CN115397006A

CN115397006A - Narrowband Internet of things access method and user equipment

Info

Publication number: CN115397006A
Application number: CN202211059121.4A
Authority: CN
Inventors: 苏笛; 孙霏菲
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2017-04-10
Filing date: 2018-02-11
Publication date: 2022-11-25
Also published as: WO2018190620A1

Abstract

The invention discloses a narrowband Internet of things access method, which comprises the following steps: detecting a main synchronizing signal and an auxiliary synchronizing signal to realize downlink synchronization; detecting a physical broadcast channel to acquire main message block information; acquiring first type system message block information according to the main message block information; wherein at least one of the primary synchronization signal, the secondary synchronization signal, the primary message block, and the first type of system message block is transmitted on a non-anchor carrier. Compared with the prior art, the invention expands the frequency domain transmission resources of the main synchronization signal, the auxiliary synchronization signal, the main message block and the first type of system message block from the anchor carrier to the non-anchor carrier, greatly reduces the load of the anchor carrier and ensures that the existing NBIoT is applied to the working mode of time division duplex. In addition, the invention also discloses user equipment for accessing the narrowband Internet of things.

Description

Narrowband Internet of things access method and user equipment

The application is a divisional application of an invention patent with the application number of 201810142604.8 and the name of a narrow-band Internet of things access method and user equipment.

Technical Field

The invention relates to the technical field of wireless communication, in particular to a narrowband Internet of things access method and user equipment.

Background

The narrowband internet of things (NBIoT) technology defines wireless access of a cellular internet of things, is based on non-backward compatible E-UTRA to a great extent, enhances an extreme coverage scenario, supports massive low-rate terminals of the internet of things, and has low delay sensitivity, ultra-low cost and power consumption equipment and an optimized network architecture. The narrowband Internet of things system supports three deployment modes (operationmodes) in total: (1) Stand-alone deployment mode (Stand-alone), replating to spectrum occupied by GERAN systems, using one or more GSM carriers; (2) An in-band deployment mode (in-band), deployed within an LTE bandwidth, using one or more physical resource blocks of LTE; (3) Guard-band deployment mode (guard-band), deployed within the guard bandwidth of LTE systems, uses one or more 200kHz white space resources.

The existing narrowband internet of things technologies of the releases R13 and R14 only support a Frequency Division Duplex (FDD) mode and do not support a Time Division Duplex (TDD) mode. In a frequency division duplex scene, anchor carriers are paired uplink and downlink frequency points, and a wireless frame is provided with more continuous and sufficient uplink and downlink subframes. When a time division duplex scene is considered, the same frequency point is used for the uplink and the downlink of an anchor carrier, a subframe in a radio frame distinguishes uplink, downlink or special subframes, and a main synchronization signal, a broadcast channel and a sending subframe of a first type system message block (SIB 1-NB) are fixed by a protocol in the existing system design, so the existing design cannot be directly reused in the time division duplex scene. For example, the existing SIB1-NB is fixed by a protocol on the subframe 4 to be transmitted, and the design of the in-band deployed time division duplex narrowband internet of things needs to comply with the uplink and downlink subframe configuration of the LTE system, so the subframe 4 is not necessarily a downlink subframe, and an uplink and downlink subframe configuration table of the LTE system is given in table 1. In addition, the load of sending common signaling by the uplink and the downlink of the existing anchor carrier is heavier, and the following behavior examples are that main and auxiliary synchronous signals, broadcast channels, system messages, common signaling and control channels can only be sent on the anchor carrier, and because the bandwidth of the narrowband internet of things system is limited, the downlink does not support frequency division multiplexing between physical channels or between multiple users, all the physical channels are sent on different subframes in a time division multiplexing mode, and the number of downlink subframes of one wireless frame of time division duplex is limited, so the existing system design can not meet the transmission requirement and can not be suitable for a time division duplex scene.

Table 1LTE system uplink and downlink subframe configuration table

In view of this, it is necessary to provide a narrowband internet of things access method and user equipment capable of solving the above technical problems.

Disclosure of Invention

The invention aims to: the method overcomes the defects of the prior art, and provides a narrowband Internet of things access method and user equipment which can adapt to a time division duplex mode.

In order to achieve the above object, the present invention provides a narrowband internet of things access method, which includes the following steps:

detecting a main synchronizing signal and an auxiliary synchronizing signal to realize downlink synchronization;

detecting a physical broadcast channel to acquire main message block information;

acquiring first-class system message block information according to the main message block information;

wherein at least one of the primary synchronization signal, the secondary synchronization signal, the primary message block, and the first type of system message block is transmitted on a non-anchor carrier.

Preferably, after the step of obtaining the first type system message block information according to the main message block information, the method includes: and acquiring information of other system message blocks according to the information of the first type of system message blocks and/or the information of the main message block, wherein the other system message blocks comprise a plurality of system message blocks except the first type of system message blocks, and at least one system message block in the other system message blocks is transmitted on an anchor carrier or a non-anchor carrier.

Preferably, ,

the detecting the primary synchronization signal and the secondary synchronization signal to realize downlink synchronization includes: detecting a main synchronizing signal and an auxiliary synchronizing signal to realize downlink synchronization, and determining a system duplex mode according to physical resources used by the main synchronizing signal and/or the auxiliary synchronizing signal;

the detecting the physical broadcast channel to obtain the main message block information includes: and detecting a physical broadcast channel on corresponding time domain and/or frequency domain resources according to the determined system duplex mode to acquire the main message block information.

Preferably, the physical resources include at least one of time domain resources, frequency domain resources, and sequence resources.

Preferably, the detecting a physical broadcast channel on a corresponding frequency domain resource according to the determined system duplex mode to obtain the primary message block information includes: if the determined system duplex mode is frequency division duplex, detecting a physical broadcast channel on an anchor carrier to acquire main message block information; and if the determined system duplex mode is time division duplex, detecting a physical broadcast channel on the non-anchor carrier wave to acquire the main message block information.

Preferably, the acquiring the first type system message block information according to the main message block information includes: and acquiring first-class system message block information according to the first-class system message block resource allocation information contained in the main message block.

Preferably, ,

the first type system message block resource allocation information comprises: position information of one or more subframes for transmitting the first type of system message block and/or position information of one or more carriers for transmitting the first type of system message block;

or

The first type system message block resource allocation information comprises offset of a starting carrier relative to an anchor carrier, a starting carrier sequence number, the number of carriers and carrier spacing.

Preferably, the acquiring information of other system message blocks according to the information of the first type of system message blocks and/or the information of the main message block includes: and acquiring corresponding other system message block information according to other system message block resource allocation information contained in the first type of system message block and/or according to system messages contained in the main message block and related to the resource allocation of other message blocks.

Preferably, the first and second electrodes are formed of a metal,

the other system message block resource allocation information includes: location information for one or more subframes used to transmit other system message blocks, and/or location information for one or more carriers used to transmit other system message blocks;

or

The resource allocation information of the other system message blocks comprises the offset of the initial carrier relative to the anchor carrier, the sequence number of the initial carrier, the number of the carriers and the space between the carriers.

Preferably, ,

and the system message related to the resource allocation of other message blocks is an uplink and downlink subframe configuration message.

In order to achieve the above object, the present invention further provides a user equipment for narrowband internet of things access, including:

the downlink synchronization module is used for detecting the main synchronization signal and the auxiliary synchronization signal to realize downlink synchronization;

a main message acquisition module for detecting a physical broadcast channel to acquire main message block information;

the system message acquisition module is used for acquiring first-class system message block information according to the main message block information;

In order to achieve the above object, the present invention further provides a narrowband internet of things access configuration method, which includes the following steps:

transmitting a main synchronization signal and an auxiliary synchronization signal to realize downlink synchronization;

transmitting a primary message block on a physical broadcast channel to configure system basic transmission parameters;

sending a first type of system message block to configure other system basic transmission parameters;

In order to achieve the above object, the present invention further provides a base station device for narrowband internet of things access configuration, which includes:

the downlink synchronization module is used for sending a main synchronization signal and an auxiliary synchronization signal to realize downlink synchronization;

a main message configuration module, configured to send a main message block in a physical broadcast channel to configure basic transmission parameters of a system;

the system message configuration module is used for sending a first type of system message block to configure other system basic transmission parameters;

Compared with the prior art, the invention has the technical effects that: the frequency domain transmission resources of the main synchronization signal, the auxiliary synchronization signal, the main message block and the first-class system message block are expanded from the anchor carrier to the non-anchor carrier, so that the load of the anchor carrier is greatly reduced, the existing NBIoT is applied to a time division duplex working mode, higher spectrum resource utilization rate is obtained, and the system throughput and connection efficiency of the NBIoT system in a massive user connection scene are remarkably improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a flowchart of a narrowband internet of things access method of the present invention;

fig. 2 is a flowchart of a narrowband internet of things access scheme according to an embodiment of the present invention;

FIG. 3 is a diagram of the primary and secondary synchronization signals and physical broadcast channels transmitted by the anchor carrier configured according to the present invention;

FIG. 4 is a schematic diagram of implicitly indicating resource allocation of a first type of system message block according to the present invention;

fig. 5 is a flowchart of a narrowband internet of things access scheme according to a second embodiment of the present invention;

FIG. 6 is a diagram illustrating the determination of the locations of multiple carriers for physical channel hopping according to the rules of the present invention;

FIG. 7 is a diagram illustrating a first type of system message block resource determination according to carrier configuration information;

fig. 8 is a diagram illustrating a frequency hopping transmission pattern of a downlink physical channel over multiple carriers according to the present invention;

fig. 9 is a schematic diagram illustrating a UE determining a system duplexing mode according to a secondary synchronization signal;

FIG. 10 is a diagram illustrating another UE determining the duplexing mode of the system according to the secondary synchronization signal;

fig. 11 is a block diagram of a user equipment for narrowband internet of things access according to the present invention;

fig. 12 is a flowchart of a narrowband internet of things access configuration method according to the present invention;

fig. 13 is a block diagram of a base station device for narrowband internet of things access configuration according to the present invention.

Detailed Description

In order to make the detailed description of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In some of the flows described in the description and claims of this detailed description and in the above figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein, with the order of the operations, e.g., 101, 102, etc., merely used to distinguish between various operations, and the order of the operations itself does not represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments, not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the examples given in this detailed description without inventive step, are within the scope of protection of this detailed description.

Referring to fig. 1, the method for accessing a narrowband internet of things in this embodiment includes the following steps:

step 101, detecting a main synchronizing signal and an auxiliary synchronizing signal to realize downlink synchronization;

step 102, detecting a physical broadcast channel to obtain main message block information;

103, acquiring first-class system message block information according to the main message block information;

Example one

Referring to fig. 2, in the present embodiment, an implementation scheme of an NBIoT (narrowband internet of things) system with a duplex mode transparent to a UE (user equipment) is introduced.

Step 201: the UE searches a cell and receives NPSS (primary synchronization signal) and NSSS (secondary synchronization signal) sent by a base station on a fixed subframe of an anchor carrier meeting channel grating degree to realize downlink synchronization; after the downlink synchronization is completed, the UE receives NPBCH (physical broadcast channel) on the fixed subframe.

Referring to fig. 3, for example, when the UE receives NPSS at subframe 5, NSSS at subframe 9, and NPBCH at subframe 0, from the system side, the LTE system with time division and double man-hour does not support the NBIoT system that configures the in-band deployment mode when the uplink and downlink subframes configure 0# (see table 1).

Step 202: and the UE acquires the time-frequency resource of the SIB1-NB (first-class system message block) according to the MIB-NB (main message block) indication (reading the resource allocation information in the MIB-NB) carried by the NPBCH sent by the base station, and receives the SIB1-NB on the time-frequency resource. The mode of indicating the time-frequency resource used by the SIB1-NB by the MIB-NB may be an explicit indication or an implicit indication combining a certain rule. Here, the frequency domain resource includes one or more carriers, and the one or more carriers may be an anchor carrier or a non-anchor carrier.

For example, the explicit indication may be to indicate the time domain and frequency domain location information transmitted by the SIB1-NB in the information bits of the MIB-NB. In addition, the MIB-NB can also indicate time domain position information, and the frequency domain position information is agreed in advance by a protocol; or the MIB-NB indicates the frequency domain position information, and the time domain position information is pre-agreed by the protocol.

The mode of the MIB-NB indicating the SIB1-NB time domain position can be an index indicating a used subframe, one embodiment can be that a protocol specifies a set of usable subframes for SIB1-NB transmission, and one or more subframes in the set of subframes are indicated in the MIB-NB for SIB1-NB transmission. The set of SIB1-NB transmission-usable subframes may include all subframes in one radio frame, or only a portion of subframes. Preferably, the subframe method used by the terminal to determine the SIB1-NB transmission may be such that the terminal reads the MIB-NB for an indication to acquire the unique subframe used by the SIB1-NB transmission, e.g. the MIB-NB indicates with 2 bits one of { subframe 0, subframe 4, subframe 8} for the SIB1-NB transmission, or 1 bit indicates one of { subframe 0, subframe 4} for the SIB1-NB transmission, where the set of subframes may also be { subframe 0, subframe 8} or { subframe 0, subframe 6}. Specifically, when the MIB-NB indicates that the unique subframe transmitted by the SIB1-NB is subframe 0, the SIB-NB can only transmit on subframe 0 of an odd-numbered radio frame; when the MIB-NB indicates that the unique subframe transmitted by the SIB1-NB is other subframes other than subframe 0, such as subframe 4, the SIB-NB may transmit in subframe 4 of each radio frame, and the specific radio frame index for transmitting the SIB1-NB may be determined according to the unique cell id and the repetition number, as shown in table 2.

Preferably, the method for the terminal to determine the subframe used for SIB1-NB transmission may further be that the terminal reads the indication of the MIB-NB to obtain the number of subframes used for SIB1-NB transmission and an index of the subframe, where the number of subframes may be 1 or more, for example, the MIB-NB indicates the subframe used for SIB1-NB transmission as subframe 0 with 1 bit, or uses subframe 0 and subframe 4 simultaneously. When the SIB1-NB is transmitted on multiple subframes, the specific transmission manner may be that the SIB1-NB is transmitted on multiple subframes of the same radio frame, and taking transmission of the SIB1-NB on subframe 0 and subframe 4 as an example, a specific implementation manner may be that the SIB1-NB is transmitted on both subframe 0 and subframe 4 of the same radio frame; or alternatively, the indicated subframes are used in different radio frames, and only one subframe is used for transmission of SIB1-NB in the same radio frame, taking SIB1-NB transmission in subframe 0 and subframe 4 as an example, a specific implementation manner may be that odd radio frame SIB1-NB is transmitted in subframe 0, and even radio frame SIB1-NB is transmitted in subframe 4. The transmission mode of the SIB1-NB in multiple subframes can be selected by system configuration or protocol fixation. In addition, the two transmission modes of the SIB1-NB in multiple subframes may also be used in combination, and one specific implementation may be that the odd radio frame SIB1-NB is transmitted in subframe 0 and other downlink subframes other than subframe 0, and the even radio frame SIB1-NB is transmitted in subframe 0. Further, the other downlink subframe index of the non-subframe 0 may be indicated by the MIB-NB, for example, the MIB-NB indicates with 1 bit that the other downlink subframe of the non-subframe 0 transmitting the SIB1-NB is subframe 4 or subframe 8, or indicates with 1 bit that the other downlink subframe of the non-subframe 0 transmitting the SIB1-NB is subframe 4 or subframe 6.

Preferably, the method for the terminal to determine the subframe used for SIB1-NB transmission may further be that the terminal reads the MIB-NB to indicate that a plurality of subframe indices usable for SIB1-NB transmission are obtained, and then obtains the subframe index actually used for SIB1-NB transmission according to the cell unique identification code, for example, the MIB-NB indicates, with 1 bit, that the subframe usable for SIB1-NB transmission is one of { subframe 0 and subframe 4, subframe 0 and subframe 8}, or one of { subframe 0 and subframe 4, subframe 0 and subframe 6}. Specifically, taking the MIB-NB to indicate that usable subframes for SIB1-NB transmission are subframe 0 and subframe 4 as examples, the terminal determines the actually used subframe for SIB1-NB transmission according to the cell unique identifier, and table 2 gives an example of the terminal acquiring the initial radio frame and radio subframe actually transmitting SIB1-NB.

The above preferred embodiments can be combined to make the number of bits in the field expandable.

TABLE 2

The way in which the MIB-NB indicates the frequency domain location of the SIB1-NB may be to indicate an offset value between the carrier used for SIB1-NB transmission and the anchor carrier, the system may specify the set of carriers that the SIB1-NB transmission may use, and the MIN-NB may indicate one or more carriers to use for the SIB1-NB transmissionThe SIB1-NB is transmitted. The one or more carriers indicated by the MIB-NB include anchor carriers and/or non-anchor carriers. When multiple carriers are configured, the transmission mode of the SIB1-NB may be frequency hopping transmission among the multiple carriers, and a specific implementation can be seen in embodiment three. The system provides that the carrier set usable for SIB1-NB transmission can be implemented in many ways, and one example may be that the configurable non-anchor carrier for SIB1-NB transmission is set as the left-adjacent or right-adjacent carrier of the anchor carrier, and the left-adjacent or right-adjacent carrier is indicated by 1 bit in the MIB-NB, i.e., the distance from the center frequency of the anchor carrier is +180kHz or-180 kHz, or the distance from the center frequency point of the anchor carrier is indicated by 1 bit, and the indication field is shown in table 3 (a), for example. Particularly, the terminal may determine, according to the deployment mode, an absolute value of a frequency difference between a non-anchor carrier and a center frequency point of an anchor carrier transmitted by the SIB1-NB, for example, when the terminal acquires that the deployment mode is the independent deployment mode, the absolute value of the frequency difference is 200kHz; when the terminal obtains that the deployment mode is the in-band deployment mode and/or the out-of-band deployment mode, the absolute value of the frequency difference is 180kHz, where the out-of-band deployment may have a non-anchor carrier frequency point obtaining manner transmitted by other SIB1-NB, as described later. When the SIB1-NB transmits a configurable number of carriers more, the indication field may be extended, and table 3 (b) gives another example of the indication field; the indication field may also indicate that the carrier configuring the transmission of SIB1-NB is one or more, table 3 (c) gives another example of an indication field; the examples of tables 3 (b) and 3 (c) may be combined with each other, and table 3 (d) gives an example of a set of combinations, in addition to which the MIB-NB may indicate 2 bits that the carriers of SIB1-NB are { anchor carrier, left-neighbor (or right-neighbor) carrier of anchor carrier, left-neighbor carrier of anchor carrier and anchor carrier, right-neighbor carrier of anchor carrier and anchor carrier }. In fact, for some scenarios when configuring the non-anchor carrier, the neighboring carriers of the anchor carrier cannot be used to send SIB1-NB, and the MIB-NB may reserve one or more statuses in the carrier indicator field for indicating that the non-anchor carrier is a carrier with a fixed frequency offset from the anchor carrier, where table 3 (c) is taken as an example to perform the extension on the MIB-NB indicator field to obtain table 3 (e), and other examples in table 3 may also perform similar extensions. More specifically, in the example of table 3 (e), the SIB1-NB carrier indication field value "11" in the MIB-NB is when the deployment mode is selectedThe formula is effective when the mode is the guard band mode, and is used for indicating the frequency domain position of the non-anchor carrier used by SIB1-NB multi-carrier transmission under a specific LTE system bandwidth, for example, when the LTE system bandwidth is 5MHz and the anchor carrier is located in the left band (or right band) of the LTE guard band, the base station configures the index so that the domain value is "11", and the terminal will have a frequency difference + F from the anchor carrier _5M (or-F) _5M ) As a non-anchor carrier for transmission of SIB1-NB, wherein F _5M Is a system fixed value. The non-anchor carrier is now located at a different sideband of the LTE guard band than the anchor carrier. It should be noted that, except for special descriptions (e.g. table 3 (e) indicates that the field value is 11), all the examples in table 3 can be applied to all the deployment modes, including the independent deployment mode, the in-band deployment mode, and the guard-band deployment mode.

TABLE 3 (a)

TABLE 3 (b)

Table 3 (c)

TABLE 3 (d)

TABLE 3 (e)

In fact, in the above example, the non-anchor carrier transmitted by SIB1-NB is not limited to the adjacent carrier of the anchor carrier, and other non-anchor carrier configuration settings may be used, for example, the non-anchor carrier having positive and negative frequency deviations from the anchor carrier may be replaced in the example of table 3. The frequency deviation of the anchor carrier and the non-anchor carrier may be a fixed frequency deviation (when the frequency deviation is ± 180kHz, the adjacent carrier of the anchor carrier is obtained), or a specific value of the frequency deviation is configured by the MIB-NB. An example of the specific value of the frequency offset configured by the MIB-NB may be that, in the guard band deployment mode, the non-anchor carrier used for configuring SIB1-NB transmission is located in an LTE guard band different from the anchor carrier, a frequency offset between the non-anchor carrier and the anchor carrier is related to an LTE system bandwidth, and an absolute frequency offset between the non-anchor carrier and the anchor carrier needs to be indicated in the MIB-NB by indicating the system bandwidth of LTE. Tables 4 (a) and (b) show two indications of absolute frequency deviation between the non-anchor carrier and the anchor carrier, respectively. The terminal needs to obtain the carrier configuration transmitted by the SIB1-NB according to the indication contents in tables 3 and 4, where "the left adjacent carrier of the anchor carrier" and "the right adjacent carrier of the anchor carrier" in table 3 are replaced with "the carrier having a frequency lower than the anchor carrier" and "the carrier having a frequency higher than the anchor carrier" respectively. Specifically, taking table 3 (d) and table 4 (b) as an example, when the SIB1-NB carrier indicated domain in table 3 (d) is configured by the base station to take a value of "01", the only carrier used for SIB1-NB transmission is the non-anchor carrier, the frequency point of the non-anchor carrier is lower than that of the anchor carrier, the terminal further reads the SIB1-NB carrier frequency domain offset indicated domain in table 4 (b), and assuming that the value is "10", the absolute frequency domain offset value of the non-anchor carrier and the anchor carrier is Δ F _15M If the frequency point of the non-anchor carrier is F _anchor -ΔF _15M In which F _anchor Is the frequency point value of the anchor carrier; SIB1-NB transmission usage when SIB1-NB carrier indication field takes on the value of "00The carrier of (b) is an anchor carrier.

TABLE 4 (a)

TABLE 4 (b)

In addition to the above example of configuring the location of the non-anchor carrier in the guard band deployment mode by the MIB-NB, another example may also be that, as shown in table 5, when the system deployment mode is the guard band mode, the terminal directly reads the 3-bit SIB1-NB carrier indication field in the MIB-NB to obtain the specific location of the carrier used for SIB1-NB transmission.

TABLE 5

In particular, different SIB1-NB frequency domain location indication manners may be used in different deployment modes, for example, in an independent deployment (standalone) scenario and an in-band deployment (in-band), with the indication manners shown in tables 3 (a) - (e), the MIB-NB may indicate a left-adjacent or right-adjacent carrier of an anchor carrier as a non-anchor carrier for transmitting the SIB1-NB; in the guard-band deployment (guard-band) scenario, the indication manners shown in tables 3 (a) - (e) may still be adopted, and an additional indication field is introduced in the MIB-NB to indicate the absolute frequency domain offset of the non-anchor carrier transmitted by the SIB1-NB, as shown in tables 4 (a) and 4 (b), and the specific SIB1-NB carrier indication method is as described above. Referring to fig. 4, the MIB-NB indicates implicitly that the time-frequency resource of SIB1-NB transmission may be a fixed number of time-frequency domain resource combinations supported by system specification, and the index value in MIB-NB indicates the resource combination actually used by SIB1-NB transmission.

One way may be to indicate uplink and downlink subframe configuration indexes (e.g. table 1) in the MIB-NB, where the uplink and downlink subframe configuration indexes have a fixed correspondence with time-frequency resources (or time-domain resources, or frequency-domain resources) used for SIB1-NB transmission, for example, when the uplink and downlink subframe configuration indexes are indicated as uplink and downlink subframe configuration 1#, 2#, 4#, and 5# in table 1, the SIB1-NB is transmitted in subframe 4# of the anchor carrier; when indicating uplink and downlink subframe configurations as other configurations in table 1, SIB1-NB is transmitted on subframe 0# (or subframe 5 #) of a fixed location non-anchor carrier (e.g., on a neighboring carrier of the anchor carrier).

In another way, as shown in fig. 4, the terminal determines the time domain position of receiving the SIB1-NB according to the carrier position of SIB1-NB transmission indicated by the MIB-NB, where the indicated carrier position of SIB1-NB transmission includes an anchor carrier and/or a non-anchor carrier, and the specific indication way may be as shown in tables 3 (a) - (e), and the ways of determining the time domain position are totally three cases, as follows:

case 1: when the SIB1-NB is transmitted on the anchor carrier, the SIB1-NB is transmitted on a fixed subframe, which may be one or more of downlink subframes such as subframe 0, subframe 4, subframe 6, and subframe 8. Specifically, when the fixed subframe is subframe 0, SIB1-NB is transmitted only on subframe 0 of the odd radio frame, and when the SIB1-NB repetition number is configured to be 16, the starting radio frames of SIB 1-NBs of all cells are the same, as shown in example one in fig. 4. The method for transmitting the SIB1-NB in multiple subframes of the same carrier is as described above.

Case 2: when the SIB1-NB is transmitted only on the non-anchor carrier, the SIB1-NB is transmitted on a fixed subframe, which may be one or more of downlink subframes such as subframe 0, subframe 5, or subframe 9, which may be the same or different from the subframes used in case 1, or even a different number of subframes. Fig. 4 is a schematic diagram illustrating the time domain resources occupied by the SIB1-NB when transmitting on the non-anchor carrier, which is only given by taking subframe 0 as an example. The method for transmitting the SIB1-NB in multiple subframes of the same carrier is as described above.

Case 3: when the SIB1-NB performs multi-carrier transmission, i.e. multi-carrier frequency hopping transmission, on the anchor carrier and the non-anchor carrier, the SIB1-NB is transmitted on the fixed subframes of the anchor carrier and the non-anchor carrier, respectively. In frequency hopping transmission, the subframes used by the SIB1-NB in the anchor carrier may be the same or different, or even a different number of subframes, than the subframes used in the non-anchor carrier. Fig. 4 illustrates a third schematic diagram of the time domain resources occupied by SIB1-NB frequency hopping transmission by taking an example in which the anchor carrier and the non-anchor carrier both use subframe 0 to transmit SIB1-NB. The method for transmitting the SIB1-NB in multiple subframes of the same carrier is as described above.

The time domain position sent by the SIB1-NB may also be explicitly indicated by the MIB-NB, and the specific implementation method is as described above. Step 203: and the UE acquires time domain and frequency domain resources used by the base station for sending other system message blocks according to the instructions in the MIB-NB and/or the SIB1-NB, and receives other system message blocks on the time domain and frequency domain resources. Other system message blocks including, but not limited to, one or more of SIB2-NB, SIB3-NB, SIB4-NB, SIB5-NB, SIB14-NB, and SIB 16-NB. The frequency domain resources include one or more carriers, and the one or more carriers may be anchor carriers or non-anchor carriers. The reading of the indication in the SIB1-NB may be reading resource allocation information for other system message blocks in the SIB1-NB; the reading of the indication in the MIB-NB may be reading an uplink subframe configuration index and a downlink subframe configuration index in the MIB-NB, and determining a time-frequency domain resource of the system message block according to the uplink subframe configuration index and the downlink subframe configuration index, for example, when the uplink subframe configuration index and the downlink subframe configuration index in the MIB-NB are 0# (or 1#, or 6 #) in table 1, other system message blocks and the SIB1-NB are sent on different carriers, and the carrier for sending the other system message blocks may be obtained by calculation according to an anchor carrier position, or may be indicated in the SIB1-NB; when the uplink and downlink subframe configuration index in the MIB-NB is # 2 (or # 3, or # 4, or # 5) in table 1, other system message blocks are transmitted on the same carrier as the SIB1-NB. The design can ensure that the system has enough downlink resources, namely the downlink subframes on the non-anchor carrier, under the condition of the configuration of the uplink subframes and the downlink subframes with lower downlink subframe occupation.

Besides the existing configuration of indicating the downlink invalid subframes, the SIB1-NB can also indicate the uplink invalid subframes. When used in a TDD scenario, the uplink/downlink invalid subframe configuration may be used to indicate an uplink subframe and a downlink subframe, respectively. The configuration manner of the time domain resources may be the same as the existing mechanism, or may be the same as the configuration manner of the time domain resources of SIB1-NB in step 202. The frequency domain resources (i.e. carriers) may be configured in the same manner as the frequency domain resources of the SIB1-NB in step 202, i.e. explicit indication, or implicit indication in combination with certain rules. For example, an offset value between the carrier used for other system message block transmissions and the anchor carrier may be indicated in SIB1-NB as an explicit indication; or, configuring a plurality of carriers in the SIB1-NB in an implicit configuration mode for inter-carrier frequency hopping transmission of other system message blocks (see embodiment III); or, the carrier used by other system message block transmission is appointed to multiplex the carrier used by SIB1-NB transmission, which is implicitly informed and does not need indication bits.

Carriers used by NPDCCH (physical downlink control channel), NPDSCH (physical downlink shared channel) and NPUSCH (physical uplink shared channel) transmitted by subsequent UEs may also adopt the same configuration mode as the system message block, and according to different information carried by the physical channels, the information carrying the configuration information may also be different, for example, system messages, such as SIB2-NB, may be used to configure carriers used by the NPDCCH and NPDSCH that are commonly transmitted; the carriers used by NPDCCH, NPUSCH and NPDSCH for user-specific transmissions are configured using user-specific signaling, e.g. a contention resolution message Msg 4. The configuration information of a specific carrier may use the carrier configuration indication manner used for the system message block transmission described above. The NPUSCH may include NPUSCH format 1 and NPUSCH format 2.

Example two

Referring to fig. 5, in the present embodiment, an implementation of NBIoT system in which duplexing is not transparent to UEs is described.

Step 301: the UE carries out blind detection on the NPSS and the NSSS which are sent by the base station at all possible positions, thereby acquiring the duplex mode of the system and completing the processes of cell search and downlink synchronization; and the UE receives the MIB-NB on the time domain resource and the carrier wave corresponding to the PBCH sent by the base station according to the duplex mode. Wherein, the frequency domain resource position of any one of NPSS, NSSS and NPBCH can be located in the anchor carrier or the non-anchor carrier.

In different duplex modes, the NPSS and/or NSSS use different physical resources, and the physical resources used by the NPSS and/or NSSS have one-to-one correspondence with the duplex modes, so that the NPSS and/or NSSS can be used for indicating the duplex mode of the UE system. After finishing downlink synchronization, the UE determines a duplex mode according to physical resources used by the NPSS and/or the NSSS, then determines corresponding time domain and/or frequency domain resources used by the NPBCH according to the duplex mode, receives the NPBCH to acquire the MIB-NB, and time frequency resources used by the NPBCH in different duplex modes can be the same or different. An example of the different time domain resources used by the NPBCH in the different duplex modes may be that the NPBCH in the two duplex modes is sent on the same carrier, but the time domain periods are different: the NPBCH under FDD is transmitted on the subframe 0 of each radio frame of the anchor carrier; in TDD, NPBCH may be sent on subframe 0 of a radio frame spaced apart by a period of the anchor carrier, e.g., every P _MIR One radio frame is sent to one NPBCH subframe, and the index of the radio frame for sending the NPBCH at the moment meets the formula mod (n) _f ,P _MIB ) =0, wherein n _f For radio frame index, P _MIB For the period of sending NPBCH (for system configuration parameters or fixed parameters), mod (×) represents the modulo operation; or, every P may be ordered _MIB Sending a plurality of continuous NPBCH subframes by each radio frame, wherein the index of the radio frame for sending the NPBCH at the moment meets the formula mod (n) _f ,P _MIB )＝x，x∈{0,…,N _MIB H, where n is _f Is a radio frame index, P _MIB For the period of NPBCH transmission (for system configuration parameters or fixed parameters), mod (. + -.) denotes the modulo operation, N _MIB The number of radio frames (system configuration parameters or fixed parameters) of the NPBCH which is continuously transmitted. The design may ensure that a portion of the downlink resources may still be available for unicast transmission when TDD downlink resources are limited. Further onIf the NPSS and/or NSSS can indicate the duplex mode and the uplink and downlink subframe configuration index simultaneously, the terminal can acquire different NPBCH sending periods P according to the uplink and downlink subframe configuration _MIB And/or continuously transmitting the number of radio frames N _MIB For uplink and downlink subframe configuration P with limited downlink resources _MIB And N _MIB Can be larger, and configures P for the uplink and downlink subframes with sufficient downlink resources _MIB And N _MIB May be smaller. The physical resources used by the NPSS and/or NSSS include at least one of time domain resources, frequency domain resources, and sequence resources. The method for indicating the duplexing mode using the time-frequency domain resources of NPSS and/or NSSS may refer to embodiment four. In addition, the duplex mode may also be determined by using the sequence resources as physical resources, for example, in two duplex modes (TDD and FDD), the NPSS and/or NSSS use different orthogonal sequences to transmit on the same time-frequency resource, and the duplex mode and the orthogonal sequences used by the NPSS and/or NSSS have a one-to-one correspondence relationship. The orthogonal sequences may correspond to each other in two duplex manners, where NPSS uses different ZC root sequences, for example, FDD uses a ZC root sequence with index 5, and TDD uses other ZC root sequences with low correlation. Or, the correspondence between the orthogonal sequences may be that NPSS uses different orthogonal mask sequences in two duplex modes. Taking a conventional subframe scenario as an example, an example of NPSS mask sequence generation in two duplex modes is given below. The FDD lower mask sequence is an existing implementation as shown in table 6.

Table 6 example mask sequences used by NPSS under FDD

The mask sequence used by NPSS in TDD may be generated according to the following formula,

wherein ρ (n) = -1 when n =7,8,12, otherwise ρ (n) =1; k may be any of 1 to 10A positive integer. Table 2, i.e. k =1, a specific example of a mask sequence used by NPSS in TDD.

Step 302: the UE acquires time domain and/or frequency domain resources used by the base station for sending the SIB1-NB according to the MIB-NB indication (reading the resource allocation information in the MIB-NB) carried by the NPBCH sent by the base station or according to the MIB-NB indication and combining a duplex mode, and receives the SIB1-NB on the time domain and/or frequency domain resources. The frequency domain resources include one or more carriers, and the one or more carriers may be anchor carriers or non-anchor carriers.

The mode of the MIB-NB indicating the SIB1-NB to use the time-frequency resource may be an explicit indication or an implicit indication combining a certain rule. The configuration is the same as that described in the first embodiment.

The rule that the UE receives and acquires the SIB1-NB in the subframe 4 of the anchor carrier according to the MIB-NB indication and combines the duplex mode may be that the UE receives and acquires the SIB1-NB in the subframe 4 of the anchor carrier under FDD, receives and acquires the SIB1-NB in the fixed subframe of the non-anchor carrier having a fixed offset from the anchor carrier under TDD, and acquires the radio frame information transmitted by the SIB1-NB in combination with the SIB1-NB transmission period, repetition number, and the like included in the MIB-NB information. The non-anchor carrier with a fixed offset from the anchor carrier may be a neighbor carrier of the anchor carrier. The fixed subframe may be subframe 0 or subframe 5.

Step 303: and the UE acquires time domain and/or frequency domain resources used by the base station for sending other system message blocks according to the indication of the SIB1-NB (reading resource allocation information in the SIB 1-NB), and receives the other system message blocks on the time domain and/or frequency domain resources. The frequency domain resources include one or more carriers, and the one or more carriers may be anchor carriers or non-anchor carriers.

In the aspect of uplink and downlink subframe configuration, in addition to the method for configuring the uplink subframe and the downlink subframe in the TDD scenario respectively by using the uplink invalid subframe indicator and the downlink invalid subframe indicator in the SIB1-NB in the first embodiment, the base station may further send an index of the uplink and downlink subframe configuration in table 1 in the SIB1-NB for the in-band deployment scenario, where the UE process is: the UE firstly reads the information of operationModelinfo-r 13 in the MIB-NB, and when the deployment mode is in-band deployment (Inband-SamePCI-NB-r 13 or Inband-DifferencentPCI-NB-r 13), the configuration information of uplink and downlink subframes is obtained according to the configuration index of the uplink and downlink subframes in the SIB1-NB.

Other system message blocks including, but not limited to, one or more of SIB2-NB, SIB3-NB, SIB4-NB, SIB5-NB, SIB14-NB, and SIB 16-NB. The time domain resources may be configured in the same manner as described in embodiment step 203. The carrier configuration used by NPDCCH, NPDSCH and NPUSCH for subsequent UE transmission may also be the same as the corresponding configuration described in step 203 of the embodiment.

Several of the details described in example one and example two may be combined.

EXAMPLE III

In this embodiment, a multi-carrier configuration method for inter-carrier frequency hopping transmission of physical channels including, but not limited to, NPDSCH, NPDCCH, NPUSCH format 1, NPUSCH format 2, etc. is explained. The multi-carrier configuration method can be used in a scenario that the duplex mode described in the first embodiment is transparent to the UE, and can also be used in a scenario that the duplex mode described in the second embodiment is non-transparent to the UE, that is, can be used in multi-carrier configuration of frequency hopping transmission such as the first type system message block, other system message blocks, NPDSCH, NPDCCH, NPUSCH format 1, NPUSCH format 2, and the like in the first embodiment and the second embodiment.

Since NBIoT can be deployed in the LTE system band and eMTC can also be deployed in the LTE system band, the configured multicarrier (i.e., physical resource block) needs to avoid the physical resource block used by the LTE system to transmit common signaling such as PBCH, non-primary message system message, downlink synchronization signal, and the like, and also needs to avoid the physical resource block used by the eMTC to transmit SIB 1-BR. The UE needs to obtain configuration parameters of initial carrier offset, initial carrier serial number, carrier spacing and carrier number, and determines a plurality of carrier positions used for frequency hopping among carriers of the physical channel according to a certain rule. The starting carrier offset indicates a frequency spacing between a starting carrier and an anchor carrier in the configured multi-carriers; the starting carrier sequence number indicates the sequence number of the starting carrier in the configured multi-carriers; the carrier spacing indicates a frequency interval of any two adjacent carriers in the configured multi-carriers; the number of carriers indicates the number of configured multiple carriers.

Referring to fig. 6, a rule for determining locations of a plurality of carriers used for frequency hopping among physical channel carriers includes: the UE firstly determines the frequency domain position of an initial carrier in the configured multi-carriers according to the initial carrier offset, then determines the number of the configured multi-carriers according to the number of the carriers, determines the sequence number of the initial carrier in the configured multi-carriers by combining the sequence number of the initial carrier, and finally searches upwards or downwards from the initial carrier according to the initial carrier number to obtain the positions of the multiple carriers according to the carrier spacing. For example, in the example of fig. 6, the number of multiple carriers is 4, the starting carrier number is 1, the UE obtains the positions of all carriers by starting from the starting carrier frequency domain position, setting the frequency domain position 1 times the carrier spacing upward as the carrier number 0, setting the frequency domain position 1 times the carrier spacing downward as the carrier number 2, and setting the frequency domain position 2 times the carrier spacing downward as the carrier number 3.

Referring to fig. 7, when considering a scenario in which the SIB1-NB performs multi-carrier frequency hopping transmission, the UE may receive the SIB1-NB (e.g., subframe 0 or subframe 5) in a fixed subframe of a configured multi-carrier, or determine a subframe used by the SIB1-NB according to carrier configuration information, and the configuration parameters of the multi-carrier determine the subframe used by the SIB1-NB to transmit according to a certain rule. FIG. 7 shows an example, when the UE reads the starting carrier offset 0 (at this time, the base station sends SIB1-NB using the anchor carrier), the UE collects SIB1-NB messages in a certain fixed subframe, which may be subframe 4; when the UE reads that the starting carrier offset is not 0 (at this time, the base station does not use the anchor carrier to send the SIB 1-NB), the UE receives the SIB1-NB in a certain fixed subframe, which may be subframe 0 or subframe 5. The base station may perform initial carrier offset configuration according to the system duplex mode, for example, when the system duplex mode is FDD, or the duplex mode is TDD but the subframe 4 is a downlink subframe, the initial carrier offset is configured to be 0; otherwise, the start carrier offset is configured to be 1.

The multi-carrier configuration mode can be explicit or implicit, the explicit configuration refers to the configuration of one or more of the multi-carrier configuration parameters in a mode of directly indicating parameter values, and the implicit configuration refers to the configuration of one or more of the multi-carrier configuration parametersA plurality of values are fixed by the system or determined according to the indication bit and the system rule. An example of explicit and implicit parameter configuration is described below with an example of a multi-carrier configuration used by the MIB-NB to configure the SIB1-NB for inter-carrier frequency hopping. MIB-NB 2-bit (indication bit) indication starting carrier offset F _offset The optional parameter set is {360kHz, -360kHz,0kHz }; indicating the starting carrier number I with 2 bits _start The optional parameter set is {0,1,2,3}; when NBIoT is in-band deployment mode, the number of carriers N is indicated by 3 bits _PRB Spaced from the carrier by a distance F _gap1 And F _gap2 As shown in table 7.

Table 7 multicarrier configuration parameter example

Index value	0	1	2	3	4
						Number of carriers N _PRB	2	2	2	4	4
Carrier spacing F _gap1	1260kHz	2340kHz	4320kHz	3240kHz	4320kHz
						Carrier spacing F _gap2	0	0	0	180kHz	0

For indicating N _PRB 、F _gap1 And F _gap2 Indication bit I of _FH (i.e., the index values of table 7) are selected according to the LTE system bandwidth, as shown in table 8.

TABLE 8LTE System Bandwidth List

Index value	0	1	2	3	4
						Bandwidth of LTE system	3MHz	5MHz	10MHz	15MHz	20MHz

When NBIoT is either a guardband deployment or a standalone deployment, the configuration parameters of table 8 may be reused, or some default configuration value used. Setting the center frequency point of the anchoring carrier as F _anchor Then at this point the UE may calculate the physical resource block index used for SIB1-NB transmission according to the following formula,

F _anchor +F _offset +(i-I _start )×F _gap1 +m×F _gap2 ,i＝0,…,N _PRB -1，

wherein,

when the NBIoT deployment mode is in-band deployment or guard band deployment, the base station may select a suitable value for avoiding the middle 72 subcarriers of LTE and the physical resource block that may be used for eMTC transmission SIB1-BR according to the usage of the current in-system carrier, for example, when the system bandwidth is 20MHz, the anchor carrier is a physical resource block with index 4 in LTE, and the base station may configure F _offset ＝360kHz，I _start =0, indicating bit I _FH ＝4。

After acquiring the multi-carrier position, the UE performs frequency hopping reception or transmission according to the frequency hopping transmission pattern from the initial carrier, wherein the initial carrier is defined as a carrier used for transmitting or receiving the initial subframe. The starting carrier can be the maximum or minimum frequency point in the configured multi-carrier; or, the starting carrier is the anchor carrier. Frequency hopping may begin with a starting carrier, cycling through all frequency bins in order of frequency bin high to low or low to high.

Since the time-frequency resources used for frequency hopping transmission form a pattern of frequency hopping transmission, taking frequency hopping transmission on two carriers, i.e., an anchor carrier and a non-anchor carrier as an example, fig. 8 illustrates a specific embodiment of a frequency hopping pattern, and different frequency hopping patterns can be used in different cells or different users. The basic principle is to transmit by using two carriers alternately from a starting carrier (which may be an anchor carrier or a non-anchor carrier), wherein the minimum time granularity of frequency hopping in the first example and the second example is a radio frame, and the minimum time granularity of frequency hopping in the third example and the fourth example is less than one radio frame; the first and third examples represent uninterrupted radio frames between hopping transmissions, and the second and fourth examples represent interrupted radio frames between hopping transmissions.

Example four

In the present embodiment, an example of a time-frequency domain resource indication duplexing method using NPSS and/or NSSS is explained.

When the UE searches the cell, the NPSS sent by the base station is received on the fixed subframe of the carrier meeting the channel grid degree, blind detection is carried out on the time-frequency resource position (wherein the frequency-domain resource position of the NPSS and/or the NSSS can be on the anchor carrier or the non-anchor carrier) where the base station possibly sends the NSSS, the duplex mode used by the current cell is identified according to the detected time-frequency resource position of the NSSS, and the NPSS and the NSSS can use the same sequence under different duplex modes. And after finishing downlink synchronization, the UE acquires time-frequency resources used by the base station for sending the NPBCH according to a certain rule. The certain rule may be that the UE receives NPBCH on fixed time-frequency resources, for example, the subframe 0 of the anchor carrier, or the UE receives NPBCH on different time-frequency resources according to a duplex mode, for example, the UE receives NPBCH on the subframe 0 of the anchor carrier when the duplex mode is FDD, and receives NPBCH on the subframe 5 of a non-anchor carrier having a fixed offset relationship with the anchor carrier when the duplex mode is TDD, where the non-anchor carrier may be an adjacent carrier of the anchor carrier.

In TDD and FDD modes, at least one of the time domain and frequency domain resource locations sent by NPSS and/or NSSS is different. The different time domain resource positions can be that NPSS and/or NSSS have different interval periods or sending opportunities in different duplex modes although the NPSS and/or NSSS are sent on subframes with the same index; or, NPSS and/or NSSS may be transmitted on subframes with different indexes in different duplex modes. The different frequency domain resource locations may be different carriers, or different subcarriers on the same carrier.

Referring to fig. 9, fig. 9 shows an example. The method comprises the steps that when UE conducts cell search, NPSS is received on a subframe 5 of a carrier meeting channel grating degree, then the UE tries to receive NSSS on a subframe 9 of an even radio frame on an anchor carrier, and if the NSSS is received correctly, the UE can judge that the duplex mode of a system is FDD; if the NSSS can not be detected, the NSSS is tried to be received in the subframe 0 (or the subframe 5) of the odd radio frame on the non-anchor carrier with the fixed offset with the anchor carrier, if the NSSS is correctly received, the UE can judge that the duplex mode of the system is TDD, otherwise, the UE fails in downlink synchronization. The non-anchor carrier with a fixed offset from the anchor carrier may be a neighbor carrier of the anchor carrier. After finishing downlink synchronization, the UE receives NPBCH on subframe 0 of the anchor carrier. In this example, NPSS and NSSS may also be sent in different subframes on the same anchor carrier in TDD case, for example, when the terminal receives NPSS in subframe 9 of the anchor carrier and detects NSSS in subframe 5 of the anchor carrier, the UE may determine that the duplex mode of the system is TDD.

Referring to fig. 10, fig. 10 shows another example. When the UE searches the cell, the NPSS is received on the subframe 5 of the carrier meeting the channel raster, then the UE tries to receive the NSSS on the subframe 9 of the even radio frame on the anchor carrier, and if the NSSS is correctly received, the UE can judge that the duplex mode of the system is FDD; if NSSS can not be detected, subframe 0 of odd radio frames on the anchor carrier wave tries to receive NSSS, if the NSSS is correctly received, the UE can judge that the duplex mode of the system is TDD, otherwise, the UE fails in downlink synchronization. The UE obtains time-frequency resources of the NPBCH according to a system duplex mode, and when the duplex mode is FDD, the UE completing downlink synchronization receives the NPBCH on a subframe 0 of an anchor carrier; when the duplex mode is TDD, the UE completing downlink synchronization receives NPBCH on subframe 0 of the non-anchor carrier with a fixed offset from the anchor carrier, where the non-anchor carrier with the fixed offset from the anchor carrier may be an adjacent carrier of the anchor carrier.

To implement NB-IoT system deployment in TDD duplex mode, a method for a terminal to acquire a center frequency point of an SIB1-NB transmission carrier and acquire a time-frequency resource used for transmission of the SIB1-NB on the carrier is described below. The method can be used in combination with the methods of the first, second, third and fourth embodiments, and comprises the following steps:

step 501: the UE tunes a downlink central frequency point to an anchor carrier frequency point, receives NPSS and NSSS on the anchor carrier for downlink synchronization, and receives NPBCH to read the MIB-NB; step 502: the UE reads the MIB-NB to acquire the central frequency point of the SIB1-NB transmission carrier, wherein the SIB1-NB transmission carrier can be an anchor carrier or a non-anchor carrier. The terminal acquires MIB-NB indication information for determining an SIB1-NB transmission carrier, wherein the MIB-NB indication information at least comprises one of SIB1-NB transmission carrier central frequency point indication/SIB 1-NB transmission PRB index indication, a frequency difference between the SIB1-NB transmission carrier and the central frequency point of an anchor carrier/an index difference between the SIB1-NB transmission PRB and the anchor PRB, an SIB1-NB transmission carrier deployment mode, an anchor carrier deployment mode, an LTE system bandwidth, a SIB1-NB transmission carrier central frequency point and subcarrier offset number of configured frequency points/a frequency difference between the SIB1-NB transmission carrier central frequency point and the configured frequency points, and the configured frequency points can be left adjacent or right adjacent carriers/PRBs of the anchor carrier.

Step 503: the UE acquires time-frequency resources transmitted by the SIB1-NB, wherein the time-frequency resources at least comprise one of subframe indexes used by the SIB1-NB on a transmission carrier thereof and Resource Element (RE) positions used for rate matching when the SIB1-NB transmits the used subframes on the transmission carrier thereof. The terminal acquires indication information for determining the time-frequency resource transmitted by the SIB1-NB, wherein the indication information at least comprises one of an SIB1-NB transmission carrier deployment mode, an anchor carrier deployment mode, an SIB1-NB transmission subframe index indication, an SIB1-NB transmission carrier central frequency point, and uplink and downlink subframe configuration.

Step 504: the UE tunes the downlink central frequency point to the central frequency point of the SIB1-NB transmission carrier, and receives the SIB1-NB according to the time-frequency resource transmitted by the SIB1-NB acquired in the step 503.

Preferably, in step 502, the UE acquires the deployment mode of the anchor carrier, and determines the manner of acquiring the center frequency (or SIB1-NB transmits the PRB index) of the SIB1-NB transmission carrier, and particularly, when the deployment modes of the anchor carriers are different, the manner of acquiring the center frequency of the SIB1-NB transmission carrier by the UE is different. One example is that when the deployment mode in which the UE acquires the anchor carrier is the independent deployment mode, it is determined according to the MIB-NB instruction that the SIB1-NB transmission carrier is the anchor carrier, or the left-adjacent or right-adjacent carrier of the anchor carrier, that is, the difference between the center frequency point of the SIB1-NB transmission carrier and the frequency point of the anchor carrier is-200 kHz or +200khz, and the MIB-NB instruction information configuration method can be as shown in table 3 (b); when the UE acquires that the deployment mode of the anchor carrier is the in-band deployment mode, the SIB1-NB is determined to transmit the PRB as the anchor PRB or the left-adjacent or right-adjacent PRB of the anchor PRB according to the MIB-NB indication, namely the difference between the central frequency point of the SIB1-NB transmitting the PRB and the central frequency point of the anchor PRB is-180 kHz or +180kHz, namely the difference between the SIB1-NB transmitting the PRB index value and the anchor PRB index value is-1 or +1, the MIB-NB indication information configuration method can be as shown in Table 3 (b).

Preferably, when the UE acquires that the deployment mode of the anchor carrier is the out-of-band deployment mode, it is determined according to the MIB-NB instruction that the SIB1-NB transmission carrier/PRB at least includes one of the following possibilities, the anchor carrier, or a left-adjacent carrier of the anchor carrier, or a right-adjacent carrier of the anchor carrier, or a non-anchor carrier having a certain frequency difference/subcarrier offset from the left-adjacent carrier of the anchor carrier, or a non-anchor carrier having a certain frequency difference/subcarrier offset from the right-adjacent carrier of the anchor carrier, or a non-anchor carrier having a certain frequency difference from the anchor carrier.

Preferably, the UE may obtain the frequency difference between the non-anchor carrier and the anchor carrier transmitted by the SIB1-NB according to a deployment mode of the anchor carrier, an LTE system bandwidth, and/or a frequency difference between central frequency points of the SIB1-NB transmission carrier and the anchor carrier (an index difference between the SIB1-NB transmission PRB and the anchor PRB), and/or a relative position relationship between the SIB1-NB transmission carrier and the central frequency point of the anchor carrier. One example is that, when the deployment mode of the anchor carrier acquired by the UE is the out-of-band deployment mode and the relative position relationship between the SIB1-NB transmission carrier and the anchor carrier center frequency point is acquired such that the SIB1-NB transmission carrier center frequency is smaller than the anchor carrier center frequency, reading the LTE system bandwidth indication in the MIB-NB and acquiring an absolute value of the frequency difference between the SIB1-NB transmission carrier and the anchor carrier center frequency point as F (the configuration method may be as in tables 4 (a) and 4 (b)) through a corresponding relationship between the LTE system bandwidth and the absolute value of the frequency difference between the SIB1-NB transmission carrier and the anchor carrier center frequency point, where the frequency difference between the SIB1-NB transmission carrier and the anchor carrier center frequency point is-F; otherwise, when the relative position relationship between the SIB1-NB transmission carrier and the center frequency point of the anchor carrier is obtained by the UE, and the SIB1-NB transmission carrier center frequency is greater than the anchor carrier center frequency, the process is the same, and the frequency difference between the SIB1-NB transmission carrier and the center frequency point of the anchor carrier obtained by the UE is + F. In this example, the absolute value of the frequency difference or the frequency difference between the SIB1-NB transmission carrier and the anchor carrier center frequency point may also be indicated by the MIB-NB, that is, the MIB-NB indicates the value of the absolute value F of the frequency difference, or indicates the value of the frequency difference + F/-F.

Preferably, the UE may obtain the non-anchor carrier center frequency transmitted by the SIB1-NB according to a deployment mode of the anchor carrier, an LTE system bandwidth, and/or a sub-carrier offset number of the SIB1-NB transmission carrier center frequency point and the configured frequency point (or a frequency difference between the SIB1-NB transmission carrier center frequency point and the configured frequency point), and/or a relative position relationship between the SIB1-NB configured frequency point (or the transmission carrier) and the anchor carrier center frequency point, where the configured frequency point is a right-adjacent or left-adjacent carrier that differs from the anchor carrier center frequency point by +180kHz or-180 kHz. One example is that when the deployment mode of the anchor carrier acquired by the UE is an out-of-band deployment mode and the relative position relationship between the frequency point configured by the SIB1-NB and the center frequency point of the anchor carrier is acquired such that the center frequency of the frequency point configured by the SIB1-NB is less than the center frequency of the anchor carrier, the configured frequency point of the SIB1-NB is a left-adjacent carrier of the anchor carrier; otherwise, the configured frequency point of the SIB1-NB is the right adjacent carrier of the anchor carrier. The UE reads an LTE system bandwidth indication in the MIB-NB and acquires an absolute value (or an absolute value of a frequency difference) of the frequency difference between the SIB1-NB transmission carrier and the center frequency point of the anchor carrier according to the corresponding relation between the LTE system bandwidth and the absolute value (or the absolute value of the frequency difference) of the offset number of the sub-carriers of the SIB1-NB transmission carrier and the configured frequency point; or, the UE directly reads the indication information of the absolute value (or the absolute value of the frequency difference) of the offset number of the carrier center frequency point and the sub-carrier of the configured frequency point transmitted by the SIB1-NB in the MIB-NB. Suppose that the number of sub-carrier offsets acquired by the UE is N.F _sc Wherein N is the absolute value of the offset number of the sub-carriers, which can be a positive number or zero, F _sc Is the subcarrier spacing. At subcarrier spacing F _sc Equal to 15kHz, for example, when the configured frequency point of the SIB1-NB is the left adjacent carrier of the anchor carrier, the SIB1-NB transmission carrier and the anchor carrier acquired by the UEThe frequency difference of the central frequency point is- (N + 12) · 15kHz, namely the central frequency point of the anchor carrier shifts (N + 12) subcarriers to the left; when the configured frequency point of the SIB1-NB is the right adjacent carrier of the anchor carrier, the frequency difference between the SIB1-NB transmission carrier acquired by the UE and the center frequency point of the anchor carrier is (N + 12) · 15kHz, that is, the center frequency point of the anchor carrier is shifted to the right by (N + 12) subcarriers. In the above example, the number (or frequency difference) of the sub-carrier offsets between the SIB1-NB transmission carrier and the configured frequency point may also be indicated by the MIB-NB, that is, the value of the indicated N may be positive or negative or zero. The possible way for the UE to directly read the MIB-NB to obtain the information indicating the absolute value of the number of sub-carrier offsets (or the absolute value of the frequency difference) between the center frequency point of the SIB1-NB transmission carrier and the configured frequency point can be as shown in table 8,

TABLE 8

A possible way for the UE to directly read the MIB-NB to obtain the information indicating the offset number (or frequency difference) of the sub-carriers between the SIB1-NB transmission carrier center frequency point and the configured frequency point can be shown in table 9,

TABLE 9

A possible method for the UE to obtain the absolute value of the frequency difference (or absolute value of the frequency difference) between the SIB1-NB transmission carrier and the central frequency point of the anchor carrier through the corresponding relationship between the LTE system bandwidth and the absolute value of the number of sub-carrier offsets (or absolute value of the frequency difference) between the central frequency point of the SIB1-NB transmission carrier and the configured frequency point is shown in table 10,

watch 10

Preferably, in step 503, the UE may obtain a subframe index used by the SIB1-NB on its transmission carrier according to the SIB1-NB transmission subframe index indication, and/or the SIB1-NB transmission carrier center frequency point, and/or the uplink and downlink subframe configuration, which may be seen in embodiment one.

Preferably, in step 503, the UE may acquire the RE positions used for rate matching when the SIB1-NB transmits the used subframes on its transmission carrier according to the SIB1-NB transmission carrier deployment pattern and/or the anchor carrier deployment pattern. One possible way for the UE to obtain the SIB1-NB transport carrier deployment pattern is to read the MIB-NB indication, and/or read the anchor carrier deployment pattern and obtain it according to the relationship between the anchor carrier deployment pattern and the SIB1-NB transport carrier deployment pattern. One example is that when the SIB1-NB transmission carrier deployment mode acquired by the UE is the independent deployment mode or the out-of-band deployment mode, the RE positions used for rate matching when the UE acquires the used subframe transmission of the SIB1-NB on its transmission subcarrier are all REs in the subframe transmitted by the SIB1-NB except NRS, that is, resource mapping is performed from the symbol with the subframe index of 0; when the SIB1-NB transmission carrier deployment mode acquired by the UE is the in-band deployment mode, if the anchor carrier deployment mode is the in-band deployment mode, the UE acquires the number of LTECRS ports and/or LTEPCI according to the anchor carrier deployment mode configuration in the MIB-NB, and calculates the position of RE occupied by LTECRS, at this time, the UE acquires the symbol start with the subframe index number of 3 for rate matching when the SIB1-NB transmits the used subframe on the transmission subcarrier thereof, and the available RE does not include the position of LTECRS and the position of NRS; when the SIB1-NB transmission carrier deployment mode acquired by the UE is the in-band deployment mode, if the anchor carrier deployment mode is the guard band deployment mode or the independent deployment mode, the UE assumes that the LTE port number is 4 and

calculating the position of RE occupied by LTECRS, wherein

Unique identification code (PCI) for LTE physical layer cellntity)，

NB-IoT physical layer cell unique identification code (NPCI), when the UE acquires SIB1-NB for rate matching at transmission of used subframes on its transmission subcarriers starting from a symbol with subframe index 3 and the available REs do not contain the location of LTECRS and the location of NRS.

One example of the SIB1-NB transmission carrier deployment mode obtained by the UE is that, when the SIB1-NB transmission carrier deployment mode obtained by the UE is in-band deployment or independent deployment, it is assumed that the deployment mode of the SIB1-NB transmission carrier is the same as the deployment mode of the anchor carrier; when the UE acquires the deployment mode of the anchor carrier as the protection band deployment, the UE reads the MIB-NB indication information to acquire the deployment mode of the SIB1-NB transmission carrier as the in-band deployment mode or the non-in-band deployment mode. Another example of the UE acquiring the SIB1-NB transmission carrier deployment pattern is that the UE acquires the deployment pattern of the anchor carrier, and assumes that the SIB1-NB transmission carrier deployment pattern is the same as the anchor carrier deployment pattern. Another example of the UE acquiring the SIB1-NB transmission carrier deployment mode is that the UE reads MIB-NB indication information to acquire the deployment mode of the SIB1-NB transmission carrier as an in-band deployment mode or a non-in-band deployment mode.

Referring to fig. 11, the ue for narrowband internet of things access according to the present embodiment includes:

a downlink synchronization module 11, configured to detect a primary synchronization signal and a secondary synchronization signal to implement downlink synchronization;

a primary message acquiring module 12, configured to detect a physical broadcast channel to acquire primary message block information;

a system message obtaining module 13, configured to obtain first-class system message block information according to the main message block information;

wherein at least one of the primary synchronization signal, the secondary synchronization signal, the primary message block, and the first type of system message block is included in a non-anchor carrier.

The working processes of the downlink synchronization module 11, the main message acquisition module 12, and the system message acquisition module 13 respectively correspond to

steps

101, 102, and 103 of the narrowband internet of things access method in this embodiment, and are not described herein again.

Referring to fig. 12, the method for configuring access to a narrowband internet of things in this embodiment includes the following steps:

step 401, sending a main synchronization signal and an auxiliary synchronization signal to realize downlink synchronization;

step 402, sending a main message block in a physical broadcast channel to configure basic transmission parameters of a system;

step 403, sending a first type system message block to configure other system basic transmission parameters;

The narrowband internet of things access configuration method in the embodiment corresponds to the narrowband internet of things access method, the narrowband internet of things access method is applied to the UE device, and the narrowband internet of things access configuration method is applied to the base station device. For the embodiments of the narrowband internet of things access configuration method in this specific embodiment, reference is made to the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment, which are not described herein again. It should be noted that the primary message block sent by the base station contains basic transmission parameters of the NBIoT system, such as the band deployment mode (independent deployment, in-band deployment, guard band deployment), the frame number, etc., and the base station sends the primary message block to notify the UE of these basic transmission parameters. The first type of system message block transmitted by the base station contains other system basic transmission parameters such as cell selection, power, downlink unavailable subframes of NBIoT, reference signals and the like, and the base station transmits the first type of system message block to inform the UE of the other basic transmission parameters. The main message block and the first type system message block information are all the contents which are required to be acquired by the UE for accessing the network.

Referring to fig. 13, a base station device for narrowband internet of things access configuration according to this embodiment includes:

a downlink synchronization module 21, configured to send a primary synchronization signal and an auxiliary synchronization signal to implement downlink synchronization;

a primary message configuration module 22, configured to send a primary message block on a physical broadcast channel to configure basic transmission parameters of the system;

a system message configuration module 23, configured to send a first type of system message block to configure other system basic transmission parameters;

The working processes of the downlink synchronization module 21, the main message configuration module 22 and the system message configuration module 23 respectively correspond to

steps

401, 402 and 403 of the narrowband internet of things access configuration method in this embodiment, and are not described herein again.

In combination with the above detailed description of the present embodiment, it can be seen that the present embodiment has at least the following beneficial technical effects compared with the prior art:

firstly, the frequency domain transmission resources of the primary synchronization signal, the secondary synchronization signal, the primary message block, the system message block and the first-class system message block are expanded from an anchor carrier to a non-anchor carrier, so that the load of the anchor carrier is greatly reduced, the existing NBIoT is applied to a time division duplex working mode, a higher spectrum resource utilization rate is obtained, and the system throughput and the connection efficiency of the NBIoT system in a massive user connection scene are obviously improved.

Secondly, the UE judges the system duplex mode according to the resource position of the synchronous signal, and uses the system duplex mode as a basis for determining the frequency domain resource position of the main message block, so as to further obtain the main message block and each system message block, so that the system design can configure the frequency domain transmission resources of the main message block and the system message block according to different duplex modes, thereby providing the duplex mode switching function and increasing the flexibility and the expandability of the NBIoT system based on the LTE.

Thirdly, a solution of multi-carrier configuration is provided for the frequency hopping transmission of the system message block and each physical channel, and the reliability and the overall performance of the system are obviously improved.

Fourthly, resource position information for indicating the transmission system message block is configured in a display or implicit mode, and the requirements of high confidentiality and access security of the system are met.

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

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

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by hardware related to instructions of a program, and the program may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.

While the method and apparatus provided by the present embodiment have been described in detail, those skilled in the art will appreciate that the various modifications, additions, substitutions, and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

1. A narrowband Internet of things access method comprises the following steps:

receiving a narrowband primary synchronization signal NPSS and a narrowband secondary synchronization signal NSSS used for synchronization on an anchor carrier, and determining a duplex mode according to the NPSS and the NSSS;

receiving, on an anchor carrier, a master information block, MIB, associated with a narrowband, wherein the MIB includes information indicating whether a carrier transmitting SIBs is a non-anchor carrier;

receiving system message block information (SIB) related to the narrowband on an anchor carrier or a non-anchor carrier based on scheduling information in the MIB;

wherein the SIB includes information indicating whether a carrier transmitting the other SIB is a non-anchor carrier;

wherein the MIB is carried on a narrowband physical broadcast channel NPBCH, and the SIB is carried on a narrowband physical downlink shared channel NPDSCH;

wherein the number of repetitions of the NPDSCH carrying the SIB and at least one subframe index are determined based on scheduling information in the MIB.

2. The narrowband internet of things access method of claim 1, wherein the SIB comprises a first type system message block information SIB1.

3. The narrowband internet of things access method of claim 1, wherein the MIB comprises information indicating that the anchor carrier is in an independent deployment mode or an in-band deployment mode;

information is included in the MIB for indicating whether the non-anchor carrier is a lower neighboring carrier relative to the anchor carrier or a higher neighboring carrier relative to the anchor carrier when the anchor carrier is in an independent deployment mode or an in-band deployment mode.

4. The narrowband internet of things access method of claim 1, wherein the MIB comprises information indicating whether the anchor carrier is in a guardband deployment mode;

the MIB includes information indicating whether the non-anchor carrier is in an in-band deployment mode when the anchor carrier is in the guardband deployment mode.

5. The narrowband internet of things access method of claim 1, further comprising:

determining an LTE system bandwidth based on the MIB;

determining an offset between the anchor carrier and the non-anchor carrier as a predetermined frequency value based on the LTE system bandwidth.

6. The narrowband internet of things access method of claim 1, further comprising:

information to determine whether the anchor carrier is located in a guard band based on the MIB;

determining whether the non-anchor carrier is located in another guard band opposite the guard band based on the MIB.

7. The narrowband internet of things access method of claim 6, wherein upon determining that the non-anchor carrier is located in another guard band opposite to the guard band, the non-anchor carrier is a carrier closest to an edge of an LTE carrier in the guard band opposite to the guard band in which the anchor carrier is located.

8. An access method for narrowband Internet of things access configuration is disclosed, wherein the method comprises the following steps:

sending a narrowband primary synchronization signal NPSS and a narrowband secondary synchronization signal NSSS used for synchronization to User Equipment (UE) on an anchor carrier, wherein the NPSS and the NSSS are used by the UE for determining a duplex mode;

transmitting a master information block, MIB, associated with a narrowband to the UE on an anchor carrier, wherein the MIB includes information indicating whether a carrier transmitting SIBs is a non-anchor carrier;

transmitting a system message block information (SIB) related to a narrowband to the UE on an anchor carrier or a non-anchor carrier;

wherein the MIB includes scheduling information for the SIB;

wherein the SIB includes information indicating whether a carrier transmitting other SIBs is a non-anchor carrier;

9. The access method of a narrowband internet of things (lot) access configuration of claim 8, wherein the SIB comprises a first type system message block information (SIB 1).

10. The access method of a narrowband internet of things (lot) access configuration of claim 8, wherein the MIB comprises information to indicate that the anchor carrier is in an independent deployment mode or an in-band deployment mode;

the MIB includes information indicating whether the non-anchor carrier is a lower neighbor carrier relative to the anchor carrier or a higher neighbor carrier relative to the anchor carrier when the anchor carrier is in an independent deployment mode or an in-band deployment mode.

11. The access method of a narrowband internet of things access configuration of claim 8, wherein the MIB comprises information indicating whether the anchor carrier is in a guardband deployment mode;

12. The access method of a narrowband internet of things access configuration of claim 8, wherein the MIB comprises information indicating an LTE system bandwidth;

wherein an offset between the anchor carrier and the non-anchor carrier is determined as a predetermined frequency value based on the LTE system bandwidth.

13. The access method of a narrowband internet of things access configuration of claim 8, wherein the MIB comprises information indicating whether the anchor carrier is located in a guard band;

the MIB includes information indicating whether the non-anchor carrier is located in another guard band opposite to the guard band.

14. The access method of the narrowband internet of things access configuration of claim 13, wherein the non-anchor carrier is a carrier closest to an edge of an LTE carrier in a guard band opposite to a guard band in which the anchor carrier is located, when the non-anchor carrier is located in another guard band opposite to the guard band.

15. A user equipment, comprising a processor and a memory;

the memory is used for storing computer operation instructions;

the processor is used for executing the method of any one of claims 1 to 7 by calling the computer operation instruction.

16. A base station, comprising a processor and a memory;

the memory is used for storing computer operation instructions;

the processor is used for executing the method of any one of claims 8 to 14 by calling the computer operation instruction.

17. A computer readable medium having stored thereon at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by a processor to implement the method of any one of claims 1 to 7,8 to 14.