WO2017036385A1

WO2017036385A1 - System message transmission method and device

Info

Publication number: WO2017036385A1
Application number: PCT/CN2016/097379
Authority: WO
Inventors: 戴博; 夏树强; 郁光辉; 胡留军; 袁弋非
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-02
Filing date: 2016-08-30
Publication date: 2017-03-09

Abstract

The present application relates to the field of wireless communication, and provides a system message transmission method and device. The method comprises: transmitting a system message at a predetermined resource location; and transmitting, according to the system message, a physical downlink signal channel, wherein the system message comprises at least one of the following: frequency-domain location information of a system, configuration information of a physical shared channel carrying the system message, access configuration information of a terminal, available resource information of the physical downlink channel and radio frame information. By combining predetermined transmission and signaling indication, the present invention can reduce inter-signal interference in a scenario where a spectrum is shared by different systems, and minimize occurrences of the condition in which different systems simultaneously perform different signal transmission with the same resource, thereby ensuring agreement between a system and a terminal, and improving the data transmission performance.

Description

System message transmission method and device

Technical field

This document relates to, but is not limited to, the field of wireless communications, and in particular, to a system message transmission method and apparatus.

Background technique

Machine Type Communication (MTC) User Equipment (User Equipment, Terminal Equipment for short), also known as Machine to Machine (M2M) user communication equipment, is the main application form of the Internet of Things. . Several technologies suitable for the Cell Of Things (C-IOT) are disclosed in the 3GPP (3rd Generation Partnership Project) Technical Report TR45.820V200, in which NB-LTE (Narrowband) Long Term Evolution, the technology of narrow-band long-term evolution, is the most eye-catching. The system bandwidth of the system is 200 kHz, which is the same as the channel bandwidth of GSM (Global System for Mobile Communication). This is a great result for the NB-LTE system to reuse the GSM spectrum and reduce the mutual interference between the adjacent and GSM channels. convenient. In addition, the transmission bandwidth and the downlink subcarrier spacing of the NB-LTE are 180 kHz and 15 kHz, respectively, which are the same as the bandwidth and subcarrier spacing of one PRB (Physical Resource Block) of the LTE system, which is advantageous in this respect. In the NB-LTE system, the relevant design of the relevant LTE system is reused. When the GSM spectrum reused by the NB-LTE system is adjacent to the spectrum of the LTE system, it is also beneficial to reduce mutual interference between the two systems.

On the other hand, the sub-carrier spacing of the relevant LTE system is 15 kHz, and the following six system bandwidths are supported: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz, and the six bandwidths are 72, 150, 300, 600, 900, respectively. 1200 available subcarriers. Considering that the transmission bandwidth and downlink subcarrier spacing of NB-LTE are the same as the bandwidth and subcarrier spacing of one PRB of the LTE system, NB-LTE may coexist in the same spectrum as the LTE system, for example, the system bandwidth is 20 MHz. In the LTE system, a 180 kHz bandwidth is allocated for the transmission of signals in the NB-LTE system, but since some resources of the LTE system have been pre-occupied, in order to ensure the NB-LTE system The signals of the LTE system and the LTE system are not transmitted on the same resource, which reduces the mutual interference between the two systems. Currently, there is still an effective solution.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a system message transmission method and apparatus, which can reduce mutual interference between signals in different systems when spectrum sharing, and reduce different systems to simultaneously transmit different signals on the same resource.

The technical solution adopted by the embodiment of the present invention is as follows:

A system message transmission method includes: transmitting a system message on a preset resource location;

Transmitting a physical downlink channel according to the system message, where the system message includes at least one of: frequency domain location information of the system, configuration information of a physical shared channel carrying a system message, configuration information of the terminal access, and the physical Downstream channel available resource information, radio frame information.

Optionally, the physical downlink channel available resource information includes: the physical downlink channel starts orthogonal frequency division multiplexing OFDM symbol information in one subframe, and/or, the physical downlink channel is in one subframe. Resource unit information not used, and/or subframe information usable by the physical downlink channel.

Optionally, the method further includes: indicating the resource unit information by a cell-specific reference signal CRS port location and/or a channel state information reference signal CSI-RS port location; the cell-specific reference signal port location and / or channel state information reference signal port location indication is determined by the number of ports and / or virtual cell identity.

Optionally, transmitting the system message on the preset resource location includes:

The system message is transmitted over a physical broadcast channel at a preset resource location.

Optionally, the preset resource location includes: the physical broadcast channel is located on a last Y OFDM symbols of a first slot of a subframe and a first X OFDM symbols of a second slot, or The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R includes 4, 5, 6, 8, and the predefined OFDM symbols include: each time slot The second OFDM symbol, the third OFDM symbol per slot, the fourth OFDM symbol in the last of each slot, and the last two OFDM symbols of each slot.

Optionally, the X includes: 4, 5, 6, and 7, and the Y includes 0, 1, 2, 3, 4, and 5.

Optionally, the first predefined OFDM symbol comprises one of the following:

When R is 4, the first predefined OFDM symbol includes the last two OFDM symbols of each slot;

When R is 5, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of a second slot, or the first predefined OFDM symbol includes each The last two OFDM symbols of the time slot and the third OFDM symbol of the second time slot;

When R is 6, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of a second slot, and a second OFDM symbol of a second slot Or the first predefined OFDM symbol includes a last two OFDM symbols of each slot and a fourth OFDM symbol of each slot; or the first predefined OFDM symbol includes each slot a second OFDM symbol and a second OFDM symbol of the second slot, and a third OFDM symbol of the second slot;

When R is 8, the first predefined OFDM symbol includes the second and third OFDM symbols of each slot, and the last two OFDM symbols.

Optionally, the physical broadcast channel and the synchronization channel are located on adjacent subframes.

Optionally, the physical broadcast channel and the synchronization channel are located on adjacent subframes, including one of the following:

The synchronization channel is located in subframe #9, and the physical broadcast channel is located in subframe #0;

The synchronization channel is located in subframe #0, and the physical broadcast channel is located in subframe #9;

The synchronization channel is located in subframe #8, and the physical broadcast channel is located in subframe #9;

The synchronization channel is located in subframe #6, and the physical broadcast channel is located in subframe #5;

The synchronization channel is located in subframe #4, and the physical broadcast channel is located in subframe #5;

The synchronization channel is located in subframe #5, and the physical broadcast channel is located in subframe #4;

The synchronization channel is located in subframe #3, and the physical broadcast channel is located in subframe #4;

The synchronization channel is located in subframe #1, and the physical broadcast channel is located in subframe #0.

Optionally, the preset resource location includes: the physical broadcast channel is mapped to T radio frames, and the subframe position of each radio frame is the same, and T includes: 3, 6, 9, 18, 36 .

Optionally, the subframe includes one or more of the following: subframe #0 of the radio frame, subframe #4 of the radio frame, subframe #5 of the radio frame, or subframe #9 of the radio frame.

Optionally, the physical broadcast channel is transmitted once in Z1 radio frames, and is transmitted Z3 times every Z1*Z2 radio frames.

Optionally, the Z1 includes 4, 6, 8, 12, 24, and the Z2 includes 4, 6, 8, 12, 16.

Optionally, the physical broadcast channel is demodulated using a narrowband reference signal transmitted on a subframe in which the physical broadcast channel is transmitted: a narrowband reference signal in a second predefined Orthogonal Frequency Division Multiplexing (OFDM) On-symbol transmission, wherein the second predefined OFDM symbol comprises: the last two OFDM symbols of each slot in the subframe, or on each OFDM symbol of the transmission physical broadcast channel.

The system message is transmitted over a physical shared channel at a preset resource location, or transmitted over a physical shared channel and a physical broadcast channel at a predetermined resource location.

Optionally, transmitting, by using the physical shared channel, the system message on the preset resource location includes:

The physical shared channel carrying the system message has a fixed OFDM symbol in the subframe, and the corresponding available resource unit is the remaining resource after removing the fixed virtual cell-specific reference signal port.

Optionally, the physical shared channel, the synchronization channel, and the physical broadcast channel of the bearer system message are located on different subframes.

Optionally, the physical shared channel subframe of the bearer system message includes one or more subframes of subframe #0, subframe #4, subframe #5, and subframe #9.

Optionally, the configuration information of the physical shared channel carrying the system message includes at least one of the following:

The physical shared channel carries the number of bits of system information;

The number of subframes occupied by the physical shared channel;

Radio frame information occupied by the physical shared channel;

The configuration information of terminal access includes:

Whether to allow terminal access, and/or system status information, and/or terminal uplink access resource configuration information; the system status information is used by the terminal to determine whether to access the system, and/or how to access the system.

The embodiment of the invention further provides a system message transmission device, including:

a system module configured to transmit a system message on a preset resource location;

a channel module, configured to transmit a physical downlink channel according to the system message, where the system message includes at least one of: frequency domain location information of the system, configuration information of a physical shared channel carrying a system message, and configuration of a terminal access Information, physical downlink channel available resource information, and radio frame information.

Optionally, the physical downlink channel available resource information includes: the physical downlink channel starts orthogonal frequency division multiplexing OFDM symbol information in one subframe, and/or, the physical downlink channel is in one subframe. Resource unit information not used, and/or subframe information usable by the physical downlink channel;

The apparatus further includes an indication module configured to indicate the resource unit information with a cell-specific reference signal CRS port location and/or a channel state information reference signal CSI-RS port location; the cell-specific reference signal port location and / or channel state information reference signal port location indication is determined by the number of ports and / or virtual cell identity.

Optionally, the system module is configured to transmit a system message on a preset resource location by:

Optionally, the preset resource location includes: the physical broadcast channel is located on a last Y OFDM symbols of a first slot of a subframe and a first X OFDM symbols of a second slot, or The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R includes 4, 5, 6, 8, and the predefined OFDM symbols include: Two OFDM symbols, the fourth OFDM symbol in the last of each slot, the last two OFDM symbols in each slot, and the third OFDM symbol in each slot.

Optionally, the first predefined OFDM symbol comprises one of the following:

Optionally, the subframe includes one or more of the following: a subframe #0 of a radio frame, a radio frame Subframe #4, subframe #5 of the radio frame or subframe #9 of the radio frame.

Optionally, the physical broadcast channel of the system module is transmitted once in Z1 radio frames, and is transmitted Z3 times every Z1*Z2 radio frames.

Optionally, the system module is configured to transmit the system message by using a physical shared channel on a preset resource location by:

The physical shared channel carries the number of bits of system information;

The number of subframes occupied by the physical shared channel;

Radio frame information occupied by the physical shared channel;

The configuration information of terminal access includes:

Compared with the related art, the embodiment of the present invention has the following beneficial effects:

The method and device for transmitting a system message according to an embodiment of the present invention transmits a system message at a preset resource location, and then transmits a physical downlink channel according to the system message, and the method for combining the predefined transmission and the signaling indication can be reduced. Mutual interference between signals when different systems are shared by spectrum, reducing the situation that different systems transmit different signals simultaneously on the same resource, ensuring consistent understanding between the system and the terminal, and improving data transmission performance.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic diagram of a frame structure of an LTE system in the related art;

2 is a flowchart of a system message transmission method according to an embodiment of the present invention;

3 is a schematic structural diagram of a system message transmission apparatus according to an embodiment of the present invention;

4 to 7 are structural diagrams showing the position of a narrowband reference signal according to an embodiment of the present invention.

Embodiments of the invention

The embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other without conflict.

A radio frame in a Long Term Evolution (LTE) system includes a frame structure of a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode. The frame structure of the FDD mode, as shown in Figure 1, a 10 msec (ms) radio frame consists of twenty slots of length 0.5 ms, numbered 0-19, and slots 2i and 2i+1. A subframe of length 1 ms. For the normal cyclic prefix (Normal CP, Normal Cyclic Prefix), one slot contains seven symbols with a length of 66.7 microseconds (us), where the CP length of the first symbol is 5.21us, and the length of the remaining six symbols is 4.69. For extended cyclic prefix (Extended Cyclic Prefix), one slot contains 6 symbols, and the CP length of all symbols is 16.67us.

The number of cell-specific reference signal ports in the LTE system is 1, 2, and 4, and the number of channel state information reference signal ports is 1, 2, 4, and 8. The number of different ports corresponds to different numbers of resource units and locations;

The downlink control channel in the LTE system is located on the first n OFDM symbols of the subframe, and n is 1, 2, 3, and 4;

The NB-LTE system uses single-port transmission. In addition, since the bandwidth of the NB-LTE system is only 200k, the time domain resources occupied by the NB-LTE PBCH (Physical Broadcast Channel) and synchronization signals are increased relative to the LTE system. Therefore, the PBCH and synchronization signal mapping methods of the LTE system are no longer applicable in the NB-LTE system, and need to be reconsidered, and when the NB-LTE system and the LTE system share spectrum, if the NB-LTE system does not bypass the LTE system. The resources used by the control channel and the downlink reference signal are still working in the independent use of the resource scenario without spectrum sharing, which will cause mutual interference between different system signals. Different systems simultaneously transmit different signals on the same resource, affecting UE data reception. Therefore, the NB-LTE system needs to send a system message to the NB-LTE UE to inform its available resources, so that the NB-LTE system separately performs data transmission according to whether the spectrum is shared, and also ensures understanding between the NB-LTE system and the NB-LTE UE. Consistent

As shown in FIG. 2, an embodiment of the present invention provides a system message transmission method, including:

Transmitting system messages on preset resource locations;

The physical downlink channel includes: a physical downlink shared channel and/or a physical downlink control channel;

The method of the embodiments of the present invention can be applied to the following systems: NB-LTE, or other OFDM systems, or other narrowband systems. The transmission includes: transmitting and/or receiving.

The physical downlink channel available resource information includes: the physical downlink channel starts Orthogonal Frequency Division Multiplexing (OFDM) symbol information in one subframe, and/or, the physical downlink channel is not used in one subframe. Resource unit information, and/or subframe information usable by the physical downlink channel.

The subframe information indication that can be used by the physical downlink channel includes: periodically indicating an available subframe by using a bitmap, or periodically indicating a subframe that is unavailable by using a bitmap, such as: Use J bits to indicate whether each subframe in the period is J subframes. In use, each bit corresponds to one subframe usage in J subframe periods, 1 is usable, 0 is not available, or 0 is usable, 1 is not available, and J is 40 , 80, 120, 160, 240.

The method further includes: indicating the resource unit information by a cell-specific reference signal CRS port location and/or a channel state information reference signal CSI-RS (Channel State Information Reference Signal) port location; the cell-specific reference signal port The location and/or channel state information reference signal port location indication is determined by the number of ports and/or virtual cell identity.

The transmission of system messages on a preset resource location includes:

The physical broadcast channel is located on the last Y OFDM symbols of the first slot of the subframe and the first X OFDM symbols of the second slot.

Wherein, the X includes: 4, 5, 6, and 7, and the Y includes 0, 1, 2, 3, 4, and 5.

or,

The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R optionally includes 4, 5, 6, 8, and the predefined OFDM symbols include: each time The second OFDM symbol of the slot, the third OFDM symbol per slot, the fourth last OFDM symbol of each slot, and the last two OFDM symbols of each slot.

Optionally, when R is 4, the first predefined OFDM symbol includes the last two OFDM symbols of each time slot;

Optionally, when R is 5, the first predefined OFDM symbol includes a last OFDM symbol of each time slot and a fourth OFDM symbol of a second time slot, or the first predefined The OFDM symbol includes the last two OFDM symbols of each slot and the third OFDM symbol of the second slot;

Optionally, when R is 6, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of the second slot, and a second slot Two OFDM symbols; or, the first predefined OFDM symbol includes a last two OFDM symbols of each slot and a fourth OFDM symbol of each slot; or the first predefined OFDM symbol includes each The last two OFDM symbols of the time slot and the second of the second time slot OFDM symbol, third OFDM symbol of the second time slot;

Optionally, when R is 8, the first predefined OFDM symbol includes a second and a third OFDM symbol of each slot, and a last two OFDM symbols.

The narrowband reference signal is transmitted on a second predefined OFDM symbol, wherein the second predefined OFDM symbol comprises: a last two OFDM symbols of each slot in the subframe, or each of the transmitted physical broadcast channels On the OFDM symbol;

The narrowband reference signal is used for physical broadcast channel demodulation; the narrowband reference signal is transmitted on a subframe in which the physical broadcast channel is transmitted;

The number of antenna ports of the narrowband reference signal is 1 or 2, the reference signal of the same port is 6 subcarriers in the frequency domain, and the frequency domain of the reference signal of the same port on the adjacent OFDM symbol is offset by 3;

The initial position of the antenna port of the narrowband reference signal is determined according to the cell identifier;

When the cyclic prefix is a regular cyclic prefix, as shown in FIG. 4 and FIG. 6, where l is an OFDM symbol index;

When the cyclic prefix is an extended cyclic prefix, as shown in FIG. 5 and FIG. 7, where l is an OFDM symbol index;

Wherein R0 is the first port, and R1 is the second port;

Optionally, the first predefined symbol is an OFDM symbol that is not sent by the LTE system cell-specific reference signal, and the physical broadcast channel is transmitted on the first predefined symbol to reduce a cell-specific reference signal for the physical broadcast. The influence of the channel, especially in the new system (narrowband system) and the LTE system on the same spectrum, the corresponding cell identifiers of the two do not affect each other.

In addition, the optional first pre-defined symbol mainly considers the influence of the demodulation performance of the narrow-band reference signal, and ensures that the OFDM symbol carrying the physical broadcast channel is located on the OFDM symbol where the narrow-band reference signal is located. The first predefined symbol is suboptimally selected as an intermediate region on the OFDM symbol where the narrowband reference signal is located, thereby obtaining better transmission performance.

The physical broadcast channel and the synchronization channel are located on adjacent subframes; including one of the following:

The physical broadcast channel is mapped onto T radio frames, and the subframe positions located in each radio frame are the same. T is optional 3, 6, 9, 18, 36; the mapping refers to a single transmission of a physical broadcast channel, and does not involve resource definition of a repeated transmission scenario of a physical broadcast channel.

The subframe includes one or more of subframe #0 of the radio frame, subframe #4 of the radio frame, subframe #5 of the radio frame, or subframe #9 of the radio frame.

The physical broadcast channel is transmitted once in Z1 radio frames, and is transmitted Z3 times per Z1*Z2 radio frames. Wherein, Z1 includes 4, 6, 8, 12, 24, and Z2 includes 4, 6, 8, 12, 16.

The transmission of system messages on a preset resource location includes:

Transmitting the system message through a physical shared channel at a preset resource location, or transmitting the system message over a physical shared channel and a physical broadcast channel at a preset resource location, wherein the physical shared channel carrying the system message The starting OFDM symbol is a fixed value in the subframe, and the available resource unit is the remaining resource after removing the fixed virtual cell-specific reference signal port.

The location of the virtual cell-specific reference signal port is the same as the corresponding resource location of the CRS port (single-port, two-port, and four-port) in the related LTE system; the resource unit corresponding to the fixed virtual cell-specific reference signal port may be associated with the LTE. a resource unit corresponding to a four-port CRS in the system;

The physical shared channel, the synchronization channel, and the physical broadcast channel of the bearer system message are located in different subframes. The physical shared channel subframe of the bearer system message includes one or more subframes of subframe #0, subframe #4, subframe #5, and subframe #9.

For example, the synchronization channel and the physical broadcast channel are respectively located in subframe #4 and subframe #5 of the radio frame (both can be exchanged with each other), and the physical shared channel of the bearer system message is located in subframe #9 and/or subframe #0. , Alternatively, the synchronization channel and the physical broadcast channel are respectively located in subframe #9 and subframe #0 of the radio frame (both can be exchanged with each other), and the physical shared channel of the bearer system message is located in subframe #4 and/or subframe #5 .

The physical shared channel of the bearer system message is located on W consecutive radio frames; W is optional 3, 6, 9, 12;

As shown in FIG. 3, a system message transmission device includes:

The physical downlink channel available resource information includes: the physical downlink channel starts Orthogonal Frequency Division Multiplexing (OFDM) symbol information in one subframe, and/or the physical downlink channel does not use resources in one subframe. Unit information, and or, subframe information usable by the physical downlink channel;

The device also includes:

The indication module is configured to indicate the resource unit information with a cell-specific reference signal CRS port location and/or a channel state information reference signal CSI-RS port location.

Optionally, the cell-specific reference signal port location and/or channel state information reference signal port location indication is determined by the number of ports, and/or the virtual cell identifier;

The virtual cell identifier is used to indicate a cell identifier of the LTE system when the new system (narrowband system) and the LTE system coexist, to determine the reference signal location;

The virtual cell identifier includes: an LTE cell identifier or a predefined offset value; the predefined offset value includes: 0, 1, 2, 3, 4, 5;

The subframe information indication that can be used by the physical downlink channel includes: periodically indicating an available subframe by using a bitmap, or periodically indicating a subframe that is unavailable by using a bitmap, such as: Use J bits to indicate whether each subframe in the period of J subframes can be used. Each bit corresponds to one subframe usage in J subframe periods, 1 is usable, 0 is not available, or 0 For use, 1 is not available, where J can be selected as 40, 80, 120, 160, 240.

The system module is configured to transmit a system message at a preset resource location by:

The preset resource location includes: the physical broadcast channel is located on a last Y OFDM symbols of a first slot of a subframe and a first X OFDM symbols of a second slot.

The X includes: 4, 5, 6, and 7, and the Y includes 0, 1, 2, 3, 4, 5.

or,

The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R optionally includes 4, 5, 6, 8, and the predefined OFDM symbols include: each time The second OFDM symbol of the slot, the fourth OFDM symbol of the inverse of each slot, the last two OFDM symbols of each slot, and the third OFDM symbol of each slot.

Optionally, when R is 6, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of the second slot, and a second slot Two OFDM symbols; or, the first predefined OFDM symbol includes a last two OFDM symbols of each slot and a fourth OFDM symbol of each slot; or the first predefined OFDM symbol includes each The last two OFDM symbols of the time slot and the second OFDM symbol of the second time slot, and the third OFDM symbol of the second time slot;

The initial position of the antenna port of the narrowband reference signal is determined according to the cell identity.

The physical broadcast channel and the synchronization channel are located on adjacent subframes.

The physical broadcast channel and the synchronization channel are located on adjacent subframes including one of the following:

The preset resource location includes: the physical broadcast channel is mapped to T radio frames, and the subframe position of each radio frame is the same.

The subframe includes one or more of the following: subframe #0 of the radio frame, subframe #4 of the radio frame, subframe #5 of the radio frame, or subframe #9 of the radio frame.

The physical broadcast channel of the system module is transmitted once in Z1 radio frames, and is transmitted Z3 times every Z1*Z2 radio frames.

The Z1 includes 4, 6, 8, 12, 24, and Z2 includes 4, 6, 8, 12, 16.

Transmitting the system message through a physical shared channel at a preset resource location, or at a preset The system message is transmitted over the physical shared channel and the physical broadcast channel at the resource location.

Transmitting the system message through the physical shared channel on the preset resource location includes:

The physical shared channel, the synchronization channel, and the physical broadcast channel of the bearer system message are located in different subframes.

The physical shared channel subframe of the bearer system message includes one or more subframes of subframe #0, subframe #4, subframe #5, and subframe #9.

Example 1

The initial OFDM symbol information includes two or four states;

Including: 1 bit represents the physical downlink channel available resource information.

Predefining two resource mapping modes, indicating, by using 1-bit signaling, the available resource information of the physical downlink channel according to the signaling:

For example, the first mapping mode includes: the physical downlink channel is mapped from the first OFDM symbol of the subframe, and/or the corresponding available resource unit is the remaining resources after removing the fixed single port virtual cell-specific reference signal; the second mapping mode includes : the physical downlink channel is mapped from the fourth OFDM symbol of the subframe, and/or the corresponding available resource unit is the remaining resources after removing the fixed four port virtual cell-specific reference signals;

or,

The first mapping mode includes: the physical downlink channel is mapped from the first OFDM symbol of the subframe, and the corresponding available resource unit is the remaining resource after removing the fixed single port virtual cell-specific reference signal; the second mapping mode includes: the physical downlink channel is The fifth OFDM symbol of the subframe starts to be mapped, and the available resource unit is the remaining resources after removing the fixed four-port virtual cell-specific reference signal;

Another manner: defining signaling for starting physical OFDM symbol information in one subframe and resource unit information that can be used in one subframe of the physical downlink channel, respectively, for the physical downlink channel;

The physical downlink channel starts with 1 bit of OFDM symbol information in one subframe, including One OFDM symbol, kth OFDM symbol information, k may be selected as 3, 4, 5; or, the physical downlink channel starts with 2 bits of OFDM symbol information in one subframe, including 1, 2, 3, and 4 OFDM symbols;

The resource unit information that can be used by the physical downlink channel in one subframe is indicated by a cell-specific reference signal port location and/or a channel state information reference signal port location; wherein the cell-specific reference signal port location includes 1, 2 4, or, the cell-specific reference signal port location includes 1, 4;

The channel state information reference signal port location includes none, and a specific one or more of the CSI-RS resource configuration indexes in the related LTE system are selected. The channel state information reference signal port position is no indication that no channel state information reference signal is transmitted.

Example 2

Since the CRS on the MBSFN (Multicast Broadcast Multicast Network) network is only located in the first two OFDM symbols, the PBCH needs to be demodulated through the CRS and/or the synchronization channel. Therefore, the PBCH is located. Non-MBSFN subframes (0, 4, 5, 9);

If the synchronization signal is located on the MBSFN subframe, the impact of the CRS of the LTE system on the synchronization signal can be avoided, but this will limit the transmission of the multicast service, and therefore, the synchronization signal is located in the MBSFN subframe (1, 2, 3, 6, 7, 8) The upper and the synchronization signals are not located on the MBSFN subframes (0, 4, 5, 9). The two scenarios give a mapping scheme of the PBCH, and the mapping scheme includes: performing physical broadcast on the preset resource location. The system transmits the system message.

The X includes: 4, 5, 6, and 7, and the Y includes 0, 1, 2, 3, 4, 5.

or,

The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R optionally includes 4, 5, 6, 8, and the predefined OFDM symbols include: each time The second OFDM symbol of the slot, the fourth OFDM symbol of the reciprocal of each slot, each The last two OFDM symbols of each slot, the third OFDM symbol of each slot.

It should be noted that the above description indicates that the physical broadcast channel is located on a different adjacent subframe of the synchronization channel, but there is no limitation that there must be a physical broadcast channel in the adjacent subframe of the synchronization channel, and the number of subframes occupied by the synchronization channel may be greater than Or equal to the number of subframes occupied by the physical broadcast channel;

For example, the primary synchronization signal is located on the subframe #k of the odd radio frame, and the secondary synchronization signal is located on the subframe #k of the even radio frame, where k is optional: 1, 2, 3, 6, 7, 8, or The primary synchronization signal is located on the subframe #k of the even radio frame, and the secondary synchronization signal is located on the subframe #k of the odd radio frame, where k is selectable: 1, 2, 3, 4, 6, 7, 8; Subframes are numbered starting from 0; or,

The primary synchronization signal is located on subframe #k of the odd radio frame, and the secondary synchronization signal is located on subframe #k of the even radio frame, where k is optional: 0, 4, 5, 9, or The primary synchronization signal is located on subframe #k of the even radio frame, and the secondary synchronization signal is located on subframe #k of the odd radio frame, where k is selectable: 0, 4, 5, 9; wherein the subframe is from 0 Start numbering;

The physical broadcast channel is mapped in cycles of 6 consecutive radio frames, and is mapped to subframe #k, k of each radio frame: 0, 4, 5, 9; or, the physical broadcast channel is 6 consecutive radio frames. The period mapping is on the subframe #k of the first 3 radio frames of each period, k is selectable: 0, 4, 5, 9, or the physical broadcast channel is mapped in 8 consecutive radio frames, and each antenna is mapped. Subframes of the frame #k,k are optional: 0, 4, 5, 9.

Example 3

Transmission includes: transmission and/or reception;

The sending process includes: the NB-LTE base station sends a system message to the NB-LTE terminal, and the NB-LTE base station sends the physical downlink channel to the NB-LTE terminal according to the system message;

The NB-LTE base station sends a system message to the NB-LTE terminal at a preset resource location;

The NB-LTE base station sends a physical downlink channel to the NB-LTE terminal according to the system message, where the system message includes at least one of the following: the frequency domain location information of the system, the configuration information of the physical shared channel carrying the system message, and the terminal. Access configuration information, the physical downlink channel available resource information, and radio frame information.

NB-LTE frequency domain location information is mainly used for CRS sequence generation; wherein the CRS sequence along Using the LTE system CRS sequence generation method, therefore, it is necessary to determine the frequency domain location corresponding to NB-LTE to generate a CRS sequence;

The physical shared channel configuration information of the bearer system message includes at least one of: a number of bits of the physical shared channel carrying system information, a number of subframes occupied by the physical shared channel, and radio frame information occupied by the physical shared channel;

The terminal access configuration information includes: whether to allow terminal access, and/or system status information, and/or terminal uplink access resource configuration information;

The system status information is used by the terminal to determine whether to access the system, and/or how to access the system.

The physical downlink channel available resource information includes: the physical downlink channel starts Orthogonal Frequency Division Multiplexing (OFDM) symbol information in one subframe, and/or the physical downlink channel does not use resources in one subframe. Unit information, and/or subframe information usable by the physical downlink channel.

The resource unit information is indicated by a cell-specific reference signal CRS port location and/or channel state information reference signal CSI-RS port location; the cell-specific reference signal port location and/or channel state information reference signal port location indication is The number of ports and/or virtual cell identity is determined.

Transmitting the system message on the preset resource location includes transmitting the system message over a physical broadcast channel at a preset resource location.

The X includes: 4, 5, 6, and 7, and the Y includes 0, 1, 2, 3, 4, 5.

The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R is optional 4, 5, 6, 8, and the predefined OFDM symbols include: The second OFDM symbol of the time slot, the fourth OFDM symbol of the last of each time slot, the last two OFDM symbols of each time slot, and the third OFDM symbol of each time slot.

The preset resource location includes: the physical broadcast channel is mapped to T radio frames, and The subframe position located in each radio frame is the same.

The physical broadcast channel is transmitted once in Z1 radio frames, and is transmitted Z3 times per Z1*Z2 radio frames.

The Z1 includes 4, 6, 8, 12, 24, and Z2 includes 4, 6, 8, 12, 16.

The transmission of system messages on a preset resource location includes:

The receiving process includes: receiving, by the NB-LTE terminal, a system message sent by the NB-LTE base station, where the NB-LTE terminal receives the physical downlink channel according to the system message.

The system message includes at least one of the following: the frequency domain location information of the system, the configuration information of the physical shared channel carrying the system message, the configuration information of the terminal access, the available resource information of the physical downlink channel, and the radio frame information.

The subframe information indication that can be used by the physical downlink channel includes: periodically indicating an available subframe by using a bitmap, or periodically indicating whether to use a bitmap. The available subframes, for example, use J bits to indicate whether each subframe in the period of J subframes can be used, and each bit corresponds to one subframe usage in J subframe periods, 1 is usable, 0 is Can not be used, or 0 is available, 1 is not available, where J can be selected as 40, 80, 120, 160, 240.

The X includes: 4, 5, 6, and 7, and the Y includes 0, 1, 2, 3, 4, 5.

The physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R is optional 4, 5, 6, 8, and the predefined OFDM symbols include: each time slot The second OFDM symbol, the last fourth OFDM symbol of each slot, the last two OFDM symbols of each slot, and the third OFDM symbol per slot.

The Z1 includes 4, 6, 8, 12, 24, and Z2 includes 4, 6, 8, 12, 16.

The transmission of system messages on a preset resource location includes:

The physical shared channel, the synchronization channel, and the physical broadcast channel of the bearer system message are located differently On the sub-frame.

Example 4

The system message includes: the physical downlink channel available resource information and radio frame information, and is carried by a physical broadcast channel.

Predefining two resource mapping modes, indicating, by using 1-bit signaling, the available resource information of the physical downlink channel according to the signaling;

The physical downlink channel available resource information includes the start OFDM symbol information of the physical downlink channel in one subframe and the resource unit information that the physical downlink channel can use in one subframe;

The first mapping mode includes: the physical downlink channel is mapped from the first OFDM symbol of the subframe, and the corresponding available resource unit is a remaining resource after removing the fixed single port virtual cell-specific reference signal;

The second mapping mode includes: the physical downlink channel is mapped from the fourth OFDM symbol of the subframe, and the corresponding available resource unit is a remaining resource after removing the fixed four port virtual cell-specific reference signal;

The synchronization channel is located in subframe #9, the physical broadcast channel is located in subframe #0 of the radio frame; or the physical broadcast channel is located in subframe #9, and the synchronization channel is located in subframe #0 of the radio frame; or, the synchronization channel Located in subframe #4, the physical broadcast channel is located in subframe #5 of the radio frame; or, the synchronization channel is located in subframe #5, the physical broadcast channel is located in subframe #4 of the radio frame;

The physical broadcast channel is located on the last Y OFDM symbols of the first slot of one subframe and the first X OFDM symbols of the second slot, X is selectable 4, 5, 6, 7, Y is selectable 0 1, 2, 3, 4, 5;

The physical broadcast channel is transmitted once in Z1 radio frames, and Z3 times are transmitted repeatedly every Z1*Z2 radio frames, Z1 is selectable 6, 8, 12, 24, and Z2 is optional 4, 6, 8, 12, 16;

For example, the first 4 or 5 OFDM symbols of the second slot of the subframe, or the last OFDM symbol of the first slot of the subframe and the first 4 OFDM symbols of the second slot, or The last 2 OFDM symbols of the first slot of the subframe and the first 4 OFDM symbols of the second slot, or The last 2 OFDM symbols of the first slot of the subframe and the first 6 OFDM symbols of the second slot, or the last 3 OFDM symbols of the first slot of the subframe and the first 5 of the second slot OFDM symbols, or the last 5 OFDM symbols of the first slot of the subframe and the first 7 OFDM symbols of the second slot, or the last 3 OFDM symbols and the first slot of the first slot of the subframe All OFDM symbols of two time slots;

The upper mapping can reduce the number of subframes mapped by the PBCH, reduce the transmission delay, and adopt a unified design scheme for different cyclic prefix types.

The physical broadcast channel is mapped to 6 consecutive radio frames, and the fixed subframes #Y1 and Y1 of each radio frame are selectable one or more of 0, 4, 5, and 9; and 24 radio frames are used. Cycle, 4 times per cycle;

Alternatively, the physical broadcast channel is mapped to the first 3 consecutive radio frames of every 6 radio frames, and the fixed subframe #Y1, Y1 located in each radio frame may be selected as one of 0, 4, 5, 9 or Multiple; 24 radio frames, 4 times per cycle.

Alternatively, the physical broadcast channel is mapped to 8 consecutive radio frames, and the fixed subframes #Y1, Y1 located in each radio frame are selectable one or more of 0, 4, 5, 9; The frame is a period and is transmitted 8 times in each period;

Alternatively, the physical broadcast channel is mapped to 8 consecutive radio frames, and the fixed subframe #Y1, Y1 located in each radio frame may be one or more of 0, 4, 5, 9; 48 wireless The frame is a period and is transmitted 6 times in each period;

Alternatively, the physical broadcast channel is mapped to 8 consecutive radio frames, and the fixed subframes #Y1, Y1 located in each radio frame are selectable one or more of 0, 4, 5, 9; The frame is a period and is transmitted 12 times per cycle.

Example 5

The system message includes: the frequency domain location information of the system, the configuration information of the physical shared channel carrying the system message, the configuration information of the terminal access, and the radio frame information, which are carried by the physical broadcast channel.

The synchronization channel is located in subframe #8, and the physical broadcast channel is located in subframe #9 of the radio frame; or The synchronization channel is located in subframe #6, the physical broadcast channel is located in subframe #5 of the radio frame; or the synchronization channel is located in subframe #3, the physical broadcast channel is located in subframe #4 of the radio frame; the synchronization channel is located in subframe Frame #1, the physical broadcast channel is located in subframe #0 of the radio frame;

For example, the first 4 or 5 OFDM symbols of the second slot of the subframe, or the last OFDM symbol of the first slot of the subframe and the first 4 OFDM symbols of the second slot, or The last 2 OFDM symbols of the first slot of the subframe and the first 4 OFDM symbols of the second slot, or the last 2 OFDM symbols of the first slot of the subframe and the first 6 of the second slot OFDM symbols, or the last 3 OFDM symbols of the first slot of the subframe and the first 5 OFDM symbols of the second slot, or the last 5 OFDM symbols and the second of the first slot of the subframe The first 7 OFDM symbols of the time slot, or the last 3 OFDM symbols of the first time slot of the subframe and all the OFDM symbols of the second time slot;

The above mapping can reduce the number of subframes mapped by the PBCH, reduce the transmission delay, and adopt a unified design scheme for different cyclic prefix types.

Example 6

The system message includes: the physical downlink channel available resource information and the radio frame information, the frequency domain location information of the system, the configuration information of the physical shared channel carrying the system message, and the terminal access. Configuration information;

The radio frame information, the NB-LTE frequency domain location information, and the configuration information of the physical shared channel carrying the system message are carried by the physical broadcast channel.

The synchronization channel is located in subframe #8, the physical broadcast channel is located in subframe #9 of the radio frame; or the synchronization channel is located in subframe #6, the physical broadcast channel is located in subframe #5 of the radio frame; or, the synchronization channel Located in subframe #3, the physical broadcast channel is located in subframe #4 of the radio frame; the synchronization channel is located in subframe #1, the physical broadcast channel is located in subframe #0 of the radio frame;

or,

The physical broadcast channel is mapped to the first three consecutive radio frames of every six radio frames, and one or more of the fixed subframes #Y1 and Y1 of each radio frame are selectable from 0, 4, 5, and 9. ; with 24 wireless The frame is a period and is transmitted 4 times in each period;

The physical downlink channel available resource information and the terminal access configuration information are carried by the physical shared channel. The physical shared channel carrying the system message starts with an OFDM symbol in a subframe as a first OFDM symbol, and the available resource unit is a remaining resource after removing the 4-port virtual cell-specific reference signal port, where the physical downlink is shared. The channel is transmitted in a single port mode;

Defining signaling for the physical downlink channel starting OFDM symbol information in one subframe and resource unit information that the physical downlink channel can use in one subframe, respectively;

The physical downlink channel starts with 1 bit of OFDM symbol information in one subframe, including a first OFDM symbol, a kth OFDM symbol information, and k is optional 3, 4, 5; or, the physical downlink channel is The starting OFDM symbol information in one subframe is 2 bits, including the first, second, third, and fourth OFDM symbols;

The resource unit information that can be used by the physical downlink channel in one subframe is indicated by a cell-specific reference signal port location and/or a channel state information reference signal port location;

The cell-specific reference signal port location includes 1, 2, 4, or the cell-specific reference signal port location includes 1, 4; the channel state information reference signal port location includes none, and the CSI-RS resource configuration index in the related LTE system. Select a specific one or more;

The physical downlink channel includes: a physical downlink shared channel and/or a physical downlink control channel.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the method described in the foregoing embodiments.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. The invention is not limited to any specific form of combination of hardware and software.

The embodiments disclosed in the present invention are as described above, but the contents thereof are only for the purpose of facilitating understanding of the technical solutions of the present invention, and are not intended to limit the present invention. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the scope of the present invention. It is subject to the scope defined by the appended claims.

Industrial applicability

The above technical solution can reduce the mutual interference between signals in the spectrum sharing of different systems, reduce the situation that different systems transmit different signals simultaneously on the same resource, ensure the understanding between the system and the terminal, and improve the data transmission performance.

Claims

A system message transmission method includes:

Transmitting system messages on preset resource locations;

Transmitting a physical downlink channel according to the system message, where the system message includes at least one of: frequency domain location information of the system, configuration information of a physical shared channel carrying a system message, configuration information of the terminal access, and the physical Downstream channel available resource information, radio frame information.
The method of claim 1, wherein: the physical downlink channel available resource information comprises: the physical downlink channel starting orthogonal frequency division multiplexing OFDM symbol information in one subframe, and/or the physical The resource unit information that the downlink channel does not use in one subframe, and/or the subframe information that can be used by the physical downlink channel.
The method of claim 2 further comprising:

The resource unit information is indicated by a cell-specific reference signal CRS port location and/or channel state information reference signal CSI-RS port location; the cell-specific reference signal port location and/or channel state information reference signal port location indication is The number of ports and/or virtual cell identity is determined.
The method of claim 1 wherein transmitting the system message at the predetermined resource location comprises:

The system message is transmitted over a physical broadcast channel at a preset resource location.
The method of claim 4, wherein the preset resource location comprises: the physical broadcast channel is located in a last Y orthogonal frequency division multiplexing OFDM symbols of a first time slot of a subframe and a second On the first X OFDM symbols of the time slot, or the physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R includes 4, 5, 6, and 8, The predefined OFDM symbols include: a second OFDM symbol per slot, a third OFDM symbol per slot, a fourth OFDM symbol in the last of each slot, and the last two OFDM symbols of each slot.
The method of claim 5, wherein said X comprises: 4, 5, 6, 7 and said Y comprises 0, 1, 2, 3, 4, 5.
The method of claim 5 wherein the first predefined OFDM symbol comprises one of:

When R is 4, the first predefined OFDM symbol includes the last two OFDM symbols of each slot;

When R is 5, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of a second slot, or the first predefined OFDM symbol includes each The last two OFDM symbols of the time slot and the third OFDM symbol of the second time slot;

When R is 6, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of a second slot, and a second OFDM symbol of a second slot Or the first predefined OFDM symbol includes a last two OFDM symbols of each slot and a fourth OFDM symbol of each slot; or the first predefined OFDM symbol includes each slot a second OFDM symbol and a second OFDM symbol of the second slot, and a third OFDM symbol of the second slot;

When R is 8, the first predefined OFDM symbol includes the second and third OFDM symbols of each slot, and the last two OFDM symbols.
The method of claim 4 wherein said physical broadcast channel and synchronization channel are located on adjacent subframes.
The method of claim 8 wherein: said physical broadcast channel and synchronization channel are located on adjacent subframes including one of:

The synchronization channel is located in subframe #9, and the physical broadcast channel is located in subframe #0;

The synchronization channel is located in subframe #0, and the physical broadcast channel is located in subframe #9;

The synchronization channel is located in subframe #8, and the physical broadcast channel is located in subframe #9;

The synchronization channel is located in subframe #6, and the physical broadcast channel is located in subframe #5;

The synchronization channel is located in subframe #4, and the physical broadcast channel is located in subframe #5;

The synchronization channel is located in subframe #5, and the physical broadcast channel is located in subframe #4;

The synchronization channel is located in subframe #3, and the physical broadcast channel is located in subframe #4;

The synchronization channel is located in subframe #1, and the physical broadcast channel is located in subframe #0.
The method of claim 4 wherein said predetermined resource location comprises: said The physical broadcast channel is mapped to T radio frames, and the subframe positions of each radio frame are the same, and T includes: 3, 6, 9, 18, 36.
The method of claim 10 wherein said subframe comprises one or more of the following:

Subframe #0 of the radio frame, subframe #4 of the radio frame, subframe #5 of the radio frame, or subframe #9 of the radio frame.
The method of claim 4, wherein the physical broadcast channel is transmitted once in Z1 radio frames, and is transmitted Z3 times per Z1*Z2 radio frames.
The method of claim 12 wherein said Z1 comprises 4, 6, 8, 12, 24 and Z2 comprises 4, 6, 8, 12, 16.
The method of claim 4, 8, 9, 10, 11 or 12, wherein said physical broadcast channel is demodulated using a narrowband reference signal, said narrowband reference signal being transmitted on a subframe transmitting said physical broadcast channel The narrowband reference signal is transmitted on a second predefined Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the second predefined OFDM symbol comprises: a last two OFDM symbols of each time slot in the subframe, or Transmitting each OFDM symbol of the physical broadcast channel.
The method of claim 1 wherein transmitting the system message at the predetermined resource location comprises:

The system message is transmitted over a physical shared channel at a preset resource location, or transmitted over a physical shared channel and a physical broadcast channel at a predetermined resource location.
The method of claim 15 wherein transmitting the system message over a physical shared channel at a predetermined resource location comprises:

The physical shared channel carrying the system message starts with an orthogonal frequency division multiplexing OFDM symbol in a subframe, and the corresponding available resource unit is a remaining resource after removing the fixed virtual cell specific reference signal port.
The method of claim 15 wherein the physical shared channel, the synchronization channel, and the physical broadcast channel of the bearer system message are located on different subframes.
The method of claim 17, wherein the physical shared channel subframe of the bearer system message comprises one or more subframes of subframe #0, subframe #4, subframe #5, subframe #9.
The method of claim 1 wherein

The configuration information of the physical shared channel carrying the system message includes at least one of the following:

The physical shared channel carries the number of bits of system information;

The number of subframes occupied by the physical shared channel;

Radio frame information occupied by the physical shared channel;

The configuration information of terminal access includes:

Whether to allow terminal access, and/or system status information, and/or terminal uplink access resource configuration information; the system status information is used by the terminal to determine whether to access the system, and/or how to access the system.
A system message transmission device comprising:

a system module configured to transmit a system message on a preset resource location;

a channel module, configured to transmit a physical downlink channel according to the system message, where the system message includes at least one of: frequency domain location information of the system, configuration information of a physical shared channel carrying a system message, and configuration of a terminal access Information, physical downlink channel available resource information, and radio frame information.
The apparatus according to claim 20, wherein said physical downlink channel available resource information comprises: said physical downlink channel initiating orthogonal frequency division multiplexing OFDM symbol information in one subframe, and/or said physical Resource unit information not used by the downlink channel in one subframe, and/or subframe information usable by the physical downlink channel;

The device also includes:

An indication module configured to indicate the resource unit information with a cell-specific reference signal CRS port location and/or a channel state information reference signal CSI-RS port location; the cell-specific reference signal port location and/or channel state information reference The signal port location indication is determined by the number of ports, and/or the virtual cell identity.
The apparatus of claim 20 wherein said system module is configured to transmit a system message at a predetermined resource location by:

The system message is transmitted over a physical broadcast channel at a preset resource location.
The apparatus according to claim 22, wherein said predetermined resource location comprises: said physical broadcast channel is located in a last Y orthogonal frequency division multiplexing OFDM symbols of a first time slot of a subframe On the first X OFDM symbols of the second time slot, or the physical broadcast channel is located on any R OFDM symbols in the first predefined OFDM symbol in the subframe, where R includes 4, 5, 6, 8 The predefined OFDM symbol includes: a second OFDM symbol of each slot, a fourth OFDM symbol of each slot, a last two OFDM symbols of each slot, and a third of each slot OFDM symbol.
The apparatus of claim 23, wherein said X comprises: 4, 5, 6, 7 and said Y comprises 0, 1, 2, 3, 4, 5.
The apparatus of claim 23 wherein the first predefined OFDM symbol comprises one of:

When R is 4, the first predefined OFDM symbol includes the last two OFDM symbols of each slot;

When R is 5, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of a second slot, or the first predefined OFDM symbol includes each The last two OFDM symbols of the time slot and the third OFDM symbol of the second time slot;

When R is 6, the first predefined OFDM symbol includes a last OFDM symbol of each slot and a fourth OFDM symbol of a second slot, and a second OFDM symbol of a second slot Or the first predefined OFDM symbol includes a last two OFDM symbols of each slot and a fourth OFDM symbol of each slot; or the first predefined OFDM symbol includes each slot a second OFDM symbol and a second OFDM symbol of the second slot, and a third OFDM symbol of the second slot;

When R is 8, the first predefined OFDM symbol includes the second and third OFDM symbols of each slot, and the last two OFDM symbols.
The apparatus of claim 22 wherein said physical broadcast channel and synchronization channel are located on adjacent subframes.
The apparatus of claim 26, wherein the physical broadcast channel and the synchronization channel are located on adjacent subframes including one of the following:

The synchronization channel is located in subframe #9, and the physical broadcast channel is located in subframe #0;

The synchronization channel is located in subframe #0, and the physical broadcast channel is located in subframe #9;

The synchronization channel is located in subframe #8, and the physical broadcast channel is located in subframe #9;

The synchronization channel is located in subframe #6, and the physical broadcast channel is located in subframe #5;

The synchronization channel is located in subframe #4, and the physical broadcast channel is located in subframe #5;

The synchronization channel is located in subframe #5, and the physical broadcast channel is located in subframe #4;

The synchronization channel is located in subframe #3, and the physical broadcast channel is located in subframe #4;

The synchronization channel is located in subframe #1, and the physical broadcast channel is located in subframe #0.
The device of claim 22, wherein the preset resource location comprises: the physical broadcast channel is mapped to T radio frames, and the subframe position of each radio frame is the same, and T includes: 6, 9, 18, 36.
The apparatus of claim 28, wherein the subframe comprises one or more of the following: a subframe #0 of a radio frame, a subframe #4 of a radio frame, a subframe #5 of a radio frame, or a radio frame Subframe #9.
The apparatus of claim 22, wherein said physical broadcast channel of said system module is transmitted once in Z1 radio frames, and Z2 times are transmitted every Z1*Z2 radio frames.
The method of claim 30 wherein said Z1 comprises 4, 6, 8, 12, 24 and Z2 comprises 4, 6, 8, 12, 16.
The apparatus of claim 22, 26, 27, 28, 29 or 30, wherein said physical broadcast channel is demodulated using a narrowband reference signal, said narrowband reference signal being transmitted on a subframe transmitting said physical broadcast channel The narrowband reference signal is transmitted on a second predefined Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the second predefined OFDM symbol comprises: a last two OFDM symbols of each time slot in the subframe, or Transmitting each OFDM symbol of the physical broadcast channel.
The apparatus of claim 20 wherein said system module is configured to transmit a system message at a predetermined resource location by:

The system message is transmitted over a physical shared channel at a preset resource location, or transmitted over a physical shared channel and a physical broadcast channel at a predetermined resource location.
The apparatus of claim 33, wherein the system module is configured to transmit the system message over a physical shared channel at a predetermined resource location by:

The physical shared channel carrying the system message starts with an orthogonal frequency division multiplexing OFDM symbol in a subframe, and the corresponding available resource unit is a remaining resource after removing the fixed virtual cell specific reference signal port.
The apparatus of claim 33, wherein the physical shared channel, the synchronization channel, and the physical broadcast channel of the bearer system message are located on different subframes.
The apparatus of claim 35, wherein the physical shared channel subframe of the bearer system message comprises one or more subframes of subframe #0, subframe #4, subframe #5, subframe #9.
The device of claim 20, wherein

The configuration information of the physical shared channel carrying the system message includes at least one of the following:

The physical shared channel carries the number of bits of system information;

The number of subframes occupied by the physical shared channel;

Radio frame information occupied by the physical shared channel;

The configuration information of terminal access includes:

Whether to allow terminal access, and/or system status information, and/or terminal uplink access resource configuration information; the system status information is used by the terminal to determine whether to access the system, and/or how to access the system.