CN107770877B

CN107770877B - listen before send LBT (local binary Transmission) execution method and related device

Info

Publication number: CN107770877B
Application number: CN201610696869.3A
Authority: CN
Inventors: 周明宇; 孙立新; 丁颖哲
Original assignee: Baicells Technologies Co Ltd
Current assignee: Baicells Technologies Co Ltd
Priority date: 2016-08-19
Filing date: 2016-08-19
Publication date: 2019-12-13
Anticipated expiration: 2036-08-19
Also published as: WO2018033106A1; CN107770877A

Abstract

the invention provides a listen before send LBT (local binary transmission) execution method and a related device, and relates to the field of communication. The LBT execution method of the access equipment side comprises the following steps: and sending a notification message carrying the configuration information of the LBT to the terminal, so that the terminal which does not establish the range control communication RRC connection can execute the operation flow of the LBT according to the configuration information of the LBT of the notification message. The terminal side LBT executing method comprises the following steps: acquiring a notification message which is sent by access equipment and carries the configuration information of the LBT; and if the terminal does not establish the range control communication RRC connection, executing the operation flow of the LBT according to the configuration information of the LBT in the notification message. The scheme of the invention can ensure that the terminal can also complete the related flow of LBT without establishing RRC connection, thereby ensuring that the terminal can successfully send MSG3 in the random access process.

Description

Listen before send LBT (local binary Transmission) execution method and related device

Technical Field

The present invention relates to the field of communications, and in particular, to a listen before send LBT execution method and related apparatus.

Background

Mobile communications have gone through first, second, third, and fourth generations. The first generation mobile communication refers to the initial analog, cellular telephone standard only for voice calls, mainly using analog technology and Frequency Division Multiple Access (FDMA) Access method; the second generation mobile communication introduces digital technology, improves network capacity, improves voice quality and confidentiality, and takes Global System for mobile communication (GSM) and Code Division Multiple Access (CDMA IS-95) as representatives; the third generation mobile communication mainly refers to CDMA2000, WCDMA and TD-SCDMA technologies, which all use code division multiple access as access technology; the standards of the fourth generation mobile communication system are relatively unified internationally, and are Long Term Evolution (Long Term Evolution/Long Term Evolution-Advanced, LTE/LTE-a) formulated by the international organization for standardization 3GPP, in which the downlink is based on an Orthogonal Frequency Division Multiple Access (OFDMA), and the uplink is based on an Access mode of a Single Carrier-Frequency Division Multiple Access (SC-FDMA), and high-speed transmission of the downlink peak rate of 1Gbps and the uplink peak rate of 500Mbps is achieved according to a flexible bandwidth and a self-adaptive modulation and coding mode.

the MulteFire is an LTE technology that newly defines an uplink transmission method on the basis of an LTE R13LAA downlink transmission method and can independently work in an unlicensed frequency band, i.e., stand-alone LTE-U. The MulteFire (abbreviated as MF) supports two Network modes (or called Network services), namely a PLMN access mode and a Neutral Host Network (NHN) access mode. The MF network can also support two network modes simultaneously

The MF supports a contention-based random access operation flow in the traditional LTE, and specifically comprises four steps of Msg1-Msg 4. When multiple UEs select the same Msg1 and collide, the base station allocates a UL grant to the Msg1 in the Msg2, multiple UEs sending the same Msg1 send Msg3 in the same UL grant, the Msg3 enables the eNB to finally solve at most the Msg3 sent by one UE (for example, with the maximum power) through a HARQ mode, and the eNB sends UE IDs successfully receiving the Msg3 in the Msg 4. In MF, Before sending Msg3, UE needs to perform LBT (Listen Before Talk), but at present, the configuration for LBT gap depends on RRC configuration, but for the UE of initial access, when initiating random access, RRC (radio resource Control) connection is not established, so that it is not possible to obtain the relevant configuration for LBT gap when sending Msg3, which may cause a phenomenon of Msg3 sending failure due to busy channel or cause sending failure of other users.

Disclosure of Invention

the invention aims to enable the terminal to execute the operation flow of LBT under the condition of not establishing RRC connection, thereby being capable of successfully sending MSG3 in the random access process.

in order to achieve the above object, in one aspect, the present invention provides a listen before send LBT executing method, applied to an access device, including:

And sending a notification message carrying the configuration information of the LBT to the terminal, so that the terminal which does not establish the range control communication RRC connection can execute the operation flow of the LBT according to the configuration information of the LBT of the notification message.

Optionally, sending a notification message carrying LBT configuration information to the terminal includes:

the configuration information of the LBT is transmitted to the terminal through a system broadcast message and/or a random access second message MSG 2.

Optionally, the configuration information of the LBT includes a plurality of configuration factors, each configuration factor having at least one configuration result;

if the configuration information of LBT is transmitted to the terminal through MSG2, the configuration information of LBT is encapsulated in the content of the uplink scheduling GRANT UL GRANT of the random access response RAR of MSG2, and the combined result of the configuration factors in the corresponding configuration result is represented in binary.

on the other hand, the invention also provides a listen before send LBT execution method, which is applied to a terminal and comprises the following steps:

acquiring a notification message which is sent by access equipment and carries the configuration information of the LBT;

And if the terminal does not establish the range control communication RRC connection, executing the operation flow of the LBT according to the configuration information of the LBT in the notification message.

Optionally, the obtaining of the notification message carrying the LBT configuration information sent by the access device includes:

The configuration information of LBT is obtained from a system broadcast message and/or a random access second message MSG2 sent from the access device.

in addition, the present invention also provides an access device, including: a transmitter, a memory, and a processor;

The memory stores a software program;

the processor, by executing the software program, is to:

and informing the sender to send a notification message carrying the configuration information of the LBT to the terminal, so that the terminal which does not establish the range control communication RRC connection can execute the operation flow of the LBT according to the configuration information of the LBT of the notification message.

Optionally, the processor controls the transmitter to transmit the configuration information of LBT to the terminal through a system broadcast message and/or a random access second message MSG2 by running the software program.

the configuration information of the LBT comprises at least the following configuration factors:

LBT types, LBT uplink transmission starting and stopping positions and LBT priorities supported by a base station.

in addition, the present invention also provides a terminal, comprising: a receiver, a memory, an executor, and a processor;

The memory stores a software program;

the processor, by executing the software program, is to:

Controlling the receiver to acquire a notification message which is sent by access equipment and carries the configuration information of the LBT;

And if the terminal does not establish the range control communication RRC connection, the control executor executes the operation flow of the LBT according to the configuration information of the LBT in the notification message.

In addition, the invention also provides a communication system which comprises the access equipment and the terminal.

The scheme of the invention has the following beneficial effects:

the scheme of the invention can ensure that the terminal can also complete the related flow of LBT without establishing RRC connection, thereby ensuring that the terminal can successfully send MSG3 in the random access process.

drawings

fig. 1 is a flowchart illustrating an LBT implementation method applied to an access device side according to the present invention;

Fig. 2 is a flowchart illustrating a method for performing LBT on a terminal side according to the present invention;

fig. 3 is a schematic structural diagram of an access device provided in the present invention;

Fig. 4 is a schematic structural diagram of a terminal provided in the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

In the existing random access method, the LBT operation needs to be completed before the UE sends Msg 3. However, for the UE initially accessing, no RRC connection is established during the random access, so that there may be a case where Msg3 is blocked from other users due to no LBT related configuration information. The present invention provides a solution to this problem.

in one aspect, an embodiment of the present invention provides a random access method, which is applied to an access device (e.g., a base station eNB, an access point AP, etc., and hereinafter, the random access method is described by taking the base station as an example), as shown in fig. 1, and includes:

step 11, sending a notification message carrying the LBT configuration information to the terminal, so that the terminal which does not establish the RRC connection for range control communication can execute the LBT operation process according to the LBT configuration information of the notification message.

By way of example, in step 11, the present embodiment may send the configuration information of LBT to the terminal through a system broadcast message and/or a random access second message MSG2, so that the terminal can perform an operation procedure of LBT according to the configuration information of LBT.

It can be seen that, in the method of this embodiment, the system broadcast message and/or the random access second message MSG2 are used to send the configuration information of LBT to the terminal, so that the terminal can complete the relevant procedures of LBT without establishing RRC connection, thereby ensuring that the terminal can successfully send MSG3 in the random access process.

In practical applications, the configuration information of LBT includes a plurality of configuration factors, each configuration factor having at least one configuration result.

specifically, as an exemplary introduction, the configuration factor at least includes an LBT type, an LBT uplink transmission start/stop position (e.g. PUSCH start position), and an LBT priority supported by the base station. In the prior art, a terminal may only complete an LBT operation procedure based on at least an LBT type, an LBT uplink transmission start-stop position, and an LBT priority.

the LBT execution method of the present embodiment is described in detail below with reference to several implementation manners, taking the fourth generation mobile communication system LTE/LTE-a and its derived Multe Fire as examples.

implementation mode one

in the first implementation manner, the configuration information of LBT is encapsulated in the content of the uplink scheduling GRANT UL GRANT of the random access response RAR of MSG2, and all the configuration information of LBT is transmitted to the terminal only through MSG 2.

assume that the configuration factors of the configuration information of LBT include: the base station includes an LBT type (LBT type), an LBT gap (a time interval reserved in an uplink subframe for LBT, which is related information for determining an uplink transmission start position), and an LBT channel access priority (LBT channel access priority) supported by the base station. There are four configuration results of LBT gap, namely 25us, 25us + TA (Timing Advance), symbol 1 and symbol0 (i.e. no LBT gap); the LBT type has two configuration results, namely one shot LBT (25us) and LBT CAT-4 in the prior art; the LBT channel access priority has 4 configuration results, i.e. priorities 1-4, it should be noted that the priority is only required when the LBT type is LBT CAT-4.

For the LBT type of LBT CAT-4, since the Msg3 only occupies 1 subframe, the channel access priority of LBT CAT-4 is only 1, for example, priority 1. If a second-level mechanical language is used to represent all LBT types, LBT gaps and LBT channel access priorities, then there are several permutation and combination results as shown in Table one.

watch 1

as seen from Table I, there are only 5 cases 000-100 in this embodiment, so that the binary system only occupies 3 bits to represent all possible configuration information of LBT (where 101-111 are redundant and can be reserved to represent other meanings).

Further, for LBT type being LBT CAT-4, its scheduled Msg3 should be located outside the TxOP (transmission opportunity) of eNB, and there may not be a need to support time division multiplexing among multiple users, so that fewer LBT gap options (for example, only one LBT gap configuration is supported, specifically, no LBT gap) may be specified in the standard, that is, transmission may be started from the first symbol (symbol0) of the scheduled UL subframe, and the corresponding binary code is as shown in table two.

watch two

in practical application, when the terminal enters an immediate access request, the MSG1 is sent to the base station, and the base station sends the MSG2 carrying the LBT configuration information to the terminal according to the MSG1, so that the terminal can execute the LBT operation flow according to the LBT configuration information of the MSG2 before sending the MSG 3.

Implementation mode two

in the second implementation manner, the LBT configuration information is sent to the terminal through two messages, namely, the system broadcast message and the MSG 2. It is assumed that the configuration factor of the configuration information of LBT further includes: LBT gap, LBT type, and LBT channel priority. Wherein, LBT gap has four configuration results, namely configuration 1-4; the LBT type has two configuration results, namely LBT Cat-4 and One shot LBT; there are 4 LBT channel access priorities, i.e. priorities 1-4.

it is assumed that in the second implementation, two LBT gap configurations supported by the cell are encapsulated in a system broadcast message and sent to the terminal, and a specific LBT gap configuration (one of the two configurations in the system broadcast message), an LBT type, and an LBT channel access priority are encapsulated in MSG2 and sent to the terminal. Then, in the UL GRANT of MSG2, only binary representation LBT gap is needed to be configuration 1 or configuration 2, LBT type and LBT channel access priority, and the corresponding content is shown in table two.

watch III

as seen from Table two, there are only 4 cases 00-11 in this embodiment, so the binary occupies only 2 bits of MSG 2.

in practical application, on one hand, a base station periodically sends a system broadcast message carrying partial LBT configuration information, and a terminal acquires the system broadcast message after receiving the system broadcast message. On the other hand, when the terminal enters the immediate access request, the MSG1 is sent to the base station, and the base station sends the MSG2 carrying the configuration information of the LBT of another part to the terminal according to the MSG1, so that the terminal can execute the operation flow of LBT according to the system broadcast message and the configuration information of LBT in the MSG2 before sending the MSG 3.

obviously, based on the principle of the second embodiment, the overhead of LBT related information can be reduced by sending LBT configuration information to the terminal in a time-sharing manner through the system broadcast message and the MSG 2. Meanwhile, the configuration factors of the configuration information of the LBT and the configuration results corresponding to the set configuration factors are flexibly distributed in the system broadcast message and the MSG2, so that the byte length of the MSG2 can be accurately controlled, and the length of the MSG2 in the scheme is consistent with that of the MSG2 in the prior art.

implementation mode three

It is assumed that the third implementation is based on the second implementation and additionally represents the scheduling option content in the UL GRANT content of the MSG 2.

Wherein, when indicating scheduling option 2, Msg3 should be located within the TxOP of eNB, so its LBT type can only be one-shot LBT (25 us). The corresponding second level system code is shown in table three.

watch III

As seen from table three, the present embodiment only has 8 cases of 000-111, so that the binary system only occupies 3 bits to represent all possible configuration information of LBT.

Obviously, in the fourth implementation manner, the scheduling option is only used as an exemplary description, and is used to indicate that the binary system adopted in the present invention may not only indicate the configuration information of LBT, but also further indicate other configuration information of UL GRANT.

Implementation mode four

it is assumed that the fourth implementation manner sends all the configuration information of LBT to the terminal only through the system broadcast message. In practical application, the base station sends the system broadcast message carrying the configuration information of all LBTs periodically, and the terminal can execute the operation flow of LBT after receiving the system broadcast message.

for a rational introduction, the fourth implementation manner may be the configuration parameters of the LBT configuration indicated in the parameter SIB-MF/SIBx (x is a positive integer) of the system broadcast message, and since the system broadcast message itself is a notification effect in the prior art and the representation method is a commonly used technical means in the art, the description of this implementation manner is not repeated herein for example.

the above is an introduction of the base station side LBT performing method of the present invention. It should be noted that in the above implementation, in addition to the two-level language used to represent the configuration factors of the MSG2, other mechanical languages, such as decimal, may be used for representation. In addition, the present embodiment also does not specifically limit the configuration factor of LBT and the configuration result corresponding to the configuration factor.

in addition, in the scheme of the invention, the length of the occupied byte of the MSG2 is not increased. The present embodiment may also be modified from some of the other existing MSG 2. For example, in the prior art, the resource allocation manner of the MSG2 can be generally expressed by 10 bits, 6 bits and 4 bits. In order to make the MSG2 consistent with the transmitted size, the present invention can make the resource allocation manner of the MSG2 expressed by 6 bits or 4 bits, thereby leaving a certain bit free for expressing the configuration information of LBT.

Correspondingly, the present invention further provides a listen before talk LBT executing method applied to a terminal side, which is applied to a terminal, as shown in fig. 2, and includes:

Step 21, obtaining a notification message carrying LBT configuration information sent by an access device;

by way of exemplary introduction, in step 21, the present embodiment may obtain the configuration information of the LBT through a system broadcast message and/or a random access second message MSG2 sent from the access device.

Step 22, if the terminal does not establish the RRC connection for the range control communication, the LBT operation procedure is executed according to the LBT configuration information in the notification message.

Obviously, the LBT performing method at the terminal side of the present embodiment is applied to the LBT performing method at the access device side, and therefore the same beneficial effects can be achieved based on the LBT performing method at the access device side.

Correspondingly, in this embodiment, the configuration information of the LBT includes a plurality of configuration factors, and each configuration factor has at least one configuration result.

If the configuration information of LBT is obtained at least from MSG2 sent by the access device, the configuration information of LBT is encapsulated in the content of the uplink scheduling GRANT UL GRANT of the random access response RAR of MSG2, and the combination result of the configuration factor in the corresponding configuration result is expressed in mechanical language.

in practical application, the configuration factors and corresponding configuration results of the configuration information of LBT are both determined, and assuming that all the configuration information of LBT is obtained from MSG2 sent by the access device, the terminal side can directly determine which configuration factors and corresponding configuration results exist in the configuration information in MSG2, so that the meaning of representing several combination results corresponding to mechanical language is also determined, and only direct reading is needed.

if the terminal acquires a part of configuration factors of the configuration information of the LBT from the system broadcast message and acquires another part of configuration factors from the MSG2, assuming that the base station can flexibly distribute the configuration information of the LBT to the system broadcast message and the MSG2, the terminal side cannot directly determine which configuration factors the mechanical language in the MSG2 represents, so in the specific step of acquiring the configuration information of the LBT from the MSG2, the terminal line acquires a part of configuration factors of the configuration information of the LBT from the system broadcast message and determines the rest configuration factors which need to be acquired from the MSG2 according to the configuration factors acquired from the system broadcast message;

After the terminal determines which configuration factors of the configuration information of the LBT exist in the MSG2, the reading mode of the mechanical language can be determined, and the information of the configuration factors corresponding to the mechanical language conversion in the MSG2 is converted according to the reading mode.

by way of further exemplary introduction, it is assumed that the configuration factors of the configuration information of LBT include: A. b, C, D. If all the signals are transmitted by the MSG2, the terminal only needs to store a mechanical language reading method.

if the base station randomly allocates the configuration factor A, B, C, D to the system broadcast message and the MSG2 in a dynamic manner, it is assumed that the configuration factor a is responsible for transmission by the system broadcast message and the configuration factor B, C, D is responsible for transmission by the MSG 2. The terminal side does not know what configuration factors are carried in the MSG2 from the beginning, so that the meaning of the concrete representation cannot be determined from the mechanical language of the MSG 2. When the terminal side receives the system broadcast message and determines that the system broadcast message carries the configuration factor a, it may be determined that the configuration factor carried in the MSG2 is B, C, D. And then, converting the mechanical language in the MSG2 into specific configuration information according to a reading mode which is stored in advance and corresponds to the configuration factor in the MSG2 being B, C, D, thereby completing the operation flow of the LBT.

In addition, another embodiment of the present invention further provides an access device, as shown in fig. 3, including:

a transmitter 31, a memory 32, and a processor 33;

Wherein the memory 31 stores a software program, and the processor is configured to:

The notification transmitter 31 transmits a notification message carrying the LBT configuration information to the terminal, so that the terminal which does not establish the RRC connection for range control communication can execute the LBT operation procedure according to the LBT configuration information of the notification message.

the access device of this embodiment sends the configuration information of LBT to the terminal by using the notification message, so that the terminal can complete the relevant flow of LBT even if the RRC connection is not established, thereby ensuring that the terminal can successfully send MSG3 in the random access process.

Specifically, the configuration information of LBT of this embodiment includes a plurality of configuration factors, each configuration factor having at least one configuration result.

By way of exemplary introduction, the configuration information of LBT includes at least the following configuration factors: LBT types, LBT uplink transmission starting and stopping positions and LBT priorities supported by a base station.

If the configuration information of LBT is transmitted to the terminal through MSG2, the configuration information of LBT is encapsulated in the content of the uplink scheduling GRANT UL GRANT of the random access response RAR of MSG2, and the combination result of the configuration factor in the corresponding configuration result is represented in binary.

specifically, if the configuration information of the LBT is transmitted to the terminal through the system broadcast message and the MSG2, the processor 33 of this embodiment controls the transmitter 31 to transmit a part of the configuration factors in the configuration information of the LBT to the terminal through the system broadcast message and transmit another part of the configuration factors in the configuration information of the LBT to the terminal through the MSG2 by running a software program.

obviously, the access device of this embodiment corresponds to the LBT performing method applied to the access device side provided by the present invention, and therefore the same technical effects can be achieved.

in addition, another embodiment of the present invention further provides a terminal, as shown in fig. 4, including:

A receiver 41, a memory 42, an actuator 43, and a processor 44;

wherein the memory 42 stores a software program, and the processor 44 is configured to:

The control receiver 41 obtains a notification message carrying LBT configuration information sent by the access device;

if the terminal does not establish the RRC connection for the range control communication, the executor 43 is further controlled to execute the operation procedure of LBT according to the configuration information of LBT in the notification message.

Obviously, the terminal of this embodiment corresponds to the access device provided by the present invention, and therefore, based on the access device, the terminal of this embodiment can achieve the same technical effect as the access device.

If the receiver 41 obtains the configuration information of LBT from at least MSG2 sent by the access device, the configuration information of LBT is encapsulated in the content of the uplink scheduling GRANT UL GRANT of the random access response RAR of MSG2, and the combination result of the configuration factor in the corresponding configuration result is expressed in mechanical language.

specifically, if the configuration information of the LBT is obtained through the system broadcast message and MSG2, processor 44 controls receiver 41 according to the software program to obtain a part of configuration factors of the configuration information of the LBT from the system broadcast message, and obtain another part of configuration factors of the configuration information of the LBT from MSG 2.

Specifically, under the control of the processor 44, the flow of the receiver 41 acquiring the configuration factor is as follows:

Acquiring a part of configuration factors of the configuration information of the LBT from the system broadcast message, and determining the rest configuration factors which need to be acquired from the MSG2 according to the configuration factors acquired from the system broadcast message;

and acquiring the mechanical language of the corresponding LBT configuration information from the MSG2, determining the mechanical language reading mode according to the determined other configuration factors which need to be acquired from the MSG2, and converting the acquired mechanical language into the corresponding configuration factor according to the determined reading mode.

Obviously, the terminal of the present embodiment corresponds to the LBT performing method applied to the terminal side provided by the present invention, and therefore the same technical effects can be achieved.

in addition, the invention also provides a communication system which comprises the access equipment and the terminal. Obviously, the communication system of the present invention sends the LBT configuration information to the terminal by using the system broadcast message and/or the random access second message MSG2, so that the terminal can complete the relevant procedures of LBT without establishing RRC connection, thereby ensuring that the terminal can successfully send MSG3 in the random access process.

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

in addition, the terms "system" and "network" are often used interchangeably herein.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

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

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

An embodiment of the present invention further provides a1. a listen before send LBT execution method, applied to an access device, including:

A2. The LBT performing method of claim A1,

Sending a notification message carrying the configuration information of the LBT to the terminal, comprising:

A3. The LBT performing method of claim A2,

the configuration information of the LBT includes a plurality of configuration factors, each configuration factor having at least one configuration result.

A4. The LBT performing method of claim A3,

A5. The LBT performing method of claim A3,

A6. the LBT performing method of claim A5,

if the configuration information of the LBT is transmitted to the terminal through the system broadcast message and the MSG2, a part of the configuration factors in the configuration information of the LBT is transmitted to the terminal through the system broadcast message, and another part of the configuration factors is transmitted to the terminal through the MSG 2.

The embodiment of the present invention further provides B7. a listen before send LBT executing method, applied to a terminal, and characterized by comprising:

B8. The LBT performing method of claim B7,

acquiring a notification message carrying configuration information of an LBT and sent by an access device, comprising:

B9. The LBT performing method of claim B8,

B10. the LBT performing method of claim B9,

if the configuration information of the LBT is obtained through the system broadcast message and the MSG2, a part of configuration factors of the configuration information of the LBT is obtained from the system broadcast message, and another part of configuration factors is obtained from the MSG 2.

B11. the LBT performing method of claim B10,

obtaining a part of configuration factors of the configuration information of the LBT from the system broadcast message, and obtaining another part of configuration factors from the MSG2, including:

and acquiring the mechanical language of the corresponding LBT configuration information from the MSG2, determining the mechanical language reading mode according to the determined other configuration factors which need to be acquired from the MSG2, and converting the mechanical language into the corresponding configuration factor according to the reading mode.

An embodiment of the present invention further provides c12. an access device, including: a transmitter, a memory, and a processor;

The memory stores a software program;

the processor, by executing the software program, is to:

And controlling the sender to send a notification message carrying the configuration information of the LBT to the terminal, so that the terminal which does not establish the range control communication RRC connection can execute the operation flow of the LBT according to the configuration information of the LBT of the notification message.

C13. the access device of claim C12,

the processor controls the transmitter to transmit the configuration information of the LBT to the terminal by means of a system broadcast message and/or a random access second message MSG2 by running the software program.

C14. The access device of claim C13,

C15. The access device of claim C14,

C16. the access device of claim C13,

C17. The access device of claim C16,

If the configuration information of the LBT is transmitted to the terminal through the system broadcast message and the MSG2, the processor controls the transmitter to transmit a part of the configuration factors of the LBT to the terminal through the system broadcast message and transmit another part of the configuration factors of the LBT to the terminal through the MSG2 by running the software program.

An embodiment of the present invention further provides a terminal, which is characterized by comprising: a receiver, a memory, an executor, and a processor;

the memory stores a software program;

the processor, by executing the software program, is to:

D19. The terminal of claim D18,

The processor controls the receiver to obtain the configuration information of LBT through the system broadcast message and/or the random access second message MSG2 sent from the access device by running the software program.

D20. the terminal of claim D19,

D21. The terminal of claim D20,

If the configuration information of LBT is obtained from the system broadcast message and the MSG2, the processor controls the receiver to obtain a part of configuration factors in the configuration information of LBT from the system broadcast message and another part of configuration factors in the configuration information of LBT from the MSG2 by running the software program.

D22. the terminal of claim D21,

The processor controls the receiver to obtain another part of configuration factors in the configuration information of the LBT from the MSG2 by running the software program, including:

An embodiment of the invention also provides a communication system, characterized in that it comprises an access device according to any of claims C12-C17 and a terminal according to any of claims D18-D22.

Claims

1. A Listen Before Talk (LBT) execution method applied to an access device is characterized by comprising the following steps:

sending a notification message carrying the configuration information of the LBT to the terminal, so that the terminal which does not establish the range control communication RRC connection can execute the operation flow of the LBT according to the configuration information of the LBT of the notification message;

sending the configuration information of the LBT to the terminal through a system broadcast message and/or a random access second message MSG 2;

The configuration information of the LBT comprises a plurality of configuration factors, each configuration factor having at least one configuration result;

2. The LBT performing method of claim 1,

3. the LBT performing method of claim 1,

4. a Listen Before Talk (LBT) execution method is applied to a terminal and is characterized by comprising the following steps:

if the terminal does not establish the range control communication RRC connection, executing an operation flow of the LBT according to the configuration information of the LBT in the notification message;

acquiring configuration information of LBT (local binary transmission) through a system broadcast message and/or a random access second message MSG2 sent by access equipment;

5. the LBT performing method of claim 4,

6. The LBT performing method of claim 5,

7. an access device, comprising: a transmitter, a memory, and a processor;

The memory stores a software program;

The processor, by executing the software program, is to:

Controlling the sender to send a notification message carrying the configuration information of the LBT to the terminal, so that the terminal which does not establish the range control communication RRC connection can execute the operation flow of the LBT according to the configuration information of the LBT of the notification message;

the processor controls the transmitter to transmit the configuration information of the LBT to the terminal through a system broadcast message and/or a random access second message MSG2 by running the software program;

8. The access device of claim 7,

9. The access device of claim 7,

10. a terminal, comprising: a receiver, a memory, an executor, and a processor;

The memory stores a software program;

The processor, by executing the software program, is to:

if the terminal does not establish the range control communication RRC connection, the control executor executes the operation flow of the LBT according to the configuration information of the LBT in the notification message;

the processor controls the receiver to acquire the configuration information of the LBT through a system broadcast message and/or a random access second message MSG2 sent by the access equipment by running the software program;

11. the terminal of claim 10,

12. The terminal of claim 11,

13. A communication system comprising an access device according to any of claims 7-9 and a terminal according to any of claims 10-12.