CN114760673A

CN114760673A - System information request method and device, terminal and storage medium

Info

Publication number: CN114760673A
Application number: CN202110041483.XA
Authority: CN
Inventors: 曹春燕; 顾祥新
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-07-15

Abstract

The embodiment of the application discloses a system information request method and device, a terminal and a storage medium; the method comprises the following steps: the terminal monitors whether at least one relay device broadcasts the required target system information in a first time period; under the condition that the target system information is not monitored in a first time period, the terminal sends first information to target relay equipment in at least one relay equipment, wherein the first information is used for requesting the target relay equipment to forward the target system information; the target relay device acquires first information from the terminal. Therefore, in the embodiment of the present application, before the terminal needs to request the target relay device of the at least one relay device to forward the required target system information, sending and receiving unnecessary system information requests are avoided by monitoring first and then requesting, so that the system signaling overhead is reduced, and the system resource utilization rate is improved.

Description

System information request method and device, terminal and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for requesting system information, a terminal, and a storage medium.

Background

The system and Service Aspects (SA) group of the third Generation Partnership Project (3rd Generation Partnership Project,3GPP) started research related to Proximity-based Services (ProSe) communication at Release12 (Release 12).

Because the actual network deployment has coverage blind spots, and a terminal in the coverage blind spot cannot communicate with a network device, a communication architecture of a relay device (UE-to-network relay) is introduced in the SA group of 3GPP when researching Prose communication, and network coverage is improved by forwarding a data service through the relay device to solve the problem of coverage blind spots.

Currently, standard protocols specified by 3GPP support relay devices to forward System Information (SI) to terminals connected to the relay devices through broadcast, multicast or proprietary signaling. However, with the continuous evolution and subdivision of communication scenarios, the standard protocol specified by 3GPP needs further research for the terminal to request the relay device to forward the content of the system information required by the relay device.

Disclosure of Invention

Embodiments of the present application provide a method and an apparatus for requesting system information, a terminal, and a storage medium, so that it is expected that sending and receiving unnecessary system information requests are avoided by monitoring before requesting before the terminal needs to request forwarding of required system information to a relay device, thereby facilitating reduction of system signaling overhead and improvement of system resource utilization.

In a first aspect, an embodiment of the present application provides a system information request method, including:

the terminal monitors whether at least one relay device broadcasts the required target system information in a first time period;

and under the condition that the target system information is not monitored in the first time period, the terminal sends first information to target relay equipment in the at least one relay equipment, wherein the first information is used for requesting the target relay equipment to forward the target system information.

In a second aspect, an embodiment of the present application provides a system information request method, including:

the method comprises the steps that target relay equipment acquires first information from a terminal, the first information is used for requesting the target relay equipment to forward target system information required by the terminal, and the first information is sent to the target relay equipment in at least one relay equipment when the terminal does not monitor that at least one relay equipment broadcasts the target system information in a first time period. In a third aspect, an embodiment of the present application provides a system information request apparatus, where the apparatus includes a processing unit and a communication unit, and the processing unit is configured to:

Monitoring whether at least one relay device broadcasts required target system information in a first time period;

and under the condition that the target system information is not monitored in the first time period, sending first information to a target relay device in the at least one relay device through the communication unit, wherein the first information is used for requesting the target relay device to forward the target system information.

In a fourth aspect, an embodiment of the present application provides a system information requesting device, where the device includes a processing unit and a communication unit, and the processing unit is configured to:

the method comprises the steps that first information from a terminal is obtained through a communication unit, the first information is used for requesting to forward target system information required by the terminal, and the first information is sent by the terminal without monitoring that at least one relay device broadcasts the target system information in a first time period. In a fifth aspect, an embodiment of the present application provides a terminal, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the one or more programs include instructions for performing the steps in the first aspect of the embodiment of the present application.

In a sixth aspect, embodiments of the present application provide a relay device that is a target relay device comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, the one or more programs comprising instructions for performing the steps in the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps as described in the first aspect or the second aspect of the embodiment of the present application.

In an eighth aspect, embodiments of the present application provide a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in the first aspect or the second aspect of embodiments of the present application. The computer program may be a software installation package.

It can be seen that, in this embodiment of the present application, first, the terminal monitors whether at least one relay device broadcasts the required target system information in a first time period. Then, in the case that the target system information is not monitored within the first time period, the terminal transmits the first information to a target relay device of the at least one relay device. Finally, the target relay device obtains the first information from the terminal. Because the first information is used for requesting the target relay equipment to forward the target system information, the method avoids sending and receiving unnecessary system information requests in a mode of monitoring before requesting before the terminal needs to request the target relay equipment in at least one relay equipment to forward the required target system information, thereby being beneficial to reducing the system signaling overhead and improving the utilization rate of system resources.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a schematic architecture diagram of another wireless communication system provided in an embodiment of the present application;

fig. 3 is a schematic flowchart of a system information request method according to an embodiment of the present application;

fig. 4 is a block diagram illustrating functional units of a system information request device according to an embodiment of the present disclosure;

fig. 5 is a block diagram illustrating functional units of another system information request device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a relay device according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort with respect to the embodiments in the present application belong to the protection scope of the present application.

It should be noted that "connection" in the embodiments of the present application refers to various connection manners such as direct connection or indirect connection, so as to implement communication between devices, and is not limited in any way. In the embodiments of the present application, the expression "network" and "system" refers to the same concept, and a communication system is a communication network.

The technical solution of the embodiment of the present application may be applied to various wireless communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an Advanced Long Term Evolution (LTE-A) System, a New Radio (NR) System, an Evolution System of an NR System, an LTE (LTE-based Access to Unlicensed Spectrum, LTE-U) System, an NR (NR-based Access to Unlicensed Spectrum, UMTS-U) System, a UMTS-based Access to Unlicensed Spectrum, a UMTS-based communications (UMTS-based communications) System, a UMTS-based network (UMTS-based communications, UMTS-based communications System, a UMTS-based communications System, WLAN), Wireless Fidelity (WiFi), 6th-Generation (6G) system, other communication systems, etc.

It should be noted that, the conventional wireless communication system has a limited number of connections and is easy to implement. However, with the development of communication technology, the wireless communication system may support not only a conventional wireless communication system, but also a device-to-device (D2D) communication, a machine-to-machine (M2M) communication, a Machine Type Communication (MTC), a vehicle-to-vehicle (V2V) communication, a vehicle networking (V2X) communication, a narrowband internet of things (NB-IoT) communication, and the like, and thus the technical solution of the embodiments of the present application may also be applied to the above wireless communication system.

Optionally, the wireless communication system according to the embodiment of the present application may be applied to beamforming (beamforming), Carrier Aggregation (CA), Dual Connectivity (DC), or Standalone (SA) deployment scenarios, etc.

Optionally, the wireless communication system of the embodiment of the present application may be applied to an unlicensed spectrum. The unlicensed spectrum may also be referred to as a shared spectrum. Alternatively, the wireless communication system in the present embodiment may also be applied to a licensed spectrum. The licensed spectrum may also be considered as an unshared spectrum.

Since the embodiments of the present application are described in conjunction with a terminal, a relay device, and a network device, the terminal, the relay device, and the network device will be described in detail below.

Specifically, the terminal may be a User Equipment (UE), a remote terminal (remote UE), a relay UE, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote station, a mobile device, a user terminal, a smart terminal, a wireless communication device, a user agent, or a user equipment. It should be noted that the relay device is a terminal capable of providing a relay forwarding service for other terminals (including a remote terminal). In addition, the terminal may also be 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 a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a next generation communication system (e.g., NR communication system), or a terminal in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in particular.

Further, the terminal can be deployed on land, including indoors or outdoors, hand-held, wearable or vehicle-mounted; can be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.).

Further, the terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned autonomous driving, a wireless terminal device in remote medical treatment (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), or the like.

Specifically, the network device may be a device for communicating with the terminal, and is responsible for radio resource management, quality of service (QoS) management, data compression and encryption, data transmission and reception, and the like on the air interface side. The network device may be a Base Station (BS) in a communication system or a device deployed in a Radio Access Network (RAN) for providing a wireless communication function. For example, a base station (BTS) in a GSM or CDMA communication system, a Node B (NB) in a WCDMA communication system, an evolved node B (eNB or eNodeB) in an LTE communication system, a next-generation evolved node B (ng-eNB) in an NR communication system, and a next-generation node B (gNB) in an NR communication system. In addition, the network device may be other devices in a Core Network (CN), such as access and mobility management function (AMF), User Plane Function (UPF), and the like; but also may be an Access Point (AP) in a Wireless Local Area Network (WLAN), a relay station, a communication device in a PLMN network for future evolution, or a communication device in an NTN network, etc.

It should be noted that in some network deployments, the network device may be a stand-alone node to implement all functions of the base station, and may include a Centralized Unit (CU) and a Distributed Unit (DU), such as a gNB-CU and a gNB-DU, and may further include an Active Antenna Unit (AAU). Wherein, CU may implement part of the functionality of the network device, and DU may implement part of the functionality of the network device. For example, the CU is responsible for processing non-real-time protocols and services, and implements functions of a Radio Resource Control (RRC) layer, a Service Data Adaptation (SDAP) layer, and a Packet Data Convergence (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. In addition, the AAU implements part of the physical layer processing functions, radio frequency processing, and related functions of the active antenna. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling (such as RRC layer signaling) can be considered to be sent by the DU or by the DU and the AAU under the network deployment. It is to be understood that the network device may comprise at least one of a CU, a DU, an AAU. In addition, the CU may be divided into network devices in an access network (RAN), or the CU may be divided into network devices in a core network, which is not specifically limited.

Further, the network device may have mobile characteristics, e.g., the network device may be a mobile device. Alternatively, the network device may be a satellite, 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 Elliptic Orbit (HEO) satellite, or the like. Alternatively, the network device may be a base station installed on land, water, or the like.

Further, the network device may provide services for a cell, and a terminal in the cell may communicate with the network device through a transmission resource (e.g., a spectrum resource). The cell may include a macro cell (macro cell), a small cell (small cell), a city cell (metro cell), a micro cell (micro cell), a pico cell (pico cell), a femto cell (femto cell), and the like.

For an exemplary wireless communication system according to an embodiment of the present application, please refer to fig. 1. Wireless communication system 10 may include a terminal 110, a relay device 120, and a network device 130. Since the terminal 110 (or called remote UE) is out of the coverage of the network device 130, the terminal 110 may forward system information, signaling or data, etc. through the relay device 120 (or called UE-to-network relay) in the coverage of the network device 130. Among them, the relay device 120 is a terminal capable of providing a relay service capability, and the relay device 120 may be one relay device (i.e., a target relay device) determined by the terminal 110 through a relay discovery procedure, or the relay device 120 may be one relay device (i.e., a target relay device) in which the terminal 110 resides.

It should be noted that the relay device 120 and the network device 130 may establish communication through a Uu interface. When the terminal 110 is in an RRC CONNECTED state (RRC _ CONNECTED), a communication connection is established between the terminal 110 and the relay device 120 through the PC5 interface, and the cell corresponding to the network device 130 is a serving cell of the terminal 110. At this time, the relay device 120 and the network device 130 may adopt an existing terminal-to-serving cell communication mechanism, and system information, signaling or data transmission may be performed between the relay device 120 and the terminal 110 through a direct communication mechanism. For downlink, relay device 120 may forward system information, signaling, or data sent by network device 130 to terminal 110; for uplink, the relay device 120 may forward the signaling or data sent by the terminal 110 to the network device 130.

In addition, when the terminal 110 is in an RRC IDLE state (RRC _ IDLE) or an RRC INACTIVE state (RRC _ INACTIVE), the terminal 110 resides under the relay device 120. At this time, although no communication connection is established between the terminal 110 and the relay apparatus 120, the terminal 110 may also forward system information or signaling through the relay apparatus 120.

Optionally, the wireless communication system 10 may further include a plurality of network devices, and each network device may include a certain number of terminals and/or a certain number of relay devices within a coverage area thereof, which is not particularly limited herein.

Optionally, the wireless communication system 10 may further include other network entities such as a network controller, a mobility management entity, etc., which are not limited in this regard.

Before describing the system information request method provided by the embodiment of the present application in detail, relevant contents related to the embodiment of the present application are described.

1. Proximity-based services (ProSe) communication

The system and Service Aspects (SA) group of the third Generation Partnership Project (3rd Generation Partnership Project,3GPP) started a related study of ProSe communication at Release12 (Release 12). In ProSe communication, terminals can directly communicate with each other through a PC5 interface, a PC5 interface is a direct interface between terminals, and a communication interface between a terminal and a network device is called a Uu interface.

Because the actual network deployment has coverage blind spots, and a terminal in the coverage blind spot cannot communicate with a network device, a communication architecture of a relay device (UE-to-network relay) is introduced in the SA group of 3GPP when researching Prose communication, and network coverage is improved by forwarding a data service through the relay device to solve the problem of coverage blind spots. Wherein the relay device may be within a coverage area or outside the coverage area of the network device.

For example, please refer to fig. 2. Since the terminal 210A is outside the coverage of the network device 220, the terminal 210A can access the network through the terminal 220B within the coverage of the network device 220. Among them, the terminal 220B is a relay device (or UE-to-network relay) capable of providing a relay service capability. In addition, direct communication between the terminal 210C and the terminal 210D may be performed through the PC5 interface, and communication between the terminal 210E and the terminal 210G may be performed through the terminal 210F. Among other things, terminal 220F is a relay device (or UE-to-UE relay) capable of providing relay service capabilities.

2. System Information (SI) in NR Uu interface

The NR communication system classifies system information of the NR Uu interface more definitely based on the LTE communication system, thereby ensuring that the terminal can normally camp on a cell providing service for the terminal, and provides necessary common channel information of its access network and ensures its mobility in a non-connected state.

The system information may be divided into a Master Information Block (MIB) and a series of System Information Blocks (SIBs) according to the importance of the system information content and the propagation manner.

In order to more reasonably arrange the utilization of network resources, the propagation modes of system messages can be divided into modes of periodic broadcast and on-demand (on-demand) request transmission based on terminals. In the periodic broadcast mode, the network device may always send the calculated SI within a system information time window (SI-window) corresponding to the SI. In the mode of requesting transmission on demand based on the terminal, if the terminal does not request to transmit the SI, the network device does not transmit the SI to the terminal; if the terminal has a request to send the SI, the network device sends the SI to the terminal at a certain time within the calculated system information time window corresponding to the SI.

The system information may be divided into MIB and a series of SIBs, or may be divided into Minimum system information (Minimum SI) and Other system information (Other SI). The Minimum SI may include MIB and SIB1, which are transmitted through a Broadcast Channel (BCH) and a downlink shared channel (DL-SCH), respectively, and the propagation mode of the Minimum SI is periodic broadcast. Other SIBs are collectively called Other SI, and the propagation method thereof may be a periodic broadcast or a transmission based on a terminal request on demand. Meanwhile, the terminal can normally reside or access the current cell only when reading the Minimum SI of the current cell, and the current cell is not allowed to reside if the network equipment does not broadcast the complete Minimum SI.

For the MIB, the MIB contains cell barring status related information and a number of physical layer parameters needed to acquire the SIB1 for the current cell. The transmission period of the MIB is fixed to 80ms, and the same information can be repeatedly transmitted within 80 ms. If the terminal receives the MIB, the MIB is stored, and the following judgment process is executed according to the content of the MIB: when the terminal is in an idle state, an inactive state or a connected state, if the current cell is prohibited from accessing (Barred), judging whether cell reselection aiming at other cells is allowed on the same frequency point according to intraFreqReselection information; if the current cell allows access, time-frequency parameters indicating a control channel to receive the SIB1, etc. are acquired.

For SIB1, SIB1 contains some special system setup information for the current cell, such as parameters needed for initial access, current cell common configuration, and scheduling information for each SIB in Other SI. The scheduling information of each SIB in the Other SI includes Other SI scheduling and usage rule parameters, status indication information indicating whether each SIB is currently transmitted, system information area Identification (ID), and configuration status of SIBs that need to be requested to be broadcasted.

In addition, the transmission period of the SIB1 is 160ms, the same information can be repeatedly transmitted within 160ms, and the default repetition period is 20 ms. If the terminal receives SIB1, SIB1 is stored and the following procedure is performed depending on its content: storing cell access related information (including plmn-IdentityList, trackingAreaCode, cellIdentity and the like); applying a serving cell common configuration parameter; the validity of each SIB in Other SI was examined. If the terminal stores the effective version, the version is used; otherwise, the terminal decides to directly read the system information or initiate a request to the network device according to the scheduling information of each SIB in Other SI in SIB1 and the broadcasting situation of currently required SIBs.

For Other SIs, an Other SI may include one or more SIBs (e.g., SIB2/SIB3, etc.). The transmission of each SIB in the Other SI is performed by a dynamic scheduling manner within a periodic system information time window (SI-window). Wherein, SIBs with the same period in Other SI can be transmitted in the same SI, and each SI corresponds to one SI-window, while SI-windows of different SIs have the same length but are not allowed to overlap each Other.

If the terminal wants to acquire the Other SI, it needs to determine the sequence value of each SIB according to the scheduling information of each SIB in the Other SI in SIB1, and then calculate the SI-window position corresponding to each SIB. The network device may send the corresponding SIB multiple times within one SI-window, and if the terminal does not successfully acquire within the SI-window, may continue to acquire within subsequent SI-windows corresponding to the SIB.

The terminal needs to store the MIB, SIB1 or other SIBs acquired from the current camping or serving cell. Meanwhile, the effective time of each system information version after the validity is confirmed is at most 3 hours, and the system information version is deleted by the terminal after the effective time is exceeded.

The MIB and the SIB1 are both cell-level specific messages, i.e. after a terminal accesses or camps in a current cell, the correctness and validity of the MIB and SIB1 of the current cell must be guaranteed.

Each SIB in Other SI can be configured as system information at a cell level or an area level. The system information of the cell level is only used in a certain cell and is invalid after the terminal leaves the cell; the system information at the area level is common within a set SI area, and one SI area may contain one or more cells.

For a terminal in an idle state or an inactive state, the terminal may listen for a system information update indication in a designated paging opportunity in each discontinuous reception period. And for the terminal in the connected state, if the terminal is configured with the common search space for monitoring paging, the terminal monitors the system information update indication at least once in each system information modification period. The SI is configured with a system information modification period, the SI in the modification period cannot be changed, and SI modification can only start from the start time of the next modification period. That is, when the terminal knows that the SI needs to be updated in the current modification period, the terminal listens to the new SI at the start time of the next modification period. Meanwhile, the system information update can be indicated through scheduling and repeatedly transmitted for a plurality of times in the modification period. In addition, the terminal may always apply the old SI configuration until the new SI is received.

In summary, currently, the standard protocol specified by 3GPP supports the relay device to forward the system information to the terminal (i.e. remote UE) connected thereto through broadcast, multicast or proprietary signaling. Because a terminal can request a relay device to forward the system information required by the relay device, if the relay devices in the communication range of the terminal in the network all forward the system information in a broadcasting mode, and part of the relay devices in the communication range or a relay device broadcasts the required system information, the terminal requests the relay device to forward the system information again, which increases unnecessary signaling overhead and causes system resource waste.

In combination with the above description, an embodiment of the present application provides a flow chart of a system information request method, please refer to fig. 3, where the method includes:

s310, the terminal monitors whether at least one relay device broadcasts the required target system information in a first time period.

Wherein, the communication interface between the terminal and the target relay device may be a PC5 interface.

It should be noted that, first, the at least one relay device may include all relay devices within a communication range of the terminal, and each relay device in the at least one relay device may be in the same cell (i.e., a current cell) as the terminal. Therefore, the terminal may monitor system information or signaling of the current cell forwarded by broadcasting by each relay device of the at least one relay device.

Secondly, the terminal may forward system information or signaling of the current cell required by the target relay device of the at least one relay device. It should be noted that in this embodiment of the present application, a communication connection may be established between the terminal and the target relay device, for example, the terminal is in an RRC connected state, or a communication connection may not be established, for example, the terminal is in an RRC idle state or an RRC inactive state. Meanwhile, the terminal may also establish a communication connection with the target relay device in the RRC connected state, and then disconnect the communication connection with the target relay device due to switching from the RRC connected state to the RRC idle state or the RRC inactive state.

Third, the target relay device in this embodiment may be a relay device determined by the terminal from the at least one relay device through a relay discovery procedure, such as selecting a relay device with the best signal quality from the at least one relay device, selecting a relay device with the best device state (the most power, the strong processing capability, the strong relay service capability, and the like) from the at least one relay device, and the like; may be one of the at least one relay device on which the terminal resides, such as the terminal residing under a relay device of the at least one relay device through cell reselection; the terminal may also establish a communication connection with one relay device of the at least one relay device in the RRC connected state, and then continue to reside in the relay device due to switching from the RRC connected state to the RRC idle state or the RRC inactive state. At this time, the relay apparatus is referred to as a target relay apparatus.

Finally, since the propagation modes of the system information may be divided into a periodic broadcast mode and a terminal-on-demand (on-demand) request-based transmission mode, the terminal requests the target relay device to forward the required target system information in the embodiment of the present application. However, since there may be some cases where some or a certain relay device broadcasts the target system information required by the terminal in the at least one relay device within the communication range of the terminal (e.g., a certain relay device mainly broadcasts the target system information to other terminals, but the terminal can also monitor the target system information), therefore, in order to avoid the waste of system resources caused by the increase of unnecessary signaling overhead, the embodiment of the present application considers that before the terminal requests the target relay device to forward the target system information required by the terminal, whether the at least one relay device in the communication range broadcasts the target system information is determined by adding a mechanism of listening for a period of time (a first period of time), therefore, unnecessary system information requests are prevented from being sent through the mechanism, and further the system signaling overhead is favorably reduced, and the utilization rate of system resources is improved.

The following embodiments of the present application will specifically describe target system information.

Specifically, the target system information may include other system information besides the necessary system information actively forwarded to the terminal by the target relay device.

In the system information design of the NR Uu interface (a communication interface between a terminal and a network device, a communication interface between a relay device and a network device, and the like), the system information may be classified into Minimum system information (Minimum SI) and Other system information (Other SI). The Minimum SI may include MIB and SIB1, and the propagation mode is periodic broadcast; other SI may include one or more SIBs (e.g., SIB2/SIB3, etc.). See the description in the above "system information in NR Uu interface" for details.

At present, in Release17 (Release17) stage of 3GPP, the NR communication system also introduces a communication architecture of a relay device (UE-to-network relay). In the communication architecture, the relay device may forward data traffic for a terminal (remote UE) and may also forward system information of a current cell for the terminal, so as to provide the terminal with necessary common channel information and other network configuration information required for accessing or camping on the current cell. However, since the embodiment of the present application mainly analyzes the case where the communication interface between the terminal and the relay device is the PC5 interface, the above-mentioned "system information design of the NR Uu interface" may not be adapted to the PC5 interface, and further research on the system information design of the PC5 interface is required.

Based on this, first, since the communication interface between the terminal and the target relay device in the embodiment of the present application is a PC5 interface, the target system information forwarded by the terminal requesting the target relay device in the embodiment of the present application mainly includes other system information except the necessary system information (essentialsibss) actively forwarded to the terminal by the target relay device. The necessary system information may be understood as system information necessary for the terminal to normally camp on or access the current cell, and the propagation mode is periodic broadcast. That is to say, the network device will periodically broadcast the necessary system information, and then the target relay device will actively forward the system information to the terminal, so as to realize the normal residence or access of the terminal to the current cell.

Secondly, since the communication interface between the terminal and the target relay device is a PC5 interface, the embodiment of the present application considers that the necessary system information may include a master information block (e.g. MIB indicating a system frame number SFN), a system information block type 1 (e.g. SIB1 indicating a public land mobile network PLMN and cell information), a system information block type 2 (e.g. SIB2 indicating cell access barring information), and information related to a direct connection communication system information block. The direct connection communication system information block related information may include LTE device to device (FeD 2D) system information block related information (e.g., SIB18/SIB 19). And the target system information may include other system information of the current cell besides necessary system information, such as SIB10/SIB11/SIB12/SIB13/SIB14/SIB15, etc., and there are differences in target system information required by different terminals.

Finally, the target system information mainly depends on the on-demand request of the terminal, i.e. the terminal requests the target relay device to forward when it needs it. In addition, the target relay device may employ a broadcast, multicast, or proprietary signaling method when forwarding the target system information to the terminal. The dedicated signaling may be PC5-RRC signaling or signaling newly specified by standard protocols.

Specifically, the granularity of the target system information requested by the terminal may be based on the system information SI or the system information block SIB.

It can be appreciated that the target system information granularity requested by the terminal from the target relay device can be based on SI or SIB. That is, the terminal may request SIBs corresponding to a desired current cell, and may also request an SI including SIBs corresponding to the desired current cell, thereby facilitating to improve flexibility and efficiency of network configuration of system information in the system information request process.

Specifically, each SIB in the target system information may be configured as system information at a cell level or an area level.

It should be noted that the SIBs at the cell level are only used in the current cell and are disabled after the terminal leaves the current cell; the region-level SIBs are commonly used in a set system information region, and one system information region may include one or more cells.

The first period will be described in detail in the following embodiments of the present application,

specifically, the first time period may satisfy one of the following modes: the first time period is a time period in a preset time, the first time period is configured by a network, the first time period is preconfigured by a system, the first time period is specified by a standard protocol, the first time period is determined by the timeout duration of a preset timer, and the preset time is specified by the network configuration, the standard protocol or the system.

It should be noted that, the first time period in the embodiment of the present application may be configured from a network device to a terminal, may be preconfigured by a system, may be specified by a standard protocol specified by 3GPP, and may be determined by an timeout duration of a preset timer, or may be a time period within a preset time. For the preset timer, it can be understood that, when the terminal needs to request the target relay device to forward the target system information, the terminal may start the preset timer first, and monitor whether the relay device broadcasts the target system information in the communication range before the preset timer expires, where the preset timer may be network configuration or system pre-configuration. For the preset time, it can be understood that, when the terminal needs to request the target relay device to forward the target system information, the terminal may randomly monitor a period of time t (i.e., a first period of time), t ∈ (0, X), where X represents the preset time.

And S320, under the condition that the target system information is not monitored in the first time period, the terminal sends the first information to the target relay equipment in at least one relay equipment.

The first information may be used to request the target relay device to forward the target system information.

It should be noted that, in the embodiment of the present application, before the terminal requests the target relay device to forward the target system information required by the terminal, it is first determined whether at least one relay device in its communication range broadcasts the target system information by monitoring for a period of time (i.e., a first period of time). And then, if the target system information is not monitored in the first time period, the terminal requests the target relay equipment to forward the target system information, so that unnecessary system information requests are prevented from being sent by a mode of monitoring before requesting before the terminal requests the required system information, the system signaling overhead is reduced, and the utilization rate of system resources is improved.

The following embodiments of the present application will specifically describe an RRC state in which a terminal needs to request required target system information from a target relay device.

Specifically, the terminal may be in an RRC IDLE state (RRC _ IDLE), an RRC INACTIVE state (RRC _ INACTIVE), or an RRC CONNECTED state (RRC _ CONNECTED).

It is understood that for all RRC states (idle/inactive/connected state), the terminal (remote UE) supports on-demand (on-demand) request to send system information. That is, when the terminal needs to request the target relay device for the required target system information, the terminal may be in an RRC idle state, an RRC inactive state, or an RRC connected state.

In addition, it should be noted that, as can be seen from the above description, the RRC states of the terminal are different, which results in different communication connection states (i.e., connected or disconnected) with the target relay device and different determinations (i.e., relay discovery procedure determination, relay device where the terminal resides, etc.) of the target relay device. Therefore, the terminal requesting system information on demand according to the embodiment of the present application can be in all RRC states, which is beneficial to improving flexibility of system configuration in the system information requesting process.

Further, if the terminal is in the RRC connected state, the first information may be carried by the PC5-RRC signaling; alternatively, the first information may be carried by signaling specified by a standard protocol.

The signaling specified by the standard protocol may include signaling of interaction between the terminal and the relay device (or between the terminal and the terminal) newly specified by the standard protocol.

It can be understood that, if the terminal in the RRC connected state does not monitor the target system information in the first time period, the terminal may request the target relay device to forward the target system information through the PC5-RRC signaling or the signaling specified by the standard protocol, thereby facilitating the signaling interaction between the terminal and the relay device in the system information request process.

Further, if the terminal is in an RRC idle state or an RRC inactive state, the first information is carried by a signaling specified by a standard protocol.

It can be understood that, if the terminal in the RRC idle state or the RRC inactive state does not monitor the target system information in the first time period, the terminal may request the target relay device to forward the target system information through the signaling specified by the standard protocol, thereby facilitating the implementation of signaling interaction between the terminal and the relay device in the process of requesting the system information.

The following embodiment of the present application further describes steps included in the method shown in fig. 3.

In one possible example, after S310, the method further comprises: and under the condition that the target system information is monitored in the first time period, the terminal cancels the transmission of the first information to the target relay equipment.

It can be understood that, if the terminal monitors the target system information in the first time period, it indicates that the terminal can receive the target system information, and does not need to request the target relay device to forward the target system information, thereby being beneficial to avoiding sending unnecessary system information requests, reducing system signaling overhead, and improving system resource utilization rate.

In one possible example, the target system information is received within a system information time window corresponding to the target system information after the terminal sends the first information.

Note that, the transmission of each SIB in the target system information may be performed by a dynamic scheduling method in a periodic system information time window (SI-window). SIBs with the same period in the target system information may be sent in the same SI, and each SI corresponds to a system information time window. That is, each SIB in the target system information corresponds to one system information time window. Meanwhile, the system information time windows of different SIs are consistent in length, but are not allowed to overlap with each other. If the terminal wants to acquire the target system information, the terminal needs to determine the position of the system information time window corresponding to each SIB in the target system information. The network device may send the SIB required by the terminal for multiple times in one system information time window, and if the terminal does not successfully acquire in the system information time window, the network device may continue to acquire in a subsequent time window corresponding to the SIB, thereby ensuring that the terminal successfully receives the required target system information through the system information time window.

Specifically, after S320, the method further includes: if the terminal does not receive the target system information in the system information time window corresponding to the target system information after the first information is sent, the terminal monitors whether at least one relay device broadcasts the target system information again in a first time period; and under the condition that the target system information is not monitored in the first time period, the terminal retransmits the first information to the target relay equipment.

It can be understood that, if the terminal does not receive the target system information within the system information time window corresponding to the target system information after sending the first information, it needs to determine whether at least one relay device within the communication range broadcasts the target system information by monitoring for a period of time (i.e., the first time period) again. Then, if the target system information is not monitored in the first time period, the terminal needs to request the target relay device to forward the target system information again, so that unnecessary system information requests are avoided being sent in a mode of re-requesting after re-monitoring under the condition that the system information required by the terminal last request is not available, system signaling overhead is reduced, and system resource utilization rate is improved.

Further, after listening again for whether the at least one relay device broadcasts the target system information within the first time period, the method further includes: and under the condition that the target system information is monitored in the first time period, the terminal cancels the resending of the first information to the target relay equipment.

It can be understood that, if the terminal monitors the target system information again in the first time period, it indicates that the terminal can receive the target system information, and does not need to re-request the target relay device to forward the target system information, thereby being beneficial to avoiding sending unnecessary system information requests, reducing system signaling overhead, and improving system resource utilization rate.

S330, the target relay equipment acquires first information from the terminal.

In one possible example, the target system information is sent within a system information time window corresponding to the target system information after the target relay device acquires the first information. Therefore, the terminal is guaranteed to successfully receive the required target system information through the system information time window.

It can be seen that, in this embodiment of the present application, first, the terminal monitors whether at least one relay device broadcasts the required target system information in a first time period. Then, the terminal transmits the first information to a target relay device of the at least one relay device in a case that the target system information is not monitored within the first time period. Finally, the target relay device obtains the first information from the terminal. Because the first information is used for requesting the target relay equipment to forward the target system information, the method avoids sending and receiving unnecessary system information requests by a mode of monitoring first and then requesting before the terminal needs to request the target relay equipment in at least one relay equipment to forward the required target system information, thereby being beneficial to reducing the system signaling overhead and improving the utilization rate of system resources.

The above description has been directed primarily to the embodiments of the present application from a method-side perspective. It is understood that the terminal or the network device includes hardware structures and/or software modules for performing the respective functions in order to realize the functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the present application may perform division of functional units on a terminal or a network device according to the above method example. For example, each functional unit may be divided in correspondence with each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that, in the embodiment of the present application, the division of the unit is schematic, and is only one division of a logic function, and another division may be used in actual implementation.

In the case of an integrated unit, fig. 4 provides a block diagram of functional units of a system information request apparatus. The system information requesting device 400 includes: a processing unit 402 and a communication unit 403. The processing unit 402 is used for controlling and managing the operation of the terminal. For example, the processing unit 402 is used to support the terminal to perform the steps in fig. 3 and other processes for the solution described in the present application. The communication unit 403 is used to support communication between the terminal and other devices in the wireless communication system. The system information requesting apparatus 400 may further include a storage unit 401 for storing program codes executed by the system information requesting apparatus 400 and transmitted data.

It should be noted that the system information request device 400 may be a chip or a chip module.

The processing unit 402 may be a processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. Processing unit 402 may also be a combination that performs computing functions, e.g., comprising one or more microprocessors, a combination of DSPs and microprocessors, and the like. The communication unit 403 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 401 may be a memory. When the processing unit 402 is a processor, the communication unit 403 is a communication interface, and the storage unit 401 is a memory, the system information request apparatus 400 according to the embodiment of the present application may be a terminal as shown in fig. 5.

In a specific implementation, the processing unit 402 is configured to perform any step performed by the terminal in the above method embodiment, and when performing data transmission such as sending, optionally invokes the communication unit 403 to complete the corresponding operation. The details will be described below.

The processing unit 402 is configured to: monitoring whether at least one relay device broadcasts required target system information in a first time period; and under the condition that the target system information is not monitored in the first time period, sending first information to target relay equipment in at least one piece of relay equipment, wherein the first information is used for requesting the target relay equipment to forward the target system information.

It should be noted that specific implementation of each operation in the embodiment shown in fig. 4 may be described in detail in the method embodiment shown in fig. 3, and details are not described herein again.

It can be seen that, in this embodiment of the present application, first, the system information requesting apparatus listens in the first time period whether at least one relay device broadcasts the required target system information. Then, in case that the target system information is not monitored within the first time period, the system information requesting device transmits the first information to a target relay device among the at least one relay device. Finally, because the first information is used for requesting the target relay device to forward the target system information, the method avoids sending unnecessary system information requests by monitoring and then requesting before the system information request device needs to request the target relay device in at least one relay device to forward the required target system information, thereby being beneficial to reducing the system signaling overhead and improving the system resource utilization rate.

In one possible example, the target system information includes other system information than necessary for the target relay device to actively forward to the terminal.

In one possible example, the necessary system information includes at least one of: a master information block, a system information block type 1, a system information block type 2, and information related to a direct connection communication system information block.

In one possible example, the granularity of the target system information requested by the system information requesting device is based on system information SI or a system information block SIB.

In one possible example, the first time period satisfies one of the following: the first time period is a time period within a preset time, the first time period is configured by a network, the first time period is preconfigured by a system, the first time period is specified by a standard protocol, the first time period is determined by the timeout duration of a preset timer, and the preset time is specified by the network configuration, the standard protocol or the system.

In one possible example, the system information requesting device is in a radio resource control, RRC, idle state, RRC inactive state, or RRC connected state.

In one possible example, after listening for the first time period whether the at least one relay device broadcasts the required target system information, the processing unit 402 is further configured to: and under the condition that the target system information is monitored in the first time period, canceling the transmission of the first information to the target relay equipment.

In one possible example, the target system information is received within a system information time window corresponding to the target system information after the system information requesting device transmits the first information.

In one possible example, after sending the first information to the target relay device of the at least one relay device, the processing unit 402 is further configured to: if the target system information is not received in a system information time window corresponding to the target system information after the first information is sent, monitoring whether at least one relay device broadcasts the target system information again in a first time period; and under the condition that the target system information is not monitored in the first time period, retransmitting the first information to the target relay equipment.

In the case of an integrated unit, fig. 5 provides a block diagram of functional units of still another system information requesting device. The system information request device 500 is applied to a target relay device, and specifically includes: a processing unit 502 and a communication unit 503. The processing unit 502 is configured to control and manage actions of the target relay device, for example, the processing unit 502 is configured to support the target relay device to execute the steps in fig. 3 and other processes for the technical solutions described in this application. The communication unit 503 is used to support communication between the target relay device and other devices in the wireless communication system. The system information requesting apparatus 500 may further include a storage unit 501 for storing program codes executed by the target relay device and transmitted data.

The processing unit 502 may be a processor or a controller, and may be, for example, a CPU, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processing unit 502 may also be a combination that performs computing functions, e.g., comprising one or more microprocessors, a combination of DSPs and microprocessors, or the like. The communication unit 503 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 501 may be a memory. When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the system information request apparatus 500 according to the embodiment of the present application may be a relay device shown in fig. 7.

In a specific implementation, the processing unit 502 is configured to perform any one of the steps performed by the target relay device in the above method embodiments, and when performing data transmission such as sending, the communication unit 503 is optionally invoked to complete the corresponding operation. The details will be described below.

The processing unit 502 is configured to: the method comprises the steps of obtaining first information from a terminal, wherein the first information is used for requesting to forward target system information required by the terminal, and the first information is sent by the terminal without monitoring at least one relay device to broadcast the target system information in a first time period.

It should be noted that specific implementation of each operation in the embodiment shown in fig. 5 may be detailed in the description of the method embodiment shown in fig. 3, and details are not described herein again.

It can be seen that, in the embodiment of the present application, the system information requesting apparatus obtains the first information from the terminal. Because the first information is used for requesting to forward the target system information required by the terminal, and the first information is sent by the terminal without monitoring the target system information broadcast by at least one relay device in the first time period, the method avoids sending and receiving unnecessary system information requests by monitoring and then requesting before the terminal needs to request to forward the required target system information to the system information request device, thereby being beneficial to reducing the system signaling overhead and improving the utilization rate of system resources.

In one possible example, the target system information includes other system information than the necessary system information that the target relay device is actively forwarding to the terminal.

In one possible example, the granularity of the target system information requested by the terminal is based on system information SI or system information blocks SIB.

In one possible example, the terminal is in a radio resource control, RRC, idle, RRC inactive, or RRC connected state.

In one possible example, the target system information is sent within a system information time window corresponding to the target system information after the target relay device acquires the first information.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. The terminal 600 includes a processor 610, a memory 620, a communication interface 630, and a communication bus for connecting the processor 610, the memory 620, and the communication interface 630.

The memory 620 includes, but is not limited to, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a portable read-only memory (CD-ROM), and the memory 620 is used to store program codes executed by the terminal 600 and data transmitted.

Communication interface 630 is used for receiving and transmitting data.

The processor 610 may be one or more CPUs, and in the case where the processor 610 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 610 in the terminal 600 is configured to read one or more programs 621 stored in the memory 620, and perform the following operations: monitoring whether at least one relay device broadcasts required target system information in a first time period; and under the condition that the target system information is not monitored in the first time period, sending first information to target relay equipment in at least one relay equipment, wherein the first information is used for requesting the target relay equipment to forward the target system information.

It should be noted that the specific implementation of each operation may adopt the corresponding description of the method embodiment shown in fig. 3, and the terminal 600 may be configured to execute the method on the terminal side of the method embodiment of the present application, which is not described in detail herein.

It can be seen that the terminal listens for the first time period whether the at least one relay device broadcasts the target system information. Then, the terminal transmits the first information to a target relay device of the at least one relay device in a case that the target system information is not monitored within the first time period. Finally, since the first information is used for requesting the target relay device to forward the target system information, the method avoids sending unnecessary system information requests by monitoring and then requesting before the terminal needs to request the target relay device in at least one relay device to forward the required target system information, thereby being beneficial to reducing the system signaling overhead and improving the system resource utilization rate.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a relay device according to an embodiment of the present disclosure. The relay device 700 includes a processor 710, a memory 720, a communication interface 730, and a communication bus for connecting the processor 710, the memory 720, and the communication interface 730.

Memory 720 includes, but is not limited to, RAM, ROM, EPROM, or CD-ROM, and memory 720 is used to store the relevant instructions and data.

Communication interface 730 is used to receive and transmit data.

The processor 710 may be one or more CPUs, and in the case where the processor 710 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 710 in the relay device 700 is configured to read one or more programs 721 stored in the memory 720 to perform the following operations: the method comprises the steps of obtaining first information from a terminal, wherein the first information is used for requesting to forward target system information required by the terminal, and the first information is sent by the terminal without monitoring at least one relay device to broadcast the target system information in a first time period.

It should be noted that the specific implementation of each operation may adopt the corresponding description of the method embodiment shown in fig. 3, and the relay device 700 may be configured to execute the method on the target relay device side of the method embodiment of the present application, which is not described in detail herein. The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the above method embodiment for a terminal or a management device.

Embodiments of the present application further provide a computer program product, where the computer program product includes a computer program, and the computer program is operable to make a computer perform some or all of the steps described in the above method embodiments for a terminal or a management device. The computer program product may be a software installation package.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware or by executing software instructions by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, Erasable Programmable Read Only Memory (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), registers, a hard disk, a removable hard disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal or a management device. Of course, the processor and the storage medium may reside as discrete components in a terminal or management device.

It will be appreciated by those of skill in the art that in one or more of the examples described above, the functionality described in the embodiments of the application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Each module/unit included in each apparatus and product described in the foregoing embodiments may be a software module/unit, or may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit. For example, for each apparatus and product applied to or integrated into a chip, each module/unit included in the apparatus and product may all be implemented by hardware such as a circuit, or at least a part of the modules/units may be implemented by a software program running on a processor integrated within the chip, and the remaining (if any) part of the modules/units may be implemented by hardware such as a circuit; for each device and product applied to or integrated with the chip module, each module/unit included in the device and product may be implemented by hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least part of the modules/units may be implemented by a software program running on a processor integrated inside the chip module, and the rest (if any) part of the modules/units may be implemented by hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by hardware such as a circuit, different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by hardware such as a circuit.

The above-mentioned embodiments, objects, technical solutions and advantages of the embodiments of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A system information request method, comprising:

2. The method of claim 1, wherein the target system information comprises other system information except necessary system information actively forwarded to the terminal by the target relay device.

3. The method of claim 2, wherein the necessary system information comprises at least one of: a master information block, a system information block type 1, a system information block type 2, and direct communication system information block related information.

4. The method of claim 1, wherein the granularity of the target system information requested by the terminal is based on System Information (SI) or a System Information Block (SIB).

5. The method of claim 1, wherein the first time period satisfies one of: the first time period is a period of time within a preset time, the first time period is configured by a network, the first time period is preconfigured by a system, the first time period is specified by a standard protocol, the first time period is determined by the timeout duration of a preset timer, and the preset time is configured by the network, specified by the standard protocol or preconfigured by the system.

6. The method of claim 1, wherein the terminal is in a Radio Resource Control (RRC) idle state, an RRC inactive state, or an RRC connected state.

7. The method according to any of claims 1-6, wherein after the terminal listens for the first time period whether at least one relay device broadcasts the required target system information, the method further comprises:

And under the condition that the target system information is monitored in the first time period, the terminal cancels the transmission of the first information to the target relay equipment.

8. The method according to any of claims 1-6, wherein the target system information is received within a system information time window corresponding to the target system information after the terminal transmits the first information.

9. The method of claim 8, wherein after the sending the first information to the target relay device of the at least one relay device, the method further comprises:

if the terminal does not receive the target system information in a system information time window corresponding to the target system information after the first information is sent, the terminal monitors whether the at least one relay device broadcasts the target system information again in the first time period;

and under the condition that the target system information is not monitored in the first time period, the terminal retransmits the first information to the target relay equipment.

10. A system information request method, comprising:

the method comprises the steps that target relay equipment acquires first information from a terminal, the first information is used for requesting the target relay equipment to forward target system information required by the terminal, and the first information is sent to the target relay equipment in at least one piece of relay equipment when the terminal does not monitor that the target system information is broadcasted by the at least one piece of relay equipment in a first time period.

11. The method of claim 10, wherein the target system information comprises other system information except necessary system information actively forwarded to the terminal by the target relay device.

12. The method of claim 11, wherein the necessary system information comprises at least one of: a master information block, a system information block type 1, a system information block type 2, and information related to a direct connection communication system information block.

13. The method of claim 10, wherein the granularity of the target system information requested by the terminal is based on System Information (SI) or a System Information Block (SIB).

14. The method of claim 10, wherein the first period of time satisfies one of: the first time period is a time period within a preset time, the first time period is configured by a network, the first time period is preconfigured by a system, the first time period is specified by a standard protocol, the first time period is determined by the timeout duration of a preset timer, and the preset time is configured by the network, the standard protocol or the system.

15. The method of claim 10, wherein the terminal is in a Radio Resource Control (RRC) idle state, an RRC inactive state, or an RRC connected state.

16. The method according to any of claims 10-15, wherein the target system information is sent within a system information time window corresponding to the target system information after the target relay device acquires the first information.

17. A system information requesting device, the device comprising a processing unit and a communication unit, the processing unit configured to:

18. A system information requesting device, the device comprising a processing unit and a communication unit, the processing unit configured to:

the method comprises the steps that first information from a terminal is obtained through a communication unit, the first information is used for requesting to forward target system information required by the terminal, and the first information is sent by the terminal without monitoring that at least one relay device broadcasts the target system information in a first time period.

19. A terminal comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the one or more programs including instructions for performing the steps in the method of any of claims 1-9.

20. A relay device, characterized in that the relay device is a target relay device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the one or more programs comprising instructions for performing the steps in the method of any of claims 10-16.

21. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-9 or 10-16.