CN104349484B - A kind of sending method of system information, method of reseptance and device - Google Patents

Abstract

The invention discloses a kind of sending method of system information, method of reseptance and device.Its method includes：Base station sends specific SIB schedule information within specific SIB each repetition period；In specific SIB each repetition period, repeat to send specific SIB in specific SIB scheduling occasion.Terminal receives specific SIB schedule information within specific SIB each repetition period；After the schedule information for obtaining the specific SIB, in specific SIB each repetition period, repeat to receive downstream signal in the scheduling occasion of the specific SIB, to obtain the specific SIB according to the downstream signal received.Because network side repeats to send specific SIB within a repetition period, the number repeated within a SIB modification cycle at least doubles than prior art, so as to meet the demodulation demand of terminal, improves systematic function.

Description

System information sending method, system information receiving method and system information sending device, system information receiving device and system information receiving device

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for sending and receiving system information.

Background

Machine-to-Machine (M2M) communication is a novel communication concept, and aims to organically combine various different types of communication technologies (such as Machine-to-Machine communication, Machine control communication, man-Machine interaction communication and mobile internet communication), so as to promote the development of social production and the improvement of life style.

Some of the characteristics that may exist with currently recognized Machine Type Communications (MTC) Communications are:

MTC terminals (also called MTC devices) have low mobility;

the time for the MTC terminal to perform data transmission with the network side is controllable; namely, the MTC terminal can only access within a time period specified by the network;

the data transmission between the MTC terminal and the network side has low real-time requirement, namely: the method is time-tolerant;

the MTC terminal is limited in energy and requires extremely low power consumption;

only small data volume information transmission is carried out between the MTC terminal and the network side;

the MTC terminals may be managed in units of groups;

……

an actual MTC terminal may have one or more of the characteristics described above.

With the Evolution of wireless communication technology, MTC functions need to be supported in a Long Term Evolution (LTE) system.

When the MTC terminal is deployed in a basement, a mall, a corner of a building, or the like, a wireless signal is severely blocked, which results in a large attenuation. The MTC terminal needs to combine downlink signals many times to correctly demodulate system information. However, according to the scheduling mechanism of the existing LTE system, for some system information blocks (hereinafter referred to as specific SIBs) required by such MTC terminals for communication, the number of repetitions within one SIB modification period is not sufficient to support the demodulation requirement of the specific MTC terminals. Taking SIB2 as an example, assuming that the SIB2 has a repetition period of 320ms and the SIB modification period is 2560ms, the SIB2 may be repeated only 8 times according to the existing mechanism. For a scene in which the wireless signal is severely blocked, the MTC terminal does not combine the received downlink signal for 8 times enough to correctly demodulate SIB 2.

Disclosure of Invention

The invention aims to provide a system information sending method, a system information receiving method and a system information sending device, and aims to solve the problem that an MTC terminal cannot acquire system information correctly when a wireless signal is shielded seriously.

The purpose of the invention is realized by the following technical scheme:

a method for transmitting system information, wherein in each repetition period of a specific SIB, the method comprises:

repeatedly transmitting the scheduling information of the specific SIB;

repeatedly transmitting the specific SIB at a scheduling timing of the specific SIB. The specific SIBs are SIBs required for the terminal to communicate.

Because the network side repeatedly sends the specific SIB in a repetition period, the number of times of repetition in an SIB modification period is at least doubled compared with the prior art, thereby meeting the demodulation requirements of the terminal and improving the system performance.

In this embodiment of the present invention, the length of the repetition period of the specific SIB may be the minimum repetition period notified in the SIB1, may also be the maximum repetition period notified in the SIB1, and may also be another repetition period length (for example, may be the repetition period configured for the specific SIB in the prior art) determined by protocol convention or by the network side.

It should be noted that certain SIBs need to be transmitted while avoiding the subframes in which SIB1 and the multicast/multicast single frequency network (MBSFN) transmissions are located. In case of a Time Division Duplex (TDD) system, it is also necessary to avoid uplink subframes and special subframes.

The specific SIB is repeatedly transmitted at the scheduling timing of the specific SIB based on a scheduling timing, which may be implemented by: the specific SIB is repeatedly transmitted in M consecutive radio frames of a repetition period of the specific SIB.

Preferably, the specific SIB is repeatedly transmitted in M consecutive radio frames of the repetition period of the specific SIB, and the implementation manner may be: the specific SIB is transmitted over all or part of subframes of consecutive M radio frames of a repetition period of the specific SIB.

Based on any implementation manner of the scheduling opportunity, preferably, the starting radio frame of the continuous M radio frames is adjacent to the last radio frame of the scheduled other SIB in the repetition period of the specific SIB; or, the consecutive M radio frames are the last M radio frames of the repetition period.

Repeatedly transmitting the specific SIB at the scheduling timing of the specific SIB based on another scheduling timing, which can be implemented by: selecting a transmission opportunity pattern from pre-agreed transmission opportunity patterns for transmitting the specific SIB, the transmission opportunity pattern for transmitting the specific SIB specifying a relative position of a radio frame in which the specific SIB is transmitted in a repetition period of the specific SIB, or the transmission opportunity pattern for transmitting the specific SIB specifying a number of a subframe in which the specific SIB is transmitted in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB; repeatedly transmitting the specific SIBs according to the selected transmission timing pattern. Correspondingly, in each repetition period of a specific SIB, the method provided in the embodiment of the present invention further includes: and carrying the selection result of the transmission opportunity pattern in an SIB1 and transmitting the selection result to the terminal.

Based on the foregoing embodiment of any transmission method, preferably, the scheduling information of the specific SIB is repeatedly transmitted, and the implementation manner may be: and sending a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on the subframe for sending the specific SIB, wherein DCI carried by each PDCCH is the same.

A method for receiving system information, in each repetition period of a specific SIB, the method comprising:

repeatedly receiving the scheduling information of the specific SIB, wherein the specific SIB is the SIB required by the terminal for communication;

after the scheduling information of the specific SIB is acquired, the downlink signal is repeatedly received at the scheduling time of the specific SIB, so as to acquire the specific SIB according to the received downlink signal, within the modification period of the specific SIB.

Because the terminal can repeatedly receive the downlink signal at the scheduling opportunity of the specific SIB in a repetition period, if the repetition times are enough, the downlink signal received in the repetition period can be combined so as to correctly demodulate the specific SIB. Even if the specific SIB cannot be correctly demodulated in one repetition period, the number of repetitions in one SIB modification period is at least doubled compared to the prior art because the specific SIB is repeatedly transmitted in the repetition period, thereby satisfying the demodulation requirements of the terminal and improving the system performance.

Based on a scheduling timing, repeatedly receiving the downlink signal at the scheduling timing of the specific SIB, which may be implemented by: and repeatedly receiving the downlink signal in M continuous radio frames of the repetition period of the specific SIB.

Preferably, the downlink signal is repeatedly received in M consecutive radio frames of the repetition period of the specific SIB, which may be implemented by: and receiving the downlink signal on all or part of subframes of continuous M radio frames of a repetition period of a specific SIB.

Based on any implementation mode of the scheduling opportunity, starting radio frames of continuous M radio frames are adjacent to the last radio frame of scheduling other SIBs in the repetition period of a specific SIB; or, the consecutive M radio frames are the last M radio frames of the repetition period.

Based on another scheduling occasion, in each repetition period of a specific SIB, the receiving method provided in the embodiment of the present invention may further include: the selection result of the transmission timing pattern to transmit the specific SIB, which specifies the relative position of the radio frame in which the specific SIB is transmitted in the repetition period of the specific SIB, is acquired from the received SIB1, or the transmission timing pattern to transmit the specific SIB specifies the number of the subframe in which the specific SIB is transmitted in the radio frame and the relative position of the radio frame in the repetition period of the specific SIB. Correspondingly, the downlink signal is repeatedly received at the scheduling timing of the specific SIB, and the implementation manner may be: determining a transmission opportunity pattern indicated by the selection result from a transmission opportunity pattern for transmitting the specific SIB agreed in advance; and repeatedly receiving the downlink signal according to the determined transmission timing pattern.

Based on the above-mentioned embodiment of any receiving method, preferably, the scheduling information of the specific SIB is repeatedly received, and the implementation manner may be: and receiving a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe for receiving the downlink signal, wherein DCI carried by each PDCCH is the same.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a base station, including:

a scheduling information sending module, configured to repeatedly send scheduling information of a specific SIB in each repetition period of the specific SIB;

an SIB sending module, configured to repeatedly send a specific SIB at a scheduling occasion of the specific SIB in each repetition period of the specific SIB, where the specific SIB is an SIB required for a terminal to communicate.

Because the network side repeatedly sends the specific SIB in a repetition period, the number of times of repetition in an SIB modification period is at least doubled compared with the prior art, thereby meeting the demodulation requirements of the terminal and improving the system performance.

Based on a scheduling occasion, the SIB transmitting module may be specifically configured to:

repeatedly transmitting a specific SIB in M consecutive radio frames per repetition period of the specific SIB.

Preferably, the SIB sending module is specifically configured to:

transmitting a specific SIB over all or part of subframes of consecutive M radio frames per repetition period of the specific SIB.

Based on any implementation manner of the scheduling opportunity, the starting radio frame of the continuous M radio frames is adjacent to the last radio frame of other SIBs scheduled in each repetition period of the specific SIB; or,

the continuous M wireless frames are the last M wireless frames of the repetition period.

Based on another implementation, the SIB sending module may be specifically configured to:

selecting a transmission opportunity pattern from pre-agreed transmission opportunity patterns for transmitting the specific SIB, the transmission opportunity pattern for transmitting the specific SIB specifying a relative position of a radio frame in which the specific SIB is transmitted in a repetition period of the specific SIB, or the transmission opportunity pattern for transmitting the specific SIB specifying a number of a subframe in which the specific SIB is transmitted in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB;

repeatedly transmitting a specific SIB according to a selected transmission timing pattern in each repetition period of the specific SIB;

and in each repetition period of a specific SIB, carrying a selection result of the transmission opportunity pattern in the SIB1 and transmitting the selection result to the terminal.

Based on any of the foregoing embodiments of the base station, preferably, the scheduling information sending module is specifically configured to:

and in each repetition period of the specific SIB, sending a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe sending the specific SIB, wherein DCI carried by each PDCCH is the same.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a terminal, including:

a scheduling information receiving module, configured to repeatedly receive scheduling information of a specific SIB in each repetition period of the specific SIB, where the specific SIB is an SIB required for a terminal to communicate;

an SIB receiving module, configured to repeatedly receive, in each repetition period of a specific SIB, a downlink signal at a scheduling timing of the specific SIB after the scheduling information of the specific SIB is acquired, so as to acquire the specific SIB according to the received downlink signal.

Because the terminal can repeatedly receive the downlink signal at the scheduling opportunity of the specific SIB in a repetition period, if the repetition times are enough, the downlink signal received in the repetition period can be combined so as to correctly demodulate the specific SIB. Even if the specific SIB cannot be correctly demodulated in one repetition period, the number of repetitions in one SIB modification period is at least doubled compared to the prior art because the specific SIB is repeatedly transmitted in the repetition period, thereby satisfying the demodulation requirements of the terminal and improving the system performance.

Based on a scheduling occasion, the SIB receiving module may be specifically configured to:

and repeatedly receiving the downlink signal in M continuous radio frames of each repetition period of the specific SIB.

Preferably, the SIB receiving module is specifically configured to:

and receiving the downlink signal on all or part of subframes of continuous M radio frames of each repetition period of a specific SIB.

Based on any embodiment of the scheduling occasion, the starting radio frame of the M consecutive radio frames is adjacent to the last radio frame in each repetition period of the specific SIB, where other SIBs are scheduled; or, the consecutive M radio frames are the last M radio frames of the repetition period.

Based on another scheduling occasion, the SIB receiving module may be specifically configured to:

acquiring, from the received SIB1, a selection result of a transmission timing pattern for transmitting a specific SIB specifying a relative position of a radio frame in which the specific SIB is transmitted in a repetition period of the specific SIB, or specifying a number of a subframe in which the specific SIB is transmitted in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB, in each repetition period of the specific SIB;

determining a transmission opportunity pattern indicated by the selection result from a transmission opportunity pattern for transmitting the specific SIB agreed in advance;

and repeatedly receiving the downlink signal according to the determined transmission timing pattern in each repetition period of the specific SIB.

Based on any of the terminal-side embodiments described above, preferably, the scheduling information receiving module is specifically configured to:

and in each repetition period of the specific SIB, receiving a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe for receiving the downlink signal, wherein DCI carried by each PDCCH is the same.

Based on the same inventive concept as the method, an embodiment of the present invention further provides another base station, including:

the processor is configured to transmit scheduling information of a specific SIB through the radio frequency unit in each repetition period of the specific SIB, and repeatedly transmit the specific SIB at a scheduling timing of the specific SIB through the radio frequency unit, wherein the specific SIB is a SIB required by a terminal to communicate.

Because the network side repeatedly sends the specific SIB in a repetition period, the number of times of repetition in an SIB modification period is at least doubled compared with the prior art, thereby meeting the demodulation requirements of the terminal and improving the system performance.

The specific implementation manner of the embodiment of the base station may refer to the description of the embodiment of the base station, and is not described herein again.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a terminal, including:

the processor is configured to receive scheduling information of a specific SIB through the radio frequency unit in each repetition period of the specific SIB, wherein the specific SIB is a SIB required by a terminal for communication; after the scheduling information of the specific SIB is acquired, repeatedly receiving downlink signals at the scheduling time of the specific SIB through a radio frequency unit in each repetition period of the specific SIB, so as to acquire the specific SIB according to the received downlink signals.

Because the terminal can repeatedly receive the downlink signal at the scheduling opportunity of the specific SIB in a repetition period, if the repetition times are enough, the downlink signal received in the repetition period can be combined so as to correctly demodulate the specific SIB. Even if the specific SIB cannot be correctly demodulated in one repetition period, the number of repetitions in one SIB modification period is at least doubled compared to the prior art because the specific SIB is repeatedly transmitted in the repetition period, thereby satisfying the demodulation requirements of the terminal and improving the system performance.

The specific implementation manner of the terminal embodiment may refer to the description of the terminal embodiment, and repeated descriptions are omitted.

Drawings

Fig. 1 is a flowchart of a transmitting method according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a first scheduling opportunity according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a second scheduling timing according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a third scheduling occasion according to an embodiment of the present invention;

fig. 5 is a flowchart of a receiving method according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a base station according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a terminal according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a scheme for transmitting and receiving system information aiming at a scene in which a wireless signal is seriously shielded, so that a terminal can correctly acquire the information. The core of the scheme provided by the embodiment of the invention is that a network side in each repetition period of a specific SIB: repeatedly scheduling the specific SIB and repeatedly transmitting the specific SIB at the scheduling occasion of the specific SIB; the terminal, in each repetition period of a particular SIB: and repeatedly receiving the scheduling information of the specific SIB, and repeatedly receiving the downlink signal at the scheduling time of the specific SIB after acquiring the scheduling information.

In existing LTE systems, a SIB (e.g., SIB 2) is transmitted only once within one repetition period of the SIB (non-SIB 1). When the wireless signal is severely shielded, the terminal needs to combine the downlink signals received in multiple repetition periods to demodulate and acquire the system information. It is clear that the number of repetitions within one SIB modification period is not sufficient to support the demodulation requirements at the terminal. According to the technical scheme provided by the embodiment of the invention, the network side repeatedly sends the specific SIB in a repetition period of the specific SIB; correspondingly, the terminal can repeatedly receive the downlink signal at the scheduling opportunity of the specific SIB in one repetition period of the specific SIB, and if the repetition times are sufficient, the downlink signal received in one repetition period can be combined so as to correctly demodulate the specific SIB. Even if the specific SIB cannot be correctly demodulated in one repetition period, the number of repetitions in one SIB modification period is at least doubled compared to the prior art because the specific SIB is repeatedly transmitted in the repetition period, thereby satisfying the demodulation requirements of the terminal and improving the system performance.

Before describing the technical solutions provided by the embodiments of the present invention in detail, the technical terms related to the embodiments of the present invention are explained first:

repetition period of SIB: in the conventional implementation, the repetition period of the SIB of another type other than SIB1 is referred to as the transmission period of the SIB. Assuming that the repetition period of SIB2 is 320ms, SIB2 is transmitted every 320ms, according to existing implementations. In the embodiment of the present invention, the specific SIB is repeatedly transmitted in the repetition period of the specific SIB.

Time window of SI message (SI-windows): in addition to SIB1, other types of SIBs need to be mapped into SI messages for transmission. Each SI message is associated with a time window, the time windows of different SI messages do not overlap, the length of the time window of each SI message is the same and can be configured through SIB 1. The SI message is transmitted in a dynamically scheduled manner within its time window. Then, the radio frame in which the specific SIB is repeatedly transmitted constitutes a time window of the SI message within the repetition period of the specific SIB.

Modification period of SIB: the change of the SIB occurs at a specific radio frame. It is assumed that the network side sends a change notification of the SIB to the terminal in the modification period L, but still sends/receives the current SIB in the modification period L, and sends/receives the changed SIB when the next modification period L +1 arrives.

Specific SIB: refers to SIBs required for the terminal to communicate. The SIBs required by the terminal are different for different communication procedures or phases, and the specific SIBs are different. Specifically, which type of SIB is used as the specific SIB needs to be determined according to a specific communication scenario, and the present invention is not limited thereto. For example, in the terminal access process, access needs to be completed according to the cell radio configuration information and other base station configuration information carried by SIB2, and then SIB2 is the specific SIB.

A terminal: the terminal described in the embodiment of the present invention may be an MTC terminal, and certainly, may also be a User Equipment (UE). But is particularly suitable for the MTC terminal, especially the MTC terminal with serious signal occlusion.

A base station: the base station described in the embodiment of the present invention may be an evolved node b (eNB) in an LTE system, or may be a base station in a communication system of a higher evolution version based on the LTE system.

The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows a method for sending system information according to an embodiment of the present invention, where in each repetition period of a specific SIB, the method according to the embodiment of the present invention specifically includes the following operations:

step 100, repeatedly transmitting the scheduling information of the specific SIB.

And sending the scheduling information of the specific SIB, namely scheduling the SI message with the SIB having the mapping relation.

Step 110, repeatedly transmitting the specific SIB at the scheduling timing of the specific SIB.

Wherein, in the modification period of the specific SIB, the relative position of the subframe in which the specific SIB is transmitted in each repetition period is the same in the repetition period.

In the embodiment of the present invention, the length of the repetition period of the specific SIB may be the minimum repetition period notified in the SIB 1. The length of the repetition period of a particular SIB may also be the maximum repetition period signaled in SIB 1. The length of the repetition period of the specific SIB may also be a protocol convention or other repetition period lengths determined by the network side, and taking the specific SIB is SIB2 as an example, the length of the repetition period may be 320ms along the currently commonly used configuration length.

It should be noted that certain SIBs need to be transmitted while avoiding the subframes in which SIB1 and the multicast/multicast single frequency network (MBSFN) transmissions are located. In case of a Time Division Duplex (TDD) system, it is also necessary to avoid uplink subframes and special subframes.

Based on the foregoing transmission method embodiment, the scheduling timing of the specific SIB may be M consecutive radio frames in a repetition period of the specific SIB predetermined by a protocol or determined by a network side, or may be a timing for transmitting the specific SIB specified in a transmission timing pattern (pattern) for transmitting the specific SIB predetermined by the protocol (that is, specifying a relative position of a radio frame for transmitting the specific SIB in the repetition period of the specific SIB, or specifying a number of a subframe for transmitting the specific SIB in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB).

And if the specific SIB is in continuous M wireless frames of the repetition period of the specific SIB, repeatedly transmitting the specific SIB. The consecutive M radio frames are a time window of SI messages mapped with the specific SIM. The length (M) of the time window may be predetermined in the protocol, or may be determined by the network side and signaled to the terminal through SIB 1. In addition, the position of the time window in the repetition period may be predetermined in the protocol, or may be determined by the network side and informed to the terminal through SIB 1.

The specific SIB may be transmitted in each subframe of the consecutive M radio frames. The specific SIB may also be sent on a part of subframes of the consecutive M radio frames according to a protocol convention or a decision of the network side. For the case of transmitting the specific SIB in the partial subframes, in particular, the subframes used for transmitting the specific SIB in each radio frame are the same in the consecutive M radio frames. If the network side decides which subframes are used for transmitting specific SIBs, the network side also needs to inform the terminal of the number of these subframes through the SIB 1. Regardless of whether the specific SIB is transmitted on all or part of the subframes, the subframe in which the specific SIB is transmitted is not the subframe in which SIB1 and MBSFN transmission are located, and for a TDD system, is not the uplink subframe and special subframe.

As shown in fig. 2, one implementation manner of consecutive M radio frames in the repetition period of the specific SIB may be: the starting radio frame of the consecutive M radio frames is adjacent to the last radio frame in the repetition period of the particular SIB in which other SIBs are scheduled.

As shown in fig. 3, another implementation of consecutive M radio frames in the repetition period of a specific SIB may be: the consecutive M radio frames may be the last M radio frames of a repetition period of a particular SIB.

It should be noted that in the prior art, the SIB is transmitted only once within one time window of the SI message to which it is mapped. In the embodiment of the present invention, the specific SIB is repeatedly transmitted within the time window of the SI message with which the mapping relationship exists.

If the specific SIB is transmitted at the timing defined in the transmission timing pattern, the specific SIB is repeatedly transmitted in the repetition period of the specific SIB. Specifically, one transmission opportunity pattern is selected from the transmission opportunity patterns for transmitting the specific SIB which are pre-agreed (i.e., agreed by the protocol) (as shown in fig. 4); and repeatedly transmitting the specific SIB according to the selected transmission timing pattern.

The specific implementation manner of selecting the transmission timing pattern is determined according to the actual communication requirement, for example, the timing for transmitting the specific SIB, which is specified by the selected transmission timing pattern, needs to avoid the subframe for transmitting the SIB1 and the subframe for transmitting the MBSFN. For TDD systems, uplink subframes and special subframes also need to be avoided.

Further, in each repetition period of the specific SIB, the selection result of the transmission timing pattern is also carried in the SIB1 and is transmitted to the terminal. The selection result may be the specific content of the selected transmission timing pattern, or may be the identifier or number of the selected transmission timing pattern.

Since the SI message is scheduled for transmission by a Physical Downlink Control Channel (PDCCH). Thus, for each particular SIB, a corresponding PDCCH is also transmitted to schedule the particular SIB.

Based on any of the foregoing embodiments of the sending method, preferably, the specific implementation manner of step 100 may be: and sending a PDCCH for scheduling the specific SIB on the subframe for sending the specific SIB, wherein Downlink Control Information (DCI) carried by each PDCCH is the same. That is, the transmission timing of the PDCCH scheduling the specific SIB is the same as the scheduling timing of the specific SIB. Of course, the transmission timing of the PDCCH for scheduling the specific SIB may be earlier than the scheduling timing of the specific SIB.

Fig. 5 shows a method for receiving system information according to an embodiment of the present invention, where in each repetition period of a specific SIB, the method according to the embodiment of the present invention specifically includes the following operations:

step 500, the scheduling information of the specific SIB is repeatedly received.

For the length of the repetition period of the specific SIB, the length of the repetition period of the specific SIB sent by the network side is the same, which may specifically refer to the description of the above-mentioned embodiment of the sending method side, and is not described here again.

Step 510, after the scheduling information of the specific SIB is acquired, repeatedly receiving the downlink signal at the scheduling time of the specific SIB, so as to acquire the specific SIB according to the received downlink signal.

In the modification period of the specific SIB, the relative position of the subframe receiving the downlink signal in each repetition period in the repetition period is the same.

Based on the above receiving method embodiment, the scheduling timing of the specific SIB may be M consecutive radio frames in a repetition period predetermined by a protocol or determined by a network side, or may be a timing for transmitting the specific SIB specified in a transmission timing pattern (pattern) for transmitting the specific SIB predetermined by the protocol (i.e., specifying a relative position of a radio frame for transmitting the specific SIB in the repetition period of the specific SIB, or specifying a number of a subframe for transmitting the specific SIB in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB).

And if the specific SIB is in M continuous wireless frames of the repetition period, repeatedly receiving the downlink signal. The consecutive M radio frames are the time window of the SI message mapped with the specific SIM. The length (M) of the time window may be either pre-agreed in the protocol or known from the SIB 1. In addition, the position of the time window in the SI period may be predetermined in the protocol or may be known from SIB 1.

Wherein, if the network side sends the specific SIB in each subframe of the M consecutive radio frames. The terminal may receive the downlink signal on each subframe of the consecutive M radio frames. Of course, if the specific SIB is correctly demodulated by combining the downlink signals received from the previous subframes, it is not necessary to continue to receive the downlink signals corresponding to the specific SIB on the subsequent subframes of the M radio frames.

If the network side sends the specific SIB on partial subframes of continuous M wireless frames. The terminal may receive the downlink signal on a part of subframes of the consecutive M radio frames. Of course, if the specific SIB is correctly demodulated by combining the downlink signals received in the first subframes, the downlink signals corresponding to the specific SIB do not need to be continuously received in the subsequent subframes of the M radio frames.

For the case of receiving downlink signals on part of subframes, in particular, the subframes used for transmitting the specific SIB on each radio frame are the same in the consecutive M radio frames. If it is decided by the network side which subframes are used for transmission of a particular SIB, the terminal knows the number of these subframes in the SIB 1.

Regardless of whether downlink signals are received on all or part of subframes, the subframes in which downlink signals are received are not the subframes in which SIB1 and MBSFN transmission are located, and for a TDD system, are not uplink subframes and special subframes.

And receiving the downlink signal on all or part of subframes of continuous M radio frames of a repetition period of a specific SIB, wherein the subframe for receiving the downlink signal is not the subframe where the SIB1 and the multicast/multicast single frequency network MBSFN are transmitted, nor the uplink subframe and the special subframe.

The specific implementation manner of the continuous M wireless frames in the SI period is the same as that of the network side transmitting the specific SIB. Specifically, reference may be made to the description of the foregoing sending method embodiment, which is not described herein again.

If the specific SIB is transmitted at the timing defined in the transmission timing pattern, the downlink signal is repeatedly received in the repetition period of the specific SIB. Then, in each repetition period of the specific SIB, a selection result of a transmission timing pattern for transmitting the specific SIB is also acquired from the received SIB 1; determining a transmission opportunity pattern indicated by the selection result from a preset transmission opportunity pattern for transmitting the specific SIB; and repeatedly receiving the downlink signal according to the determined transmission timing pattern. For the description of the transmission timing pattern for transmitting the specific SIB, reference may be made to the above transmission method embodiment, which is not described herein again.

Since the SI message is transmitted by PDCCH scheduling. Thus, for each specific SIB, the scheduling information of the specific SIB is also acquired from the corresponding PDCCH. Based on any of the above embodiments of the receiving method, the specific implementation manner of step 500 may be: and receiving a PDCCH for scheduling a specific SIB on a subframe for receiving the downlink signal, wherein DCI carried by each PDCCH is the same. That is, the transmission timing of the PDCCH scheduling the specific SIB is the same as the scheduling timing of the specific SIB. Of course, the transmission timing of the PDCCH for scheduling the specific SIB may be earlier than the scheduling timing of the specific SIB.

The specific implementation of the specific SIB being transmitted by the network side and received by the terminal will be described by taking the scheduling timing shown in fig. 2 as an example.

The processing procedure of the network side can be described as follows:

in the repetition period of each specific SIB, the base station repeatedly transmits PDCCH for scheduling the specific SIB on the last M radio frames with System Frame Numbers (SFN) of N-M-N in the repetition period, and repeatedly transmits the specific SIB. It should be noted that SFN here is the relative position of the radio frame in the repetition period.

Specifically, in the M radio frames, the base station schedules the PDCCH of the specific SIB on the subframe where the SIB1 is transmitted and each subframe other than the subframe where the MBSFN is transmitted, and the DCI of the PDCCHs transmitted on these subframes is the same. And transmitting the specific SIB on the time-frequency resource scheduled by the PDCCH on the subframes.

The base station also carries the length of the repetition period of the particular SIB in SIB1 if it is determined by the base station.

If the value of M is determined by the base station, the base station also carries the value of M in the SIB 1.

The processing procedure of the terminal side can be described as follows:

in the repetition period of each specific SIB, the terminal repeatedly receives the PDCCH for scheduling the specific SIB and repeatedly receives the downlink signal corresponding to the specific SIB on the last M radio frames with the system frame number of N-M-N in the repetition period. It should be noted that SFN here is the relative position of the radio frame in the repetition period.

Specifically, in the M radio frames, the terminal receives the PDCCH for scheduling the specific SIB on the subframe in which the SIB1 is transmitted and each subframe other than the subframe in which the MBSFN is transmitted, and the DCI of the PDCCHs transmitted on these subframes is the same. And after the PDCCH is correctly demodulated by combining the received signals, the scheduling information of the specific SIB is obtained. Of course, if the PDCCH is correctly demodulated by combining signals received on a part of subframes, the PDCCH is not continuously received subsequently.

After acquiring the scheduling information of the specific SIB, the terminal receives downlink signals on the time-frequency resources indicated by the scheduling information of the specific SIB on the subframes. And correctly demodulating the specific SIB by combining the received downlink signals. Of course, if the specific SIB is correctly demodulated by combining the signals received on the partial subframes, the downlink signal does not continue to be received on the time-frequency resource indicated by the scheduling information.

If the PDCCH is correctly demodulated first, it will be the case that the terminal only needs to receive the downlink signal corresponding to the specific SIB on a certain subframe, and does not need to receive the PDCCH. Then, the terminal may receive the downlink signal on the time-frequency resource indicated by the scheduling information according to the scheduling information of the specific SIB carried in the PDCCH that is correctly demodulated before.

The terminal also acquires the length of the repetition period of the specific SIB in the SIB1 if the length of the repetition period of the specific SIB is determined by the base station.

If the value of M is determined by the base station, the terminal also acquires the value of M in the SIB 1.

The specific implementation of the specific SIB being transmitted by the network side and received by the terminal will be described by taking the scheduling timing shown in fig. 3 as an example.

The processing procedure of the network side can be described as follows:

in the repetition period of each specific SIB, the base station repeatedly transmits the PDCCH for scheduling the specific SIB on M radio frames with system frame numbers L + 1-L + M in the repetition period, and repeatedly transmits the specific SIB. And finishing scheduling other SIBs in the repetition period in the radio frame with the system frame number L. It should be noted that SFN here is the relative position of the radio frame in the repetition period.

Specifically, in the M radio frames, the base station schedules the PDCCH of the specific SIB on the subframe where the SIB1 is transmitted and each subframe other than the subframe where the MBSFN is transmitted, and the DCI of the PDCCHs transmitted on these subframes is the same. And transmitting the specific SIB on the time-frequency resource scheduled by the PDCCH on the subframes.

The base station also carries the length of the repetition period of the particular SIB in SIB1 if it is determined by the base station.

If the value of M is determined by the base station, the base station also carries the value of M in the SIB 1.

The processing procedure of the terminal side can be described as follows:

in the repetition period of each specific SIB, the terminal repeatedly receives the PDCCH for scheduling the specific SIB and repeatedly receives the downlink signal corresponding to the specific SIB on M radio frames with system frame numbers L + 1-L + M in the repetition period. It should be noted that SFN here is the relative position of the radio frame in the repetition period.

Specifically, in the M radio frames, the terminal receives the PDCCH for scheduling the specific SIB on the subframe in which the SIB1 is transmitted and each subframe other than the subframe in which the MBSFN is transmitted, and the DCI of the PDCCHs transmitted on these subframes is the same. And after the PDCCH is correctly demodulated by combining the received signals, the scheduling information of the specific SIB is obtained. Of course, if the PDCCH is correctly demodulated by combining signals received on a part of subframes, the PDCCH is not continuously received subsequently.

After acquiring the scheduling information of the specific SIB, the terminal receives downlink signals on the time-frequency resources indicated by the scheduling information of the specific SIB on the subframes. And correctly demodulating the specific SIB by combining the received downlink signals. Of course, if the specific SIB is correctly demodulated by combining the signals received on the partial subframes, the downlink signal does not continue to be received on the time-frequency resource indicated by the scheduling information.

If the PDCCH is correctly demodulated first, it will be the case that the terminal only needs to receive the downlink signal corresponding to the specific SIB on a certain subframe, and does not need to receive the PDCCH. Then, the terminal may receive the downlink signal on the time-frequency resource indicated by the scheduling information according to the scheduling information of the specific SIB carried in the PDCCH that is correctly demodulated before.

The terminal also acquires the length of the repetition period of the specific SIB in the SIB1 if the length of the SI period corresponding to the specific SIB is determined by the base station.

If the value of M is determined by the base station, the terminal also acquires the value of M in the SIB 1.

The specific implementation of the specific SIB being transmitted by the network side and received by the terminal will be described with reference to the scheduling timing shown in fig. 4 as an example.

For this implementation, the protocol may predetermine a plurality of transmission timings pattern for transmitting the specific SIB, where the transmission timings pattern specifies a relative position of a radio frame for transmitting the specific SIB in a repetition period of the specific SIB, or may specify a number of a subframe for transmitting the specific SIB in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB.

If the relative position of the radio frame for transmitting the specific SIB in the repetition period of the specific SIB is specified in the transmission timing pattern, the specific SIB is transmitted in each subframe except the subframe in which the SIB1 is transmitted and the subframe in which the MBSFN is transmitted. For a TDD system, the subframes in which a particular SIB is transmitted are also not uplink subframes and special subframes.

The processing procedure of the network side can be described as follows:

the base station selects a transmission opportunity pattern from the transmission opportunity patterns for transmitting the specific SIB agreed by the protocol (as shown in fig. 4). And in each repetition period of the specific SIB, sending a PDCCH for scheduling the specific SIB on a radio frame with the system frame numbers of 2, 4, 6 and 7, and sending the specific SIB.

Specifically, if the selected transmission timing pattern only specifies the number of radio frames in the SI period for transmitting a specific SIB. The base station sends the PDCCH for scheduling the specific SIB on each subframe except the subframe where the SIB1 is transmitted and the subframe where the MBSFN is transmitted in the radio frames with the system frame numbers of 2, 4, 6 and 7, the DCI of the PDCCH transmitted on the subframes is the same, and the specific SIB is sent on the time-frequency resource scheduled by the PDCCH on the subframes. For a TDD system, the subframes in which a particular SIB is transmitted are also not uplink subframes and special subframes.

If the selected transmission occasion pattern specifies the relative position of the subframe in which the specific SIB is transmitted in the repetition period of the specific SIB. The base station sends the PDCCH for scheduling the specific SIB on the subframes specified in the radio frames with the system frame numbers of 2, 4, 6 and 7, the DCI of the PDCCH transmitted on the subframes is the same, and the specific SIB is sent on the time-frequency resource scheduled by the PDCCH on the subframes.

The specific implementation manner of selecting the transmission timing pattern is determined according to the actual communication requirement, for example, the timing for transmitting the specific SIB, which is specified by the selected transmission timing pattern, needs to avoid the subframe for transmitting the SIB1 and the subframe for transmitting the MBSFN. For TDD systems, uplink subframes and special subframes also need to be avoided.

Further, in each repetition period of the specific SIB, the base station also carries the selection result of the transmission timing pattern in the SIB1 and transmits the result to the terminal. The selection result may be the specific content of the selected transmission timing pattern, or may be the identifier or number of the selected transmission timing pattern.

If the length of the repetition period of the particular SIB is determined by the base station, the base station also carries the length of the SI period corresponding to the particular SIB in the SIB 1.

The processing procedure of the terminal side can be described as follows:

the terminal acquires the result of selecting the transmission timing for transmitting the SIB from the received SIB1 in each repetition period of the specific SIB. The transmission timing pattern indicated by the selection result is determined from the transmission timing pattern for transmitting the specific SIB agreed by the protocol (as shown in fig. 4). And in each repetition period of the specific SIB, receiving a PDCCH for scheduling the specific SIB on a radio frame with the system frame numbers of 2, 4, 6 and 7, and receiving the specific SIB.

In particular, if the determined transmission occasion pattern specifies the relative position of the radio frame transmitting the particular SIB in the repetition period of the particular SIB. The terminal receives the PDCCH for scheduling the specific SIB on each subframe except the subframe where the SIB1 is transmitted and the subframe where the MBSFN is transmitted in the radio frames with the system frame numbers of 2, 4, 6, and 7, and the DCI of the PDCCH transmitted on these subframes is the same. And after the PDCCH is correctly demodulated by combining the received signals, the scheduling information of the specific SIB is obtained. Of course, if the PDCCH is correctly demodulated by combining signals received on a part of subframes, the PDCCH is not continuously received subsequently. After acquiring the scheduling information of the specific SIB, the terminal receives downlink signals on the time-frequency resources indicated by the scheduling information of the specific SIB on the subframes. And correctly demodulating the specific SIB by combining the received downlink signals. Of course, if the specific SIB is correctly demodulated by combining the signals received on the partial subframes, the downlink signal does not continue to be received on the time-frequency resource indicated by the scheduling information. For a TDD system, the subframes in which a particular SIB is transmitted are also not uplink subframes and special subframes.

If the determined transmission occasion pattern specifies the number of subframes in the radio frame in which the particular SIB is transmitted and the relative position of the radio frame in the repetition period of the particular SIB. The base station receives the PDCCH for scheduling the specific SIB on the subframes specified in the radio frames with the system frame numbers 2, 4, 6 and 7, and the DCI of the PDCCH transmitted on these subframes is the same. And after the PDCCH is correctly demodulated by combining the received signals, the scheduling information of the specific SIB is obtained. Of course, if the PDCCH is correctly demodulated by combining signals received on a part of subframes, the PDCCH is not continuously received subsequently.

After acquiring the scheduling information of the specific SIB, the terminal receives downlink signals on the time-frequency resources indicated by the scheduling information of the specific SIB on the subframes. And correctly demodulating the specific SIB by combining the received downlink signals. Of course, if the specific SIB is correctly demodulated by combining the signals received on the partial subframes, the downlink signal does not continue to be received on the time-frequency resource indicated by the scheduling information.

The terminal also acquires the length of the repetition period of the specific SIB from the SIB1 if the length of the repetition period of the specific SIB is determined by the base station.

Based on the same inventive concept as the method, as shown in fig. 6, an embodiment of the present invention further provides a base station, including:

a scheduling information sending module 601, configured to repeatedly send scheduling information of a specific SIB in each repetition period of the specific SIB;

an SIB sending module 602, configured to repeatedly send a specific SIB at a scheduling occasion of the specific SIB in each repetition period of the specific SIB, where the specific SIB is an SIB required for a terminal to communicate.

Because the network side repeatedly sends the specific SIB in a repetition period, the number of times of repetition in an SIB modification period is at least doubled compared with the prior art, thereby meeting the demodulation requirements of the terminal and improving the system performance.

Based on a scheduling occasion, the SIB sending module 602 may specifically be configured to:

repeatedly transmitting a specific SIB in M consecutive radio frames per repetition period of the specific SIB.

Preferably, the SIB sending module 602 is specifically configured to:

transmitting a specific SIB over all or part of subframes of consecutive M radio frames per repetition period of the specific SIB.

The subframe in which the particular SIB is sent is not the subframe in which SIB1 and the multicast/multicast single frequency network MBSFN transmission are located. For a TDD system, the subframe in which a specific SIB is transmitted is also not an uplink subframe and a special subframe.

Based on any implementation manner of the scheduling opportunity, the starting radio frame of the continuous M radio frames is adjacent to the last radio frame of other SIBs scheduled in each repetition period of the specific SIB; or,

the continuous M wireless frames are the last M wireless frames of the repetition period.

Based on another implementation, the SIB sending module 602 may specifically be configured to:

selecting a transmission opportunity pattern from pre-agreed transmission opportunity patterns for transmitting the specific SIB, the transmission opportunity pattern for transmitting the specific SIB specifying a relative position of a radio frame in which the specific SIB is transmitted in a repetition period of the specific SIB, or the transmission opportunity pattern for transmitting the specific SIB specifying a number of a subframe in which the specific SIB is transmitted in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB;

repeatedly transmitting the specific SIB according to the selected transmission opportunity pattern in each repetition period corresponding to the specific SIB;

and in each repetition period corresponding to the specific SIB, carrying the selection result of the transmission opportunity pattern in the SIB1 and transmitting the selection result to the terminal.

Based on any of the foregoing embodiments of the base station, preferably, the scheduling information sending module 601 is specifically configured to:

and in each repetition period of the specific SIB, sending a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe sending the specific SIB, wherein DCI carried by each PDCCH is the same.

Based on the same inventive concept as the method, as shown in fig. 7, an embodiment of the present invention further provides a terminal, including:

a scheduling information receiving module 701, configured to repeatedly receive scheduling information of a specific SIB in each repetition period of the specific SIB, where the specific SIB is an SIB required for a terminal to communicate;

an SIB receiving module 702, configured to repeatedly receive, in each repetition period of a specific SIB after acquiring the scheduling information of the specific SIB, a downlink signal at a scheduling timing of the specific SIB, so as to acquire the specific SIB according to the received downlink signal.

Because the terminal can repeatedly receive the downlink signal at the scheduling opportunity of the specific SIB in a repetition period, if the repetition times are enough, the downlink signal received in the repetition period can be combined so as to correctly demodulate the specific SIB. Even if the specific SIB cannot be correctly demodulated in one repetition period, the number of repetitions in one SIB modification period is at least doubled compared to the prior art because the specific SIB is repeatedly transmitted in the repetition period, thereby satisfying the demodulation requirements of the terminal and improving the system performance.

Based on a scheduling occasion, the SIB receiving module 702 may specifically be configured to:

and repeatedly receiving the downlink signal in M continuous radio frames of each repetition period of the specific SIB.

Preferably, the SIB receiving module 702 is specifically configured to:

and receiving the downlink signal on all or part of subframes of continuous M radio frames of each repetition period of a specific SIB. The subframe for receiving the downlink signal is not the subframe where the SIB1 and the multicast/multicast single frequency network MBSFN transmission are located. For the TDD system, the subframe receiving the downlink signal is not an uplink subframe or a special subframe.

Based on any embodiment of the scheduling occasion, the starting radio frame of the M consecutive radio frames is adjacent to the last radio frame in each repetition period of the specific SIB, where other SIBs are scheduled; or, the consecutive M radio frames are the last M radio frames of the repetition period.

Based on another scheduling occasion, the SIB receiving module 702 may specifically be configured to:

acquiring, from the received SIB1, a selection result of a transmission timing pattern for transmitting a specific SIB specifying a relative position of a radio frame in which the specific SIB is transmitted in a repetition period of the specific SIB, or specifying a number of a subframe in which the specific SIB is transmitted in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB, in each repetition period of the specific SIB;

determining a transmission opportunity pattern indicated by the selection result from a transmission opportunity pattern for transmitting the specific SIB agreed in advance;

and repeatedly receiving the downlink signal according to the determined transmission timing pattern in each repetition period of the specific SIB.

Based on any of the terminal-side embodiments described above, preferably, the scheduling information receiving module 701 is specifically configured to:

and in each repetition period of the specific SIB, receiving a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe for receiving the downlink signal, wherein DCI carried by each PDCCH is the same.

Based on the same inventive concept as the method, an embodiment of the present invention further provides another base station, including:

the processor is configured to repeatedly transmit the scheduling information of the specific SIB through the radio frequency unit in each repetition period of the specific SIB, and repeatedly transmit the specific SIB through the radio frequency unit at the scheduling timing of the specific SIB, wherein the specific SIB is a SIB required by a terminal to communicate.

Because the network side repeatedly sends the specific SIB in a repetition period, the number of times of repetition in an SIB modification period is at least doubled compared with the prior art, thereby meeting the demodulation requirements of the terminal and improving the system performance.

The specific implementation manner of the embodiment of the base station may refer to the description of the embodiment of the base station, and is not described herein again.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a terminal, including:

the processor is configured to repeatedly receive scheduling information of a specific SIB through the radio frequency unit in each repetition period of the specific SIB, wherein the specific SIB is a SIB required by a terminal for communication; after the scheduling information of the specific SIB is acquired, repeatedly receiving downlink signals at the scheduling time of the specific SIB through a radio frequency unit in each repetition period of the specific SIB, so as to acquire the specific SIB according to the received downlink signals.

Because the terminal can repeatedly receive the downlink signal at the scheduling opportunity of the specific SIB in a repetition period, if the repetition times are enough, the downlink signal received in the repetition period can be combined so as to correctly demodulate the specific SIB. Even if the specific SIB cannot be correctly demodulated in one repetition period, the number of repetitions in one SIB modification period is at least doubled compared to the prior art because the specific SIB is repeatedly transmitted in the repetition period, thereby satisfying the demodulation requirements of the terminal and improving the system performance.

The specific implementation manner of the terminal embodiment may refer to the description of the terminal embodiment, and repeated descriptions are omitted.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (16)

1. A method for transmitting system information, wherein a specific system information block SIB is transmitted in each repetition period, the method comprising:

repeatedly transmitting scheduling information of the specific SIB; the specific SIB is a SIB required for a terminal to communicate and is distinct from SIB 1;

repeatedly sending the specific SIB at a scheduling occasion of the specific SIB, wherein the scheduling occasion of the specific SIB includes M consecutive radio frames of a repetition period of the specific SIB, and the M consecutive radio frames are the last M radio frames of the repetition period, or a starting radio frame of the M consecutive radio frames is adjacent to the last radio frame of the repetition period of the specific SIB, in which other SIBs are scheduled.

2. The method of claim 1, wherein repeatedly transmitting the particular SIB in M consecutive radio frames of a repetition period of the particular SIB comprises:

transmitting the specific SIB over all or a portion of subframes of the consecutive M radio frames.

3. The method of claim 1, wherein the scheduling occasion of the particular SIB further comprises:

a transmission opportunity pattern selected from a pre-agreed transmission opportunity pattern for transmitting the specific SIB, wherein the transmission opportunity pattern of the specific SIB specifies a relative position of a radio frame for transmitting the specific SIB in a repetition period of the specific SIB, or a number of subframes for transmitting the specific SIB in a radio frame and a relative position of the radio frame in the repetition period of the specific SIB;

repeatedly transmitting the specific SIB according to the selected transmission timing pattern;

within each repetition period of a particular SIB, the method further comprises:

and carrying the selection result of the transmission opportunity pattern in an SIB1 and transmitting the selection result to the terminal.

4. The method according to any of claims 1 to 3, wherein repeatedly transmitting the scheduling information of the specific SIB comprises:

and sending a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on the subframe for sending the specific SIB, wherein DCI (downlink control information) carried by each PDCCH is the same.

5. A method for receiving system information, wherein each repetition period of a specific SIB, the method comprising:

repeatedly receiving the scheduling information of the specific SIB, wherein the specific SIB is a SIB which is required by the terminal for communication and is different from the SIB 1;

after the scheduling information of the specific SIB is acquired, repeatedly receiving a downlink signal at a scheduling occasion of the specific SIB to acquire the specific SIB according to the received downlink signal, where the scheduling occasion of the specific SIB includes M consecutive radio frames of a repetition period of the specific SIB, and the M consecutive radio frames are the last M consecutive radio frames of the repetition period, or a starting radio frame of the M consecutive radio frames is adjacent to the last radio frame of the specific SIB in the repetition period in which other SIBs are scheduled.

6. The method of claim 5, wherein repeatedly receiving the downlink signal in M consecutive radio frames of the repetition period of the specific SIB comprises:

and receiving the downlink signal on all or part of subframes of the continuous M radio frames.

7. The method of claim 5, wherein the scheduling occasion within each repetition period of the particular SIB further comprises:

obtaining, from the received SIB1, a selection result of a transmission timing pattern for transmitting the specific SIB, wherein the transmission timing pattern of the specific SIB specifies a relative position of a radio frame in which the specific SIB is transmitted in a repetition period of the specific SIB, or a number of subframes in which the specific SIB is transmitted in the radio frame and the relative position of the radio frame in the repetition period of the specific SIB;

repeatedly receiving downlink signals at the scheduling occasion of the specific SIB, including:

determining a transmission opportunity pattern indicated by the selection result from a transmission opportunity pattern for transmitting the specific SIB agreed in advance;

and repeatedly receiving the downlink signal according to the determined transmission timing pattern.

8. The method of any of claims 5 to 7, wherein repeatedly receiving the scheduling information of the specific SIB comprises:

and receiving a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe for receiving the downlink signal, wherein DCI carried by each PDCCH is the same.

9. A base station, comprising:

a scheduling information sending module, configured to repeatedly send scheduling information of a specific SIB in each repetition period of the specific SIB; the specific SIBs being SIBs required for the terminal to communicate and being distinct from SIB1

An SIB sending module, configured to repeatedly send a specific SIB at a scheduling timing of the specific SIB in each repetition period of the specific SIB, where the scheduling timing of the specific SIB includes consecutive M radio frames of the repetition period of the specific SIB, and the consecutive M radio frames are last M radio frames of the repetition period, or a starting radio frame of the consecutive M radio frames is adjacent to a last radio frame of the specific SIB in which other SIBs are scheduled.

10. The base station of claim 9, wherein the SIB transmission module is specifically configured to:

transmitting the specific SIB over all or a portion of subframes of the consecutive M radio frames.

11. The base station of claim 9, wherein the SIB transmission module is specifically configured to:

selecting a transmission opportunity pattern from pre-agreed transmission opportunity patterns for transmitting the specific SIB, wherein the transmission opportunity pattern of the specific SIB specifies a relative position of a radio frame for transmitting the specific SIB in a repetition period of the specific SIB, or a number of subframes for transmitting the specific SIB in the radio frame and the relative position of the radio frame in the repetition period of the specific SIB;

repeatedly transmitting a specific SIB according to a selected transmission timing pattern in each repetition period of the specific SIB;

and in each repetition period of a specific SIB, carrying a selection result of the transmission opportunity pattern in the SIB1 and transmitting the selection result to the terminal.

12. The base station according to any of claims 9 to 11, wherein the scheduling information sending module is specifically configured to:

and in each repetition period of the specific SIB, sending a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe sending the specific SIB, wherein DCI carried by each PDCCH is the same.

13. A terminal, comprising:

a scheduling information receiving module, configured to repeatedly receive scheduling information of a specific SIB in each repetition period of the specific SIB, where the specific SIB is a SIB which is required for a terminal to communicate and is different from SIB 1;

an SIB receiving module, configured to repeatedly receive, within each system information repetition period of a specific SIB, a downlink signal at a scheduling timing of the specific SIB to obtain the specific SIB according to the received downlink signal, where the scheduling timing of the specific SIB includes consecutive M radio frames of the repetition period of the specific SIB, and the consecutive M radio frames are last M radio frames of the repetition period, or a starting radio frame of the consecutive M radio frames is adjacent to a last radio frame of another SIB scheduled in the repetition period of the specific SIB.

14. The terminal of claim 13, wherein the SIB receiving module is specifically configured to:

and receiving the downlink signal on all or part of subframes of the continuous M radio frames.

15. The terminal of claim 13, wherein the SIB receiving module is specifically configured to:

acquiring, from the received SIB1, a selection result of a transmission timing pattern for transmitting a specific SIB specifying a relative position of a radio frame in which the specific SIB is transmitted in the repetition period of the specific SIB, or a number of subframes in which the specific SIB is transmitted in the radio frame and a relative position of the radio frame in the repetition period of the specific SIB, in each repetition period of the specific SIB;

determining a transmission opportunity pattern indicated by the selection result from a transmission opportunity pattern for transmitting the specific SIB agreed in advance;

and repeatedly receiving the downlink signal according to the determined transmission timing pattern in each repetition period of the specific SIB.

16. The terminal according to any one of claims 13 to 15, wherein the scheduling information receiving module is specifically configured to:

and in each repetition period of the specific SIB, receiving a Physical Downlink Control Channel (PDCCH) for scheduling the specific SIB on a subframe for receiving the downlink signal, wherein DCI carried by each PDCCH is the same.