CN108271268B

CN108271268B - System message transmission method and device, system message receiving method and device, and terminal

Info

Publication number: CN108271268B
Application number: CN201611258086.3A
Authority: CN
Inventors: 张银成
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2023-06-20
Anticipated expiration: 2036-12-30
Also published as: WO2018121449A1; CN108271268A

Abstract

The invention discloses a transmission method, a system, a receiving method, a device and a terminal of a system message. The transmission method comprises the following steps: dividing the system information into MIB, residual Minimum SI and Other SI in advance; the MIB comprises broadcast indication information of which system information blocks SIB in the Other SI need to be broadcast; the residual Minimum SI comprises scheduling information of SIB broadcasted in the Other SI; and broadcasting corresponding SIB in the Other SI in the third broadcast channel according to the broadcast indication information and the scheduling information. In the technical scheme of the invention, the scheduling information of the information blocks in Other SI is relatively stable, so that the content of the residual Minimum SI is relatively stable, and the transmission of the residual Minimum SI is facilitated.

Description

System message transmission method and device, system message receiving method and device, and terminal

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting and receiving a system message, a method, an apparatus, and a terminal.

Background

Cellular mobile communication technology has been developed for decades, and has entered the 4G (fourth generation mobile communication technology) era, and in order to meet the communication demands of higher, faster and newer in the future, the industry has been developing a study on the 5G (fifth generation mobile communication technology) technology in the future. 5G will conduct further technical research in terms of greater throughput, more user connections, lower latency, higher reliability, lower power consumption (including network side devices and user terminals). Currently, the industry proposes 5G technology targets: by 2020, a 1000-fold increase in mobile data traffic per area, a 10-to-100-fold increase in throughput per User Equipment (UE), a 10-to-100-fold increase in the number of connected devices, a 10-fold increase in battery life for low power devices, and a 5-fold decrease in end-to-end delay is achieved.

Among them, in order to reduce power consumption of system devices and provide radio resource utilization, researches are being made on a system information (SI, system Information) propagation mechanism that has been widely adopted in 2G (GSM), 3G (WCDMA & TS-SCDMA) and 4G (LTE). In 2G,3G and 4G mobile communication systems, the transmission mechanisms of system information are generally relatively similar, with some differences in detail; the common characteristics are as follows:

each cell transmits complete system information in a broadcast (broadcast) manner;

the system information is divided into a plurality of system information blocks SIB (System Information Block) by features and functions;

from the viewpoint of the configuration of information such as resources and control parameters used for broadcasting, there are generally adopted 3 modes of fixed configuration (predefined), pre-configuration and dynamic allocation. Wherein fixed configuration (predefined) generally refers to configuration information in which the system explicitly defines relevant resources and control parameters in some form (e.g., standard specification); dynamic scheduling generally means that configuration information of related resources and control parameters is dynamically sent to a receiver through a physical layer channel, and the related configuration information is only valid in a time range defined by dynamic scheduling; pre-configuration generally means that the relevant resources and control parameters are configurable and that its configuration information is sent to the receiver in the form of layer 2 and layer 3 messages, which is valid as long as the sender is not updated. The configuration information in the pre-configuration mode is also commonly referred to as scheduling information, in 3G and 4G systems, the resources and control parameters related to the system information block MIB (Main Information Block) are in a fixed (predefined) configuration mode, the resources and control parameters related to SIB1 in 4G are in a combination of fixed and dynamic allocation mode, all or part of the resources and control parameters related to other SIBs in 3G and 4G are in a pre-configuration mode, the configuration information related to the SIBs in the pre-configuration mode is included in the scheduling information, wherein the scheduling information of 3G is sent through MIB or a dedicated SB (scheduling block), and the scheduling information of 4G is sent through SIB 1.

The scheduling information includes resources and control information related to each SIB broadcast, such as time domain, including a transmitting time point (or window), a transmitting period and the like, and each SIB is continuously and periodically broadcast and transmitted according to the scheduling information;

from the UE usage point of view, almost all the effective range of system information is limited to only the cell it transmits, i.e. when the UE moves from one cell and reselects to another, the system information transmitted by the new cell needs to be received again completely at the new cell.

Under the system information transmission mechanism, with the continuous introduction of new technologies, transmission blocks are continuously increased, the content of system information is continuously increased, and consumed resources are continuously increased. Moreover, the number of opportunities for which transport blocks for a particular new technology are actually required is relatively limited, and the continual broadcast transmissions result in wasted resources and increased power consumption of network-side devices.

Disclosure of Invention

The invention aims to solve the technical problems of resource waste and power consumption increase caused by continuous broadcasting of system messages in the prior art by providing a transmission method and a device, a receiving method, a device and a terminal of the system messages.

In order to solve the technical problems, in one aspect, the present invention provides a method for transmitting a system message, where the system message is divided into a first system message and a second system message, and the first system message is further divided into a third system message and a fourth system message; the method comprises the following steps:

The third system message is sent through a first broadcast channel; the third system message comprises broadcast indication information of a system information block SIB in the second system message broadcast in a third broadcast channel;

the fourth system message is sent through a second broadcast channel; the fourth system message comprises scheduling information of SIB in the second system message broadcasted in the third broadcast channel;

and broadcasting corresponding SIB in the second system message in the third broadcast channel according to the broadcast indication information and the scheduling information.

Further, the scheduling information includes one or more configuration information for transmitting the SIB in the second system message.

Further, when the scheduling information includes a plurality of configuration information, the third system message further includes scheduling information index information indicating one type of configuration information employed in the plurality of configuration information.

Further, the SIB in the third system message and the SIB in the second system message are sent in a beam scanning mode, wherein a preset association relationship exists between the beam scanning configuration information of the third system message and the beam scanning configuration information of the second system message.

Further, according to the association relationship between the beam scanning configuration information of the third system message and the beam scanning configuration information of the second system message, different or same broadcast indication information is sent in the scanning blocks of the third system message;

and broadcasting and transmitting SIB in the second system message indicated by the broadcast indication information in the corresponding scanning blocks of each second system message according to the beam scanning configuration information, the broadcast indication information and the scheduling information.

Further, the beam scanning configuration information is used for configuring a scanning block and a scanning array, wherein the beam scanning configuration information at least comprises:

the number of scanning blocks and/or the identification information of the scanning blocks are included in one scanning array; and/or the number of the groups of groups,

the number of beams and/or beam identification information included in one scan block.

Further, the first, second and third broadcast channels are physical channels with different time domains, frequency domains and/or code domains.

Further, the second system message is transmitted by means of dedicated signaling, broadcasting or multicasting.

In another aspect, the present invention further provides a method for receiving a system message, including:

Receiving a third system message through a first broadcast channel, and acquiring broadcast indication information of a system information fast SIB (information block) broadcasted in the third broadcast channel from the third system message;

and receiving corresponding SIB in the third broadcast channel according to the broadcast indication information.

Further, receiving a fourth system message over a second broadcast channel before the third broadcast channel receives the corresponding SIB; and acquiring scheduling information of SIB (information block) broadcasted in the third broadcast channel from the fourth system message, and receiving corresponding SIB in the third broadcast channel according to the broadcasting indication information and the scheduling information.

Further, the scheduling information index information is obtained from the third system message, and further, configuration information adopted by the cell for transmitting the SIB is determined from the scheduling information.

Further, a beam scanning mode is adopted to receive SIB in the third system message and the second system message, wherein the beam scanning configuration information of the second system message is determined according to the beam scanning configuration information of the third system message.

Further, according to the beam scanning configuration information, the scheduling information and the broadcast indication information received in one or more scanning blocks of the third system message, SIBs in the second system message are received in one or more scanning blocks of the corresponding second system message.

In still another aspect, the present invention further provides a system message transmission device, including:

the control module is used for dividing the system message into a first system message and a second system message in advance, wherein the first system message is further divided into a third system message and a fourth system message; the third system message comprises broadcast indication information of a system information block SIB in the second system message broadcast in a third broadcast channel; the fourth system message comprises scheduling information of SIB in the second system message broadcasted in the third broadcast channel; the control instruction is used for sending out corresponding SIB in the second system information broadcast by the third broadcast channel according to the broadcast indication information and the scheduling information;

a transmitting module for transmitting the third system message through a first broadcast channel; transmitting the fourth system message through a second broadcast channel; and broadcasting corresponding SIBs in the second system message in the third broadcast channel according to the control instruction.

Further, when the scheduling information includes a plurality of configuration information, the control module further sets scheduling information index information in the third system message, where the scheduling information index information is used to indicate one type of configuration information adopted in the plurality of configuration information.

Further, the sending module sends the third system message and the SIB in the second system message in a beam scanning manner, where a preset association relationship exists between beam scanning configuration information of the third system message and beam scanning configuration information of the second system message.

Further, the control module controls the sending module to send different or same broadcast indication information in the third system message of each scanning block according to the association relation between the beam scanning configuration information of the third system message and the beam scanning configuration information of the second system message;

and the control module controls the sending module to broadcast and send SIB in the second system message which is indicated to be sent by the broadcast indication information in the second system message corresponding to each scanning block according to the beam scanning configuration information, the broadcast indication information and the scheduling information.

In still another aspect, the present invention further provides a device for receiving a system message, including:

a receiver for receiving a third system message through a first broadcast channel;

a controller for acquiring the broadcast indication information of the system information fast SIB broadcasted in the third broadcast channel from the third system message; and controlling the receiver to receive the corresponding SIB in the third broadcast channel according to the broadcast indication information.

Further, the receiver also receives a fourth system message over a second broadcast channel before the third broadcast channel receives the corresponding SIB;

the controller acquires the scheduling information of the SIB broadcasted in the third broadcast channel from the fourth system message, and controls the receiver to receive the corresponding SIB in the third broadcast channel according to the broadcasting indication information and the scheduling information.

Further, the controller acquires scheduling information index information from the third system message, and further determines configuration information adopted by the cell for transmitting the SIB from the scheduling information.

Further, the receiver receives the SIB in the third system message and the SIB in the second system message in a beam scanning manner, where the beam scanning configuration information of the second system message is determined according to the beam scanning configuration information of the third system message.

Further, the controller controls the receiver to receive the SIB in the second system message in the corresponding one or more scanning blocks according to the beam scanning configuration information, the scheduling information and the broadcast indication information in the third system message received in the one or more scanning blocks.

In still another aspect, the present invention further provides a terminal, which receives a system message through a system message receiving device, where the receiving device includes:

The invention has the following beneficial effects:

in the technical scheme of the invention, the scheduling information of the information block in the Other SI is relatively stable and does not change along with the change of the broadcast content of the Other SI, thereby ensuring the relatively stable content of the residual Minimum SI and being beneficial to the transmission of the residual Minimum SI; meanwhile, when the UE monitors and reads the Other SI content, the UE does not need to read the scheduling information related to the Other SI in the residual Minimum SI each time, and only needs to monitor and read the broadcast indication of the Other SI in the MIB and broadcast the Other SI, so that the power consumption of the UE is reduced.

Drawings

FIG. 1 is a schematic diagram of a system message structure in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a broadcast transmission mechanism of a system message block in Other SI according to an embodiment of the present invention;

fig. 3 is a network deployment schematic diagram of an independent cell in embodiment 1 of the present invention;

fig. 4 is a schematic diagram of network deployment of cascade coverage of multiple co-frequency cells in embodiment 2 of the present invention;

fig. 5 is a schematic diagram of network deployment of co-frequency/inter-frequency cell overlapping coverage in embodiment 3 of the present invention;

fig. 6 is a schematic diagram of broadcasting indication information in an embodiment of the present invention;

fig. 7 is a schematic diagram of a message transmitted by a beam scanning technique according to embodiment 4 of the present invention;

fig. 8 is a networking schematic diagram of transmitting a system message through a beam scanning technique according to embodiment 4 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the following embodiments, the following concepts are used for the sake of convenience and reference to the concepts existing in the background art: the minimum system information is the first system information, the other system information is the second system information, the master information block MIB is the third system information, and the remaining minimum system information is the fourth system information.

Aiming at the problems, the embodiment of the invention discloses a novel system information transmission method, which mainly comprises the following technical contents:

as shown in fig. 1, system information is divided into two main categories according to the importance degree of the information:

one type is necessary system information, which is called Minimum system information (Minimum SI) in this patent, and is still transmitted by adopting a broadcasting mechanism; the Minimum SI generally includes very critical system information related to cell selection and initial access (including acquisition of Other SI), etc., which needs to be transmitted in a periodically broadcast manner, so that information that needs to be broadcast and transmitted is greatly compressed.

The Other is all Other system information except the minimum system message, which is called Other system information (Other SI) in this patent. Other system information is transmitted according to a request of a User Equipment (UE) or a requirement of a network side base station device (e.g., node B), and may be transmitted in a dedicated signaling (dedicated signalling), broadcast (broadcast) or multicast (multicast) manner, instead of continuously and periodically, so as to improve resource utilization efficiency.

For both types of system information described above, a structure is still used that is divided into a plurality of system information blocks SIB by feature and/or function.

Wherein the Minimum SI is further divided into MIB and residual Minimum SI; the MIB, the residual Minimum SI and the Other SI are respectively transmitted through different broadcast channels, the MIB is transmitted through a first broadcast channel, the residual Minimum SI is transmitted through a second broadcast channel, and the Other SI is transmitted through a third broadcast channel; the first, second and third broadcast channels may be physical channels with the same name but different resources such as time domain, frequency domain and/or code domain.

Scheduling information of SIB (information block) broadcasted by Other SI on a third broadcast channel is broadcasted on a second broadcast channel through the residual Minimum SI; that is, the information related to transmission, such as physical channels, broadcast times, etc., used in transmitting SIBs that need to be broadcast in Other SI, is broadcast on the second broadcast channel.

Broadcast indication information of whether any SIB in the Other SI is being broadcast on the third broadcast channel is broadcast on the first broadcast channel through the MIB.

In addition, the scheduling information in the residual Minimum SI comprises one or more configuration information for transmitting SIB; when there are multiple configuration information, the MIB also includes scheduling information index information of the Other SI, which is used to indicate the Other SI scheduling information being used by the cell.

For the broadcast transmission mode, as shown in fig. 2, the schematic diagram of the broadcast transmission mechanism of the Other SI is as follows:

The SI windows are transmitted based on, the concept of SI windows is similar to LTE, i.e. some periodic SI windows are predefined in the form of scheduling information, in which SIBs of Other SI will be broadcast. The SI window includes a transmission window and a window period, which are defined by time and/or radio frames, and time domain concepts such as subframes or time slots; wherein the setting of the transmission window includes a start point and a window length, or a start point and an end point, and the window period includes a period length.

In embodiments below this patent, MIB is a separate system information block, the remaining Minimum SI includes two information blocks of SIB1 and SIB2 and one common information block, and Other SI includes SIB3/4/5/6/7 for a total of 5 information blocks. Wherein, the scheduling information of Other SI can be selected from 1-2 configurations, wherein the first configuration comprises only one SI window, and all SIBs of SIB3/4/5/6/7 are mapped into the same SI window; the second configuration is to include two SI windows, where SIB3/4 maps to SI window 1 and SIB5/6/7 maps to SI window2. Accordingly, an Other SI scheduling information index field is optionally included in the MIB to indicate the effective Other SI scheduling information configuration option used by one cell.

It should be noted that the transmission method of the system message in this patent is also applicable to the transmission of the multicast message. In addition, the embodiment of the present patent only provides two configuration examples, which are only for illustrating the scheme of the present patent, but not limited to the two examples, and one, two or more SI windows may be configured.

Example 1

As shown in fig. 3, in the case of network deployment of an independent cell, all system information is broadcast by the cell itself, including: the MIB is transmitted through a first broadcast channel, the remaining Minimum SI is transmitted through a second broadcast channel, the Other SI is transmitted through a third broadcast channel, the first and third broadcast channels are shown by a dash-dot line, and the second broadcast channel is shown by a dashed line.

Wherein SIB1/SIB2 has only one configuration, at this time, relevant fields such as SI index and SI index value will not be needed. The scheduling information configuration of Other SI only configures the first configuration, i.e. only one SI window, and SIB3/4/5/6/7 (all SIBs) are mapped into the same SI window; at this time, since there is only one configuration, the Other SI scheduling information index field in the MIB will not be needed.

As shown in fig. 3, for the independent cell, the transmission method of the system message includes:

Transmitting a MIB and a residual Minimum SI through a first broadcast channel and a second broadcast channel, wherein the MIB comprises broadcast indication information of Other SI; scheduling information of Other SI is included in the Minimum SI;

specific: if the user terminal requests to send some SIB in Other SI and determines to send by broadcasting, as shown in FIG. 6, SIB3 and SIB5 are required to be sent, setting the corresponding indication bit of SIB3 and SIB5 in the broadcasting indication information of Other SI in MIB as 1 and sending through the first broadcasting channel;

and according to the scheduling information of the Other SI, SIB3 and SIB5 are sent in the corresponding SI window through a third broadcast channel.

For a UE camping on this cell, receiving a system message includes:

receiving MIB information of a resident cell through a first broadcast channel of the cell;

the remaining Minimum SI information received through the second broadcast channel of the camping cell includes the above-mentioned Other SI scheduling information.

When the UE needs to detect whether SIBs of some Other SIs are broadcasting and receive these SIBs, the procedure is:

for the terminal requesting the base station to send the system message, the terminal directly detects and receives the SIB of the Other SI through the third broadcast channel in the corresponding SI window according to the scheduling information of the Other SI and the SIB of the Other SI required by the scheduling information.

For Other terminals, receiving the MIB on the first broadcast channel, and checking whether an indication bit corresponding to the SIB required by Other terminals in Other information of the SIB broadcast indication information is 1; if not, sending a request for broadcasting a system message; if yes, receiving the SIB of the Other SI in the corresponding SI window through a third broadcast channel according to the scheduling information of the Other SI and the SIB of the Other SI required by the scheduling information.

The broadcast indication information of Other SI may be a bitmap indication, as shown in fig. 6, and if a SIB is being broadcast, the broadcast indication bit corresponding to the SIB is set to 1, and as shown in fig. 6, SIB3 and SIB5 are being broadcast.

In this embodiment, SIBs of all Other SIs are mapped to the same SI window, so SIB3 and SIB5 may be received through a third broadcast channel according to configuration information of the SI window.

As long as the SI window configuration information is not changed, the UE does not need to receive the scheduling information of Other SI in the rest Minimum SI, and can receive the broadcasted Other SI.

Example 2

As shown in fig. 4, in the network deployment situation of cascade coverage of multiple on-channel cells, where each cell sends MIB and Other SI through respective first/third broadcast channels, several of them (the cell where the gray base station is located in the figure) are selected to send common remaining Minimum SI in SFN (Single Frequency Network, single-frequency network), where configuration information of 2 groups of SIB1/SIB2 is included, and the Other SI scheduling information includes configuration in 2: first kind: all SIBs in 1 SI window, SIB3/4/5/6/7 map to the same SI window; second kind: 2 SI windows, where SIB3/4 maps to SI window1 and SIB5/6/7 maps to SI window 2.

In order to realize the broadcast in the SFN mode, all the base stations for performing SFN transmission must transmit the same residual Minimum SI, so the common residual Minimum SI needs to be transmitted to all the cells for performing SFN transmission, such as the cell in which the gray base station in fig. 4 is located, or the same common residual Minimum SI is configured for all the base stations for performing SFN transmission.

Among the multiple co-frequency cells, at a certain moment, different cells may need to transmit SIBs in different Other SIs, and may need to select different Other SI scheduling information configurations, as shown in fig. 4, cell M selects a first Other SI scheduling information configuration, and cell N selects a second Other SI scheduling information configuration. Therefore, in addition to broadcasting the Other SI broadcast indication information, the MIB on the first broadcast channel of each cell needs to broadcast the selected Other SI scheduling information index information.

As shown in fig. 4, for a base station (possibly including a plurality of base stations) on a network side, a transmission method of a system message includes:

the respective MIB is sent via the first broadcast channel of each cell, where the MIB includes the Other SI scheduling information index of the cell selection, for example, cell M in fig. 4 selects and sets the first Other SI scheduling information index, and cell N selects and sets the second Other SI scheduling information index.

The common residual Minimum SI is configured, a plurality of cells, such as the cell where the gray base station is located in fig. 4, are selected, the common residual Minimum SI is synchronized among the plurality of cells (i.e. the content is kept the same), and the common residual Minimum SI is sent on a second broadcast channel in the selected plurality of cells in an SFN mode, wherein the scheduling information of the Other SI is included.

If a certain cell, such as cell M and cell N in fig. 4, is requested to send certain SIBs of Other SI by (user terminal) and determines to send by broadcast, as shown in fig. 6, SIB3 and SIB5 are required to be sent, cell M and cell N respectively set indication bits corresponding to SIB3 and SIB5 in the Other SI broadcast indication information in their respective MIB to 1, and send them through their respective first broadcast channels.

Each cell respectively transmits SIB3 and SIB5 in the corresponding SI window through the respective third broadcast channel according to the respective selected Other SI scheduling information and the broadcast transmitted SIB of the Other SI. SIB3 and SIB5 are transmitted in the unique SI window as in cell M, SIB3 in SI window 1 and SIB5 in SI window 2 in cell N.

For a UE camping on a certain cell, receiving a system message includes:

Receiving MIB information of a resident cell through a first broadcast channel of the cell, wherein the MIB information comprises Other SI scheduling information indexes;

the common remaining Minimum SI is received over the second broadcast channel in SFN, including Other SI scheduling information.

The procedure when the UE needs to detect if SIBs in some Other SIs are broadcasting and receive these SIBs is:

for a terminal requesting a base station to send a system message in a resident cell, the Other SI is directly detected and received through a third broadcast channel in a corresponding SI window according to the scheduling information of the Other SI and SIBs of the Other SI required by the scheduling information.

Or alternatively, the process may be performed,

for Other terminals in a resident cell, receiving the MIB on a first broadcast channel, checking whether an indication bit corresponding to a SIB required by the Other terminals in the resident cell in the Other terminals is 1, and if not, requesting the base station to issue a system message required by the Other terminals in the resident cell; if yes, determining Other SI scheduling information of cell selection according to the Other SI scheduling information index;

and receiving the Other SI in the resident cell through a third broadcast channel in the corresponding SI window according to the Other SI scheduling information selected by the cell and the SIB of the Other SI required by the cell.

The Other SI broadcast indication information may be a bitmap indication, as shown in fig. 6, and if a SIB is being broadcast, the broadcast indication bit corresponding to the SIB is set to 1, and as shown in fig. 6, SIB3 and SIB5 are being broadcast.

In this embodiment, as shown in fig. 4, in cell M, the UE receives SIB3 and SIB5 in a unique SI window; in cell N, the UE receives SIB3 in SI window 1 and SIB5 in SI window 2.

Also, since a certain cell can select one type of use according to the configured scheduling information of multiple Other SIs, and the change of SIB included in the broadcast Other SIs will not affect the change of the scheduling information of Other SIs in the remaining Minimum SIs, so that the remaining Minimum SIs is relatively stable, and thus the SFN technology is beneficial to sending the remaining Minimum SIs through the second broadcast channel.

Example 3

As shown in fig. 5, in the case of network deployment where co-frequency/inter-frequency cells overlap, each cell transmits MIB and Other SI through a respective first/third broadcast channel; and transmitting the public residual Minimum SI in the macro cell, wherein the public residual Minimum SI comprises configuration information of 2 groups of SIB1/SIB2, and the Other SI scheduling information comprises configuration in 2: first, 1 SI window, SIB3/4/5/6/7 all SIBs map into the same SI window; second, 2 SI windows, where SIB3/4 maps to SI window 1 and SIB5/6/7 maps to SI window 2.

Among the multiple cells, at a certain moment, different cells may need to transmit SIBs in different Other SIs, and may need to select different Other SI scheduling information configurations, as shown in fig. 5, small cell 2 selects a first Other SI scheduling information configuration, and small cell 3 selects a second Other SI scheduling information configuration. Therefore, in addition to broadcasting the Other SI broadcast indication information, the MIB on the first broadcast channel of each cell needs to broadcast the selected Other SI scheduling information index information.

As shown in fig. 5, for a base station (possibly including a plurality of base stations) on a network side, the system message transmission method includes:

transmitting a respective MIB through a first broadcast channel of each cell, wherein the MIB includes an Other SI scheduling information index selected by the cell, such as selecting and setting the first Other SI scheduling information index by a small cell 2 in fig. 5, and selecting and setting the second Other SI scheduling information index by a small cell 3;

configuring a public residual Minimum SI, and transmitting the public residual Minimum SI on a second broadcast channel in the macro cell 1, wherein the public residual Minimum SI comprises the Other SI scheduling information;

if a certain cell, such as small cell 2 and small cell 3 in fig. 5, is requested to send certain SIBs of Other SI and determines to broadcast transmission, as shown in fig. 6, is requested to send SIB3 and SIB5, setting indication bits corresponding to SIB3 and SIB5 in Other SI broadcast indication information in respective MIB to 1, and sending the corresponding indication bits through respective first broadcast channels;

Each cell respectively transmits SIB3 and SIB5 in the corresponding SI window through the respective third broadcast channel according to the respective selected Other SI scheduling information and the broadcast transmitted SIB of the Other SI. SIB3 and SIB5 are transmitted in the unique SI window as in small cell 2, SIB3 is transmitted in SI window 1 and SIB5 is transmitted in SI window 2 in small cell 3.

For a UE camping on a certain cell, receiving a system message includes:

the common residual Minimum SI received over the second broadcast channel of macrocell 1 includes Other SI scheduling information.

Then, when the UE needs to detect whether SIBs of some Other SI are broadcasting and receive the SIBs, the procedure is:

Or alternatively, the process may be performed,

for Other terminals in the resident cell, receiving the MIB on the first broadcast channel, checking whether the indication bit corresponding to the SIB required by the Other terminals in the resident cell is 1, and if not, requesting the cell to send the required system information; if yes, determining Other SI scheduling information of cell selection according to the Other SI scheduling information index;

In this embodiment, as shown in fig. 5, in small cell 2, the UE receives SIB3 and SIB5 in a unique SI window; in small cell 3, the UE receives SIB3 in SI window 1 and SIB5 in SI window 2.

Also, since a small cell can select one type of use according to the configured scheduling information of multiple Other SIs, and the change of SIB included in the broadcast Other SIs will not affect the change of the scheduling information of Other SIs in the remaining Minimum SIs, so that the remaining Minimum SIs is relatively stable, and thus the common remaining Minimum SIs is advantageously transmitted through the second broadcast channel of the macrocell 1.

In the above three embodiments, if the broadcast indication information that a certain SIB in the Other SI is being broadcast is also broadcast through the remaining Minimum SI, when the SIB combination broadcasted by the Other SI changes, the change of the remaining Minimum SI is caused; also, if the Other SI scheduling information can be changed without the mechanisms of the various Other SI scheduling information configurations and the Other SI scheduling information indexes in the MIB in this patent, when one cell changes the Other SI scheduling information, the remaining Minimum SI will be changed. In the scenario shown in fig. 4, in the SFN technology, the remaining Minimum SI of a plurality of nodes needs to be kept consistent and synchronized, so when the remaining Minimum SI of one cell changes, the network side needs to use a complex synchronization mechanism to synchronize the content of the remaining Minimum SI among a plurality of nodes, which can cause a large amount of signaling overhead. In the scenario shown in fig. 5, the UE residing in the small cell may be required to read the changed remaining Minimum SI by the second broadcast channel to the macro cell, and then return to the small cell to read the Other SI by the third broadcast channel, which may cause the UE to additionally perform a cell reselection procedure, thereby increasing the power consumption of the UE.

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An important direction of development for 5G mobile communication systems is to use high frequency spectrum with large bandwidth to carry large traffic. Given that the path loss increases exponentially with the increase in frequency as a wireless signal propagates, the coverage of high-frequency mobile communication technology becomes a very fatal problem, i.e., a high-frequency system with a certain transmission power often covers only a small area if the same omni-directional transmission method as that of low frequencies is adopted. To overcome this problem, directional transmission techniques employing beam forming (beam forming) techniques will be used for high frequency wireless signal transmission. The beamforming technology can longitudinally expand the signal coverage in radius, but the coverage in transverse direction is greatly reduced, and the number of beams (beams) that can be simultaneously transmitted by the network side equipment base station is often limited, so for the transmission of broadcast or multicast signals, the beam scanning (beam scanning) technology is simultaneously introduced to meet the requirement of transverse signal coverage. The beam scanning technique may be implemented using time-domain and/or frequency-domain based methods. As shown in fig. 7, a concept of a scanning block (scanning block) is introduced in the time domain, and a beam transmitted in one scanning block covers only a part of a cell, and a plurality of scanning blocks, which are called scanning arrays (scanning bursts), cover the whole cell.

In the above 3 embodiments, if the MIB and the Other SI are both broadcast-transmitted by adopting the beam scanning technique, and the beam scanning configuration information of the Other SI can be uniquely determined according to the beam scanning configuration information of the MIB, the beam scanning configuration information of the Other SI is the same as the beam scanning configuration information of the MIB; the beam scanning configuration information is used for configuring the scanning block and the scanning array, and at least comprises the following components: the number of scan blocks included in a scan array and/or the identification information of the scan blocks, and/or the number of beams included in a scan block and/or the beam identification information. SIB broadcast indication information of the same or different Other SI may be broadcast-transmitted in each scanning block of the MIB. Specifically, if SIB broadcast indication information of the same Other SI is broadcast in each scanning block at the time of MIB broadcast transmission, SIB of the same Other SI is broadcast in each scanning block at the time of Other SI broadcast transmission; if SIB broadcast indication information of a different Other SI is broadcast in each scanning block at the time of MIB broadcast transmission, the SIB of a different Other SI is broadcast accordingly in each scan block when the Other SI is broadcast.

As shown in fig. 8, the system message is sent to the base station at the network side, including:

Transmitting the MIB and the residual Minimum SI through a first broadcast channel and a second broadcast channel, wherein the residual Minimum SI comprises scheduling information of Other SI; meanwhile, it is determined that a beam scanning technique is adopted when the MIB is transmitted, and determining beam scanning configuration information; further, it is determined that the beam scanning technology is also adopted when the Other SI is transmitted, and the beam scanning configuration information transmitted by the Other SI is determined based on the beam scanning configuration information transmitted by the MIB, and is implicitly or explicitly broadcast, where the implicit method is the same as the system predefining, and the display method includes relevant configuration information in the remaining Minimum SI. The present embodiment will be further described with the same beam scanning configuration information that implicitly configures MIB and Other SI.

At the same time of a cell, if different UE requests SIB of different Other SI at the corresponding position of different scanning block, setting different Other SI broadcast indication information in the corresponding MIB of different scanning block and transmitting in the first broadcast channel, for example, UE1 and UE2 request SIB3 and SIB5 of Other SI in scanning block SB#1; UE3 and UE4 request SIB4 and SIB6 of Other SI in a scanning block SB#n; UE5 requested SIB7 of Other SI at scan block sb#m. Then, at the time of MIB beam scanning transmission, SIB3 and SIB5 indicating Other SI are being broadcast are broadcast at scanning block sb#1; broadcast transmission in scan block SB#n indicates that SIB4 and SIB6 of Other SI are being broadcast; the SIB7 broadcast transmission in the scan block SB#M indicates that Other SI is broadcasting.

Correspondingly, according to the scheduling information of the Other SI, SIBs of different Other SIs are corresponding to different scanning blocks, and are sent in a third broadcast channel. Specifically, during Other SI beam scanning transmission, only SIB3 and SIB5 are broadcasted and transmitted in a scanning block SB#1; only broadcasting and transmitting SIB4 and SIB6 in a scanning block SB#n; SIB7 is broadcast-transmitted only in the scan block sb#m.

For a UE camping on this cell, receiving the system message includes:

and receiving MIB information and residual Minimum SI information of the cell through a first broadcast channel and a second broadcast channel of the cell, wherein the MIB information and the residual Minimum SI information comprise Other SI scheduling information, beam scanning configuration information of the MIB and beam scanning configuration information of the Other SI.

receiving MIB of a corresponding scanning block on a first broadcast channel at the position of UE, and checking Other SI broadcast indication information in the MIB to indicate which SIBs are being broadcast; for example, UE1 and UE2 receive broadcast indication information that SIB3 and SIB5 of Other SI are broadcasting in MIB of scan block sb#1; UE3 and UE4 receive broadcast indication information that SIB4 and SIB6 of Other SI are broadcasting in MIB of scanning block SB#n; the UE5 receives the broadcast indication information that SIB7 of Other SI is being broadcast in MIB of scan block sb#m.

Accordingly, according to the scheduling information of the Other SI, the UE1 and the UE2 receive SIB3 and SIB5 of the Other SI in the Other SI of the scanning block SB#1; UE3 and UE4 receive SIB4 and SIB6 of Other SI in Other SI of scanning block SB#n; UE5 receives SIB7 of the Other SI at the Other SI of scan block sb#m.

Example 5

The embodiment of the invention also relates to a system message transmission system, which comprises:

the control module is used for dividing the system information into a Minimum system information block MIB and Other system information block information, wherein the Minimum system information is further divided into a main system information block MIB and a residual Minimum SI; the minimum system message is a system message which needs to be transmitted in a periodical broadcasting mode; the MIB includes broadcast indication information of which system information blocks SIBs in the Other SI need to be broadcast in a third broadcast channel; the residual Minimum SI comprises scheduling information of SIB in the Other SI broadcasted in the third broadcast channel; the control instruction is used for sending out corresponding SIB in the Other SI broadcast by the third broadcast channel according to the broadcast indication information and the scheduling information;

a transmitting module for transmitting the MIB through a first broadcast channel; transmitting the remaining Minimum SI over a second broadcast channel; and broadcasting corresponding SIBs in the Other SI in the third broadcast channel according to the control instruction.

The scheduling information comprises one or more configuration information for transmitting SIB; when the scheduling information comprises various configuration information, the control module is further provided with scheduling information index information in the MIB, wherein the scheduling information index information is used for indicating the piece of configuration information adopted in the various configuration information.

The sending module selects physical channels with different time domains, frequency domains and/or code domains as the first, second and third broadcast channels respectively; the sending module transmits the Other SI by adopting a special signaling, broadcasting or multicasting mode.

In addition, the transmitting module transmits the MIB and the SIB in the Other SI in a beam scanning manner, where a preset association relationship exists between beam scanning configuration information of the MIB and beam scanning configuration information of the Other SI.

The control module controls the sending module to send different or same broadcast indication information in the MIB of each scanning block according to the association relation between the beam scanning configuration information of the MIB and the beam scanning configuration information of the Other SI;

and the control module controls the sending module to broadcast and send SIB in the Other SI which is indicated to be sent by the broadcast indication information in the Other SI corresponding to each scanning block according to the beam scanning configuration information, the broadcast indication information and the scheduling information.

The beam scanning configuration information is used for configuring a scanning block and a scanning array, wherein the beam scanning configuration information at least comprises:

the number of scanning blocks and/or the identification information of the scanning blocks are included in one scanning array; and-or alternatively, the first and second heat exchangers may be,

Example 6

The embodiment of the invention also relates to a receiving device of the system message and a terminal comprising the device, wherein the receiving device comprises:

a receiver for receiving a master system information block MIB through a first broadcast channel;

a controller acquiring broadcasting indication information of a system information fast SIB broadcasted in a third broadcasting channel from the MIB; and controlling the receiver to receive the corresponding SIB in the third broadcast channel according to the broadcast indication information.

Wherein the receiver also receives the remaining Minimum SI through a second broadcast channel before the third broadcast channel receives the corresponding SIB;

the controller acquires the scheduling information of the SIB broadcasted in the third broadcast channel from the residual Minimum SI, and controls the receiver to receive the corresponding SIB in the third broadcast channel according to the broadcasting indication information and the scheduling information.

The controller acquires scheduling information index information from the MIB, and further determines configuration information adopted by a cell for transmitting the SIB from the scheduling information.

In addition, the receiver receives the MIB and the SIB in the Other SI in a beam scanning manner, where the beam scanning configuration information of the Other SI is determined according to the beam scanning configuration information of the MIB.

And the controller controls the receiver to receive SIB in Other SI in one or more corresponding scanning blocks according to the beam scanning configuration information, the scheduling information and the broadcasting indication information in the MIB received by one or more scanning blocks.

Example 7

The embodiment of the invention also relates to a program for realizing the transmission of the system message and a storage medium for storing the program, wherein the program is used for realizing the following steps:

dividing the system information into a Minimum system information block MIB and Other system information block Other than the Minimum system information block MIB, wherein the Minimum system information block MIB is further divided into a main system information block MIB and a residual Minimum system information block SI; the minimum system message is a system message which needs to be transmitted in a periodical broadcasting mode;

the MIB is transmitted through a first broadcast channel; the MIB includes broadcast indication information of which system information blocks SIBs in the Other SI need to be broadcast in a third broadcast channel;

The residual Minimum SI is transmitted through a second broadcast channel; the residual Minimum SI comprises scheduling information of SIB in the Other SI broadcasted in the third broadcast channel;

and broadcasting corresponding SIB in the Other SI in the third broadcast channel according to the broadcast indication information and the scheduling information.

Wherein, the scheduling information comprises one or more configuration information for transmitting SIB.

When the scheduling information includes a plurality of configuration information, the MIB also includes scheduling information index information indicating one type of configuration information adopted in the plurality of configuration information.

The first, second and third broadcast channels are physical channels with different time domains, frequency domains and/or code domains.

Wherein, the Other SI adopts a special signaling, broadcasting or multicasting mode for transmission.

In addition, the MIB and the SIB in the Other SI may be sent in a beam scanning manner, where a preset association relationship exists between beam scanning configuration information of the MIB and beam scanning configuration information of the Other SI.

According to the association relation between the beam scanning configuration information of the MIB and the beam scanning configuration information of the Other SI, different or same broadcast indication information is sent in the MIB of each scanning block;

And according to the beam scanning configuration information, the broadcast indication information and the scheduling information, broadcasting and transmitting SIBs in the Other SI, which are indicated to be transmitted by the broadcast indication information, in the Other SI corresponding to each scanning block.

The storage medium is mainly for storing the above-described program, and therefore, the present embodiment does not describe the program in the storage medium in detail; the storage medium may be a storage medium such as a hard disk, a removable hard disk, or an optical disk, as long as the storage medium can store the program.

In addition, a beam scanning mode is adopted to send SIBs in the MIB and the Other SI. The MIB comprises beam scanning configuration information which is used for representing broadcast indication information corresponding to each scanning block; and according to the beam scanning configuration information, the broadcasting indication information and the scheduling information, when the SIB in the Other SI is transmitted through beam scanning, only the SIB corresponding to the scanning block is broadcasted and transmitted in each scanning block.

Example 8

The embodiment of the invention also relates to a program for receiving the system message and a storage medium for storing the program, wherein the program is used for realizing the following steps:

receiving a main system information block (MIB) through a first broadcast channel, and acquiring broadcast indication information of a system information fast SIB broadcasted in a third broadcast channel from the MIB;

Wherein, before the third broadcast channel receives the corresponding SIB, the residual Minimum SI is received through the second broadcast channel; and acquiring scheduling information of SIB (information block) broadcasted in the third broadcast channel from the residual Minimum SI, and receiving corresponding SIB in the third broadcast channel according to the broadcasting indication information and the scheduling information.

And acquiring scheduling information index information from the MIB, and further determining configuration information adopted by a cell for transmitting the SIB from the scheduling information.

Wherein the program further comprises:

and receiving the SIB in the MIB and the Other SI in a beam scanning mode, wherein the beam scanning configuration information of the Other SI is determined according to the beam scanning configuration information of the MIB.

And receiving SIB in Other SI at one or more corresponding scanning blocks according to the beam scanning configuration information, the scheduling information and the broadcasting indication information in the MIB received by one or more scanning blocks.

It should be noted that, the method for transmitting and receiving a system message disclosed in the foregoing embodiment may be implemented by installing a program instruction corresponding to implementing the foregoing method on a corresponding device, or by adding a storage medium containing a program to a corresponding device, so as to obtain a corresponding terminal device. The terminal may be a mobile terminal (a device with a processing function such as a mobile phone or a tablet computer), or may be a base station, a computer terminal or a similar device. The present embodiment is described taking as an example the system message received by running on a mobile terminal, which may comprise one or more (only one is shown in the figure) processors (which may include but are not limited to processing means such as a microprocessor MCU or a programmable logic device FPGA), a memory for storing data, and a data transceiver for communication functions. Those skilled in the art will appreciate that by splitting or combining the functions described above, additional or fewer components may be included, and that this embodiment is not illustrated.

The memory may be used to store software programs and modules of the application software, and program instructions/modules corresponding to the method of receiving system messages in the foregoing embodiments may be stored in the memory, and specific methods have been described in detail in the foregoing embodiments, so that the detailed descriptions of the embodiments are omitted.

The processor executes various functional applications and data processing, i.e., implements the methods described above, by running software programs and modules stored in the memory. The memory may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, the memory may further include memory (cloud memory) remotely located with respect to the processor, which may be connected to the mobile terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The data transceiver is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission means comprises a network adapter (Network Interface Controller, simply referred to as NIC) that can be connected to other network devices via a base station to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used to communicate with the internet wirelessly.

Correspondingly, the system equipment at the base station side can also be realized by the above structure, and the difference is that the program instruction stored in the memory is a transmission program of the system message, so that the embodiment is not repeated.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and accordingly the scope of the invention is not limited to the embodiments described above.

Claims

1. A method for transmitting system messages, characterized in that the system messages are divided into a first system message and a second system message, wherein the first system message is further divided into a third system message and a fourth system message; the first system message comprises Minimum system information (MIB) which refers to system information related to cell selection and initial access, the second system message comprises Other system information (OtherS) which refers to all system information except the Minimum system information, the third system message is a Master Information Block (MIB) in the Minimum SI, and the fourth system message is the rest of the Minimum SI except the Master Information Block (MIB) in the Minimum SI; the MIB is an independent system information block, and comprises broadcasting indication information of the Other SI; the method comprises the following steps:

2. The method of transmitting system messages according to claim 1, wherein said scheduling information includes one or more configuration information for transmitting SIBs in the second system message.

3. The transmission method of system messages according to claim 2, wherein when a plurality of configuration information is included in said scheduling information, scheduling information index information indicating one configuration information employed in said plurality of configuration information is further included in said third system message.

4. The method for transmitting system messages according to claim 1, wherein a beam scanning mode is adopted to transmit SIBs in the third system message and the second system message, and wherein a preset association relationship exists between beam scanning configuration information of the third system message and beam scanning configuration information of the second system message.

5. The transmission method of system messages according to claim 4, wherein different or the same broadcast indication information is transmitted in a scanning block of each of said third system messages according to an association relationship between beam scanning configuration information of said third system message and beam scanning configuration information of said second system message;

6. The method for transmitting a system message according to claim 4 or 5, wherein the beam scanning configuration information is used for configuring a scanning block and a scanning array, and wherein the beam scanning configuration information at least includes:

7. A method for receiving a system message, wherein the system message is divided into a first system message and a second system message, and wherein the first system message is further divided into a third system message and a fourth system message; the first system message comprises Minimum system information (MIB) which refers to system information related to cell selection and initial access, the second system message comprises Other system information (OtherS) which refers to all system information except the Minimum system information, the third system message is a Master Information Block (MIB) in the Minimum SI, and the fourth system message is the rest of the Minimum SI except the Master Information Block (MIB) in the Minimum SI; the Minimum SI comprises a MIB and the rest Minimum SI, the Minimum SI comprises scheduling information of Other SI, the MIB is an independent system information block, the MIB comprises broadcasting indication information of the Other SI, and the method comprises the following steps:

Receiving a third system message through a first broadcast channel, and acquiring broadcast indication information of a System Information Block (SIB) broadcasted in the third broadcast channel from the third system message; the third system message is a master information block MIB in a Minimum SI;

8. The method of receiving a system message according to claim 7, wherein a fourth system message is received through a second broadcast channel before the third broadcast channel receives the corresponding SIB; and acquiring scheduling information of SIB (information block) broadcasted in the third broadcast channel from the fourth system message, and receiving corresponding SIB in the third broadcast channel according to the broadcasting indication information and the scheduling information.

9. The method of receiving a system message according to claim 8, wherein scheduling information index information is obtained from the third system message, and further configuration information employed by a cell to transmit the SIB is determined from the scheduling information.

10. The method for receiving a system message according to claim 7 or 9, wherein SIBs in the third system message and the second system message are received by adopting a beam scanning manner, wherein beam scanning configuration information of the second system message is determined according to beam scanning configuration information of the third system message.

11. The method of receiving system messages according to claim 10, wherein SIBs in a second system message are received at one or more scan blocks of the corresponding second system message based on the beam scan configuration information, scheduling information, and the broadcast indication information received at one or more scan blocks of a third system message.

12. A system message transmission apparatus, comprising:

the control module is used for dividing the system message into a first system message and a second system message in advance, wherein the first system message is further divided into a third system message and a fourth system message; the first system message comprises Minimum system information (MIB) which refers to system information related to cell selection and initial access, the second system message comprises Other system information (OtherS) which refers to all system information except the Minimum system information, the third system message is a Master Information Block (MIB) in the Minimum SI, and the fourth system message is the rest of the Minimum SI except the Master Information Block (MIB) in the Minimum SI; the third system message comprises broadcast indication information of a system information block SIB in the second system message broadcast in a third broadcast channel; the fourth system message comprises scheduling information of SIB in the second system message broadcasted in the third broadcast channel; the control instruction is used for sending out corresponding SIB in the second system information broadcast by the third broadcast channel according to the broadcast indication information and the scheduling information; the MIB is an independent system information block, and comprises broadcasting indication information of the Other SI;

13. The system message transmission apparatus of claim 12, wherein the scheduling information includes one or more configuration information for transmitting SIBs in the second system message.

14. The transmission apparatus of system messages according to claim 13, wherein when a plurality of configuration information are included in the schedule information, the control module is further provided with schedule information index information indicating one type of configuration information employed among the plurality of configuration information in the third system message.

15. The system message transmission apparatus of claim 12, wherein the transmitting module transmits the SIB in the third system message and the second system message in a beam scanning manner, and wherein a preset association relationship exists between beam scanning configuration information of the third system message and beam scanning configuration information of the second system message.

16. The system message transmission apparatus according to claim 15, wherein the control module controls the transmission module to transmit the different or same broadcast indication information in the third system message of each scan block according to an association relationship between beam scanning configuration information of the third system message and beam scanning configuration information of the second system message;

17. The system message transmission apparatus according to claim 15 or 16, wherein the beam scanning configuration information is used to configure a scanning block and a scanning array, wherein the beam scanning configuration information includes at least:

18. A system message receiving apparatus, comprising:

A receiver for dividing a system message into a first system message and a second system message, wherein the first system message is further divided into a third system message and a fourth system message; the first system message comprises Minimum system information (MIB) which refers to system information related to cell selection and initial access, the second system message comprises Other system information (OtherS) which refers to all system information except the Minimum system information, the third system message is a Master Information Block (MIB) in the Minimum SI, and the fourth system message is the rest of the Minimum SI except the Master Information Block (MIB) in the Minimum SI; the MIB is an independent system information block, and comprises broadcasting indication information of the Other SI; receiving a third system message through a first broadcast channel; the third system message is a master information block MIB in a Minimum SI;

a controller for acquiring broadcast indication information of a system information block SIB broadcasted in a third broadcast channel from the third system message; and controlling the receiver to receive the corresponding SIB in the third broadcast channel according to the broadcast indication information.

19. The system message receiving apparatus of claim 18, wherein the receiver further receives a fourth system message over a second broadcast channel before the third broadcast channel receives the corresponding SIB;

20. The apparatus of claim 19, wherein the controller obtains scheduling information index information from the third system message, and further determines configuration information employed by a cell to transmit the SIB from the scheduling information.

21. The apparatus for receiving a system message according to claim 18 or 20, wherein the receiver receives SIBs in the third system message and the second system message in a beam scanning manner, and wherein the beam scanning configuration information of the second system message is determined according to the beam scanning configuration information of the third system message.

22. The system message receiving apparatus of claim 21, wherein the controller controls the receiver to receive SIBs in a second system message at the corresponding one or more scan blocks according to the beam scan configuration information, scheduling information, and the broadcast indication information in a third system message received at the one or more scan blocks.

23. A terminal that receives a system message via a system message receiving means, wherein the receiving means comprises:

24. The terminal of claim 23, wherein the receiver is further to receive a fourth system message over a second broadcast channel before the third broadcast channel receives the corresponding SIB;

25. The terminal of claim 24, wherein the controller obtains scheduling information index information from the third system message, and further determines configuration information employed by a cell to transmit the SIB from the scheduling information.

26. The terminal of claim 23 or 25, wherein the receiver receives SIBs in the third system message and the second system message in a beam scanning manner, and wherein the beam scanning configuration information of the second system message is determined according to the beam scanning configuration information of the third system message.

27. The terminal of claim 26, wherein the controller controls the receiver to receive SIBs in a second system message at a corresponding one or more scan blocks according to the beam scan configuration information, scheduling information, and the broadcast indication information in a third system message received at the one or more scan blocks.