CN110351709B - Communication method and communication device - Google Patents

Abstract

The application provides a communication method and a communication device. The communication method comprises the following steps: receiving first information from a base station, the first information comprising M system information blocks, the M system information blocks comprising at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time-related information, wherein M is a positive integer; the first information is processed. According to the method and the device, the base station can send the system information block to the terminal.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method and a communication apparatus.

Background

In the New Radio (NR), System Information (SI) includes Minimum System Information (MSI) and Other System Information (OSI). The MSI may include, for example, a main system information block (MIB) and a System Information Block (SIB) 1. The MIB is transmitted on a Physical Broadcast Channel (PBCH), and the terminal receives at a corresponding location. SIB1 is transmitted on a Physical Downlink Shared Channel (PDSCH), a Physical Downlink Control Channel (PDCCH) position corresponding to the SIB is indicated by the MIB, and the terminal descrambles the PDCCH using a radio network temporary identifier (SI-RNTI) for system information to obtain a position of transmitting SIB1 content; and OSIs are transmitted on the PDSCH, and if the OSIs are transmitted in a broadcast mode, the terminal finds out the position of the corresponding OSI according to the indication in the SIB1, and descrambles to obtain the content in the OSIs.

Disclosure of Invention

The application provides a communication method and a communication device, which can enable a terminal to receive a system information block.

In a first aspect, a communication method is provided, and the method includes: receiving first information from a base station, the first information comprising M system information blocks, the M system information blocks comprising at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time-related information, wherein M is a positive integer; the first information is processed.

In the embodiment of the present application, the terminal receives information of a system information block sent by the base station, for example, the information of the system information block may include updated information of a second system information block, that is, update information of the second system information block that needs to be updated, where the update information includes update content of the second system information block; the information of the system information block may also be a first system information block, which includes information related to time, such as coordinated universal time TUC, global positioning system time GSP time, etc.; the information of the system information block may also include warning information, such as ETWS information, CMAS information, etc. Alternatively, the information of the system information block may include the above three kinds. In this way, the terminal can be enabled to acquire the information of the system information block, and further can process the acquired information of the system information block.

With reference to the first aspect, in certain implementations of the first aspect, the communication method further includes: before the receiving the first information from the base station, further comprising: and sending second information to the base station, wherein the second information comprises information related to N system information blocks, the N system information blocks are subscribed system information blocks, and N is a positive integer.

Through the embodiment of the application, the terminal sends subscription information (namely, second information) to the base station, wherein the subscription information can be a system information block which is told by the terminal to the base station and is concerned by the terminal; or, the terminal tells the base station which system information blocks the terminal expects to receive. Therefore, the base station can send the information of the system information block to the terminal according to the subscription information of the terminal, and further, the base station can avoid the waste of resources caused by the fact that the base station sends the information of the system information block which is not concerned by the terminal to the terminal.

With reference to the first aspect, in certain implementations of the first aspect, the second information includes indexes of the N system information blocks and/or capability information related to T system information blocks, where T is a positive integer less than or equal to N.

In the embodiment of the present application, the information related to the N system information blocks may be indexes of the N system information blocks, or may be capability information related to the T system information blocks.

With reference to the first aspect, in certain implementations of the first aspect, the capability information related to the T system information blocks includes: the terminal is capable of processing the T system information blocks.

With reference to the first aspect, in certain implementations of the first aspect, the N system information blocks include the first system information block.

The time-related information is also system information that the terminal is interested in. The terminal may inform the base station of an index of a first system information block including information related to time, and the base station may transmit the information of the first system information block to the terminal.

With reference to the first aspect, in certain implementations of the first aspect, the second information further includes a time precision, and the time precision is related to a transmission period of the first system information block.

According to the method and the device, the terminal tells the base station time precision, so that the base station determines the sending period of the first system information block (namely, the system information block comprising the time-related information) according to the time precision, and the base station is prevented from sending the first system information block all the time, and resource waste is avoided.

With reference to the first aspect, in certain implementations of the first aspect, the communication method further includes: determining the effective time of the M system information blocks according to the types of the M system information blocks, wherein the effective time is the time for updating and/or applying the M system information blocks.

According to the embodiment of the application, the terminal determines the effective time of the system information block according to the type of the system information block, so that the system information of the base station and the system information of the terminal are kept consistent.

With reference to the first aspect, in certain implementations of the first aspect, the determining the effective time of the M system information blocks according to the types of the M system information blocks includes: when the first information comprises a first-class system information block, determining that the first-class system information block is directly effective, wherein the first-class system information block at least comprises at least one of the following three information: the first system information block, information of an earthquake and tsunami warning system ETWS and information of a commercial mobile warning system CMAS; or, when the first information includes a second type system information block, determining that the information of the second type system information block is effective in a next modification period, wherein the second type system information block includes the updated second system information block; or, when the first information includes a second type system information block, determining that the information of the second type system information block is effective at a first transmission opportunity corresponding to the second type system information block in a next modification period.

With reference to the first aspect, in certain implementations of the first aspect, the first information further includes an effective time of the M system information blocks, and the effective time is a time when the M system information blocks are updated and/or applied.

According to the embodiment of the application, the first information from the base station to the terminal can also comprise the system information needing to be updated and the effective time of the system information, so that the system information of the base station and the system information of the terminal are kept consistent.

With reference to the first aspect, in some implementations of the first aspect, the first information is carried in radio resource control, RRC, signaling.

When the first information is carried on the dedicated RRC signaling, the terminal can acquire the information of the system information block, thereby saving the paging overhead. When the first information includes information of the first system information block and is carried on the broadcast channel, the terminal may be notified of information related to time in a paging manner.

With reference to the first aspect, in some implementations of the first aspect, before the receiving the first information from the base station, the method includes: and detecting a paging message, wherein the paging message carries notification information of the information related to the time.

According to the embodiment of the application, the terminal can monitor the paging message, so that the notification information of the information related to the time can be acquired. When the notification information is monitored, the information related to the time is read.

With reference to the first aspect, in some implementations of the first aspect, before the receiving the first information from the base station, the method includes: receiving indication information from the base station, wherein the indication information is used for indicating that paging messages are monitored in a public search space, and the public search space can transmit the first information; the receiving of the first information from the base station includes: and monitoring the paging message and receiving first information from the base station on the public search space.

The common search space is different for different terminals and is configured separately for different terminals. If the terminal is configured with the common search space alone, the terminal may listen to paging directly. If the common search space is not configured for the terminal individually, but the common search space is used by a plurality of terminals, that is, if any common search space capable of broadcasting system information exists, the base station sends indication information to the terminal, instructs the terminal to monitor paging in the common search space, and acquires the first information in the common search space.

With reference to the first aspect, in certain implementations of the first aspect, the common search space is located on a common bandwidth part BWP, and the common BWP is capable of transmitting the first information, and the common BWP is located at a position where at least two BWPs overlap, and the two BWPs are used by two terminals.

In a second aspect, a communication method is provided, which includes: determining M system information blocks, wherein M is a positive integer; sending first information to a terminal, where the first information includes the M system information blocks, and the M system information blocks include at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time related information.

In the embodiment of the application, the base station determines the system information block which needs to be sent to the terminal, and sends the information of the system information block to the terminal, so that the terminal can acquire the information of the system information block. The information of the system information block may include information of an updated system information block, that is, update information of the system information block that needs to be updated, the update information including update contents of the system information block; the information of the system information block may also include time-related information, such as coordinated universal time, UTC, global positioning system time, GSP, time, etc.; the information of the system information block may also include warning information, such as ETWS information, CMAS information, etc. Alternatively, the information of the system information block may include the above three kinds. In this way, the terminal can be made to acquire the information of the system information block.

With reference to the second aspect, in some implementations of the second aspect, before the sending the first information to the terminal, the method includes: receiving second information from the terminal, the second information including information related to N system information blocks, the N system information blocks being system information blocks to which the terminal subscribes, wherein N is a positive integer.

In the embodiment of the application, before sending the information of the system information block, the base station receives the subscription information (i.e. the second information) sent by the terminal, wherein the subscription information may be the system information block which is told by the terminal to the base station and is concerned by the terminal; or, the terminal tells the base station which system information blocks the terminal expects to receive. Therefore, the base station can send the information of the system information block to the terminal according to the subscription information of the terminal, and further, the base station can avoid the waste of resources caused by the fact that the base station sends the information of the system information block which is not concerned by the terminal to the terminal.

With reference to the second aspect, in some implementations of the second aspect, the second information includes indexes of the N system information blocks and/or capability information related to T system information blocks, where T is a positive integer less than or equal to N; and, the sending the first information to the terminal includes: and sending first information to the terminal based on the N system information blocks.

The base station sends the information of the system information block based on the subscription information of the terminal, so that the waste of resources can be avoided, namely, the resources can be saved.

With reference to the second aspect, in some implementations of the second aspect, the capability information related to the T system information blocks includes: the terminal is capable of processing the T system information blocks.

With reference to the second aspect, in some implementations of the second aspect, the N system information blocks include the first system information block, the first system information block includes information related to time, and the M system information blocks include the first system information block.

With reference to the second aspect, in some implementations of the second aspect, the second information further includes a time precision, the time precision being related to a transmission period of the first system information block; and determining the sending period of the first system information block according to the time precision.

According to the embodiment of the application, the base station acquires the time precision, and then determines the period for sending the first system information block (namely, the system information block comprising the information related to the time), so that the base station is prevented from always sending the first system information block and wasting resources.

With reference to the second aspect, in certain implementations of the second aspect, the first information further includes an effective time of the M system information blocks, and the effective time is a time when the M system information blocks are updated and/or applied.

According to the embodiment of the application, the first information sent by the base station to the terminal can also comprise the system information needing to be updated and the effective time of the system information, so that the system information of the base station and the system information of the terminal are kept consistent.

With reference to the second aspect, in some implementations of the second aspect, the first information is carried in radio resource control, RRC, signaling.

When the first information is carried on the RRC signaling, the terminal can acquire the information of the system information block, and the paging overhead is further saved. When the first information includes information of the first system information block and is carried on the broadcast channel, the terminal may be notified of information related to time in a paging manner.

With reference to the second aspect, in some implementations of the second aspect, before the sending the first information to the terminal, the method includes: and sending a paging message to the terminal, wherein the paging message carries notification information related to time.

In the embodiment of the application, the base station can send the paging message to inform the terminal of the information related to the time information. And when the terminal monitors that the notification information exists, the terminal receives the first system information block.

With reference to the second aspect, in some implementations of the second aspect, before the sending the first information to the terminal, the method includes: and sending indication information to the terminal, wherein the indication information is used for indicating the terminal to monitor paging messages in a public search space, and the public search space can transmit the first information.

The common search space is different for different terminals and is configured separately for different terminals. If the terminal is configured with the common search space alone, the terminal may listen to paging directly. If the common search space is not separately configured for the terminal, but the common search space is used by a plurality of terminals, that is, if any common search space capable of broadcasting system information exists, the base station sends indication information to the terminal, and the terminal is instructed to listen to the first information in the common search space. The terminal may listen for the first information.

With reference to the second aspect, in certain implementations of the second aspect, the common search space is located on a common bandwidth part BWP, the common BWP being capable of transmitting the first information, the common BWP being located where at least two BWPs overlap, the two BWPs being for use by two terminals; the sending the first information to the terminal includes: transmitting first information to the terminal on the common BWP.

In a third aspect, a communication method is provided, and the communication method includes: determining a common bandwidth part BWP, the common BWP being located at a position where at least two BWPs overlap, the two BWPs being used by two terminals; transmitting paging information and/or system information to at least one of the at least two terminals through the common BWP.

By the embodiment of the application, when the common search space is configured on the respective BWPs for different terminals, if the two BWPs have an overlapping part, the common search space and the PDSCH resource corresponding thereto are configured on the overlapping part, thereby saving resources.

With reference to the third aspect, in certain implementations of the third aspect, the configuration parameters of the common BWP include at least: identity, frequency domain resources, bandwidth, subcarrier spacing.

The at least two terminals may be caused to listen for pages or receive system information on the common BWP based on the identity of the common BWP, frequency domain resources, bandwidth, subcarrier spacing.

In a fourth aspect, a communication method is provided, the communication method including: paging information and/or system information is received on a common bandwidth part BWP, the common BWP being located where at least two BWPs overlap, the two BWPs being used by two terminals.

By the embodiment of the application, when configuring the common search space on the respective BWPs for different terminals, if the two BWPs have overlapping portions, the common search space and the PDSCH resource corresponding thereto are configured in the overlapping portions, thereby saving resources, and the terminals can listen to the paging message on the common BWP or receive the system information.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the configuration parameters of the common BWP include at least: identity, frequency domain resources, bandwidth, subcarrier spacing.

In a fifth aspect, a communication device is provided, which includes a processor and a transceiver, and may perform the method of any of the above aspects or any possible implementation manner thereof.

In a sixth aspect, a communication device is provided, which has a function of implementing the behavior of the base station in the above method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In some possible implementations, the base station includes a processor and a transceiver in its structure, and the processor is configured to support the base station to perform the corresponding functions in the above method. The transceiver is used for supporting communication between the base station and the terminal, and transmitting information or instructions related to the method to the terminal. The base station may also include a memory, coupled to the processor, that retains program instructions and data necessary for the network device.

In a seventh aspect, a communication device is provided, which has a function of implementing the terminal behavior in the above method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In some possible implementations, the structure of the terminal includes a processor and a transceiver, and the processor is configured to support the terminal to perform the corresponding functions in the above method. The transceiver is used for supporting communication between the terminal and the base station or the terminal, and transmitting information or instructions involved in the method. The terminal may also include a memory, coupled to the processor, that retains program instructions and data necessary for the terminal.

In an eighth aspect, a computer storage medium is provided, in which program code is stored, and the program code can be used to instruct execution of the method in any one of the first to fourth aspects or any possible implementation manner thereof.

In a ninth aspect, there is provided a computer program comprising instructions which, when run on a computer, cause the computer to perform the method of any of the first to fourth aspects above, or any possible implementation thereof.

Drawings

Fig. 1 is a schematic diagram of a system suitable for use with embodiments of the present application.

Fig. 2 is a schematic diagram of a network architecture to which the embodiments of the present application are applicable.

Fig. 3 is a schematic diagram of the bandwidth part BWP.

Fig. 4 is another schematic diagram of the bandwidth part BWP.

Fig. 5 is a schematic interaction diagram of a communication method according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a system information block change cycle suitable for an embodiment of the present application.

Fig. 7 is a schematic diagram of a virtual BWP suitable for use in embodiments of the present application.

Fig. 8 is a schematic interaction diagram of a communication method suitable for use in another embodiment of the present application.

Fig. 9 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of a communication device according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a fifth Generation (5th Generation, 5G) system, a New Radio (NR) or other evolution systems, which are not limited in this embodiment of the present application.

A terminal in the embodiments of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. 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 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 future 5G Network or a terminal in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.

The network device in the embodiment of the present application may be a device for communicating with a terminal, and may be any device having a wireless transceiving function or a chip that can be disposed on the device, where the device includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved NodeB, or Home Node B, HNB), BaseBand Unit (Base band Unit, BBU), Access Point (AP) in Wireless Fidelity (WIFI) system, etc., and may also be 5G, such as NR, gbb in system, or TRP, transmission Point (TRP or TP), one or a group of antennas (including multiple antennas, NB, or a transmission panel) of a Base Station in 5G system, such as a baseband unit (BBU), a Distributed Unit (DU), or the like, which is not limited in the embodiments of the present application.

Fig. 1 is a schematic diagram of a system 100 to which a communication method according to an embodiment of the present invention can be applied. As shown in fig. 1, the system 100 includes a network device 102, and the network device 102 may include 1 antenna or multiple antennas, e.g., antennas 104, 106, 108, 110, 112, and 114. Additionally, network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

Network device 102 may communicate with at least one terminal, such as terminal 116 and terminal 122. However, it is understood that network device 102 may communicate with any number of terminals similar to terminal 116 or terminal 122. Terminals 116 and 122 can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.

As shown in fig. 1, terminal 116 is in communication with antennas 112 and 114, where antennas 112 and 114 transmit information to terminal 116 over a forward link (also called a downlink) 118 and receive information from terminal 116 over a reverse link (also called an uplink) 120. In addition, terminal 122 is in communication with antennas 104 and 106, where antennas 104 and 106 transmit information to terminal 122 over forward link 124 and receive information from terminal 122 over reverse link 126.

In a Frequency Division Duplex (FDD) system, forward link 118 can utilize a different Frequency band than reverse link 120, and forward link 124 can employ a different Frequency band than reverse link 126, for example.

As another example, in Time Division Duplex (TDD) systems and Full Duplex (Full Duplex) systems, forward link 118 and reverse link 120 may use a common frequency band and forward link 124 and reverse link 126 may use a common frequency band.

Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminals in a sector of the areas covered by network device 102. The network device may transmit signals to all terminals in its corresponding sector through single-antenna or multi-antenna transmit diversity. The transmitting antennas of network device 102 can also utilize beamforming to improve signal-to-noise ratio of forward links 118 and 124 during communication between network device 102 and terminals 116 and 122 over forward links 118 and 124, respectively. Moreover, mobile devices in neighboring cells can experience less interference when the network device 102 utilizes beamforming to transmit to terminals 116 and 122 scattered randomly through an associated coverage area, as compared to a manner in which the network device transmits signals to all of its terminals through single-antenna or multi-antenna transmit diversity.

At a given time, network device 102, terminal 116, or terminal 122 may be a wireless communication transmitting device and/or a wireless communication receiving device. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a PLMN network, a D2D network, an M2M network, an IoT network, or other networks, and fig. 1 is a simplified schematic diagram for example, and other network devices may be included in the network, which are not shown in fig. 1.

Fig. 2 is a schematic diagram of a network architecture, for example, a new radio access (NR) network architecture in a next generation wireless communication system, to which an embodiment of the present invention can be applied. In the network architecture diagram, a network device may be divided into a Centralized Unit (CU) and a plurality of Transmission Reception Point (TRP)/Distributed Unit (DU), that is, a bandwidth-based unit (BBU) of the network device is reconfigured into a DU and CU functional entities. It should be noted that the forms and numbers of the centralized units and the TRP/DUs do not limit the embodiments of the present invention. Although the forms of the respective corresponding centralized units of the network device 1 and the network device 2 shown in fig. 2 are different, the respective functions are not affected. It is understood that the TRP/DU within the scope of the centralized unit 1 and the dashed line is a constituent element of the network device 1, the TRP/DU within the scope of the centralized unit 2 and the solid line is a constituent element of the network device 2, and the network device 1 and the network device 2 are network devices (or referred to as base stations) involved in the NR system.

The CU may handle Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, and even support partial core network function sinking to the access network, which is referred to as an edge computing network in the term, and may meet the higher requirement of the future communication network for emerging services such as video, network shopping, and virtual/augmented reality on network delay.

The DU can mainly handle physical layer functions and layer 2 functions with higher real-time requirements, and considering the transmission resources of a Radio Remote Unit (RRU) and the DU, part of the physical layer functions of the DU can be moved up to the RRU, and with the miniaturization of the RRU, even more aggressive DUs can be merged with the RRU.

CU can be distributed in a centralized mode, DU distribution depends on the actual network environment, a core urban area is high in telephone traffic density, small in inter-station distance, and in areas with limited machine room resources, such as universities and large-scale performance venues, DU can also be distributed in a centralized mode, telephone traffic is sparse, inter-station distance is large, and in other areas, such as suburb counties and mountain areas, DU can be distributed.

The S1-C interface illustrated in fig. 2 may be a standard interface between a network device and a core network, and specifically, the device connected to S1-C is not shown in fig. 2.

In the following, for clarity, before describing the communication method of the embodiment of the present application, the terms mentioned in the embodiment of the present application are explained.

1. System information

As described above, the System Information (SI) includes Minimum System Information (MSI) and Other System Information (OSI).

For example, the Earthquake and Tsunami Warning System (ETWS) information or the Commercial Mobile Alert System (CMAS) information is located in OSI, when ETWS/CMAS information arrives, the base station sends an ETWS/CMAS notification through paging, and after receiving the ETWS/CMAS notification, the terminal with ETWS/CMAS capability receives the ETWS/CMAS information; the base station can also directly send the ETWS/CMAS information to the terminal through dedicated RRC signaling. It is understood that ETWS and CMAS both pertain to alert information. It should be noted that similar to the warning information, other emergency information may be processed in a similar manner.

As another example, information related to time. For example, Coordinated Universal Time (UTC) information and Global Positioning System Time (GPS Time) information. Time-related information, such as UTC and GPStime, is located in OSI, which is not required for some terminals.

2. Common search spaces

In NR, the PDCCH common search space (common search space) type related to SI is:

type0-PDCCH for reception of SIB1, descrambling with SI-RNTI

Type0A-PDCCH for reception of OSI, descrambling with SI-RNTI

Type1-PDCCH for message 2(message2, MSG-2), message 4(message4, MSG-4) reception, use radio network temporary identifier (RA-RNTI) used for random access, radio network temporary identifier (TC-RNTI) used for temporary cell, radio network temporary identifier (C-RNTI) used for cell.

Type2-PDCCH, used for receiving paging, and descrambled by using radio network temporary identifier (P-RNTI) used for paging.

3. Bandwidth part

The NR frequency band is wider than the LTE frequency band, and according to the current spectrum division mode, the NR frequency band is at least 100M, and the maximum bandwidths that can be supported are different due to different radio frequency capabilities of different terminals, so the concept of bandwidth part (BWP) is introduced. Fig. 3 shows a schematic diagram of BWP. The terminal is allocated a portion of the spectrum usage over a bandwidth to accommodate the bandwidth that the terminal can support. And, by configuring a plurality of BWPs with different bandwidths for the terminal, flexible scheduling for the terminal and power saving of the terminal are achieved. FIG. 4 shows another schematic diagram of BWP, including a Synchronization Signal Block (SSB).

Synchronization signals, including Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS), may together with a Physical Broadcast Channel (PBCH) form an SSB. There may be some cell-defined SSBs (cell-defined SSBs) on the bandwidth of a cell, and they broadcast the SSBs, including PSS, SSS, and PBCH, so that the terminal can camp on, and the MIB in the system information is carried in the broadcast PBCH, and the location of SIB1 is indicated in the MIB.

It should be understood that the names of the synchronization signal blocks in the embodiments of the present application are not limited, that is, it may be expressed by other names. For example, SSB can also be expressed as SS/PBCH block.

Fig. 4 includes BWP1 and BWP 2. Each BWP includes an initial BWP (initial BWP). initial BWP is the bandwidth where the MIB broadcast in the cell defined SSB indicates the location of SIB 1. The terminal may acquire SIB1, as well as OSI, on the initial BWP and may listen for pages.

Each BWP also includes an active BWP. When the terminal has the service arrival, the base station will dispatch the service from the initial BWP to a BWP with bandwidth matching with the service, and this BWP is called active BWP. According to the current standard, as shown in fig. 4, there are PDCCH common search space of Type0A and Type2 that can be configured on active BWP, i.e. the terminal can receive paging and OSI on the current active BWP.

Next, with reference to fig. 5, a detailed description is given of a communication method according to an embodiment of the present application from the perspective of interaction. The method includes steps 110-120, described in detail below.

110, determining M system information blocks, wherein M is a positive integer;

120, the base station sends first information to the terminal, where the first information includes the M system information blocks, and the M system information blocks include at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time related information.

When any one or more of the following conditions (1), (2) and (3) occur, the base station transmits the first information to the terminal.

(1) The base station receives the warning information.

It will be appreciated that the warning message may also be considered a system information block. Alternatively, the base station receives the warning information, and it may be understood that the base station receives a system information block including the warning information.

Wherein, the warning information may include ETWS information or CMAS information, etc. The first information includes warning information, and it is understood that the first information includes a system information block including the warning information. For example, the base station receives a third system information block, where the third system information block includes some warning information such as ETWS or CMAS, and the base station may send the third system information block to the terminal, so that the terminal knows the warning information. The warning message may be sent by the core network to the base station.

(2) The base station transmits the first system information block to the terminal.

The first system information block is a system information block comprising time related information. The base station sends a first system information block to the terminal, and the first system information block comprises: the base station transmits information related to time to the terminal.

The time-related information includes UTC information, GPS time information, and the like. The first information may comprise the first system information block, or the first information may directly comprise time-related information. For example, the base station sends the UTC information to the terminal, so that the terminal knows the UTC information.

(3) And the base station determines that the system information block needs to be updated.

The system information block in (3) is a system information block other than the warning information and the first system information block. In the embodiment of the present application, the system information block that needs to be updated may also be referred to as an updated second system information block.

And when the base station determines that the second system information block needs to be updated, the base station sends the updated second system information block to the terminal. The first information comprises the updated second system information block, it being understood that the first information comprises the second system information block or the first information comprises the updated content of the second system information block.

Optionally, before the base station sends the first information to the terminal, the terminal sends second information to the base station, where the second information includes information related to N system information blocks, where the N system information blocks are subscribed system information blocks, and N is an integer.

Alternatively, the N system information blocks may be all or part of the system information blocks that are of interest or concern to the terminal. In a possible manner, after the terminal enters the connected state, the terminal sends SI subscription information to the base station, so that the base station knows the system information block in which the terminal is interested or concerned.

The SI subscription information may include all system information blocks that the terminal is interested in, or is expected to receive. Wherein, the SI subscription information may include a system information block concerned by the terminal by default; alternatively, the SI subscription information may not include a system information block concerned by the terminal by default.

The system information blocks of default interest to the terminal may include: MIB and/or SIB 1. Because some limited but most important and most frequently occurring parameters are included in the MIB, the terminal must use these parameters to obtain other system information. Therefore, the MIB is a system information block concerned by default by the terminal. The SI subscription information sent by the terminal to the base station may not include the MIB. Even if the SI subscription information does not include the MIB, the base station may send the MIB update information to the terminal when the MIB information is changed. The SIB1 includes parameters for determining whether a cell is suitable for cell selection, and time domain scheduling information for other SIBs. Therefore, SIB1 is also the system information block of default interest for the terminal.

The system information block of default interest to the terminal may also include information similar to warning information, emergency information, etc.

It should be noted that, regarding ETWS information and CMAS information, for a terminal with ETWS information/CMAS information capability, ETWS information and CMAS information may be regarded as system information of default interest of the terminal, and a system information block including ETWS information and CMAS information may not be subscribed in the subscription information. For a terminal without ETWS information/CMAS information capability, if it is system information of interest or concern itself, it needs to subscribe the system information block including ETWS information and CMAS information in subscription information.

The above-mentioned terminal with ETWS information/CMAS information capability means that when the base station transmits ETWS information or CMAS information, the terminal will default to system information concerned by itself and will receive and has the capability of processing the information; a terminal without ETWS information/CMAS information capability means that when the base station sends ETWS information or CMAS information, the terminal will not receive the information if the information is not in the information subscribed by the terminal; or, even if received, the information cannot be processed.

Alternatively, the SI subscription information may not include the default system information block of interest of the terminal, in which case, if the default system information block of interest is updated or the default system information block of interest includes the first system information block and/or the warning information, the base station may also send the default system information block of interest and the related information to the terminal.

Optionally, the SI subscription information includes indexes of N system information blocks and/or capability information related to T system information blocks.

In one possible approach, the SI subscription information may include an index of N system information blocks. For example, for the second system information block, the base station may be made to know the system information block in which the terminal is interested in by sending a corresponding index, so that the base station may send the system information block that needs to be updated based on the subscription information. For example, when the terminal cares about the system information in SIB2, the SI subscription information includes the index of SIB2, and when the content in SIB2 needs to be updated, the base station transmits the content in SIB2 that needs to be updated to the terminal. For another example, for the first system information block, the base station is made aware that the terminal is interested in the system information block including the time-related information in a manner of sending the corresponding index, so that the base station can send the first system information block based on the subscription information.

Specifically, as described above, most of the system information required by the terminal is contained in different SIBs. In other words, most of the system information is organized in SIBs, each SIB comprising a series of parameter sets related to a certain function. For example, the content of SIB2 includes information of common or shared channels, SIB13 contains Multimedia Broadcast Multicast Service (MBMS) related control information. If the terminal is interested in the content in SIB2 and not in SIB13, the terminal may send the index of SIB2 to the base station. When the content in the SIB2 and the SIB13 needs to be updated, the base station only needs to notify the content needing to be updated in the SIB2 of the terminal, and the content needing to be updated in the SIB13 does not need to be sent to the terminal, so that waste of resources can be avoided.

It should be understood that SIB2 and SIB13 are merely exemplary, and the embodiments of the present application are not limited thereto.

In the embodiment of the application, for the updated second system information block, the base station only needs to send the system information block concerned by the terminal to the terminal in the updated second system information block, and does not need to send all the updated second system information blocks to the terminal, thereby avoiding the waste of resources.

In another possible approach, the SI subscription information may include capability information related to T system information blocks.

The capability information related to the T system information blocks includes: the terminal is capable of processing the T system information blocks.

By letting the base station know that the terminal has a certain capability, the base station can be made to transmit the relevant system information block based on this capability. For example, the terminal can process ETWS/CMAS information. When the terminal sends the capability information of the ETWS/CMAS information, if the terminal has the capability of the ETWS/CMAS information, the base station sends the ETWS and CMAS information to the terminal after receiving the ETWS and CMAS information; if the terminal does not have the ETWS/CMAS information capability, the base station does not send the ETWS and CMAS information to the terminal after receiving the ETWS and CMAS information in order to avoid wasting resources.

It should be noted that the capability information related to the T system information blocks is obtained by considering that terminals with different capabilities have different capabilities for the system information blocks. For example, ETWS/CMAS information, when the base station broadcasts ETWS/CMAS information, a terminal with ETWS/CMAS information capability will receive the ETWS/CMAS information and is capable of processing the information, and a terminal without ETWS/CMAS information capability will not receive the ETWS/CMAS information or, even if it receives the information, will not be capable of processing the information.

Optionally, the N system information blocks include the first system information block.

The first system information block is a system information block comprising time related information. The index of the first system information block is different in different systems, e.g., in LTE system the index of the first system information block is SIB 16; in NR, the index of the first system information block is now SIB 9. The embodiments of the present application do not limit this. It should be understood that the first system information block is used herein to represent a time-dependent system information block and is not intended to limit the scope of the embodiments of the present application.

Among them, the information related to the time may also be referred to as time information (time information). The terminal uses this time information for a variety of purposes, possibly involving upper layers, for example, to assist GPS initialization, to synchronize the terminal's clock (to determine MBMS session start/stop).

The time-related information, as previously described, may be UTC information, GPS time information, or other time information. The time-related information may include an absolute time and its corresponding system frame number, or time slot, or symbol. The embodiments of the present application do not limit this.

Optionally, the information related to the first system information block includes a time precision, and the time precision is related to a transmission period of the first system information block.

Generally, the base station will frequently transmit the information of the first system information block, and then the terminal will receive the information of the first system information block according to its own condition, which may result in waste of resources. According to the method and the device, the base station can determine the sending period of the first system information block according to the requirements of the terminal considering that different terminals have different requirements on the information related to the time. Specifically, in the embodiment of the present application, the terminal may send the time precision to the base station according to the situation of the terminal. The base station can determine the sending period of the first system information block according to the time precision, thereby avoiding the waste of resources caused by the frequent sending of the first system information block by the base station.

Here, determining the transmission period of the first system information block may also be understood as determining the transmission period of the first system information block.

The time precision can be expressed in a granularity mode, a unit mode, and the like, and the method is not limited in the embodiment of the application. The method and the device mainly inform the base station of the time precision through the terminal, so that the base station determines the period for sending the first system information block, and further avoid the phenomenon that the base station always sends information related to time and wastes resources. The specific form of the time precision is not limited in this application. For example, if the crystal oscillator stability of the base station is 0.05ppm and the time precision required by the terminal is 1 μ s, the base station determines that the terminal time is inaccurate after receiving the time precision (1 μ s), and the period for the base station to transmit the first system information block to the terminal should be at least 20000s after 1 μ s/0.05ppm being 20000 s. Where ppm is in parts per million and μ s is in microseconds.

Optionally, the base station sends the first information to the terminal based on the N system information blocks.

Specifically, the N system information blocks are system information blocks concerned by the terminal, and the base station sends the first information to the terminal based on the N system information blocks subscribed by the terminal. It is understood that when the second system information block concerned by the terminal needs to be updated, the base station may transmit the system information block needing to be updated to the terminal. It can also be understood that if the second system information blocks that are not of interest to the terminal need to be updated, the base station need not send the terminal update information for these system information blocks. Or, when the terminal cares about the time-related information and the subscription information sent by the terminal includes the information of the first system information block, the base station sends the information of the first system information block to the terminal. Or, when the subscribed N system information blocks include a third system information block or warning information, the base station may send the information or warning information of the third system information block to the terminal.

Wherein the third system information block is a system information block comprising warning information, as previously described.

It should be noted that when the MIB and/or the SIB1 need to be updated, the M system information blocks include the update information of the MIB and/or the SIB 1. As described previously, when the MIB and/or SIB1 are not in the SI subscription information, since MIB and/or SIB1 are system information of default interest to the terminal, the base station may transmit update information of MIB and/or SIB1 to the terminal when MIB and/or SIB1 needs to be updated.

It should be noted that, for a terminal with ETWS/CMAS capability, and when the base station knows that the terminal has ETWS or CMAS capability, and when warning information such as ETWS or CMAS appears, the base station may send the warning information such as ETWS or CMAS to the terminal.

It should be noted that, in the embodiments of the present application, "N" and "M" are only used to distinguish different objects, but do not limit the scope of the embodiments of the present application; for example, the N system information blocks represent one or more system information blocks that the terminal is interested in; the M system information blocks represent system information blocks that need to be updated or need to be notified to the terminal. For example, the M system information blocks may include all of the system information blocks that need to be updated; and/or the M system information blocks comprise the system information blocks which need to be updated in the N system information blocks; and/or the M system information blocks include system information blocks that need to be updated in system information blocks (e.g., SIB1, MIB, etc.) concerned by the terminal. The embodiments of the present application are not limited thereto.

In summary, optionally, the base station may send the first information to the terminal under at least four following conditions.

Situation one

And the base station sends first information to the terminal based on the subscription information.

Specifically, when the second system information block concerned by the terminal changes, the terminal receives the updated second system information block sent by the base station. It also means that if the second system information blocks that need to be updated are not of interest to the terminal and do not comply with the other situations described below, the base station does not need to send those system information blocks to the terminal, which can save resources. Or, when the second system information block to be updated includes the second system information block concerned by the terminal and also includes the second system information block not concerned by the terminal, the base station only needs to send the updated second system information block concerned by the terminal to the base station

The terminal can be used, and therefore resources can be saved.

Optionally, the first information may include updated information of a second system information block updated from among the N system information blocks.

Situation two

The warning message arrives at the base station. Optionally, ETWS information and/or CMAS information arrives at the base station.

And warning information such as ETWS and CMAS is used for timely issuing emergency information such as earthquake and tsunami to the public to guide the public to avoid danger and save self. Therefore, when warning information such as ETWS, CMAS, etc. occurs, the base station also transmits the warning information such as ETWS, CMAS, etc. to the terminal having this capability.

As an example, in the LTE system, warning information such as ETWS, CMAS, etc. is included in SIB10 to SIB 12. As described above, for the ETWS/CMAS-capable terminal, the SI subscription information transmitted to the base station may not include the indices of SIB10 to SIB12 including the warning information such as ETWS and CMAS. When warning information such as ETWS and CMAS appears, the base station also sends a system information block containing the warning information such as ETWS and CMAS to the terminal.

It should be understood that in different systems, ETWS, CMAS, etc. warning information may be included in different SIBs. The embodiments of the present application do not limit which SIBs the warning information, such as ETWS and CMAS, is included in.

Situation three

The MIB and/or SIB1 information changes. Optionally, the M system information blocks include update information of the MIB and/or update information of the SIB 1.

The MIB contains a limited number of, but most importantly, the most frequently occurring parameters that the terminal must use to obtain other system information. The SI subscription information sent by the terminal to the base station may not include the MIB. After the MIB information is changed, the base station may also send MIB update information to the terminal.

The SIB1 includes parameters for determining whether a cell is suitable for cell selection, and time domain scheduling information for other SIBs. The SI subscription information sent by the terminal to the base station may not include SIB 1. After the SIB1 information is changed, the base station also transmits update information of SIB1 to the terminal.

Situation four

The base station transmits information of the first system information block to the terminal.

The M system information blocks include a first system information block, which is a system information block including information related to time.

Alternatively, the base station may determine the transmission period of the first system information block based on the time accuracy of the terminal transmission. Therefore, the base station can be prevented from frequently sending the first system information block to cause resource waste.

It should be understood that the above-listed cases are merely illustrative and the present application is not limited thereto. For example, case 1, case 2, and case 3 exist simultaneously.

And the base station sends first information to the terminal under at least the four conditions, wherein the first information comprises M system information blocks, and the M system information blocks comprise the updating information of a second system information block concerned by the terminal and/or the information of the first system information block. Therefore, the first information sent by the base station to the terminal can be prevented from including the information of the system information block which is not concerned by the terminal, and the waste of resources is avoided.

And after receiving the first information, the terminal processes the information. For example, when the terminal receives the information of the first system information block, the information of the first system information block is directly applied. For another example, when the terminal receives the updated second system information block, the terminal may determine the effective time according to the information type of the second system information block. As another example, when the terminal receives the warning information, the warning information is directly applied.

In one possible approach, the terminal performs processing according to the validation times of the M system information blocks. Wherein the effective time of the M system information blocks represents the time for updating and/or applying the M system information blocks. Updating may be understood as updating parameters in the system information block; an application may be understood as processing information directly after it is received, or applying the information directly. In one possible manner, when the first information includes time-related information, it is determined that the time-related information is directly effective. When the M system information blocks comprise warning information such as ETWS and/or CMAS, the terminal can directly respond or apply the information, and the information takes effect immediately; when the updated second system information block is included in the M system information blocks, the validation time may refer to a time when the parameter in the second system information block is updated. It will be appreciated that the validation time of the system information block may be determined based on the type of system information block. In the embodiment of the application, the validation time is determined according to the type of the system information block, so that the base station and the terminal can update the system information block at the same time, and further the system information of the base station and the system information of the terminal are kept consistent.

Optionally, the effective time of the system information block may be time specified by a protocol, or the effective time is carried in the first information by the base station and sent to the terminal. It should be understood that, in the embodiment of the present application, the effective time may be immediate, may also be a certain absolute time, and may also be a certain frame, a certain subframe, a certain slot, a certain symbol, and the like. The embodiments of the present application do not limit this.

Next, two ways of keeping the effective time of the base station and the terminal consistent will be specifically described.

In a first mode

Agreement specifies an effective time, or an agreement default effective time

Optionally, the validation time of the M system information blocks is determined according to the types of the M system information blocks, and the validation time is a time for updating and/or applying the M system information blocks.

The base station can determine the effective time according to the type of the system information block, and the terminal also determines the effective time according to the type of the system information block, so that the system information is kept consistent. For example, the type of the system information block may be determined according to an index of the system information block.

Optionally, when the first information includes a first type system information block, it is determined that the first type system information block is directly valid, and the first type system information block includes at least one of the following three types of information: information related to time, information of an earthquake and tsunami warning system ETWS and information of a commercial mobile warning system CMAS; or, when the first information includes a second type system information block, determining that the information of the second type system information block is effective in a next modification period, wherein the second type system information block includes an updated system information block; or, when the first information includes a second type system information block, determining that the information of the second type system information block is effective at a first transmission opportunity corresponding to the second type system information block in a next modification period.

The first type of system information block represents an immediately valid system information block. For example, time-related information, ETWS information, warning information such as CMAS, and the like. For the first type of system information block, the validation time is immediate. The time-related information, ETWS information, warning information such as CMAS, and the like are merely examples, and the present application is not limited thereto.

The second type of system information blocks includes updated system information blocks such as MIB, SIB1, etc. Updating the system information block may be understood as updating parameters in the system information block.

It should be understood that both MIB and SIB1 have corresponding transmission periods.

In OSI, system information blocks are sent in SI messages, and an SI message is associated with an SI window (SI-window) in which only this SI message can be sent and can be sent repeatedly (how many times it is sent, which subframes it is sent on, etc., depending on the implementation of the base station), but no other SI messages can be sent. The SI windows are immediately adjacent (if adjacent) and do not overlap nor have gaps. The SI window length is the same for all SI messages. The periods of different SI messages are independent of each other.

Fig. 6 is a schematic diagram of a system information block change cycle suitable for an embodiment of the present application. As shown in fig. 6, different presence situations represent different blocks of system information. Wherein, SIBx, SIBy refer to system information blocks except MIB, SIB 1. As can be seen from the figure, the transmission timing for each system information block may be different. In the next modification period (i.e., the next modification period), the timing and the number of times of transmission of different system information blocks are also different. For example, it is possible for the MIB to be transmitted 9 times in the next modification period. Fig. 6 also shows the first transmission timing of the MIB, SIB1, SIBx, SIBy in the next modification period (next modification period) next to the current modification period (current modification period).

Suppose that M system information blocks are in effect for the first transmission opportunity corresponding to the M system information blocks in the next modification period. Specifically, as shown in fig. 6, the effective time of M system information blocks is the first transmission opportunity in the next modification period.

It should be noted that the effective time of the specific system information block is only an exemplary illustration, and the present application is not limited thereto, as long as the effective time of the system information block is consistent for the terminal and the base station. For example, except for the system information block containing warning information such as ETWS, CMAS, etc., and the system information block containing time-related information, the system information blocks take effect immediately, the effective time of the rest of the system information blocks take effect at the boundary of the next modification period. For example, the effective time may also be: warning information such as ETWS and CMAS takes effect immediately; the effective time of the MIB and SIB1 information is the effective time of the next modification period boundary; the validation time of the other SIB information may be the validation of the corresponding SI window in the next modification period.

For the warning information such as the ETWS, the CMAS and the like, as described above, the warning information such as the ETWS, the CMAS and the like is used for timely issuing emergency information such as an earthquake, a tsunami and the like to the public to guide the public to avoid risks and save self. Therefore, the terminal will take effect immediately after receiving warning information such as ETWS and CMAS.

Mode two

The base station carries the effective time in the first information.

Optionally, the first information further includes an effective time of the M system information blocks, and the effective time is a time when the M system information blocks are updated and/or applied.

For example, when the update information of MIB and SIB1 is included in the M system information blocks, it means that the above information needs to be updated. Then the update information of the M system information blocks further includes: MIB and SIB1 validation time. Specifically, the effective time may be a boundary of the next modification period, or the MIB and SIB1 may be effective for the first transmission timing in the next modification period.

The validation times of the M system information blocks may be the same or different. For example, the M system information blocks share one effective time; or the M pieces of system information correspond to P effective times, wherein P is less than or equal to M and is a positive integer. The embodiment of the present application is not limited thereto.

It should be noted that the effective time of the specific system information block is only an exemplary illustration, and the present application is not limited thereto, as long as the effective time of the system information block is consistent for the terminal and the base station. For example, except the system information blocks which need to be validated immediately, the validation time of the system information blocks concerned by other terminals is validated at the boundary of the next modification period.

It should be noted that the above two manners are only exemplary, and any manner that can enable the base station and the terminal to update the system information block simultaneously is within the scope of the implementation of the present application. For example, when the terminal receives information of M system information blocks and receives the effective time of some system information blocks in the M system information blocks, the effective time of some system information blocks with effective time may be determined according to the received effective time; for system information blocks that do not have an effective time, they may all default to immediate effect.

In the embodiment of the present application, the first information may also be received by monitoring paging.

Optionally, before receiving the first information from the base station, the method includes: receiving indication information from the base station, wherein the indication information is used for indicating that paging messages are monitored in a public search space, and the public search space can transmit the first information; the receiving of the first information from the base station includes: and monitoring the paging message and receiving first information from the base station on the public search space.

Optionally, the common search space is located on a common bandwidth part BWP, the common BWP being capable of transmitting the first information, the common BWP being located where at least two BWPs overlap, the two BWPs being for use by two terminals.

In the embodiment of the present application, after the system information block is updated, the base station may notify the terminal in a broadcast manner. In particular, the common search space is different for different terminals, and the common search space is separately configured for the different terminals. If the terminal is configured with the common search space alone, the terminal may listen to paging directly. If a common search space is not separately configured for a terminal but there is a common search space for a plurality of terminals, i.e., if any common search space in which system information can be broadcast is included on an active BWP in which the terminal is currently operating, the base station transmits indication information to the terminal instructing the terminal to listen to the first information on the common search space. The first information sent by the base station to the terminal is sent to the terminal in a broadcast mode.

In the embodiment of the present application, a virtual BWP (i.e., an example of a common BWP) is proposed. This is described in detail below with reference to fig. 7.

A base station determines a common BWP, the common BWP being located where at least two BWPs overlap, the two BWPs being used by two terminals; the base station transmits paging information and/or system information to at least one of the at least two terminals through the common BWP.

The base station configures a common search space for the terminal on active BWP, and the terminal can either acquire a paging message or system information by listening to the common search space. BWPs are configured individually according to the terminal (UE specific), and there is a high probability that BWPs of different terminals overlap. If BWPs of different terminals overlap, a common search space and PDSCH resources scheduled by the terminal are separately configured for each terminal, which results in a waste of resources. Therefore, the embodiments of the present application provide a scheme, when a base station configures a common search space for different terminals on respective BWPs, if the two BWPs have overlapping portions, the common search space and its corresponding PDSCH resources are configured in the overlapping portions.

Specifically, the base station configures a virtual BWP for the BWP overlapped terminal at the overlapped position to broadcast the paging and system information, where the virtual BWP is a different BWP from the normal active BWP and requires a specific number during configuration. Fig. 7 shows a schematic diagram of a virtual BWP.

As shown in fig. 7, to the terminal 1, at least BWP1, BWP2, BWP3, BWP4 are assigned; to the terminal 2, at least BWP1, BWP2, BWP3, BWP4 are assigned. BWP of terminal 1 and BWP of terminal 2 have overlapping portions, and thus, optionally, the overlapping portions are configured with Virtual BWP1(Virtual BWP1), Virtual BWP2, and Virtual BWP 3. The virtual BWP1 may include BWP1, BWP2, BWP4 of terminal 1 and virtual BWP1 of terminal 2. The virtual BWP2 may contain only BWP2 for terminal 2. Virtual BWP3 includes BWP3 and BWP4 of terminal 1, and also includes BWP3 and BWP4 of terminal 2.

Optionally, the configuration parameters of the common BWP include at least: identity, frequency domain resources, bandwidth, subcarrier spacing.

The base station identifies the virtual BWP configuration, e.g., virtual BWP1, virtual BWP2, virtual BWP 3. Each virtual BWP is configured with frequency domain resources, bandwidth, subcarrier spacing.

It should be understood that the above-mentioned virtual BWP1, virtual BWP2, virtual BWP3, and terminal 1 and terminal 2 are only exemplary, and the present application is not limited thereto, and any way that the virtual BWP can be configured by overlapping portions of multiple terminals is included in the scope of the embodiments of the present application. For example, virtual BWP1 may include BWP1, BWP4 of terminal 1, and virtual BWP1 of terminal 2. Virtual BWP2 may contain BWP2 for terminal 1 and terminal 2.

The terminal 1 and/or the terminal 2 listen to the paging message according to the configuration of the virtual BWP, and receive the system information on the virtual BWP after the paging message indicates system information change or ETWS/CMAS notification.

According to the embodiment of the application, the public search space is deployed on the overlapped resources, so that the resource consumption can be reduced, and the resource utilization rate can be improved.

Optionally, the first information is carried in RRC signaling.

The RRC signaling may be in the form of broadcast or dedicated RRC. When the first information is carried on the dedicated RRC signaling, the terminal can acquire the information of the system information block, thereby saving the paging overhead. When the first information includes information of the first system information block and is carried on the broadcast channel, the terminal may be notified of information related to time in a paging manner.

When the M system information blocks need to be updated, the base station may send the update information of the M system information blocks that need to be updated to the terminal through dedicated RRC signaling. Specifically, if the current terminal is on the initial BWP, the terminal can normally receive the broadcast to acquire the changed system information block. If the current terminal is not on the initial BWP, the base station sends a message to the terminal through dedicated RRC signaling, the message containing the contents of the updated system information block and optionally the effective time of the updated system information block.

The terminal can acquire the system information block on active BWP through dedicated RRC signaling. If the current terminal is on active BWP, the base station does not need to send paging message on active BWP, thereby saving paging overhead.

Optionally, before receiving the first information from the base station, the method includes: and detecting a paging message, wherein the paging message carries notification information of the information related to the time.

Specifically, when the first system information block is included in the first information, the base station may transmit the first system information block based on a transmission period of the first system information block. When the base station sends the first system information block in a broadcast manner, the terminal may monitor the paging message first, monitor whether the notification information of the first system information block exists, and read the notification information if the notification information of the first system information block exists. The waste of resources is avoided.

In the following, an embodiment of notifying the terminal that the system information block needs to be updated by means of dedicated RRC signaling is described as an example with reference to fig. 8. It should be understood that, in addition to the following description, reference may be made to the related description in the foregoing embodiments, and the description is not repeated for brevity.

The terminal enters the connected state 210.

220, the terminal sends SI subscription information to the base station.

The SI subscription information includes a system information block concerned by the terminal.

Optionally, the SI subscription information includes indexes of N system information blocks and/or capability information related to T system information blocks, where T is a positive integer less than or equal to N.

The system information block concerned by the terminal is sent to the base station, so that the base station can inform the terminal when the second system information block concerned by the terminal needs to be updated, and does not need to inform the terminal when the second system information block not concerned by the terminal needs to be updated.

In addition, the terminal sends the capability information related to the system information block to the base station, so that the base station can send the system information according to the capability of the terminal, and further resource waste is avoided.

The SI subscription information is similar to that in the method 100, and is not described herein again for brevity.

The system information blocks of interest to the terminal need to be updated or ETWS/CMAS information is discovered 230.

If the terminal has the capability of ETWS/CMAS information, when the system information block concerned by the terminal needs to be updated, or when warning information such as ETWS/CMAS is found, the base station sends the received information or the updated system information block to the terminal.

240, the base station sends a dedicated RRC signaling to the terminal, where the signaling carries a system information block that needs to be updated and is concerned by the terminal.

The base station may transmit the system information block that needs to be updated through RRC signaling. The method is particularly effective when the number of connected terminals on active BWP is small, the implementation is simple, the change to the existing protocol is small, and the base station does not need to send paging messages on the active BWP, thereby saving the paging expense.

The specific effective time of the system information block needing to be updated is as described in the above method, and is not described herein again.

It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

According to the embodiment of the application, the base station acquires the system information block concerned by the terminal, so that when the system information block needs to be updated or warning information is received, the system information block concerned by the terminal only needs to be sent to the terminal, and the system information not concerned by the terminal does not need to be sent to the terminal, so that the waste of resources can be avoided.

In addition, in the embodiment of the present application, the time for updating the system information block by the base station and the terminal is kept consistent, for example, the effective time may be determined based on an agreement, or the effective time of the system information that needs to be updated is also sent to the terminal by the base station, so that the system information of the base station and the terminal is kept synchronized.

It is to be understood that, in the above embodiments of the method, the method and the operation implemented by the terminal may also be implemented by a component (e.g., a chip or a circuit) available to the terminal, and the method and the operation implemented by the base station may also be implemented by a component (e.g., a chip or a circuit) available to the base station.

Having described the method of communication in detail above according to an embodiment of the present application, a communication apparatus according to an embodiment of the present application will be described below.

Fig. 9 is a schematic diagram of a communication device according to an embodiment of the present application. The communication apparatus may correspond to a base station or a component that may be used for a base station in the embodiments of the methods.

As shown in fig. 9, the communication device includes a transceiver 910.

Alternatively, the transceiver 910 may be a Remote Radio Unit (RRU), a transceiver unit, a transceiver, or a transceiver circuit, etc.

In one possible approach, the transceiver 910 may include at least one antenna and a radio frequency unit, and the transceiver 910 may be used for transceiving radio frequency signals and converting the radio frequency signals to baseband signals.

Optionally, the communication apparatus may include a baseband unit (BBU) including a processor, and the baseband unit may be configured to perform baseband processing, such as channel coding, multiplexing, modulation, spreading, and the like, and control network devices. The transceiver 910 and the baseband unit may be physically disposed together or may be physically disposed separately, i.e., distributed network devices.

In an example, the baseband unit may be formed by one or more boards, and the boards may jointly support a radio access network of a single access system, or may respectively support radio access networks of different access systems.

The baseband unit includes a processor. The processor may be configured to control the communication device to perform the respective operations in the foregoing method embodiments.

Optionally, the communication device may also include a memory to store the necessary instructions and data.

In one embodiment, the processor 920 is configured to determine M system information blocks, where M is a positive integer.

The transceiver 910 is configured to: sending first information to a terminal, where the first information includes the M system information blocks, and the M system information blocks include at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time related information.

Optionally, the transceiver 910 is configured to send, to the base station, second information before sending the first information to the terminal, where the second information includes information related to N system information blocks, and the N system information blocks are subscribed system information blocks, where N is a positive integer.

Optionally, the second information includes indexes of the N system information blocks and/or capability information related to T system information blocks, where T is a positive integer less than or equal to N.

Optionally, the N system information blocks include the first system information block.

Optionally, the second information further includes a time precision, and the time precision is related to a transmission period of the first system information block; the processor 920 is configured to: and determining the sending period of the first system information block according to the time precision.

Optionally, the first information further includes an effective time of the M system information blocks, and the effective time is a time when the M system information blocks are updated and/or applied.

Optionally, the first information is carried in radio resource control, RRC, signaling.

Optionally, the transceiver 910 is further configured to: before sending the first information to the terminal, the method includes: and sending a paging message to the terminal, wherein the paging message carries notification information of the information related to the time.

Optionally, the transceiver 910 is further configured to: before the sending of the first information to the terminal, the method includes: and sending indication information to the terminal, wherein the indication information is used for indicating the terminal to monitor paging messages in a public search space, and the public search space can transmit the first information.

Optionally, the common search space is located on a common bandwidth part BWP, the common BWP being capable of transmitting the first information, the common BWP being located where at least two BWPs overlap, the two BWPs being used by two terminals; the transceiver 910 is specifically configured to: transmitting first information to the terminal on the common BWP.

By the embodiment of the application, the base station is enabled to acquire the system information block in which the terminal is interested, so that the base station can send the feedback information of the system information block in which the terminal is interested to the terminal when the system information in which the terminal is interested is updated or needs to be updated, and all the system information in the system information which needs to be updated is not required to be sent to the terminal, thereby saving resources.

In addition, the base station and the terminal can determine the effective time according to the type of the system information by appointing the effective time of the system information to be updated, so that the system information of the base station and the system information of the terminal are kept consistent.

In another embodiment, the processor 920 may be configured to: determining a common BWP, the common BWP being located at a position where at least two BWPs overlap, the two BWPs being used by two terminals; the transceiver 910 transmits paging information and/or system information to at least one of the at least two terminals through the common BWP.

Optionally, the configuration parameters of the common BWP include at least: identity, frequency domain resources, bandwidth, subcarrier spacing.

According to the embodiment of the application, the public resources which can serve for the plurality of terminals are configured at the overlapped part, so that the waste of the resources can be avoided, and the resources are saved.

Fig. 10 is a schematic diagram of a communication device according to another embodiment of the present application. The communication means may correspond to the terminal or a component available for the terminal in the respective method embodiments.

As shown in fig. 10, the communication device includes a transceiver 1010 and a processor 1020.

Optionally, the transceiver 1010 may include a control circuit and an antenna, wherein the control circuit may be used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals, and the antenna may be used for transceiving radio frequency signals.

Optionally, the communication device may also comprise other main components of the terminal, such as memory, input output devices, etc.

The processor 1020 may be configured to process the communication protocol and the communication data, and control the entire communication apparatus, execute a software program, and process data of the software program, for example, to support the communication apparatus to perform corresponding operations in the foregoing method embodiments. The memory is used primarily for storing software programs and data. When the communication device is powered on, the processor 1020 may read the software program stored in the memory, interpret and execute the instructions of the software program, and process the data of the software program.

In one embodiment, the transceiver 1010 is configured to: receiving first information from a base station, the first information comprising M system information blocks, the M system information blocks comprising at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time-related information, wherein M is a positive integer; the processor 1020 is configured to: the first information is processed.

Optionally, before the transceiver 1010 sends the first information to the base station, sending second information to the base station, where the second information includes information related to N system information blocks, where the N system information blocks are subscribed system information blocks, and N is a positive integer.

Optionally, the second information includes indexes of the N system information blocks and/or capability information related to T system information blocks, where T is a positive integer less than or equal to N.

Optionally, the capability information related to the T system information blocks includes: the terminal is capable of processing the T system information blocks.

Optionally, the N system information blocks include the first system information block.

Optionally, the second information further includes a time precision, and the time precision is related to a transmission period of the first system information block.

Optionally, a processor 1020, the processor 1020 configured to: determining the effective time of the M system information blocks according to the types of the M system information blocks, wherein the effective time is the time for updating and/or applying the M system information blocks.

Optionally, the processor 1020 may be configured to: when the first information comprises a first-class system information block, determining that the first-class system information block is directly effective, wherein the first-class system information block at least comprises at least one of the following three information: the first system information block, information of an earthquake and tsunami warning system ETWS and information of a commercial mobile warning system CMAS; or, when the first information includes a second type system information block, determining that the information of the second type system information block is effective in a next modification period, wherein the second type system information block includes the updated second system information block; or, when the first information includes a second type system information block, determining that the information of the second type system information block is effective at a first transmission opportunity corresponding to the second type system information block in a next modification period.

Optionally, the first information further includes an effective time of the M system information blocks, and the effective time is a time when the M system information blocks are updated and/or applied.

Optionally, the first information is carried in radio resource control, RRC, signaling.

Optionally, the transceiver 1010 is further configured to: before receiving the first information from the base station, the method comprises the following steps: and detecting a paging message, wherein the paging message carries notification information of the information related to the time.

Optionally, the transceiver 1010 is further configured to: before the receiving the first information from the base station, the method includes: receiving indication information from the base station, wherein the indication information is used for indicating that paging messages are monitored in a public search space, and the public search space can transmit the first information; the transceiver 1010 is specifically configured to: and monitoring the paging message and receiving first information from the base station on the public search space.

Optionally, the common search space is located on a common bandwidth part BWP, the common BWP being capable of transmitting the first information, the common BWP being located where at least two BWPs overlap, the two BWPs being for use by two terminals.

The embodiment of the application also provides a processing device, which comprises a processor and an interface;

the processor is configured to perform the method in the various embodiments of the present application.

The processing device may be a chip, the processor may be implemented by hardware or may be implemented by software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated in the processor, located external to the processor, or stand-alone.

For example, the processing Device may be a Field-Programmable Gate Array (FPGA), an Application-Specific Integrated Circuit (ASIC), a System on Chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a Digital signal processing Circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other Integrated chips.

The embodiment of the application also provides a communication device, which comprises a processing module and a transceiver module. The processing module and the transceiver module may be implemented in software or hardware. The processing module may implement the function or operation corresponding to the processor 920 in fig. 9, and the transceiver module may implement the function or operation corresponding to the transceiver 910 in fig. 9; alternatively, the processing module may implement the functions or operations corresponding to the processor 1020 in fig. 10, and the transceiver module may implement the functions or operations corresponding to the transceiver 1010 in fig. 10.

It is understood that the modules in the communication device may be provided separately or integrated together. The above-described respective modules may also be referred to as components or circuits.

It is to be understood that the above-mentioned communication means may be implemented by at least one processor, by at least one processor and at least one memory, by at least one processor and at least one transceiver, and by at least one processor and at least a transceiver and at least one memory. The processor, transceiver and memory described above may be provided separately or may be integrated together.

It should be noted that, for the operation or implementation of each module described above, reference may be further made to the relevant description in the method embodiment.

The embodiment of the application also provides a communication system, which comprises the network equipment and the terminal.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (20)

1. A method of communication, comprising:

receiving first information from a base station, the first information comprising M system information blocks, the M system information blocks comprising at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time-related information, wherein M is a positive integer;

processing the first information and determining the validation times of the M system information blocks according to the types of the M system information blocks, or determining the validation times of the M system information blocks according to the validation times of the M system information blocks included in the first information,

wherein the validation time is a time to update and/or apply the M system information blocks.

2. The communication method according to claim 1, wherein before said receiving the first information from the base station, further comprising:

and sending second information to the base station, wherein the second information comprises information related to N system information blocks, the N system information blocks are subscribed system information blocks, and N is a positive integer.

3. The communication method according to claim 2, wherein the second information comprises indexes of the N system information blocks and/or capability information related to T system information blocks, wherein T is a positive integer less than or equal to N.

4. The communication method according to claim 3, wherein the capability information related to the T system information blocks comprises: the terminal is capable of processing the T system information blocks.

5. The communications method of claim 2, wherein the N system information blocks include the first system information block.

6. The communication method according to claim 5, wherein the second information further comprises a time precision, and the time precision is related to a transmission period of the first system information block.

7. The communication method according to claim 1, wherein said determining the effective time of the M system information blocks according to the types of the M system information blocks comprises:

when the first information comprises a first system information block, determining that the first system information block is directly effective, wherein the first system information block comprises at least one of the following: the first system information block, information of an earthquake and tsunami warning system ETWS and information of a commercial mobile warning system CMAS; or

When the first information comprises a second system information block, determining that the second system information block takes effect in the next modification period, wherein the second system information block comprises the updated second system information block; or

And when the first information comprises a second type system information block, determining that the first transmission opportunity corresponding to the second type system information block takes effect in the next modification period.

8. The communication method according to any one of claims 1 to 6, wherein the first information includes an effective time of all or a part of the M system information blocks.

9. The communication method according to any of claims 1 to 7, wherein the first information is carried in radio resource control, RRC, signaling.

10. The communication method according to any of claims 1 to 7, wherein the receiving the first information from the base station comprises:

and detecting a paging message, wherein the paging message carries notification information of the information related to the time.

11. A method of communication, comprising:

determining M system information blocks, wherein M is a positive integer;

sending first information to a terminal, where the first information includes the M system information blocks, and the M system information blocks include at least one of: a first system information block, warning information, an updated second system information block, the first system information block being a system information block comprising time related information;

wherein the first information further includes an effective time of the M system information blocks, and the effective time is a time for updating and/or applying the M system information blocks.

12. The communication method according to claim 11, wherein before said sending the first information to the terminal, comprising:

receiving second information from the terminal, the second information including information related to N system information blocks, the N system information blocks being system information blocks to which the terminal subscribes, wherein N is a positive integer.

13. The communication method according to claim 12, wherein the second information comprises indexes of the N system information blocks and/or capability information related to T system information blocks, where T is a positive integer less than or equal to N; and

the sending the first information to the terminal includes:

and sending the first information to a terminal based on the N system information blocks.

14. The communications method of claim 13, wherein the capability information associated with the T system information blocks comprises: the terminal is capable of processing the T system information blocks.

15. The communications method of claim 12, wherein the N system information blocks include the first system information block.

16. The communication method according to claim 15, wherein the second information further includes a time precision, the time precision being related to a transmission period of the first system information block;

and determining the sending period of the first system information block according to the time precision.

17. The communications method according to any of claims 11 to 16, wherein the first information is carried in radio resource control, RRC, signaling.

18. The communication method according to any one of claims 11 to 16, wherein before the sending the first information to the terminal, the method comprises:

and sending a paging message to the terminal, wherein the paging message carries notification information of the information related to the time.

19. A communications apparatus, comprising:

a processor for executing a computer program stored in the memory to cause the apparatus to perform the method of any of claims 1 to 18.

20. A computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1 to 18.

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