodiment of the present invention, the configuration information of the on-demand common downlink signal / channel of the on-demand synchronization signal block may include any one or more of the frequency domain position of the on-demand synchronization signal block, the period of the on-demand synchronization signal block, the time domain offset of the on-demand synchronization signal block, the actual sending position of the on-demand synchronization signal block, etc.

[0377] In some embodiments, the on-demand synchronization signal block includes the frequency domain position of the on-demand synchronization signal block, the period of the on-demand synchronization signal block, the time domain offset of the on-demand synchronization signal block, and the actual sending position of the on-demand synchronization signal block.

[0378] In specific applications, the frequency domain position of the on-demand synchronization signal block can be an absolute frequency domain position or a relative frequency position relative to a certain reference frequency point. The period and time domain offset of the on-demand synchronization signal block can characterize the time position of the repeated occurrence of the on-demand synchronization signal block in the time domain. The actual sending position of the on-demand synchronization signal block can refer to the event position of the actual sending of the on-demand synchronization signal within a time period, such as the time position of the actual sending of the on-demand synchronization signal block within 5ms, which can be identified by a bitmap, such as the ssb-PositionslnBurst parameter in the protocol.

[0379] In some embodiments, the on-demand synchronization signal block may be equivalent to a synchronization signal block burst, and all on-demand synchronization signal blocks within a time period, such as all on-demand synchronization signal blocks within 5 ms.

[0380] In a specific implementation, the validity information of the on-demand common downlink signal / channel may include the validity time of the on-demand synchronization signal block. If the validity time of the configuration information is configured, the on-demand synchronization signal block is valid within the validity time; otherwise, the on-demand synchronization signal block is not valid outside the validity time.

[0381] That is to say, if the effective time of the configuration information is configured, the on-demand synchronization signal block may not take effect immediately, but only take effect when the effective time is reached.

[0382] In some embodiments, the on-demand synchronization signal block is effective, which may mean that the on-demand synchronization signal block is enabled, or the on-demand synchronization signal block is activated. Accordingly, the on-demand synchronization signal block is not effective, which means that the on-demand synchronization signal block is not enabled, or the on-demand synchronization signal block is not activated.

[0383] In the embodiment of the present invention, the configuration information of the on-demand common downlink signal / channel may also include the sending window position of the on-demand synchronization signal block.

[0384] In some scenarios, the network device can configure the window for the terminal device to blindly detect the on-demand synchronization signal block by configuring the sending window of the on-demand synchronization signal block, that is, the network device can send the on-demand synchronization signal block at certain positions within the sending window, and the terminal device determines whether the on-demand synchronization signal block exists through blind detection. By configuring the sending window position, the time domain flexibility of the network device in sending the on-demand synchronization signal block can be improved.

[0385] In some embodiments, the sending window of the on-demand synchronization signal block can be a discovery burst sending window.

[0386] Accordingly, the validity information of the on-demand common downlink signal / channel may include the validity time of the sending window of the on-demand synchronization signal block. The sending window is valid within the validity time of the sending window; the sending window is not valid outside the validity time of the sending window.

[0387] That is to say, although the sending window position of the on-demand synchronization signal block is configured, the sending window does not take effect immediately, but may take effect after a certain period of time.

[0388] The sending window is effective, which can be understood as the sending window is enabled or activated. Correspondingly, the sending window is not effective, which can be understood as the sending window is not enabled or the sending window is not activated.

[0389] In an embodiment of the present invention, the terminal device may send PRACH to the candidate cell according to the configuration information of the on-demand public uplink signal / channel of the candidate cell. Alternatively, the terminal device may send PRACH to the candidate cell according to the configuration information of the on-demand public uplink signal / channel of the candidate cell and the validation information of the on-demand public uplink signal / channel.

[0390] In specific applications, it can be known that another prerequisite for the terminal device to send and receive data on the candidate cell is that the terminal device and the candidate cell have achieved uplink synchronization. Specifically, the network device can determine the TA of the terminal device through the on-demand public uplink signal / channel, and inform the terminal device to use the TA to adjust the transmission time. PRACH is the signal / channel for the terminal device to perform uplink synchronization on the candidate cell. When the timing deviation between the serving cell and the candidate cell is large, the network device can obtain uplink timing synchronization through PRACH. As a result, the terminal device can achieve uplink synchronization with the network device through on-demand information.

[0391] In a specific implementation, the terminal device can send PRACH to all candidate cells so that all candidate cells can obtain the TA of the terminal device. That is, the network device configures the on-demand common uplink signals / channels of the candidate cells, and the terminal device sends PRACH to all configured candidate cells.

[0392] For example, the network device configures the on-demand common uplink signals / channels of candidate cells 1 to 4 for terminal device A. Terminal device A sends PRACH to candidate cells 1 to 4.

[0393] In a specific implementation, the terminal device may also send PRACH to some candidate cells (also referred to as a subset of candidate cells) so that some candidate cells can obtain the TA of the terminal device. The network device may subsequently switch the terminal device to a candidate cell among the above-mentioned candidate cells.

[0394] For example, the network device configures the on-demand common uplink signal / channel of candidate cells 1 to 6 for terminal device A. Terminal device A sends PRACH to candidate cells 1 to 4. In the subsequent cell switching process, the network device switches the terminal device to one of candidate cells 1 to 4.

[0395] In the embodiment of the present invention, the configuration information of the on-demand common uplink signal / channel may include: configuration information of CBRA resources.

[0396] In a specific implementation, the contention-based random access resource may be equivalent to a public RACH resource. The network device may configure the contention-based random access resource used by the terminal device to reduce system overhead.

[0397] Accordingly, the validity information of the on-demand common uplink signal / channel may include the validity time of the CBRA resource. The validity of the CBRA resource means that the CBRA resource is enabled or activated. The ineffectiveness of the CBRA resource means that the CBRA resource is not enabled or activated, that is, the CBRA resource is not available.

[0398] That is to say, although the CBRA resources are configured, they are effective only during the effective time and are not effective outside the effective time.

[0399] In the embodiment of the present invention, the configuration information of the on-demand common uplink signal / channel may also include configuration information of CFRA resources.

[0400] In a specific implementation, the contention-free random access resource may be equivalent to a dedicated RACH resource. The network device may configure the terminal device to use the CFRA resource to improve the efficiency of successfully establishing uplink synchronization.

[0401] Accordingly, the validity information of the on-demand common uplink signal / channel may include the validity time of the CFRA resource. The validity of the CFRA resource means that the CFRA resource is enabled or activated. The ineffectiveness of the CBFA resource means that the CFRA resource is not enabled or activated, that is, the CFRA resource is not available.

[0402] In the embodiment of the present invention, the configuration information of the on-demand common uplink signal / channel may further include selection information of CFRA resources.

[0403] In a specific implementation, the selection information of the CFRA resource may include one or more CFRA resources. For a CFRA resource, it may include a synchronization signal block index of an on-demand synchronization signal block, a random access preamble index, and a physical random access channel mask index. Alternatively, for a CFRA resource, it may include: a synchronization signal block index of an on-demand synchronization signal block, and a physical random access channel mask index.

[0404] In a specific implementation, the configuration information of the above-mentioned CFRA resources essentially includes a CFRA resource for an on-demand common uplink signal / channel process in a candidate cell. The above-mentioned CFRA resources for on-demand common uplink signals / channels may include PRACH opportunities (RACH time-frequency domain resources), preamble sequences (RACH code domain resources), and associated on-demand synchronization signal blocks. One CFRA resource may correspond to one beam. The terminal device may select one or more CFRA resources (corresponding to one or more beams) based on the beam-level measurement results reported by the terminal device, so that the terminal device can selectively send PRACH, thereby reducing the complexity of the terminal device and the network device.

[0405] Reference Figure 8 , another information transmission method in an embodiment of the present invention is given, which is described in detail through specific steps below.

[0406] In the embodiment of the present invention, the information transmission method provided in the following step 801 can be executed by a chip with data processing capability in the network device, or by a chip module with data processing capability in the network device, or by the network device. The following is an explanation of the information transmission method provided in the following step 801 executed by the network device.

[0407] Step 801: Send a message of a random access process.

[0408] In the embodiment of the present invention, the network device may carry a cell switching instruction in Msg4 or MsgB, and the cell switching instruction is used to indicate a target cell. That is, Msg4 or MsgB may include a cell switching instruction.

[0409] The terminal device receives Msg4 or MsgB, determines to enter the connected state, and obtains the cell switching instruction from it. Based on the cell switching instruction, the terminal device switches to the target cell and sends and receives data on the target cell.

[0410] In some embodiments, Msg4 or MsgB includes an RRC setup message.

[0411] Thus, the terminal device can obtain the cell switching instruction from Msg4 or MsgB and switch to the target cell when the random access process is completed. It can be seen that the terminal device can send and receive data on the target cell as quickly as possible.

[0412] In the embodiment of the present invention, after the terminal device accesses the serving cell, the terminal device may send Msg5 to the network device. Msg5 includes an RRC establishment completion message, and Msg5 may also include the capabilities of the terminal device.

[0413] The network device receives Msg5 sent by the terminal device, and obtains the RRC establishment completion message and the capabilities reported by the terminal device. The network device can send Msg6 in the serving cell. Specifically, the network device can carry the cell switching instruction in Msg6. That is, Msg6 can include the cell switching instruction.

[0414] The terminal device receives Msg6 in the serving cell and obtains the cell switching instruction from Msg6. Based on the cell switching instruction, the terminal device switches to the target cell and sends and receives data in the target cell.

[0415] In some embodiments, Msg6 may include an RRC reconfiguration message.

[0416] Thus, the terminal device can obtain the cell switching instruction from Msg6 and switch to the target cell, so the terminal device can send and receive data on the target cell as soon as possible.

[0417] In summary, the network device carries the cell switching instruction in the message of the random access process, so that the terminal device can switch to the target cell as soon as possible, and realize the terminal device to send and receive data in the target cell.

[0418] Reference Fig. 9 The present invention provides an information acquisition device 90, comprising: an acquisition unit 901, used to acquire basic information.

[0419] In a specific implementation, the specific execution process of the acquisition unit 901 may correspond to step 101 and will not be described in detail here.

[0420] In a specific implementation, the above-mentioned information acquisition device 90 may correspond to a chip with a data processing function in a terminal device, or to a chip module with a data processing function in a terminal device, or to a terminal device.

[0421] Reference Fig.10 The present invention provides another information acquisition device 100, including: a reporting unit 1001, used to report on-demand information capability, the on-demand information capability indicates the ability to obtain on-demand information, the on-demand information includes the configuration information of the on-demand common downlink signal / channel of the candidate cell, and / or, the configuration information of the on-demand common uplink signal / channel of the candidate cell.

[0422] In some embodiments, the configuration information of the on-demand common downlink signal / channel may be the configuration information of the on-demand common downlink signal / channel of the candidate cell. The configuration information of the on-demand common uplink signal / channel may be the configuration information of the on-demand common uplink signal / channel of the candidate cell.

[0423] In a specific implementation, the specific execution process of the above-mentioned acquisition unit 1001 can correspond to step 201, which will not be repeated here.

[0424] In a specific implementation, the above-mentioned information acquisition device 100 may correspond to a chip with a data processing function in a terminal device, or to a chip module with a data processing function in a terminal device, or to a terminal device.

[0425] Reference Fig.11 The present invention provides another information acquisition device 11, comprising: an acquisition unit 111, used to acquire on-demand information, wherein the on-demand information includes configuration information of an on-demand common downlink signal / channel, and / or configuration information of an on-demand common uplink signal / channel.

[0426] In some embodiments, the configuration information of the on-demand common downlink signal / channel may be the configuration information of the on-demand common downlink signal / channel of the candidate cell. The configuration information of the on-demand common uplink signal / channel may be the configuration information of the on-demand common uplink signal / channel of the candidate cell.

[0427] In a specific implementation, the specific execution process of the acquisition unit 111 may correspond to step 301 and will not be described in detail here.

[0428] In a specific implementation, the above-mentioned information acquisition device 11 may correspond to a chip with a data processing function in a terminal device, or to a chip module with a data processing function in a terminal device, or to a terminal device.

[0429] Reference Fig.12 The present invention provides another information acquisition device 12, comprising: an acquisition unit 121, configured to acquire a cell switching instruction from a message of a random access process, and switch to a target cell indicated by the cell switching instruction.

[0430] In a specific implementation, the specific execution process of the acquisition unit 121 may correspond to step 401 and step 402, which will not be described in detail here.

[0431] In a specific implementation, the above-mentioned information acquisition device 12 may correspond to a chip with a data processing function in a terminal device, or to a chip module with a data processing function in a terminal device, or to a terminal device.

[0432] Reference Fig.13 , an information transmission device 13 in an embodiment of the present invention is given, including: a sending unit 131, used to send basic information.

[0433] In a specific implementation, the specific execution process of the sending unit 131 may correspond to step 501 and will not be described in detail here.

[0434] In a specific implementation, the above-mentioned information transmission device 13 may correspond to a chip with a data processing function in a network device, or to a chip module with a data processing function in a network device, or to a network device.

[0435] Reference Fig.14 , another information transmission device 14 in an embodiment of the present invention is given, including: an acquisition unit 141, used to obtain on-demand information capability, the on-demand information capability indicates the ability to obtain on-demand information, the on-demand information includes configuration information of on-demand common downlink signals / channels, and / or, configuration information of on-demand common uplink signals / channels.

[0436] In some embodiments, the configuration information of the on-demand common downlink signal / channel may be the configuration information of the on-demand common downlink signal / channel of the candidate cell. The configuration information of the on-demand common uplink signal / channel may be the configuration information of the on-demand common uplink signal / channel of the candidate cell.

[0437] In a specific implementation, the specific execution process of the acquisition unit 141 may correspond to step 601 and will not be described in detail here.

[0438] In a specific implementation, the above-mentioned information transmission device 14 may correspond to a chip with a data processing function in a network device, or to a chip module with a data processing function in a network device, or to a network device.

[0439] Reference Fig.15 , another information transmission device 15 in an embodiment of the present invention is provided, comprising: a sending unit 151, used to send on-demand information, the on-demand information including configuration information of on-demand common uplink and downlink signals / channels, and / or, validation information of the on-demand common uplink and downlink signals / channels.

[0440] In some embodiments, the configuration information of the on-demand common downlink signal / channel may be the configuration information of the on-demand common downlink signal / channel of the candidate cell. The configuration information of the on-demand common uplink signal / channel may be the configuration information of the on-demand common uplink signal / channel of the candidate cell.

[0441] In a specific implementation, the specific execution process of the above-mentioned sending unit 151 can correspond to step 701, which will not be repeated here.

[0442] In a specific implementation, the above-mentioned information transmission device 15 can correspond to a chip with a data processing function in a network device, or corresponds to a chip module with a data processing function in a network device, or corresponds to a network device.

[0443] Reference Fig.16 , another information transmission device 16 in an embodiment of the present invention is provided, comprising: a sending unit 161, configured to send a message of a random access process, wherein the message of the random access process includes a cell switching instruction.

[0444] In a specific implementation, the specific execution process of the sending unit 161 may correspond to step 801 and will not be described in detail here.

[0445] In a specific implementation, the above-mentioned information transmission device 16 may correspond to a chip with a data processing function in a network device, or to a chip module with a data processing function in a network device, or to a network device.

[0446] In a specific implementation, each module / unit included in each device or product described in the above embodiments may be a software module / unit or a hardware module / unit, or may be partly a software module / unit and partly a hardware module / unit.

[0447] For example, for each device or product applied to or integrated in a chip, each module / unit contained therein may be implemented in the form of hardware such as circuits, or at least some of the modules / units may be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules / units may be implemented in the form of hardware such as circuits; for each device or product applied to or integrated in a chip module, each module / unit contained therein may be implemented in the form of hardware such as circuits, and different modules / units may be located in the same component (such as a chip, circuit module, etc.) or different components of the chip module, or at least some of the modules / units may be implemented in the form of software programs. The element can be implemented in the form of a software program, which runs on a processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in the terminal, the various modules / units contained therein can be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal, or, at least some modules / units can be implemented in the form of a software program, which runs on a processor integrated inside the terminal, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits.

[0448] An embodiment of the present invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the information acquisition method provided in any of the above embodiments are executed.

[0449] An embodiment of the present invention also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the information transmission method provided in any of the above embodiments are executed.

[0450] An embodiment of the present invention further provides an information acquisition device, including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the steps of the information acquisition method provided in any of the above embodiments when running the computer program.

[0451] An embodiment of the present invention further provides an information transmission device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the steps of the information transmission method provided in any of the above embodiments when running the computer program.

[0452] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing the relevant hardware through a program, and the program may be stored in a computer-readable storage medium, which may include: ROM, RAM, disk or CD, etc.

[0453] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A method for obtaining information, It is characterized in that include: Get basic information.

2. The information acquisition method according to claim 1, It is characterized in that The basic information obtained includes: Get system messages; The basic information is obtained from the system message.

3. The information acquisition method according to claim 2, wherein the basic information is acquired from the system message. include: The basic information is acquired from the measurement information of the system message.

4. The information acquisition method according to claim 1, It is characterized in that The basic information obtained includes: receiving a random access response; The basic information is acquired from the random access response.

5. The information acquisition method according to any one of claims 1 to 4, It is characterized in that The basic information includes: configuration information of a basic common downlink signal / channel, and / or configuration information of a basic common uplink signal / channel.

6. The information acquisition method according to claim 5, It is characterized in that The configuration information of the basic common downlink signal / channel includes: configuration information of the basic synchronization signal block.

7. The information acquisition method according to claim 6, It is characterized in that The basic synchronization signal block includes at least one of the following: a discovery reference signal, a reduced synchronization signal block.

8. The information acquisition method according to claim 5, It is characterized in that The configuration information of the basic common uplink signal / channel includes: configuration information of basic random access resources.

9. The information acquisition method according to claim 7, It is characterized in that The configuration information of the basic random access resource includes at least one of the following: configuration information of contention-based random access resources and configuration information of contention-free random access resources.

10. A method for obtaining information, It is characterized in that include: Reporting on-demand information capability, where the on-demand information capability indicates the ability to obtain on-demand information, where the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

11. The information acquisition method according to claim 10, It is characterized in that The on-demand information further includes: validation information of the on-demand common downlink signal / channel, and / or validation information of the on-demand common uplink signal / channel.

12. The information acquisition method according to claim 10 or 11, It is characterized in that The on-demand information capability indicates the ability to obtain the on-demand information through a random access response; the reporting of the on-demand information capability includes: using a physical random access channel to report the on-demand information capability.

13. The information acquisition method according to claim 10 or 11, It is characterized in that The on-demand information capability indicates the capability of obtaining the on-demand information through Msg4 or MsgB; the on-demand information reporting capability includes: the on-demand information reporting capability using Msg3 or MsgA.

14. The information acquisition method according to any one of claims 10 to 13, It is characterized in that Also includes: Report the measurement result of at least one candidate cell.

15. A method for obtaining information, It is characterized in that include: The on-demand information is acquired, where the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

16. The information acquisition method according to claim 15, It is characterized in that The on-demand information also includes: validation information of an on-demand common downlink signal / channel, and / or validation information of an on-demand common uplink signal / channel.

17. The information acquisition method according to claim 15 or 16, It is characterized in that The obtaining of on-demand information includes: acquiring the on-demand information from the received random access response; or, The on-demand information is obtained from the received Msg4 or MsgB.

18. The information acquisition method according to claim 15, It is characterized in that The configuration information of the on-demand common downlink signal / channel includes: Configuration information for the on-demand synchronization signal block.

19. The information acquisition method according to claim 18, It is characterized in that The configuration information of the on-demand synchronization signal block includes at least one of the following: The frequency domain position of the on-demand synchronization signal block, the period of the on-demand synchronization signal block, the time domain offset of the on-demand synchronization signal block, the actual sending position of the on-demand synchronization signal block, and the sending window position of the on-demand synchronization signal block.

20. The information acquisition method according to claim 15, It is characterized in that The validity information of the on-demand common downlink signal / channel includes: the validity time of the configuration information of the on-demand common downlink signal / channel.

21. The information acquisition method according to claim 15, It is characterized in that Also includes: The on-demand common downlink signal / channel is received according to the configuration information of the on-demand common downlink signal / channel.

22. The information acquisition method according to claim 15, It is characterized in that Also includes: A random access channel is sent to at least one of the candidate cells according to the configuration information of the on-demand common uplink signal / channel.

23. The information acquisition method according to claim 22, It is characterized in that The configuration information of the on-demand common uplink signal / channel includes: configuration information of on-demand random access resources.

24. The information acquisition method according to claim 23, It is characterized in that The configuration information of the on-demand random access resource includes at least one of the following: configuration information of contention-based random access resources and configuration information of contention-free random access resources.

25. The information acquisition method according to claim 24, It is characterized in that The validity information of the contention-based random access resource includes: the validity time of the contention-based random access resource.

26. The information acquisition method according to claim 24, It is characterized in that The validity information of the contention-free random access resource includes at least one of the following: the validity time of the contention-free random access resource and the selection information of the contention-free random access resource.

27. The information acquisition method according to claim 26, It is characterized in that The selection information of the contention-free random access resource includes at least one contention-free random access resource.

28. The information acquisition method according to claim 27, It is characterized in that The contention-free random access resources include: a synchronization signal block index, a random access preamble index, and a physical random access channel mask index; or the contention-free random access resources include: a synchronization signal block index and a physical random access channel mask index.

29. A method for obtaining information, It is characterized in that include: A cell switching instruction is obtained from a message of the random access process, and switching is performed to a target cell indicated by the cell switching instruction.

30. The information acquisition method according to claim 29, It is characterized in that The obtaining of a cell switching instruction from a message of a random access process includes: The cell switching instruction is obtained from Msg4 or MsgB.

31. The information acquisition method according to claim 29, It is characterized in that The obtaining of a cell switching instruction from a message of a random access process includes: The cell switching instruction is obtained from Msg6.

32. A method for transmitting information, It is characterized in that include: Send basic information.

33. A method for transmitting information, It is characterized in that include: The capability of obtaining on-demand information indicates the capability of obtaining on-demand information, wherein the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

34. A method for transmitting information, It is characterized in that include: The on-demand information is sent, where the on-demand information includes configuration information of the on-demand common uplink and downlink signals / channels and / or validation information of the on-demand common uplink and downlink signals / channels.

35. A method for transmitting information, It is characterized in that include: A message of a random access process is sent, wherein the message of the random access process includes a cell switching instruction.

36. An information acquisition device, It is characterized in that include: The acquisition unit is used to obtain basic information.

37. An information acquisition device, It is characterized in that include: The reporting unit is used to report the on-demand information capability, wherein the on-demand information capability indicates the ability to obtain on-demand information, and the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

38. An information acquisition device, It is characterized in that include: The acquisition unit is used to acquire on-demand information, wherein the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

39. An information acquisition device, It is characterized in that include: The acquisition unit is used to acquire a cell switching instruction from a message of a random access process, and switch to a target cell indicated by the cell switching instruction.

40. An information transmission device, It is characterized in that include: The sending unit is used to send basic information.

41. An information transmission device, It is characterized in that include: An acquisition unit is used to acquire on-demand information capability, wherein the on-demand information capability indicates the ability to acquire on-demand information, wherein the on-demand information includes configuration information of an on-demand common downlink signal / channel and / or configuration information of an on-demand common uplink signal / channel.

42. An information transmission device, It is characterized in that include: The sending unit is used to send on-demand information, wherein the on-demand information includes configuration information of the on-demand common uplink and downlink signals / channels and / or validation information of the on-demand common uplink and downlink signals / channels.

43. An information transmission device, It is characterized in that include: The sending unit is used to send a message of a random access process, where the message of the random access process includes a cell switching instruction.

44. A computer-readable storage medium, the computer-readable storage medium being a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored, It is characterized in that The computer program is executed by a processor to execute the steps of the information acquisition method according to any one of claims 1 to 31; Alternatively, execute the steps of the information transmission method described in any one of claims 32 to 35.

45. An information acquisition device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, It is characterized in that When the processor runs the computer program, the processor performs the steps of the information acquisition method according to any one of claims 1 to 31.

46. ​​An information transmission device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, It is characterized in that When the processor runs the computer program, the processor performs the steps of the information transmission method according to any one of claims 32 to 35.

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